СПОСОБ И УСТРОЙСТВО ДЛЯ ИЗГОТОВЛЕНИЯ ИЗДЕЛИЯ ТРУБЧАТОЙ ФОРМЫ ИЗ ТЕРМОПЛАСТИЧНОГО МАТЕРИАЛА

Способ и устройство по изобретениям предназначены для изготовления изделий трубчатой формы (например, гофрированной трубки) из термопластичного материала. Устройство содержит головку экструдера, имеющую дорн, перемещаемый с целью изменения площади поперечного сечения отверстия головки, плунжер, предназначенный для экструдирования определенного количества пластичного материала через головку, и вытяжной блок, направленно вытягивающий из головки выпускаемое ею пластиковое изделие трубчатой формы. Перемещениями вытяжного блока, плунжера и дорна управляют таким образом, чтобы движение вытяжного блока и плунжера происходило согласно профилям скоростей, автономно регулируемым по всему пути вытяжного блока и плунжера. Перемещение же дорна совершается согласно профилю позиций, автономно регулируемому по всему пути вытяжного блока или плунжера, причем это перемещение должно происходить за то же время, что и перемещение вытяжного блока и плунжера. В результате толщину стенки изделия трубчатой формы ...

Способ и устройство для формирования кромок гофрированной пластиковой панели и панель, изготовленная с использованием такого способа

Изобретение относится к способу формирования кромок сотовой пластиковой панели. Техническим результатом является плотное закрытие панели по кромке и повышение стойкости панели к ударам. Технический результат достигается способом формирования кромок сотовой пластиковой панели, который включает обеспечение наличия сотовой пластиковой панели, имеющей открытую кромку, расположенную по периметру, нагревание термопластичного эластомерного материала до его точки плавления, нагревание по меньшей мере части кромки, экструдирование расплавленного термопластичного эластомерного материала и укладку расплавленного материала вдоль всех кромок по периметру панели с заполнением пустот панели для их плотного закрывания относительно внешнего пространства. При этом операцию укладки выполняют под углом менее 45° к касательной в точке укладки. 3 н. и 11 з.п. ф-лы, 9 ил.

Способ изготовления полимерного изделия

Группа изобретений относится к способам изготовления полимерного изделия (варианты), обеспечивающая либо выбор, модификацию существующих и/или создание новых разработанных полимерных материалов. Способы могут обеспечивать улучшенную реакцию на приложение локального сдвига и/или деформации растяжения внутри расплава полимера в различных технологиях изготовления, таких как литье под давлением (IM), литье под давлением с раздувом и ориентированием (ISBM), безлитниковое литье под давлением (DI), экструзионно-раздувное формование (ЕВМ), изготовление листов экструзией, термоформование. Предусмотрен способ изготовления полимерного изделия, включающий литье или экструдирование расплавленного полимера на основе полипропилена, полиэтилена или сложного полиэфира с преобразованием его в (полу)конечную форму при приложении сдвига и/или деформации растяжения по отношению к расплаву полимера, где прилагаемые по отношению к расплаву полимера сдвиг и/или деформация растяжения предусматривают выборочную ...

ГОЛОВКА ДЛЯ ЭКСТРУЗИИ РУКАВА И СПОСОБ ИЗГОТОВЛЕНИЯ РУКАВА

Изобретение относится к головке для экструзии рукава. Головка для экструзии рукава, для изготовления рукава, имеет корпус головки, канал, который выполнен в корпусе головки, для подвода материала для рукава, дорн, который расположен в канале, мундштук и по меньшей мере один крепежный элемент. Крепежный элемент одним концом закреплен на мундштуке так, что этот конец следует движению мундштука. Изобретение обеспечивает изготовление рукава с гомогенной толщиной стенки простым образом. 3 н. и 7 з.п. ф-лы, 3 ил.

СПОСОБ И УСТРОЙСТВО ГРАНУЛИРОВАНИЯ С РЕГУЛИРОВАНИЕМ ДАВЛЕНИЯ

Изобретение относится к способу и устройству регулирования давления жидкости или пульпы. Описаны способы и устройство гранулирования, включающие динамическое регулирование давления в приемнике для улучшения контроля над качеством гранул и их гранулометрическим составом. В одном из вариантов осуществления настоящего изобретения осуществляется регулирование давления в свободном пространстве над объемом жидкости или пульпы с тем, чтобы обеспечить более точное регулирование давления жидкости или пульпы в приемнике. В другом варианте осуществления настоящего изобретения для обеспечения более точного регулирования давления жидкости или пульпы в приемнике используется устройство для создания осевого восходящего потока. Изобретение позволяет повысить качество и гранулометрический состав произведенных гранул. 2 н. и 8 з.п. ф-лы, 9 ил.

УСТРОЙСТВО ДЛЯ ЭКСТРУЗИИ ПОЛОСОВЫХ ИЛИ ЛЕТНОЧНЫХ ЗАГОТОВОК ИЗ ТЕРМОПЛАСТИЧНОЙ ПЛАСТМАССЫ, А ТАКЖЕ СПОСОБ ЭКСТРУЗИИ ТАКОЙ ЗАГОТОВКИ

... 1. Устройство для экструзии полосовых или ленточных заготовок (1) из термопластичной пластмассы, содержащее экструзионную головку, выход расплава из которой выполнен в виде перемещаемого поперек направления экструзии, проходящего прямолинейно щелевого сопла, отличающееся тем, что щелевое отверстие (6) сопла, по меньшей мере, с одной стороны непосредственно ограничено несколькими сегментами (9), устанавливаемыми независимо друг от друга поперек направления экструзии и обеспечивающими ступенчатое регулирование величины и/или ширины щелевого отверстия (6) сопла. ! 2. Устройство по п.1, отличающееся тем, что каждый сегмент выполнен в виде задвижки (9), устанавливаемой с помощью исполнительных устройств (10) поперек направления расплава. ! 3. Устройство по п.1, отличающееся тем, что сегменты (9) устанавливаются во время экструзии динамично. ! 4. Устройство по п.1 или 3, отличающееся тем, что централизованная регулировка величины щелевого отверстия (6) сопла с помощью отдельной детали, действующей ...

ЭКСТРУДЕР И СПОСОБ ЭКСТРУЗИИ КОМПОНЕНТОВ ШИНЫ, АРМИРОВАННЫХ КОРДАМИ

ГОЛОВКА ДЛЯ ЭКСТРУЗИИ РУКАВОВ С ТРЕХФУНКЦИОННЫМ КОНСТРУКТИВНЫМ ЭЛЕМЕНТОМ И СПОСОБ ВЫПУСКАНИЯ РУКАВА ИЗ РАСПЛАВА

СПОСОБ ЭКСТРУЗИИ И УСТРОЙСТВО ДЛЯ ИЗГОТОВЛЕНИЯ ЭЛАСТОМЕРНЫХ КОМПАУНДОВ

... 1. Способ экструзии для изготовления эластомерных компаундов, содержащий этапы, на которых:i) оценивают физико-химические свойства изготавливаемого компаунда;ii) выбирают и устанавливают одну из множества заменяемых экструзионных головок (5) в разгрузочном отверстии (2b) экструзионного устройства (1), как функцию по меньшей мере одного из физико-химических свойств, или оставляют разгрузочное отверстие (2b) свободным для того, чтобы поддерживать температуру компаунда и/или выходное давление указанного экструзионного устройства ниже критических пороговых значений для указанного компаунда;iii) вводят по меньшей мере один предшественник указанного изготавливаемого компаунда через по меньшей мере одно отверстие (2а) подачи экструзионного устройства (1);iv) смешивают и выполняют перемещение указанного по меньшей мере одного предшественника вдоль камеры (3) экструзионного устройства (1), содержащей по меньшей мере один экструзионный шнек (4);v) выпускают компаунд через указанную экструзионную ...

УСТРОЙСТВА И СПОСОБЫ НАНЕСЕНИЯ РАДИУСНОГО ЗАПОЛНИТЕЛЯ

Verfahren zur Herstellung von Formlingen auf plattenförmigen Gegenständen mittels Strangpressdüse

VERFAHREN UND VORRICHTUNG ZUM HERSTELLEN EINES BIAXIAL ORIENTIERTEN ROHRES AUS THERMOPLASTISCHEM KUNSTSTOFF

Düsen

Vorrichtung zur Regelung des Materialflusses bei einem Prozess mit Abgabe eines fliessfähigen Mediums.

VERFAHREN UND WERKZEUG ZUM FORMEN VERNETZBARER KUNSTSTOFFE ODER ELASTOMERE AUS FLIESSFAEHIG AUFBEREITETEM AUSGANGSMATERIAL

Verfahren zur Herstellung geschäumter Polymerformkörper und geschäumter Polymerformkörper

Verfahren zur Herstellung geschäumter mikroporöser Polymerformkörper durch Aufschmelzen eines thermoplastischen Polymers in einer ersten Zone einer Extrusionseinrichtung, Einmischen eines leichtflüchtigen Treibmittels, Förderung der treibmittelhaltigen Polymerschmelze in eine zweite Zone, in der ein Lösen des Treibmittels bis zur Sättigung der Polymerschmelze bei der Schäumungstemperatur erfolgt, Ausformung und Schäumen der beladenen Polymerschmelze zu einer Schaumstruktur, wobei in der zweiten Zone ein Druck oberhalb von 90 bar, eine Treibmittelkonzentration oberhalb der kritischen Mindestkonzentration für eine Vollverschäumung und die Schäumungstemperatur so oberhalb der Erstarrungstemperatur der mit Treibmittel gesättigten Polymerschmelze eingestellt werden, dass der erhaltene Polymerformkörper eine Porosität im Bereich zwischen 40 und 85 Vol.-% und eine gleichmäßig über den Querschnitt verteilte offenzellige Porenstruktur aufweist. Geschäumte mikroporöse Polymerformkörper in partikelförmiger ...

Vorrichtung zum Extrudieren von Hohlsträngen

Vorrichtung zur Beeinflussung des Volumenstroms von extrudiertem plastisch verformbaren Werkstoff

Bei der Vorrichtung zur Beeinflussung des Volumenstroms von extrudiertem plastisch verformbaren Werkstoff wird dieser zu einer Austrittsdüse bei der additiven Herstellung von Bauteilen gefördert. Es ist ein Flansch (1), der zwischen einer Extrusionseinheit und einer Austrittsdüse (3) angeordnet und mit der Extrusionseinheit und der Austrittsdüse (3) verbunden. Im Flansch (1) ist ein ausgehend von der Extrusionseinheit bis zur Austrittsdüse (3) ausgebildeter Kanal (10) eingebracht. Im Flansch (1) ist ein Kolben (2) senkrecht zur Längsachse des Kanals (10) drehbar gelagert und durch den Kanal (10) geführt. Im Kolben (2) ist eine Bohrung (8) ausgebildet, die in einen Bypasskanal (9) mündet, der zu einer Bypassdüse (5) geführt ist. An der äußeren Mantelfläche des Kolbens (2) ist mindestens eine Nut (2.1) im Bereich des Kanals (10) so ausgebildet, dass in Abhängigkeit der Winkelstellungen des Kolbens (1) Werkstoff (6) durch die Nut (2.1) in Richtung Austrittsdüse (3) und/oder durch die Bohrung ...

Verfahren und Vorrichtung zur Durchmesser-Kontrolle von klaren extrudierten Rohren

METHODE UND VORRICHTUNG ZUM KONTINUIERLICHEN STRANGPRESSEN VON BLOCKELEMENTEN

Betätigungsvorrichtung zum Einstellen einer Breitschlitzdüse

Anordnung mit einer Breitschlitzdüse (2) oder Runddüse (150) mit einer Vielzahl von Einstellelementen (8, 22), wobei die Einstellelemente über die Breite der Breitschlitzdüse oder entlang des Umfangs der Runddüse (150) verteilt angeordnet sind und wobei mittels eines Einstellelements der Vielzahl von Einstellelementen (8, 22) a) die Spaltbreite (h) des Düsenspalts (16, 152) in einem Breitenbereich der Breite der Breitschlitzdüse oder einem Umfangsabschnitt des Umfangs der Runddüse verstellbar ist, und/oder b) ein Stauelement (18) oder ein Abschnitt eines Stauelements, welches einen Breitenbereich eines Zulaufbereichs (14) der Breite der Breitschlitzdüse oder einen Umfangsbereich der Runddüse (150) abdeckt, verstellbar ist, wobei das Stauelement einen Strömungsquerschnitt (k) im Zulaufbereich (14) der Breitschlitzdüse oder Runddüse (150) begrenzt, und einer Betätigungsvorrichtung (60) zum Betätigen der Vielzahl der Einstellelemente (8, 22) a) zur Verengung oder Erweiterung der Spaltbreite ...

Flow channel for use in e.g. extrusion nozzle to convey plastic melt, has flexible portion whose surface area forms flow channel wall and is changed in position in limited manner, where flexible portion is made of rubber or elastomer

The channel (1) has a wall (3) whose portion is formed in a flexible manner and fixed with adjusting units i.e. adjusting screws (4), where geometry of the channel is adjusted. A flexible portion (2) is made of a rubber or an elastomer having a usual operating temperature of greater than 200 degree Celsius, where a surface area of the flexible portion forms the flow channel wall. The surface area in the flexible portion is changed in a position in a limited manner. Height of a gap of the channel is evenly adjusted using the adjusting screws. The adjusting units are designed as heat expansion pins, piezo translators, servo or stepping motors and position systems. Independent claims are also included for the following: (1) a method for discharging a fluent mass (2) a method for controlling an amount or a thickness of a fluent mass.

Seam yarn for surgical wound closure, particularly in the area of soft tissue, has one-piece suture body, where cross sectional area of suture body has multiple irregularly shaped radial notches

The seam yarn (10) has a one-piece suture body (14), where the cross sectional area of the suture body has multiple irregularly shaped radial notches (16). The notches extend over a large part of the axial length of the suture body. The notches are arranged and distributed in the circumferential direction. Two or more notches have a direction of extension in different planes. Independent claims are also included for the following: (1) an extrusion die for extruding a seam yarn; and (2) a method for manufacturing a seam yarn for surgical wound closure.

VERFAHREN UND VORRICHTUNG ZUR FOLIENEXTRUSION

Verfahren zum Strangpressen von Gummi und gummiaehnlichem Material und Vorrichtung zur Durchfuehrung des Verfahrens

Improvements in or relating to the production of artificial foils and films

... Films and foils of uniform thickness are produced by a continuous process in which a film-forming solution, comprising, for instance, a cellulose derivative, is extruded or allowed to flow on to a casting surface to form a film or foil, and, while the film or foil is still plastic, the height of the upper surface of the film or foil above the casting surface is determined by lowering a suitable measuring means until visual indication that contact is made is provided by a marking of the surface of the film or foil. The mark subsequently flows out of the film or foil and, by adjusting the supply of film-forming solution in accordance with the thickness of the film or foil indicated by the measuring means, film or foil indicated by the uniform thickness is produced. In Fig. 1, the film is formed on the casting wheel p 6, and the thickness of the film is measured at various points across its width by the micrometer gauges 5. Additional gauges, such as ...

PROCESS AND APPARATUS FOR CONTROLLING DIMENSIONS IN PLASTICS EXTRUSIONS

... 1372501 Controlling thickness of foamed plastics extrusions OWENS-ILLINOIS Inc 3 Oct 1972 45551/72 Heading B5A [Also in Division G3] In the production of a foamed thermoplastics sheet, e.g. of polystyrene, by extrusion either from a flat sheet die or, as in the described embodiment, by extrusion of a tube 30 which is slit by knives 34 at diametrically opposed locations 31, uniformity of thickness of the sheet transversely of its direction of advancement from the die is obtained by measuring the thickness at a number of locations spaced transversely across the advancing sheet, and either manually or automatically raising or lowering the temperature of the die lips, in areas forming the regions of the sheet at which the thickness are measured, respectively to increase or decrease the thickness of the sheet at the locations. The temperatures are controlled by a plurality of independently controlled heating and/or cooling heat exchangers circumferentially spaced around at least one die lip, ...

Improvements in and relating to machines for de-airing plastic materials

... 663,329. De-airing plastic materials. EDWARDS & JONES, Ltd., JONES, A., JONES, W. H., and JONES, S. July 27, 1950. [Aug. 23, 1949] No. 21818/49. Class 86. In a machine for de-airing plastic materials comprising a feed barrel, a chamber susceptible to vacuum action, and holes or openings through which the material is extruded from the barrel to the chamber, means are provided whereby the dimensions of the holes or openings can be adjusted to suit the material being dealt with. As described the apparatus comprises a first pug or barrel 11, Fig. 2, a vacuum chamber 15 and a second pug or barrel 16, not shown in Fig. 2, having its inlet end vertically below the vacuum chamber and having an extrusion die at its outlet end. A pair of plates 30, 31, each having correspondingly arranged perforations 37, 38, Fig. 3, are provided between the pug 11 and the chamber 15, the plate 31 being capable of limited rotary movement under the action of a rack and worm mechanism 32, 33 whereby the corresponding ...

PRODUCTION OF FILMS OF UNIFORM THICKNESS

... 1390226 Films of uniform thickness CELANESE CORP 15 June 1972 [28 June 1971] 27977/72 Heading B5B Biaxially drawn film of substantially uniform thickness across its width is made by extruding a molten thermoplastic through a die 12 to obtain a film 21 and biaxially drawing the film at 15, 16, while supplying heat along the die orifice by a plurality of contiguous heaters 13, each occupying not more than three inches of the die orifice length, and controlling the heat supplied by each heater by the magnitude of the signal generated by a thickness gauge operating at a corresponding point on the biaxially drawn film to maintain substantilly uniform the thickness of the biaxially stretched film at points across the width thereof corresponding to the heaters. As shown, the heat supplied by each heater is controlled by the magnitude of the signal generated by a traversing beta ray thickness gauge 17 operating at a corresponding point on the biaxially drawn film. The output of gauge 17 is transmitted ...

EXTRUSION OF PLASTICS MATERIALS

... 1471115 Extruding cellular polymers GENERAL ENG CO (RADCLIFFE) Ltd 4 April 1974 [11 April 1973] 17490/73 Heading B5A Cellular plastics or rubber material is extruded Fig. 1, by at least one non-positive displacement screw extruder 10 delivering through a feed pipe 12 to a positive displacement means 13, which meters the material and delivers it at the required pressure to an extrusion die 14, the extruder 10 comprising a vent V through which a fluid blowing medium is introduced into the material, and a pressure sensing means (23), Fig. 5 (not shown) located on the extruder between its outlet and the vent V. The vent V, operates at partially filled flights of the screw. The apparatus separates the compounding function of the screw from the function of generating pressure for extruding through the die. The positive displacement means may comprise a gear pump, or an intermeshing positive displacement multi-screw pump. The non-positive screw extruder may comprise a single screw, or a plurality ...

FORMING ARTICLES FROM PLASTIC MATERIAL

Improvements in Extrusion Methods and Apparatus, and Products Thereof

... 1,185,161. Extrusion; parison section control. H. V. SMITH. 31 May, 1967 [23 March, 1966], No. 12929/66. Heading B5A. The cross-sectional area of an extrudate is controlled by governing the pressure of material behind the die by control means responsive to displacement of a cam or templet and follower. These may co-operate to regulate a ram speed control device or by determining the rate of delivery of material to the die by a reciprocable screw. A programme may control the extrusion rate e.g. by controlling power operating means of the extruder. The extrudate may be a parison for blow-moulding e.g. of a bottle, being thickened at the point to be the junction of wall and base or the junction of wall and neck or both.

Introducing a deliberate thickness variation across the width of an extruding thermoplastic foil, to avoid a coiling build-up

The process for making a thermoplastic foil involves the use of a wide-outlet or long-slit die which has at least one outlet-gap-defining adjustable die lip, an opposing gap-bounding lip and a group of piezotranslators distributed over the length of the outlet-gap-defining adjustable die lip, each of which is part of a control loop, acts as a positioning member and is associated with an individual section of an outlet-gap-defining adjustable die lip. At least one actual value of the foil thickness of the thermoplastic foil formed is measured with a measuring device and is fed to a controlling processor. Each of the piezotranslators is controlled by a controlling processor with a controlling variable. In the controlling processor a distribution control variable which is generated by a thickness variation or error is generated by a control variable deviating from a setpoint value and the distribution control variable is fed to individual piezotranslators from the controlling processor according ...

EXTRUSION MOULDING TOOL UNIT FOR SYNTHETIC THERMOPLASTIC MATERIALS

A die for a thermoplastic material with at least one output-gap-defining adjustable die lip, an opposing gap-bounding lip, at least one adjusting element working on the output-gap-defining die lip as well as a control and adjusting device for the thickness of the extruded plastic product, wherein the adjusting element is associated with and operated at least partially by the control and adjusting device. A field translator, either a piezotranslator or a magnetostriction translator, is employed as the adjusting element.

Method and device for mixing or thermal homogenisation of at least one fluid

PROCESS AND APPARATUS FOR MOULDING THERMALLY CURABLE MATERIAL

"An Extruder head for applying a foamed plastic insulation to telephone wires"

The invention concerns an extruder head for regulating the temperature of a flow of molten plastic containing a foaming agent. In the flow passage of the extruder head is arranged a mixer which is inductively heated and transfers heat to the plastic flow thereby regulating the temperature thereof during the passage through the extruder head.

A method and apparatus for reducing wastage during start-up of a multiple-head extrusion device

A method of reducing wastage during the start-up phase of an extrusion device used to produce extruded profiles such as tread strips for vehicle tires from a plurality of mixtures is disclosed. The extrusion device comprises a plurality of extruders each extruding a component of the profile and each extruder has its own drive means. The outlets from the extruders communicate with a template member having flow channels formed therein which lead into a common extrusion port. The drive means are actuated simultaneously and the pressure of each of the components is monitored in the outlet region of each extruder. These pressures are compared with a pre-determined desired pressure by a control device, which device switches-off the appropriate drive means as each desired pressure is attained. When all desired pressures have been attained, all of the drive means are re-actuated simultaneously by the control device. In a minor modification of the method, the drive means for the final extruder to ...

Improved method and apparatus for longitudinal orientation of a tubular thermoplastic film in molten or semimolten state

Rheometry

Method and apparatus for forming inner liners for the fabrication of vehicle tires

In one working operation or in directly successive working operations a tube 2 is extruded having at least two layers of different materials and the wall thickness thereof is structured to be wave-shaped or undulatory, i.e. has thick portions and thin portions at intervals. The thus formed tube sections are then cut from the tube to form the individual inner liners 50. The periodic variation in wall thickness is obtained either by altering the infeed of at least one material, or by constricting the flow passage through the extrusion head, or by changing the withdrawal speed of the tube. The materials are preferably two different rubbers. ...

METHOD OF FORMING A FOAM-SKIN INSULATION ON TELEPHONE WIRES AND AN APPARATUS FOR PERFORMING THE METHOD

HOT VISCOUS RAW MATERIAL LEAVING A COOLER PERFORATED BODY COOLING A CUTTER

Improvements in or relating to extrusion

NOZZLE FOR EXTRUDING A PROFILED POLYURETHANE BEAD

CONTROLLING DYNAMIC INSTABILITY

Extruder roller die machines

A screw 30 feeds material to the rolls 16, 18, of the machine, which are mounted for movement along planes which are oblique to one another and to a centre plane X, of the machine to give improved force distribution to the frame 50 of the machine and to give ready access to the machine for cleaning purposes. The planes of movement may be at angles A, B of 15 DEG to 60 DEG to a plane perpendicular to the plane X. The movement is effected by the roll bearings 58, being displaceable along slots 60 of the frame 50, by hydraulic cylinders 62 which also act to determine the nip between the rolls 16, 18. A sensor 75 may act to control the speed of the rolls 16, 18, or of the extruder screw 30, or the size of the roll nip by regulating the hydraulic pressure of cylinders 62, or the heat transfer of the rolls 16, 18, or of the extruder die 46. ...

Improvements relating to extrusion presses

... 793,497. Extrusion-machines. LONZAWERKE ELEKTROCHEMISCHE FABRIKEN GES. June 7, 1956 [June 8, 1955], No. 17618/56. Class 87(2). In an extrusion-machine having a pressing worm 3, Fig. 1, and a heated die head 1 a spring- loaded valve 7 is placed in the die head and is opened only when a certain pressure exists in in the chamber 4 behind the valve. When this pressure exists the plate springs 9 yield and the valve moves to the open position shown. The purpose of the valve is to keep a high pressure in the screw chamber 2, this high pressure resulting in a reverse " leak flow " of plasticized material back towards the hopper 2a, and this flow carries air bubbles back with it. Fig. 2 shows apparatus for extruding tubes, the core 22 being urged downwardly by springs 9 and upwardly by the pressure existing in space 4a. When the core rises an outlet gap 25 is formed between the lower face 7a of the core and the die body 21. Air may be blown into the extruded tube, through hollow core stem 23, to ...

Method and apparatus for extruding plastic material to reduce the volatiles content

... 903,517. Automatic control systems for extrusion-drying machines. PHILLIPS PETROLEUM CO. June 21, 1960 [July 9, 1959], No. 21697/60. Drawings to Specification. Class 38 (4). [Also in Group V] In an automatic control system for an extrusion drying machine, for reducing the volatiles content of a plastic material, the position of a block determining the pressure applied to the material being masticated between feed screws, is controlled in dependence on the electrical power supplied to a motor driving the feed screws and the temperature of the material after treatment. The temperature of the plastic material is determined by an iron-constantan or copper-constantan thermocouple and an error signal representative of temperature deviation from a desired value is fed to a recorder-controller to vary the magnitude of a reference signal to which the electrical power is controlled. The electrical power to the motor is measured by a wattmeter and a power signal is compared with the reference signal ...

Recycled thermoplastic processing plant comprises two evacuated mixing vessels with temperature sensors, an inlet side vacuum sluice and an outlet to an extruder

Two vacuum-connected processing vessels are connected and have rotating tools for mixing and warming material. A material inlet (19) of the first vessel (1) is connected to a sluice (6). Tools rotate in both vessels and (19) is above the uppermost tools in (1). An outlet (49) from the second vessel (2) leads to an extruder (62). Temperature sensors (32) are located on each tool plane. A recycled thermoplastic processing plant comprises two vacuum-connected processing vessels connected to each other and having tools rotating around vertical axes for mixing and warming material. A material inlet (19) of the first vessel (1) is connected to a sluice (6). Tools rotate in several planes one above the other in both vessels and the inlet is above the uppermost tools in the first container. An outlet (49) from the second vessel (2) leads to an extruder (62) and is at the level of the lowest tools in the latter. A temperature sensor(32) is located on each tool plane in both vessels.

PROCEDURE FOR THE ADJUSTMENT OF AN EXTRUDING TOOL TO AN EXTRUSION

PROCEDURE AND DEVICE FOR THE PRODUCTION OF DOUBLE-WALLED PIPES FROM THERMOPLASTIC ONE KUSTSTOFF WITH RING OR SCREW-SHAPED OF GERILLTER EXTERNAL WALL AND SMOOTH INNER WALL

BLOWING DEVICE FOR MAKING HOLLOW BODIES OF THERMOPLASTIC PLASTIC

PROCEDURE AND DEVICE FOR EXTRUDING A CONTINUOUS MOLDED ARTICLE

PROCEDURE FOR THE PRODUCTION GESCH UMTER POLYMERFORMK RPER AND GESCH UMTER POLYMERFORMK RPER

DEVICE FOR THE PROCESSING OF THERMOPLASTIC PLASTIC MATERIAL

PROCEDURE FOR BLAST PIPES OF HOHLKORPERN FROM THERMOPLASTIC PLASTIC

PROCEDURE AND DEVICE FOR THE REGULATION OF THE THICKNESS PROFILE DURING THE BLOWING FOIL PRODUCTION

METHOD FOR THE AUTOMATIC, CONTINUOUS PRODUCTION OF CHEWING RUBBER

EINSTELLBARER STRANGPRESSKOPF ZUM REGELN DER WANDSTAERKE VON AUS THERMOPLASTISCHEM KUNSTSTOFF GEBILDETEN HOHLKOERPERN

BLOWING FOIL PLANT AS WELL AS PROCEDURE FOR THE ENTERPRISE THE SAME

FOILS WITH HIGH ULTIMATE TENSILE STRENGTH FROM HAFNOCENKATALYSIERTEN POLYETHYLENES

DEVICE TO THE FOIL EXTRUSION

PROCEDURE FOR THE PRODUCTION AND SHROUD OF PLASTIC TUBES OR METAL TUBES

ORDER NOZZLE WITH EXPANDABLE CHAMBER DEVICE

VORRICHTUNG ZUM HERSTELLEN VON HOHLKOERPERN AUS THERMOPLASTISCHEM KUNSTSTOFF

VERFAHREN UND VORRICHTUNG ZUM MISCHEN ODER THERMISCHEN HOMOGENISIEREN VON ZUMINDEST EINEM FLUID

PROCEDURE FOR THE PRODUCTION OF A EINODER MULTILEVEL ONE EXPAND-CASH FOIL

Verfahren und Vorrichtung zum Herstellen eines Strangpress-Profils aus nachwachsenden Rohstoffen

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Herstellen eines Strangpress-Profils (1) aus Fasern nachwachsender Rohstoffe, wobei die Fasern in einer Aufbereitungseinheit (6) mit Zusatzstoffen zu einem pastösen Faserfluid gemischt werden, umfassend in einer ersten Phase zum Erzeugen eines segmentierten Kerns (3) für das Profil (1): Versetzen eines in einer ersten Pressform (9) verschieblichen Kolbens (12) in eine erste, zurückgezogene Stellung, Einpressen von Faserfluid in die erste Pressform (9) als Fasersegment, Zurückziehen des Kolbens (12) entgegen der Strangpressrichtung von der ersten in eine zweite, weiter zurückgezogene Stellung, Ausfüllen des in der ersten Pressform (9) zwischen Fasersegment und Kolben (12) verbleibenden Raumes mit Füllstoff als Füllstoffsegment und Aushärtenlassen des Füllstoffsegments; und in einer zweiten Phase zum Erzeugen eines Mantels (2) um den Kern (3): Vorschieben des Kolbens (12) in Strangpressrichtung von der zweiten in eine dritte Stellung ...

DEVICE FOR MANUFACTURING HOLLOW BODIES FROM THERMOPLASTIC PLASTIC BY FORM BLISTERS

EXTRUDING TOOL FOR THE PRODUCTION OF A FROM OF PLASTIC MASS EXISTENCE CYLINDRICAL K RPERS

EXTRUSIONSDÜSE

GRANULIERVORRICHTUNG UND GRANULIERLOCHPLATTE

The invention relates to a granulation die (5, 15), for arrangement on a device (1), for the granulation of materials with thermoplastic properties, in particular, thermoplastic plastics, comprising several melt channels (3), embodied as through openings which are individually or collectively at least partly surrounded by temperature control elements (11, 21). The temperature control elements can be embodied as heating or cooling elements which permit the targeted congealing, or holding open of individual melt channels.

EXTRUSION WITH A DEVICE FOR COATING AT LEAST TWO CORES WITH A HOMOGENOUS MATERIAL AND COATING PROCESS

PROCEDURE FOR THE WEIGHT-DEPENDENT REGULATION OF THE BASIC GAP AT EXTRUDING BLOWING MACHINES.

PROCEDURE AND DEVICE FOR THE EXTRUSION OF PLASTIC TUBES WITH REGULATION OF THE WALL THICKNESS.

PROCEDURE FOR THE PRODUCTION OF FOILS, IN PARTICULAR ON THE BASIS OF POLYVINYL BUTYRAL WITH SMALL SURFACE TACKNESS.

PROCEDURE AND DEVICE FOR CONSTANT STOPS OF THE WALL THICKNESS WHEN EXTRUDING BLASFOLIEN, PIPES OR TUBULAR STRANDS FROM PLASTIC.

RULE PROCEDURE OF CERTAIN PARAMETERS IN CONNECTION WITH THE PRODUCTION OF PLASTIC ARTICLES.

MORE KOEXTRUSIONSADAPTER.

EXTRUDING HEAD.

NOZZLE FOR A MULTILEVEL ELEMENT WITH ADJUSTABLE COLUMNS.

EXTRUDING NOZZLE FOR THE PRODUCTION OF HOLLOW CHAMBER PLATES.

PROCEDURE AND DEVICE FOR MAKING A VORFORMLINGES OF THERMOPLASTIC PLASTIC MEANS OF AN EXTRUSION.

PROCEDURE FOR THE CONTROL MEMBER IDENTIFICATION DURING THE TRANSVERSE PROFILE REGULATION OF A CONTINUOUSLY PRODUCED MATERIALBAHN

LONGITUDINAL ORIENTATION OF SCHLAUCHFOLIEN FROM THERMOPLASTIC PLASTIC

Device for regulating the temperatures of an electrically heatable cylinder of a Schneckenplastiziervorrichtung

DEVICE AND PROCEDURE FOR THE PRODUCTION OF PLASTIC TUBES

PROCEDURE FOR THE EXTRUSION OF SHAPED PARTS ON PLATTENFÖRMIGE ARTICLES

EXTRUDING DEVICE WITH SEAL-CASH CHAMBER AND PROCEDURE FOR THE CONTROLLING OF THE POETRY

PROCEDURE FOR BLAST PIPES OF HOLLOW BODIES FROM THERMOPLASTIC PLASTIC

MIKROZELLULARES FOAM MATERIAL EXTRUDING/CBLAST PIPE PROCEDURE AND THEREBY MANUFACTURED ARTICLE

EQUIPMENT AND PROCEDURE FOR THE EVEN DOSAGE BY A MULTIPLE NOZZLE SYSTEM OF MEANS OF POSITIVE DISPLACEMENT

ELECTROMECHANICAL DRIVE SYSTEM FOR MEMORY HEADS

PROCEDURE FOR STEERING A BLAST PIPE PLANT

Method for building three-dimensional models with extrusion-based additive manufacturing systems

A method for building a three-dimensional model with an extrusion-based additive manufacturing system having an extrusion head, the method comprising depositing a consumable material from a liquefier assembly at an extrusion rate to substantially normalize a meniscus height within the liquefier assembly.

Extruder and roller-die combination

An apparatus forms an elastomeric strip. The apparatus includes a roller and an adjustable surface. The roller has a cylindrical surface. The roller rotates at a predetermined angular velocity. The adjustable surface confronts the cylindrical surface and has a first stationary position relative to the cylindrical surface such that the apparatus forms an elastomeric strip having a first thickness. The adjustable surface is adjustably pivotable relative to the cylindrical surface such that the adjustable surface moves to a second stationary position for forming an elastomeric strip having a second thickness.

Laminated and molded body and manufacturing method therefor

A laminated and molded body obtained by coextruding and molding at least two kinds of resin materials is preferable as a blow-molding aimed preform, a direct-blow molded bottle, a tube, or a blow molded tube, and has at least one layer constituted of a colored layer having a thickness continuously or intermittently varied in a direction parallel to the extruding direction of the at least one layer and/or in another direction intersecting the extruding direction, thereby enhancing the gradation effect.

Extrusion process and device for producing elastomeric compounds

An extrusion device for producing elastomeric compounds, includes a holding body internally confining a chamber and at least one extrusion screw disposed in the chamber. The device further includes a plurality of interchangeable extrusion heads alternatively installed on the holding body at a discharge opening of the chamber. The choice of using a type of head rather than another or leaving the discharge opening free is carried out based on the physico-chemical features of the elastomeric compound to be treated, so as to maintain the temperature and/or pressure of the outgoing compound under critical threshold values for such a compound.

Apparatus for the Continuous Production of a Twin Wall Pipe with an Integral Socket

An apparatus for the continuous production of a twin wall pipe has mold block halves supplied in pairs to form a mould, and a pipe head, which has an external nozzle for the extrusion of an external hose and an internal nozzle for the extrusion of an internal hose. A support air and venting channel which is annular-cylindrical and concentric with respect to the centre longitudinal axis of the pipe head opens out between the external nozzle and internal nozzle.

Metered pump system for hydrocapsule encapsulation

A metered pump system for hydrocapsule encapsulation is disclosed. In at least one embodiment, a system for hydrocapsule encapsulation includes a nozzle assembly and metered pump for encapsulating discrete droplets of liquid by generating a continuous coating of a polymerizable liquid which is substantially immiscible with the core liquid. The metered pump system is configured to control a stroke length and a pulsation speed to attain constant shear with each pump of water, and a volume of water in each stroke and a speed of the stroke is controlled. In at least one embodiment, the nozzle includes a material feed port, a polymer feed port, a water feed port, and an encapsulated material exit port. In at least one embodiment, the metered pump is configured for use in a hydrocapsule encapsulation system having a pressure control system, a water control system, sparging column, and ultraviolet exposure chamber system.

Polymer pelletization via melt fracture

Polymer pellets are formed using air to influence the separation of polymer from a polymer melt. In accordance with one or more embodiments, a polymer material is extruded through a nozzle to form a polymer melt extending from the nozzle. A non-uniform thickness is generated in the polymer melt using a gas or gasses to apply a drag force to the polymer melt. This drag force reduces a thickness of a portion of the polymer melt adjacent the nozzle, and the polymer melt is fractured into discrete droplets at the reduced thickness. The discrete droplets are then solidified to form pellets.

Method and device for controlling the temperature of polymer melt

A method for controlling the temperature of a polymer melt in an extrusion tool includes flowing the polymer melt via at least one flow channel from an input to an output and around at least one temperature-control element in the at least one flow channel. The temperature control element includes a plurality of temperature control units. The temperature of the polymer melt flowing around the temperature-control element is controlled by individually controlling each of the temperature-control units so as to vary a degree of temperature control of the temperature-control element such that a degree of temperature control is controllable to be the same or different at locations throughout the temperature control-element.

Extruder and method for extruding cord reinforced tire components

Disclosed is an extruder and a method for extruding cord reinforced tire components, wherein the extruder includes an extruder head with a die and a cord guide, wherein the die is provided with a cross sectional profile that defines a first cross section of the extrusion material in the die, wherein the cross sectional profile has a profile height, wherein the cord guide is arranged for guiding the cords into the die at a cord entry height, wherein the extruder head is provided with first heating elements, wherein the extruder comprises a control unit that is operationally connected to the first heating elements for generating an adjustable height temperature gradient in the extrusion material across the profile height to control swelling of the extrusion material relative to the cord entry height from the first cross section to a second cross section after the extrusion material leaves the die. 1. An extruder with an extruder head for extruding cord reinforced tire components , wherein the extruder head comprises a die for receiving an extrusion material and a cord guide for guiding cords into the die so that in use the cords are embedded in the extrusion material , wherein the die is provided with an elongate cross sectional profile that defines a first cross section of the extrusion material in the die , wherein the cross sectional profile has a profile width and a profile height that is relatively small with respect to the profile width , wherein the cord guide is arranged for guiding the cords into the die at a cord entry height with respect to the profile height , wherein the extruder head is provided with one or more first heating elements which are arranged to transfer heat into the extrusion material from a first side of the profile height , wherein the extruder further comprises a control unit that is operationally connected to the one or more first heating elements for generating an adjustable height temperature gradient in the extrusion material across ...

FILM, FILM MANUFACTURING METHOD, LAMINATED BODY, AND PACKAGING MATERIAL

To provide a film made of polychlorotrifluoroethylene (PCTFE), of which a laminate with other layer is less likely to curl when subjected to drawing. 1. A film comprising polychlorotrifluoroethylene ,having thermal shrinkage rates within ±1.2% in MD and in TD when heated at 140° C. for 30 minutes and then cooled to 25° C., based on the dimension at 25° C.2. The film according to claim 1 , which has a haze per thickness 100 μm of from 3 to 20%.3. The film according to claim 1 , which has a water vapor transmission rate of at most 0.07 g/(m·day) per thickness 100 μm at 37.8° C. under a relative humidity of 100%.4. The film according to claim 1 , which has tensile elongations in MD and in TD at 23° C. of respectively at least 30%.5. A process for producing a film claim 1 , which comprise melting a resin material containing polychlorotrifluoroethylene and extruding it into a film from an extrusion die claim 1 , and bringing the extruded product into contact with at least one casting roll to form a film claim 1 ,wherein before the extruded product is brought into contact with the at least one casting roll, the surface temperature of the extruded product is adjusted to be less than 170° C.6. The process for producing a film according to claim 5 , wherein before the extruded product is brought into contact with the at least one casting roll claim 5 , air in a laminar follow is made to blow on the extruded product by an air knife.7. The process for producing a film according to claim 5 , wherein the distance from the outlet of the extrusion die to the contact point where the extruded product is brought into contact with the at least one casting roll for the first time claim 5 , is from 80 to 1 claim 5 ,000 mm.8. The process for producing a film according to claim 6 , wherein the distance from the outlet of the extrusion die to the contact point where the extruded product is brought into contact with the at least one casting roll for the first time claim 6 , is from 80 to ...

Systems and methods for making composite structures

A system for depositing a composite filler material into a channel of a composite structure includes an end-effector configured to extrude a bead of the filler material into the channel. The filler material can comprise a first group of relatively long fibers, a second group of relatively short fibers and a resin. A drive system is configured to move the end-effector relative to the channel, and a position sensor is configured to detect the position of the bead relative to the channel. A controller is configured to operate the drive system in response to the detected position and to operate the end-effector to heat and compress the filler material so as to orient the longer fibers in a substantially longitudinal direction relative to the channel and the shorter fibers in substantially random directions relative to the channel when the bead is extruded into the channel.

Extrusion device for the processing of plastics, which can be coupled to systems for supplying thermosetting and thermoplastic polymers

A group of hollow modules through which the material to be extruded flows, is provided that includes at least: a rectangular heating-shaping module (6), in which the material undergoes a temperature increase and takes on the desired shape; and a tubular cooling-solidification module (8), in which the material, which has taken on the desired shape, changes from liquid to solid with said shape. A heating-reaction module (2) is provided upstream of module (6). The heating-reaction module (2) includes an interchangeable hollow tube (3) with an external heating system (4). The heating-shaping module (6) includes detachable parts (7) and includes another external heating system (4) based on the auto-acceleration of the curing reaction and of the heat supply from said system (4). The tubular portion between module (2) and module (6) includes a shaping coupling (5) equipped with a through-hole. The extrusion module includes a circuit through which the polymer flows into at least two push compartments (20).

Apparatus And Method For Providing Marks On Extruded Films

The invention relates to an apparatus for providing marks on extruded films, in particular on stretched films, which are exiting an extrusion lip of a film extruder and a respective method. The apparatus comprises at least one nozzle means for directing a gas stream, preferably an air stream to a surface of the film exiting the extrusion lip of the film extruder, wherein the nozzle means are configured and arranged in such a manner that the gas stream locally causes a cooling of the extruded film to create a local mark (FIG. 1 ).

Method for manufacturing resin film for thin film-capacitor and the film therefor

The present invention provides a resin film for a film capacitor making it possible to obtain the excellent heat resistance, materialize a reduction in a size of the film capacitor and an increase in a capacity thereof and satisfy a reduction in a thickness of the film and a high voltage resistance thereof. In a manufacturing method in which an extruding equipment 10 is charged with a molding material 1 to extrude a film 2 for a film capacitor from a T die 20, in which the above extruded film 2 for a film capacitor is interposed between plural rolls in a receiving device 30 and cooled and in which the above cooled film 2 for a film capacitor is wound on a winding tube 42 of a winding device 40 , 100 parts by mass of a polyetherimide resin is blended with 1 to 10 parts by mass of a fluorocarbon resin to prepare the molding material 1; the above molding material 1 is extruded through a filter 50 having apertures 51 which are 0.5 to 6 times or less as large as an average thickness of the film. 2 for a film capacitor, which is provided between the extruding equipment 10 and the T die 20; and a thickness of the film 2 for a film capacitor is controlled to 10 pm or less.

Resin-film manufacturing apparatus and its control method

In a resin-film manufacturing apparatus of an embodiment, when a lip gap control is started, a difference between a state of a target heat bolt (THB) at a start of current control and a state of each of all the heat bolts at a start of last control is obtained, when the difference between the states of THB at the starts of the current and last control is a smallest one, a learning result of THB is set as an initial value of a control condition for THB, and when the difference between the states of THB is not the smallest one, either one of a learning result of the heat bolt of which the difference between the states is smaller than the difference between the states of THB and the learning result of THB is set as the initial value of the control condition for THB.

Nozzle for extruding a preform tube

An extrusion nozzle for making tubular preforms has a mandrel extending along a vertical axis, an annular and stationary nozzle body spacedly radially surrounding the mandrel, and a holding ring having an upper end axially slidable in the nozzle body, braced axially downwardly against the nozzle body, and having a lower end spaced radially inward from shiftable limitedly radially relative to the nozzle body. A nozzle ring has an upper end axially slidable in the holding ring, is braced axially downwardly against the nozzle body, and has a radially deflectable lower end forming an annular extrusion gap with the mandrel. A first positioner engages the lower end of nozzle ring and is operable to radially deflect this lower end. A second positioner engages radially with the lower end of the holding ring or with the nozzle ring for radially deflecting same.

Enhancing die flatness

Methods and apparatus for enhancing the flatness of a die by applying adhesive to a shim having a selected flatness, rotating the shim to spread the adhesive to a layer having a uniform thickness, evacuating a chamber to create a vacuum; manipulating a die onto the adhesive layer in the chamber; and reducing a level of the vacuum to pressure the die onto the adhesive layer such that the bow in the die is reduced as the die conforms to the shim.

Print head for additive manufacturing system

A system is disclosed for additively manufacturing a composite structure. The system may include a support, and a print head operatively connected to and moveable by the support. The print head may include a supply of continuous reinforcement, an outlet configured to discharge the continuous reinforcement, and a tensioning module disposed between the supply and outlet. The tensioning module may be configured to generate a signal indicative of a tension in the continuous reinforcement. The system may also include a processor programmed to selectively cause the supply to dispense the continuous reinforcement based on the signal.

PRINT HEAD FOR ADDITIVE MANUFACTURING SYSTEM

A system is disclosed for additively manufacturing a composite structure. The system may include a support, and a print head operatively connected to and moveable by the support. The print head may include an outlet configured to discharge a material in a trajectory along a central axis of the outlet; a compactor disposed downstream of the outlet relative to the trajectory and configured to press the material transversely against an adjacent surface, and a cutting module located between the outlet and the compactor. The compactor and the cutting module may be configured to move together relative to the outlet. 1. An additive manufacturing system , comprising:a support; and an outlet configured to discharge a material in a trajectory along a central axis of the outlet;', 'a compactor disposed downstream of the outlet relative to the trajectory and configured to press the material transversely against an adjacent surface; and', 'a cutting module located between the outlet and the compactor,, 'a print head operatively connected to and moveable by the support, the print head includingwherein the compactor and the cutting module are configured to move together relative to the outlet.2. The additive manufacturing system of claim 1 , wherein a movement direction of the compactor and the cutting module is towards and away from the material discharging from the outlet.3. The additive manufacturing system of claim 1 , wherein the cutting module is configured to additionally move relative to the compactor.4. The additive manufacturing system of claim 3 , further including a controller programmed to cause the cutting module and the compactor to move.5. The additive manufacturing system of claim 4 , wherein the controller is programmed to cause the cutting module and the compactor to move together during a starting event when the cutting module is retracted.6. The additive manufacturing system of claim 5 , wherein the controller is programmed to cause the cutting module to ...

Flow controlled strand die

An extrusion die is used for the simultaneous extrusion of multiple strands of extrusion material at the same flow rate. The extrusion die includes a mounting flange having an inlet cavity with an inlet orifice at one end for receiving extrusion material from an extruder. The extrusion die also includes a valve body including at least one adjustment hole, and a channel body arranged between the mounting flange and the valve body. The channel body defines at least one channel extending therethrough to provide fluid communication for the extrusion material between the inlet cavity and at least one outlet passageway provided in the valve body and respectively corresponding to the at least one adjustment hole. Additionally, a flow control gate is received in each adjustment hole to externally control the flow velocity of the extrusion material through the outlet passageway before it exits the die. Additionally, the flow control gate allows a user to adjust flow rate variations caused by temperature changes across the die.

Polymer-based arterial hemangioma embolization device, manufacturing method and application of same

A polymer-based embolization device comprises a helix constructed by a linear structure. The linear structure is either a fibrous structure or composed of an A structure ( 1 ) and a B structure ( 2 ), wherein the A structure ( 1 ) is a protrusion on the linear structure and the B structure ( 2 ) is a pillar-shaped structure positioned between two A structures ( 1 ) for connecting the two A structures ( 1 ). The embolization device adopts a linear structural design and is integrally manufactured using a polymer material via a four-axis rapid forming system or via a compression method, thereby addressing issues of generation of image artifacts during CT and magnetic resonance imaging. The combination of design, material, and technique of the invention provides the device with improved flexibility and embolus formation, and can satisfy different clinical requirements. When a biodegradable macromolecular material is selected for manufacturing, blood vessel obstruction caused by implant degrading can be avoided, allowing the blood vessel to return to a normal structural state.

Filament for fused deposit modeling

An apparatus for forming an object by an additive process, commonly referred to as 3-D printing, is provided. The apparatus includes a filament comprising a series of irregularities along the length of the filament, a nozzle depositing a layer of melted material onto a surface and a feeder feeding the filament to the nozzle. A heating element melts the filament and a controller controls the position of the nozzle in a plane to control the configuration of the layer of melted material deposited by the nozzle. Additionally, a method for forming polymer filament used in 3-D printing devices is also provided. The method includes the steps of melting a polymer, selecting an extrusion characteristic calculated to induce a polymer flow instability and extruding the melted polymer using the selected extrusion characteristic to produce an extrusion having distortions created by the polymer flow instability.

Extruder Feed System

Extruder feed system. The system includes a pair of spaced-apart, internally and oppositely threaded rotatable elements for receiving and engaging a plastic filament material. An electric motor rotates the rotatable elements in opposite directions thereby to drive the filament into a liquefier chamber for subsequent discharge through a nozzle. The system provides very accurate layer-by-layer build up.

Automated mapping system for controlling parameters of polymeric melt

A system for controlling parameters of polymeric film includes an extruder and a die which has a gap. A plurality of regulators are positioned along the die for regulating the gap. A cooling cylinder is located downstream of the die and a polymeric melt extends from the die to the cooling cylinder. An applicator device for creating a tracking lane in the polymeric melt is located proximate the gap. A sensor system is located downstream from the gap in a measuring location. The sensor system locates a transverse point for the respective tracking lane in the polymeric film at the measuring location. The sensor system is in communication with the regulators to adjust the gap based on a correlation of tracking lane position at origin point and transverse point at the measuring location.

Polymer pelletization via melt fracture

Polymer pellets are formed using air to influence the separation of polymer from a polymer melt. In accordance with one or more embodiments, a polymer material is extruded through a nozzle to form a polymer melt extending from the nozzle. A non-uniform thickness is generated in the polymer melt using a gas or gasses to apply a drag force to the polymer melt. This drag force reduces a thickness of a portion of the polymer melt adjacent the nozzle, and the polymer melt is fractured into discrete droplets at the reduced thickness. The discrete droplets are then solidified to form pellets.

Material Dispensing System

Additive manufacturing systems and apparatus include, in one aspect, a material deposition system including an extruder for deposition materials, the extruder including two or more material entry ports, a mixing chamber, and an exit orifice; and a controller coupled with the extruder to dynamically change delivery rates of the deposition materials to be mixed in the mixing chamber before flowing from the exit orifice; wherein the controller combines a desired volume flow rate of material to flow from the exit orifice with a mix ratio to specify the delivery rates of the deposition materials. The system can include filament drive systems to feed the thermoplastic materials in filament form into the entry ports, and the controller can dynamically change the mix ratio when operating the filament drive systems to control one or more properties of the material to flow from the exit orifice.

Purge wall for three-dimensional printing

Multi-material, three-dimensional fabrication is improved by the use of a purge wall adjacent to an object to absorb transitional artifacts of material changes. The structure of the purge wall may be selected to reduce build time, and to reduce certain printing artifacts such as warping and delaminating. For example, alternating layers of offset or mirrored zigzag patterns may be used to reduce and distribute the layer-to-layer adhesion surfaces throughout the purge wall while providing sufficient contact points to maintain the structural integrity of the purge wall.

Method for Manufacturing a Polymer Article

A method enabling the selection, modification and/or creation of polymer materials which can provide improved response to the application of local shear and/or extensional deformation inside the polymer melt in manufacturing technologies including injection molding, injection stretch blow molding, direct injection, extrusion blow molding, sheet extrusion, thermoforming, etc., is provided. A method for manufacturing a polymer article includes injecting or extruding molten polypropylene, polyethylene or polyester based polymer for converting it into semi-final shape while applying shear and/or extensional deformation on the polymer melt. Applying shear and/or extensional deformation on the polymer melt includes selectively modifying the flow path of the molten semi-crystallizable polymer as a function of local pressure profile over at least part of the flow path. Local pressure profile is a function of optimized response of the polymer melt to the applied local shear and/or extensional deformation over at least the part of the flow path.

Molded article having excellent fuel barrier properties

The molded article includes a resin composition with a single shaft extruder, in which the resin composition is generated by melting and mixing a raw mixture, the raw mixture being obtained by blending 40-90 parts by mass of the polyolefin (A), 3-30 parts by mass of the metaxylylene group-containing polyamide (B), and 3-50 parts by mass of the modified polyolefin (C). In the single shaft extruder, the ratio of the length of the feeding part to the screw effective length is 0.40-0.55, the ratio of the length of the compressing part to the screw effective length is 0.10-0.30, the ratio of the length of the measuring part to the screw effective length is 0.10-0.40, the upper limit of the temperature of the feeding part falls within the range of +20° C. from the melting point of the metaxylylene group-containing polyamide or less, and the temperatures of the compressing part and the measuring part fall within the range of −30° C. to +20° C. from the melting point of the metaxylylene group-containing polyamide, and the shear rate is 14/second or more.

Metal-resin composite pipe that can be easily wound into ring shape and, methods for manufacturing the same

The present invention may manufacture a composite pipe by forming an adhesive layer and a resin layer on an outer surface of a metal pipe, and although the composite pipe is wound in a ring shape after the composite pipe is manufactured, a circular cross sectional shape may be maintained without deformation, and after the composite pipe is straightened for the purpose of construction, separation or buckling may be prevented, resulting in excellent transportability and constructability of a product.

Nozzle for sheet or film extrusion

A die and a method for producing a structural part from hardenable material by way of a die. The die includes a die bottom part; a die top part; a die control unit; a flexible element extending along a lower edge of the die top part; and at least one adjusting bolt to adjust at least partially, via the die control unit, a spatial distance between the flexible element and the die bottom part during extrusion.

EXTRUDING CONNECTED HOLLOW STRANDS

A web. The web includes an array of discrete polymeric tubes; a plurality of spacer segments between at least a plurality of adjacent polymeric tubes; wherein polymeric tubes are hollow polymeric tubes; wherein the web is a continuous web. 1. A web comprising ,an array of discrete polymeric tubes; anda plurality of spacer segments between at least a plurality of adjacent polymeric tubes;wherein polymeric tubes are hollow polymeric tubes;wherein the web is a continuous web; andwherein the tubes are within the two or more planes.2. The web of claim 2 , wherein the web has a thickness up to 750 micrometers.3. The web of claim 1 , wherein the web is an extruded web.4. The web of claim 1 , wherein the tubes have a hollow cross-sectional area in a range from 0.2 to 1 mm.5. The web of claim 1 , wherein the tubes have a tube wall thickness in a range from 0.025 to 0.25 mm.6. The web of claim 1 , wherein the tubes have an average cross-sectional diameter in a range from 0.05 to 2 mm.7. The web of claim 1 , wherein the spacer segments have a length in a range from 0.025 to 2 mm.8. The web of claim 1 , further comprising a gas or liquid in at least some of the tubes.9. The web of claim 1 , further comprising thermally conductive material in at least some of the tubes.10. The web of claim 1 , wherein the tubes extends substantially in a down-web direction.11. A method of making the web of claim 1 , the method comprising:providing an extrusion die comprising a plurality of shims positioned adjacent to one another, the shims together defining at least a first cavity, a second cavity, and a third cavity, and a dispensing surface, wherein the dispensing surface has an array of alternating dispensing orifices, wherein the plurality of shims comprises a plurality of a repeating sequence of shims, wherein the repeating sequence comprises: shims that provide a fluid passageway between the second cavity and a second plurality of orifices, and shims that provide a fluid passageway ...

A process for the preparation of tpu alloy by in-situ reactive compatibility technology

A process for preparing a TPU alloy material through in-situ compatibilization includes: 1) adding a premixed TPU raw material to a feeding port of a twin-screw extruder; injecting a mixture of an alloy component and a dual-active substance into the twin-screw extruder through a lateral feeding port; adding an auxiliary reagent to the TPU raw material or the mixture of the alloy component and the dual-active substance, wherein the alloy component is a polyolefin or a thermoplastic polymer material having reactivity, wherein the dual-active substance is a substance containing a group reactive with the TPU raw material and a group reactive with the alloy component, and the auxiliary reagent includes an initiator; 2) controlling a temperature of a reaction zone of the twin-screw extruder at 50° C. to 250° C., and granulating an extruded material by underwater cutting; and 3) drying the granulated product to obtain the TPU alloy material.

Systems and methods for making composite structures

A system for depositing a composite filler material into a channel of a composite structure includes an end-effector configured to extrude a bead of the filler material into the channel. The filler material can comprise a first group of relatively long fibers, a second group of relatively short fibers and a resin. A drive system is configured to move the end-effector relative to the channel, and a position sensor is configured to detect the position of the bead relative to the channel. A controller is configured to operate the drive system in response to the detected position and to operate the end-effector to heat and compress the filler material so as to orient the longer fibers in a substantially longitudinal direction relative to the channel and the shorter fibers in substantially random directions relative to the channel when the bead is extruded into the channel.

Hot viscous raw material leaving a cooler perforated body cooling a cutter

An embodiment of the invention relates to an apparatus for manufacturing particles, wherein the apparatus comprises a supply unit adapted for supplying a viscous raw material, a perforated body having a plurality of perforations and arranged to receive the viscous raw material from the supply unit to flow through the plurality of perforations, and a cutter arranged so that the viscous raw material flowing out of the plurality of perforations is cut into the particles by the cutter, wherein the apparatus is configured so that, during manufacturing the particles, a temperature of at least a portion of the perforated body is lower than a temperature of the viscous raw material flowing through the plurality of perforations, wherein the perforated body and the cutter are arranged relative to one another such that the cutter is cooled by thermal exchange with the perforated body during operation of the apparatus.

Method for Automatically Regulating the Size of a Slot of a Nozzle Assembly and Control and/or Regulation System

The invention relates to a method for automatically regulating the size of a nozzle discharge slot of a nozzle assembly, wherein the nozzle assembly comprises a first and a second nozzle lip and a nozzle discharge slot arranged between the nozzle lips for setting in a controlled manner a thickness profile of a conveyable melt. A plurality of adjusting elements, in particular a plurality of adjusting pins, coupled to a respective thermoelement, is arranged on the first nozzle lip, the thermoelements being controllable by the regulation in such a way that the slot can be adjusted by the action of a mechanical force from the respective adjusting element on the first nozzle lip, as a result of the expansion or contraction of the thermoelements. At least two adjusting elements are adjusted simultaneously. The invention further relates to a control and/or regulation system. 110-. (canceled)11. A method for automatically regulating the size of a nozzle discharge slot of a nozzle assembly , wherein the nozzle assembly comprises a first and a second nozzle lip and a nozzle discharge slot arranged between the nozzle lips for setting in a controlled manner a thickness profile of a conveyable melt , wherein a plurality of adjusting elements is arranged at the first nozzle lip , which are coupled to a respective thermoelement , wherein the thermoelements are controllable by the regulation in such a way that the slot adjustment can be realized by the action of a mechanical force from the respective adjusting element on the first nozzle lip as a result of an expansion or contraction of the thermoelements ,whereinat least two adjusting elements are adjusted simultaneously.12. The method according to claim 11 ,whereinall adjusting elements are adjusted simultaneously.13. The method according to claim 11 ,whereinthe adjusting elements are adjusted over an equal stroke, thus enabling parallel adjustment.14. The method according to claim 11 ,whereinthe adjusting elements are adjusted ...

Method for Automatically Regulating the Size of a Slot of a Nozzle Assembly and Control and/or Regulation System

The invention relates to a method for automatically regulating the size of a nozzle discharge slot of a nozzle assembly, wherein the nozzle assembly comprises a first and a second nozzle lip and a nozzle discharge slot arranged between the nozzle lips for setting in a controlled manner a thickness profile of a conveyable melt. A plurality of adjusting elements, in particular a plurality of adjusting pins, which are coupled to a respective thermoelement, is arranged at the first nozzle lip, wherein the thermoelements are controllable by the regulation in such a way that the slot adjustment can be realized by the action of a mechanical force from the respective adjusting element on the first nozzle lip as a result of an expansion or contraction of the thermoelements. An adjustment of the adjusting elements is carried out automatically based on measurement signals of at least one sensor, wherein the sensor is designed and/or arranged at the nozzle assembly in such a way that conclusions can be drawn about the thickness profile of the melt. The right-hand and left-hand edge region of the melt is monitored by means of the sensor and is controlled or regulated in such a way that the respective edge region is set by adjusting the adjusting elements depending on the material, in particular viscosity and/or viscoelasticity, and/or quality criteria and/or a conveying speed. The invention further relates to a control and/or regulation system. 113-. (canceled)14. A method for automatically regulating the size of a nozzle discharge slot of a nozzle assembly , wherein the nozzle assembly comprises a first and a second nozzle lip and a nozzle discharge slot arranged between the nozzle lips for setting in a controlled manner a thickness profile of a conveyable melt , wherein a plurality of adjusting elements is arranged at the first nozzle lip , which are coupled to a respective thermoelement , wherein the thermoelements are controllable by the regulation in such a way that the ...

Method for Automatically Regulating the Size of a Slot of a Nozzle Assembly and Control and/or Regulation System

The invention relates to a method for automatically regulating the size of a nozzle discharge slot of a nozzle assembly, wherein the nozzle assembly comprises a first and a second nozzle lip and a nozzle discharge slot arranged between the nozzle lips for setting in a controlled manner a thickness profile of a conveyable melt. A plurality of adjusting elements, in particular a plurality of adjusting pins, which are coupled to a respective thermoelement, is arranged at the first nozzle lip, wherein the thermoelements are controllable by the regulation in such a way that the slot adjustment can be realized by the action of a mechanical force from the respective adjusting element on the first nozzle lip as a result of an expansion or contraction of the thermoelements. At least one clamping blade is respectively arranged in a right-hand and left-hand edge region of the nozzle assembly, wherein the width of the nozzle discharge slot can be variably set. The method comprises the following steps, which are carried out automatically for adjusting the width of the nozzle discharge slot and for clamping the adjusting elements: 115-. (canceled)16. A method for automatically regulating the size of a nozzle discharge slot of a nozzle assembly , wherein the nozzle assembly comprises a first and a second nozzle lip and a nozzle discharge slot arranged between the nozzle lips for setting in a controlled manner a thickness profile of a conveyable melt , wherein a plurality of adjusting elements is arranged at the first nozzle lip , which are coupled to a respective thermoelement , wherein the thermoelements are controllable by the regulation in such a way that the slot adjustment can be realized by the action of a mechanical force from the respective adjusting element on the first nozzle lip as a result of an expansion or contraction of the thermoelements , wherein at least one clamping blade is respectively arranged in a right-hand and left-hand edge region of the nozzle assembly , ...

Apparatus And Method For Providing Marks On Extruded Films

The invention relates to an apparatus ( 10 ) for providing marks on extruded films ( 7 ), in particular on stretched films, which are exiting an extrusion lip ( 3 ) of a film extruder ( 1 ) and a respective method. The apparatus ( 10 ) comprises at least one nozzle means ( 13 ) for directing a gas stream, preferably an air stream to a surface of the film ( 7 ) exiting the extrusion lip ( 3 ) of the film extruder ( 1 ), wherein the nozzle means ( 13 ) are configured and arranged in such a manner that the gas stream locally causes a cooling of the extruded film ( 7 ) to create a local mark.

Conicity correction for rubber component extrusion

A method for correcting the conicity of a tread strip is described. The method includes the steps of extruding a tread profile having a right hand side, a left hand side and a chimney; measuring the thickness of the tread profile at the right hand side and the left hand side; calculating the mass of the tread on the left hand side and the right hand side; and adjusting the location of the chimney incrementally towards the side which is least in mass.

Three-dimensional printing with multi-material support

Three-dimensional printer fabrication is improved by receiving a digital model of an object specifying two or more different build materials, prioritizing the different build materials with a ranking, identifying exclusive locations where a surface layer of the object has one of the build materials, generating an external structure for the object according to one or more design rules, matching a first build material of the external structure to a second build material of the object at each of the exclusive locations, the matching based on at least one shared property of the materials, generating tool instructions for fabricating the object and the external structure, the tool instructions including one or more selections between the first build material and the second build material based upon the ranking and the matching, and controlling the three-dimensional printer according to the tool instructions to fabricate the object and the external structure.

Method for Automatically Regulating the Size of a Slot of a Nozzle Assembly and Control and/or Regulation System

The invention relates to a method for automatically regulating the size of a nozzle discharge slot of a nozzle assembly, wherein the nozzle assembly comprises a first and a second nozzle lip and a nozzle discharge slot arranged between the nozzle lips for setting in a controlled manner a thickness profile of a conveyable melt. A plurality of adjusting elements, in particular a plurality of adjusting pins, coupled to a respective thermoelement, is arranged on the first nozzle lip, the thermoelements being controllable by the regulation in such a way that the slot can be adjusted by the action of a mechanical force from the respective adjusting element on the first nozzle lip, as a result of the expansion or contraction of the thermoelements. At an initial operation of the nozzle assembly for conveying the melt, the adjusting elements for subsequent regulation of the slot size are set uniquely free from play as the initial setting. The invention further relates to a control and/or regulation system. 112-. (canceled)13. A method for automatically regulating the size of a nozzle discharge slot of a nozzle assembly , wherein the nozzle assembly comprises a first and a second nozzle lip and a nozzle discharge slot arranged between the nozzle lips for setting in a controlled manner a thickness profile of a conveyable melt , wherein a plurality of adjusting elements is arranged at the first nozzle lip , which are coupled to a respective thermoelement , wherein the thermoelements are controllable by the regulation in such a way that the slot adjustment can be realized by the action of a mechanical force from the respective adjusting element on the first nozzle lip as a result of an expansion or contraction of the thermoelements ,whereinat an initial operation of the nozzle assembly for conveying the melt, the adjusting elements for subsequent regulation of the slot size are set uniquely free from play as the initial setting.14. The method according to claim 13 ,whereina ...

EXTRUSION DIE WITH IMPROVED EXIT GAP CONTROL

An extrusion die including a die body having a movable die lip, is provided with improved automated control of the exit orifice through which a flowable polymer is extruded. The automated control is provided by lip adjustment assemblies each of which includes a thermally responsive translator and each of which is in engagement with the movable die lip. Beneficially, the lip adjustment assemblies are also in engagement with a support structure located to reduce the effect of flow pressure-induced deflection. Improved automated control of the movable lip and the exit orifice gap provides a web having a prescribed thickness profile without manual intervention being required. 1. An extrusion die providing improved control of the exit orifice gap ,said extrusion die comprising a die body and a plurality of thermally responsive translators, wherein said extrusion die further comprises a flow channel having a main flow direction and comprising an upstream flow channel portion in communication with a transverse-flow providing manifold and with a downstream flow channel portion comprising an exit orifice,wherein said die body comprises a movable lip, and wherein said plurality of thermally responsive translators are linearly movable, and wherein said thermally responsive translators are disposed in a spaced away relationship from said die body for reducing thermal cross-talk of said thermally responsive translators with said die body, andwherein a plurality of automated lip adjustment means comprising said thermally responsive translators are disposed between said movable lip and a support structure, wherein said support structure is secured to, or is unitary with, said die body at a location upstream of the backline of said transverse flow-providing manifold.2. The extrusion die of claim 1 , wherein a face of said support structure is in engagement with an abutment of said die body at said location.3. The extrusion die of claim 1 , wherein said location is upstream of a ...

MULTI-NOZZLE EXTRUDER FOR USE IN THREE-DIMENSIONAL OBJECT PRINTERS

A controller operates a first actuator to produce relative movement between a multi-nozzle extrusion printhead and a support member along a predetermined path for one layer of a three-dimensional printed object. The multi-nozzle extrusion printhead includes a housing with a chamber, a valve assembly having a plurality of passageways, and a planar member having a plurality of nozzles. The passageways of the valve assembly and the nozzles of the planar member are connected to one another in a one-to-one correspondence and valve members of the valve assembly are operated to open and close melted extruded material flow to the nozzles selectively and independently. 1. A three-dimensional (3D) object printer comprising:a support member; a housing in which a chamber is configured for storage of melted extrusion material and a plurality of passageways, each passageway is fluidically connected at a first end to the chamber so melted extrusion material flows from the chamber in the housing into the passageways and out of the housing at a second end;', 'a valve assembly having a plurality of passageways, each passageway in the valve assembly is fluidically connected at a first end to the second end of a passageway in the plurality of passageways in the housing in a one-to-one correspondence so the melted extrusion material flowing out of the second ends of the passageways in the housing flows into the first end of a corresponding passageway in the valve assembly, each passageway in the valve assembly includes a valve member configured to move bidirectionally in the passageway to open and close the passageway in which the valve member is located selectively and independently of the other passageways in the valve assembly;', 'a planar member having a plurality of nozzles, each nozzle having a passageway that extends from one planar surface of the planar member abutting the valve assembly to an end that is flush with an opposite planar surface of the planar member, the plurality ...

Process for production of embossed films based on plasticized polyvinyl acetal

Polyvinyl acetal films with less blocking tendency and which allow for escape of gas during laminating to form laminated composities are prepared by a process for embossing a film comprising plasticized polyvinyl acetal with a roughness Rz on at least one surfaces of 20 to 100 μm by the steps of a. extruding of plasticised polyvinyl acetal to a film with a stochastic roughness of the surfaces of Rz=1 to 70 μm, b. embossing at least one surface of the film obtained in step a) with channels having a depth of 5-50 μm, a width of 10-200 μm and a pitch of 50-2500 μm, wherein c. the surface roughness of the elevations between the channels is at most 20% lower as obtained in step a).

SYSTEM AND METHOD FOR 3D PRINTING WITH METAL FILAMENT MATERIALS

An additive manufacturing system configured to a 3D print using a metal wire material includes a drive mechanism configured to feed the metal feedstock into an inlet tube and a liquefier. The liquefier has a chamber configured to accept the metal feedstock from the inlet tube. The metal feed stock is heated in the chamber such that a melt pool is formed in the chamber. The liquefier has an extrusion tube in fluid communication with the chamber, the extrusion tube having a length (L) and a diameter (D) wherein the ratio of length to diameter (L/D) ranges from about 4:1 to about 20:1. The system has a platen with a surface configured to accept melted material from the liquefier, wherein the platen and the liquefier move in at least three dimensions relative to each other. The system includes a regulated source of pressurized inert gas flowably coupled to the liquefier and configured to place a controlled positive pressure onto the melt pool sufficient to overcome the resistance of the extrusion tube such that a part may be formed by the extrusion of the liquidus metal along toolpaths defined by the relative motion of the liquefier and the platen. 120-. (canceled)21. An additive manufacturing system configured to 3D print a part from a metal material , the system comprising:an inlet tube for conveying a metal feedstock in wire form; a chamber configured to accept the metal feedstock from the inlet tube at an upstream end thereof and to accumulate melted metal feedstock as a melt pool in a downstream end thereof;', 'an extrusion tube in fluid communication with the chamber, the extrusion tube having a length (L) and a diameter (D) and terminating in an extrusion tip, wherein the ratio of length to diameter (L/D) ranges from about 4:1 to about 20:1, and wherein the L/D ratio is selected to resist a flow of liquidus metal from the melt pool through the extrusion tube at atmospheric pressure; and', 'a heater configured to impart heat into the chamber and the extrusion tube ...

Nozzle for extruding a preform tube

An extrusion nozzle for making tubular preforms has a mandrel extending along a vertical axis, an annular and stationary nozzle body spacedly radially surrounding the mandrel, and a holding ring having an upper end axially slidable in the nozzle body, braced axially downwardly against the nozzle body, and having a lower end spaced radially inward from shiftable limitedly radially relative to the nozzle body. A nozzle ring has an upper end axially slidable in the holding ring, is braced axially downwardly against the nozzle body, and has a radially deflectable lower end forming an annular extrusion gap with the mandrel. A first positioner engages the lower end of nozzle ring and is operable to radially deflect this lower end. A second positioner engages radially with the lower end of the holding ring or with the nozzle ring for radially deflecting same.

Annular die and method for extrusion

The invention relates to an annular die on an extrusion head for producing tubular or sheet-like preforms with an arcuate die gap and with a melt channel delimited by a mandrel and a die body, the cross-sectional profile of the melt channel being variable by way of adjusting elements, the annular die according to the invention being distinguished by the fact that the outer circumference of the melt channel is at least partially delimited directly by at least one radially adjustable slide, that the slide is formed by a number of segments that can be adjusted together from at least one first position into at least one second position, and that the segments in each position form a respectively closed arc portion of the delimitation of the melt channel, the radius of the arc portion being different according to the position of the segments.

Extruder and die for the same

An extruder which can be applied to various types of resin and elastomer without having to replace a die is provided. An extruder of the present inventions has: a barrel to which raw material, that is raw elastomer or raw material resin, is supplied; a screw that is driven to rotate in the barrel in order to process the raw material together with the barrel; and die 5 that is provided at a discharge point of the barrel and that discharges the raw material that has been processed. Die 5 includes first flat plate 11 having at least one first hole 13 and second flat plate 12 having at least one second hole 14, wherein first flat plate 11 and second flat plate 12 are arranged adjacent to each other along longitudinal axis X1 of the barrel, and at least either first flat plate 11 or second flat plate 12 is movable relative to the other flat plate such that an overlapping part of first hole 13 and second hole 14 can be varied.

METHOD AND SYSTEM FOR REGULATING AN EXTRUSION PROCESS

There is described a method and system for regulating an extrusion process by obtaining a first thickness at a first position along an extrudate as material is extruded through a die gap of a die; comparing the first thickness with an expected thickness of the extrudate at the first position to obtain a value for an error, the expected thickness modeled in real-time using a size of the die gap as input; and varying the size of the die gap when the error exceeds a threshold to compensate for the error. There is also described a method and system for determining an expected thickness of a material during an extrusion process. 1. A method for regulating an extrusion process , the method comprising:obtaining a first thickness at a first position along an extrudate as material is extruded through a die gap of a die;comparing the first thickness with an expected thickness of the extrudate at the first position to obtain a value for an error, the expected thickness modeled in real-time using a size of the die gap as input; andvarying the size of the die gap when the error exceeds a threshold to compensate for the error.2. The method of claim 1 , wherein the extrusion process is virtual.3. The method of claim 1 , wherein the expected thickness is modeled using an input-dependent time-varying delay model.4. The method of claim 1 , wherein the expected thickness is modeled with a computer model comprising a first component that models a material transport delay from the die gap to the first position claim 1 , a second component that determines a steady state thickness of the extrudate at the first position taking into account the material transport delay claim 1 , and a third component that replicates a change of the steady state thickness with respect to time to output the expected thickness at the first position.5. The method of claim 4 , wherein the second component comprises a linear system with non-minimum phase dynamics and a unity DC gain.6. The method of claim 1 , ...

Apparatus And Method For Automatically Analyzing Extruded Films

The invention relates to an apparatus for automatically analyzing extruded films, in particular stretched films, wherein a neck-in portion is formed at each of both edges of the film at a specific distance from an extrusion lip of a film extruder along the longitudinal transport direction of the film, and a respective method. The apparatus comprises two edge detectors being arranged along a first line substantially transversal to the longitudinal direction and being spaced from each other by a specific distance, wherein each one edge detector is configured to detect, preferably to continuously detect the lateral position of one respective edge of the neck-in portion of the film, a calculation means for determining the spatial relation between at least one lateral position at the extrusion lip and a respective lateral position at the neck-in portion on the basis of the two lateral positions of the edges of the neck-in portion of the film. 117-. (canceled)18. Method for automatically analyzing extruded films , in particular stretched films , wherein a neck-in portion is formed at each of both edges of the film at a specific distance from an extrusion lip of a film extruder along the longitudinal transport direction of the film , comprising the following steps:detecting, preferably continuously detecting the lateral position of one respective edge of the neck-in portion of the film, using two edge detectors being arranged along a first line substantially transversal to the longitudinal direction and being spaced from each other by a specific distance,characterized bydetermining the spatial relation between at least one lateral position at the extrusion lip and a respective lateral position at the neck-in portion on the basis of the two lateral positions of the edges of the neck-in portion of the film using a calculation means,creating at least one mark on the extruded film at at least one lateral position at the extrusion lip in the border region of the first and/or ...

Methods for manufacturing metal-resin composite pipe that can be easily wound into ring shape

The present invention may manufacture a composite pipe by forming an adhesive layer and a resin layer on an outer surface of a metal pipe, and although the composite pipe is wound in a ring shape after the composite pipe is manufactured, a circular cross sectional shape may be maintained without deformation, and after the composite pipe is straightened for the purpose of construction, separation or buckling may be prevented, resulting in excellent transportability and constructability of a product.

Rubber Extrusion Device and Method for Manufacturing Rubber Extrudate

A die attached to a head of a rubber extrusion device is disposed at a leading end position of an extrusion flow path. The die is moved at least in a uniaxial direction relative to the head along a leading end surface of the head to place the die and the head in a desired relative position. A rubber material is extruded forward using a screw installed inside a cylinder, while being mixed and kneaded. Resultant unvulcanized rubber is fed into an extrusion flow path and extruded from an extrusion port formed in the die. 1. A rubber extrusion device comprising a cylindrical cylinder , a screw disposed in an internal space of the cylinder , a head installed at a leading end of the cylinder and including an extrusion flow path communicating with the internal space , and a die attached to the head at a leading end position of the extrusion flow path , the die including an extrusion port ,the rubber extrusion device comprising a moving unit moving the die at least in a uniaxial direction relative to the head along a leading end surface of the head, and being capable of fixing the die and the head in a desired relative position.2. The rubber extrusion device according to claim 1 , wherein the uniaxial direction is set in an extension direction of the extrusion port.3. The rubber extrusion device according to claim 1 , wherein the moving unit is capable of moving the die in a discretionary direction relative to the head along a leading end surface of the head.4. The rubber extrusion device according to claim 1 , further comprising a control unit moving the die and the head to a desired relative position by controlling operation of the moving unit.5. The rubber extrusion device according to claim 1 , further comprising a sensor detecting an amount of curving claim 1 , with respect to an extrusion direction claim 1 , of a rubber extrudate extruded from the extrusion port claim 1 , and based on the detection data from the sensor claim 1 , the control unit moves the die and the ...

Rubber Extrusion Device and Method for Manufacturing Rubber Extrudate

A rubber extrusion device includes a head mounted with a die having: an extrusion port variable member disposed at a front end position of an extrusion flow path to move in a direction allowing an area of an extrusion port to change; and a rectifying body that enters and exits the extrusion flow path from a front end side of the extrusion flow path. A rubber extrudate is manufactured by: positioning the extrusion port variable member at a desired position in its movement direction; positioning the rectifying body at a desired position by moving the rectifying body in an extension direction of the extrusion flow path while being in contact with an inner wall of the extrusion flow path; and extruding unvulcanized rubber from the extrusion port by feeding the unvulcanized rubber into the extrusion flow path.

Rubber Extrusion Device and Method For Manufacturing Rubber Extrudate

A rubber extrusion device includes a sensor which detects a deviation from a preset reference position of a rubber extrudate extruded from an extrusion port. Based on this detection data, a control unit provides control for correction of the deviation by adjusting a position of a die relative to a head along a leading end surface of the head or a rotational speed of a screw. A rubber material is mixed and kneaded while being extruded forward by a screw installed inside a cylinder. Resultant unvulcanized rubber is fed into an extrusion flow path and extruded from the extrusion port formed in the die. 1. A rubber extrusion device comprising a cylindrical cylinder , a screw disposed in an internal space of the cylinder , a head disposed at a leading end of the cylinder and including an extrusion flow path communicating with the internal space , and a die attached to the head at a leading end position of the extrusion flow path and including an extrusion port , whereinthe rubber extrusion device comprises a sensor detecting a deviation from a preset reference position of a rubber extrudate extruded from the extrusion port, and a control unit providing control for correction of the deviation based on detection data from the sensor to suppress a curvature of the rubber extrudate.2. The rubber extrusion device according to claim 1 , further comprising a moving unit moving the die relative to the head at least in a uniaxial direction along a leading end surface of the head claim 1 , and the moving unit is controlled by the control unit to correct the deviation.3. The rubber extrusion device according to claim 1 , wherein a rotational speed of the screw is controlled by the control unit to correct the deviation.4. The rubber extrusion device according to claim 1 , wherein the deviation is an amount of shift in a direction orthogonal to an extrusion direction of the rubber extrudate.5. The rubber extrusion device according to claim 1 , wherein the rubber extrudate is placed ...

Extrusion Die and Extrusion Method of Sheet Using the Same

The present invention relates to an extrusion die and a method for extruding a sheet using the same, and according to one aspect of the present invention, there is provided an extrusion die comprising a storage part configured to hold a raw material, the storage part defining a first width, a pressure part configured to move the raw material through the storage part, a first die defining a second width less than the first width, such that a flow width of the raw material becomes narrower, a second die in fluid communication with the first die, the second die defining a width that increases from the second width to a third width, such that the flow width of the raw material passing through the first die becomes wider and a flow thickness becomes smaller, and a heating part configured to heat the raw material passing through the second die.

Split extrusion die assembly for thermoplastic materials and methods of using the same

A die spool for the extrusion of thermoplastic materials includes an axially split elongate spool body so as to be separable into first and second spool segments. The spool segments collectively establish the spool body and also define an axially oriented extrusion cavity through which thermoplastic material is conveyed. An alignment system ensures that only a single orientation of the extrusion axis is possible when the die spool is coupled to another similar die spool (or to an extrusion die associated with an extruder). A die spool assembly may therefore be provided which is comprised of a number of individual die spools. Preferably, a decreasing temperature gradient is established within the extrusion cavity of the die spool assembly (as may be accomplished by controllably operating electrical resistive heater elements) so as to at least partially solidify the thermoplastic extrudate therewithin. During extrusion start-up, a lower die spool segment is employed to support an initial length of thermoplastic extrudate, with the upper die spool segment being mated therewith (thereby collectively defining the extrusion cavity) once the extrudate extends beyond the downstream end of the lower segment. In such a manner, manual conveyance assistance along the extrusion axis may be imparted to the extrudate during start-up.

High tear films from hafnocene catalyzed polyethylenes

A polyethylene film having a balance of improved physical and mechanical properties and a method for making the same are provided. In one aspect, the film includes a 1% secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil. In one aspect, the method comprises reacting ethylene derived units and a comonomer in the presence of a hafnium-based metallocene at a temperature of from 70° C. and 90° C., an ethylene partial pressure of from 120 psia and 260 psia, and a comonomer to ethylene ratio of from 0.01 to 0.02 to produce an ethylene based polymer. The method further comprises extruding the ethylene based polymer at conditions sufficient to produce a polyethylene film comprising a secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil.

High tear films from hafnocene catalyzed polyethylenes

A polyethylene film having a balance of improved physical and mechanical properties and a method for making the same are provided. In one aspect, the film includes a 1% secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil. In one aspect, the method comprises reacting ethylene derived units and a comonomer in the presence of a hafnium-based metallocene at a temperature of from 70° C. and 90° C., an ethylene partial pressure of from 120 psia and 260 psia, and a comonomer to ethylene ratio of from 0.01 to 0.02 to produce an ethylene based polymer. The method further comprises extruding the ethylene based polymer at conditions sufficient to produce a polyethylene film comprising a secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil.

Polyethylene shrink films and processes for making the same

Shrink films made from metallocene-catalyzed polyethylene polymers and processes for making the same are disclosed.

Process for producing films, especially those based on polyvinyl butyral with a slight surface tackiness

Method and apparatus for solid prototyping

An improved extrusion-based manufacturing system includes one or more extruders, with each extruder containing at least two stages of increasing pressurization. In a preferred embodiment, a first stage of pressurization is created by the motion of a solid wafer of thermoplastic through an orifice into a heater chamber. In another preferred embodiment, the wafers are stored in removable, electronically tagged, cassettes and are removed therefrom by a stapler mechanism which feeds the wafers from the cassette to a tractor feed mechanism on demand. In each embodiment, a second stage of pressurization is provided by a pump, with the first stage pressurization maintaining a flow of thermoplastic to the pump under all expected pump rates.

High tear films from hafnocene catalyzed polyethylenes

A polyethylene film having a balance of improved physical and mechanical properties and a method for making the same are provided. In one aspect, the film includes a 1% secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil. In one aspect, the method comprises reacting ethylene derived units and a comonomer in the presence of a hafnium-based metallocene at a temperature of from 70° C. and 90° C., an ethylene partial pressure of from 120 psia and 260 psia, and a comonomer to ethylene ratio of from 0.01 to 0.02 to produce an ethylene based polymer. The method further comprises extruding the ethylene based polymer at conditions sufficient to produce a polyethylene film comprising a secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil.

High tear films from hafnocene catalyzed polyethylenes

A polyethylene film having a balance of improved physical and mechanical properties and a method for making the same are provided. In one aspect, the film includes a 1% secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil. In one aspect, the method comprises reacting ethylene derived units and a comonomer in the presence of a hafnium-based metallocene at a temperature of from 70° C. and 90° C., an ethylene partial pressure of from 120 psia and 260 psia, and a comonomer to ethylene ratio of from 0.01 to 0.02 to produce an ethylene based polymer. The method further comprises extruding the ethylene based polymer at conditions sufficient to produce a polyethylene film comprising a secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil.

High tear films from hafnocene catalyzed polyethylenes

A polyethylene film having a balance of improved physical and mechanical properties and a method for making the same are provided. In one aspect, the film includes a 1% secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil. In one aspect, the method comprises reacting ethylene derived units and a comonomer in the presence of a hafnium-based metallocene at a temperature of from 70° C. and 90° C., an ethylene partial pressure of from 120 psia and 260 psia, and a comonomer to ethylene ratio of from 0.01 to 0.02 to produce an ethylene based polymer. The method further comprises extruding the ethylene based polymer at conditions sufficient to produce a polyethylene film comprising a secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil.

High tear films from hafnocene catalyzed polyethylenes

A polyethylene film having a balance of improved physical and mechanical properties and a method for making the same are provided. In one aspect, the film includes a 1% secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil. In one aspect, the method comprises reacting ethylene derived units and a comonomer in the presence of a hafnium-based metallocene at a temperature of from 70° C. and 90° C., an ethylene partial pressure of from 120 psia and 260 psia, and a comonomer to ethylene ratio of from 0.01 to 0.02 to produce an ethylene based polymer. The method further comprises extruding the ethylene based polymer at conditions sufficient to produce a polyethylene film comprising a secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil.

由二茂铪催化的聚乙烯获得的高撕裂性薄膜

提供了具有改进的物理和机械性能的平衡的聚乙烯薄膜和制备该薄膜的方法。在一个方面，该薄膜具有高于25,000psi的1％正割模量，高于500g/mil的抗落镖冲击性，和高于500g/mil的MD撕裂强度。该方法包括让乙烯衍生的单元和共聚单体在铪基金属茂的存在下在70－90℃的温度，120－260psia的乙烯分压和0.01－0.02的共聚单体与乙烯比率下起反应，以形成乙烯型聚合物。该方法进一步包括在足以形成具有高于25,000psi的1％正割模量，高于500g/mil的抗落镖冲击性，和高于500g/mil的MD撕裂强度的聚乙烯薄膜的条件下挤出乙烯型聚合物。

聚乙烯收缩膜及其制备方法

公开了由金属茂催化的聚乙烯聚合物制得的收缩膜及所述收缩膜的制备方法。

Screw machine with start valve and throttle

Split extrusion die assembly for thermoplastic materials and methods of using the same

ABSTRACT A die spool for the extrusion of thermoplastic materials includes an axially split elongate spool body so as to be separable into first and second spool segments. The spool segments collectively establish the spool body and also define an axially oriented extrusion cavity through which thermoplastic material is conveyed. An alignment system ensures that only a single orientation of the extrusion axis is possible when the die spool is coupled to another similar die spool (or to an extrusion die associated with an extruder). A die spool assembly may therefore be provided which is comprised of a number of individual die spools. Preferably, a decreasing temperature gradient is established within the extrusion cavity of the die spool assembly (as may be accomplished by controllably operating electrical resistive heater elements) so as to at least partially solidify the thermoplastic extrudate therewithin. During extrusion start-up, a lower die spool segment is employed to support an initial length of thermoplastic extrudate, with the upper die pool segment being mated therewith (thereby collectively defining the extrusion cavity) once the extrudate extends beyond the downstream end of the lower segment. In such a manner, manual conveyance assistance along the extrusion axis may be imparted to the extrudate during start-up.

Carretel de matriz para extrusao de materiais temoplasticos,conjunto de carretel de matriz aparelho de extrusao de termoplasticos e processo de formacao de produtos de termoplastico extrusado

用于热塑材料的对开挤出模组件及其使用方法

一种用于热塑材料挤出的模筒，它包括一个可沿纵向平面对分成上、下模筒件的筒体。模筒组件由若干个相似模筒组成，在该组件的挤出空腔内部可以建立起沿轴向递减的温度梯度，因而挤出物在离开该空腔时，至少已被部分固化。在挤出机起动期间，下模筒件用来支承挤出物的初始长度，一旦挤出物的长度超出该下模筒件的下游端，该上模筒件就与下模筒件共同配合组成挤出空腔。这样，在起动期间，就可以用人力来帮助输送该挤出物。

Split extrusion die assembly for thermoplastic materials and methods of using the same

A die spool (10) for the extrusion of thermoplastic materials includes an axially split elongate spool body so as to be separable into first and second spool segments. The spool segments collectively establish the spool body and also define an axially oriented extrusion cavity through which thermoplastic material is conveyed. An alignment system ensures that only a single orientation of the extrusion axis is possible when the die spool is coupled to another similar die spool (or to an extrusion die associated with an extruder). A die spool assembly (10) may therefore be provided which is comprised of a number of individual die spools (10a,10b,10c). Preferably, a decreasing temperature gradient is established within the extrusion cavity of the die spool assembly (10) (as may be accomplished by controllably operating electrical resistive heater elements) so as to at least partially solidify the thermoplastic extrudate therewithin. During extrusion start-up, a lower die spool segment (36a,36b,36c) is employed to support an initial length of thermoplastic extrudate, with the upper die spool segment (34a,34b,34c) being mated therewith (thereby collectively defining the extrusion cavity) once the extrudate extends beyond the downstream end of the lower segment. In such a manner, manual conveyance assistance along the extrusion axis may be imparted to the extrudate during start-up.

Extrusion device for the processing of plastics, which can be coupled to systems for supplying thermosetting and thermoplastic polymers

A group of hollow modules through which the material to be extruded flows, is provided that includes at least: a rectangular heating-shaping module, in which the material undergoes a temperature increase and takes on the desired shape; and a tubular cooling-solidification module, in which the material changes from liquid to solid. A heating-reaction module is provided upstream of the heating-shaping module. The heating-reaction module includes an interchangeable hollow tube with an external heating system. The heating-shaping module includes detachable parts and includes another external heating system based on the auto-acceleration of the curing reaction and of the heat supply from said external heating system. The tubular portion between the heating-reaction module and the heating-shaping module includes a shaping coupling equipped with a through-hole. The extrusion module includes a circuit through which the polymer flows into at least two push compartments.

Apparatus for extruding foamed thermoplastic material

An apparatus for continuously forming a foamed thermoplastic profile including an extruder having a die attached to the outlet end thereof. A rotatable screw is disposed within the extruder and a mandrel is secured to the downstream end of the screw. The screw extends towards the outlet of the die. The mandrel and die cooperatively define an annular outlet orifice to produce a tubular shaped parison. Adjacent to the annular outlet is a sizing apparatus to properly size and shape the tubular parison.

Extrusion die with melt flow control

An extrusion die block providing a useful means of obtaining a polymer sheet with a highly efficient degree of gauge control comprises an extrusion passage defined by opposed surfaces and terminating in an extrusion orifice, at least one of said surfaces being provided with heating means comprising a plurality of elongated heater elements located within the die block at a distance of not more than 10 mm from the surface to be heated thereby, said elements being oriented in parallel with the major axis of each in the direction of extrusion.

Adjustable die mechanism

An adjustable die mechanism (10) for extruding a profiled strip of plastic or elastomeric material wherein a plurality of adjacent segments (44) is located upstream and in spaced relation from a final extrusion die assembly (32), having a predetermined profiled opening (38), with this plurality of segments (44) being mounted for individual and independent adjustment thereof, each segment having one end (46) capable of extending into the extrudate flow channel (26). Means for actuating (64) move the segments (44) relative to the profiled opening (38) in a predetermined manner such that moving the segments (44) into the profiled opening (38) modifies the flow of the extrudate material downstream of the segments (44) as the profiled strip emerges from the die assembly (32). The die mechanism includes control means (82) for selectively operating the means for moving the segments so as to produce a strip of material having the desired characteristics.

Multi-layer extrusion die

A multi-layer extrusion die wherein a temperature control mechanism for heating or cooling an inner layer resin is provided inside an inner layer resin flow path, and resins flowing through respective resin flow paths are each heated to a suitable temperature so as to eliminate possibilities of occurrence of burning of the resin and the like.

Split extrusion die assembly for thermoplastic materials and methods of using the same

A die spool (10) for the extrusion of thermoplastic materials includes an axially split elongate spool body so as to be separable into first and second spool segments. The spool segments collectively establish the spool body and also define an axially oriented extrusion cavity through which thermoplastic material is conveyed. An alignment system ensures that only a single orientation of the extrusion axis is possible when the die spool is coupled to another similar die spool (or to an extrusion die associated with an extruder). A die spool assembly (10) may therefore be provided which is comprised of a number of individual die spools (10a,10b,10c). Preferably, a decreasing temperature gradient is established within the extrusion cavity of the die spool assembly (10) (as may be accomplished by controllably operating electrical resistive heater elements) so as to at least partially solidify the thermoplastic extrudate therewithin. During extrusion start-up, a lower die spool segment (36a,36b,36c) is employed to support an initial length of thermoplastic extrudate, with the upper die spool segment (34a,34b,34c) being mated therewith (thereby collectively defining the extrusion cavity) once the extrudate extends beyond the downstream end of the lower segment. In such a manner, manual conveyance assistance along the extrusion axis may be imparted to the extrudate during start-up.

Rubber Extrusion Molding Machine for Thermocrosslinkable Resin

내용 없음. No content.

熱可塑性樹脂の押出成形法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

An apparatus and a method for producing a multi-layer extrudate

An apparatus is intended to produce a multi-layer extrudate comprising an intermediate material interposed between at least two layers of outer material. The apparatus comprises an arrangement of ducts which includes a first duct and a second duct through which respective lateral flows of outer material can flow. The arrangement of ducts also includes a further duct through which a central flow comprising at least the intermediate material can flow. The apparatus further comprises at least one obstructing element for interacting at least with the central flow while the central flow is advancing in an advancement direction. The at least one obstructing element is movable with a movement having a component directed transversally to the advancement direction, so as to obstruct the central flow in the advancement direction at preset intervals.

Thermoplastic molding process and apparatus

A system and method for forming an article from thermoplastic material and fiber. The method includes heating thermoplastic material to form a molten thermoplastic material for blending with the fiber. The molten thermoplastic material is blended with the fibers to form a molten composite material having a concentration of fiber by weight. The molten composite material may then be extruded through dynamic dies to deliver discrete controlled material that is gravitated onto a lower portion of a mold. The lower portion of the mold may be moved in space and time while receiving the flow of composite material to deposit a predetermined quantity of molten composite material thereon conforming to mold cavities of the lower and an upper portion of the mold. The upper portion of the mold may be pressed against the predetermined quantity of molten composite material and closing on the lower portion of the mold to form the article.

High tear films from hafnocene catalyzed polyethylenes

A polyethylene film having a balance of improved physical and mechanical properties and a method for making the same are provided. In one aspect, the film includes a 1% secant modulus of greater than 25,000 psi, a dart impact resistance'of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil. In one aspect, the method comprises reacting ethylene derived units and a comonomer in the presence of a hafnium-based metallocene at a temperature of from 70°C and 90°C, an ethylene partial pressure of from 120 psia and 260 psia, and a comonomer to ethylene ratio of from 0.01 to 0.02 to produce an ethylene based polymer. The method further comprises extruding the ethylene based polymer at conditions sufficient to produce a polyethylene film comprising a secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil.

Valve incorporating temporary phase change material

Described herein are various embodiments of a valve that may be opened and closed using a thixotropic or "stress yield" material, or other material that temporarily changes phase upon application of energy to the material. More particularly, some embodiments may include a valve that is opened and closed using a granular gel that is a temporary phase change material.

Method for producing an extruded molded article of ethylene polymer and the film

The object is to provide a method for producing a film excellent in a quality of odorless or free from deteriorating taste of food contained in a package of the extruded molded article by using an ethylene-α-olefin copolymer excellent in extrusion molding processability. This object is achieved by a method for producing an extruded molded article comprising a step of extruding a copolymer of ethylene and α-olefin of from 3 to 20 carbon atoms having an activation energy for melt flow of not less than 50 kJ/mol under one of the following conditions: (a) a temperature of melted resin at die gap of T-die is not more than 200° C., (b) a temperature of melted resin at die gap of tubular tie is not more than 170° C.

EXTRUDER CALANDER FOR PROCESSING PLASTIC BULK

Extruded thermoplastics, liquid crystalline polymers, and blends thereof having a planar morphology

The present invention relates to the extrusion of multiaxially oriented articles from blends containing thermoplastic flexible polymers and thermotropic liquid crystalline polymers. Articles having a controlled molecular orientation and a tailored coefficient of thermal expansion are also provided.

Films with high tear resistance, made of polyethylenes obtained with hafnocene catalyst

FIELD: chemistry. SUBSTANCE: invention concerns polymer film production technology, particularly polyethylene films with improved balanced physical and mechanical properties. Method of obtaining film involves obtaining ethylene-based polymer by reaction of links derived from ethylene and co-monomer in the presence of hafnium-based metallocene at 70 to 90°C, under absolute partial ethylene pressure of 120 to 260 pounds per square inch at co-monomer to ethylene ratio of 0.01 to 0.02 and obtained polymer melt extrusion under conditions sufficient for obtaining polyethylene film with 1% secant modulus over 25000 pounds per square inch, load hit resistance over 500 g/mm and longitudinal tear resistance over 500 g/mm. EFFECT: obtaining polymer films, particularly polyethylene films with improved balanced physical and mechanical properties. 7 cl, 3 tbl, 17 ex ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 2 348 659 (13) C2 (51) ÌÏÊ C08J 5/18 C08F 210/16 C08F 4/64 C08F 210/02 B29C 39/00 B29C 49/00 ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) (2006.01) (2006.01) (2006.01) (2006.01) (2006.01) (2006.01) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2006125381/04, 13.04.2004 (72) Àâòîð(û): ×ÓËÜ Äæîí Ô. (US), ÔÀÐËÅÉ Äæåéìñ ÌàêËåîä (US), ÌÀÊÊÀËËÎÓ Ëîëèí Ã. (US), ÈÌÏÅËÌÀÍ Ðàéàí Óèíñòîí (US) (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 13.04.2004 (73) Ïàòåíòîîáëàäàòåëü(è): ÞÍÈÂÅÉØÍ ÒÅÕÍÎËÎÄÆÈÇ, ËËÑ (US) (43) Äàòà ïóáëèêàöèè çà âêè: 27.01.2008 R U (30) Êîíâåíöèîííûé ïðèîðèòåò: 15.12.2003 US 10/737,654 (45) Îïóáëèêîâàíî: 10.03.2009 Áþë. ¹ 7 2 3 4 8 6 5 9 (56) Ñïèñîê äîêóìåíòîâ, öèòèðîâàííûõ â îò÷åòå î ïîèñêå: US 6242545 À, 05.06.2001. US 6340532 À, 22.01.2002. US 5639842 À, 17.06.1997. US 6255426 B1, 03.07.2001. RU 2258712 C2, 04.07.2003. RU 2192426 C2, 10.11.2002. (85) Äàòà ïåðåâîäà çà âêè PCT íà íàöèîíàëüíóþ ôàçó: 17.07.2006 2 3 4 8 6 5 9 R U (87) Ïóáëèêàöè PCT: WO 2005/061225 (07.07.2005) C 2 C 2 (86) Çà âêà PCT: US 2004/011363 (13.04.2004) Àäðåñ ...

Method of operating an apparatus for the production of biaxially stretched plastic tubes

Biaxially stretched thermoplastic tubes are made in an apparatus having a plastic extruder, the output of which is controllable on an open-circuit or closed-circuit basis and which has a too head for the extrusion of a highly viscous exiting tubing, a stretching mandrel and a speed-controllable draw-off device. In the region of the run-on part there is disposed a surrounding temperature control bath for controlling the temperature of the tube to the stretching temperature while a cooling bath is disposed in the region of the draw-off part. A Raman spectrometer operating with laser waves is disposed in the zone downstream of the cooling bath. The frequency of the laser waves is adapted to the plastic used and the energy of the laser waves is so adapted to the wall thickness of the tube produced that in addition to the radiated wave scattered or reflected by the plastics, at least one wave corresponding to a Raman spectral line is radiated from the tube. The extent of axial orientation of the plastics molecules is determined from properties of the wave scattered or reflected and/or radiated from the tube.

Process for the preparation of peroxide-crosslinked polyethylene pipes in an extrusion line

Die vorliegende Erfindung betrifft ein Verfahren Herstellung von peroxidvernetzten Polyethylenrohren in einer Extrusionslinie mit einem Extruder, einem Vernetzungsofen und einem Abzug, wobei das extrudierte Rohr einer Streckung unterzogen wird, und der Vernetzungsofen eine erste Erwärmungsstrecke von seinem Einlauf bis zu einer angetriebenen Umlenkrolle und eine zweite Erwärmungsstrecke von der Umlenkrolle bis zu seinem Auslauf aufweist, sowie eine Extrusionslinie mit einem Vernetzungsofen, der eine erste Erwärmungsstrecke von seinem Einlauf bis zu einer angetriebenen Umlenkrolle und eine zweite Erwärmungsstrecke von seiner Umlenkrolle bis zu seinem Auslauf aufweist. Aufgabe der Erfindung ist es, ein derartiges Verfahren und eine derartige Extrusionslinie zur Verfügung zu stellen, mit denen Rohre mit minimalem Schrumpf produziert werden können. Gelöst wird diese Aufgabe dadurch, dass die Streckung (S1) in der ersten Erwärmungsstrecke (A) und die Streckung (S2) in der zweiten Erwärmungsstrecke (B) überwacht und so geregelt wird, dass die erforderliche Streckung des Rohres (4) überwiegend in der ersten Erwärmungsstrecke (A) erfolgt und die Streckung (S2) des Rohres (4) in der zweiten Erwärmungsstrecke (B) gegen 0 geregelt wird. Dabei kann bzw. können die Umlenkrolle (7) des Vernetzungsofens (13) höhenverstellbar und die Erwärmungsstrecken (A, B) aus der Horizontalen winkelverstellbar sein. The present invention relates to a method for producing peroxide-crosslinked polyethylene pipes in an extrusion line with an extruder, a crosslinking oven and a take-off, the extruded pipe being subjected to stretching, and the crosslinking oven having a first heating section from its inlet to a driven deflection roller and a second heating section from the deflection roller to its outlet, and an extrusion line with a crosslinking furnace, which has a first heating section from its inlet to a driven deflection roller and a second heating section from its deflection roller to its ...

High Tear Films from Hafnocene catalyzed Polyethylenes

향상된 물리적 및 기계적 특성이 균형을 이루는 폴리에틸렌 필름 및 이의 제조 방법이 제공된다. 한 면에서, 필름은 25,000 psi 초과의 1％ 시컨트 모듈러스, 500 g/mil 초과의 다트 충격 저항성, 및 500 g/mil 초과의 MD 인열 강도를 포함한다. 한 면에서, 방법은 에틸렌 기재 중합체를 생성하기 위해 하프늄 기재 메탈로센의 존재하에, 70℃ 내지 90℃의 온도, 120 psia 내지 260 psia의 에틸렌 분압, 및 0.01 내지 0.02의 에틸렌에 대한 공단량체의 비율에서 에틸렌 유도 단위 및 공단량체를 반응시키는 것을 포함한다. 방법은 25,000 psi 초과의 시컨트 모듈러스, 500 g/mil 초과의 다트 충격 저항성, 및 500 g/mil 초과의 MD 인열 강도를 포함하는 폴리에틸렌 필름을 생성하기 충분한 조건에서 에틸렌 기재 중합체를 압출하는 것을 추가로 포함한다. Provided are polyethylene films and methods of making them that balance improved physical and mechanical properties. In one aspect, the film includes 1% secant modulus greater than 25,000 psi, dart impact resistance greater than 500 g / mil, and MD tear strength greater than 500 g / mil. In one aspect, the process comprises the use of a comonomer for a temperature of 70 ° C. to 90 ° C., an ethylene partial pressure of 120 psia to 260 psia, and ethylene of 0.01 to 0.02 in the presence of a hafnium based metallocene to produce an ethylene based polymer. Reacting the ethylene derived units and comonomers in proportions. The method further comprises extruding the ethylene based polymer under conditions sufficient to produce a polyethylene film comprising secant modulus greater than 25,000 psi, dart impact resistance greater than 500 g / mil, and MD tear strength greater than 500 g / mil. do. 폴리에틸렌 필름, 하프노센 촉매, 엘멘도르프 인열 강도, 다트 충격 저항성 Polyethylene film, hafnocene catalyst, Elmendorf tear strength, dart impact resistance

High tear films from hafnocene catalyzed polyethylenes

High tear films from hafnocene catalyzed polyethylenes

A polyethylene film having a balance of improved physical and mechanical properties and a method for making the same are provided. In one aspect, the film includes a 1% secant modulus of greater than 25,000 psi, a dart impact resistance'of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil. In one aspect, the method comprises reacting ethylene derived units and a comonomer in the presence of a hafnium-based metallocene at a temperature of from 70°C and 90°C, an ethylene partial pressure of from 120 psia and 260 psia, and a comonomer to ethylene ratio of from 0.01 to 0.02 to produce an ethylene based polymer. The method further comprises extruding the ethylene based polymer at conditions sufficient to produce a polyethylene film comprising a secant modulus of greater than 25,000 psi, a dart impact resistance of greater than 500 g/mil, and a MD tear strength of greater than 500 g/mil.

Polyethylene shrink films and processes for making the same

Shrink films made from metallocene-catalyzed polyethylene polymers and processes for making the same are disclosed.

耐热聚乙烯管的生产方法

本发明涉及一种耐热聚乙烯管的生产方法，是通过以下步骤实现的：准备原料；用吸料系统把管材专用料吸入真空料筒，开启料筒温度调节仪，把料筒内物料的温度控制在100±5℃，然后将烘干后的物料送入聚烯烃挤出机的螺杆机筒；调整挤出机机筒各加热区的温度；调整挤出机模头各加热区的温度；调整挤出机机头压力；把机筒内已加热的物料熔融以规定的压力从模头口模和芯棒中挤出管坯；模头口模和芯棒采用短体结构；挤出管坯的定径冷却；既能在现有一般的聚烯烃挤出机上生产耐热聚乙烯(PE-RT)管，又能解决因耐热聚乙烯(PE-RT)管材专用料的粘性强、流动性差而导致的在挤出过程中管材发黄、壁厚不均匀、内外表面不光滑等现象。

熱可塑性樹脂フイルム類の製造方法

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

High speed extrusion coating with ethylene copolymers

Extrusion coating with high line speeds of up to 600 mpm may be achieved without sacrificing the adhesion of the coating to the substrate by using an ethylene copolymer with up to 3% by weight copolymer, preferably 0.5 to 2.5% by weight VA, as the coating polymer. The extrusion temperature is in the region of incipient degradation, but maintained below the level which gives undesired degradation leading to odor or discoloration.

一种高阻隔小中空吹塑用改性高密度聚乙烯树脂及其制备方法

本发明涉及一种高阻隔小中空吹塑用改性高密度聚乙烯树脂及其制备方法。组分和质量份数比为乙烯己烯共聚高密度聚乙烯基础树脂：100份；主抗氧剂：0.08～0.12份；辅助抗氧剂：0.08～0.24份；光稳定剂：0.03‑0.1份；成核剂：0.03～0.2份。将20份乙烯己烯共聚高密度聚乙烯基础树脂与相应配比的助剂在高速混合机中混合，再经单螺杆挤出机造粒制备母粒，然后将剩余80份乙烯己烯共聚高密度聚乙烯基础树脂与上述母粒在高速混合机中重新混合，然后经双螺杆挤出机造粒，制备出高阻隔小中空吹塑用高密度聚乙烯树脂。

Apparatus for controlling polymeric material extrusion process