Coating equipment and mask device

Abstract

The present invention discloses a coating device and a mask device. The mask device is arranged at both ends of the coating head in the length direction. The mask device includes: a mounting bracket, a mask roller assembly and a cleaning assembly. The mask roller assembly includes a rotatable mask roller, which is arranged on the mounting bracket. The mask roller includes an outer peripheral surface, a first side surface and a second side surface. The outer peripheral surface of the mask roller is used to adhere the coating liquid extruded by the coating head. The cleaning assembly includes a plurality of nozzles and a plurality of scrapers. The nozzles are used to spray cleaning liquid on the mask roller, and the scrapers are used to remove the cleaning liquid and / or coating liquid on the outer peripheral surface and the second side surface of the mask roller. The mask device of the present application can not only improve the coating quality of the substrate assembly, but also can automatically clean the mask roller to achieve continuous coating and improve the coating efficiency. In addition, the mask device has a compact structure and occupies a small space.

Description

Technical Field

[0001] The present invention relates to the technical field of coating equipment, and in particular to a coating equipment and a mask device. Background Art

[0002] Perovskite solar cells have the advantages of high photoelectric conversion efficiency, long life, and low preparation cost, and have been widely used. In the production process of perovskite solar cells, a perovskite solution needs to be coated on the substrate component through a coating device to form a perovskite film layer. The uniformity of the coating of the perovskite solution will affect the photoelectric conversion efficiency of the perovskite solar cell. Since the inner wall of the discharge slit of the coating head will affect the flow rate of the coating liquid, especially the low and uneven flow rate of the coating liquid at both ends of the coating head, the coating quality at both ends of the substrate component is poor. How to improve the coating quality of the substrate component is a difficult problem that needs to be solved urgently. Summary of the invention

[0003] The object of the present invention is to provide a coating device and a mask device, which can not only improve the coating quality of the substrate assembly, but also automatically clean the mask roller to achieve continuous coating and improve the coating efficiency. In addition, the mask device has a compact structure and occupies little space.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A mask device is provided at both ends of the coating head in the length direction, and the mask device comprises:

[0006] Mounting bracket;

[0007] A mask roller assembly, the mask roller assembly comprising a rotatable mask roller, the mask roller being disposed on the mounting bracket, the mask roller comprising an outer peripheral surface and a first side surface and a second side surface at both ends of the mask roller, the outer peripheral surface of the mask roller being used to adhere to the coating liquid extruded by the coating head;

[0008] A cleaning component, wherein the cleaning component includes a plurality of nozzles and a plurality of scrapers, wherein the plurality of nozzles and a portion of the scrapers are arranged toward the outer peripheral surface of the mask roller, and another portion of the scrapers are arranged toward the second side surface of the mask roller, wherein the nozzles are used for spraying cleaning liquid onto the mask roller, and the scrapers are used for removing the cleaning liquid and / or the coating liquid on the outer peripheral surface and the second side surface of the mask roller.

[0009] Preferably, the mounting bracket comprises a bottom wall, a first side wall and a second side wall which are arranged opposite to each other, and a third side wall and a fourth side wall which are arranged opposite to each other, wherein the bottom wall, the first side wall, the second side wall, the third side wall and the fourth side wall are arranged to form a receiving space, and at least part of the mask roller is arranged in the receiving space;

[0010] The plurality of nozzles and the scraper arranged toward the outer circumferential surface of the mask roller include a first nozzle, a first scraper, a second scraper, a second nozzle, and a third scraper arranged in sequence along the circumference of the mask roller, and the distribution direction of the first nozzle, the first scraper, the second scraper, the second nozzle, and the third scraper arranged in sequence along the circumference of the mask roller is consistent with the rotation direction of the mask roller;

[0011] The scraper disposed toward the second side surface of the mask roller includes a fourth scraper, a fifth scraper, and a sixth scraper sequentially disposed along the circumferential direction of the mask roller.

[0012] Preferably, the first nozzle is arranged near the middle of the first side wall, there are a plurality of the first nozzles, and the plurality of the first nozzles are evenly distributed along the axial direction of the mask roller;

[0013] The second nozzle is arranged at a position close to the middle and lower part of the second side wall. There are a plurality of the second nozzles, and the plurality of the second nozzles are evenly distributed along the axial direction of the mask roller.

[0014] Preferably, the first scraper is arranged at the connection between the first side wall and the bottom wall, and the first scraper is slidably connected to the outer peripheral surface of the mask roller;

[0015] The second scraper is arranged at the connection between the second side wall and the bottom wall, and the second scraper is slidably connected to the outer peripheral surface of the mask roller;

[0016] The third scraper is arranged at a position close to the middle and upper part of the second side wall, and the third scraper is slidably connected to the outer peripheral surface of the mask roller;

[0017] The fourth scraper, the fifth scraper and the sixth scraper are all disposed on the third side wall and are slidably connected to the second side surface of the mask roller.

[0018] Preferably, at least one adjacent end of the first scraper and the fourth scraper are at the same height; and / or,

[0019] At least one adjacent end of the second scraper and the fifth scraper is at the same height; and / or,

[0020] At least one adjacent end of the third scraper and the sixth scraper are at the same height.

[0021] Preferably, it further comprises a driving assembly, and the mask roller assembly further comprises a connecting shaft, one end of the connecting shaft is connected to the mask roller, and the other end of the connecting shaft is connected to the driving assembly, and the driving assembly is used to drive the mask roller to rotate.

[0022] Preferably, the drive assembly includes a drive part, a reducer, a coupling, a fastener and an angular contact bearing, the drive part is connected to the reducer, the connecting shaft is connected to the reducer through the coupling, and the fastener and the angular contact bearing are sleeved on the connecting shaft.

[0023] Preferably, the mounting bracket is provided with a first solution tank, a second solution tank and a third solution tank extending along the axial direction of the mask roller, the second solution tank is arranged near the middle of the bottom wall, and the first solution tank and the third solution tank are respectively arranged on both sides of the second solution tank.

[0024] Preferably, a top plate is disposed on the top of the first side wall and the second side wall, and an opening extending along the axial direction of the mask roller is disposed on the top plate, and a portion of the mask roller is exposed from the opening.

[0025] A coating device comprises two mask devices and a coating head as described above, wherein a discharge slit for coating the substrate assembly is arranged on the side of the coating head facing the substrate assembly, and the length of the discharge slit is greater than the width of the substrate assembly, and the two mask devices are arranged near the two ends of the coating head respectively.

[0026] Compared with the prior art, the beneficial effects of the present invention include at least:

[0027] The coating equipment and mask device of the present invention respectively set mask devices at both ends of the coating head, and set the length of the discharge slit of the coating head to be greater than the width of the substrate assembly to be coated, so that the coating liquid is squeezed out unevenly at both ends and coated on the mask roller, ensuring the uniformity and coating quality of the substrate assembly coating, thereby improving the quality of the perovskite solar cell. At the same time, the outer peripheral surface and the second side surface of the mask roller are cleaned by the cleaning component, and the mask roller can be automatically cleaned to achieve continuous coating, which not only improves the coating efficiency, but also prevents the waste liquid on the mask roller from contaminating the coating head, which can improve the effect of pre-coating and ensure the quality of coating. At the same time, the mask device and coating equipment of the present application have a compact structure and occupy a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the planar structure of a coating device according to an embodiment of the present invention.

[0029] Figure 2 3D is a schematic diagram of the three-dimensional structure of a mask device according to an embodiment of the present invention.

[0030] Figure 3 Schematic diagram of the planar structure of the mask device according to an embodiment of the present invention.

[0031] Figure 4 yes Figure 3Schematic diagram of the cross section along the AA direction.

[0032] Figure 5 yes Figure 3 Schematic diagram of the cross section along direction BB.

[0033] Figure 6 It is a three-dimensional structural schematic diagram of a mask roller assembly and a cleaning assembly in an embodiment of the present invention from one viewing angle.

[0034] Figure 7 It is a three-dimensional structural schematic diagram of the mask roller assembly and the cleaning assembly in the embodiment of the present invention from another viewing angle.

[0035] Figure 8 yes Figure 7 A partial enlarged schematic diagram in the middle.

[0036] In the figure: 100, mask device; 1, mounting bracket; 11, bottom wall; 111, first solution tank; 112, second solution tank; 113, third solution tank; 12, first side wall; 13, second side wall; 14, third side wall; 15, fourth side wall; 16, accommodating space; 17, top plate; 171, opening; 2, mask roller assembly; 21, mask roller; 211, outer peripheral surface; 212, first side surface; 213, second side surface; 22, connecting shaft; 3, cleaning assembly ; 31. First nozzle; 311. First mounting plate; 32. First scraper; 33. Second scraper; 34. Second nozzle; 341. Second mounting plate; 35. Third scraper; 36. Fourth scraper; 37. Fifth scraper; 38. Sixth scraper; 4. Drive assembly; 41. Drive unit; 42. Reducer; 43. Coupling; 44. Fastener; 45. Angular contact bearing; 46. Support unit; 200. Coating equipment; 210. Coating head; 300. Base assembly. DETAILED DESCRIPTION

[0037] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0038] The words expressing positions and directions described in the present invention are all explained with reference to the accompanying drawings as examples, but they can be changed as needed, and all such changes are included in the protection scope of the present invention.

[0039] Reference Figures 1 to 8The present invention provides a coating device 200, which may include a mask device 100 and a coating head 210, wherein the mask device 100 is disposed near the end of the coating head 210. A discharge slit (not shown) for coating the substrate assembly 300 is disposed on one side of the coating head 210 facing the substrate assembly 300, wherein the length of the discharge slit is greater than the width of the substrate assembly 300, and the mask device 100 is disposed near the end of the coating head 210.

[0040] Since the flow rate of the coating liquid will be affected by the inner wall of the discharge slit of the coating head 210, the coating liquid can be a perovskite solution, and the flow rate of the coating liquid at both ends of the coating head 210 is low and uneven, resulting in poor coating quality at both ends of the substrate assembly 300. The two ends of the coating head 210 protrude from the two ends of the substrate assembly 300 respectively, and the mask device 100 can be arranged close to the end of the coating head 210 in the length direction, and the coating head 210 applies the uneven coating liquid at both ends to the mask device 100. The number of mask devices 100 is preferably two, and the two mask devices 100 are symmetrically arranged at the two ends of the coating head 210 in the length direction. The two mask devices 100 are respectively arranged on the outside of the two ends of the substrate assembly 300, that is, the substrate assembly 300 is located between the two mask devices 100, and the coating liquid at the two ends of the coating head 210 is coated on the mask device 100, avoiding uneven coating of the coating liquid at the two ends of the coating head 210 on the substrate assembly 300, thereby improving the coating effect.

[0041] The mask device 100 may include: a mounting bracket 1 , a mask roller assembly 2 and a cleaning assembly 3 . The mask roller assembly 2 and the cleaning assembly 3 are disposed on the mounting bracket 1 , and the cleaning assembly 3 is disposed around the mask roller 21 and is used to clean the mask roller 21 .

[0042] Specifically, the mounting bracket 1 is a hollow cuboid as a whole, and the mounting bracket 1 may include a bottom wall 11, a first side wall 12 and a second side wall 13 that are arranged opposite to each other, and a third side wall 14 and a fourth side wall 15 that are arranged opposite to each other. The first side wall 12, the second side wall 13, the third side wall 14 and the fourth side wall 15 may be arranged around the bottom wall 11 respectively, and the first side wall 12, the second side wall 13, the third side wall 14 and the fourth side wall 15 may be arranged vertically or approximately vertically to the bottom wall 11 respectively, the first side wall 12 and the second side wall 13 may be arranged parallelly or approximately parallelly, the third side wall 14 and the fourth side wall 15 may be arranged parallelly or approximately parallelly, and the bottom wall 11, the first side wall 12, the second side wall 13, the third side wall 14 and the fourth side wall 15 may be arranged to form a receiving space 16. A top plate 17 may be provided on the top of the first side wall 12 and the second side wall 13. The top plate 17 is provided with an opening 171 extending along the axial direction of the mask roller 21, and a portion of the mask roller 21 is exposed from the opening 171. The top plate 17 may prevent the cleaning liquid from leaving the accommodating space 16, thereby preventing the cleaning liquid from contaminating the coating head 210 and the working environment.

[0043] The mask roller assembly 2 may include a rotatable mask roller 21. The mask roller 21 may be cylindrical as a whole. The axial extension direction of the mask roller 21 is preferably parallel or substantially parallel to the length extension direction of the coating head 210. The mask roller 21 is disposed on the mounting bracket 1. At least a portion of the mask roller 21 is disposed in the accommodating space 16. The mask roller 21 is used to adhere to the coating liquid extruded by the coating head 210. The mask roller 21 may include an outer peripheral surface 211 and a first side surface 212 and a second side surface 213 at both ends of the mask roller 21. The outer peripheral surface 211 of the mask roller 21 is used to adhere to the coating liquid extruded by the coating head 210. The first side surface 212 of the mask roller 21 is the outer side surface of the mask roller 21, that is, the first side surface 212 of the mask roller 21 is disposed away from the substrate assembly 300, and the second side surface 213 of the mask roller 21 is the inner side surface of the mask roller 21, that is, the second side surface 213 of the mask roller 21 is disposed toward the substrate assembly 300. The mask roller 21 is preferably made of stainless steel, which has the characteristics of corrosion resistance and high strength, and can ensure that the mask roller 21 can work stably for a long time. In the axial direction of the coating head 210, the first side 212 of the mask roller 21 protrudes from the end of the coating head 210, that is, the end of the coating head 210 is located directly above the outer peripheral surface 211 of the mask roller 21, which can avoid or reduce the coating liquid flowing to the first side 212 of the mask roller 21, so that it is not necessary to clean the first side 212 of the mask roller 21, thereby simplifying the structure of the mask device 100. The length of the mask roller 21 is less than or equal to the length of the mounting bracket 1, that is, the length of the mask roller 21 is less than or equal to the length of the accommodating space 16, so that the mask roller 21 can be completely in the accommodating space 16 in the length direction, ensuring that the coating liquid attached to the mask roller 21 will not flow to the outside of the accommodating space 16.

[0044] As a preferred method, refer to Figure 5 , Figure 6 , Figure 7 The mask roller assembly 2 may further include a connecting shaft 22, one end of which may be connected to the mask roller 21. In this embodiment, the connecting shaft 22 may be connected to the first side surface 212 of the mask roller 21, and the connecting shaft 22 and the mask roller 21 may be connected by screw locking. The connecting shaft 22 may pass through the fourth side wall 15, and the connecting shaft 22 is rotatably connected to the fourth side wall 15. At the same time, the fourth side wall 15 has a certain supporting effect on the connecting shaft 22, thereby improving the stability of the rotation of the mask roller 21.

[0045] Reference Figure 5The other end of the connecting shaft 22 can be connected to the driving assembly 4, and the driving assembly 4 is used to drive the mask roller 21 to rotate, so as to realize the automatic rotation of the mask roller 21. The driving assembly 4 may include a driving part 41, a reducer 42, a coupling 43, a fastener 44 and an angular contact bearing 45. The driving part 41 is connected to the reducer 42, and the driving part 41 and the reducer 42 can be connected by screw locking. The coupling 43 is installed between the output shaft of the reducer 42 and the connecting shaft 22, and the connecting shaft 22 is connected to the reducer 42 through the coupling 43. The fastener 44 and the angular contact bearing 45 are sleeved on the connecting shaft 22. The driving part 41 can be a motor, an electric motor, etc. The speed reducer 42 can not only increase the output torque of the driving part 41, but also control the speed of the driving part 41, so that the rotation speed of the mask roller 21 is the same or approximately the same as the coating speed of the coating head 210, thereby reducing or avoiding the coating of the substrate by the coating head 210 due to the different rotation speeds of the mask roller 21, thereby ensuring the coating quality of the coating head 210. The number of angular contact bearings 45 is preferably two, which can withstand a certain degree of radial force generated by the connecting shaft 22, which can not only improve the rotation accuracy of the connecting shaft 22, but also extend the service life of the connecting shaft 22. The fastener 44 is, for example, a locking nut, and the fastener 44 can tighten the clearance between the two angular contact bearings 45, so that the eccentric rotation of the connecting shaft 22 can be avoided, thereby avoiding the eccentric rotation of the mask roller 21, thereby further improving the rotation accuracy of the mask roller 21, and at the same time, it can also extend the service life of the angular contact bearings 45, the connecting shaft 22 and other components, thereby extending the service life of the mask device 100. In some embodiments, the driving assembly 4 may further include a supporting portion 46 , which may provide supporting force for the driving assembly 4 as a whole, thereby facilitating the installation and fixation of the driving assembly 4 .

[0046] Reference Figure 4 , Figure 6 , Figure 7 The cleaning component 3 may include multiple nozzles and multiple scrapers. The multiple nozzles and a part of the scrapers are arranged toward the outer peripheral surface 211 of the mask roller 21, and the other part of the scrapers are arranged toward the second side 213 of the mask roller 21. The nozzles are used to spray cleaning liquid onto the mask roller 21. The cleaning liquid can make the coating liquid fall off from the mask roller 21 more easily. The scrapers are used to remove the cleaning liquid and / or coating liquid on the outer peripheral surface 211 and the second side 213 of the mask roller 21, so that when the mask roller 21 rotates to the corresponding position of the coating head 210, the surface of the mask roller 21 remains clean.

[0047] As a preferred mode, during the operation of the coating device 200, the coating head 210 and the mask device 100 do not move in the coating direction, but by moving the substrate assembly 300, the coating head 210 and the substrate assembly 300 are moved relative to each other, so that the coating head 210 can coat the substrate assembly 300. The coating head 210 squeezes the coating liquid toward the rotating mask roller 21, and the outer peripheral surface 211 of the rotating mask roller 21 can take away the uneven coating liquid at both ends of the coating head 210. The cleaning component 3 can remove the coating liquid on the mask roller 21 to ensure that the corresponding position of the mask roller 21 and the coating head 210 is always kept clean. Of course, in some embodiments, the substrate assembly 300 does not move in the coating direction, and the coating head 210 and the mask device 100 move in the coating direction to achieve the relative movement of the coating head 210 and the substrate assembly 300, so that the coating head 210 can coat the substrate assembly 300.

[0048] Since the coating liquid is not only coated on the outer surface 211 of the mask roller 21, there is a certain gap between the mask roller 21 and the substrate assembly 300, and part of the coating liquid will also flow to the second side surface 213 of the mask roller 21. In the present application, the outer surface 211 and the second side surface 213 of the mask roller 21 are cleaned by the cleaning assembly 3, which can not only collect and treat the waste liquid to avoid waste liquid polluting the environment, but also the cleaning assembly 3 can automatically clean the mask roller 21, ensuring that the coating head 210 can operate continuously, improving the production efficiency of the coating equipment 200, and can also avoid the waste liquid on the mask roller 21 from polluting the coating head 210, which can improve the pre-coating effect and ensure the coating quality. At the same time, the mask device 100 of the present application has a compact structure, occupies a small space, and reduces the volume of the coating equipment 200.

[0049] In a specific embodiment, referring to Figure 4 , Figure 6 , Figure 7The plurality of nozzles and scrapers disposed toward the outer circumferential surface 211 of the mask roller 21 may include a first nozzle 31, a first scraper 32, a second scraper 33, a second nozzle 34, and a third scraper 35 sequentially disposed along the circumference of the mask roller 21. That is, the plurality of nozzles may include a first nozzle 31 and a second nozzle 34, and the scrapers disposed toward the outer circumferential surface 211 of the mask roller 21 may include a first scraper 32, a second scraper 33, and a third scraper 35. The first nozzle 31 and the second nozzle 34 are both facing the outer peripheral surface 211 of the mask roller 21 and are used to spray cleaning liquid onto the outer peripheral surface 211 of the mask roller 21. The cleaning liquid can make the coating liquid fall off from the mask roller 21 more easily. The first scraper 32, the second scraper 33 and the third scraper 35 are all slidably connected to the outer peripheral surface 211 of the mask roller 21. The first scraper 32, the second scraper 33 and the third scraper 35 are all used to remove the cleaning liquid and / or the coating liquid on the outer peripheral surface 211 of the mask roller 21, so that when the mask roller 21 rotates to the corresponding position of the coating head 210, the surface of the mask roller 21 remains clean. The first nozzle 31 sprays the cleaning liquid on the outer peripheral surface 211 of the mask roller 21 for the first time, the first scraper 32 is used to remove the cleaning liquid and the coating liquid on the outer peripheral surface 211 of the mask roller 21 for the first time, the second scraper 33 is used to remove the coating liquid remaining on the outer peripheral surface 211 of the mask roller 21 after cleaning by the first scraper 32, and further remove the coating liquid on the outer peripheral surface 211 of the mask roller 21, the second nozzle 34 sprays the cleaning liquid on the outer peripheral surface 211 of the mask roller 21 for the second time, and the third scraper 35 is used to remove the cleaning liquid and / or coating liquid on the outer peripheral surface 211 of the mask roller 21 for the third time.

[0050] The distribution direction of the first nozzle 31, the first scraper 32, the second scraper 33, the second nozzle 34 and the third scraper 35 arranged in sequence along the circumference of the mask roller 21 is consistent with the rotation direction of the mask roller 21, that is, when the mask roller 21 rotates clockwise, the distribution direction of the first nozzle 31, the first scraper 32, the second scraper 33, the second nozzle 34 and the third scraper 35 arranged in sequence along the circumference of the mask roller 21 is clockwise, and when the mask roller 21 rotates counterclockwise, the distribution direction of the first nozzle 31, the first scraper 32, the second scraper 33, the second nozzle 34 and the third scraper 35 arranged in sequence along the circumference of the mask roller 21 is counterclockwise, so that the mask roller 21 with the coating liquid attached can be cleaned according to the preset order of the cleaning component 3, ensuring that the mask roller 21 is cleaned, avoiding residual cleaning liquid and / or coating liquid on the mask roller 21, thereby affecting the pre-coating effect, and avoiding the cleaning liquid from contaminating the coating head 210. In this embodiment, the mask roller 21 rotates clockwise, and the first nozzle 31, the first scraper 32, the second scraper 33, the second nozzle 34 and the third scraper 35 are sequentially arranged along the circumference of the mask roller 21 in a clockwise distribution direction. In this application, this is taken as an example for explanation.

[0051] The scraper arranged toward the second side 213 of the mask roller 21 may include a fourth scraper 36, a fifth scraper 37 and a sixth scraper 38 arranged in sequence along the circumference of the mask roller 21, and the fourth scraper 36, the fifth scraper 37 and the sixth scraper 38 are all slidingly connected to the second side 213 of the mask roller 21, and the fourth scraper 36, the fifth scraper 37 and the sixth scraper 38 are all used to remove the cleaning liquid and / or the coating liquid on the second side 213 of the mask roller 21.

[0052] The first nozzle 31, the first scraper 32, the second scraper 33, the second nozzle 34, the third scraper 35, the fourth scraper 36, the fifth scraper 37 and the sixth scraper 38 are preferably all arranged in the accommodating space 16, that is, the first nozzle 31, the first scraper 32, the second scraper 33, the second nozzle 34, the third scraper 35, the fourth scraper 36, the fifth scraper 37 and the sixth scraper 38 are installed on the mounting bracket 1. On the one hand, it is convenient for the installation of the cleaning component 3 and reduces the overall volume of the mask device 100. On the other hand, the cleaning liquid and / or coating liquid generated during the operation of the cleaning component 3 can be confined in the accommodating space 16 to prevent the cleaning liquid and / or coating liquid from splashing outside the accommodating space 16. The first scraper 32, the second scraper 33, the third scraper 35, the fourth scraper 36, the fifth scraper 37 and the sixth scraper 38 are all made of elastic material, which can be PTFE material. PTFE material has corrosion resistance and wear resistance, which extends the service life of the first scraper 32, the second scraper 33, the third scraper 35, the fourth scraper 36, the fifth scraper 37 and the sixth scraper 38. The PTFE material also has a certain toughness and elasticity and can be adhered to the mask roller 21, so as to better remove the cleaning liquid and / or coating liquid on the mask roller 21.

[0053] In a specific embodiment, referring to Figure 4 The first nozzle 31 is preferably arranged near the middle of the first side wall 12, that is, the first nozzle 31 is arranged near the middle of the height direction of the mask roller 21, and the first nozzle 31 sprays the cleaning liquid toward the side of the mask roller 21 away from the coating head 210, that is, the first nozzle 31 is inclined toward the lower left, that is, the angle between the extension line of the first nozzle 31 and the mask roller 21 is less than 90°. In this way, on the one hand, the first nozzle 31 can better flush the coating liquid on the mask roller 21, and on the other hand, when the first nozzle 31 sprays the cleaning liquid onto the mask roller 21, the cleaning liquid can be prevented from splashing onto the coating head 210, thereby preventing the cleaning liquid from contaminating the coating head 210.

[0054] The number of the first nozzles 31 is preferably multiple, and the multiple first nozzles 31 are evenly distributed along the axial direction of the mask roller 21 to ensure that the first nozzles 31 can evenly spray the cleaning liquid on the mask roller 21, thereby improving the cleaning effect of the cleaning liquid. At the same time, the multiple first nozzles 31 can enhance the flushing pressure on the mask roller 21, thereby improving the flushing effect of the first nozzles 31. The multiple first nozzles 31 can be disposed on the first side wall 12 through the first mounting plate 311.

[0055] Reference Figure 4 The second nozzle 34 is preferably arranged at a position close to the middle and lower part of the second side wall 13, that is, the second nozzle 34 is arranged at a position close to the middle and lower part in the height direction of the mask roller 21, and the second nozzle 34 sprays the cleaning liquid toward the side of the mask roller 21 away from the coating head 210. When the second nozzle 34 sprays the cleaning liquid onto the mask roller 21, the cleaning liquid can be prevented from splashing onto the coating head 210, thereby preventing the cleaning liquid from contaminating the coating head 210.

[0056] The number of the second nozzles 34 is preferably multiple, and the multiple second nozzles 34 are evenly distributed along the axial direction of the mask roller 21 to ensure that the second nozzles 34 can evenly spray the cleaning liquid on the mask roller 21, thereby improving the cleaning effect of the cleaning liquid. At the same time, the multiple second nozzles 34 can enhance the flushing pressure on the mask roller 21, thereby improving the flushing effect of the second nozzles 34. The multiple second nozzles 34 can be arranged on the first side wall 12 through the second mounting plate 341.

[0057] Reference Figure 4 The first scraper 32 is preferably disposed at the connection between the first side wall 12 and the bottom wall 11, and the first scraper 32 is slidably connected to the outer peripheral surface 211 of the mask roller 21. The first scraper 32 is vertically or obliquely disposed to the outer peripheral surface 211 of the mask roller 21. In this embodiment, the first scraper 32 can be inclined to the upper right, and the angle between the first scraper 32 and the mask roller 21 is less than 90°, that is, the direction in which the first scraper 32 extends is opposite to the direction in which the mask roller 21 rotates, which is equivalent to the first scraper 32 scraping off the coating liquid and the cleaning liquid from the mask roller 21. The action force between the first scraper 32 and the mask roller 21 is greater, so that the effect of the first scraper 32 in removing the cleaning liquid and the coating liquid on the mask roller 21 can be improved.

[0058] Reference Figure 4The second scraper 33 is preferably disposed at the connection between the second side wall 13 and the bottom wall 11, and the second scraper 33 is slidably connected to the outer peripheral surface 211 of the mask roller 21. The second scraper 33 is vertically or obliquely disposed to the outer peripheral surface 211 of the mask roller 21. In this embodiment, the second scraper 33 can be inclined to the upper left, and the angle between the second scraper 33 and the mask roller 21 is less than 90°, that is, the direction in which the second scraper 33 extends is opposite to the direction in which the mask roller 21 rotates, which is equivalent to the second scraper 33 scraping off the coating liquid and the cleaning liquid from the mask roller 21. The action force between the second scraper 33 and the mask roller 21 is greater, so that the effect of the second scraper 33 in removing the cleaning liquid and the coating liquid on the mask roller 21 can be improved.

[0059] Reference Figure 4 The third scraper 35 is preferably disposed at a position close to the middle and upper part of the second side wall 13, and the third scraper 35 is slidably connected to the outer peripheral surface 211 of the mask roller 21. The third scraper 35 is vertically or obliquely disposed to the outer peripheral surface 211 of the mask roller 21. In this embodiment, the direction in which the third scraper 35 extends is the same as the direction in which the mask roller 21 rotates, which is equivalent to the third scraper 35 wiping the coating liquid and the cleaning liquid from the mask roller 21, so that the third scraper 35 cleans the mask roller 21.

[0060] Reference Figure 7 The fourth scraper 36, the fifth scraper 37 and the sixth scraper 38 are all arranged on the third side wall 14 and are slidably connected to the second side surface 213 of the mask roller 21. The fourth scraper 36, the fifth scraper 37 and the sixth scraper 38 can be vertically or inclined to the second side surface 213 of the mask roller 21.

[0061] As a preferred method, refer to Figure 7 , Figure 8 At least one adjacent end of the first scraper 32 and the fourth scraper 36 is at the same height, which is equivalent to that one adjacent end of the first scraper 32 and the fourth scraper 36 are arranged to intersect, so that the work of the first scraper 32 and the fourth scraper 36 does not affect each other, that is, the coating liquid and / or the cleaning liquid will not splash onto the second side surface 213 of the mask roller 21 cleaned by the fourth scraper 36 under the action of the first scraper 32, and the coating liquid and / or the cleaning liquid will not splash onto the outer peripheral surface 211 of the mask roller 21 cleaned by the first scraper 32 under the action of the fourth scraper 36.

[0062] Reference Figure 7At least one adjacent end of the second scraper 33 and the fifth scraper 37 is at the same height, which is equivalent to the adjacent ends of the second scraper 33 and the fifth scraper 37 being arranged to intersect, so that the operations of the second scraper 33 and the fifth scraper 37 do not affect each other, that is, the coating liquid and / or the cleaning liquid will not splash onto the second side surface 213 of the mask roller 21 cleaned by the fifth scraper 37 under the action of the second scraper 33, and the coating liquid and / or the cleaning liquid will not splash onto the outer peripheral surface 211 of the mask roller 21 cleaned by the second scraper 33 under the action of the fifth scraper 37.

[0063] Reference Figure 7 At least one adjacent end of the third scraper 35 and the sixth scraper 38 is at the same height, which is equivalent to the adjacent ends of the third scraper 35 and the sixth scraper 38 being arranged to intersect, so that the work of the third scraper 35 and the sixth scraper 38 does not affect each other, that is, the coating liquid and / or the cleaning liquid will not splash onto the second side surface 213 of the mask roller 21 cleaned by the sixth scraper 38 under the action of the third scraper 35, and the coating liquid and / or the cleaning liquid will not splash onto the outer peripheral surface 211 of the mask roller 21 cleaned by the third scraper 35 under the action of the sixth scraper 38.

[0064] Reference Figure 4 The mounting bracket 1 may be provided with a first solution tank 111, a second solution tank 112 and a third solution tank 113 extending along the axial direction of the mask roller 21. The second solution tank 112 may be provided near the middle of the bottom wall 11, and the first solution tank 111 and the third solution tank 113 may be provided on both sides of the second solution tank 112, respectively. The second solution tank 112 contains a cleaning liquid, and part of the mask roller 21 may be immersed in the cleaning liquid of the second solution tank 112, so that the coating liquid may be further accelerated to fall off from the mask roller 21. The first solution tank 111, the second solution tank 112 and the third solution tank 113 are relatively isolated from each other, and the cleaning liquid in the first solution tank 111, the second solution tank 112 and the third solution tank 113 may be neutralized with the coating liquid, so that the waste liquid in the first solution tank 111, the second solution tank 112 and the third solution tank 113 may meet the discharge standard, and the waste liquid may also be prevented from contaminating the mask device 100.

[0065] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and modify the above embodiments within the scope of the invention without departing from the principles and purpose of the present invention. All such changes should fall within the scope of protection of the claims of the present invention.

Claims

1. A coating device, characterized in that: It comprises two mask devices and a coating head, wherein a discharging slit for coating the substrate assembly is arranged on one side of the coating head facing the substrate assembly, the length of the discharging slit is greater than the width of the substrate assembly, and the two mask devices are arranged near the two ends of the coating head in the length direction respectively; The mask device comprises: Mounting bracket; A mask roller assembly, the mask roller assembly comprising a rotatable mask roller, the mask roller being arranged on the mounting bracket, the mask roller comprising an outer peripheral surface and a first side surface and a second side surface at both ends of the mask roller, the second side surface being arranged toward the substrate assembly, the outer peripheral surface of the mask roller being used for adhering the coating liquid extruded by the coating head; a cleaning assembly, the cleaning assembly being arranged around the mask roller and used for cleaning the mask roller, the cleaning assembly comprising a plurality of nozzles and a plurality of scrapers, the plurality of nozzles and a part of the scrapers being arranged toward the outer peripheral surface of the mask roller, and another part of the scrapers being arranged toward the second side surface of the mask roller, the nozzles being used for spraying a cleaning liquid onto the mask roller, and the scrapers being used for removing the cleaning liquid and / or the coating liquid on the outer peripheral surface and the second side surface of the mask roller; The scraper facing the outer circumference of the mask roller and the scraper facing the second side of the mask roller are arranged one by one, and the corresponding scraper facing the outer circumference of the mask roller and the scraper facing the second side of the mask roller are at the same height at one end.

2. The coating device according to claim 1, characterized in that: The mounting bracket comprises a bottom wall, a first side wall and a second side wall which are arranged opposite to each other, and a third side wall and a fourth side wall which are arranged opposite to each other, wherein the bottom wall, the first side wall, the second side wall, the third side wall and the fourth side wall are arranged to form a receiving space, and at least part of the mask roller is arranged in the receiving space; The plurality of nozzles and the scraper arranged toward the outer circumferential surface of the mask roller include a first nozzle, a first scraper, a second scraper, a second nozzle, and a third scraper arranged in sequence along the circumference of the mask roller, and the distribution direction of the first nozzle, the first scraper, the second scraper, the second nozzle, and the third scraper arranged in sequence along the circumference of the mask roller is consistent with the rotation direction of the mask roller; The scraper disposed toward the second side surface of the mask roller includes a fourth scraper, a fifth scraper, and a sixth scraper sequentially disposed along the circumferential direction of the mask roller.

3. The coating device according to claim 2, characterized in that: The first nozzle is disposed at a position close to the middle of the first side wall, there are a plurality of the first nozzles, and the plurality of the first nozzles are evenly distributed along the axial direction of the mask roller; The second nozzle is arranged at a position close to the middle and lower part of the second side wall. There are a plurality of the second nozzles, and the plurality of the second nozzles are evenly distributed along the axial direction of the mask roller.

4. The coating device according to claim 2, characterized in that: The first scraper is arranged at the connection between the first side wall and the bottom wall, and the first scraper is slidably connected to the outer peripheral surface of the mask roller; The second scraper is arranged at the connection between the second side wall and the bottom wall, and the second scraper is slidably connected to the outer peripheral surface of the mask roller; The third scraper is arranged at a position close to the middle and upper part of the second side wall, and the third scraper is slidably connected to the outer peripheral surface of the mask roller; The fourth scraper, the fifth scraper and the sixth scraper are all disposed on the third side wall and are slidably connected to the second side surface of the mask roller.

5. The coating device according to claim 2, characterized in that: The adjacent ends of the first scraper and the fourth scraper are at the same height; and / or, The adjacent ends of the second scraper and the fifth scraper are at the same height; and / or, The adjacent ends of the third scraper and the sixth scraper are at the same height.

6. The coating device according to claim 1, characterized in that: It also includes a driving assembly, and the mask roller assembly also includes a connecting shaft, one end of the connecting shaft is connected to the mask roller, and the other end of the connecting shaft is connected to the driving assembly, and the driving assembly is used to drive the mask roller to rotate.

7. The coating device according to claim 6, characterized in that: The driving assembly includes a driving part, a reducer, a coupling, a fastener and an angular contact bearing. The driving part is connected to the reducer, the connecting shaft is connected to the reducer through the coupling, and the fastener and the angular contact bearing are sleeved on the connecting shaft.

8. The coating device according to claim 2, characterized in that: The mounting bracket is provided with a first solution tank, a second solution tank and a third solution tank extending along the axial direction of the mask roller, the second solution tank is arranged near the middle of the bottom wall, and the first solution tank and the third solution tank are arranged on both sides of the second solution tank respectively.

9. The coating device according to claim 2, characterized in that: A top plate is disposed on the top of the first side wall and the second side wall. An opening extending along the axial direction of the mask roller is disposed on the top plate, and a portion of the mask roller is exposed from the opening.

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