7-substituted coumarin derivative two-photon fluorescent dye and preparation method thereof

The invention discloses 7-substituted coumarin derivative two-photon fluorescent dye. The structural formula is as shown in the specification, wherein R is CH3O- or (CH3)2N-. The fluorescent dye disclosed by the invention is simple to synthesize, and a single-crystal structure is obtained. The fluorescent dye has a big two-photon absorption cross section, can be activated by two-photons to generate fluorescence and has low cytotoxicity, so that the fluorescent dye can enter into cells for bio-imaging of cells.

Tobacco stem moisture regaining method

A method for wetting the peduncle of tobacco leaf in order to cut it into shreds includes such steps as microwave heating, moistening water content 30-40% and storing for a certain time.

Tobacco product worm ovum eradicating method

The invention discloses a method for killing ovums in tobacco products which comprises, drying the tobacco products to moisture percentage below 14%, then elevating temperature by means of microwave heating to the tobacco products. The invention can realize a killing rate of over 99%.

Method and device for material screening and pneumatic lifting

Part cold heading machining method

A part cold heading machining method includes the steps that firstly, a part blank is extruded by a first stamping die (1) to obtain sizes required by head taper and rod necking; secondly, a part (2) obtained in the first step is extruded by a second stamping die (3) to obtain the contour and size of the head of the part; thirdly, the part (2) obtained in the second step is extruded by a third stamping die (4), and a trimming die of a bottom die conducts reverse cutting on the part (2) obtained in the second step to obtain the needed shape and the needed size of the contour of the neck of the part; fourthly, upper and lower double cutting is carried out on the periphery of the head of the part (2) machined in the third step through a fourth stamping die to obtain the shape and size of the contour of the head of the burr-free part, and the whole part cold heading machining process is completed. The part cold heading machining method has the advantages that the utilization rate of materials ...

Method for sorting material in place

The present invention discloses a method for sorting material on the spot and its equipment, specially it is applicable for sorting loose tobacco product. Said method is implemented in a box body capable of transverse air-supplying and vertically air-supplying upwards. Under the feeding hole the transverse supplying air and vertically upwards supplying air can be provided into the box body, the transverse air can levitate and sort material and the vertically-supplying air can make flotation of material, the heavy material can be passed through air inlet and fallen downwards, and the light material can be fallen into the box body, and can be discharged by conveying equipment.

Materials fine sorting method

A method for separating the tobacco shreds from botacco stems features that a separating hopper used also as air inlet is under a case, the raw material is freely dropped down in caid case and then separated by wind and floated at the top mouth of said separating hopper, and the tobacco shreds in the separating hopper are floated up and down.

Method for preventing insect damage of shredded tobacco in storage

The invention discloses a method for insect damages for shredded tobacco during the storing process, which consists of sealing the shredded tobacco storage cabinet, lowering the oxygen concentration in the cabinet to below 5% by means of air regulation, thus making the imago in the cabinet unable to survive, thus achieving the goal of deinsectization.

Peduncle eliminating method from shredded tobacco

The invention discloses a method for rejecting stems from shredded tobacco by utilizing pneumatic concentration process for sorting which comprises, cooling down the dried shredded tobacco to 40-50 deg. C for a first air sorting, thus making most of the shredded tobacco be separated from the stems, then loosening the agglomeration materials into mellow form for a second air sorting. The method provided by the invention can guarantee high quality for shredded tobacco.

Anti - intense beam mold processing of part punching press

The utility model relates to an anti - intense beam mold processing of part punching press, the merciful and peaceful stick that leads to on die, strong stick, die block mould shell, centre form, die block mould shell internal fixation has centre form rear cushion, has placed the spring on the centre form rear cushion, on the centre form in the benevolence activity loading die block mould shell to place in the top of spring, it runs through between the hole of centre form rear cushion epimembranal benevolence in and to lead to the stick, the benevolence up end contacts with the lower extreme facial features of die on the centre form, can reciprocate in die block mould shell, being formed with the cavity on the centre form between benevolence and the die, having placed the mould in the cavity, place the material that needs the punching press in the mould, the upper end that leads to the stick is in in the mould for it needs processing material bottom to withstand, in the lower extreme that ...

Cold heading forming method for deep hole in head of bolt

The invention discloses a cold heading forming method for a deep hole in the head of a bolt. The method sequentially comprises the following steps: 1, extruding the head of the bolt to obtain a conical sunken hole in the middle part of the end face of the bolt and the size and the depth of the sunken hole by virtue of a first stamping die; 2, further stamping the sunken hole of the bolt in step 1 to continuously deepen the sunken hole into a required depth and a required shape by virtue of a second stamping die, and simultaneously extruding the head of the bolt into a contour and a size, which are required by the die; 3, continuing downwards stamping the sunken hole of the bolt in step 2 to enable the periphery of the sunken hole in the head of the bolt to upwards extend according to the requirement of a third stamping die to form a set specification and meet a set requirement through a punch by virtue of the third stamping die; 4, extruding and shearing the inner wall of the sunken hole ...

Hexa-substituted coumarin derivative two-photon fluorescent dye and preparation method thereof

The invention discloses hexa-substituted coumarin derivative two-photon fluorescent dye of which the structural general formula is shown in the specification, wherein R is CH3O- or (CH3)2N-. The fluorescent dye prepared by the invention is simple to synthesize, obtains a monocrystalline structure, has an effective two-photon absorption cross section, can generate fluorescence through two-photon excitation, has low cytotoxicity, and can enter a cell and be used for biological imaging of the cell.

Cold heading punching die

The invention provides a cold heading punching die. The cold heading punching die comprises an upper die and a lower die (2), wherein a concave cavity is formed in the lower die (2); the upper die can move up and down relative to the lower die (2); a positioning rod (21) is vertically arranged in the concave cavity (24) of the lower die; the bottom part of the positioning rod (21) extends out of the bottom part of the lower die (2); a transverse inserting hole (22) is formed in the side face of the lower die (2); a threaded rod is arranged in the transverse inserting hole (22); the upper die comprises a movable die shell (4), a die core and a punching rod (1); the die core is arranged in the movable die shell (4); the movable die shell (4) drives the die core to move up and down; the movable die shell (4) is linked with a driver; the die core comprises a punching head (5) and a punching part; the punching rod (1) can be arranged in a central hole (53) in the middle part of the punching ...

一种物料分选及气力提升方法和装置

An apparatus for separating materials is composed of a vertical lifting tube and a separating box above said lifting tube and communicated with it. A method for separating materials by pneumatic lifting method features that an upward airflow whose speed is higher than the suspending speed of lifted material is in said lifting tube and separating box. The impurities which has higher suspending speed is dropped down in the lifting tube and the material which has lower suspending speed comes in the separating box along the lifting tube.

Forming die for locking thread

The invention discloses a forming die for a locking thread. The forming die comprises an upper die (21) and a lower die (22), wherein the upper die (21) can move up and down to be linked with a driving device; an arc surface (23) for extruding a thread is arranged on the bottom surface of the upper die (21); left and right symmetric arc surfaces (23) are arranged on the left and right sides of the lower die (22); the radius of the arc surface (23) of the upper die is the same as those of the left and right sections of arc surfaces (23) of the lower die (22); when the upper die (21) moves downwards to be closed with the lower die (22), the three sections of arc surfaces are positioned on the same circumferential surface. The forming die has the advantages that the position, where an external thread and an internal thread are matched, of a stud or a bolt is extruded and deformed by the surfaces of the die in a trisection manner to change the shape of an original ordinary thread, and when ...

Forming method for locking thread

The invention discloses a forming method for a locking thread. The forming method comprises a step of forming an ordinary thread (11) and a step of forming a locking thread (12). The step of forming the locking thread (12) is implemented as follows: the part, where the ordinary thread (11) is formed into the locking thread (12), of a stud (1) machined with the ordinary thread (11) is arranged on a die (2) for the locking thread (12), wherein the die (2) for the locking thread (12) comprises an upper die (21) and a lower die (22); the ordinary thread (11) is arranged on two sections of arc surfaces of the lower die (22), the upper die moves downwards to extrude the ordinary thread (11), the ordinary thread (11) is thickened into the locking thread (12) in a required shape, and when the locking thread (12) is matched with an ordinary screw cap or screw hole, the locking thread (12) cannot smoothly pass through the screw cap or the screw hole with the ordinary thread (11), and forms interference ...

Forming method for double-end stud blank

The invention discloses a forming method for a double-end stud blank. The forming method sequentially comprises the following steps: stamping a stud blank to form an outer hexagonal blank section and a conical section by virtue of a first stamping die; stamping the stud blank to sequentially form a fourth stud blank section, a third conical stud blank section, a cylindrical section, a second micro-conical stud blank, a threaded stud blank section, an outer hexagonal blank section and transition sections at corresponding positions from top to bottom by virtue of a second stamping die; further stamping the stud blank to sequentially form a fourth stud blank section, a third stud blank section, a cylindrical section with the same upper and lower external diameters and the greatest stud blank external diameter, a second stud blank section, a first stud blank section, an outer hexagonal section and transition sections meeting set requirements at corresponding positions from top to bottom by ...

Part head cold heading edge cutting processing mold

The invention provides a part head cold heading edge cutting processing mold, which comprises an upper mold (1) and a bottom mold, wherein the upper mold (1) vertically moves relative to the bottom mold through a driver, and comprises a punching mold (11), an upper edge cutting mold (12) and a locking cover (13), the upper edge cutting mold (12) is embedded in a hole cavity of the locking cover (13), the locking cover (13) is detachably fixed on the bottom end of the punching mold (11), a passage (14) is arranged in the punching mold (11), a lower bottom mold concave cavity (21) is arranged in the bottom mold, a through rod (22) is vertically arranged in the bottom concave cavity (21), the bottom mold arranged outside the bottom mold concave cavity (21) is provided with a lower edge cutting mold (4), the upper edge cutting mold (12) and the lower edge cutting mold (4) are in vertically aligned arrangement, the upper edge cutting mold (12) cuts the periphery of the head of a part (3) from ...

Part neck cold heading pattern cutting punching mold

The invention provides a part neck cold heading pattern cutting punching mold, which comprises an upper mold (1) and a lower mold, wherein the upper mold (1) can vertically move relative to the lower mold, and comprises an upper mold case (11) and a punching block (12), a lower mold concave cavity (21) capable of containing parts processed is arranged in the lower mold, a through rod (22) is vertically arranged in the lower mold concave cavity (21), penetrates through the through hole of the lower mold in a way capable of vertically sliding and extends out of the bottom of the lower mold, a neck edge cutting mold (4) is arranged on the lower mold arranged outside the lower mold concave cavity (21), and when a processed part (3) is put into the lower mold concave cavity (21), the upper mold (1) downwards moves through being driven by a driving device and extrudes the top of the processed part (3), so that the processed part (3) downwards moves to enter the lower mold concave cavity (21), ...

一种物料就地分选的方法

... 本发明公开了一种物料就地分选的方法和装置。尤其适用于松散的烟草制品的分选。在一个能够横向送风和垂直向上送风的箱体内进行。在进料口的下方向箱体提供横向进风和垂直进风，物料进入箱体后自由落下时，横向风对物料飘选，垂直风对物料浮选，重的物体通过进风口落下，轻的物体落入箱体内由输送机构送出。 ...