A high-speed ultra-wide reverse coating device

Abstract

This invention discloses a high-speed, ultra-wide reverse coating apparatus, comprising a frame with a doctor blade frame on one side; an anilox roller assembly, a pressure roller moving device, a gap adjustment device, a glue receiving tray assembly, and a guide roller assembly are mounted on the frame; the pressure roller moving device is equipped with a guide roller assembly A, a traction roller assembly, a traction pressure roller assembly, a traction gap adjustment device, and an adjusting roller assembly, and is located above the anilox roller assembly; the gap adjustment device controls the gap between the traction roller assembly and the anilox roller assembly; the adjusting roller assembly is located on one side of the anilox roller assembly and adjusts the angle at which the film enters the anilox roller by moving it up and down; a closed doctor blade assembly is mounted on the doctor blade frame, which can rotate to fit onto the anilox roller assembly, transferring the glue onto the anilox roller assembly, and then transferring it onto the film through the anilox roller assembly; the rotation direction of the anilox roller is opposite to the forward direction of the film, thereby achieving reverse coating.

Description

Technical Field

[0001] This invention belongs to the technical field of precision coating equipment and relates to a high-speed ultra-wide reverse coating device. Background Technology

[0002] The existing low-end optical film industry, including release films, is facing increasingly fierce competition. With stricter national environmental regulations, customers are increasingly seeking high-precision, wide-width (roller width greater than 2200mm), and high-speed coating equipment to improve production efficiency, reduce energy and labor costs, and enhance market competitiveness. Customers are demanding higher production speeds and wider film widths from precision coating machines. By increasing speed and width, the production efficiency of a high-speed, ultra-wide release film precision coating machine can be four times higher or even more than before, while reducing personnel, energy consumption, and the need for cleanroom space, significantly lowering production costs. While many coating methods and equipment are used domestically and internationally, each has drawbacks such as small width, low speed, and noticeably insufficient coating effect, making it difficult to meet customers' demands for high-volume, high-speed production. Therefore, how to overcome the shortcomings of various coating methods and how to develop coating technology are crucial directions for research. Summary of the Invention

[0003] The purpose of this invention is to provide a high-speed, ultra-wide reverse coating device that solves the problems of small width and low speed of existing coating units.

[0004] The technical solution adopted in this invention is a high-speed ultra-wide reverse coating device, specifically including a frame, a pressure roller moving device installed on the frame, and an anilox roller device installed at the bottom of the frame at the pressure roller moving device.

[0005] The pressure roller moving device is equipped with a traction roller device, which is located above the anilox roller device. The traction roller device is connected to an adjusting roller device, which is located on one side of the anilox roller device. It also includes a gap adjustment device mounted on the frame, with the adjusting roller device mounted on the gap adjustment device. The pressure roller moving device is also equipped with a traction pressure roller device above the traction roller device, and a traction gap adjustment device is installed on one side of the traction pressure roller device. The pressure roller moving device is also equipped with a guide roller device A, which is located on one side of the frame. The guide roller device is connected to the traction gap adjustment device through the guide roller device A.

[0006] The frame is located at the bottom of the anilox roller device and is also equipped with a glue receiving tray device; a scraper frame is located on the side of the frame near the anilox roller device, and a closed scraper device is installed on the scraper frame, which is connected to the anilox roller device.

[0007] The invention is further characterized by:

[0008] The anilox roller assembly includes an anilox roller. The frame is equipped with bearing housings G and M that mate with the anilox roller. The anilox roller is connected to bearing housings G and M respectively via bearings. One section of the anilox roller is connected to a motor via a coupling. The enclosed doctor blade assembly rotates in harmony with the anilox roller. The coupling is a long-length adjustable stroke universal joint coupling. The motor bracket is mounted on the ground away from the frame, which can effectively avoid the impact of motor vibration on coating. It can also isolate the motor outside the coating room through a cleanroom partition, reducing the risk of explosion caused by sparks generated by the motor.

[0009] The pressure roller moving device includes two parallel cylinders. One end of each cylinder is fixed to a wall panel on one side of the frame, and the output end of the cylinder is connected to a moving plate. The guide roller device A, traction roller device, traction pressure roller device, traction gap adjustment device, and adjustment roller device are all located on the moving plate. When the pressure roller moving device moves up and down through the cylinders, the total length change of the material film in the high-speed ultra-wide reverse coating unit is less than 25mm, ensuring that the tension fluctuation of the high-speed ultra-wide reverse coating unit is less than ±3N.

[0010] The movable plate has linear slide rails perpendicular to it at both ends. The linear slide rails are mounted on the frame. The two ends of the movable plate are movably connected to the linear slide rails via sliders.

[0011] The scraper frame includes a base plate, on which two parallel scraper wall plates are provided. The scraper wall plates are perpendicular to the base plate. One side of the scraper wall plate is connected to the scraper movement mechanism through a connecting shaft. The enclosed scraper device is set on one side of the scraper wall plate.

[0012] The bottom of the base plate is also equipped with an air cushion mechanism, which is an inflatable air cushion.

[0013] The enclosed doctor blade device includes an ink chamber, with a doctor blade located at one end of the ink chamber near the anilox roller. The doctor blade is fixed to the ink chamber by a pressure plate. The anilox roller transfers the adhesive from the ink chamber to the material film through the enclosed doctor blade device. The straightness of the doctor blade is adjusted by adjusting the tightness of the doctor blade pressure plate screw, which improves the sealing performance of the enclosed doctor blade device and ensures that the adhesive in the ink chamber does not leak out when the anilox roller device rotates at high speed. The doctor blade frame is also equipped with a doctor blade pipeline device that communicates with the ink chamber, and an adhesive outlet is opened on the side of the ink chamber near the anilox roller.

[0014] The ink chamber is also equipped with a baffle plate, which is located at the glue inlet and glue outlet of the ink chamber. The baffle plate has a buffering effect on the glue entering and leaving the ink chamber, reducing the impact of glue and improving the stability of coating.

[0015] The gap adjustment device includes a linear slide rail fixed horizontally on the frame, a lead screw arranged parallel to one side of the linear slide rail, an inclined block adapted to the linear slide rail fitted on the lead screw, the inclined block being located directly below the pressure roller moving device, the lead screw shaft being connected to a reducer, and a handwheel being provided at one end of the reducer, which can control the gap between the traction roller and the anilox roller to be adjusted at the micron level.

[0016] The beneficial effects of this invention are:

[0017] The high-speed ultra-wide reverse coating apparatus of this invention transfers adhesive from the enclosed doctor blade device onto the film via an anilox roller device. The feed angle of the film on the anilox roller is adjusted by an adjusting roller device, and the discharge angle is adjusted by a gap adjusting device to regulate the gap between the traction roller and the anilox roller. Adjusting the wrap angle between the film and the anilox roller improves the uniformity of adhesive coating and enhances the coating effect. The tension fluctuations of the film before coating are isolated by the combined pressure of the traction roller device and the traction pressure roller device, preventing coating defects caused by tension fluctuations. Furthermore, the length of the film from the traction roller device to the anilox roller can be controlled within 570mm, achieving low film tension during coating and effectively ensuring coating performance at high speeds and ultra-wide widths. The enclosed doctor blade device solves the problems of existing enclosed doctor blades not easily forming a closed ink cavity with the anilox roller, leading to ink leakage; and the doctor blades being prone to wear and requiring time and effort to replace. A closed-loop doctor blade device includes an ink chamber. An upper doctor blade is pressed firmly against the upper part of the ink chamber by an upper pressure plate, and a lower doctor blade is pressed firmly against the lower part of the ink chamber by a lower pressure plate. The upper and lower doctor blades, the screen roller, and the ink chamber together form a closed ink chamber, achieving a leak-proof seal. The location of the glue inlet and outlet was developed by simulating the flow direction of the glue in the ink chamber; the tightening sequence and torque requirements of the doctor blade pressure screws were studied to ensure the flatness and straightness of the blade after installation; and the notch direction of the doctor blade and the closed-loop blade were redesigned to comprehensively achieve leak-proof technology for high-speed operation of the closed-loop coating doctor blade. This invention is designed for high-speed, ultra-wide reverse coating methods, improving production efficiency and reducing energy and labor costs. Production efficiency can be four times higher or even greater than before, while reducing personnel, energy consumption, and cleanroom space, significantly reducing customers' production costs and possessing high practical value. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a high-speed ultra-wide reverse coating device of the present invention;

[0019] Figure 2 This is a structural diagram of the anilox roller device of a high-speed ultra-wide reverse coating device according to the present invention;

[0020] Figure 3 This is a structural diagram of the pressure roller moving device of a high-speed ultra-wide reverse coating device according to the present invention;

[0021] Figure 4 This is a structural diagram of a high-speed ultra-wide reverse coating device with a closed-loop coating blade according to the present invention.

[0022] Figure 5 This is a structural diagram of the coating blade frame device of a high-speed ultra-wide reverse coating device according to the present invention.

[0023] In the diagram, 1. Frame, 2. Anilox roller assembly, 3. Traction roller assembly, 4. Traction pressure roller assembly, 5. Traction gap adjustment device, 6. Pressure roller moving device, 7. Gap adjustment device, 8. Enclosed scraper assembly, 9. Scraper pipeline assembly, 10. Scraper frame, 11. Glue receiving tray assembly, 12. Adjusting roller assembly, 13. Guide roller assembly, 14. Guide roller assembly A, 15. Anilox roller, 16. Bearing housing G, 17. Bearing housing M, 18. Motor bracket, 19. Bearing, 20. Coupling, 21. Drive motor, 22. Moving plate, 23. Linear slide rail, 24. Cylinder, 25. Ink chamber, 26. Pressure plate, 27. Glue baffle plate, 28. Scraper, 29. Scraper wall plate, 30. Connecting shaft, 31. Scraper movement mechanism, 32. Base plate, 33. Air cushion mechanism. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] This invention provides a high-speed, ultra-wide reverse coating apparatus, such as... Figure 1 As shown, the assembly includes a frame 1 and a scraper frame 10, with the scraper frame 10 located on one side of the frame 1. The frame 1 is equipped with an anilox roller assembly 2, a traction roller assembly 3, a traction pressure roller assembly 4, a traction gap adjustment device 5, a pressure roller moving device 6, a gap adjustment device 7, a glue receiving tray assembly 11, an adjusting roller assembly 12, a guide roller assembly 13, and a guide roller assembly A14. The guide roller assembly A14, traction roller assembly 3, traction pressure roller assembly 4, traction gap adjustment device 5, and adjusting roller assembly 12 are mounted on the pressure roller moving device 6, which is located above the anilox roller assembly 2. The gap adjustment device 7 controls the movement of the traction roller assembly 3 relative to the anilox roller assembly 2. The gap between the anilox roller devices 2 is adjusted by adjusting the roller device 12 on one side of the anilox roller device 2. The angle at which the material film enters the anilox roller 15 is controlled by adjusting the roller device 12 up and down, which can adjust the uniformity of the glue coating and improve the coating effect. The doctor blade frame 10 is equipped with a doctor blade pipeline device 9 and a closed doctor blade device 8. The closed doctor blade device 8 can rotate and fit onto the anilox roller device 2 to transfer the glue to the anilox roller device 2, and then transfer it to the material film through the anilox roller device 2. The rotation direction of the anilox roller 15 is opposite to the forward direction of the material film, thereby realizing reverse coating. The amount of glue applied to the material film is adjusted by adjusting the rotation speed of the anilox roller 15.

[0026] like Figure 2As shown, the anilox roller device 2 includes an anilox roller 15, which is mounted on bearing housings G16 and M17 via bearings 19. Bearing housings G16 and M17 are mounted on the frame 1. The drive motor 21 is connected to the anilox roller 15 via a coupling 20, driving the rotation of the anilox roller 15. Because the coating adhesive contains volatile organic solvents, when the solvent evaporates to a certain concentration in the air, it is easy to cause an explosion. The selected coupling 20 is a long-length adjustable stroke universal joint coupling. The motor bracket 18 is mounted on the ground away from the frame 1. Firstly, this can effectively avoid the impact of the vibration of the drive motor 21 on the coating. Secondly, it can isolate the drive motor 21 outside the coating room through the purification partition, reducing the risk of explosion caused by sparks generated by the drive motor 21 and the control circuit.

[0027] like Figure 3 As shown, the pressure roller moving device 6 includes a cylinder 24. The tail of the cylinder 24 is fixed to the wall plate by a fixed seat. The output shaft of the cylinder 24 is connected to the moving plate 22 by screws. The moving plate 22 is fixed to the slider of the vertical linear slide rail 23 by screws. The track of the linear slide rail 23 is installed on the frame by screws. As the cylinder 24 extends and retracts, it can drive the guide roller device A14, traction roller device 3, traction pressure roller device 4, traction gap adjustment device 5, and adjustment roller device 12 on the moving plate 22 to move up and down. Because these devices are located above the anilox roller device 2, when the pressure roller moving device 6 is lifted, the film is separated from the anilox roller 15. When the pressure roller moving device 6 is lowered, the film contacts the anilox roller 15. The traction roller device 3 is located above the anilox roller device 2 and is controlled by the gap adjustment device 7. The gap between the guide roller device 3 and the anilox roller device 2 can be adjusted to change the discharge length and discharge angle of the anilox roller device 2. The adjusting roller device 12 is located on one side of the anilox roller device 2. The adjustment roller device 12 is used to adjust the length and angle of the material film entering the anilox roller 15, thereby adjusting the inlet and outlet angles of the anilox roller device 2, the contact length between the material film and the anilox roller 15, adjusting the amount of adhesive applied, the uniformity of coating, and improving the coating effect. When the pressure roller moving device 6 moves up and down through the cylinder 24, the material length of the guide roller device 14 increases and the material length of the traction roller device 3 decreases. The total change in the length of the material film in the high-speed ultra-wide reverse coating device is less than 25mm, ensuring that the tension fluctuation of the high-speed ultra-wide reverse coating device is less than ±3N when the material film passes through the joint.

[0028] The combined pressure of the traction roller device 3 and the traction pressure roller device 4 serves two purposes: first, it presses down the film, which is then pulled forward by the transmission system of the traction roller device 3; second, it interrupts the tension of the film. By interrupting the tension of the film before the traction roller device 3 through the combined pressure of the traction roller device 3 and the traction pressure roller device 4, coating defects caused by tension fluctuations in the film before the traction roller device 3 are prevented. Furthermore, the length of the film from the traction roller device 3 to the anilox roller 15 can be controlled within 570mm, thereby achieving low film tension during coating and effectively ensuring the coating effect at high speeds and ultra-wide widths.

[0029] like Figure 4 As shown, the closed-loop doctor blade device 8 includes an ink chamber 25, a pressure plate 26 fixed to the ink chamber 25 by screws, a doctor blade 28 pressed against the ink chamber 25 by the pressure plate 26, and a glue baffle 27 fixed to the ink chamber 25 by screws. Excess glue is injected into the ink chamber 25 through the doctor blade pipeline device 9. The glue baffle 27 is fixed inside the ink chamber 25, which buffers the glue entering and leaving the ink chamber 25, reduces the impact of glue impact, and improves the stability of coating. The doctor blade 28, the anilox roller 15, and the ink chamber 25 together form a closed cavity. The anilox roller 15 transfers the glue in the ink chamber 25 to the material film through the closed-loop doctor blade device 8. The straightness of the doctor blade 28 is adjusted by adjusting the tightness of the screws on the pressure plate 26, which improves the sealing performance of the closed-loop doctor blade device 8 and ensures that the glue in the ink chamber 25 does not leak out when the anilox roller device 2 rotates at high speed.

[0030] like Figure 5 As shown, the doctor blade frame 10 includes a doctor blade wall plate 29, a doctor blade movement mechanism 31, a connecting shaft 30, a base plate 32, and an air cushion mechanism 33. The doctor blade movement mechanism 31 is connected to the doctor blade wall plate 29 via the connecting shaft 30. The doctor blade movement mechanism 31 drives the enclosed doctor blade device 8 to move back and forth laterally relative to the anilox roller 15. Because the glue contains particles, if the doctor blade 28 is fixed in the same place relative to the anilox roller 15, the particles in the glue will accumulate at the cutting edge of the doctor blade 28. After the anilox roller 15 passes through the enclosed doctor blade device 8, the glue on the roller surface will have filamentous defects. The movement of the doctor blade 28 can effectively prevent the accumulation of particles at the cutting edge of the doctor blade 28 and improve the coating quality.

[0031] The air cushion mechanism 33 is fixed to the base plate 32 with screws. When the air cushion mechanism 33 is inflated, the entire scraper frame 10 will float, allowing an operator to easily move the scraper frame 10. The surface of the anilox roller 15 is engraved with different diagonal lines to meet different adhesive application requirements. Since the scraper 28 scrapes the surface of the anilox roller 15 to control the adhesive application, the anilox roller 15 will also be damaged after long-term use. Customers will disassemble the anilox roller 15 when changing product specifications or when it is damaged. After the scraper frame 10 is moved away by the air cushion mechanism 33, it will be easier to disassemble the anilox roller 15.

[0032] The working process of the high-speed ultra-wide reverse coating device of this invention: When coating the film, as follows... Figure 1 , Figure 4 As shown, the enclosed doctor blade device 8 can rotate and fit onto the anilox roller device 2, and then the anilox roller device 2 transfers the adhesive in the ink chamber 25 onto the film. The rotation direction of the anilox roller 15 is opposite to the forward direction of the film, thus achieving reverse coating. The amount of adhesive applied to the film is adjusted by adjusting the rotation speed of the anilox roller 15. The gap adjustment device 7 controls the gap between the traction roller device 3 and the anilox roller device 2, which can adjust the output length and output angle of the anilox roller device 2. The adjustment roller device 12 is located on one side of the anilox roller device 2. The up and down adjustment of the adjustment roller device 12 controls the input length and input angle of the film into the anilox roller 15, thereby adjusting the input and output angle of the anilox roller device 2, the contact length between the film and the anilox roller 15, adjusting the amount of adhesive applied, the uniformity of coating, and improving the coating effect. The tension of the film before the traction roller device 3 is interrupted by the pressure of the traction roller device 3 and the traction pressure roller device 4, achieving a low-tension coating effect and improving the stability of coating.

[0033] The working principle of this invention, a novel high-speed ultra-wide reverse coating device, is as follows: the tension of the film is interrupted by the combined pressure of the traction roller device 3 and the traction pressure roller device 4. The output length and output angle of the anilox roller device 2 are adjusted by adjusting the position of the traction roller device 3 and the adjusting roller device 12, thereby adjusting the amount of adhesive applied, the uniformity of coating, and improving the coating effect. The rotation direction of the anilox roller 15 is opposite to the forward direction of the film, thus realizing reverse coating. The amount of adhesive applied to the film is adjusted by adjusting the rotation speed of the anilox roller 15.

Claims

1. A high-speed, ultra-wide reverse coating apparatus, characterized in that, Specifically, it includes a frame (1), on which a pressure roller moving device (6) is installed, and an anilox roller device (2) is installed at the bottom of the pressure roller moving device (6); The pressure roller moving device (6) is provided with a traction roller device (3), which is located above the anilox roller device (2). The traction roller device (3) is connected to an adjusting roller device (12), which is located on one side of the anilox roller device (2). It also includes a gap adjusting device (7) set on the frame (1), with the adjusting roller device (12) set on the gap adjusting device (7). The pressure roller moving device (6) is also provided with a traction pressure roller device (4) above the traction roller device (3), and a traction gap adjusting device (5) is installed on one side of the traction pressure roller device (4). The pressure roller moving device (6) is also provided with a guide roller device A (14), and a guide roller device (13) is provided on one side of the frame (1). The guide roller device (13) is connected to the traction gap adjusting device (5) through the guide roller device A (14). The frame (1) is located at the bottom of the anilox roller device (2) and is also provided with a glue receiving tray device (11); a scraper frame (10) is provided on the side of the frame (1) near the anilox roller device (2), and a closed scraper device (8) is provided on the scraper frame (10), which is connected to the anilox roller device (2).

2. The high-speed ultra-wide reverse coating apparatus according to claim 1, characterized in that, The anilox roller device (2) includes an anilox roller (15). The frame (1) is provided with bearing seats G (16) and bearing seats M (17) that cooperate with the anilox roller (15). The anilox roller (15) is connected to the bearing seats G (16) and bearing seats M (17) respectively through bearings (19). A section of the anilox roller (15) is connected to a motor (21) through a coupling (20). The enclosed scraper device (8) rotates and matches the anilox roller (15).

3. The high-speed ultra-wide reverse coating apparatus according to claim 1, characterized in that, The pressure roller moving device (6) includes two parallel cylinders (24). One end of the cylinder (24) is fixed to the wall plate on one side of the frame (1). The output end of the cylinder (24) is connected to a moving plate (22). The guide roller device A (14), traction roller device (3), traction pressure roller device (4), traction gap adjustment device (5), and adjustment roller device (12) are all located on the moving plate (22).

4. The high-speed ultra-wide reverse coating apparatus according to claim 3, characterized in that, The two ends of the movable plate (22) are respectively provided with linear slide rails (23) perpendicular to the movable plate (22). The linear slide rails (23) are provided on the frame (1). The two ends of the movable plate (22) are movably connected to the linear slide rails (23) through sliders.

5. The high-speed ultra-wide reverse coating apparatus according to claim 1, characterized in that, The scraper frame (10) includes a base plate (32), on which two parallel scraper wall plates (29) are provided. The scraper wall plates (29) are perpendicular to the base plate (32). One side of the scraper wall plate (29) is connected to the scraper movement mechanism (31) through a connecting shaft (30). The enclosed scraper device (8) is located on one side of the scraper wall plate (29).

6. The high-speed ultra-wide reverse coating apparatus according to claim 5, characterized in that, The bottom of the base plate (32) is also provided with an air cushion mechanism (33), which is an inflatable air cushion.

7. The high-speed ultra-wide reverse coating apparatus according to claim 1, characterized in that, The enclosed scraper device (8) includes an ink chamber (25), a scraper (28) is provided at one end of the ink chamber (25) near the anilox roller (15), and a scraper pipeline device (9) communicating with the ink chamber (25) is also provided on the scraper frame (10). An adhesive outlet is opened on the side of the ink chamber (25) near the anilox roller (15).

8. The high-speed ultra-wide reverse coating apparatus according to claim 7, characterized in that, The ink cavity (25) is also provided with a glue baffle (27), which is located at the glue inlet and glue outlet of the ink cavity (25). The scraper (28) is connected to the ink cavity (25) through a pressure plate, and a screw is connected between the pressure plate and the scraper (28).

9. The high-speed ultra-wide reverse coating apparatus according to claim 1, characterized in that, The gap adjustment device (7) includes a linear slide rail fixed horizontally on the frame (1), a lead screw is arranged parallel to one side of the linear slide rail, and an inclined block matching the linear slide rail is sleeved on the lead screw. The inclined block is located below the pressure roller moving device (6). The lead screw is connected to a reducer, and a handwheel is provided at one end of the reducer.

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