Erasing device and coating apparatus

Abstract

The application provides a kind of erasing device and coating equipment, and the erasing device includes: mounting bracket;Erase roll, connected to mounting bracket;Erase object, tensioned and transported to the upper part of erase roll.After the roll coating of sheet material is completed, the sheet material moves through the upper part of erase roll, and the erase object at erase roll can erase and absorb the coating liquid remaining at the end of sheet material, ensure the uniformity and consistency of the coating layer of sheet material, reduce the formation of uneven perovskite layer, improve the photoelectric conversion efficiency of battery sheet, and further improve the overall performance and reliability of battery sheet, and avoid the risk of internal short circuit of battery sheet caused by residual coating liquid forming conductive path, improve the working life and working stability of battery sheet.

Description

[0001] Cross-references to related applications This application claims priority to Chinese Patent Application No. 202510957764.8, filed on July 10, 2025, entitled “Coating Equipment and Control Method”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery cell processing technology, and in particular to a wiping device and a coating equipment. Background Technology

[0003] Currently, perovskite materials have become a hot topic in solar cell research due to their high absorption coefficient, solution-processability, and adjustable bandgap. Perovskite solar cells can be prepared using solution methods. The coating process for perovskite solar cells typically involves multiple steps, such as the preparation of the precursor coating solution, coating, and annealing. Precise control of these steps is crucial to cell performance. However, during the coating process of perovskite solar cells, coating solution residue may remain at the ends of the cells, affecting the overall performance of the cells. Utility Model Content

[0004] In view of the above, it is necessary to provide a wiping device and a coating equipment that can improve the overall performance of the solar cells.

[0005] The first aspect of this application provides a wiping device, comprising: a mounting frame; a wiping roller connected to the mounting frame; and a wiping material tensioned and conveyed to the upper part of the wiping roller. When a sheet material passes over the upper part of the wiping roller in a first direction, the wiping material tensioned to the wiping roller wipes away the coating liquid on the bottom surface of the sheet material.

[0006] With the wiping device and coating equipment provided in this application, after the sheet material is coated by roller, the sheet material moves over the wiping roller. The wiping material at the wiping roller can wipe away and absorb the residual coating liquid at the end of the sheet material, ensuring the uniformity and consistency of the coating layer of the sheet material, reducing the formation of uneven perovskite layers, improving the photoelectric conversion efficiency of the solar cell, thereby improving the overall performance and reliability of the solar cell, and avoiding the risk of residual coating liquid forming a conductive path that causes a short circuit inside the solar cell, thus improving the working life and working stability of the solar cell. Attached Figure Description

[0007] Figure 1 A schematic diagram of the coating equipment provided in this application.

[0008] Figure 2 A schematic diagram of the coating equipment provided in this application in its working state.

[0009] Figure 3A schematic diagram showing the conveying direction of the sheet material provided in this application.

[0010] Figure 4 This is a schematic diagram of the structure of the roller coating device, adjusting device, and wiping device provided in this application.

[0011] Figure 5 A side view of the erasing device provided in this application.

[0012] Figure 6 A schematic diagram showing the state of the sheet material provided in this application passing above the wiping device.

[0013] Figure 7 A top view of the erasing device provided in this application.

[0014] Figure 8 A perspective view of the erasing device provided in this application.

[0015] Figure 9 A schematic diagram illustrating the working principle of the height fine-tuning component provided in this application.

[0016] Figure 10 A schematic diagram illustrating the working principle of the tension adjustment component provided in this application.

[0017] Figure 11 This is a schematic diagram of the roller coating apparatus provided in this application.

[0018] Figure 12 A side view of the roller coating apparatus provided in this application.

[0019] Figure 13 This is a schematic diagram showing the state of the testing device provided in this application when testing sheet materials.

[0020] Figure 14 This is a schematic diagram showing the distribution of sub-regions of the sheet material provided in this application.

[0021] Figure 15 A schematic diagram showing the distribution of detection points for the sheet material provided in this application.

[0022] Figure 16 A comparison diagram of the tilt curve of the sheet material provided in this application and the tilt curve of the coating roller tangent.

[0023] Explanation of main component symbols 100. Coating equipment; 10. Frame; 11. Feeding platform; 12. Unloading platform; 20. Detection device; 21. Fixed base; 22. Distance measuring component; 221. First measuring component; 222. Second measuring component; 30. Adjusting device; 31. Height adjusting component; 311. First height adjusting component; 312. Second height adjusting component; 313. Slide rail; 314. Adjusting base; 40. Roller coating device; 41. Coating roller; 42. Support frame; 43. Roller coating motor; 44. Doctor blade; 45. Liquid storage container; 451. Liquid inlet; 452. Liquid outlet; 46. Adjusting component; 50. Wiping device; 51. Mounting frame; 511. Base plate; 512. Support block; 5121. Adjusting hole; 51 22. Threaded hole; 5123. Locking hole; 5124. Sliding hole; 513. Mounting plate; 514. Mounting platform; 515. Damping component; 52. Erasing motor; 521. Coupling; 53. Drive roller; 531. Take-up roller; 54. Linkage roller; 541. Unwind roller; 542. Erasing roller; 55. Erased material; 56. Tensioning roller; 57. Height fine-tuning assembly; 571. Lifting adjustment component; 572. Limit adjustment component; 58. Tensioning adjustment component; 59. Support cylinder; 60. Gripping device; 61. Support base; 62. Suction cup assembly; 70. Drive device; 71. Lateral drive assembly; 72. Vertical drive assembly; 200. Sheet material; 201. Coated surface; 202. First end; 203. Last end. Detailed Implementation

[0024] In the description of the embodiments of this application, when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an element centrally located simultaneously. When an element is considered to be "set" on another element, it can be directly set on the other element or there may be an element centrally located simultaneously. In this application, unless otherwise expressly specified and limited, the terms "installed," "connected," "attached," "fixed," etc., should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances. The directional descriptions in this embodiment, such as "up," "down," "top," "bottom," etc., are all based on the direction of the product in the actual use scenario.

[0025] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] In related technologies, perovskite solar cell silicon wafers require a roll coating process. During this process, a coating roller coated with a coating solution is brought into contact with the side of the silicon wafer to be coated, and the silicon wafer and the coating roller move relative to each other along the coating direction (perpendicular to the roller's direction) to coat the surface of the silicon wafer with the coating solution. For example, the tangent direction of the coating roller is parallel to the horizontal direction, and the silicon wafer is parallel to the horizontal direction as a whole, allowing the silicon wafer to move relative to and contact the coating roller along the horizontal direction.

[0027] However, after the silicon wafer undergoes roll coating, residual coating liquid may remain on the bottom surface of the wafer. This residual coating liquid is called tail liquid. If it is not wiped away in time, it may cause the following problems: 1. Performance degradation: Residual coating liquid will form an uneven perovskite layer, leading to a decrease in the photoelectric conversion efficiency of the solar cell and affecting the overall performance; 2. Short circuit risk: Residual coating liquid may form a conductive path, increasing the risk of internal short circuits in the solar cell and affecting the stability and lifespan of the cell; 3. Contamination: Residual coating liquid may react with other materials to produce contaminants, affecting the purity and stability of the solar cell; 4. Process impact: Residual coating liquid may cause problems in subsequent process steps (such as heat treatment, encapsulation, etc.), affecting the final quality of the solar cell.

[0028] Therefore, embodiments of this application provide a wiping device and a coating equipment that can ensure the removal of coating liquid from the battery cells, thereby guaranteeing the overall performance and operational stability of the battery cells.

[0029] like Figures 1 to 3 As shown, this application first provides an erasing device 50, which is applied to a coating equipment 100. The coating equipment 100 is used to roll-coat a sheet material 200, which can be a raw material for perovskite solar cells. In the example of this application, the sheet material 200 is a silicon wafer, which is rectangular and has two sides. The side of the sheet material 200 that is actually roll-coated is defined as the coating surface 201. In this embodiment, the bottom surface of the sheet material 200 is the coating surface 201.

[0030] For example, the coating equipment 100 includes a frame 10, a roller coating device 40, and a wiping device 50. Both the roller coating device 40 and the wiping device 50 are disposed on the frame 10 and are spaced apart along a first direction. When the sheet material 200 moves along the first direction (the X direction in the figure) over the roller coating device 40, the roller coating device 40 coats the bottom surface of the sheet material 200. When the sheet material 200 moves along the first direction over the wiping device 50, the wiping device 50 wipes away the coating liquid from the bottom surface of the sheet material 200. The first direction can be parallel or perpendicular to the main grid lines of the sheet material 200, and the first direction is parallel to the horizontal direction.

[0031] Please refer to the following: Figure 4 and Figure 5 It is understandable that in the actual roll coating process, the sheet material 200 needs to move along the first direction and pass over the roll coating device 40 and the wiping device 50 in sequence. First, the roll coating device 40 rolls the coating liquid onto the coating surface 201 of the sheet material 200, and then the wiping device 50 wipes away the residual coating liquid at the ends of the sheet material 200 to avoid the coating liquid affecting the thickness of the coating layer formed on the sheet material 200. The ends of the sheet material 200 include a beginning end 202 and an end end 203, which are the two ends of the sheet material 200 in the first direction, located at the beginning and end positions of the roll coating device 40 on the sheet material 200, respectively.

[0032] Please refer to the following: Figure 6 and Figure 7 In this embodiment, the wiping device 50 includes a mounting frame 51, a wiping roller 542, and a wiping material 55. The mounting frame 51 is fixed to the frame 10, and the wiping roller 542 is connected to the mounting frame 51. The wiping material 55 is a roll-up, dust-free paper, which is tensioned and conveyed to the upper part of the wiping roller 542. When the sheet material 200 passes over the upper part of the wiping roller 542 along a first direction, the wiping material 55 located on the wiping roller 542 wipes away the coating liquid on the bottom surface of the sheet material 200.

[0033] Understandably, after the sheet material 200 completes the roll coating, the sheet material 200 moves over the wiping roller 542. During this process, the first end 202 and the last end 203 of the sheet material 200 pass through the wiping roller 542 in sequence. The wiping material 55 at the wiping roller 542 can wipe away and absorb the coating liquid remaining at the end of the sheet material 200, transferring the coating liquid to the wiping material 55, so that the surface of the sheet material 200 is uniformly coated, ensuring the uniformity and consistency of the coating layer of the sheet material 200, reducing the formation of uneven perovskite layers, improving the photoelectric conversion efficiency of the solar cell, thereby improving the overall performance and reliability of the solar cell, and avoiding the risk of residual coating liquid forming a conductive path that causes a short circuit inside the solar cell, thus improving the working life and working stability of the solar cell.

[0034] Meanwhile, wiping off the coating solution reduces subsequent cleaning and processing steps, simplifies the entire production process, lowers the production cost of perovskite solar cells, and prevents the coating solution from reacting with other materials to generate contaminants, thus improving the purity of the solar cells. It also avoids the coating solution affecting subsequent process steps (such as heat treatment and encapsulation). Furthermore, the coating solution absorbed on the wiping material 55 can be recycled and reused, reducing waste of the solution, lowering raw material costs, and meeting environmental protection requirements, thus contributing to green production.

[0035] In some embodiments, the erasing device 50 further includes an erasing motor 52, a take-up roller 531, and an unwind roller 541. The erasing motor 52 is mounted on the mounting frame 51. The take-up roller 531, the unwind roller 541, and the erasing roller 542 are all parallel to a second direction (the Y direction in the figure), which is perpendicular to the first direction and parallel to the horizontal direction. The take-up roller 531 is rotatably connected to the mounting frame 51 and connected to the erasing motor 52. The unwind roller 541 is rotatably connected to the mounting frame 51.

[0036] The wiping material 55 is tensioned and conveyed to the take-up roller 531, the unwind roller 541, and the wiping roller 542. One end of the wiping material 55 is wound around the take-up roller 531, and the other end of the wiping material 55 passes over the upper part of the wiping roller 542 and is wound around the unwind roller 541. Thus, both ends of the wiping material 55 are wound around the take-up roller 531 and the unwind roller 541, respectively, and the middle part of the wiping material 55 passes over the upper part of the wiping roller 542. The wiping roller 542 is positioned higher than the take-up roller 531 and the unwind roller 541, and the height of the wiping roller 542 is set based on the path through which the sheet material 200 moves.

[0037] Specifically, the wiping material 55 that has not been used to wipe the sheet material 200 (unused wiping material 55) is wound onto the unwinding roller 541 via a reel. After the single roll of wiping material 55 on the unwinding roller 541 is used up, a new wiping material 55 can be placed at the unwinding roller 541. In actual operation, the wiping motor 52 drives the take-up roller 531 to rotate to wind up the wiping material 55, and the wiping material 55 drives the unwinding roller 541 to rotate, and causes the wiping material 55 to pass through the wiping roller 542. The wiping material 55 that has been used to wipe the sheet material 200 (used wiping material 55) is wound onto the take-up roller 531 via a reel. After the take-up roller 531 is full of wiping material 55, the wiping material 55 at the take-up roller 531 can be removed and recycled. By continuously tensioning and conveying the wiping material 55 using the unwinding roller 541, wiping roller 542, and rewinding roller 531, unused wiping material 55 can be continuously supplied to the wiping roller 542 to improve the wiping cleanliness.

[0038] In some embodiments, the erasing device 50 further includes a tension roller 56 connected to the mounting frame 51. The tension roller 56, take-up roller 531, and unwind roller 541 are spaced apart. The material to be erased 55 at the erasing roller 542 passes through the tension roller 56 and enters the take-up roller 531, so that the take-up roller 531, unwind roller 541, erasing roller 542, and tension roller 56 work together to tension the material to be erased 55. The tension roller 56 can enhance the tensioning effect on the material to be erased 55. In the example of this application, the number of tension rollers 56 is 1. In other embodiments, the number of tension rollers 56 can be increased or decreased according to actual needs.

[0039] Please refer to the following: Figure 7 It can be understood that by driving the take-up roller 531 to rotate via the erasing motor 52, the unwind roller 541, erasing roller 542, and tension roller 56 can be driven to rotate via the erasing material 55. Thus, the take-up roller 531 forms the active roller 53, and the unwind roller 541 and erasing roller 542 both form the linked rollers 54. That is, the erasing device 50 can also be considered to include a mounting frame 51, an erasing motor 52, an active roller 53, a linked roller 54, and an erasing material 55. The mounting frame 51 is fixed to the machine frame 10. The active roller 53 is rotatably connected to the mounting frame 51, with its axial direction parallel to a second direction and the second direction perpendicular to the first direction. The erasing motor 52 is mounted on the mounting frame 51 and connected to the active roller 53; the linked roller 54 is rotatably connected to the mounting frame 51, with its axial direction perpendicular to the first direction. The erasing material 55 is tensioned between the active roller 53 and the linked roller 54. When the drive roller 53 and the linkage roller 54 work together to tension and convey the wiping material 55, the sheet material 200 moves along the first direction past the wiping roller 542 and the upper part of the wiping material 55, so that the wiping material 55 wipes away the coating liquid remaining on the sheet material 200.

[0040] In some embodiments, the mounting frame 51 includes a base plate 511, support blocks 512, and a mounting plate 513. The base plate 511 is fixed to the frame 10, and the mounting plate 513 and support blocks 512 are spaced apart along a second direction and fixed to the base plate 511. The support blocks 512 are arranged in pairs, and the two support blocks 512 cooperate to support the take-up roller 531, the unwind roller 541, the wiping roller 542, and the tension roller 56.

[0041] Specifically, the take-up roller 531 is detachably disposed between two support blocks 512, and both ends of the take-up roller 531 are rotatably connected to the two support blocks 512 via rotating bearings. The end of the take-up roller 531 near the mounting plate 513 passes through the support block 512. The erasing motor 52 is fixed to the mounting plate 513, and the output shaft of the erasing motor 52 passes through the mounting plate 513 and is connected to one end of the take-up roller 531 via a coupling 521. In this way, the erasing motor 52 can directly drive the take-up roller 531 to rotate.

[0042] The unwinding roller 541 is located on the side of the take-up roller 531 away from the roller coating device 40, and the take-up roller 531 and the unwinding roller 541 are at the same height. The unwinding roller 541 is detachably mounted between two support blocks 512, and both ends of the unwinding roller 541 are rotatably connected to the two support blocks 512 via rotating bearings. A damping element 515 is provided between the unwinding roller 541 and the mounting frame 51. The damping element 515 can be a magnetic damper, which can increase the rotational damping of the unwinding roller 541 when it rotates, limit the rotational speed of the unwinding roller 541 to achieve a buffering effect, and ensure that the wiping material 55 can be transported smoothly.

[0043] The wiping roller 542 is located above the take-up roller 531 and is positioned between two support blocks 512. Support cylinders 59 are provided at both ends of the wiping roller 542, and the two support cylinders 59 are rotatably connected to both ends of the wiping roller 542. The two support cylinders 59 are correspondingly positioned to the two support blocks 512, and each support cylinder 59 is connected to its corresponding support block 512. Thus, the support blocks 512 provide support and rotatable connection to the wiping roller 542 through the support cylinders 59.

[0044] In some embodiments, the mounting bracket 51 is provided with height fine-tuning components 57 at both ends of the wiping roller 542. The height fine-tuning components 57 are connected to the ends of the wiping roller 542 and are used to adjust the height of the wiping roller 542.

[0045] Two sets of height fine-tuning components 57 are correspondingly arranged with two support blocks 512. The two sets of height fine-tuning components 57 are respectively set on the corresponding support blocks 512 and connected to the support cylinder 59. The height fine-tuning components 57 can adjust the position of the support cylinder 59 relative to the support blocks 512 in the vertical direction, thereby adjusting the height of one end of the wiping roller 542 connected to the support cylinder 59, and thus changing the overall height or tilt of the wiping roller 542. This allows the user to easily adjust the height or posture of the wiping roller 542, making it flexible for different application scenarios. For example, regarding height, it avoids situations where the wiping roller 542 is too high and obstructs the movement of the sheet material 200, or too low and fails to clean the coating. Regarding tilt, the wiping roller 542 can be leveled by adjusting the height of its two ends, or adjusted to a posture suitable for wiping the sheet material 200, ensuring effective wiping.

[0046] Please refer to the following: Figure 8 and Figure 9 Specifically, the mounting bracket 51 has an adjustment hole 5121, and the support cylinder 59 passes through the adjustment hole 5121, which extends in the vertical direction (Z direction in the figure). For example, the cross-section of the support cylinder 59 in the second direction is rectangular, and the support cylinder 59 forms limiting surfaces on opposite sides in the first direction, with the limiting surfaces parallel to the vertical direction.

[0047] For example, an adjustment hole 5121 is formed in the support block 512. The adjustment hole 5121 is an oblong hole extending in the vertical direction. The width of the adjustment hole 5121 is adapted to the width of the support cylinder 59, so that the two side walls of the adjustment hole 5121 respectively fit against the opposite sides of the support cylinder 59 in the first direction. In this way, the adjustment hole 5121 has a limiting effect on the movement of the support cylinder 59, ensuring that the support cylinder 59 moves in the vertical direction under the action of the height fine-tuning component 57, and avoiding deviation of the support cylinder 59 that would affect the posture of the wiping roller 542.

[0048] Specifically, the height fine-tuning assembly 57 includes a lifting adjustment member 571. The lifting adjustment member 571 is movably disposed in the mounting frame 51 in the vertical direction and abuts against the bottom surface of the support cylinder 59.

[0049] For example, a mounting platform 514 is provided on the side of the support block 512 away from the wiping roller 542, and the mounting platform 514 is located below the corresponding support cylinder 59. The lifting adjustment member 571 is a micro-head, which has an operating end and a movable end. The micro-head is fixed to the mounting platform 514, and the movable end of the mounting platform 514 passes through the mounting platform 514 upward and abuts against the bottom surface of the support cylinder 59. The movable end of the micro-head supports the support cylinder 59, and the user can move the movable end back and forth by turning the operating end to drive the support cylinder 59 to rise or fall. In this way, the height of the support cylinder 59 can be changed, thereby adjusting the height of the corresponding end of the wiping roller 542.

[0050] Specifically, the height fine-tuning component 57 includes a limiting adjustment member 572, which is movably disposed vertically on the mounting bracket 51 and abuts against the top surface of the support cylinder 59. The limiting adjustment member 572 is a limiting screw. The top of the support block 512 has a threaded hole 5122, which communicates with the adjustment hole 5121. The screw of the limiting screw is threaded into the threaded hole 5122, so that the screw of the limiting screw passes through the threaded hole 5122 and enters the adjustment hole 5121, abutting against the top surface of the support cylinder 59.

[0051] When it is necessary to adjust the height of one end of the wiping roller 542, the corresponding limit adjustment piece 572 can be loosened first to provide space for the support cylinder 59 to move up and down. Then, the corresponding lifting adjustment piece 571 can be adjusted to keep the support cylinder 59 at the specified height. Finally, the corresponding limit adjustment piece 572 can be tightened to fix the support cylinder 59.

[0052] Understandably, the limit adjustment component 572, together with the lifting adjustment component 571, abuts against the upper and lower sides of the support cylinder 59 respectively, forming a pre-tightening force to firmly position the support cylinder 59 on the support block 512. With the adjustment hole 5121 limiting the two sides of the support cylinder 59, it can prevent the support cylinder 59 from deviating or shaking during operation, thus improving working stability.

[0053] Please refer to the following: Figure 10 In some embodiments, the mounting frame 51 is provided with tension adjusting members 58 at both ends of the tension roller 56. The tension adjusting members 58 are connected to the ends of the tension roller 56 and are used to adjust the height of the tension roller 56. Two sets of tension adjusting members 58 are correspondingly arranged with two support blocks 512, and are respectively disposed on the corresponding support blocks 512 and connected to the ends of the tension roller 56. By adjusting the height of the ends of the tension roller 56, the tension adjusting members 58 change the overall height or inclination of the tension roller 56, thereby adjusting the tension of the tension roller 56 on the object to be wiped 55, which is beneficial for the smooth transport and handling of the object to be wiped 55.

[0054] For example, the support block 512 has a sliding hole 5124 that extends vertically. Connecting rods are provided at both ends of the tension roller 56, and these connecting rods pass through the sliding holes 5124 adjacent to the support block 512. A locking hole 5123 is provided at the top of the support block 512, communicating with the sliding hole 5124. The inner wall of the locking hole 5123 has an internal thread. The tension adjusting member 58 is a locking screw, the screw threaded into the locking hole 5123, allowing the screw to pass through the locking hole 5123 and enter the sliding hole 5124. The wiping material 55 passes through the bottom of the tension roller 56, providing upward support to the tension roller 56, causing the connecting rod to press against the screw. Users can move the screw of the locking screw back and forth in the sliding hole 5124 by turning the locking screw, thereby changing the maximum height of the connecting rod. The connecting rod can be raised or lowered by the support of the wiping material 55, thereby adjusting the height and tension of the tension roller 56.

[0055] like Figures 1 to 10 As shown, this application also provides a coating apparatus 100.

[0056] The coating equipment 100 includes a roller coating device 40, a wiping device 50, a frame 10, a detection device 20, a gripping device 60, a drive device 70, a loading platform 11, and a unloading platform 12. The detection device 20, roller coating device 40, wiping device 50, drive device 70, loading platform 11, and unloading platform 12 are all mounted on the frame 10. The loading platform 11, detection device 20, roller coating device 40, wiping device 50, and unloading platform 12 are sequentially distributed along a first direction. The detection device 20 is used to detect the flatness of the bottom surface of the sheet material 200. The gripping device 60 is used to grip or release the sheet material 200. The drive device 70 is connected to the gripping device 60 and is used to drive the gripping device 60 to move.

[0057] In the actual coating process, the gripping device 60 grips the sheet material 200. Driven by the driving device 70, the gripping device 60 moves the sheet material 200 sequentially along the first direction through the detection device 20, the roller coating device 40, and the wiping device 50. When the sheet material 200 moves along the first direction over the detection device 20, the detection device 20 detects the flatness of the bottom surface of the sheet material 200. When the sheet material 200 moves along the first direction over the roller coating device 40, the roller coating device 40 performs roller coating on the sheet material 200. When the sheet material 200 moves along the first direction over the wiping device 50, the roller coating device 40 wipes away any residual coating liquid from the sheet material 200.

[0058] Please refer to the following: Figure 11 and Figure 12In this embodiment, the roller coating apparatus 40 includes a support frame 42, a roller coating motor 43, a coating roller 41, a doctor blade 44, and a liquid storage container 45. The coating roller 41 is rotatably connected to the support frame 42, and the roller coating motor 43 is disposed on the support frame 42 and connected to the coating roller 41. When the sheet material 200 moves along the first direction and passes over the coating roller 41, the coating roller 41 contacts the sheet material 200. The axial direction of the coating roller 41 is parallel to the second direction, and the second direction is perpendicular to the first direction. The liquid storage container 45 is located below the coating roller 41 and has a liquid storage tank inside. The liquid storage tank contains coating liquid and has an inlet 451 and an outlet 452. The coating liquid can enter the liquid storage tank through the inlet 451 and be discharged through the outlet 452, realizing the circulation and replacement of the coating liquid. The upper part of the coating roller 41 is exposed outside the support frame 42, and the lower part of the coating roller 41 is immersed in the coating liquid.

[0059] The doctor blade 44 is connected to the support frame 42 via an adjusting component 46. The doctor blade 44 is located on one side of the coating roller 41, and its height is lower than the upper part of the coating roller 41. The roller coating motor 43 drives the coating roller 41 to rotate. When the coating roller 41 rotates, it draws the coating liquid in the liquid storage container 45 to its periphery, while the doctor blade 44 scrapes off excess coating liquid from the coating roller 41. The distance between the doctor blade 44 and the coating roller 41 can be increased or decreased by the adjusting component 46 to adjust the amount of coating liquid adhering to the coating roller 41.

[0060] When the sheet material 200 is roller coated, the roller coating motor 43 drives the coating roller 41 to rotate, and the coating liquid is attached to the periphery of the coating roller 41 from the liquid storage container 45. The gripping device 60 grips the sheet material 200 and moves the sheet material 200 along the first direction past the upper part of the coating roller 41 so that the bottom surface of the sheet material 200 comes into contact with the coating roller 41 to achieve roller coating.

[0061] In this embodiment, the coating equipment 100 further includes an adjustment device 30, which is disposed on the frame 10 and connected to the support frame 42. The adjustment device 30 adjusts the inclination of the support frame 42 so that the height of the two ends of the coating roller 41 forms a height difference.

[0062] Thus, the tilt of the coating roller 41 can be changed by adjusting the device 30, so that the coating roller 41 is not only suitable for roller coating on the coating surface 201 parallel to the horizontal plane, but also suitable for roller coating on the coating surface 201 with tilt or unevenness, making the working mode more flexible.

[0063] Specifically, the adjusting device 30 includes multiple height adjusting elements 31, which are spaced apart along the second direction. The frame 10 is provided with an adjusting base 314, and the multiple height adjusting elements 31 are fixed to the adjusting base 314. The multiple height adjusting elements 31 are used to adjust the height of both ends of the support frame 42, thereby changing the height of both ends of the coating roller 41, so as to form a height difference between the two ends of the coating roller 41, and realize the tilt adjustment of the roller coating device 40.

[0064] For example, the height adjustment component 31 has two parts: a first height adjustment component 311 and a second height adjustment component 312. The first height adjustment component 311 and the second height adjustment component 312 are respectively disposed on the bottom surface of both ends of the support frame 42. The height adjustment component 31 adopts a voice coil motor. The main body of the voice coil motor is fixed to the frame 10, and the movable end of the voice coil motor is connected to the support frame 42. In response to the received control command, the voice coil motor raises or lowers the end of the support frame 42, thereby raising or lowering the end of the coating roller 41. A slide rail 313 is provided between the movable end of the voice coil motor and the support frame 42. The slide rail 313 guides and limits the displacement between the movable end of the voice coil motor and the support frame 42 in the vertical direction to ensure the stability of the raising or lowering of the end of the roller coating device 40.

[0065] It is understood that voice coil motors have the characteristics of high precision and rapid response, which can reduce the error of tilt adjustment and match the high-speed cycle of the production line to meet the corresponding process requirements. It is worth noting that the height range that needs to be adjusted at the end of the roller coating device 40 in this embodiment is small (e.g., ±5mm). Therefore, no rotating connection structure such as a ball joint is provided at the connection between the voice coil motor and the roller coating device 40, or at the connection between the voice coil motor and the frame 10. The tilt of the roller coating device 40 can still be adjusted by translating the movable end of the voice coil motor without mechanical interference. In other embodiments, if the height range that needs to be adjusted for the roller coating device 40 is large, rotating connection structures such as ball joints can be configured at the connection between the voice coil motor and the roller coating device 40, or at the connection between the voice coil motor and the frame 10. This application does not impose any restrictions on this.

[0066] On the other hand, by adjusting the height of both ends of the roller coating device 40 by adjusting the tilt by two height adjustment components 31, the influence of tilt adjustment on the overall height of the roller coating device 40 can be reduced, and the influence of tilt adjustment on the overall height of the coating roller 41 can be reduced. The coating roller 41 is maintained at the preset height by the two height adjustment components 31, which is more conducive to the precise control of the position of the coating roller 41.

[0067] It is understood that the adjustment device 30 in this application adopts a combination of multiple voice coil motors. In other embodiments, the adjustment device 30 can also be an adjustment platform or other mechanism, as long as it can achieve the effect of adjusting the tilt of the roller coating device 40. This application does not impose any restrictions on this.

[0068] Please refer to the following: Figure 13 Specifically, the detection device 20 includes a fixed base 21 and multiple distance measuring components 22. The fixed base 21 is disposed on the frame 10, and the multiple distance measuring components 22 are spaced apart along the second direction and fixed to the fixed base 21. The fixed base 21 is provided with a leveling component, which can be used to level the fixed base 21 so that the height of the multiple distance measuring components 22 is consistent.

[0069] As the sheet material 200 moves above the plurality of distance measuring components 22, the distance measuring components 22 project vertically onto the bottom surface of the sheet material 200, forming detection points. The distance measuring components 22 are used to measure the distance between themselves and their corresponding detection points. Specifically, when the gripping device 60 moves the sheet material 200 along a first direction above the plurality of distance measuring components 22, each distance measuring component 22 detects its own distance to its corresponding detection point. The thickness at each detection point can be calculated by measuring the distance at each detection point.

[0070] For example, the distance measurement component 22 employs a laser measurement module. When the sheet material 200 passes directly above the laser measurement module, the laser measurement module instantly obtains the distance from the surface of the laser measurement module to the detection point using triangulation.

[0071] It is understandable that the distance between the measuring component 22 and the detection point can actually reflect the thickness of the sheet material 200. When the side of the sheet material 200 facing away from the coating surface 201 is adsorbed by the gripping device 60, the thickness of the sheet material 200 at the detection point can reflect the flatness of the bottom surface of the sheet material 200.

[0072] Specifically, the drive unit 70 includes a lateral drive assembly 71 and a vertical drive assembly 72. The gripping device 60 is connected to the vertical drive assembly 72, and the vertical drive assembly 72 is connected to the lateral drive assembly 71. The lateral drive assembly 71 drives the gripping device 60 to move along a first direction, and the vertical drive assembly 72 drives the gripping device 60 to move along a vertical direction. For example, the lateral drive assembly 71 can be a gantry-type lateral movement mechanism, and the vertical drive assembly 72 can be a cylinder mechanism.

[0073] It is understood that the loading platform 11, the detection device 20, the roller coating device 40, the wiping device 50, and the unloading platform 12 are distributed at intervals along the first direction. The lateral drive assembly 71 drives the gripping device 60 to move along the first direction, which can enable the gripping device 60 to move directly to the loading platform 11, the detection device 20, the roller coating device 40, the wiping device 50, or the unloading platform 12, thereby improving the movement efficiency.

[0074] The gripping device 60 includes a support base 61 and a suction cup assembly 62. The support base 61 is connected to a vertical drive assembly 72, and the suction cup assembly 62 is connected to the support base 61. The lateral drive assembly 71 can drive the vertical drive assembly 72 to move along a first direction, thereby moving the support base 61 and the suction cup assembly 62 along the first direction. The vertical drive assembly 72 can drive the support base 61 to move vertically, thereby moving the suction cup assembly 62 vertically.

[0075] For example, the suction cup assembly 62 is an alumina ceramic suction cup. The suction cup assembly 62 is connected to a vacuum pumping device and a vacuum breaking device, which change the gripping or releasing state of the suction cup assembly 62 in response to receiving a control command.

[0076] For example, the suction cup assembly 62 is fixed to the bottom surface of the support base 61. When it is necessary to grasp the sheet material 200, the suction cup assembly 62 moves to the top of the sheet material 200 and adheres to it. Then, the suction cup assembly 62 switches to the grasping state, and the suction cup assembly 62 adsorbs the sheet material 200 by negative pressure. When it is necessary to release the sheet material 200, the suction cup assembly 62 switches to the releasing state, the suction cup assembly 62 loses the negative pressure and releases the sheet material 200.

[0077] Specifically, the loading platform 11 is used to place the sheet material 200 to be roller-coated. The coating equipment 100 is connected to the loading equipment via the loading platform 11. The loading equipment places the sheet material 200 to be roller-coated on the loading platform 11 so that the sheet material 200 can enter the subsequent roller coating process. For example, the loading platform 11 is located on the side of the detection device 20 away from the roller coating device 40, and the upper surface of the loading platform 11 is provided with a loading positioning component. When the sheet material 200 is placed on the loading platform 11, the loading platform 11 positions and aligns the sheet material 200 through the loading positioning component so that the sheet material 200 is held in a specified posture for the gripping device 60 to pick up.

[0078] Specifically, the unloading platform 12 is used to place the roll-coated sheet material 200. The coating equipment 100 is connected to the unloading equipment via the unloading platform 12. After the sheet material 200 has completed roll coating, it is placed on the unloading platform 12, and the unloading equipment removes it from the platform for storage or to the next process. For example, the unloading platform 12 is located on the side of the wiping device 50 away from the roll coating device 40, and its upper surface is provided with an unloading positioning component. When the sheet material 200 is placed on the unloading platform 12, the unloading platform 12 positions and aligns it using the unloading positioning component, ensuring the sheet material 200 maintains a specified posture for removal by the unloading equipment.

[0079] It is worth noting that the tilt adjustment function of the adjustment device 30 in the roller coating apparatus 40 of this application can not only be adjusted before the sheet material 200 is roller coated, but also during the roller coating process of the sheet material 200. For example, the adjustment device 30 can dynamically adjust the tilt of the coating roller 41 according to the flatness of the bottom surface of the sheet material 200, so as to ensure that the coating roller 41 can make large-area contact with the bottom surface of the sheet material 200 and achieve a better coating effect.

[0080] Specifically, the coating equipment 100 also includes a control device, and a detection device 20 is electrically connected to the control device. The detection device 20 is used to detect the control device and send the detection results to the control device for processing. An adjustment device 30 is electrically connected to the control device and is used to adjust the tilt of the roller coating device 40 in response to the control signal sent by the control device, thereby adjusting the axial direction of the coating roller 41. In this embodiment, without adjustment, the axial direction of the coating roller 41 is parallel to the horizontal direction and perpendicular to the first direction; after adjustment, the axial direction of the coating roller 41 forms an angle with the horizontal direction and is perpendicular to the first direction.

[0081] Specifically, the control device is used to acquire detection information from the detection device 20; based on the detection information of multiple detection points, it obtains the coating tilt amount of the corresponding coating surface 201; based on the coating tilt amount, it generates a control command and sends it to the adjustment device 30 to control the adjustment device 30 to adjust the tilt of the roller coating device 40 so that the axial direction of the coating roller 41 is parallel to the extension direction of the coating surface 201.

[0082] In this embodiment, the coating surface 201 of the sheet material 200 has multiple detection points, and the distribution direction of the multiple detection points is perpendicular to the first direction. The detection device 20 is used to detect the multiple detection points of the coating surface 201 to obtain detection information. The detection information is used to reflect the inclination of the coating surface 201 relative to the horizontal plane. The adjustment device 30 is used to adjust the inclination of the roller coating device 40 according to the detection information, so that the axial direction of the coating roller 41 is parallel to the extension direction of the coating surface 201.

[0083] For ease of understanding, the working process of the coating equipment 100 is described below as an example. The working process of the coating equipment 100 may include the following steps.

[0084] S101, The sheet material 200 to be roller coated is received through the feeding platform 11.

[0085] S102. Drive the gripping device 60 to move to the feeding platform 11 via the drive device 70, and grip the sheet material 200 via the gripping device 60.

[0086] S103. The gripping device 60 is moved by the driving device 70, causing the sheet material 200 to move past the detection device 20. The detection device 20 detects the sheet material 200 and obtains detection information.

[0087] S104. The gripping device 60 is moved by the driving device 70, so that the sheet material 200 moves through the roller coating device 40. During this process, the roller coating device 40 applies the coating liquid to the coating surface 201 of the sheet material 200 through the coating roller 41.

[0088] S105. The gripping device 60 is moved by the driving device 70, so that the sheet material 200 moves past the wiping device 50, so that the wiping device 50 wipes away the residual coating liquid on the sheet material 200. The adjusting device 30 adjusts the inclination of the roller coating device 40 so that the axial direction of the coating roller 41 is parallel to the extension direction of the coating surface 201.

[0089] S106. Drive the gripping device 60 to move to the unloading platform 12 via the drive device 70. Place the coated sheet material 200 on the unloading platform 12 via the gripping device 60 and wait for the unloading equipment to take away the sheet material 200.

[0090] It is understood that during the roll coating process of the coating roller 41 on the sheet material 200, the tangent on the periphery of the coating roller 41 contacts the coating surface 201 of the sheet material 200, and the tangent of the coating roller 41 is parallel to the axial direction of the coating roller 41. This application obtains detection information of the sheet material 200 through the detection device 20, and adjusts the inclination of the roll coating device 40 according to the detection information through the adjustment device 30, so that the axial direction of the coating roller 41 is parallel to the extension direction of the coating surface 201. During the process of the sheet material 200 passing through the coating roller 41, the tangent of the coating roller 41 is parallel to the coating surface 201 of the sheet material 200. Along the axial direction of the coating roller 41, different positions on the tangent of the coating roller 41 maintain good contact with the coating surface 201 of the sheet material 200, thereby improving the uniformity of the roll coating.

[0091] In this embodiment, the coating surface 201 is formed with multiple sub-regions along the first direction, and each sub-region has multiple detection points. Based on the detection information of the detection points corresponding to the sub-regions, the coating tilt amount corresponding to the sub-regions can be obtained.

[0092] As the sheet material 200 passes through the coating roller 41, multiple sub-regions sequentially pass through the coating roller 41. During this process, the adjusting device 30 continuously adjusts the inclination of the roller coating device 40 so that the axial direction of the coating roller 41 is parallel to the extension direction of the sub-region surface when each sub-region passes through the coating roller 41. In this way, good contact is maintained between different positions on the tangent of the coating roller 41 and the surface of the sub-region along the axial direction of the coating roller 41, thereby improving the overall uniformity of the roller coating of the sheet material 200.

[0093] For example, multiple detection points are divided into first points and second points, which are distributed on opposite sides of the sheet material 200. Correspondingly, multiple distance measuring components 22 are divided into a first measuring component 221 corresponding to the first point and a second measuring component 222 corresponding to the second point. When the sheet material 200 passes directly above the laser measuring module, the first point passes directly above the first measuring component 221, and the second point passes directly above the second measuring component 222. Thus, the detection information includes the first distance corresponding to the first point and the second distance corresponding to the second point. Based on the distance difference between the first and second distances, the corresponding coating tilt amount can be obtained.

[0094] When the sheet material 200 has multiple sub-regions, each sub-region has a corresponding first point and a second point. When the sheet material 200 passes directly above the laser measurement module, the first points of the multiple sub-regions pass directly above the first measurement component 221 in sequence, and the second points of the multiple sub-regions pass directly above the second measurement component 222 in sequence.

[0095] Thus, the detection information includes the first distance and the second distance corresponding to each sub-region. Based on the distance difference between the first distance and the second distance, the coating tilt amount corresponding to each sub-region can be obtained. In the actual detection process, it is only necessary to let the sheet material 200 pass over the distance measuring component 22 at a preset speed to obtain the measurement results corresponding to each set of detection points. The detection method is simple and fast, improving measurement efficiency.

[0096] It is worth noting that in this embodiment, the detection device 20 only detects the first and second detection points, and the coating tilt of the sub-region is actually the tilt of the line connecting the first and second points. In other embodiments, the detection device 20 may also detect multiple detection points and use the thickness values ​​corresponding to the multiple detection points to analyze the tilt of the sub-region. This application does not impose any restrictions on this.

[0097] It is understood that the sub-regions are intended to describe the detection area when the sheet material 200 passes through the detection device 20. The sub-regions themselves are not directly divided on the sheet material 200. The number and width of the sub-regions can be determined by the detection step size of the detection device 20 and the moving speed of the sheet material 200. For example, when high accuracy is required, the speed at which the sheet material 200 moves through the detection device 20 can be slowed down, or the time interval for data acquisition by the detection device 20 can be shortened, thereby obtaining denser and more numerous sub-regions and corresponding detection points. Conversely, when lower accuracy is required, the speed at which the sheet material 200 moves through the detection device 20 can be increased, or the time interval for data acquisition by the detection device 20 can be extended, thereby obtaining sparser and fewer sub-regions and corresponding detection points. This application does not impose any limitations on this.

[0098] This application also provides a control method applied to a coating apparatus 100. The control method can be executed by a control device of the coating apparatus 100. Specifically, the control device may include a processor and a memory, the memory storing executable instructions of the processor. The processor executes the executable instructions, causing the control device to implement the control method.

[0099] The control method specifically includes the following steps.

[0100] S201. Obtain detection information from the detection device 20. The detection information is obtained by the detection device 20 through multiple detection positioning detections. The detection information reflects the inclination of the coating surface 201 relative to the horizontal plane.

[0101] S202. Based on the detection information from multiple detection points, obtain the coating tilt amount of the corresponding coating surface 201. The coating tilt amount is used to reflect the inclination of the coating surface 201 relative to the horizontal plane.

[0102] S203. A control command is generated based on the coating surface tilt amount and sent to the adjustment device 30. The adjustment device 30 adjusts the tilt of the roller coating device 40 according to the control command, so that the axial direction of the coating roller 41 is parallel to the extension direction of the coating surface 201.

[0103] Thus, as the sheet material 200 passes through the coating roller 41, the tangent of the coating roller 41 is parallel to the coating surface 201 of the sheet material 200. Along the axial direction of the coating roller 41, different positions on the tangent of the coating roller 41 maintain good contact with the coating surface 201 of the sheet material 200, thereby improving the uniformity of roller coating.

[0104] In some embodiments, the coating surface 201 is formed with a plurality of sub-regions along a first direction, and each sub-region has a plurality of detection points.

[0105] Step S203 specifically includes: obtaining a tilt curve based on the coating tilt amount corresponding to each sub-region, generating a control command based on the tilt curve, and sending it to the adjustment device 30. The tilt curve includes the coating tilt amount corresponding to each sub-region. The adjustment device 30 adjusts the tilt of the roller coating device 40 according to the control command, so that the axial direction of the coating roller 41 is parallel to the extension direction of the sub-region passing through the coating roller 41.

[0106] Thus, as the sheet material 200 passes through the coating roller 41, multiple sub-regions will sequentially pass through the coating roller 41. During this process, the adjusting device 30 continuously adjusts the inclination of the roller coating device 40 so that when each sub-region passes through the coating roller 41, the axial direction of the coating roller 41 is parallel to the extension direction of the sub-region surface. In this way, along the axial direction of the coating roller 41, different positions on the tangent of the coating roller 41 maintain good contact with the surface of the sub-region, thereby improving the overall uniformity of the roller coating of the sheet material 200.

[0107] In the example of this application, multiple detection points are divided into first points and second points, which are distributed on opposite sides of the sheet material 200. Each sub-region has corresponding first and second points.

[0108] Correspondingly, the multiple distance measuring components 22 are divided into a first measuring component 221 corresponding to the first point and a second measuring component 222 corresponding to the second point. When the sheet material 200 passes directly above the laser measuring module, the first points of the multiple sub-regions pass directly above the first measuring component 221 in sequence, and the second points of the multiple sub-regions pass directly above the second measuring component 222 in sequence.

[0109] The detection information includes a first distance and a second distance corresponding to each sub-region. The first distance is the distance from the first measuring component 221 to the first point, and the second distance is the distance from the second measuring component 222 to the second point. The coating tilt amount is the difference between the first distance and the second distance.

[0110] For ease of understanding, the following example illustrates the tilt angle of the sheet material 200.

[0111] Please refer to the following: Figures 14 to 16 The sheet material 200 has n sub-regions along a first direction, namely: sub-regions Q1, Q2, Q3, ..., Qn. Each sub-region of the sheet material 200 corresponds to a first point A and a second point B. The first point A corresponding to sub-regions Q1, Q2, Q3, ..., Qn is: first point A1, A2, A3, ..., An. The second point B corresponding to sub-regions Q1, Q2, Q3, ..., Qn is: second point B1, B2, B3, ..., Bn.

[0112] In this context, the coating tilt amount for sub-region Q1 is the distance difference between the first distance of the first point A1 and the second distance of the second point A1. The coating tilt amount for sub-region Q2 is the distance difference between the first distance of the first point A2 and the second distance of the second point A2. The coating tilt amount for sub-region Q3 is the distance difference between the first distance of the first point A3 and the second distance of the second point A3. The coating tilt amount for sub-region Qn is the distance difference between the first distance of the first point An and the second distance of the second point An. Based on the coating tilt amounts corresponding to sub-regions Q1, Q2, Q3, ..., Qn, tilt amount curves can be generated.

[0113] Figure 16 The x-coordinate in the figure indicates the degree of inclination, and the y-coordinate in the figure indicates the stroke position of the sheet material 200 as it passes through the coating roller 41. Figure 16 The solid line L1 in the figure is the tilt curve of the sheet material 200, which reflects the tilt of the coating surface corresponding to each sub-region of the sheet material 200. The tilt of the coating surface is proportional to the tilt degree. The dashed line L2 in the figure is the tilt degree curve of the tangent of the coating roller 41, which reflects the tilt degree of the tangent of the coating roller 41 when it is not adjusted (i.e., the axial direction is parallel to the horizontal direction).

[0114] It is understood that during the process of the sheet material 200 passing through the coating roller 41, sub-regions Q1, Q2, Q3, ..., Qn will pass through the coating roller 41 in sequence. During this process, the adjusting device 30 continuously adjusts the inclination of the roller coating device 40 so that when the sub-regions Q1, Q2, Q3, ..., Qn pass through the coating roller 41, the axial direction of the coating roller 41 can be parallel to the extension direction of the surface of the sub-regions Q1, Q2, Q3, ..., Qn, ensuring that the tangent of the coating roller 41 maintains good contact with the surface of the sub-region, thereby improving the uniformity of roller coating.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. An erasing device, characterized in that, include: Mounting rack; Wiping roller, connected to the mounting bracket; The material to be wiped is tensioned and conveyed to the upper part of the wiping roller; As the sheet material passes over the top of the wiping roller in the first direction, the wiping material, which is tensioned on the wiping roller, wipes away the coating liquid on the bottom surface of the sheet material.

2. The erasing device according to claim 1, characterized in that, Also includes: Wipe the motor, which is mounted on the mounting bracket; A take-up roller is rotatably connected to the mounting frame and connected to the erasing motor; The unwinding roller is rotatably connected to the mounting frame; The wiping roller is positioned higher than the take-up roller and the unwind roller; The wiping material is tensioned and conveyed to the take-up roller, the unwind roller, and the wiping roller, wherein one end of the wiping material is wound around the take-up roller, and the other end of the wiping material passes over the upper part of the wiping roller and is wound around the unwind roller.

3. The erasing device according to claim 1, characterized in that, The mounting bracket is provided with height fine-tuning components at both ends of the wiping roller. The height fine-tuning components are connected to the ends of the wiping roller and are used to adjust the height of the wiping roller.

4. The erasing device according to claim 3, characterized in that, The end of the wiping roller is provided with a support cylinder, the mounting frame is provided with an adjustment hole, the support cylinder passes through the adjustment hole, and the adjustment hole extends in the vertical direction; The height fine-tuning component includes a lifting adjustment member, which is movably disposed in the mounting frame in the vertical direction and abuts against the bottom surface of the support cylinder.

5. The erasing device according to claim 4, characterized in that, The height fine-tuning component also includes a limiting adjustment member, which is movably disposed in the mounting frame in the vertical direction and abuts against the top surface of the support cylinder.

6. The erasing device according to claim 2, characterized in that, The wiping device further includes a tension roller connected to the mounting frame. The tension roller, the take-up roller, and the unwind roller are spaced apart. The take-up roller, the unwind roller, the wiping roller, and the tension roller work together to tension the wiping material.

7. The erasing device according to claim 6, characterized in that, The mounting frame is provided with tension adjustment components at both ends of the tension roller. The tension adjustment components are connected to the ends of the tension roller and are used to adjust the height of the tension roller.

8. A coating apparatus, characterized in that, The device includes a frame, a roller coating apparatus, and a wiping device as described in any one of claims 1 to 7, wherein both the roller coating apparatus and the wiping device are disposed on the frame; when the sheet material moves along the first direction and passes over the roller coating apparatus, the roller coating apparatus performs roller coating on the sheet material.

9. The coating equipment according to claim 8, characterized in that, The coating equipment further includes an adjustment device. The roller coating device includes a support frame, a roller coating motor, and a coating roller. The coating roller is rotatably connected to the support frame, and the roller coating motor is disposed on the support frame and connected to the coating roller. When the sheet material moves along the first direction and passes over the coating roller, the coating roller contacts the sheet material. The axial direction of the coating roller is parallel to the second direction, and the second direction is perpendicular to the first direction. The adjusting device is disposed on the frame and connected to the support frame. The adjusting device adjusts the inclination of the support frame so that the height of the two ends of the coating roller forms a height difference.

10. The coating equipment according to claim 8, characterized in that, The coating equipment also includes a detection device, and the detection device, the roller coating device, and the wiping device are distributed sequentially along the first direction. The detection device is used to detect the flatness of the bottom surface of the sheet material.

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