CN117563916B - High-performance optical polyester film on-line coating method and coating device - Google Patents
High-performance optical polyester film on-line coating method and coating device Download PDFInfo
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- CN117563916B CN117563916B CN202410051609.5A CN202410051609A CN117563916B CN 117563916 B CN117563916 B CN 117563916B CN 202410051609 A CN202410051609 A CN 202410051609A CN 117563916 B CN117563916 B CN 117563916B
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- 238000000034 method Methods 0.000 claims abstract description 32
- 238000002360 preparation method Methods 0.000 claims abstract description 31
- 230000008569 process Effects 0.000 claims abstract description 18
- 238000003860 storage Methods 0.000 claims abstract description 18
- 229920000728 polyester Polymers 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 21
- 238000003825 pressing Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 abstract description 4
- 230000008570 general process Effects 0.000 abstract description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0817—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line characterised by means for removing partially liquid or other fluent material from the roller, e.g. scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C13/00—Means for manipulating or holding work, e.g. for separate articles
- B05C13/02—Means for manipulating or holding work, e.g. for separate articles for particular articles
Landscapes
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention belongs to a general process for coating fluid on the surface and a device for coating fluid on the surface, and discloses a high-performance optical polyester film on-line coating method and a device for coating, wherein the on-line coating method comprises the following steps: after the polyester slabs are longitudinally stretched, carrying out on-line coating by a high-performance optical polyester film on-line coating device, and then transversely stretching; the online preparation of the coating liquid is carried out at the same time of online coating. The invention also discloses a device for on-line coating of the high-performance optical polyester film, which consists of a frame, a film leading-in guide roller, a film flattening roller, a coating liquid feeding mechanism, a coating liquid preparation mechanism, a coating head, a coating roller, a coating press roller and a coating film leading-out roller. The water-soluble coating liquid is prepared on line according to the amount of the water-soluble coating liquid; preparing while using; the storage condition of the coating liquid is hardly taken as the technical attack point, and the problem that the water-soluble coating liquid should be used in the effective time is solved by changing the technical process route.
Description
Technical Field
The invention relates to a general process for coating fluid on a surface and a device for coating the fluid on the surface, in particular to a high-performance optical polyester film on-line coating method and a device for coating.
Background
With the continuous improvement of the national living standard along with the economic development of China, the development of the polyester film industry faces more opportunities and challenges, and polyester film manufacturers need to perform technical improvement in the aspect of expanding the film functionality so as to meet the market demands. The online coating technology is a technology for adding an online coating process in the production process of the polyester film, coating chemical coating liquid on the surface of the film by using a coating machine and endowing the polyester film with a specific surface function, and can greatly expand the application field of the polyester film.
By using different coating liquids, such as polyester type, polyurethane type, acrylic acid, silicon solution, etc., on-line coating can enhance specific surface properties of the film, such as enhancing film printing properties, enhancing aluminum layer peeling force of the aluminized film, providing boiling resistance of the aluminized film, providing surface smoothness of the film, etc. When each coating liquid is used, the production process is required to be correspondingly adjusted so as to meet the technical requirements of curing time, temperature and the like of the coating liquid and ensure the production stability.
Unlike common protective films or adhesive tapes, the optical film must be uniform in thickness, and the surface requires no dust and few crystal points, which puts higher demands on the coating technology and requires that the prepared film thickness be uniform. Thus, precision coating processes are also gradually developed and are continuously perfected. Optical film coatings are traditionally prepared by vacuum evaporation, chemical deposition, plasma polymerization and other methods, which are difficult to realize mass production of roll-to-roll film substrates; in modern coating processes, common coating modes include dip coating, roll coating, slide extrusion coating, curtain coating and the like. The coating modes are applicable to materials with different properties and coating thicknesses, and have respective advantages and disadvantages.
The polyester film stretched in two directions in a plane is widely applicable to the field of photoelectric display due to excellent optical performance, dimensional stability and good processability. And the film is processed into various optical functional films through various reprocessing, and is used as a structural member of a display module or a manufacturing process protective film. A layer of water-based high polymer resin material is coated on the surface of the film in an online coating mode, a functional coating is formed after stretching and drying, and good riveting is formed with the subsequent offline coating, so that the interlayer adhesive force is improved, and the good adhesive force can be met no matter the film is subjected to heat treatment, UV treatment and electron beam treatment. Because of the chemical bond bonding between the layers, the adhesive force is excellent relative to corona treatment, and the adhesive has permanence. The light-increasing film and various composite films are mainly applied to the field of photoelectric display.
Wu Jianping the importance of the timeliness of the coating liquid is mentioned in the paper "analysis of factors affecting the production stability of on-line coated films in the production of polyester films" published in Plastic packaging, 2009, volume 19, 4: because the online coating adopts water-soluble coating liquid, the coating liquid can be changed after being prepared for a long time, the coating liquid should be used within the effective time of the coating liquid, and meanwhile, in order to ensure the quality of the coating liquid, the storage of the coating liquid needs to be carried out according to the storage conditions specified by the product, and unnecessary loss can be caused if the storage is improper. The existing technical measures are mainly focused on how to store, thus increasing the storage cost, improving the adjustment and thinking methods in the storage technology, and increasing the process cost and the process technical difficulty of the on-line coating of the high-performance optical polyester film.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a high-performance optical polyester film online coating method, wherein the water-soluble coating liquid is prepared online according to the amount of the water-soluble coating liquid; coating immediately after preparation, and preparing while using; the storage condition of the coating liquid is hardly taken as the technical attack point, and the problem that the water-soluble coating liquid should be used in the effective time is solved by changing the technical process route.
In order to achieve the above purpose, the technical scheme of the invention is to design a high-performance optical polyester film on-line coating method, wherein after a polyester thick sheet is longitudinally stretched, the polyester thick sheet is transversely stretched after being coated on line by a high-performance optical polyester film on-line coating device; carrying out online preparation of coating liquid while online coating; a small amount of coating liquid temporary storage procedure is arranged between the coating procedure and the preparation procedure; pre-preparing a small amount of coating liquid before on-line coating, temporarily storing the prepared small amount of coating liquid, then on-line coating, and simultaneously preparing the coating liquid on line. The water-soluble coating liquid is prepared on line according to the amount of the water-soluble coating liquid; coating immediately after preparation, and preparing while using; the storage condition of the coating liquid is hardly taken as the technical attack point, and the problem that the water-soluble coating liquid should be used in the effective time is solved by changing the technical process route. The storage difficulty is reduced, and the process cost and the process technology difficulty are reduced. In order to better adapt to production, a small amount of coating liquid temporary storage procedure can be set, a part of small amount or trace amount of coating liquid is prepared in advance, then online coating is performed immediately, online preparation is performed while online coating, the prepared coating liquid is guaranteed to be coated on a film quickly, the storage difficulty is solved, and the process cost is reduced.
Further, in the in-line coating step, the excess coating liquid on the coating roll is removed by means of a vibration coater. In the production of the coating film, the coating knife is used for removing redundant coating liquid on the coating roller, so that the effect on the uniformity of coating of the coating liquid is obvious, and the installation of the coating knife is good and bad, so that the coating quality and the production stability are directly affected; the scheme adopts reverse thinking, the coating knife is set to vibrate, and continuously micro-vibrate to improve the coating uniformity of the coating liquid.
The invention also provides a technical scheme that the coating device involved in the high-performance optical polyester film online coating method consists of a frame, a film leading-in guide roller, a film flattening roller, a coating liquid feeding mechanism, a coating liquid preparation mechanism, a coating head, a coating roller, a coating press roller and a coating film leading-out roller;
the film leading-in guide roller, the film flattening roller and the coating film leading-out roller are all rotatably arranged on the frame; the coating press roller is rotatably arranged on two sliding blocks, and the sliding blocks are arranged on the frame in a sliding way; the coating liquid preparation mechanism, the coating liquid feeding mechanism and the coating head are connected in sequence; the film sequentially passes through a film guiding roller and a film flattening roller, then reaches between a coating roller and a coating pressing roller, and finally passes through a coating film guiding roller for guiding out;
the coating head is arranged opposite to the coating roller; the coating head comprises a coating knife rest fixedly connected to the frame, and a coating knife is arranged on the coating knife rest; the coating liquid preparation mechanism comprises a stirring tank, a charging tank arranged above the stirring tank and a standing bottle connected with the stirring tank; the coating liquid feeding mechanism comprises a liquid feeding pump connected with the standing bottle, the coating head further comprises a coating groove arranged below the coating roller, a discharge hole of the liquid feeding pump is opposite to the coating groove, and the coating knife is arranged above the coating roller. After the polyester thick sheet is longitudinally stretched, the polyester thick sheet enters between a compression roller and a coating roller through a guide roller and a flattening roller of an online coating machine, the compression roller presses a film on the coating roller, so that coating liquid on the coating roller is transferred onto the film, and after coating is finished, the film is led out by a coating film leading-out roller and enters transverse stretching equipment; the preparation process of the water-soluble coating liquid generally comprises stirring, water bath swelling, stirring, hydrolytic condensation and the like, wherein different raw materials are gradually added in the process, and if standing is needed, a standing bottle is arranged in a matched manner; the coating liquid is prepared by the coating liquid preparation mechanism, then the coating liquid is supplied to the coating head through the coating liquid feeding mechanism, the supplied coating liquid brings the coating liquid to the film above the coating roller along with the rotation of the coating roller, the targeted coating knife ensures the coating uniformity of the coating liquid, and the online coating of the optical polyester film is realized by matching the coating press roller which is rotationally arranged above the film.
The further technical proposal is that a vibrating motor is fixedly arranged on a coating knife rest, and the coating knife is movably connected on the coating knife rest; two ends of the coating knife are provided with knife shafts, and knife shaft holes with the size larger than that of the knife shafts are arranged on the coating knife rest;
the coating roller is rotatably arranged on the frame; or the coating roller is rotatably arranged on a pair of sliding plates which are arranged on the frame in a sliding way. The size of the cutter shaft hole is slightly larger than that of the cutter shaft so as to allow the coating knife to have a small amount of freedom, and the coating knife can be kept to vibrate continuously and slightly by being matched with the vibration motor, so that the problem of uneven coating of the coating liquid caused by insufficient precision of the coating knife can be avoided.
The further technical scheme is that a sliding groove for vertically sliding the sliding block is arranged on the frame, a driving block for keeping the distance between the coating press roller and the coating roller is also arranged on the sliding groove in a sliding manner, the driving block is positioned below the sliding block, a connecting rod is hinged on the driving block, and the other end of the connecting rod is hinged on the sliding plate; the rack is provided with arc grooves for sliding of the sliding plate, and the arc grooves are symmetrically arranged by taking a weight line as a symmetry axis. In the production of online coating films, a coating press roll presses a film on the coating roll, so that coating liquid is transferred onto a polyester film better, when the coating press roll is pressed down too fast in the pressing down process, film breakage in the production process is easy to occur, if the pressure of the coating roll is adjusted to be too large or too small, the coating quality can be influenced, and the pressing down pressure, the pressing down position and the speed of the coating roll are adjusted to be at proper positions in the production in the prior art. After the scheme is set, the coating press roller still keeps higher speed when being pressed down, and can be driven to rotate, so that the problem that the film is easy to break due to too large impact when the coating press roller presses a film is avoided; in addition, the minimum distance between the coating press roller and the coating roller is kept when the coating press roller is pressed down, so that membrane breakage caused by too small distance between the coating press roller and the coating roller can be avoided, and the coating roller moves downwards by a small distance when the coating press roller is pressed down to the extreme position of the lowest end (specifically, the sliding plates at the two ends of the coating roller slide so that the coating roller reaches the other position from one position, namely, the coating roller reaches the other end from one end of the arc-shaped groove); so that the coating press roller can avoid film breakage when rapidly pressing down (keeping high work efficiency).
The invention has the advantages and beneficial effects that: the water-soluble coating liquid is prepared on line according to the amount of the water-soluble coating liquid; coating immediately after preparation, and preparing while using; the storage condition of the coating liquid is hardly taken as the technical attack point, and the problem that the water-soluble coating liquid should be used in the effective time is solved by changing the technical process route. The storage difficulty is reduced, and the process cost and the process technology difficulty are reduced.
In order to better adapt to production, a small amount of coating liquid temporary storage procedure can be set, a part of small amount or trace amount of coating liquid is prepared in advance, then online coating is performed immediately, online preparation is performed while online coating, the prepared coating liquid is guaranteed to be coated on a film quickly, the storage difficulty is solved, and the process cost is reduced.
In the production of the coating film, the coating knife is used for removing redundant coating liquid on the coating roller, so that the effect on the uniformity of coating of the coating liquid is obvious, and the installation of the coating knife is good and bad, so that the coating quality and the production stability are directly affected; the scheme adopts reverse thinking, the coating knife is set to vibrate, and continuously micro-vibrate to improve the coating uniformity of the coating liquid.
The size of the cutter shaft hole is slightly larger than that of the cutter shaft so as to allow the coating knife to have a small amount of freedom, and the coating knife can be kept to vibrate continuously and slightly by being matched with the vibration motor, so that the problem of uneven coating of the coating liquid caused by insufficient precision of the coating knife can be avoided.
The high speed is still kept when the coating press roller is pressed down, and meanwhile, the coating press roller can be driven to rotate, so that the problem that the film is easy to break due to too large impact when the coating press roller is pressed to the film is avoided; in addition, the minimum distance between the coating press roller and the coating roller is kept when the coating press roller is pressed down, so that membrane breakage caused by too small distance between the coating press roller and the coating roller can be avoided, and the coating roller moves downwards by a small distance when the coating press roller is pressed down to the extreme position of the lowest end (specifically, the sliding plates at the two ends of the coating roller slide so that the coating roller reaches the other position from one position, namely, the coating roller reaches the other end from one end of the arc-shaped groove); so that the coating press roller can avoid film breakage when rapidly pressing down (keeping high work efficiency).
Drawings
FIG. 1 is a schematic view of an embodiment of an apparatus for in-line coating of a high performance optical polyester film according to the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is an enlarged schematic view of the right end portion of FIG. 2;
FIG. 4 is a schematic view of FIG. 3 with an outside portion of the frame removed;
FIG. 5 is an exploded view of the coating blade holder and coating blade of FIG. 4;
FIG. 6 is a schematic view of FIG. 4 with all of the racks removed;
FIG. 7 is a schematic view of the alternate operational state of FIG. 3;
FIG. 8 is a comparative schematic diagram of FIG. 7 showing only the applicator roll at two different stations;
FIG. 9 is a schematic diagram of a second embodiment of the present invention;
FIG. 10 is a schematic view of the removal applicator roll of FIG. 9 in a second station;
FIG. 11 is a schematic view of the applicator roll of FIG. 9 in operation at a second station, shown in phantom in FIG. 9;
FIG. 12 is an enlarged schematic view of the spring, cam mechanism and applicator blade portion of FIG. 9;
FIG. 13 is an enlarged schematic view of the coating blade and the coating blade holder portion of FIG. 9;
FIG. 14 is an enlarged schematic view of the cam mechanism of FIG. 12;
FIG. 15 is a top view of FIG. 14;
fig. 16 is a schematic view of the pod cartridge of fig. 12 after showing the surface spiral grooves.
In the figure: 1. a frame; 2. a film introducing guide roller; 3. a film flattening roller; 4. a coating roller; 5. coating a press roller; 6. a coating film delivery roller; 7. a slide block; 8. a coating knife; 9. a stirring tank; 10. a charging tank; 11. standing the bottle; 12. a liquid feed pump; 13. a coating bath; 14. a vibration motor; 15. a slide plate; 16. a chute; 17. a driving block; 18. a connecting rod; 19. an arc-shaped groove; 20. a cutter shaft; 21. a cutter shaft hole; 22. a second link; 23. a transmission rod; 24. a rotating column; 25. a grooved drum; 26. a cam; 27. a push rod; 28. a chassis; 29. an abutment wheel; 30. an air bag; 31. a connecting block; 32. a second air bag; 33. a top block; 34. a spring; 35. a baffle; 36. and a through hole.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
Example 1
As shown in fig. 1 to 8 (for convenience of illustration, fig. 1 does not show a right end part frame, a coating groove; fig. 2 does not show a coating knife rest, a coating groove but additionally shows a right end part frame; fig. 3 does not show a coating film leading-out roller, a coating groove; fig. 6 additionally shows a coating liquid preparation mechanism and a coating liquid feeding mechanism; fig. 7 does not show a coating groove), the invention is an on-line coating method of a high-performance optical polyester film, and after a polyester thick sheet is longitudinally stretched, the polyester thick sheet is transversely stretched after being coated on line by a device for on-line coating of the high-performance optical polyester film; the online preparation of the coating liquid is carried out at the same time of online coating. A small amount of coating liquid temporary storage procedure is arranged between the coating procedure and the preparation procedure; pre-preparing a small amount of coating liquid before on-line coating, temporarily storing the prepared small amount of coating liquid, then on-line coating, and simultaneously preparing the coating liquid on line. In the in-line coating step, the excess coating liquid on the coating roller 4 is removed by means of the vibration coating blade 8.
The coating device for the high-performance optical polyester film in-line coating method comprises a frame 1, a film leading-in guide roller 2, a film flattening roller 3, a coating liquid feeding mechanism, a coating liquid preparation mechanism, a coating head, a coating roller 4, a coating press roller 5 and a coating film leading-out roller 6; the film leading-in guide roller 2, the film flattening roller 3 and the coating film leading-out roller 6 are all rotatably arranged on the frame 1; the coating press roller 5 is rotatably arranged on two sliding blocks 7, and the sliding blocks 7 are slidably arranged on the frame 1; the coating liquid preparation mechanism, the coating liquid feeding mechanism and the coating head are connected in sequence; the film sequentially passes through a film leading-in guide roller 2 and a film flattening roller 3, then reaches between a coating roller 4 and a coating press roller 5, and then passes through a coating film leading-out roller 6 to be led out and then to a transverse drawing machine; the coating head is arranged opposite to the coating roller 4; the coating head comprises a coating knife rest fixedly connected to the frame 1, and a coating knife 8 is arranged on the coating knife rest; the coating film guiding-out roller 6 is positioned at one side of the coating knife rest; the coating liquid preparation mechanism comprises a stirring tank 9, a feeding tank 10 arranged above the stirring tank 9 and a standing bottle 11 connected with the stirring tank 9; the coating liquid feeding mechanism comprises a liquid feeding pump 12 connected with the standing bottle 11, the coating head further comprises a coating groove 13 arranged below the coating roller 4, the coating groove 13 is connected to the frame 1 in a sliding mode, a discharge hole of the liquid feeding pump 12 is opposite to the coating groove 13, and the coating knife 8 is arranged above the coating roller 4. A vibration motor 14 is fixedly arranged on the coating knife rest, and the coating knife 8 is movably connected to the coating knife rest; the two ends of the coating knife 8 are provided with knife shafts 20, and knife shaft holes 21 with the size larger than that of the knife shafts 20 are arranged on the coating knife rest; the coating roller 4 is rotatably arranged on the frame 1; or the coating roller 4 is rotatably provided on a pair of slide plates 15, and the slide plates 15 are slidably provided on the frame 1. The frame 1 is provided with a chute 16 for the vertical sliding of the sliding block 7, the chute 16 is also provided with a driving block 17 for keeping the interval between the coating press roller 5 and the coating roller 4 in a sliding way, the driving block 17 is positioned below the sliding block 7, the driving block 17 is hinged with a connecting rod 18, and the other end of the connecting rod 18 is hinged on the sliding plate 15; the frame 1 is provided with an arc-shaped groove 19 for sliding the sliding plate 15, and the arc-shaped groove 19 is symmetrically arranged by taking a weight line as a symmetry axis. The film flattening roller is arranged below the bottom plate of the frame, so that ash falling and the like in the flattening process can be avoided; a reducing motor for driving the coating roller to rotate is fixedly arranged on the sliding plate; the slide block is fixedly provided with a second gear motor for driving the coating press roller to rotate. The frame is provided with an arc-shaped groove (the inner side surface and the outer side surface of the frame are respectively provided with the groove and are positioned at the two ends of the coating groove) which is similar to the arc-shaped groove and is used for the coating groove to follow the sliding plate 15 of the coating roller, the outer wall of the coating groove is connected with the sliding plate 15 through a second connecting rod 22, one end of the second connecting rod 22 is hinged with the coating groove, and the other end is hinged with the sliding plate 15; so that when the slide plate 15 is driven by the driving block 17 to slide in the arc-shaped groove 19, the coating groove also slides on the frame along with the slide plate 15, so that the coating groove always keeps a required distance from the coating roller; in order to match the movement of the coating tank, the discharge pipe of the liquid feed pump is a hose.
A part of small or trace coating liquid is prepared (after being added by a material adding tank 10, the coating liquid is stirred by a stirring tank 9 and is kept still by a standing bottle 11) and is conveyed to a coating groove 13 by a liquid feed pump 12, a film sequentially passes through a film leading-in guide roller 2, a film flattening roller 3, reaches between a coating roller 4 and a coating press roller 5, and is led out by a coating film leading-out roller 6 and then is conveyed to a transverse drawing machine, the film reaches between the coating roller 4 and the coating press roller 5 for immediate online coating, and online preparation is carried out while online coating (continuously carrying out the following processes: after being added by the material adding tank 10, the stirring tank 9 is stirred, the coating liquid is continuously conveyed to the coating groove 13 by the liquid feed pump 12 after being kept still by the standing bottle 11). The vibration motor acts while coating on line, so that the cutter shaft moves within the range of the hole of the cutter shaft hole, and continuous micro vibration of the coating cutter is realized; when the coating press roller 5 is rapidly pressed down during online coating, the sliding block 7 drives the driving block 17 to slide downwards along the sliding groove 16, and the connecting rod 18 is hinged on the driving block 17, so that the sliding plate 15 is driven to slide in the arc-shaped groove 19 (until the driving block 17 reaches the bottom end of the sliding groove 16 or the sliding plate 15 reaches the right end of the arc-shaped groove 19, specifically determined according to the designed connecting rod length, the sliding groove length and the size of the arc-shaped groove 19, the sliding plate 15 cannot slide continuously after the driving block 17 reaches the bottom end of the sliding groove 16 in the drawing, and the sliding plate 15 cannot slide continuously after the sliding plate 15 reaches the right end of the arc-shaped groove 19 after the three sizes are changed, so that adjustment can be made in the design according to actual working conditions).
Example two
The difference from the first embodiment is that, as shown in fig. 9 to 16 (for convenience of illustration, fig. 9 shows schematic views of two different positions of the coating roller; the second position is shown by a broken line, the coating groove below the coating roller is also shown by a broken line; fig. 10 is a schematic view of fig. 9 with broken lines removed; fig. 15 with the chassis removed), in this embodiment, the cutter shaft hole 21 is no longer a circular hole larger in size than the cutter shaft 20 but a slotted hole larger in size than the cutter shaft, and the width of the slotted hole (the width of the slotted hole is the same as the diameter of the end semicircle of the slotted hole) is the same as the diameter of the cutter shaft 20, and the slotted hole is vertically arranged (so that the coating cutter is vibrated up and down only after the vibration motor is started); the coating knife 8 is fixedly connected with a transmission rod 23 below, an extension rod is fixedly connected to the transmission rod 23, the end part of the extension rod is rotationally connected with a rotary column 24, the rotary column 24 is matched with a spiral groove on a grooved drum 25, the rotary column 24 is positioned in the spiral groove on the grooved drum 25, when a vibration motor 14 vibrates, the transmission rod 23 moves up and down along with the coating knife 8, the cooperation of the rotary column 24 of the transmission rod and the grooved drum 25 realizes that the grooved drum 25 is driven to rotate when the transmission rod 23 moves up and down, a rotating shaft of the grooved drum is fixedly connected with a cam shaft of a cam 26 of a cam mechanism to realize that the cam 26 rotates when the grooved drum 25 rotates, so that reciprocating expansion and contraction of a push rod 27 on the cam mechanism are realized, a chassis 28 of the cam mechanism is fixedly connected to the side surface of a frame, the cam 26 is rotationally arranged on the chassis 28, a push rod 27 is slidingly arranged on the chassis, one end of the push rod close to the cam is rotationally provided with a supporting wheel 29, and the supporting wheel 29 is supported on the cam 26; the end fixing that the ejector pin kept away from the cam sets up gasbag 30, the camshaft of cam 26 is vertical to be set up, fixed surface is connected with connecting block 31 on the ejector pin 27, connecting block 31 is close to cam 26 and sets up, fixed surface is connected with second gasbag 32 on the connecting block, second gasbag 32 is cuboid shell form, the hypomere outer wall fixedly connected with kicking block 33 of coating knife rest, the tip fixedly connected with spring 34 that the kicking block 33 kept away from the coating knife rest, the middle section fixedly connected with baffle 35 of spring 34, the height of baffle 35 upper end surpasses the height at second gasbag 32 place, be equipped with horizontal through-hole 36 on the baffle 35, the through-hole 36 highly match with gasbag 30 for spring 34 still allows gasbag 30 to pass the baffle when being pressed by second connecting rod 22 and can intermittent extrusion coating roller 4's surface, avoid the jam of coating roller 4 mesh, realize on-line unblocking.
When the vibration motor is started and the coating press roller is not pressed down, the second air bag 32 is in a state of full air straightening, at this time, the vibration motor is started to drive the coating knife to vibrate up and down, the coating knife 8 vibrates up and down, so that the transmission rod 23 moves up and down, and the groove drum 25 is driven to rotate, thus driving the cam 26 to rotate, and the cam mechanism acts to realize reciprocating expansion of the ejector rod 27, so that the second air bag 32 in a straightened state reciprocally extrudes meshes of the coating roller 4, and the elasticity of the second air bag 32 hardly influences the rotation of the coating roller (after all, the coating roller is driven by the speed reducing motor), and thus the intermittent extrusion of the surface of the coating roller 4 can be realized, the blocking of meshes of the coating roller 4 is avoided, and the on-line blocking is realized. When the coating roller is pressed down to drive the coating roller to slide, the second connecting rod 22 compresses the spring in the process of transversely moving, so the spring drives the baffle 35 to transversely move, the second air bag 32 is extruded to avoid the second air bag 32 contacting the coating roller 4, the through holes 36 on the baffle 35 run ejector rods to pass through, the air bag 30 passes through the baffle to intermittently extrude the surface of the coating roller 4, the blockage of meshes of the coating roller 4 is avoided, and the on-line blocking is realized.
The coating process needs to adopt coating rollers with different surface treatments, and the meshes of the coating rollers are blocked after a period of coating production, so that the coating quality is reduced, and the surface of the coating rollers needs to be treated after the coating rollers are used for a period of time. So in order to ensure the quality of the coating, it is necessary to avoid clogging of the coating roll mesh on the one hand and to improve the uniformity of the coating liquid on the other hand.
The arrangement of the embodiment realizes that the vibration motor vibrates and drives the cam mechanism to intermittently extend out of the elastic/flexible piece to realize on-line blocking of meshes on the surface of the on-line coating roller, and in addition, the continuous micro-vibration of the coating knife improves the coating uniformity. Together, the quality of the coating is ensured.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (4)
1. The device for on-line coating the high-performance optical polyester film is characterized by comprising a frame, a film leading-in guide roller, a film flattening roller, a coating liquid feeding mechanism, a coating liquid preparation mechanism, a coating head, a coating roller, a coating press roller and a coating film leading-out roller;
the film leading-in guide roller, the film flattening roller and the coating film leading-out roller are all rotatably arranged on the frame; the coating press roller is rotatably arranged on two sliding blocks, and the sliding blocks are arranged on the frame in a sliding way; the coating liquid preparation mechanism, the coating liquid feeding mechanism and the coating head are connected in sequence; the film sequentially passes through a film guiding roller and a film flattening roller, then reaches between a coating roller and a coating pressing roller, and finally passes through a coating film guiding roller for guiding out;
the coating head is arranged opposite to the coating roller; the coating head comprises a coating knife rest fixedly connected to the frame, and a coating knife is arranged on the coating knife rest; the coating liquid preparation mechanism comprises a stirring tank, a charging tank arranged above the stirring tank and a standing bottle connected with the stirring tank; the coating liquid feeding mechanism comprises a liquid feeding pump connected with the standing bottle, the coating head further comprises a coating groove arranged below the coating roller, a discharge hole of the liquid feeding pump is opposite to the coating groove, and the coating knife is arranged above the coating roller;
the machine frame is provided with a sliding groove for the sliding block to vertically slide, a driving block for keeping the interval between the coating press roller and the coating roller is also arranged on the sliding groove in a sliding manner, the driving block is positioned below the sliding block, a connecting rod is hinged on the driving block, and the other end of the connecting rod is hinged on the sliding plate; the rack is provided with arc grooves for sliding of the sliding plate, and the arc grooves are symmetrically arranged by taking a weight line as a symmetry axis;
the film flattening roller is arranged below the bottom plate of the frame so as to avoid ash falling in the flattening process; a reducing motor for driving the coating roller to rotate is fixedly arranged on the sliding plate; the slide block is fixedly provided with a second gear motor for driving the coating press roller to rotate; the coating machine comprises a rack, a first connecting rod, a second connecting rod, a driving block, a sliding plate, a coating groove, a coating roller, a coating groove sliding plate, a driving block and a driving block, wherein the rack is provided with an arc-shaped groove for the coating groove to slide along with the sliding plate of the coating roller, the inner side surface and the outer side surface of the rack are respectively provided with the groove and are positioned at two ends of the coating groove, the outer wall of the coating groove is connected with the sliding plate through the second connecting rod, one end of the second connecting rod is hinged with the coating groove, and the other end of the second connecting rod is hinged with the sliding plate so as to realize that the coating groove also slides along with the sliding plate on the rack when the sliding plate is driven by the driving block to slide in the arc-shaped groove, so that the coating groove always keeps a required distance with the coating roller; the discharge pipe of the liquid feed pump is a hose to match the movement of the coating tank.
2. The device for on-line coating the high-performance optical polyester film is characterized by comprising a frame, a film leading-in guide roller, a film flattening roller, a coating liquid feeding mechanism, a coating liquid preparation mechanism, a coating head, a coating roller, a coating press roller and a coating film leading-out roller;
the film leading-in guide roller, the film flattening roller and the coating film leading-out roller are all rotatably arranged on the frame; the coating press roller is rotatably arranged on two sliding blocks, and the sliding blocks are arranged on the frame in a sliding way; the coating liquid preparation mechanism, the coating liquid feeding mechanism and the coating head are connected in sequence; the film sequentially passes through a film guiding roller and a film flattening roller, then reaches between a coating roller and a coating pressing roller, and finally passes through a coating film guiding roller for guiding out;
the coating head is arranged opposite to the coating roller; the coating head comprises a coating knife rest fixedly connected to the frame, and a coating knife is arranged on the coating knife rest; the coating liquid preparation mechanism comprises a stirring tank, a charging tank arranged above the stirring tank and a standing bottle connected with the stirring tank; the coating liquid feeding mechanism comprises a liquid feeding pump connected with the standing bottle, the coating head further comprises a coating groove arranged below the coating roller, a discharge hole of the liquid feeding pump is opposite to the coating groove, and the coating knife is arranged above the coating roller;
the coating knife rest is fixedly provided with a vibrating motor, and the coating knife is movably connected to the coating knife rest; two ends of the coating knife are provided with knife shafts, and knife shaft holes with the size larger than that of the knife shafts are arranged on the coating knife rest;
the coating roller is rotatably arranged on the frame; or the coating roller is rotatably arranged on a pair of sliding plates which are arranged on the frame in a sliding way.
3. The in-line coating method of the in-line coating apparatus for high-performance optical polyester film according to claim 1, wherein after the polyester thick sheet is subjected to the longitudinal stretching, the in-line coating by the in-line coating apparatus for high-performance optical polyester film is followed by the transverse stretching; carrying out online preparation of coating liquid while online coating; a small amount of coating liquid temporary storage procedure is arranged between the coating procedure and the preparation procedure; pre-preparing a small amount of coating liquid before online coating, temporarily storing the prepared small amount of coating liquid, then carrying out online coating, and simultaneously carrying out online preparation of the coating liquid;
after the material adding tank feeds materials, stirring is carried out by a stirring tank, a part of small or trace coating liquid is prepared in advance after the material adding tank stands by a standing bottle, the coating liquid is conveyed to a coating tank by a liquid feed pump, a film sequentially passes through a film leading-in guide roller, a film flattening roller, then reaches between a coating roller and a coating press roller, is led out by a coating film leading-out roller and then is sent to a transverse drawing machine, the film reaches between the coating roller and the coating press roller for online coating immediately, and online preparation is carried out while online coating: stirring through a stirring tank after feeding through a feeding tank, and continuously conveying the coating liquid to a coating tank through a liquid feed pump after standing through a standing bottle;
when in online coating, the coating press roller is rapidly pressed down, the sliding block drives the driving block to slide downwards along the sliding groove, and the connecting rod is hinged on the driving block, so that the sliding plate is driven to slide in the arc-shaped groove.
4. The method of on-line coating a high-performance optical polyester film according to claim 3, wherein in the on-line coating step, an excess coating liquid on the coating roll is removed by means of a vibration coater.
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