Coating equipment and bilateral mask device

Abstract

The utility model discloses coating equipment and a bilateral mask device, a coating head is provided with discharge slits, the bilateral mask device is arranged between the adjacent discharge slits, and the bilateral mask device comprises a mounting bracket, a rotating shaft assembly and a driving assembly. The rotating shaft assembly comprises two rotating shafts, the two rotating shafts are both arranged on the mounting bracket, each rotating shaft comprises a peripheral surface and a first side surface and a second side surface at two ends of the rotating shaft, the peripheral surfaces of the two rotating shafts are respectively used for adhering coating liquid extruded from adjacent discharging slits, and the two rotating shafts comprise the first rotating shaft and the second rotating shaft. The driving assembly is connected with the two rotating shafts and drives the two rotating shafts to rotate synchronously. The double-side mask device is compact in structure and small in occupied space, the consistency of pre-coating can be ensured, and the coating quality of the substrate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to coating equipment technical field especially relates to a kind of coating equipment and double edge mask device. BACKGROUND

[0002] Solar cells play an important role in promoting renewable energy, reducing carbon emissions and improving energy efficiency. Solar cells have been widely used in the fields of power, transportation, aerospace, construction, etc. In the production process of solar cells, coating liquid is coated on the substrate through the discharge slot of the coating head and forms a thin film. Since the inner wall of the discharge slot of the coating head affects the flow rate of the coating liquid, especially the flow rate of the coating liquid at both ends of the coating head is low and uneven, which leads to uneven coating of the substrate at both ends and affects the performance of the solar cell.

[0003] In the prior art, a mask device is usually provided at both ends of the coating head to remove the uneven coating liquid at both ends of the coating head. However, when multiple discharge slots are provided on the coating head and multiple substrates are coated simultaneously by the multiple discharge slots, two mask devices need to be provided between adjacent discharge slots. This not only occupies a large space, but also the rotational speeds of the two rotating shafts are inconsistent, which affects the pre-coating effect and thus reduces the coating quality of the substrate.

[0004] Therefore, the existing mask device needs to be improved. SUMMARY

[0005] The utility model aims at providing a kind of coating equipment and double edge mask device, not only compact structure, small space occupation, but also can ensure the consistency of pre-coating, improve the coating quality of substrate.

[0006] The utility model discloses the following technical solutions to achieve the purpose:

[0007] A double edge mask device is provided with a discharge slot on the coating head, and the double edge mask device is arranged between adjacent discharge slots. The double edge mask device comprises:

[0008] A mounting bracket is provided.

[0009] A rotating shaft assembly is provided, which comprises two rotating shafts. The two rotating shafts are arranged on the mounting bracket. The rotating shaft comprises an outer circumferential surface and a first side surface and a second side surface at both ends of the rotating shaft. The outer circumferential surfaces of the two rotating shafts are used to adhere the coating liquid squeezed out from the adjacent discharge slots. The two rotating shafts comprise a first rotating shaft and a second rotating shaft.

[0010] A driving assembly is provided, which is connected with the two rotating shafts and drives the two rotating shafts to rotate synchronously.

[0011] Preferably, the driving assembly comprises a driving mechanism, a synchronous belt and a synchronous wheel, the two rotating shafts are connected with the synchronous wheel through transmission shafts respectively, and the driving mechanism drives the synchronous wheel to rotate through the synchronous belt, so that the synchronous wheel drives the two rotating shafts to rotate synchronously.

[0012] Preferably, the two rotating shafts are each provided with a stepped portion at one end close to the base plate, and the stepped portion is arranged at the intersection between the outer circumferential surface of the rotating shaft and the second side surface of the rotating shaft.

[0013] Preferably, the cleaning assembly comprises a plurality of nozzles and a plurality of scrapers, the plurality of nozzles are arranged towards the outer circumferential surface of the rotating shaft, the nozzles are used to spray cleaning liquid to the rotating shaft, the plurality of scrapers are used to remove the cleaning liquid and / or the coating liquid on the outer circumferential surface of the rotating shaft and the second side surface of the rotating shaft, and the two cleaning assemblies comprise a first cleaning assembly and a second cleaning assembly used to clean the first rotating shaft and the second rotating shaft respectively.

[0014] Preferably, the scraper comprises a first scraping portion and a second scraping portion, the first scraping portion is used to remove the cleaning liquid and / or the coating liquid on the outer circumferential surface of the rotating shaft, and the second scraping portion is used to remove the cleaning liquid and / or the coating liquid on the second side surface of the rotating shaft.

[0015] Preferably, the mounting bracket comprises a bottom wall, first and second oppositely arranged side walls, and third and fourth oppositely arranged side walls, the bottom wall, the first side wall, the second side wall, the third side wall and the fourth side wall surround to form an accommodation space, at least part of the first rotating shaft and at least part of the second rotating shaft are arranged in the accommodation space, the number of the mounting brackets is two, and the two mounting brackets comprise a first mounting bracket and a second mounting bracket used to mount the first rotating shaft and the second rotating shaft respectively.

[0016] The plurality of nozzles and the plurality of scrapers comprise a first nozzle, a first scraper, a second scraper, a second nozzle and a third scraper arranged in sequence in the circumferential direction of the rotating shaft, and the distribution direction of the first nozzle, the first scraper, the second scraper, the second nozzle and the third scraper arranged in sequence in the circumferential direction of the rotating shaft is consistent with the rotating direction of the rotating shaft.

[0017] Preferably, the first nozzle is arranged at a position close to the middle of the first side wall, the number of the first nozzles is a plurality, and the plurality of first nozzles are uniformly distributed in the axial direction of the rotating shaft.

[0018] The second nozzles are arranged near the middle of the second side wall, and the number of the second nozzles is multiple, and the multiple second nozzles are uniformly distributed along the axial direction of the rotating shaft.

[0019] Preferably, the first scraping blade is arranged at the joint of the first side wall and the bottom wall, and the first scraping blade is in sliding connection with the outer circumferential surface of the rotating shaft and the second side surface of the rotating shaft.

[0020] The second scraping blade is arranged at the joint of the second side wall and the bottom wall, and the second scraping blade is in sliding connection with the outer circumferential surface of the rotating shaft and the second side surface of the rotating shaft.

[0021] The third scraping blade is arranged near the middle of the second side wall, and the third scraping blade is in sliding connection with the outer circumferential surface of the rotating shaft and the second side surface of the rotating shaft.

[0022] Preferably, the mounting bracket is provided with a first solution groove, a second solution groove and a third solution groove extending along the axial direction of the rotating shaft, the second solution groove is arranged near the middle of the bottom wall, and the first solution groove and the third solution groove are arranged on the two sides of the second solution groove respectively.

[0023] A coating device comprises the double-sided mask device and a plurality of discharge slots for coating a substrate, the length of the discharge slot is greater than the width of the substrate, and the double-sided mask device is arranged between adjacent discharge slots.

[0024] Compared with the prior art, the coating device and the double-sided mask device have at least the following beneficial effects:

[0025] The coating device and the double-sided mask device have the following beneficial effects: the first rotating shaft and the second rotating shaft are driven to rotate synchronously by the driving assembly, so that the structure of the double-sided mask device is compact and occupies small space, thereby reducing the overall volume of the coating device, the first rotating shaft and the second rotating shaft rotate synchronously, ensuring the consistency of pre-coating of the coating head on the first rotating shaft and the second rotating shaft, thereby improving the uniformity of substrate coating and the coating quality, and improving the quality of the solar cell. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a planar structure schematic view of the coating device of the embodiment of the utility model.

[0027] Figure 2 is a three-dimensional structure schematic view of the double-sided mask device of the embodiment of the utility model.

[0028] Figure 3 is a three-dimensional structure schematic view of the double-sided mask device of the embodiment of the utility model when the mounting bracket is not arranged.

[0029] Figure 4 It is the plane structure schematic diagram of the double-sided mask device of the embodiment of the utility model.

[0030] Figure 5 It is Figure 4 It is the section schematic diagram along A-A direction.

[0031] Figure 6 It is Figure 5 It is the partial enlarged schematic diagram at A in the middle.

[0032] Figure 7 It is Figure 4 It is the section schematic diagram along B-B direction.

[0033] Figure 8 It is the three-dimensional structure schematic diagram of the scraping sheet in the embodiment of the utility model.

[0034] In the figure: 100, double-sided mask device;1, mounting bracket;11, first mounting bracket;12, second mounting bracket;13, bottom wall;131, first solution tank;132, second solution tank;133, third solution tank;14, first side wall;15, second side wall;16, third side wall;17, fourth side wall;18, containing space;19, cover plate;191, opening;2, rotating shaft assembly;21, rotating shaft;211, first rotating shaft;212, second rotating shaft;213, outer peripheral surface;214, first side;215, second side;216, step portion;22, transmission shaft;3, drive assembly;31, drive mechanism;32, synchronous belt;33, synchronous wheel;4, cleaning assembly;41, first cleaning assembly;42, second cleaning assembly;43, first nozzle;431, first mounting plate;44, first scraping sheet;45, second scraping sheet;46, second nozzle;461, second mounting plate;47, third scraping sheet;48, first scraping portion;49, second scraping portion;200, coating equipment;210, coating head;220, discharge slit;300, substrate. DETAILED DESCRIPTION

[0035] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and fully convey the inventive aspects of the example implementations to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and descriptions of the same elements will not be repeated.

[0036] The words expressing position and direction described in the utility model are all illustrated by taking the drawings as examples, but changes can also be made according to needs, and the changes made are all included in the protection scope of the utility model.

[0037] Referring to Figures 1 to 8 The utility model provides a kind of coating equipment 200, coating equipment 200 can include double-sided mask device 100 and coating head 210, coating head 210 is provided with multiple discharge slit 220 towards the side of substrate 300, discharge slit 220 is used to coat substrate 300, the length of discharge slit 220 is greater than the width of substrate 300, double-sided mask device 100 between adjacent discharge slit 220, double-sided mask device 100 can simultaneously adhere coating liquid extruded by adjacent two discharge slit 220, and single-sided mask device can be arranged at the two ends of outermost side of coating head 210.Due to the flow speed of coating liquid can be influenced by the inner wall of discharge slit 220 of coating head 210, coating liquid can be perovskite solution, the flow rate of coating liquid at the two ends of discharge slit 220 is low and uneven, leading to the coating quality of the two ends of substrate 300 is poor, by setting mask device at the two ends of discharge slit 220, the uneven coating liquid at the two ends of discharge slit 220 is coated on mask device, so it can ensure the uniformity and quality of coating.

[0038] In the process of working of coating equipment 200, coating head 210 and double-sided mask device 100 do not move in coating direction, but by moving substrate 300, relative movement of coating head 210 and substrate 300 is realized, so that coating head 210 is coated on substrate 300.The discharge slit 220 of coating head 210 extrudes coating liquid to rotating shaft 21, and the outer circumferential surface 213 of rotating shaft 21 can take away the uneven coating liquid at the two ends of discharge slit 220 of coating head 210, and cleaning assembly 4 can remove the coating liquid on rotating shaft 21, to ensure that the position corresponding to discharge slit 220 of coating head 210 of rotating shaft 21 is always clean.Of course, in some embodiments, substrate 300 does not move in coating direction, and coating head 210 and double-sided mask device 100 move in coating direction, to realize relative movement of coating head 210 and substrate 300, so that the discharge slit 220 of coating head 210 is coated on substrate 300.

[0039] Referring to Figures 1 to 8 Double-sided mask device 100 can include mounting bracket 1, rotating shaft assembly 2 and driving assembly 3, and can also include cleaning assembly.Driving assembly 3 can drive rotating shaft assembly 2 to rotate, rotating shaft assembly 2 and cleaning assembly 4 are arranged on mounting bracket 1, and cleaning assembly 4 is arranged around rotating shaft 21 and is used to clean rotating shaft 21.

[0040] Specifically, referring to Figure 2 , Figure 5 , Figure 7The number of mounting brackets 1 is preferably two, and the two mounting brackets 1 can include a first mounting bracket 11 and a second mounting bracket 12 for mounting the first rotating shaft 211 and the second rotating shaft 212, respectively. The first mounting bracket 11 and the second mounting bracket 12 can be symmetrically arranged. The mounting bracket 1 is a hollow cuboid as a whole, and can include a bottom wall 13, first and second side walls 14 and 15 arranged opposite to each other, and third and fourth side walls 16 and 17 arranged opposite to each other. The first, second, third, and fourth side walls 14, 15, 16, and 17 can be arranged around the bottom wall 13, respectively, and can be arranged perpendicularly or approximately perpendicularly to the bottom wall 13, respectively. The first and second side walls 14 and 15 can be arranged parallel or approximately parallel to each other, and the third and fourth side walls 16 and 17 can be arranged parallel or approximately parallel to each other. The bottom wall 13, the first, second, third, and fourth side walls 14, 15, 16, and 17 can form an accommodation space 18 therearound. The first and second side walls 14 and 15 can be provided with a cover plate 19 at the top thereof, and the cover plate 19 can be provided with an opening 191 extending along the axial direction of the rotating shaft 21. Part of the rotating shaft 21 can be exposed from the opening 191. The cover plate 19 can prevent the cleaning liquid from leaving the accommodation space 18, thereby avoiding contamination of the coating head 210 and the working environment.

[0041] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 7 The rotating shaft assembly 2 can include two rotatable rotating shafts 21, and the two rotating shafts 21 can include a first rotating shaft 211 and a second rotating shaft 212. The first rotating shaft 211 and the second rotating shaft 212 can be mounted to the first mounting bracket 11 and the second mounting bracket 12, respectively. At least part of the first rotating shaft 211 can be arranged in the accommodation space 18 of the first mounting bracket 11, and at least part of the second rotating shaft 212 can be arranged in the accommodation space 18 of the second mounting bracket 12. The first rotating shaft 211 and the second rotating shaft 212 can be used to adhere the coating liquid extruded from the discharge slit 220 of the coating head 210.

[0042] The rotating shaft 21 can be a cylinder as a whole, and the axial extension direction of the rotating shaft 21 is preferably parallel or substantially parallel to the length extension direction of the coating head 210. The rotating shaft 21 can include an outer circumferential surface 213 for attaching the coating liquid extruded by the discharge slot 220 of the coating head 210, and a first side surface 214 and a second side surface 215 at both ends of the rotating shaft 21. The first side surface 214 of the rotating shaft 21 is an outer side surface of the rotating shaft 21, i.e., the first side surface 214 of the rotating shaft 21 faces away from the substrate 300, and the second side surface 215 of the rotating shaft 21 is an inner side surface of the rotating shaft 21, i.e., the second side surface 215 of the rotating shaft 21 faces toward the substrate 300. The first side surface 214 of the first rotating shaft 211 and the first side surface 214 of the second rotating shaft 212 are oppositely arranged, i.e., the first side surface 214 of the first rotating shaft 211 and the first side surface 214 of the second rotating shaft 212 are arranged close to each other, and the second side surface 215 of the first rotating shaft 211 and the second side surface 215 of the second rotating shaft 212 are oppositely arranged, i.e., the second side surface 215 of the first rotating shaft 211 and the second side surface 215 of the second rotating shaft 212 are arranged away from each other, that is, the first rotating shaft 211 and the second rotating shaft 212 are symmetrically arranged.

[0043] The rotating shaft 21 is preferably made of stainless steel, which has the characteristics of corrosion resistance and high strength, and can ensure that the rotating shaft 21 can work stably for a long time. In the axial direction of the coating head 210, the first side surface 214 of the rotating shaft 21 protrudes from the end of the discharge slot 220, i.e., the end of the discharge slot 220 is located directly above the outer circumferential surface 213 of the rotating shaft 21, which can avoid or reduce the flow of coating liquid to the first side surface 214 of the rotating shaft 21, so that the first side surface 214 of the rotating shaft 21 does not need to be cleaned, thereby simplifying the structure of the double mask device 100. The length of the rotating shaft 21 is less than or equal to the length of the mounting bracket 1, i.e., the length of the rotating shaft 21 is less than or equal to the length of the accommodation space 18, so that the rotating shaft 21 can be completely located in the accommodation space 18 in the length direction, and ensure that the coating liquid attached to the rotating shaft 21 does not flow outside the accommodation space 18.

[0044] As a preferred mode, with reference to Figure 5 、 Figure 6The two rotating shafts 21 are each provided with a stepped portion 216 at one end close to the substrate 300. The stepped portion 216 is arranged at the intersection of the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the rotating shaft 21. The stepped portion 216 extends along the axial direction of the rotating shaft 21, that is, the stepped portion 216 protrudes toward the side of the substrate 300 relative to the second side surface 215 of the rotating shaft 21. The stepped portion 216 has a whole annular shape, and the outer surface of the stepped portion 216 is arranged flush with the outer circumferential surface 213 of the rotating shaft 21, that is, the distance from the outer surface of the stepped portion 216 to the coating head 210 is equal to or approximately equal to the distance from the outer circumferential surface 213 of the rotating shaft 21 to the coating head 210. Since there is a gap between the rotating shaft 21 and the substrate 300, when the dispensing slot 220 of the coating head 210 is dispensing, the dispensing slot 220 will cover part of the outer circumferential surface 213 of the rotating shaft 21, the upper surface of the substrate 300, and the gap between the rotating shaft 21 and the substrate 300. Part of the coating liquid will flow along the second side surface 215 of the rotating shaft 21 to the axial center of the rotating shaft 21 through the gap, which will cause the thickness of the coating liquid to be reduced near the edge of the substrate 300 close to the rotating shaft 21, thereby causing the uniformity of the coating step of the substrate 300 to be poor. By arranging the stepped portion 216, the coating liquid has a large tension between the stepped portion 216 and the substrate 300, which can prevent the coating liquid from flowing along the second side surface 215 of the rotating shaft 21 to the axial center of the rotating shaft 21, thereby reducing the loss of the coating liquid at the edge position of the substrate 300, and improving the uniformity of the coating of the substrate 300.

[0045] With reference to Figure 3 , Figure 5 The driving assembly 3 can be connected with the two rotating shafts 21 and drive the two rotating shafts 21 to rotate synchronously. That is, one driving assembly 3 can be connected with the first rotating shaft 211 and the second rotating shaft 212 at the same time, and the driving assembly 3 can drive the first rotating shaft 211 and the second rotating shaft 212 to rotate synchronously.

[0046] With reference to Figure 5, the driving assembly 3 can include a driving mechanism 31, a synchronous belt 32 and a synchronous wheel 33, the driving mechanism 31 can be a motor, a motor or the like, the two rotating shafts 21 can be connected with the synchronous wheel 33 through the transmission shafts 22 respectively, the driving mechanism 31 can drive the synchronous wheel 33 to rotate through the synchronous belt 32, that is, the synchronous belt 32 is connected with the driving mechanism 31 and the synchronous wheel 33 at the same time, so as to drive the two rotating shafts 21 to rotate synchronously. The number of the transmission shafts 22 can be one or two. When the number of the transmission shafts 22 is one, the two ends of the transmission shaft 22 are connected with the first side surface 214 of the first rotating shaft 211 and the first side surface 214 of the second rotating shaft 212 respectively, and the synchronous wheel 33 can be sleeved on the transmission shaft 22. The transmission shaft 22 can pass through the fourth side wall 17 of the first mounting bracket 11 and the fourth side wall 17 of the second mounting bracket 12, and the transmission shaft 22 is rotatably connected with the fourth side wall 17 of the first mounting bracket 11 and the fourth side wall 17 of the second mounting bracket 12, while the fourth side wall 17 of the first mounting bracket 11 and the fourth side wall 17 of the second mounting bracket 12 have a certain supporting effect on the transmission shaft 22, thereby improving the stability of the rotating shaft 21. When the number of the transmission shafts 22 is two, the two transmission shafts 22 can include a first transmission shaft (not shown) and a second transmission shaft (not shown), one end of the first transmission shaft can be connected with the first side surface 214 of the first rotating shaft 211, the other end of the first transmission shaft can be connected with the synchronous wheel 33, one end of the second transmission shaft can be connected with the first side surface 214 of the second rotating shaft 212, and the other end of the second transmission shaft can be connected with the synchronous wheel 33.

[0047] In the present application, the first rotating shaft 211 and the second rotating shaft 212 are driven to rotate synchronously by the driving assembly 3, compared with driving by two driving assemblies 3, not only the structure of the double-sided mask device 100 is compact and occupies small space, thereby reducing the overall volume of the coating equipment 200, but also the first rotating shaft 211 and the second rotating shaft 212 rotate synchronously, which ensures the consistency of the pre-coating of the coating head 210 on the first rotating shaft 211 and the second rotating shaft 212, thereby improving the uniformity and coating quality of the substrate 300, and thereby improving the quality of the solar cell.

[0048] In a specific embodiment, with reference to Figure 3 , Figure 7The number of cleaning assemblies 4 can be two, and the two cleaning assemblies 4 can include a first cleaning assembly 41 and a second cleaning assembly 42 for cleaning the first rotating shaft 211 and the second rotating shaft 212, respectively. The first cleaning assembly 41 and the second cleaning assembly 42 can be symmetrically arranged. The cleaning assembly 4 can include a plurality of nozzles and a plurality of scrapers. The plurality of nozzles can be arranged towards the outer circumferential surface 213 of the rotating shaft 21, and the nozzles are used to spray cleaning liquid to the rotating shaft 21, which can make the coating liquid more easily fall off the rotating shaft 21. The plurality of scrapers can be arranged towards the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the rotating shaft 21, and the scrapers are used to remove the cleaning liquid and / or the coating liquid on the outer circumferential surface 213 and the second side surface 215 of the rotating shaft 21, so that the surface of the rotating shaft 21 is kept clean when the rotating shaft 21 rotates to the corresponding position of the coating head 210.

[0049] Since the coating liquid not only coats the outer circumferential surface 213 of the rotating shaft 21, but also flows to the second side surface 215 of the rotating shaft 21 due to the gap between the rotating shaft 21 and the substrate 300, in the present application, the cleaning assembly 4 is used to clean the outer circumferential surface 213 and the second side surface 215 of the rotating shaft 21. Not only can the waste liquid be collected and treated to avoid environmental pollution, but also the cleaning assembly 4 can automatically clean the rotating shaft 21, ensuring that the coating head 210 can continuously operate, improving the production efficiency of the coating equipment 200, and avoiding the waste liquid on the rotating shaft 21 from polluting the coating head 210, which can improve the pre-coating effect and ensure the coating quality. At the same time, the structure of the double-sided mask device 100 of the present application is compact, occupies small space, and reduces the volume of the coating equipment 200.

[0050] Referring to Figure 8 The scraper can include a first scraping portion 48 and a second scraping portion 49, and the first scraping portion 48 and the second scraping portion 49 are arranged vertically or approximately vertically to make the whole scraper L-shaped. The first scraping portion 48 can be used to remove the cleaning liquid and / or the coating liquid on the outer circumferential surface 213 of the rotating shaft 21, and the second scraping portion 49 can be used to remove the cleaning liquid and / or the coating liquid on the second side surface 215 of the rotating shaft 21, that is, the scraper can simultaneously remove the cleaning liquid and / or the coating liquid on the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the rotating shaft 21. The first scraping portion 48 and the second scraping portion 49 can be integrally formed, or the first scraping portion 48 and the second scraping portion 49 can be separate. In the present embodiment, the first scraping portion 48 and the second scraping portion 49 are integrally formed. The length of the second scraping portion 49 is preferably less than or equal to the radius of the second side surface 215, so that the cleaning liquid and / or the coating liquid on the second side surface 215 will not pollute the coating head 210, and at the same time, the second scraping portion 49 will not be unstable due to being too long and not fitting the second side surface 215 of the rotating shaft 21. Of course, the length of the second scraping portion 49 can also be greater than the radius of the second side surface 215.

[0051] In some embodiments, the wiper can further comprise a third wiper, which is arranged vertically or approximately vertically with the first wiper 48, so that the wiper as a whole is in the shape of U, and thus the wiper can clean the outer circumferential surface 213 of the rotating shaft 21, the second side surface 215 of the rotating shaft 21 and the first side surface 214 of the rotating shaft 21 at the same time.

[0052] As a preferred mode, referring to Figure 3 、 Figure 7 , the plurality of nozzles and the plurality of wipers can comprise a first nozzle 43, a first wiper 44, a second wiper 45, a second nozzle 46 and a third wiper 47 arranged in sequence along the circumference of the rotating shaft 21. That is, the plurality of nozzles can comprise the first nozzle 43 and the second nozzle 46, and the plurality of wipers can comprise the first wiper 44, the second wiper 45 and the third wiper 47. The first nozzle 43 and the second nozzle 46 are both directed towards the outer circumferential surface 213 of the rotating shaft 21 and used to spray cleaning liquid to the outer circumferential surface 213 of the rotating shaft 21, which can make the coating liquid more easily fall off from the rotating shaft 21, and the first wiper 44, the second wiper 45 and the third wiper 47 are all in sliding connection with the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the mask plate, and are used to remove the cleaning liquid and / or the coating liquid on the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the mask plate, so that the surface of the rotating shaft 21 is kept clean when the rotating shaft 21 rotates to the corresponding position of the coating head 210. The first nozzle 43 sprays the cleaning liquid to the outer circumferential surface 213 of the rotating shaft 21 for the first time, the first wiper 44 is used to remove the cleaning liquid and the coating liquid on the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the mask plate for the first time, the second wiper 45 is used to remove the coating liquid remaining on the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the mask plate after being cleaned by the first wiper 44, further remove the coating liquid on the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the mask plate, the second nozzle 46 sprays the cleaning liquid to the outer circumferential surface 213 of the rotating shaft 21 for the second time, and the third wiper 47 is used to remove the cleaning liquid and / or the coating liquid on the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the mask plate for the third time.

[0053] As a preferred mode, referring to Figure 7The distribution direction of the first nozzle 43, the first wiper 44, the second wiper 45, the second nozzle 46 and the third wiper 47 arranged along the circumference of the rotating shaft 21 in sequence is consistent with the rotation direction of the rotating shaft 21, that is, when the rotating shaft 21 rotates clockwise, the distribution direction of the first nozzle 43, the first wiper 44, the second wiper 45, the second nozzle 46 and the third wiper 47 arranged along the circumference of the rotating shaft 21 in sequence is clockwise, and when the rotating shaft 21 rotates counterclockwise, the distribution direction of the first nozzle 43, the first wiper 44, the second wiper 45, the second nozzle 46 and the third wiper 47 arranged along the circumference of the rotating shaft 21 in sequence is counterclockwise, so that the rotating shaft 21 adhered with the coating liquid can be cleaned in the preset order of the cleaning assembly 4, ensuring that the rotating shaft 21 is cleaned thoroughly, avoiding that the cleaning liquid and / or the coating liquid is left on the rotating shaft 21, thereby affecting the pre-coating effect, and also avoiding that the cleaning liquid pollutes the coating head 210. In the embodiment, the rotating shaft 21 rotates clockwise, and the distribution direction of the first nozzle 43, the first wiper 44, the second wiper 45, the second nozzle 46 and the third wiper 47 arranged along the circumference of the rotating shaft 21 in sequence is clockwise, which is taken as an example for description in the present application.

[0054] The first nozzle 43, the first wiper 44, the second wiper 45, the second nozzle 46 and the third wiper 47 are preferably arranged in the containing space 18, that is, the first nozzle 43, the first wiper 44, the second wiper 45, the second nozzle 46 and the third wiper 47 are mounted on the mounting bracket 1, which facilitates the installation of the cleaning assembly 4 and reduces the overall size of the double-sided mask device 100, and can also confine the cleaning liquid and / or the coating liquid generated during the operation of the cleaning assembly 4 in the containing space 18 to prevent the cleaning liquid and / or the coating liquid from splashing outside the containing space 18. The first wiper 44, the second wiper 45 and the third wiper 47 are made of elastic material, which can be PTFE material. The PTFE material has corrosion resistance and wear resistance, prolonging the service life of the first wiper 44, the second wiper 45 and the third wiper 47. The PTFE material also has certain toughness and elasticity and can be attached to the rotating shaft 21, which can better remove the cleaning liquid and / or the coating liquid on the rotating shaft 21.

[0055] In a specific embodiment, with reference to Figure 7The first nozzle 43 is preferably arranged near the middle of the first side wall 14, i.e. the first nozzle 43 is arranged near the middle in the height direction of the rotating shaft 21, and the first nozzle 43 sprays the cleaning liquid towards the side of the rotating shaft 21 away from the coating head 210, i.e. the first nozzle 43 is inclined towards the lower left, that is, the angle between the extension line of the first nozzle 43 and the rotating shaft 21 is less than 90°. In this way, on the one hand, the first nozzle 43 can better flush the coating liquid on the rotating shaft 21, and on the other hand, when the first nozzle 43 sprays the cleaning liquid to the rotating shaft 21, it can avoid the cleaning liquid splashing onto the coating head 210, thereby avoiding the cleaning liquid polluting the coating head 210.

[0056] The number of first nozzles 43 is preferably multiple, and the multiple first nozzles 43 are uniformly distributed along the axial direction of the rotating shaft 21, so as to ensure that the first nozzles 43 can uniformly spray the cleaning liquid on the rotating shaft 21, improve the cleaning effect of the cleaning liquid, and at the same time, the multiple first nozzles 43 can enhance the flushing pressure on the rotating shaft 21, thereby improving the flushing effect of the first nozzles 43. The multiple first nozzles 43 can be arranged on the first side wall 14 through the first mounting plate 431.

[0057] Referring to Figure 7 The second nozzle 46 is preferably arranged near the middle of the second side wall 15, i.e. the second nozzle 46 is arranged near the middle of the second side wall 15, and the second nozzle 46 sprays the cleaning liquid towards the side of the rotating shaft 21 away from the coating head 210, so as to avoid the cleaning liquid splashing onto the coating head 210 when the second nozzle 46 sprays the cleaning liquid to the rotating shaft 21, thereby avoiding the cleaning liquid polluting the coating head 210.

[0058] The number of second nozzles 46 is preferably multiple, and the multiple second nozzles 46 are uniformly distributed along the axial direction of the rotating shaft 21, so as to ensure that the second nozzles 46 can uniformly spray the cleaning liquid on the rotating shaft 21, improve the cleaning effect of the cleaning liquid, and at the same time, the multiple second nozzles 46 can enhance the flushing pressure on the rotating shaft 21, thereby improving the flushing effect of the second nozzles 46. The multiple second nozzles 46 can be arranged on the second side wall 15 through the second mounting plate 461.

[0059] Referring to Figure 7The first scraping blade 44 is preferably arranged at the joint of the first side wall 14 and the bottom wall 13, and is in sliding connection with the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the rotating shaft 21. The first scraping blade 44 is arranged perpendicularly or obliquely to the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the rotating shaft 21. In the embodiment, the first scraping blade 44 can be arranged obliquely to the upper right, and the angle between the first scraping blade 44 and the rotating shaft 21 is less than 90°, that is, the extending direction of the first scraping blade 44 is opposite to the rotating direction of the rotating shaft 21, which means that the first scraping blade 44 can shovel the coating liquid and the cleaning liquid off the rotating shaft 21, and the force between the first scraping blade 44 and the rotating shaft 21 is greater, so that the effect of removing the coating liquid and the cleaning liquid on the rotating shaft 21 by the first scraping blade 44 is improved.

[0060] With reference to Figure 7 The second scraping blade 45 is preferably arranged at the joint of the second side wall 15 and the bottom wall 13, and is in sliding connection with the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the rotating shaft 21. The second scraping blade 45 is arranged perpendicularly or obliquely to the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the rotating shaft 21. In the embodiment, the second scraping blade 45 can be arranged obliquely to the upper left, and the angle between the second scraping blade 45 and the rotating shaft 21 is less than 90°, that is, the extending direction of the second scraping blade 45 is opposite to the rotating direction of the rotating shaft 21, which means that the second scraping blade 45 can shovel the coating liquid and the cleaning liquid off the rotating shaft 21, and the force between the second scraping blade 45 and the rotating shaft 21 is greater, so that the effect of removing the coating liquid and the cleaning liquid on the rotating shaft 21 by the second scraping blade 45 is improved.

[0061] With reference to Figure 7 The third scraping blade 47 is preferably arranged at a position close to the middle of the second side wall 15, and is in sliding connection with the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the rotating shaft 21. The third scraping blade 47 is arranged perpendicularly or obliquely to the outer circumferential surface 213 of the rotating shaft 21 and the second side surface 215 of the rotating shaft 21. In the embodiment, the extending direction of the third scraping blade 47 is the same as the rotating direction of the rotating shaft 21, which means that the third scraping blade 47 can wipe the coating liquid and the cleaning liquid off the rotating shaft 21, so that the rotating shaft 21 can be cleaned by the third scraping blade 47.

[0062] With reference to Figure 7The first solution tank 131, the second solution tank 132 and the third solution tank 133 can be arranged on the mounting bracket 1 and extend along the axial direction of the rotating shaft 21, the second solution tank 132 can be arranged near the middle of the bottom wall 13, and the first solution tank 131 and the third solution tank 133 can be arranged on the two sides of the second solution tank 132 respectively. The second solution tank 132 contains cleaning liquid, and part of the rotating shaft 21 can be soaked in the cleaning liquid in the second solution tank 132, so that the coating liquid on the rotating shaft 21 can be further removed. The first solution tank 131, the second solution tank 132 and the third solution tank 133 are relatively isolated, the cleaning liquid in the first solution tank 131, the second solution tank 132 and the third solution tank 133 can be neutralized with the coating liquid, so that the waste liquid in the first solution tank 131, the second solution tank 132 and the third solution tank 133 can reach the discharge standard, and the waste liquid can also avoid polluting the double-sided mask device 100.

[0063] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model without departing from the principles and purposes of the utility model, and all these changes should belong to the protection scope of the utility model claim.

Claims

1. A dual edge mask device, characterized by, The coating head is provided with discharge slots, and the double-sided mask device is arranged between adjacent discharge slots, and the double-sided mask device comprises: a mounting bracket; a rotating shaft assembly, the rotating shaft assembly comprises two rotating shafts, both of which are arranged on the mounting bracket, the rotating shaft comprises an outer circumferential surface and a first side surface and a second side surface at both ends of the rotating shaft, the outer circumferential surface of both rotating shafts is used for adhering the coating liquid extruded by the adjacent discharge slot, and both rotating shafts comprise a first rotating shaft and a second rotating shaft; a driving assembly, the driving assembly is connected with the two rotating shafts and drives the two rotating shafts to rotate synchronously.

2. The dual edge mask device of claim 1, wherein, The driving assembly comprises a driving mechanism, a synchronous belt and a synchronous wheel, both rotating shafts are connected with the synchronous wheel through a transmission shaft, and the driving mechanism drives the synchronous wheel to rotate through the synchronous belt, so that the synchronous wheel drives both rotating shafts to rotate synchronously.

3. The dual edge mask device of claim 1, wherein, Both rotating shafts are provided with a step portion at one end close to the substrate, and the step portion is arranged at the intersection of the outer circumferential surface of the rotating shaft and the second side surface of the rotating shaft.

4. The dual edge mask device of claim 1, wherein, It also comprises two cleaning assemblies, the cleaning assembly comprises a plurality of nozzles and a plurality of scrapers, a plurality of nozzles are arranged towards the outer circumferential surface of the rotating shaft, the nozzle is used for spraying cleaning liquid to the rotating shaft, a plurality of scrapers are used to remove the cleaning liquid and / or the coating liquid on the outer circumferential surface of the rotating shaft and the second side surface of the rotating shaft, and both cleaning assemblies comprise a first cleaning assembly and a second cleaning assembly for cleaning the first rotating shaft and the second rotating shaft respectively.

5. The dual edge mask device of claim 4, wherein, The scraper comprises a first scraping part and a second scraping part, the first scraping part is used to remove the cleaning liquid and / or the coating liquid on the outer circumferential surface of the rotating shaft, and the second scraping part is used to remove the cleaning liquid and / or the coating liquid on the second side surface of the rotating shaft.

6. The dual edge mask device of claim 4, wherein, The mounting bracket comprises a bottom wall, oppositely arranged first and second side walls and oppositely arranged third and fourth side walls, the bottom wall, the first side wall, the second side wall, the third side wall and the fourth side wall form an accommodating space, at least part of the first rotating shaft and at least part of the second rotating shaft are arranged in the accommodating space, the number of mounting brackets is two, and the two mounting brackets comprise a first mounting bracket and a second mounting bracket for mounting the first rotating shaft and the second rotating shaft respectively; A plurality of nozzles and a plurality of scrapers comprise a first nozzle, a first scraper, a second scraper, a second nozzle and a third scraper arranged in sequence along the circumferential direction of the rotating shaft, 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 circumferential direction of the rotating shaft is consistent with the rotating direction of the rotating shaft.

7. The dual edge mask device of claim 6, wherein, The first nozzle is arranged at a position close to the middle of the first side wall, and the number of first nozzles is multiple, and multiple first nozzles are uniformly distributed along the axial direction of the rotating shaft; The second nozzles are arranged near the middle of the second side wall, and the number of the second nozzles is multiple, and the multiple second nozzles are uniformly distributed along the axial direction of the rotating shaft.

8. The dual edge mask device of claim 6, wherein, The first scraping blade is arranged at the joint of the first side wall and the bottom wall, and is in sliding connection with the outer circumferential surface of the rotating shaft and the second side surface of the rotating shaft. The second scraping blade is arranged at the joint of the second side wall and the bottom wall, and is in sliding connection with the outer circumferential surface of the rotating shaft and the second side surface of the rotating shaft. The third scraping blade is arranged near the middle of the second side wall, and is in sliding connection with the outer circumferential surface of the rotating shaft and the second side surface of the rotating shaft.

9. The dual edge mask device of claim 6, wherein, The mounting bracket is provided with a first solution groove, a second solution groove and a third solution groove extending along the axial direction of the rotating shaft, the second solution groove is arranged near the middle of the bottom wall, and the first solution groove and the third solution groove are arranged on the two sides of the second solution groove respectively.

10. A coating apparatus characterized by comprising: The double-sided mask device and the coating head are arranged on the side of the substrate, and the coating head is provided with a plurality of discharge slots for coating the substrate, the length of the discharge slot is greater than the width of the substrate, and the double-sided mask device is arranged between adjacent discharge slots.

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