A wiping device for a coating die

Abstract

This invention belongs to the field of slot coating technology and discloses a wiping device for a coating die. The wiping device includes a wiping assembly, an automatic take-up and take-down mechanism, and a moving assembly. The wiping assembly includes a sliding seat and two flexible wiping elements, each with a wiping surface and a V-shaped groove formed between the two wiping surfaces. One end of the cleaning cloth of the automatic take-up and take-down mechanism is wound around a feed roller, and the other end is wound around a take-up roller, so that the cleaning cloth moves along a first direction and passes between the V-shaped groove and the coating die. The lip of the coating die extends along a second direction, with the first and second directions forming an angle. The moving assembly drives the wiping assembly to move along the second direction. This wiping device can effectively clean the coating die, improving the cleaning ability and reducing the frequency of cleaning the wiping elements, thus improving efficiency.

Description

Technical Field

[0001] This invention relates to the field of slot coating technology, and more particularly to a wiping device for a coating die head. Background Technology

[0002] Currently, in the fields of advanced semiconductor packaging, panel display manufacturing, perovskite photovoltaic module manufacturing, and lithium-ion battery electrode manufacturing, slot coating technology is widely used to deposit various functional slurries or solution coatings due to its significant advantages in film uniformity, material utilization, and production efficiency. The coating die is the core component of the slot coating equipment. It discharges the coating liquid through a precise slot-type outlet, and sheet-like substrates such as glass substrates move in one direction to form a coating film on the substrate.

[0003] After the coating die has finished coating, coating liquid remains near its lip. During subsequent coating processes, this residual coating liquid mixes with the liquid ejected from the outlet and is applied to the substrate, resulting in an unevenly thickened coating surface. Furthermore, even without applying the remaining coating liquid, streaks appear along the coating direction, starting from the remaining liquid. To avoid these problems, the nozzle surface and the beveled lip of the slit nozzle must be cleaned after each coating to remove any adhering coating liquid.

[0004] Chinese patent application publication number CN102491320A discloses a method for cleaning the slit of a coating head and a scraping device. The scraping device uses a second scraper with a V-shaped cutting edge to scrape the lip of the coating head. The lip of the coating head enters the V-shaped cutting edge, and the sidewall of the V-shaped cutting edge slides on the lip of the coating head, thereby removing the coating liquid.

[0005] However, as the coating liquid gradually accumulates at the V-shaped cutting edge, the cleaning ability of the scraping device on the coating die head will decrease, requiring the V-shaped cutting edge to be cleaned, which will affect production efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide a wiping device for a coating die head, which can clean the coating die head, improve the cleaning ability of the coating die head, reduce the frequency of cleaning the wiping parts, and improve efficiency.

[0007] To achieve this objective, the present invention adopts the following technical solution: A wiping device for a coating die head, used for wiping coating liquid on the coating die head, comprising: The wiping assembly includes a sliding base and two flexible wiping members disposed on the sliding base. The front end of each wiping member is provided with a wiping surface, and a V-shaped groove is formed between the two wiping surfaces. An automatic feeding and receiving mechanism includes a cleaning cloth, a support plate, a feeding wheel, and a receiving wheel. The feeding wheel and the receiving wheel are rotatably mounted on the support plate. One end of the cleaning cloth is wrapped around the feeding wheel, and the other end of the cleaning cloth is wrapped around the receiving wheel, so that the cleaning cloth moves along a first direction and passes between the V-groove and the coating die head. When the two wiping components are close to each other, the wiping surface presses the cleaning cloth against the lip of the coating die head. The lip of the coating die head extends along a second direction, and the first direction and the second direction are set at an angle. A movable component for driving the wiping component to move along the second direction.

[0008] Preferably, the sliding seat is movably disposed on the moving assembly along the first direction so that the V-groove is vertically aligned with the lip of the coating die.

[0009] Preferably, the automatic take-up and take-down mechanism further includes a plurality of tensioning wheels, which are rotatably disposed on the support plate or the moving component. The plurality of tensioning wheels roll against the cleaning cloth, and at least one of the tensioning wheels is movable to adjust the tension of the cleaning cloth.

[0010] Preferably, the automatic take-up and take-down mechanism further includes a pressing component, which is disposed between the wiping component and the take-up roller. The pressing component includes a first pressing roller, a second pressing roller, and a rotating arm. The first pressing roller is rotatably disposed on the support plate, the second pressing roller is rotatably disposed at one end of the rotating arm, and the other end of the rotating arm is rotatably disposed on the support plate. The cleaning cloth passes through the space between the first pressing roller and the second pressing roller.

[0011] Preferably, the pressing assembly further includes an elastic element, one end of which is connected to the support plate and the other end of which is connected to the rotating arm. The elastic element drives the rotating arm to rotate so that the second pressing wheel presses the cleaning cloth against the first pressing wheel.

[0012] Preferably, the automatic take-up and take-down mechanism further includes two first adjusting wheels located upstream of the wiping assembly, with the cleaning cloth passing between the two first adjusting wheels to allow the cleaning cloth to pass horizontally through the wiping assembly.

[0013] Preferably, the wiping assembly further includes two support wheels, which are located on both sides of the wiping assembly in the first direction. The highest point of the two support wheels is at the same height as the highest point of the wiping assembly, and the cleaning cloth is supported by the two support wheels in sequence.

[0014] Preferably, the automatic take-up and take-down mechanism further includes a first cleaning tank, in which a first cleaning liquid is disposed, the first cleaning tank being located upstream of the wiping assembly, and the cleaning cloth being partially immersed in the first cleaning liquid.

[0015] Preferably, the wiping assembly further includes a tension roller, each of the wiping elements is mounted on the sliding seat via a fixed seat, the tension roller is rotatably mounted between the two fixed seats, and the cleaning cloth passes around the tension roller and is tensioned by the tension roller.

[0016] Preferably, the front end of the wiping member is further provided with an abutting surface, which is connected to the wiping surface and located below the wiping surface. The abutting surface extends out of the front end of the fixing seat. When the abutting surfaces of the two wiping members abut against each other, the two fixing seats are spaced apart from the tension roller.

[0017] The beneficial effects of this invention are: This invention provides a wiping device for a coating die. In this wiping device, when two flexible wiping elements approach each other, one wiping surface presses a cleaning cloth against one side of the lip of the coating die, while the other wiping surface presses the cleaning cloth against the other side of the lip, allowing the cleaning cloth to adhere to the lip of the coating die. At this time, the wiping assembly moves relative to the coating die in a second direction, and the two wiping elements can scrape off excess coating liquid from the coating die, keeping the lip of the coating die clean. Because the cleaning cloth moves in a first direction, the coating liquid scraped off by the wiping elements can detach from the wiping elements as they move, thereby ensuring that the coating liquid does not accumulate on the surfaces of the wiping elements and the cleaning cloth when cleaning the coating die, improving the cleaning ability of the wiping assembly for the coating die.

[0018] The wiping device of this coating die head can clean the coating die head, improving the cleaning ability of the coating die head and reducing the frequency of cleaning the wiping parts, thus improving efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the wiping mechanism provided in an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the wiping mechanism provided in an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the wiping assembly provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the wiping component and fixing base provided in an embodiment of the present invention.

[0020] In the picture: 100. Coating die head; 1. Wiping assembly; 111. Fixing base; 1111. Limiting barrier; 1112. First limiting rib; 1113. Adjusting platform; 1114. Limiting platform; 112. Wiping component; 1121. Fixing part; 1122. Wiping part; 1123. Wiping surface; 1124. Abutting surface; 113. Cover plate; 1131. Second limiting rib; 12. Driving component; 13. V-groove; 14. Limiting structure; 141. Limiting component; 142. Fixing component; 15. Sliding seat; 16. Tensioning roller; 17. Slide rail; 2. Moving component; 21. Linear module; 22. Moving base; 3. Automatic feeding and taking-up mechanism; 31. Cleaning cloth; 32. Support plate; 33. Feeding roller; 34. Taking-up roller; 35. Pressing assembly; 351. First pressing roller; 352. Second pressing roller; 353. Rotating arm; 354. Rotating shaft; 355. Elastic element; 356. Drive rod; 357. First adjusting roller; 358. Support roller; 359. Tensioning roller. Detailed Implementation

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] In high-tech industries such as flat panel displays, advanced semiconductor packaging, perovskite solar cells, and lithium-ion battery electrode manufacturing, the precise and uniform coating of functional films is a key process determining the performance of the final product. Among these, slot extrusion coating technology, with its excellent film thickness uniformity, high material utilization rate, and suitability for large-area, continuous production, has become the mainstream coating method for depositing functional liquids such as photoresists, encapsulating adhesives, electrode pastes, and optical adhesives in these fields.

[0024] Slit coating involves applying external force to a coating solution, forcing it through a slit in the lip of a coating die and coating the substrate to form a uniform film. When coating stops, the coating solution stops extruded from the slit, reducing its fluidity at the lip. This makes the solution prone to solidification, forming dry material, and clogging the slit, thus reducing product yield and potentially posing safety hazards to the battery.

[0025] like Figure 1 and Figure 2As shown, this embodiment provides a wiping device for a coating die head (hereinafter referred to as the wiping device). The wiping device includes a wiping component 1 and a moving component 2. The wiping component 1 includes a sliding seat 15 and two flexible wiping elements 112 disposed on the sliding seat 15. The front end of the wiping element 112 is provided with a wiping surface 1123, and a V-shaped groove 13 is formed between the two wiping surfaces 1123. The sliding seat 15 moves along a first direction (X direction in the figure), and the lip of the coating die head 100 extends along a second direction (Y direction in the figure). The first direction and the second direction are set at an angle. The moving component 2 is used to drive the wiping component 1 to move along the second direction.

[0026] In this wiping device, when the two flexible wiping elements 112 approach each other, one wiping surface 1123 presses against one side of the lip of the coating die 100, causing the other wiping surface 1123 to press against the other side of the lip of the coating die 100. The flexibility of the wiping elements 112 allows them to better conform to the lip of the coating die 100. At this time, the wiping assembly 1 moves relative to the coating die 100 in the second direction, and the two wiping elements 112 can scrape off excess coating liquid on the coating die 100, keeping the lip of the coating die 100 clean.

[0027] In this embodiment, the moving component 2 includes a linear module 21 and a moving base 22. A sliding base 15 is disposed on the moving base 22. The moving base 22 is movably disposed on the linear module 21 along a second direction so that the wiping component 1 moves along the extension direction of the lip of the coating die head 100. In some embodiments, the linear module 21 may be a linear motor, an electric cylinder, or a lead screw and nut structure, etc., as long as it can drive the moving base 22 to move in a straight line, which will not be elaborated here.

[0028] In this embodiment, the sliding seat 15 is movably disposed on the moving assembly 2 along the first direction, specifically on the moving seat 22, so that the V-groove 13 is vertically aligned with the lip of the coating die 100. The wiping assembly 1 can move along the first direction to below the coating die 100. At this time, the coating die 100 is controlled to move downward or the wiping device is controlled to move upward, so that the coating die 100 enters the V-groove 13 of the wiping assembly 1. The moving seat 22 moves along the second direction, thereby cleaning the coating liquid remaining on the lip of the coating die 100, keeping the lip of the coating die 100 clean.

[0029] In addition, the moving component 2 also includes a power component (not shown in the figure), which drives the moving base 22 to move along the linear module 21. Specifically, the power component includes an electric cylinder capable of driving the moving base 22 to move linearly. In some embodiments, the power component may also be a lead screw and nut drive structure or a linear motor, or other structures capable of linear drive, which will not be described in detail here.

[0030] It is worth noting that in this embodiment, the first direction and the second direction are perpendicular to each other.

[0031] In this embodiment, the wiping assembly 1 includes a sliding seat 15, which is slidably connected to the movable seat 22 via a slide rail 17 to ensure the stability of the wiping assembly 1 during movement.

[0032] It is worth noting that in some embodiments, the wiping device may not be equipped with the moving component 2. Instead, the coating die 100 is moved relative to the wiping component 1 by moving the coating die 100, so that the wiping component 1 cleans the coating liquid on the coating die 100.

[0033] like Figures 1-3 As shown, the wiping assembly 1 also includes a driving member 12. Each wiping member 112 is mounted on the sliding seat 15 via a fixed seat 111. The driving member 12 drives the two wiping members 112 to move closer or further apart from each other along a first direction, thereby adjusting the pressure of the wiping member 112 on the lip of the coating die head 100. This prevents the pressure on the lip of the coating die head 100 from being too high or too low, ensuring that the wiping assembly 1 can generate sufficient pressure on the lip of the coating die head 100 to have sufficient cleaning ability, while also preventing damage to the lip of the coating die head 100 and the wiping member 112 due to excessive pressure.

[0034] However, as the coating liquid gradually accumulates at the V-shaped cutting edge, the cleaning ability of the scraping device on the coating die 100 decreases, requiring the V-shaped cutting edge to be cleaned, which affects production efficiency.

[0035] like Figure 1 and Figure 2 As shown, in order to solve the above problems, the wiping device provided in this embodiment also includes an automatic take-up mechanism 3. The automatic take-up mechanism 3 includes a cleaning cloth 31. The cleaning cloth 31 moves along the first direction and passes through the V-groove 13 and the coating die head 100. When the two wiping members 112 approach each other, the wiping surface 1123 presses the cleaning cloth 31 against the lip of the coating die head 100.

[0036] As the cleaning cloth 31 moves along the first direction, the coating liquid scraped off by the wiping member 112 can be removed from the wiping member 112 as the cleaning cloth 31 moves, thereby ensuring that the coating liquid will not accumulate on the surface of the wiping member 112 and the cleaning cloth 31 when the wiping device cleans the coating die head 100, thus improving the cleaning ability of the wiping assembly 1 on the coating die head 100.

[0037] The wiping device can clean the coating die head 100, improving the cleaning ability of the coating die head 100 and reducing the frequency of cleaning the wiping part 112, thus improving efficiency.

[0038] The driving component 12 is mounted on the sliding seat 15. The front end of the wiping component 112 refers to the end of the wiping component 112 facing the other wiping component 112. That is, when the two wiping components 112 approach each other, both wiping components 112 move forward. When the two wiping components 112 move away from each other, both wiping components 112 move backward.

[0039] like Figure 4 As shown, the front end of the wiping member 112 is also provided with an abutment surface 1124. The abutment surface 1124 is connected to the wiping surface 1123 and is located below the wiping surface 1123. The abutment surface 1124 extends out of the front end of the fixing base 111. When the abutment surfaces 1124 of the two wiping members 112 abut against each other, the wiping surfaces 1123 of the two wiping members 112 form a V-groove 13.

[0040] When the two wiping components 112 approach each other, their contact surfaces 1124 preferentially abut. At this time, the fixing seats 111 of the two wiping components 112 are spaced apart to avoid collision between the fixing seats 111 of the two wiping components 112. Moreover, the two wiping surfaces 1123 can form a V-groove 13. When the lip of the coating die 100 enters the V-groove 13, the wiping assembly 1 moves relative to the coating die 100 in the second direction. The sidewall of the V-groove 13 can scrape off the excess coating liquid on the lip of the coating die 100, keeping the surface of the coating die 100 clean. If it is necessary to increase the pressure of the wiping component 112 on the coating die 100, the two fixing seats 111 can be controlled to continue to approach each other. That is to say, the contact surface 1124 extends out of the front end of the fixing seat 111, which can provide a margin for increasing the pressure on the coating die 100.

[0041] In this embodiment, the fixing base 111 is provided with a limiting wall 1111, and the rear end of the wiping member 112 abuts against the limiting wall 1111. The limiting wall 1111 can both fix the wiping member 112 and ensure that the contact surface 1124 of the wiping member 112 extends beyond the front end of the fixing base 111, and provide a supporting force in the first direction for the wiping member 112 when the two wiping members 112 approach and abut against each other, so as to prevent the wiping member 112 from displacing and ensure that the wiping member 112 only undergoes elastic deformation to increase the pressure on the coating die head 100.

[0042] In this embodiment, the fixing base 111 is provided with a first limiting rib 1112, and the wiping member 112 is provided with a first limiting groove. The first limiting rib 1112 is engaged with the first limiting groove to limit the wiping member 112 in a first direction. The first limiting rib 1112 can improve the stability of the wiping member 112 and provide support for the wiping member 112 in the first direction. When the two fixing bases 111 approach each other to increase the pressure of the wiping member 112 on the coating die head 100, the first limiting rib 1112 can provide support for the wiping member 112 in the first direction, avoiding large-scale deformation of the wiping member 112 that would prevent the wiping surface 1123 from completely adhering to the lip of the coating die head 100.

[0043] It is understandable that when the wiping component 112 is compressed and undergoes elastic deformation, it is prone to move upward, resulting in excessive deformation or direct detachment from the fixing seat 111. To avoid this, the wiping assembly 1 also includes a cover plate 113, which is connected to the fixing seat 111. The wiping component 112 includes a fixing part 1121 and a wiping part 1122. The fixing part 1121 is disposed between the cover plate 113 and the fixing seat 111, and the wiping part 1122 is fixedly connected to the fixing part 1121. The wiping surface 1123 and the contact surface 1124 are both disposed at the front end of the wiping part 1122.

[0044] The cover plate 113 can clamp the wiping member 112 together with the fixing seat 111, improving the stability of the wiping member 112. The part of the wiping member 112 located between the cover plate 113 and the fixing seat 111 will hardly deform, thereby reducing the deformation range of the wiping member 112 and ensuring the fit between the wiping surface 1123 and the lip of the coating die head 100. The front end of the wiping part 1122 is provided with a wiping surface 1123 and an abutment surface 1124 to form a V-groove 13.

[0045] Preferably, the cover plate 113 abuts against the rear end of the wiping part 1122. When the two wiping parts 112 form a V-groove 13 to abut against the coating die head 100, the cover plate 113 can support the wiping part 1122, which can increase the pressure of the wiping part 1122 on the lip of the coating die head 100 to improve the cleaning power, and can also prevent the wiping part 1122 from being excessively deformed, which would cause the wiping surface 1123 to fail to fully fit the lip of the coating die head 100.

[0046] In this embodiment, the fixing part 1121 is provided with a second limiting groove, and the cover plate 113 is provided with a second limiting rib 1131. The second limiting rib 1131 is engaged with the second limiting groove to limit the wiping member 112 in the first direction. The provision of the second limiting rib 1131 and the second limiting groove can further improve the reliability of the connection between the wiping member 112 and the fixing seat 111, ensuring that the wiping member 112 can be stably fixed without the cover plate 113 being removed.

[0047] Furthermore, along the first direction, the first limiting rib 1112 is located in front of the second limiting rib 1131. From the structure of the wiping member 112, it can be seen that the wiping surface 1123 is located behind the contact surface 1124, allowing the first limiting rib 1112 to be closer to the contact surface 1124, and the second limiting member 141 is also not far from the wiping surface 1123. This ensures that the supporting effect of the first limiting rib 1112 on the contact surface 1124 and the supporting effect of the second limiting rib 1131 on the wiping surface 1123 are both fully utilized, guaranteeing that the wiping member 112 as a whole will not experience severe local deformation, and allowing the wiping part 1122 to deform uniformly on the wiping surface 1123 and the contact surface 1124.

[0048] Preferably, the first limiting groove and the second limiting groove do not overlap in the vertical direction. That is, the vertical projections of the first limiting groove and the second limiting groove on the fixing base 111 do not intersect. This structure ensures that the first limiting groove and the second limiting groove of the wiping member 112 are completely staggered, avoiding the reduction in overall strength caused by localized excessive thinness of the wiping member 112 and improving its service life.

[0049] like Figure 3 As shown, the wiping assembly 1 also includes a limiting structure 14, which includes a limiting member 141. The limiting member 141 is disposed on a fixed seat 111 and can abut against another fixed seat 111 to limit the minimum distance between the two fixed seats 111. The limiting member 141 can prevent the two fixed seats 111 from colliding with each other, and can also ensure the degree of compression of the wiping member 112 by the minimum distance, so that the pressure of the wiping member 112 on the lip of the coating die head 100 remains stable, neither too high nor too low, thus ensuring cleaning ability.

[0050] Preferably, the limiting member 141 is movably disposed on a fixed base 111 to adjust the minimum distance between the two fixed bases 111. The operator can change the minimum distance between the two fixed bases 111 by moving the limiting member 141, thereby adjusting the pressure of the wiping member 112 on the lip of the coating die head 100, avoiding the problem of excessive pressure reducing the life of the wiping member 112 or insufficient pressure resulting in insufficient cleaning ability.

[0051] Furthermore, the limiting structure 14 also includes a fixing member 142, which is used to fix the position of the limiting member 141 to prevent the limiting member 141 from being displaced due to the vibration of the wiping assembly 1 during long-term use, thus affecting the stability of the pressure of the wiping member 112 on the coating die head 100.

[0052] Specifically, the limiting component 141 includes a limiting screw, and the fixing component 142 is a fixing nut. One fixing seat 111 is provided with an adjusting platform 1113, and the other fixing seat 111 is provided with a limiting platform 1114. The limiting screw passes through the adjusting platform 1113 and is threadedly connected to it. The limiting screw abuts against the limiting platform 1114 to limit the minimum distance between the two fixing seats 111. The fixing nut is fitted onto the limiting screw. When the fixing nut abuts against the adjusting platform 1113, the position of the limiting screw is fixed. Using a limiting screw to limit the minimum distance between the two fixing seats 111 and using a fixing nut to fix the position of the limiting screw results in a simple structure, low cost, and ease of operation for operators.

[0053] like Figures 1-3 As shown, the wiping assembly 1 also includes a tension roller 16, which is rotatably disposed between two fixed seats 111. The cleaning cloth 31 passes around the tension roller 16 and is tensioned by the tension roller 16. The tension roller 16 ensures the stability of the overall shape of the cleaning cloth 31, eliminating the need to use the coating die head 100 to press the cleaning cloth 31 between the two wiping components 112. Moreover, the tension roller 16 also ensures that the cleaning cloth 31 is in close contact with the surface of the wiping component 112, preventing the cleaning cloth 31 from slackening and folding, which would result in inadequate contact between the wiping component 112 and the lip of the coating die head 100, thus affecting the cleaning effect. Furthermore, since the tension roller 16 can make the cleaning cloth 31 adhere tightly to the surface of the wiping member 112, the cleaning cloth 31 is aligned with the inclination direction of the lip of the coating die 100. When the cleaning cloth 31 moves along the first direction, there is only surface-to-surface sliding friction between the cleaning cloth 31 and the lip of the coating die 100. The cleaning cloth 31 does not need to slide against the bottom of the lip of the coating die 100, which greatly reduces wear. Since the wiping member 112 is flexible, it can also avoid wear on the cleaning cloth 31, thereby avoiding the generation of microparticles.

[0054] In this embodiment, the automatic take-up and take-down mechanism 3 further includes a first cleaning tank (not shown in the figure), which contains a first cleaning liquid. The first cleaning tank is located upstream of the wiping assembly 1, and the cleaning cloth 31 is partially immersed in the first cleaning liquid. Wetting the cleaning cloth 31 with the first cleaning liquid softens the hardened and solidified coating liquid during the cleaning process, making it easier for the coating liquid to adhere to the cleaning cloth 31 and move with it. It is worth noting that the first cleaning liquid can be water, alcohol, or other solvents, and the selection depends on the coating liquid and the materials used in the coating substrate; this will not be elaborated further here.

[0055] In this embodiment, the cleaning cloth 31 can be a non-woven fabric. The non-woven fabric has a loose fiber structure, which can effectively absorb residual coating liquid, ensure cleaning ability, avoid secondary pollution, and is not prone to fiber shedding, thus reducing the amount of impurities remaining on the lip surface of the coating die 100 after cleaning.

[0056] like Figure 1 and Figure 2 As shown, in order to reduce the frequency of operators changing the cleaning cloth 31, the automatic take-up and take-down mechanism 3 also includes a support plate 32, a cloth-laying wheel 33 and a cloth-receiving wheel 34. The cloth-laying wheel 33 and the cloth-receiving wheel 34 are both rotatably mounted on the support plate 32. The support plate 32 is mounted on the movable seat 22. One end of the cleaning cloth 31 is wrapped around the cloth-laying wheel 33 and the other end of the cleaning cloth 31 is wrapped around the cloth-receiving wheel 34.

[0057] The support plate 32 is the main support structure of the automatic feeding and taking-up mechanism 3. The support plate 32 is fixedly connected to the movable seat 22. Both the feeding wheel 33 and the taking-up wheel 34 can rotate. When the taking-up wheel 34 rotates actively, it can drive the feeding wheel 33 to rotate through the cleaning cloth 31, thereby enabling the feeding wheel 33 to release the cleaning cloth 31 and the taking-up wheel 34 to roll up the cleaning cloth 31 that has been cleaned on the lip of the coating die head 100.

[0058] Preferably, the automatic take-up and take-down mechanism 3 further includes a pressing component 35, which is disposed between the wiping component 1 and the take-up roller 34. The pressing component 35 includes a first pressing roller 351, a second pressing roller 352, and a rotating arm 353. The first pressing roller 351 is rotatably disposed on the support plate 32, the second pressing roller 352 is rotatably disposed at one end of the rotating arm 353, and the other end of the rotating arm 353 is rotatably disposed on the support plate 32. The cleaning cloth 31 passes through the space between the first pressing roller 351 and the second pressing roller 352.

[0059] By utilizing the pressure between the first pressure roller 351 and the second pressure roller 352, the cleaning cloth 31 between the pressing assembly 35 and the take-up roller 34 can be tightened, thereby improving the tension of the cleaning cloth 31 wound on the take-up roller 34 and ensuring the consistency of the tension of the cleaning cloth 31, reducing the total volume of the cleaning cloth 31 on the take-up roller 34, saving space, and enabling the take-up roller 34 to take up more cleaning cloth 31.

[0060] The rotating arm 353 is rotatably connected to the support plate 32 via a rotating shaft 354, and the line of the rotating shaft 354 of the rotating arm 353 is the central axis of the rotating shaft 354.

[0061] like Figure 2 As shown, the pressing assembly 35 further includes an elastic element 355. One end of the elastic element 355 is connected to the support plate 32, and the other end is connected to the rotating arm 353. The elastic element 355 drives the rotating arm 353 to rotate so that the second pressing roller 352 presses the cleaning cloth 31 against the first pressing roller 351. The elastic element 355 can increase the pressure between the first pressing roller 351 and the second pressing roller 352, thereby further improving the consistency of the tension of the cleaning cloth 31 on the take-up roller 34. It can also make the cleaning cloth 31 on the take-up roller 34 wound more tightly, and the take-up roller 34 can take up more cleaning cloth 31.

[0062] In some embodiments, the elastic element 355 is a torsion spring, which is sleeved on the rotating shaft 354. One end of the torsion spring is connected to the support plate 32, and the other end of the torsion spring is connected to the rotating arm 353. The torsion spring can provide torque to the rotating arm 353, thereby driving the rotating arm 353 to rotate toward the first pressure wheel 351.

[0063] In some embodiments, the elastic element 355 may also be a tension spring or a spring, and the rotating arm 353 has a drive rod 356. One end of the tension spring or spring is connected to the drive rod 356, and the other end of the tension spring or spring is connected to the support plate 32. The tension spring or spring provides torque to the rotating arm 353 through the drive rod 356, thereby driving the rotating arm 353 to rotate toward the first pressure wheel 351.

[0064] Preferably, the automatic take-up and take-down mechanism 3 further includes a second cleaning tank (not shown in the figure), which contains a second cleaning liquid. The second cleaning tank is located downstream of the wiping assembly 1, and the cleaning cloth 31 is partially immersed in the second cleaning liquid. The second cleaning liquid can clean the cleaning cloth 31 with the coating liquid adhering to it, thereby leaving the coating liquid adhering to the cleaning cloth 31 in the second cleaning tank, preventing the coating liquid from curing and affecting the winding of the cleaning cloth 31 on the take-up roller 34 as it is rolled up.

[0065] In this embodiment, the top surface of the cover plate 113 and the top surface of the wiping part 1122 of the wiping member 112 are on the same plane to ensure that the cleaning cloth 31 passes smoothly through the two wiping members 112.

[0066] like Figure 1 and Figure 2 As shown, the automatic retraction mechanism 3 further includes two first adjusting wheels 357 located upstream of the wiping assembly 1. The cleaning cloth 31 passes between the two first adjusting wheels 357 so that the cleaning cloth 31 passes horizontally through the two wiping members 112. The cleaning cloth 31 can be set parallel to the top surface of the cover plate 113 and the top surface of the wiping part 1122, which can further reduce wear and make the cleaning cloth 31 fit more closely to the top surface of the cover plate 113 and the top surface of the wiping part 1122 of the wiping member 112, ensuring the stability of the cleaning cloth 31.

[0067] Preferably, the wiping assembly 1 further includes two support wheels 358, which are located on both sides of the two fixed seats 111 in the first direction. The highest point of the two support wheels 358 is at the same height as the highest point of the two wiping parts 112. The cleaning cloth 31 is supported by the two support wheels 358 in sequence. The arrangement of the two support wheels 358 enables the cleaning cloth 31 to be positioned more accurately between the two support wheels 358, effectively avoiding friction between the cleaning cloth 31 and the rear edge of the cover plate 113, and allowing the cleaning cloth 31 to better fit the top surface of the cover plate 113 and the top surface of the wiping part 1122 of the wiping part 112.

[0068] like Figure 1 and Figure 2 As shown, the automatic retraction mechanism 3 also includes multiple tensioning rollers 359. These rollers 359 are rotatably mounted on the support plate 32 or the moving assembly 2. The rollers 359 roll and abut against the cleaning cloth 31, adjusting the tension of the cleaning cloth 31 and changing its direction. Specifically, the tensioning rollers 359 are mounted on the moving assembly 2, and more specifically on the moving base 22.

[0069] Furthermore, at least one tensioning wheel 359 is movable to adjust the tension of the cleaning cloth 31. When the sliding seat 15 moves in the first direction, the tension of the cleaning cloth 31 limits the travel distance of the sliding seat 15. If the sliding seat 15 travels a long distance, the cleaning cloth 31 may break. At this time, the movable tensioning wheel 359 can adjust the tension of the cleaning cloth 31 by its own movement, ensuring that the cleaning cloth 31 does not break and that a suitable tension is maintained.

[0070] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A wiping device for a coating die head, used for wiping the coating liquid on the coating die head (100), characterized in that, include: The wiping assembly (1) includes a sliding seat (15) and two flexible wiping members (112) disposed on the sliding seat (15). The front end of the wiping member (112) is provided with a wiping surface (1123) and a V-shaped groove (13) is formed between the two wiping surfaces (1123). The automatic feeding and receiving mechanism (3) includes a cleaning cloth (31), a support plate (32), a feeding wheel (33), and a receiving wheel (34). The feeding wheel (33) and the receiving wheel (34) are rotatably mounted on the support plate (32). One end of the cleaning cloth (31) is wrapped around the feeding wheel (33), and the other end of the cleaning cloth (31) is wrapped around the receiving wheel (34), so that the cleaning cloth (31) moves along the first direction and passes between the V-groove (13) and the coating die head (100). When the two wiping members (112) approach each other, the wiping surface (1123) presses the cleaning cloth (31) against the lip of the coating die head (100). The lip of the coating die head (100) extends along the second direction, and the first direction and the second direction are set at an angle. The moving component (2) is used to drive the wiping component (1) to move along the second direction.

2. The wiping device for the coating die head according to claim 1, characterized in that, The sliding seat (15) is movably disposed on the moving assembly (2) along the first direction so that the V-groove (13) is directly aligned with the lip of the coating die (100) in the vertical direction.

3. The wiping device for the coating die head according to claim 2, characterized in that, The automatic retraction mechanism (3) further includes a plurality of tensioning wheels (359), which are rotatably mounted on the support plate (32) or the moving component (2). The plurality of tensioning wheels (359) roll against the cleaning cloth (31), and at least one of the tensioning wheels (359) is movable to adjust the tension of the cleaning cloth (31).

4. The wiping device for the coating die head according to claim 1, characterized in that, The automatic take-up and take-down mechanism (3) further includes a pressing component (35), which is disposed between the wiping component (1) and the take-up roller (34). The pressing component (35) includes a first pressing roller (351), a second pressing roller (352) and a rotating arm (353). The first pressing roller (351) is rotatably disposed on the support plate (32), the second pressing roller (352) is rotatably disposed at one end of the rotating arm (353), and the other end of the rotating arm (353) is rotatably disposed on the support plate (32). The cleaning cloth (31) passes between the first pressing roller (351) and the second pressing roller (352).

5. The wiping device for the coating die head according to claim 4, characterized in that, The pressing assembly (35) also includes an elastic element (355), one end of which is connected to the support plate (32), and the other end of which is connected to the rotating arm (353). The elastic element (355) drives the rotating arm (353) to rotate so that the second pressing wheel (352) presses the cleaning cloth (31) against the first pressing wheel (351).

6. The wiping device for the coating die head according to claim 1, characterized in that, The automatic take-up and take-down mechanism (3) also includes two first adjustment wheels (357) located upstream of the wiping assembly (1), and the cleaning cloth (31) passes between the two first adjustment wheels (357) so that the cleaning cloth (31) passes horizontally through the wiping assembly (1).

7. The wiping device for the coating die head according to claim 1, characterized in that, The wiping assembly (1) also includes two support wheels (358), which are located on both sides of the wiping assembly (1) in the first direction. The highest point of the two support wheels (358) is at the same height as the highest point of the wiping assembly (1). The cleaning cloth (31) is supported by the two support wheels (358) in sequence.

8. The wiping device for the coating die head according to claim 1, characterized in that, The automatic take-up and take-down mechanism (3) also includes a first cleaning tank, in which a first cleaning liquid is provided. The first cleaning tank is located upstream of the wiping assembly (1), and the cleaning cloth (31) is partially immersed in the first cleaning liquid.

9. The wiping device for the coating die head according to any one of claims 1 to 8, characterized in that, The wiping assembly (1) further includes a tension roller (16), each of the wiping elements (112) is disposed on the sliding seat (15) via a fixed seat (111), the tension roller (16) is rotatably disposed between the two fixed seats (111), and the cleaning cloth (31) passes around the tension roller (16) and is tensioned by the tension roller (16).

10. The wiping device for the coating die head according to claim 9, characterized in that, The front end of the wiping component (112) is also provided with an abutment surface (1124), which is connected to the wiping surface (1123) and located below the wiping surface (1123). The abutment surface (1124) extends out of the front end of the fixing seat (111). When the abutment surfaces (1124) of the two wiping components (112) abut against each other, the two fixing seats (111) are spaced apart from the tension roller (16).

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