Walze für eine Papier- oder Kartonmaschine und Verfahren zur Herstellung der Walze

ROLL FOR A PAPER OR BOARD MACHINE, METHOD FOR MANUFACTURING THE SAME AND COATING COMPOSITION THEREFOR

A roll for use in the manufacture of paper and board has a ceramic layer having a thickness of from about 100 .mu.m to about 2000 .mu.m and including from about 50% to about 95% by weight of Cr2O3 and from about 3% to about 50% by weight of TiO 2. The outer face of the ceramic layer is finished until the roughness Ra is fr om about 0.2 .mu.m to about 2.0 .mu.m.

RAKELVORRICHTUNG IN EINER PAPIERMASCHINE

Verfahren und Vorrichtung zum Verändern der Eigenfrequenz eines Spaltwalzenaufbaus bei einer Papier- oder Pappmaschine

PROCEDURE FOR THE HEATING OF A ROLLER AND HEATED ROLLER, IN PARTICULAR PRESSWALZE FOR A PAPER-MAKING MACHINE

ANORDNUNG FÜR WÄLZLAGER

GERILLTE SHEET FORMING ROLLER

ROLLER FOR THE PAPER PRODUCTION AND PROCEDURE FOR THEIR PRODUCTION.

METHOD FOR REGULATING LOADING OF AN ADJUSTABLE-CROWN ROLL AND AN ADJUSTABLE-CROWN ROLL

A method for regulating the loading of an adjustable-crown roll having a stationary roll axle around which a roll mantle is rotatingly mounted, and by means of which roll a nip is formed with a backup roll. The deflection of the roll mantle and/or the linear load in the nip is regulated by loading elements and a backup zone supported on the roll axle and acting upon the inner face of the roll mantle in the direction of the nip plane. Upon the inner face of the roll mantle of the roll by means of the backup zone/zones, a sum force is produced which acts in the nip plane in a direction substantially opposite to the force produced by the loading element, and the force effect applied by the backup zone/zones to the inner face of the roll mantle is applied, examined in the direction of the circumference, to more than one point. The adjustable-crown roll forms a nip with a backup roll and includes a stationary roll axle around which a roll mantle is arranged revolving, between which roll mantle and roll axle loading elements and backup zones are arranged to act upon the inner face of the roll mantle and are supported on the roll axle. The backup zones supported on the roll axle are formed of at least two rows of backup-zone elements or by a backup chamber or by at least one row of backup-zone elements and a backup chamber. The sum force produced by the elements or chamber in the nip plane is in a direction substantially opposite to the force produced by the row of loading elements.

Method in the production of a paper-machine stone roller

In the production of paper-machine stone rollers, a significant disadvantage which has been observed is that bending occurs in a stone roller which has been ground completely straight and finish-polished. These bends are very disadvantageous in the operation of the stone roller if it is used as a press roller since the bends cause a non-uniform press pressure distribution which manifests itself in a non-uniform moisture profile of a web treated in the press. To eliminate these disadvantages, the invention describes a method in the production of a paper-machine stone roller, in particular a press roller, in which method the bends which occur during the operation of the stone roller are reduced or eliminated. In the method, the cylinder shell (10) of the stone roller is ground to its final form at a temperature which corresponds essentially to the prevailing operating temperature of the stone roller concerned in the paper machine. This temperature is generally about 35...55 DEG C. ...

PROCEDURE AND DEVICE FOR CONDITIONING THE COATING OF A ROLLER IN A PAPER-MAKING MACHINE

PROCEDURE FOR THE ADJUSTMENT OF THE DISTRIBUTION OF LOAD OF A DEFLECTION ATTITUDE ROLLER AND DEFLECTION ATTITUDE ROLLER

VERFAHREN ZUM STEUERN VON PAPIERMASCHINEN-NIPWALZEN UND STEUERANORDNUNG FÜR PAPIERMASCHINEN-NIPWALZEN

The method involves providing a regulating valve (8) with actuators, where the actuators react automatically on the rate of change of the load pressure. The actuators of the regulating valve have a slider. A collision of the slider is prevented on a valve body of the regulating valve by automatic damping of the movement speed of the slider with the help of a damping unit that is formed at the slider. An independent claim is also included for a control arrangement with an impression roller for paper machine-nip rollers.

SAUGWALZENANORDNUNG UND ABDICHTLEISTE EINER SAUGWALZE FÜR DAS FORMUNGSTEIL EINER FASERBAHNMASCHINE

VERFAHREN ZUM STEUERN VON PAPIERMASCHINEN-NIPWALZEN UND STEUERANORDNUNG FÜR PAPIERMASCHINEN-NIPWALZEN

Gegenstand der Erfindung ist ein Verfahren zum Steuern von Nipwalzen (2, 20; 2', 20') von Papiermaschinen. Bei dem Verfahren umfassen die Nipwalzen (2, 20; 2', 20') wenigstens eine erste Walze (2, 2') und eine Gegenwalze (20, 20') zur Bildung eines Pressnips (N) zwischen der ersten Walze (2, 2') und der zweiten Walze (20, 20') Die erste Walze (2, 2') umfasst einen feststehenden Träger (3), einen Walzenmantel (4), der um den von hydrostatischen Lagerelementen gestützten Träger (3) rotierbar ist, hydraulische Stellglieder (6, 50), die an dem Träger (3) angeordnet sind und mit denen der Walzenmantel (4) über ein Druckmedium belastet wird, sowie wenigstens ein Lagerelement und/oder wenigstens ein hydraulisches Stellglied (6, 50) je mit einem Regelventil (8) zum schnellen Abbau der hydraulischen Last. Das Regelventil (8) wird mit Stellgliedern (82, 83, 83a, 84, 85, 89, 90) ausgestattet, die automatisch auf die Änderungsgeschwindigkeit des Belastungsdruckes reagieren. Gegenstand der Erfindung ...

Method and system for monitoring the process of separation of a web

METHOD FOR HEATING OF A ROLL AND A HEATABLE ROLL

The invention concerns a heated roll and a method for heating of a roll, in particular of a press roll or calender roll in a paper or board machine. The roll has a hollow, tubular roll mantle, According to the invention, the roll is heated with electric current by means of electrical resistors fitted inside the body material of roll mantle. The heating is preferably applied to the roll substantially at the proximity of the face of the roll mantle, and the electric current may be supplied to the electrical resistors from the ends of the roll through glide rings.

BLADE DEVICE IN A PAPER-MAKING MACHINE

VERFAHREN ZUM STEUERN VON PAPIERMASCHINEN-NIPWALZEN UND STEUERANORDNUNG FÜR PAPIERMASCHINEN-NIPWALZEN

The method involves providing a regulating valve (8) with actuators, where the actuators react automatically on the rate of change of the load pressure. The actuators of the regulating valve have a slider. A collision of the slider is prevented on a valve body of the regulating valve by automatic damping of the movement speed of the slider with the help of a damping unit that is formed at the slider. An independent claim is also included for a control arrangement with an impression roller for paper machine-nip rollers.

ARRANGEMENT FOR ANTIFRICTION BEARINGS

HEATABLE ROLLER.

ROLLER FOR A PAPER OR A BOARD MACHINE AND A PROCEDURE FOR THE PRODUCTION OF THE ROLLER

ANORDNUNG FÜR WÄLZLAGER

PROCEDURE IN THE MANUFACTURING OF A STONE ROLL FOR A PAPER MACHINE

METHOD FOR MANUFACTURING A STONE ROLL FOR A PAPER MACHINE A method for manufacturing a stone roll, particularly a press roll, of a paper machine is characterized by grinding the cylindrical shell of the stone roll to its final shape at substantially the same temperature at which the stone roll will operate in the paper machine. In this manner, a significant drawback, wherein stone rolls ground to perfect straightness and ultimate gloss tend to develop temperature-induced deflections which in turn cause non-uniform distribution of the nip pressure manifesting itself in a non-uniform moisture profile of the web treated in the press, is eliminated.

ROLL FOR USE IN THE PRODUCTION OF PAPER AND METHOD FOR THE MANUFACTURE OF THE ROLL

CARING DOCTOR BLADE AND METHOD FOR MANUFACTURE OF SAME

The invention concerns a caring doctor blade for a paperboard machine, which blade comprises layers of fibreglass and carbon fibre and a caring layer as a rigid laminated structure, which caring layer comprises carbon fibres and grinding particles in direct vicinity of the carbon fibres. The orientation of the fibreglass layers is parallel to the longitudinal axis of the blade, and at least in some of the layers that contain carbon fibre the orientation of the carbon fibres is substantially diverging from the direction of the longitudinal axis of the blade. The invention also concerns a method for manufacture of a doctor blade for a paperboard machine by means of a pultrusion method.

Method for sealing of a wearing face

METHOD AND DEVICE FOR CONDITIONING THE COATING OF A PAPER MACHINE ROLL

A method and device for conditioning a ceramic or metalceramic coating of a paper machine roll at its operating site. The roll is ground periodically by a grinding member mounted on a doctor of the roll. The grain size of the grinding particles in the grinding member, i.e., the average diameter of the particles, is in the range of from about 15 to about 200 .mu.m. In the grinding situation, the roll is rotated in its site of operation, and the grinding member is pressed with a force into contact with the face to be ground, whereby, if the face to be ground is excessively rough, it is smoothed to the desired value of surface roughness and, in a corresponding manner, an excessively smooth face is roughened to the desired surface roughness value determined by the grinding member.

Papier- oder Kartonmaschine sowie Verfahren zum Überführen einer Papier- oder Kartonbahn in einer Papier- oder Kartonmaschine

Papier- oder Kartonmaschine, mit einer Pressenpartie (P), einer Trockenpartie (K) und einer Transfervorrichtung zum Überführen einer Papier- oder Kartonbahn (W) von der Pressenpartie (P) zu der Trockenpartie (K), wobei die Transfervorrichtung ein Transferband (H100) aufweist, das durch den Pressspalt (N1) einer letzten Presse (10a1, 10a2) der Pressenpartie (P) verläuft, wobei das Transferband (H100) eine solche Haftwirkung hat, dass die Bahn (W) nach dem Pressspalt (N1) der letzten Presse (10a1, 10a2) am Transferband (H100) haftet, wobei das Transferband (H100) die an ihm haftende Bahn (W) zu einer ersten Trockenzylindergruppe (RI) der Trockenpartie (K) weiterleitet, und wobei eine Aufpralltrocknungseinheiten (11a1, 11a2) aufweisende Wärmezufuhreinrichtung zum Zuführen von Wärmeenergie zu der am Transferband (H100) haftenden Bahn (W) vorgesehen ist, dadurch gekennzeichnet, dass in Laufrichtung der Bahn (W) nach der letzten Presse (10a1, 10a2) und vor der ersten Trockenzylindergruppe (RI ...

Verfahren zur Regulierung der Lastverteilung einer Durchbiegungseinstellwalze und Durchbiegungseinstellwalze

CARING DOCTOR BLADE AND METHOD FOR MANUFACTURE OF SAME

The invention concerns a caring doctor blade for a paperboard machine, which blade comprises layers of fibreglass and carbon fibre and a caring layer as a rigid laminated structure, which caring layer comprises carbon fibres and grinding particles in direct vicinity of the carbon fibres. The orientation of the fibreglass layers is parallel to the longitudinal axis of the blade, and at least in some of the layers that contain carbon fibre the orientation of the carbon fibres is substantially diverging from the direction of the longitudinal axis of the blade. The invention also concerns a method for manufacture of a doctor blade for a paperboard machine by means of a pultrusion method.

Scraper blade, for belts and soft roller mantles at paper/cardboard production machines, has a layer of a softer material than the blade acting on the scraped surface to prevent damage to it

To scrape the belt or soft roller mantle at a papermaking or cardboard production machine, the scraper blade (14) is of a material which is less hard than the surface (10) being scraped. The softer material is in a layer (15) across the scraper blade width, with a thickness which is at least half the scraper blade thickness. It has a support structure (16) which forms the blade, together with the covering layer. In an unused scraper blade, the support structure extends to a given gap from the contact point between the scraper blade and the scraped surface. The scraper blade, for the belt or soft roller mantle at a paper/cardboard production machine, has a support structure within the covering layer, at the upper and/or lower side. The support structure, of a metal or compound plastics material, extends as far as the wear reserve length of the scraper blade, with a thickness of 5-40% of the scraper blade thickness, and preferably 15-30%. The end of the support structure is rounded and/or ...

Schabereinheit für Papiermaschinen

Doctor unit in a paper machine

METHOD FOR HEATING A ROLL AND A HEATABLE ROLL, IN PARTICULAR A PRESS ROLL FOR A PAPER MACHINE

ABSTRACT A heatable roll, in particular a press roll or equivalent for a paper machine, which roll is in direct contact with the paper web and a method for heating a roll are disclosed. The roll is heated by flowing a heat transfer medium into the roll. The medium is preferably arranged to circulate in bores formed into a roll mantle in proximity to an outer face of the roll. The outer face of the roll is provided with a coating made of a ceramic, metal-ceramic mixture, porous metal or an equivalent material whose thermal conductivity and modulus of elasticity are lower than the corresponding properties of the material of the roll body. The coating is porous, and its thickness is from about 0.03 mm to about 6 mm, preferably from about 0.05 mm to about 2 mm.

Verfahren zum Überwachen des Betriebs einer Rakelbaugruppe bei einer Papiermaschine und Rakelbaugruppe zum Ausführen dieses Verfahrens

Verfahren zum Überwachen des Betriebs einer Rakelbaugruppe bei einer Papiermaschine, wobei das Rakelelement (18), das zu dieser Rakelbaugruppe (16) gehört, zum Abkratzen von Material von einer sich bewegenden Oberfläche (17) verwendet wird, und wobei bei dem Verfahren Erfassungsvorrichtungen (20), die in Verbindung mit der Rakelbaugruppe (16) angeordnet sind, zum Überwachen des Betriebs der Rakelbaugruppe (16) verwendet werden und, wenn ein Durchfallen des Rakelelementes (18) auftritt, zusammen mit den mit den Erfassungsvorrichtungen (20) verbundenen Steuervorrichtungen (14-14'') der Papiermaschine die erforderlichen Maßnahmen zum Hinunterlaufen der Bahn, die bei der Papiermaschine hergestellt wird, ausführen, bevor das Durchfallen der Rakelbaugruppe (16) überwacht wird, um die durch das Durchfallen bewirkte Fehlfunktion zu beseitigen und Reparatur- und/oder Schutzmaßnahmen auszuführen, dadurch gekennzeichnet, dass die Erfassungsvorrichtungen (20) nach dem Rakelelement (18) angeordnet sind ...

Verfahren und Vorrichtung zum Verändern der Eigenfrequenz eines Spaltwalzenaufbaus bei einer Papier- oder Pappmaschine

Verfahren zum Verändern der Eigenfrequenz eines Spaltwalzenaufbaus in einer Papier- oder Kartonmaschine, dadurch gekennzeichnet, dass die Eigenfrequenz des Spaltwalzenaufbaus verändert wird, indem die Steifigkeit zumindest eines Lastelementes (11, 31, 41, 42; 60) des Spaltwalzenaufbaus in Abschnitten entlang der Erstreckungsrichtung des Lastelementes (11, 31, 41, 42; 60) verändert wird durch – Ändern des Ortes zumindest eines von mehreren entlang der Längsrichtung des Lastelementes (11, 31, 41, 42) versetzbaren Kraftangriffspunkten (F) oder – Ändern der Größe der Einwirkkraft (F1, F2) zumindest eines von mehreren Kraftangriffspunkten (71, 72) am Lastelement (60), wobei der Spaltbetrieb des Spaltwalzenaufbaus dabei unbeeinflusst bleibt.

Method and Device for Conditioning the Coating of a Paper Machine Roll

METHOD FOR REGULATING LOADING OF AN ADJUSTABLE-CROWN ROLL AND AN ADJUSTABLE-CROWN ROLL

A method for regulating the loading of an adjustable-crown roll having a stationary roll axle around which a roll mantle is rotatingly mounted, and by means of which roll a nip is formed with a backup roll. The deflection of the roll mantle and/or the linear load in the nip is regulated by loading elements and a backup zone supported on the roll axle and acting upon the inner face of the roll mantle in the direction of the nip plane. Upon the inner face of the roll mantle of the roll by means of the backup zone/zones, a sum force is produced which acts in the nip plane in a direction substantially opposite to the force produced by the loading element, and the force effect applied by the backup zone/zones to the inner face of the roll mantle is applied, examined in the direction of the circumference, to more than one point. The adjustable-crown roll forms a nip with a backup roll and includes a stationary roll axle around which a roll mantle is arranged revolving, between which roll mantle ...

ROLL FOR USE IN THE PRODUCTION OF PAPER AND METHOD FOR THE MANUFACTURE OF THE ROLL

The invention concerns a roll for use in the production of paper, in particular a renter roll in a press section of a paper making machine, with which the web is in direct contact and from which the web is detached. In the invention, a composite structure has been formed onto the cylinder mantle of the roll. According to the invention, the roll face is provided with a surface layer which protects the roll from wear and which provides good properties for detaching of the web, this surface layer being formed by thermal spraying of a powder wherein metal and ceramic phases are in the same powder particle. The roll face is additionally provided with a dense layer for protection against corrosion, which layer is made of stainless steel whose chromium content is 10 to 29% and which layer is placed between the surface layer and the roll mantle. The function of the layer for protection from corrosion is to protect the roll mantle from corrosion and to promote the adhesion of the surface coating to the roll. The invention also concerns a method for the manufacture of the roll.

Device and method in the transfer of the paper or board web in the paper or boardmachine

ROLL FOR A PAPER OR BOARD MACHINE, METHOD FOR MANUFACTURING THE SAME AND COATING COMPOSITION THEREFOR

A roll for use in the manufacture of paper and board has a ceramic layer having a thickness of from about 100 µm to about 2000 µm and including from about 50% to about 95% by weight of Cr2O3 and from about 3% to about 50% by weight of TiO2. The outer face of the ceramic layer is finished until the roughness Ra is from about 0.2 µm to about 2.0 µm.

Roller bearing arrangement for conveyor belt manufacturing machines comprises roller bearings connected to supplementary bearing with regulated loading of roller bearing being controlled

The roller bearing arrangement consists of roller bearings (2, 3, 4) with a supplementary bearing (5, 6, 8, 9, 10, 11) connected to it and whose loading can be regulated to a desired value. The loading of the supplementary bearing may be achieved via spring force or magnetic force or via the basis of the heat coefficient/transfer from a pressure cylinder (8, 8', 9, 9', 10, 10' 11, 11') that may be pneumatic or hydraulic. The regulation of the loading of the roller bearing may be controlled.

Beheizbare Walze.

Press and drying zones assembly of a paper sheet forming machine

Press and drying zones assembly of a paper sheet forming machine.

Equipment and method for passing a paper/board web into a pulper

Suction roller arrangement for fiber web machine, has edge region with contact edge and chamfer at input side of window bar to produce synchronized flow connection between suction box and surrounding

The arrangement has a suction roller (10) with a perforated casing (15), and a suction box (25) that is arranged inside the casing. The suction box contains an area (30), and is provided with a window bar (100) that is arranged in connection with an inner surface of the casing. An edge region has a contact edge and chamfer at an input side (110) of the window bar to produce a synchronized flow connection between the suction box and the surrounding, where the flow connection is made over holes (20) at the casing.

Walze für eine Papier- oder Kartonmaschine und Verfahren zur Herstellung der Walze

Gerillte Blattbildungswalze

Verfahren zur Heizung einer Walze und beheizte Walze, insbesondere Presswalze für eine Papiermaschine

First drying sections of paper-making machines using web support transfer belts - with the belt having good adhesion properties replacing conventional wire draw means and running at higher speeds

A paper/board web(W) passes through the last nip press of the machine press section sandwiched between a press felt(Hn) and a smooth faced transfer belt(H100) with good web adhesion properties. The web is transferred to the belt(H100) for passage through a first drying group(RI) supported on the belt face. The web is then passed to a conventional single draw wire(H2) in a second drying group(RII).

Method and device for changing the natural frequency of a nip roll construction in a paper or board machine

Walze für die Papiererzeugung und Verfahren zu deren Herstellung.

Device and method in the transfer of the paper board web in the paper or board machine

The invention concerns an equipment and a method in the transfer of a paper/board web in a paper or board machine. In an embodiment of the invention, the dryer section comprises at least one group of drying cylinders in which, instead of a conventional wire draw, a transfer belt (H100) is employed, to which the web (W) is affixed by effect of adhesion and which transfer belt is passed over drying cylinders (K1, K2, . . . ) and reversing rolls (E1, E2, . . . ) and further in said group (RI) of drying cylinders in the dryer section. The invention also concerns a method in the transfer of the web (W) in the dryer section (K) of a paper/board machine. In an embodiment of the invention, the web (W) is passed, while meandering in loop shape and while adhering to the face of the transfer belt (H100), from a drying cylinder (K1) in the group (RI) of drying cylinders in the dryer section (K) onto a reversing roll (E1) and further from the reversing roll onto the next drying cylinder (K2) and further ...

Verfahren zur Regulierung der Lastverteilung einer Durchbiegungseinstellwalze und Durchbiegungseinstellwalze

ROLL OF PAPER MACHINE/BOARD MACHINE OR FINISHING MACHINE, ITS PRODUCTION, AND COATING COMPOSITION THEREFOR

PROBLEM TO BE SOLVED: To obtain a more durable and improved ceramic roll, to provide a method for producing the roll, and further to obtain a coating composition for the roll. SOLUTION: This invention relates to a roll for producing a paper and a paperboard, a press roll, especially a center roll in a press part, a backup roll of an extended nipping and pressing roll, a hot pressing roll directly contacting with a wet paper web or an equivalent thereof, or a calender roll, and a method for producing the roll, and further a coating composition for the roll. The roll is produced by firstly coating an adhered layer 2 on a flame part 1 of the roll, further coating a ceramic layer 3 comprising 50-95% Cr2O3 and 3-50% TiO2, or Ai2O3 and ZrO2 or Al2TiO5 and having 100-200 μm thickness and regulated so that the roughness Ra of the outer surface of the roll may be 0.4-2.0 μm, and the porosity of the outer surface may be 1-20%. The ceramic layer 3 can contain an oxide of aluminum, silicon, zirconium ...

Verfahren und Vorrichtung zum Konditionieren der Beschichtung einer Walze in einer Papiermaschine

Streifeneinrichtung und verbesserte Saugwalze für eine Materialbahnmaschine und Aufbau und Verfahren zum Verbessern der Haltbarkeit der Saugwalze

Streifeneinrichtung für eine Materialbahnmaschine, wobei die Streifeneinrichtung beispielsweise ein Abdichtstreifen zum Abdichten einer Saugwalze und/oder ein Entwässerungsstreifen zum Entfernen von Wasser von der Oberfläche der Walze sein kann, wobei die Streifeneinrichtung (1) ein längliches Streifenelement (3) und ein längliches Streifenprofil (2) aufweist, das beispielsweise ein in der Richtung einer zugewandten Fläche offenes U-Profil ist und das als ein Halter des Streifenelementes so fungiert, dass das Streifenelement an dem Halter sitzt, wobei das Streifenelement in einer Querrichtung in Bezug auf seine Länge angeordnet ist und im Wesentlichen zweilagig in seiner Belastungsrichtung ist, von dem Profilelement hervorragt und zumindest bei Belastung an einer zugewandten Fläche (41) angeordnet ist, die sich in einer in Bezug auf die Länge des Streifenelementes im Wesentlichen quer verlaufenden Richtung bewegt, dadurch gekennzeichnet, dass eine erste Lage (31) des Streifenelementes ( ...

Anordnung zum Schaben eines Bandes oder eines weichen Walzenbezugs in Papier- oder Kartonmaschinen

Vorrichtung und Verfahren zum Transfer der Papier- oder Kartonbahn in der Papier- oder Kartonmaschine

Method for heating of a roll and a heatable roll

A heated roll and a method for heating of a roll, in particular of a press roll or calender roll in a paper or board machine. The roll has a hollow, tubular roll mantle. The roll is heated with electric current by means of electrical resistors fitted inside the body material of roll mantle. The heating is preferably applied to the roll substantially at the proximity of the face of the roll mantle, and the electric current may be supplied to the electrical resistors from the ends of the roll through glide rings.

Method for monitoring the operation of a doctor assembly in a paper machine and a doctor assembly for implementing the method

The operation of a doctor assembly ( 16 ) in a paper machine is monitored. In case of a malfunction, the paper machine's ( 10 ) control devices ( 14 - 14′, 15 ) are used to carry out the necessary measures for eliminating the malfunction and carrying out repair and/or protective measures. In addition, detector devices ( 20 ) are arranged in connection with the doctor assembly ( 16 ), to detect a malfunction. The detector devices ( 20 ) are connected to the control devices ( 14, 14′, 15 ) of the paper machine ( 10 ), in order to carry out the said measures automatically. The invention also relates to doctor assemblies in a paper machine for implementing the method.

Verfahren zur Regulierung der Lastverteilung einer Durchbiegungseinstellwalze und Durchbiegungseinstellwalze

Verfahren zur Heizung einer Walze und beheizte Walze, insbesondere Presswalze für eine Papiermaschine

Roller for e.g. fibrous web machine, has lining produced by spirally winding metal bands around outer surface of cylindrical roller body, where metal bands are made of ferritic-austenitic non-rusting steel material i.e. duplex steel

The roller (10) has a cylindrical roller body (15) provided at an outer side. A lining (25) surrounds an outer surface of the roller body and is produced by spirally winding metal bands (25.1, 25.2) around the outer surface. The metal bands are made of ferritic-austenitic non-rusting steel material i.e. duplex steel. The metal band contains less than 8 percentage of nickel, less than 1 percentage of molybdenum and more than 20 percentage of chromium. A support element is arranged inside a roll shell of the roller body. An independent claim is also included for a method for manufacturing a roller for a fiber web machine.

Verfahren und System zur Überwachung des Abtrennvorgangs einer Bahn

Verfahren zur Überwachung des Abtrennvorgangs einer Bahn, in welchem Verfahren die Bahn (W) von einer Walze (21) in einen freien Zug der Bahn (W) überführt wird, wobei in dem Verfahren die Abtrennstelle (B) der Bahn (W) oder eine damit vergleichbare Stelle der Bahn (W) vermessen wird, an der die Bahn (W) von der Walze (21) in den freien ungestützten Zug überführt wird, und wobei in dem Verfahren die Zugdifferenz, d. h. die Geschwindigkeitsdifferenz der Bahn (W) in der Abtrennstelle (B) gemessen wird, dadurch gekennzeichnet, dass die Ergebnisse der an der Abtrennstelle erhaltenen Messung (31) und der Zugdifferenz (36) in ein Datensammelsystem (13) und/oder in ein Analysesystem (14) transferiert werden, wobei in dem Datensammelsystem (13) die Zugdifferenz (36) hinsichtlich der Zeitdauer auf den gleichen Maßstab wie die Vermessung der Abtrennstelle (31) eingestellt wird, um die Ursache-Wirkungs-Beziehung im Abtrennvorgang herzuleiten, und dass in dem Analysesystem (14) die Messergebnisse ( ...

Caring doctor blade and method for manufacture of same

A caring doctor blade for a paper/board machine having layers of fiberglass and carbon fibers, and a caring layer as a rigid laminated structure, where the caring layer has carbon fibers and grinding particles in direct proximity to the carbon fibers. The orientation of the fiberglass layers is parallel to the longitudinal axis of the blade. At least some of the layers that contain carbon fibers. The orientation of the carbon fibers is substantially diverging from the direction of the longitudinal axis of the blade. A method for manufacturing the doctor blade for a paper/board machine by a pultrusion method is also disclosed.

Verfahren und Vorrichtung zum Konditionieren der Beschichtung einer Walze in einer Papiermaschine

Verfahren zum Überwachen des Betriebs einer Schaberbaugruppe in einer Papiermaschine und Schaberbaugruppe zum Ausführen dieses Verfahrens

Verfahren zum Überwachen des Betriebs eine Schaberbaugruppe in einer Papiermaschine, wobei das Schaberelement (18), das zu dieser Schaberbaugruppe (16) gehört, zum Abschaben von Material von einer sich bewegenden Oberfläche (17) verwendet wird, und wobei bei dem Verfahren Detektorvorrichtungen (20), die in Verbindung mit der Schaberbaugruppe (16) angeordnet sind, zum Überwachen des Betriebs der Schaberbaugruppe (16) verwendet werden und beim Auftreten eines Bahndurchtretens beim Schaberelement (18) zusammen mit den mit den Detektorvorrichtungen (20) verbundenen Steuervorrichtungen (14 - 14'') der Papiermaschine die erforderlichen Maßnahmen zum Herabfallen der Bahn, die in der Papiermaschine hergestellt wird, ausführen, bevor das Bahndurchtreten beim Schaberelement (18) der Schaberbaugruppe (16) festgestellt wird, um die durch das Bahndurchtreten bewirkte Fehlfunktion zu beseitigen und Reparatur- und/oder Schutzmaßnahmen auszuführen, dadurch gekennzeichnet, dass die Detektorvorrichtungen ...

Caring doctor blade and method for manufacture of same

The invention concerns a caring doctor blade for a paper/board machine, which blade comprises layers of fiberglass and carbon fiber and a caring layer as a rigid laminated structure, which caring layer comprises carbon fiber and grinding particles in direct vicinity of the carbon fibers. The orientation of the fiberglass layers is parallel to the longitudinal axis of the blade, and at least in some of the layers that contain carbon fiber the orientation of the carbon fibers is substantially diverging from the direction of the longitudinal axis of the blade. The invention also concerns a method for manufacture of a doctor blade for a paper/board machine by means of a pultrusion method.

Roll for a paper or board machine

A roll for use in the manufacture of paper and board, a press roll, in particular a center roll in a press, a backup roll for an extended-nip press roll, a hot press roll, or equivalent, which is in direct contact with a wet paper web, or a calender roll, a method for manufacturing the same and a coating composition therefor including an adhesion layer arranged on the frame part of the roll and a ceramic layer arranged on the adhesion layer. The ceramic layer has a thickness of from about 100 mum to about 2000 mum and includes from about 50% to about 95% by weight of Cr2O3 and from about 3% to about 50% by weight of TiO2, or from about 50% to about 80% by weight of Al2O3 and from about 20% to about 50% by weight of ZrO2, or exclusively Al2TiO5. The outer face of the ceramic layer is finished until the roughness Ra is from about 0.2 mum to about 2.0 mum and/or the porosity of the outer face of the roll is from about 1% to about 20%. In addition to or instead of TiO2, the ceramic layer may ...

Walze für die Papiererzeugung und Verfahren zu deren Herstellung.

Doctor unit in a paper machine

A doctor unit in a paper machine includes a blade carrier having a blade holder fitted to the blade carrier. A doctor blade is mountable in the blade holder to doctor a roll or similar moving surface. The blade holder and/or doctor blade include one or more sensors installed inside the construction or on its surface. The sensors are arranged to measure the wear of and/or stress in the blade holder and/or doctor blade.

Verfahren und System zur Überwachung des Abtrennvorgangs einer Bahn

Beheizbare Walze.

Method and equipment in conditioning of the coating on a roll in a paper machine

Arrangement for doctoring a belt or a soft roll surfacing in a paper or board machine

An arrangement for doctoring a belt or a soft roll surfacing in a paper or board machine includes a doctor set in connection with a surface with a doctor blade fitted in it for doctoring the surface. The doctor blade is at least partly of a material, the hardness of which is essentially equal to or less than the hardness of the material of the surface, in order to prevent the doctor blade from cutting into the surface. The material is arranged to form a layer extending over the entire width of the doctor blade, and the thickness of which throughout is at least half of the thickness of the doctor blade. A support construction is arranged in the doctor blade, which together with the layer is arranged to form the doctor blade.

Grooved forming roll

A grooved forming roll in a paper machine has a rotably supported shell (20) with circular openings (21) arranged to be open at least on the outer surface of the shell (20). Each opening (21) has a circular groove which is formed on the outer surface and which is arranged concentrically relative to the opening (21). A portion of the formed circular openings (22) extends to each opening (21) from each adjacent opening (21). The outer radius (r) of the circular groove (22) is arranged such that the number of necks (24), delimited by the adjacent openings (21) and their circular grooves (22) on the shell outer surface within the area of one circular groove (22), is greater than the number of the adjacent openings (21) of the corresponding opening (21).

ROLL FOR USE IN PRODUCTION OF PAPER AND METHOD FOR MANUFACTURE OF ROLL

Grooved forming roll

A grooved forming roll in a paper machine has a rotably supported shell ( 20 ) with circular openings ( 21 ) arranged to be open at least on the outer surface of the shell ( 20 ). Each opening ( 21 )has a circular groove is formed on the outer surface arranged concentrically relative to the opening ( 21 ). A portion of the formed circular openings ( 22 ) extends to each opening ( 21 ) from each adjacent opening ( 21 ). The outer radius (r) of the circular groove ( 22 ) is arranged such that the number of necks ( 24 ), delimited by the adjacent openings ( 21 ) and their circular grooves ( 22 )on the shell outer surface within the area of one circular groove ( 22 ), is greater than the number of the adjacent openings ( 21 ) of the corresponding opening ( 21 ).

Method and system for monitoring the process of separation of a web

A method and system for monitoring a separation process of a web in a paper machine in which the web is separated from a roll and passed into a free draw, which is preferably the first free draw of the web in the paper machine. A separation point of the web from the roll and a difference in speed of the web across the separation point, i.e., the draw difference, are measured. Cause-to-effect ratios in the separation process are established, e.g., in a data collecting system or analysis system, based on the measurements of the separation point and the speed difference. At least one additional process or running parameter of the paper machine is measured and the measurements of the separation point and the speed difference are compared with the additional process or running parameter(s) to thereby determine the manner in which the separation process of the web is affected by the additional process or running parameter(s).

Arrangement in connection with the press and dryer section of a web forming machine

An arrangement in connection with the press and dryer section of a web-forming machine includes first and second devices for transporting the web. The second device includes a dryer wire and a roll arranged to support it. In the arrangement there is an open gap between the first and second devices, across which the web is arranged to be transferred, so that the web and the dryer wire form a closing throat. The arrangement further includes a deflector before the open gap in the direction of travel of the dryer wire, which is arranged close to the dryer wire, in order to restrict the air layer travelling with the dryer wire, and thus to prevent the formation of an excess pressure in the closing throat.

Grooved forming roll

Method and equipment for conditioning coating on roll of paper-making machine

Method for manufacturing a paper or board machine and coating composition therefor

A roll for use in the manufacture of paper and board, a press roll, in particular a center roll in a press, a backup roll for an extended-nip press roll, a hot press roll, or equivalent, which is in direct contact with a wet paper web, or a calender roll, a method for manufacturing the same and a coating composition therefor including an adhesion layer arranged on the frame part of the roll and a ceramic layer arranged on the adhesion layer. The ceramic layer has a thickness of from about 100 mum to about 2000 mum and includes from about 50% to about 95% by weight of Cr2O3 and from about 3% to about 50% by weight of TiO2, or from about 50% to about 80% by weight of Al2O3 and from about 20% to about 50% by weight of ZrO2, or exclusively Al2TiO5. The outer face of the ceramic layer is finished until the roughness Ra is from about 0.2 mum to about 2.0 mum and/or the porosity of the outer face of the roll is from about 1% to about 20%. In addition to or instead of TiO2, the ceramic layer may ...

Grooved forming roll

A grooved forming roll in a paper machine has a rotably supported shell ( 20 ) with circular openings ( 21 ) arranged to be open at least on the outer surface of the shell ( 20 ). Each opening ( 21 ) has a circular groove is formed on the outer surface arranged concentrically relative to the opening ( 21 ). A portion of the formed circular openings ( 22 ) extends to each opening ( 21 ) from each adjacent opening ( 21 ). The outer radius (r) of the circular groove ( 22 ) is arranged such that the number of necks ( 24 ), delimited by the adjacent openings ( 21 ) and their circular grooves ( 22 ) on the shell outer surface within the area of one circular groove ( 22 ), is greater than the number of the adjacent openings ( 21 ) of the corresponding opening ( 21 ).

Method and device for changing the natural frequency of a nip roll construction in a paper or board machine

The invention concerns a method and a device for changing the natural frequency of a nip roll construction in a paper or board machine so that the rigidity of one or several loading elements, for example loading cylinder or loading beam, in the nip roll construction is varied. The loading cylinder with adjustable rigidity in accordance with the invention comprises a cylinder (11), into which two pistons (12, 13) have been fitted. The pistons (12, 13) have been attached each of them to a piston rod (14, 15) of its own, which piston rods have been passed through the end walls (11a, 11b) of the cylinder (11). Thus, in the cylinder (11), between the pistons (12, 13), a work pressure space (16) is formed, and at the opposite sides of the pistons (12, 13) counter-pressure spaces (18, 20) are formed. The pressure in and the volume of the work pressure space (16) are kept invariable, and the volumes of the counter-pressure spaces (18, 20) are varied, in which connection the cylinder (11) moves ...

GROOVED FORMING ROLL

【課題】 ウェブマーキングを防止できる溝付き成形ロールを提供すること。 【解決手段】 溝付き成形ロールは、回転可能に支持されたシェル（２０）を含み、そのシェル（２０）の外表面上で少なくとも開口されるように配置された円形開口部（２１）を含んでいる。その外表面に形成された各開口部（２１）に関連して、円形溝（２２）があり、その溝は対応する開口部（２１）に関し同心円状に配置されている。更に、その外表面で、形成された円形開口部（２２）の一部分は、各隣接する開口部（２１）から各開口部（２１）に延伸している。円形溝（２２）の外径（ｒ）は、一つの円形溝内で、隣接する開口部（２１）とシェル外表面上のそれらの円形溝（２２）によって境界を定められる首部（２４）の数は、対応する開口部（２１）の隣接する開口部（２１）の数より大きい。 【選択図】 図１

Method and apparatus in the surface sizing of a paper or board web

An applicator device ( 1 ) applies surface size to at least one side of a web (W). A pressure effect is applied to the web (W) by subjecting the web (W) to an underpressure and/or to an overpressure such that surface size is forced to penetrate into the pores of the web. Most advantageously, an underpressure is created that sucks applied surface size from the surface of the web (W) into the pores in the inner layers. Surface size is applied to a web first side (W 1 ) and a vacuum effect is applied to the web's opposite side (W2) to cause air to flow through the web (W) such that surface size moves from the first side (W 1 ) in the direction of the second side (W 2 ) into the web (W). Correspondingly, both sides of the web (W) can be treated in successive stages.

Arrangement for scraping a belt of a paper or board machine or a soft roll cover

Roller for a fiber web machine

A strip means and an improved suction roll for a material web machine and an arrangement and a method for improving the duration of the suction roll

A strip means for a material web machine, which strip means (2, 3) may be a sealing strip of a suction roll (4), which sealing strip includes a longitudinal strip element (3) and a longitudinal holder (2) of the strip element shaped as a U profile open in the direction of a facing surface (41). The strip element, which is two-layered in a transverse direction with respect to its length, protrudes from the holder and, at least when loaded, is against the facing surface, which moves substantially in a transverse direction with respect to the length of the strip element. A first layer (31) of the strip element is of an easily adjusting material and a second layer (34) of the strip element is of a stiffer material in the loading direction than the first layer. In this way the loading of the strip element in the holder can be selected so that the strip element or its edge does not substantially bend in the direction of the movement of the facing surface. The invention also relates to an improved suction roll for a material web machine for improving the duration of the suction roll. A strip element is against a facing surface inside a perforated (7) mantel of the suction roll when a loading means (5) loads the strip element in a holder. In particular, in order to reduce the effects of the abrasion of the strip element, optionally: an inner surface of the mantel is surface treated by means of grain blasting, a thermal injection coating, a chemical or electro¬ chemical precipitation coating and/or a polymer-based coating; and/or a lubricant or additive is fed between surfaces abrading against each other; and/or at least part of suction holes in a wall of the mantel are broached (71 ) at the side of the facing surface inside the mantel. In addition, the invention relates to an arrangement for improving the duration of a suction roll. A strip element is against a facing surface inside a perforated mantel of the suction roll when a loading means loads it in a holder against ...

Paper machine scraper

A method for monitoring the operation of a paper machine scraper apparatus and a paper machine scraper apparatus implementing the method

A method and apparatus for changing the characteristic frequency of a nip roll structure of a paper or board machine

Arrangement for doctoring a belt or a soft roll surfacing in a paper or board machine

An arrangement for doctoring a belt or a soft roll surfacing in a paper or board machine includes a doctor set in connection with a surface with a doctor blade fitted in it for doctoring the surface. The doctor blade is at least partly of a material, the hardness of which is essentially equal to or less than the hardness of the material of the surface, in order to prevent the doctor blade from cutting into the surface. The material is arranged to form a layer extending over the entire width of the doctor blade, and the thickness of which throughout is at least half of the thickness of the doctor blade. A support construction is arranged in the doctor blade, which together with the layer is arranged to form the doctor blade.

Heated roll, especially press roll for paper machine

VALS FOER ANVAENDNING VID PAPPERSFRAMSTAELLNING OCH FOERFARANDE FOER FRAMSTAELLNING AV VALSEN.

Hardware for rebuilding a paper machine roll coating

Method for heating a roll and a heatable roll, in particular a press roll for a paper machine

A heatable roll (10), in particular a press roll or equivalent for a paper machine, which roll is in direct contact with the paper web and a method for heating a roll are disclosed. The roll is heated by flowing a heat transfer medium into the roll. The medium is preferably arranged to circulate in bores (16) formed into a roll mantle in proximity to an outer face of the roll. The outer face of the roll is provided with a coating (18) made of a ceramic, metal-ceramic mixture, porous metal or an equivalent material whose thermal conductivity and modulus of elasticity are lower than the corresponding properties of the material of the roll body. The coating is porous, and its thickness is from about 0.03 mm to about 6 mm, preferably from about 0.05 mm to about 2 mm.

Doctor unit in a paper machine

Roll for a paper or board machine, a method for manufacture of the roll, and a composition of the coating for the roll

The invention concerns a roll for use in the manufacture of paper and board, a press roll, in particular a centre roll in a press, a backup roll for an extended-nip press roll, a hot press roll, or equivalent, which is in direct contact with a wet paper web, or a calender roll, a method for manufacture of the roll. and a composition of coating for the roll. Onto the frame part (1) of the roll, first an adhesion layer (2) is applied, and then a ceramic layer (3) of a thickness of 100...2000 µm. which contains 50...95 % of Cr 2 O 3 and 3...50 % of TiO 2 , or Al 2 O 3 and ZrO 2 , or Al 2 TiO 5 , and the roughness Ra of the outer face of the roll is 0.4...2.0 µm, and the porosity of the outer face of the roll is 1...20 %. Besides, or in stead of, TiO 2 , the ceramic layer (3) may also contain oxides of aluminum, silicon, zirconium, magnesium, manganese, tin, or tungsten or mixtures of same.

Method and equipment in conditioning the coating on a roll in a paper machine.

VALS FOER ANVAENDNING VID PAPPERSFRAMSTAELLNING OCH FOERFARANDE FOER FRAMSTAELLNING AV VALSEN.

Arrangement in connection with the press and dryer section of a web forming machine

An arrangement in connection with the press and dryer section of a web-forming machine includes first and second devices for transporting the web. The second device includes a dryer wire and a roll arranged to support it. In the arrangement there is an open gap between the first and second devices, across which the web is arranged to be transferred, so that the web and the dryer wire form a closing throat. The arrangement further includes a deflector before the open gap in the direction of travel of the dryer wire, which is arranged close to the dryer wire, in order to restrict the air layer travelling with the dryer wire, and thus to prevent the formation of an excess pressure in the closing throat.

Arrangements in connection with the press section and the dryer section in a sheet forming machine

Gerillte blattbildungswalze

Menetelmä ja järjestelmä radan irtoamistapahtuman seuraamiseksi

Rakelvorrichtung in einer papiermaschine

Laitteisto paperikoneen kaavarin yhteydessä ja menetelmä voiteluväliaineen johtamisessa telapinnalle ennen kaavarin terää

Järjestely rainanmuodostuskoneen puristinosan ja kuivatusosan yhteydessä

Parannus telapinnoitteeseen

Uusi keraaminen puristintela, menetelmä telan valmistamiseksi ja telan pinnoitekoostumus

Walze für eine papier- oder kartonmaschine und verfahren zur herstellung der walze

Uritettu rainanmuodostustela

Parannus telapinnoitteeseen

Järjestely kudoksen kunnostamiseksi kuiturainakoneessa

Järjestely kudoksen kunnostamiseksi kuiturainakoneessa

Menetelmä ja järjestelmä radan irtoamistapahtuman seuraamiseksi

Ett torkparti i en pappersmaskin eller kartongmaskin och ett foerfarande vid oeverfoering av banan till pappersmaskinens/kartongmaskinens torkparti

Menetelmä ja laite kaapimen yhteydessä paperi-/kartonkikoneessa

Laitteisto paperikoneen kaavarin yhteydessä ja menetelmä voiteluväliaineen johtamisessa telapinnalle ennen kaavarin terää

Laitteisto paperikoneen kaavarin yhteydessä ja menetelmä voiteluväliaineen johtamisessa telapinnalle ennen kaavarin terää

Paperikoneen tai kartonkikoneen kuivatusosa ja menetelmä rainan siirrossa paperikoneen/kartonkikoneen kuivatuosalla

Parannus telapinnoitteeseen

Paperikoneen vedenpoistoa ja ajettavuutta tehostava kudos ja/tai pinnoite

Roll for a paper/board or finishing machine and method for manufacturing a roll shell

The invention relates to a roll for a paper/board or finishing machine, which is provided with a metal-constructed shell (1). In a roll of the invention, the shell (1) is designed as a composite structure, comprising in the axial direction of the shell at least two components (2, 3) manufactured respectively from a first and a second material, said first and second materials being metals different from each other in terms of the production technique and/or composition thereof, and/or in the depthwise direction of the shell, at least over a portion of the axial length of the shell, at least two layers (4, 5; 6, 7) in which the materials of a first and a second layer, respectively, are metals different from each other in terms of the production technique and/or composition thereof. The invention relates further to a method for manufacturing a roll for a paper/board or finishing machine.

Foerfarande foer att foga delar av valsar i en pappersmaskin i varandra samt en med foerfarandet framstaelld vals i en pappersmaskin.

Laite kaapimen yhteydessä paperi-/ kartonkikoneessa

Imutela

Paperi- tai kartonkikoneen rainanmuodostus- tai imutelan yhteydessä käytettävä viirasukka

Beheizbare walze.

Verfahren zur heizung einer walze und beheizte walze, insbesondere presswalze für eine papiermaschine

Uusi keraaminen puristintela, menetelmä telan valmistamiseksi ja telan pinnoitekoostumus

Imutela

Menetelmä lämmitettävän telan/sylinterin valmistamiseksi ja paperikoneen lämmitettävä tela/sylinteri

Walze für die papiererzeugung und verfahren zu deren herstellung.

Foerfarande foer att foga delar av valsar i en pappersmaskin i varandra samt en med foerfarandet framstaelld vals i en pappersmaskin.

Elastomerband foer anvaendning vid belaeggning av valsar samt en vals, saerskilt en pressvals i en pappersmaskin, som aer belagd med ifraogavarande band.

Aendfog foer stenvals.

Laite kaapimen yhteydessä paperi-/kartonkikoneessa

Verfahren und vorrichtung zum konditionieren der beschichtung einer walze in einer papiermaschine

Menetelmä lämmitettävän telan/sylinterin valmistamiseksi ja paperikoneen lämmitettävä tela/sylinteri

Foerfarande foer att oeka livslaengden av och/eller minska bristningsrisken hos en belastad sugvals en pappersmaskin

Elastomerband foer anvaendning vid belaeggning av valsar samt en vals, saerskilt en pressvals i en pappersmaskin, som aer belagd med ifraogavarande band.

Aendfog foer stenvals.

Kuiturainakoneen muodostusosan imutelajärjestely ja imutelan tiivistelista

Kuiturainakoneen muodostusosan imutelajärjestely ja imutelan tiivistelista

Foerfarande foer framstaellning av en vals foer en pappermaskin och en med foerfarandet framstaelld vals.

Lauhteenpoistolaite