Diaphragm parallel coating equipment

Abstract

The utility model discloses diaphragm parallel coating equipment which comprises a first coating device, a second coating device and a reversing device, and the first coating device and the second coating device are arranged side by side front and back. Each of the first coating device and the second coating device comprises an unwinding mechanism, an A-side coating mechanism, a first drying oven, a B-side coating mechanism, a second drying oven, a discharge traction mechanism and a winding mechanism, and the winding mechanism, the unwinding mechanism, the A-side coating mechanism, the first drying oven and the B-side coating mechanism are sequentially arranged at intervals from left to right; the discharging traction mechanism is located above the unwinding mechanism and the A-face coating mechanism, the second drying oven is located above the first drying oven, and the reversing device comprises a first reversing mechanism, a second reversing mechanism and a transition mechanism. According to the utility model, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coating, and particularly relates to a diaphragm parallel coating device. Background Art

[0002] During the production process of the lithium battery diaphragm 100, it is usually necessary to coat, such as alumina, boehmite, polyvinylidene fluoride, etc. on the diaphragm 100 to improve the thermal shrinkage performance, adhesion with the positive and negative active materials of the diaphragm 100, etc. Currently, the existing diaphragm double-sided coater generally includes an unwinding mechanism for unwinding the diaphragm 100, a first coating mechanism for coating the A side (such as the front side) of the diaphragm 100 to form a coating 101, a first oven for heating and drying the coating 101 on the A side of the diaphragm 100, a second coating mechanism for coating the B side (such as the back side) of the diaphragm 100 to form a coating 101, a second oven for heating and drying the coating 101 on the B side of the diaphragm 100, and a winding mechanism for winding the diaphragm 100. This kind of diaphragm double-sided coater can only perform two coatings on the diaphragm 100 to form a coating 101 on each of the A side and the B side of the diaphragm 100, as Figure 1 shown. And when it is necessary to perform, for example, four coatings on the diaphragm 100 to form two coatings 101 on each of the A side and the B side of the diaphragm 100, as Figure 2 shown, it needs to be completed by two independent coaters, resulting in the need to increase production personnel and material transfer procedures, reducing production efficiency and increasing production costs. Summary of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a diaphragm parallel coating device, which can reduce the number of production personnel and material transfer procedures, greatly improve production efficiency, and reduce production costs.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A diaphragm parallel coating device includes a first coating device, a second coating device and a commutation device. The first coating device and the second coating device are arranged side by side front and back. The first coating device and the second coating device both include an unwinding mechanism, an A-side coating mechanism, a first oven, a B-side coating mechanism, a second oven, a discharging and traction mechanism and a winding mechanism. The winding mechanism, the unwinding mechanism, the A-side coating mechanism, the first oven and the B-side coating mechanism are arranged at intervals from left to right. The discharging and traction mechanism is located above the unwinding mechanism and the A-side coating mechanism. The second oven is located above the first oven. The commutation device includes a first commutation mechanism, a second commutation mechanism and a transition mechanism. The first commutation mechanism is arranged in the discharging and traction mechanism of the first coating device. The second commutation mechanism is arranged in the discharging and traction mechanism of the second coating device. The transition mechanism is located between the first commutation mechanism and the second commutation mechanism. One end of the transition mechanism is arranged in the discharging and traction mechanism of the first coating device, and the other end of the transition mechanism is arranged in the discharging and traction mechanism of the second coating device.

[0006] As a preferred technical solution, both the first coating device and the second coating device include a support platform. The unwinding mechanism, the A-side coating mechanism, the first oven and the B-side coating mechanism are all located within the support platform. The discharging and traction mechanism and the second oven are both arranged at the top of the support platform. The discharging and traction mechanism includes a discharging and traction platform arranged at the top of the support platform. A plurality of traction driving rollers are provided on the discharging and traction platform, and the plurality of traction driving rollers are arranged at intervals from right to left.

[0007] As a preferred technical solution, the first commutation mechanism and the second commutation mechanism are symmetrically arranged front and back. The first commutation mechanism and the second commutation mechanism both include a commutation frame and an air floating roller. The commutation frame of the first commutation mechanism is arranged in the discharging and traction platform of the first coating device. The commutation frame of the second commutation mechanism is arranged in the discharging and traction platform of the second coating device. The air floating roller is of a hollow structure. Two sealing plates are respectively provided at one end and the other end of the air floating roller. The two sealing plates are respectively arranged at the top of the commutation frame. One of the sealing plates is provided with a joint, and the joint is communicated with the inside of the air floating roller. The joint is connected to a blower. The outer peripheral surface of the air floating roller has a pore area, and a plurality of air outlet holes are uniformly distributed in the pore area. The plurality of air outlet holes are all communicated with the inside of the air floating roller.

[0008] As a preferred technical solution, the commutation frame has a first corner and a second corner arranged diagonally, and a third corner and a fourth corner arranged diagonally. Both the first corner and the third corner are close to the transition mechanism. The third corner is located between the first corner and the second oven. One end of the air float roller is close to the first corner and is located between the first corner and the third corner. The other end of the air float roller is close to the second corner and is located between the fourth corner and the second corner. The air hole area faces the fourth corner of the commutation frame.

[0009] As a preferred technical solution, the transition mechanism includes a transition platform. One end of the transition platform is arranged in the discharge and traction platform of the first coating device, and the other end of the transition platform is arranged in the discharge and traction platform of the second coating device. The transition platform is located between the commutation frames of the first commutation mechanism and the second commutation mechanism and is below the commutation frames of the first commutation mechanism and the second commutation mechanism. A plurality of transition rollers are provided on the transition platform, and the plurality of transition rollers are arranged at intervals in sequence from front to back.

[0010] As a preferred technical solution, a flattening frame is provided on one side of the commutation frame close to the transition platform. The flattening frame is located above the transition platform, and flattening rollers are provided on the flattening frame.

[0011] As a preferred technical solution, a roller frame is provided on one side of the commutation frame close to the second oven, and commutation rollers are provided on the roller frame.

[0012] As a preferred technical solution, both the A-side coating mechanism and the B-side coating mechanism of the first coating device include a coating frame, an intaglio roller, and two approaching rollers provided on the coating frame. The two approaching rollers are arranged side by side vertically. The intaglio roller is located on one side of the two approaching rollers and faces the two approaching rollers.

[0013] As a preferred technical solution, both the A-side coating mechanism and the B-side coating mechanism of the second coating device include a spraying frame, a spraying machine, an upper spraying roller, and a lower spraying roller provided on the spraying frame. The upper spraying roller and the lower spraying roller are arranged side by side vertically. The spraying machine is provided on one side of the upper spraying roller and the lower spraying roller and faces the upper spraying roller and the lower spraying roller.

[0014] As a preferred technical solution, both the first coating device and the second coating device include a preheating oven provided between the unwinding mechanism and the A-side coating mechanism, and a winding and traction mechanism provided between the winding mechanism and the unwinding mechanism. The preheating oven and the winding and traction mechanism are both located below the discharge and traction mechanism and are both located within the support platform.

[0015] The beneficial effects of the present utility model are as follows: By providing the first coating device, the second coating device and the commutation device, both the first coating device and the second coating device include an unwinding mechanism, an A-side coating mechanism, a first oven, a B-side coating mechanism, a second oven, an outgoing traction mechanism and a winding mechanism. The commutation device includes a first commutation mechanism, a second commutation mechanism and a transition mechanism. The first coating device can be used to coat the A side and the B side of the separator respectively to form a first coating and a second coating of the separator. The commutation device can lead the separator from the first coating device to the second coating device, so that the second coating device can coat the first coating and the second coating of the separator respectively to form a third coating and a fourth coating of the separator. In this way, four coatings can be realized for the separator. Compared with the prior art, the number of production personnel and the material transfer sequence can be reduced, the production efficiency can be greatly improved, and the production cost can be reduced. Description of the Drawings

[0016] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 It is a schematic structural diagram in which a coating is formed on each of the A side and the B side of the separator;

[0018] Figure 2 It is a schematic structural diagram in which two coatings are formed on each of the A side and the B side of the separator;

[0019] Figure 3 It is a top view schematic diagram of a separator parallel coating device provided by an embodiment of the present utility model;

[0020] Figure 4 It is Figure 3 A cross-sectional view of the first coating device, the first commutation mechanism, the second coating device and the second commutation mechanism of the separator parallel coating device shown;

[0021] Figure 5 It is Figure 4 A cross-sectional view of the unwinding mechanism, the preheating oven and the A-side coating mechanism of the first coating device shown;

[0022] Figure 6 It is Figure 4 A cross-sectional view of the B-side coating mechanism of the first coating device shown;

[0023] Figure 7 It is Figure 4 A cross-sectional view of the first commutation mechanism and the outgoing traction mechanism, the winding traction mechanism and the support platform part of the first coating device shown;

[0024] Figure 8 It is Figure 4 A cross-sectional view of the winding mechanism of the first coating device shown;

[0025] Figure 9 is Figure 4 A cross-sectional schematic view of the A-side coating mechanism of the second coating device shown;

[0026] Figure 10 is Figure 4 A cross-sectional schematic view of the B-side coating mechanism of the second coating device shown;

[0027] Figure 11 is Figure 4 A cross-sectional schematic view of the second commutation mechanism, the discharging traction mechanism, the winding traction mechanism, and the support platform part of the second coating device shown;

[0028] Figure 12 is Figure 3 A structural schematic view of the commutation device of the diaphragm parallel coating equipment shown;

[0029] Figure 13 is Figure 12 A structural schematic view of the second commutation mechanism of the commutation device shown;

[0030] Figure 14 is Figure 12 A structural schematic view of the transition mechanism of the commutation device shown. Detailed implementation manners

[0031] The concept, specific structure, and technical effects of the present utility model will be clearly and completely described below in conjunction with the embodiments and the drawings, so as to fully understand the purpose, features, and effects of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present utility model. In addition, all the connection / linkage relationships involved in the patent do not simply refer to the direct connection of components, but refer to the more optimal connection structure that can be formed by adding or reducing connection accessories according to the specific implementation situation. Each technical feature in the present utility model can be combined with each other without conflicting with each other.

[0032] Please refer to Figure 3 , a diaphragm parallel coating equipment provided by an embodiment of the present utility model includes a first coating device 10, a second coating device 20, and a commutation device 50. The first coating device 10 and the second coating device 20 are arranged side by side front and back.

[0033] Combined with Figure 4As shown in the figure, the first coating device 10 includes an unwinding mechanism 11, a preheating oven 12, an A-side coating mechanism 13, a first oven 14, a B-side coating mechanism 15, a second oven 16, an outgoing traction mechanism 17, a winding traction mechanism 18, a winding mechanism 19, and a support platform 21. The winding mechanism 19, the winding traction mechanism 18, the unwinding mechanism 11, the preheating oven 12, the A-side coating mechanism 13, the first oven 14, and the B-side coating mechanism 15 are arranged at intervals in sequence from left to right. The winding traction mechanism 18, the unwinding mechanism 11, the preheating oven 12, the A-side coating mechanism 13, the first oven 14, and the B-side coating mechanism 15 are all located inside the support platform 21. The outgoing traction mechanism 17 and the second oven 16 are both arranged at the top of the support platform 21. The outgoing traction mechanism 17 is located above the winding traction mechanism 18, the unwinding mechanism 11, the preheating oven 12, and the A-side coating mechanism 13. The outgoing traction mechanism 17 is located to the left of the second oven 16, and the second oven 16 is located above the first oven 14.

[0034] Combined with Figure 4 、 Figure 5 and Figure 6 As shown in the figure, the unwinding mechanism 11 is used to unwind the separator 100. The unwinding mechanism 11 includes an unwinding rack 111, an unwinding turret 112 arranged on the unwinding rack 111, and two unwinding shafts 113 arranged on the unwinding turret 112. The two unwinding shafts 113 are symmetric about the center of the unwinding turret 112. The unwinding turret 112 is used to drive the two unwinding shafts 113 to rotate around the center of the unwinding turret 112 to switch between workstations, so as to realize roll change. The unwinding shaft 113 is used to unwind the separator 100. In practical applications, for the convenience of description, the two unwinding shafts 113 are respectively named the first unwinding shaft 113 and the second unwinding shaft 113. For example, first install the first reel and the second reel wound with the separator 100 on the first unwinding shaft 113 and the second unwinding shaft 113 respectively, and then unwind the separator 100 on the first reel through the first unwinding shaft 113. When the separator 100 on the first reel is almost unwound, drive the first unwinding shaft 113 and the second unwinding shaft 113 to rotate around the center of the unwinding turret 112 through the unwinding turret 112 to switch between workstations, and then stick the advancing separator 100 to the pasting position of the separator 100 on the second reel, and then cut it off. In this way, the tape connection is completed, and then the separator 100 on the second reel can be unwound through the second unwinding shaft 113.

[0035] It can be understood that in other embodiments, it may also be that the unwinding mechanism 11 includes an unwinding rack 111 and an unwinding roller arranged on the unwinding rack 111, and the unwinding roller is used to unwind the separator 100.

[0036] The preheating oven 12 is used to preheat the separator 100 to flatten the separator 100, avoid wrinkles and other conditions of the separator 100, and improve the coating quality. The preheating oven 12 is an existing hot air oven, including a preheating box body 121. Both ends of the preheating box body 121 are open to allow the separator 100 to enter the preheating box body 121 and to allow the separator 100 to come out of the preheating box body 121. Inside the preheating box body 121, there are multiple upper conveying rollers 122, multiple lower conveying rollers 123 for conveying the separator 100, and a lower hull. The multiple upper conveying rollers 122 are located above the multiple lower conveying rollers 123 and are arranged alternately up and down with the multiple lower conveying rollers 123. The multiple upper conveying rollers 122 and the multiple lower conveying rollers 123 are used to convey the separator 100. The number of the upper conveying rollers 122 and the lower conveying rollers 123 can be set according to the actual situation. The lower hull is located below the multiple lower conveying rollers 123, and the top end of the lower hull is provided with mesh holes communicating with the inside of the lower hull. Through the mesh holes, hot air can be blown on the separator 100 to preheat the separator 100. The preheating box body 121 is provided with an air inlet. The air inlet is connected to a hot air blower through a first pipeline and is connected to the inside of the lower hull through a second pipeline. In actual application, the separator 100 can be conveyed by the multiple upper conveying rollers 122 and the multiple lower conveying rollers 123. The hot air generated by the hot air blower can enter the lower hull through the air inlet of the preheating box body and then be blown out through the mesh holes of the lower hull. In this way, the preheating of the separator 100 can be achieved. The upper conveying rollers 122 and the lower conveying rollers 123 are of the same type of roller.

[0037] Understandably, the preheating oven 12 can also be other types of ovens, such as an infrared oven, etc.

[0038] The A-side coating mechanism 13 is used to coat the A side of the separator 100 to form the first coating of the separator 100. The A side of the separator 100 is, for example, the front side of the separator 100.

[0039] The A-side coating mechanism 13 is a microgravure coating mechanism. The A-side coating mechanism 13 includes a coating rack 131, a gravure roller 132 arranged on the coating rack 131, and two approaching rollers 133 arranged on the coating rack 131. The two approaching rollers 133 are arranged side by side up and down. The gravure roller 132 is located on one side of the two approaching rollers 133, for example, on the left side of the two approaching rollers 133. The gravure roller 132 faces the two approaching rollers 133. The two approaching rollers 133 are used to press the separator 100 against the gravure roller 132, and the gravure roller 132 is used to coat the A side of the separator 100.

[0040] Further, the A-side coating mechanism 13 further includes two coating adsorption rollers 134. Both of the two coating adsorption rollers 134 are arranged on the coating rack 131. One of the coating adsorption rollers 134 is located below the gravure roll 132 and the two approaching rollers 133, and the other coating adsorption roller 134 is located above the gravure roll 132 and the two approaching rollers 134. The two coating adsorption rollers 134 are respectively used for adsorbing the separator 100 to achieve the interruption of the tension of the separator 100, facilitating the coating of the A side of the separator 100.

[0041] The first oven 14 is used for heating and drying the first coating of the separator 100.

[0042] The B-side coating mechanism 15 is used for coating the B side of the separator 100 to form the second coating of the separator 100. The B side of the separator 100 is, for example, the back side of the separator 100. The B-side coating mechanism 15 is a micro-gravure coating mechanism. The structure of the B-side coating mechanism 15 is the same as that of the A-side coating mechanism 13, and also includes a coating rack 131, a gravure roll 132 arranged on the coating rack 131, two approaching rollers 133 arranged on the coating rack 131, and two coating adsorption rollers 134 arranged on the coating rack 131. Among them, the gravure roll 132 of the B-side coating mechanism 15 is located to the right of the two approaching rollers 133. The gravure roll 132 of the B-side coating mechanism 15 is used for coating the B side of the separator 100. The two coating adsorption rollers 134 of the B-side coating mechanism 15 are respectively used for adsorbing the separator 100 to achieve the interruption of the tension of the separator 100, facilitating the coating of the B side of the separator 100.

[0043] The second oven 16 is used for heating and drying the second coating of the separator 100. In this embodiment, both the first oven 14 and the second oven 16 are existing hot air ovens. It can be understood that the first oven 14 and the second oven 16 can also be other types of ovens, such as infrared ovens, etc. Both the first oven 14 and the second oven 16 include a heating chamber 141, such as Figure 4As shown, there are multiple heating chambers 141 in this embodiment, for example, five. The five heating chambers 141 are connected in sequence from left to right. It can be understood that the number of heating chambers 141 can be set according to the actual situation. The heating chambers 141 of the second oven 16 are arranged at the top of the support platform 21. Both ends of the heating chamber 141 are open to allow the diaphragm 100 to enter and exit the heating chamber 141. Inside the heating chamber 141, there are multiple idlers 142, a hull, and multiple air nozzles. The multiple idlers 142 are arranged at intervals from left to right. The multiple idlers 142 are used to convey the diaphragm 100, and the number of idlers 142 can be set according to the actual situation. The hull is located above the multiple idlers 142. The multiple air nozzles are arranged at intervals from left to right at the bottom of the hull. The multiple air nozzles are all communicated with the inside of the hull, and the number of air nozzles can be set according to the actual situation. The multiple air nozzles of the first oven 14 are respectively used to blow hot air onto the A side of the diaphragm 100 to heat and dry the first coating of the diaphragm 100. The multiple air nozzles of the second oven 16 are respectively used to blow hot air onto the B side of the diaphragm 100 to heat and dry the second coating of the diaphragm 100. An air inlet is provided on the heating chamber 141. The air inlet is connected to a hot air blower through a first pipeline and is also communicated with the inside of the hull through a second pipeline. In actual application, the diaphragm 100 can be conveyed through the multiple idlers 142. The hot air generated by the hot air blower can enter the hull through the air inlet of the heating chamber 141 and then be blown out through the air nozzles, so that the coating on the corresponding side of the diaphragm 100 can be heated and dried.

[0044] Combined with Figure 4 and Figure 7 As shown, the discharging and traction mechanism 17 is used to traction the diaphragm 100. The discharging and traction mechanism 17 includes a discharging and traction platform 171 arranged at the top of the support platform 21. Multiple traction driving rollers 172 are provided on the discharging and traction platform 171. The multiple traction driving rollers 172 are arranged at intervals from right to left. The traction driving rollers 172 are used to traction the diaphragm 100, and the number of traction driving rollers 172 can be set according to the actual situation.

[0045] In this embodiment, the discharging and traction platform 171 includes a platform body 1711 and multiple, for example, two support column groups. The multiple traction driving rollers 172 described above are provided on the platform body 1711. The two support column groups are arranged side by side front and back. Each support column group includes multiple, for example, five support columns 1712. The five support columns 1712 are arranged at intervals from left to right at the top of the support platform 21. The platform body 1711 is arranged at the top of the five support columns 1712 of the two support column groups. It can be understood that the number of support column groups and the number of support columns 1712 in each support column group can be set according to the actual situation.

[0046] The rewinding traction mechanism 18 is used to traction the diaphragm 100, facilitating the rewinding of the diaphragm 100 by the rewinding mechanism 19. The rewinding traction mechanism 18 includes a traction frame 181 and a first traction roller 182, a second traction roller 183, and a third traction roller 184 disposed on the traction frame 181. The second traction roller 183 is located above the first traction roller 182, and the third traction roller 184 is located on one side (e.g., the left side) between the first traction roller 182 and the second traction roller 183. The first traction roller 182, the second traction roller 183, and the third traction roller 184 are respectively used to traction the diaphragm 100.

[0047] Further, the rewinding traction mechanism 18 further includes a traction adsorption roller 185, and the traction adsorption roller 185 is disposed on the traction frame 181. The traction adsorption roller 185 is located below the first traction roller 182. The traction adsorption roller 185 is used to adsorb the diaphragm 100 to cut off the tension of the diaphragm 100, facilitating the rewinding of the diaphragm 100 by the rewinding mechanism 19.

[0048] Combined Figure 8 As shown, the rewinding mechanism 19 is used to wind the diaphragm 100. The rewinding mechanism 19 includes a rewinding frame 191, a rewinding turret 192 disposed on the rewinding frame 191, and two rewinding shafts 193 disposed on the rewinding turret 192. The two rewinding shafts 193 are symmetric about the center of the rewinding turret 192. The rewinding turret 192 is used to drive the two rewinding shafts 193 to rotate around the center of the unwinding turret 192 to switch the working positions with each other, thereby realizing roll change. The rewinding shaft 193 is used to wind the diaphragm 100. In practical applications, for the convenience of description, the two rewinding shafts 193 are respectively named the first rewinding shaft 193 and the second rewinding shaft 193. For example, two empty first drums and second drums are respectively installed on the first rewinding shaft 193 and the second rewinding shaft 193, and then the first rewinding shaft 193 is used to wind the diaphragm 100 so that the diaphragm 100 is wound around the first drum. When the first drum is almost full, the rewinding turret 192 drives the first rewinding shaft 193 and the second rewinding shaft 193 to rotate around the center of the rewinding turret 192 to switch the working positions with each other, and then the advancing diaphragm 100 is closely attached to the gluing position on the second drum, and then cut off. In this way, the tape connection is completed, and then the second rewinding shaft 193 can be used to wind the diaphragm 100 so that the diaphragm 100 is wound around the second drum.

[0049] It can be understood that in other embodiments, it may also be that the rewinding mechanism 19 includes a rewinding frame 191 and a rewinding roller disposed on the rewinding frame 191, and the rewinding roller is used to wind the diaphragm 100.

[0050] The structure of the second coating device 20 is the same as that of the first coating device 10, and also includes an unwinding mechanism 11, a preheating oven 12, an A-side coating mechanism 13, a first oven 14, a B-side coating mechanism 15, a second oven 16, an outgoing traction mechanism 17, a winding traction mechanism 18, a winding mechanism 19, and a support platform 21. Among them, the A-side coating mechanism 13 of the second coating device 20 is used to coat the first coating of the separator 100 to form the third coating of the separator 100. The first oven 14 of the second coating device 20 is used to heat and dry the third coating of the separator 100. The B-side coating mechanism 15 of the second coating device 20 is used to coat the second coating of the separator 100 to form the fourth coating of the separator 100. The second oven 16 is used to heat and dry the fourth coating of the separator 100. The A-side coating mechanism 13 of the second coating device 20 is a spraying mechanism, such as Figure 9 shown. The A-side coating mechanism 13 of the second coating device 20 includes a spraying frame 136, a spraying machine, an upper spraying over-roller 138 and a lower spraying over-roller 137 arranged on the spraying frame 136. The upper spraying over-roller 138 and the lower spraying over-roller 137 are arranged side by side vertically. The spraying machine is arranged on one side of the upper spraying over-roller 138 and the lower spraying over-roller 137, for example, on the left side of the upper spraying over-roller 138 and the lower spraying over-roller 137. The spraying machine faces the upper spraying over-roller 138 and the lower spraying over-roller 137. The upper spraying over-roller 138 and the lower spraying over-roller 138 are respectively used to support the separator 100 to form a spraying path. The spraying machine is used to spray the first coating of the separator 100 to achieve coating of the first coating of the separator 100.

[0051] Furthermore, the A-side coating mechanism 13 of the second coating device 20 further includes a spraying adsorption roller 139. The spraying adsorption roller 139 is arranged on the spraying frame 136. The spraying adsorption roller 139 is located below the lower spraying over-roller 137 and to the right of the lower spraying over-roller 137. The spraying adsorption roller 139 is used to adsorb the separator 100 to cut off the tension of the separator 100, facilitating coating of the first coating of the separator 100.

[0052] The B-side coating mechanism 15 of the second coating device 20 is also a spraying mechanism, such as Figure 10As shown, the structure of the B-side coating mechanism 15 of the second coating device 20 is the same as that of the A-side coating mechanism 13 of the second coating device 20. Among them, the spraying machine of the B-side coating mechanism 15 of the second coating device 20 is arranged to the right of the upper spraying over-roller 138 and the lower spraying over-roller 137. The spraying machine of the B-side coating mechanism 15 of the second coating device 20 is used to spray the second coating of the separator 100 to achieve coating of the second coating of the separator 100. The spraying and adsorption roller 139 of the B-side coating mechanism 15 of the second coating device 20 is located below and to the left of the lower spraying over-roller 137 of the B-side coating mechanism 15 of the second coating device 20. The spraying and adsorption roller 139 of the B-side coating mechanism 15 of the second coating device 20 is used to adsorb the separator 100 to achieve interruption of the tension of the separator 100, facilitating coating of the second coating of the separator 100.

[0053] It can be understood that in the first replacement scheme, both the A-side coating mechanism 13 and the B-side coating mechanism 15 of the second coating device 20 are micro gravure coating mechanisms, and both the A-side coating mechanism 13 and the B-side coating mechanism 15 of the first coating device 10 are spraying mechanisms. In the second replacement scheme, the A-side coating mechanism 13, the B-side coating mechanism 15 of the first coating device 10, and the A-side coating mechanism 13 and the B-side coating mechanism 15 of the second coating device 20 are all micro gravure coating mechanisms. In the third replacement scheme, the A-side coating mechanism 13, the B-side coating mechanism 15 of the first coating device 10, and the A-side coating mechanism 13 and the B-side coating mechanism 15 of the second coating device 20 are all spraying mechanisms. It can be understood that the specific type of coating mechanism adopted by the A-side coating mechanism 13 and the B-side coating mechanism 15 can be set according to the actual situation.

[0054] Combined with Figure 4 、 Figure 7 、 Figures 11 to 14 As shown, the reversing device 50 is used to guide the separator 100 from the first coating device 10 to the second coating device 20. The reversing device 50 includes a first reversing mechanism 51, a second reversing mechanism 52, and a transition mechanism 53.

[0055] The first reversing mechanism 51 is arranged in the discharging and traction mechanism 17 of the first coating device 10, and the second reversing mechanism 52 is arranged in the discharging and traction mechanism 17 of the second coating device 20. The transition mechanism 53 is located between the first reversing mechanism 51 and the second reversing mechanism 52. One end of the transition mechanism 53 is arranged in the discharging and traction mechanism 17 of the first coating device 10, and the other end of the transition mechanism 53 is arranged in the discharging and traction mechanism 17 of the second coating device 20.

[0056] Specifically, the first commutation mechanism 51 and the second commutation mechanism 52 are symmetrically arranged front and back. The structures of the first commutation mechanism 51 and the second commutation mechanism 52 are the same, and both include a commutation frame 511 and an air-floating roller 512. The commutation frame 511 of the first commutation mechanism 51 is arranged in the discharge traction platform 171 of the first coating device 10, and the commutation frame 511 of the second commutation mechanism 52 is arranged in the discharge traction platform 171 of the second coating device 20. The commutation frame 511 is a square structure. The commutation frame 511 has a first corner 511a and a second corner arranged diagonally, and a third corner and a fourth corner 511d arranged diagonally. The first corner 511a and the third corner are close to the transition mechanism 53, and the third corner is located between the first corner 511a and the second oven 16. The air-floating roller 512 is a hollow structure. The length direction of the air-floating roller 512 is cross-set with the center line of the length direction of the commutation frame 511. One end of the air-floating roller 512 is close to the first corner 511a and is located between the first corner 511a and the third corner. The other end of the air-floating roller 512 is close to the second corner and is located between the fourth corner 511d and the second corner. Two sealing plates 5122 are respectively provided at one end and the other end of the air-floating roller 512. The two sealing plates 5122 are respectively arranged at the top of the commutation frame 511. One of the sealing plates 5122, for example, the sealing plate 5122 close to the first corner of the commutation frame 511, is provided with a joint. The joint is communicated with the inside of the air-floating roller 512. The joint is connected to a blower 5124 through a connecting pipe 5123. Among them, the blower 5124 of the first commutation mechanism 51 is arranged at the top of the support platform 21 of the first coating device 10, and the blower 5124 of the second commutation mechanism 52 is arranged at the top of the support platform 21 of the second coating device 20. The outer peripheral surface of the air-floating roller 512 has a pore area. The pore area faces the fourth corner 511d of the commutation frame 511 and is evenly distributed with a plurality of air outlet holes 5121. The plurality of air outlet holes 5121 are all communicated with the inside of the air-floating roller 512. The number and size of the air outlet holes 5121 can be set according to actual situations. The air-floating roller 512 is used for suspending and supporting the diaphragm 100 to avoid direct contact with the diaphragm 100, so as not to damage the diaphragm 100 and ensure the coating quality. The commutation frame 511 plays a role in installing and supporting the air-floating roller 512. In actual application, when the diaphragm 100 passes through the pore area of the air-floating roller 512, air can be blown into the inside of the air-floating roller 512 through the blower 5124, the connecting pipe 5123 and the joint. Then the air flows out from a plurality of air outlet holes 5121. The air flowing out from the plurality of air outlet holes 5121 can form a highly rigid and uniform air film on the outer peripheral surface of the air-floating roller 512. Through this air film, the diaphragm 100 can be lifted up to make the diaphragm 100 suspended, so as to realize the suspended support of the diaphragm 100.

[0057] In this embodiment, as Figure 7 , Figure 11As shown in the figure, a base 1713 is provided inside the discharging and traction platform 171. The base 1713 is located below the platform body 1711. One end of the base 1713 is connected to two of the support columns 1712 at the front of the discharging and traction platform 171, and the other end of the base 173 is connected to two of the support columns 1712 at the rear of the discharging and traction platform 171. The reversing frame 511 is arranged at the top of the base 1713.

[0058] The transition mechanism 53 is used to support the diaphragm 100. The transition mechanism 53 includes a transition platform 531. One end of the transition platform 531 is arranged inside the discharging and traction platform 171 of the first coating device 10, and the other end of the transition platform 531 is arranged inside the discharging and traction platform 171 of the second coating device 20. In this embodiment, the transition platform 531 is located between the base 1713 inside the discharging and traction platform 171 of the first coating device 10 and the base 1713 inside the discharging and traction platform 171 of the second coating device 20. Both ends of the transition platform 531 are respectively connected to the base 1713 inside the discharging and traction platform 171 of the first coating device 10 and the base 1713 inside the discharging and traction platform 171 of the second coating device 20. The transition platform 531 is located between the reversing frames 511 of the first reversing mechanism 51 and the second reversing mechanism 52 and is below the reversing frames 511 of the first reversing mechanism 51 and the second reversing mechanism 52. A plurality of transition rollers 532 are provided on the transition platform 531. The plurality of transition rollers 532 are arranged at intervals in sequence from front to back. The transition rollers 532 are used to support the diaphragm 100. The number of the transition rollers 532 can be set according to the actual situation.

[0059] Furthermore, a flattening frame 513 is provided on one side of the reversing frame 511 close to the transition platform 531. The flattening frame 513 is located above the transition platform 531, and a flattening roller 514 is provided on the flattening frame 513. The flattening roller 514 is used to flatten the diaphragm 100 to avoid situations such as wrinkles of the diaphragm 100, thereby improving the coating quality.

[0060] Furthermore, a roller frame 515 is provided on one side of the reversing frame 511 close to the second oven 16, and a reversing roller 516 is provided on the roller frame 515. The reversing roller 516 is used to support the diaphragm 100. In this embodiment, there are two reversing rollers 516 of the first reversing mechanism 51, and the two reversing rollers 516 are arranged side by side vertically. There is one reversing roller 516 of the second reversing mechanism 52. It can be understood that the number of the reversing rollers 516 can be set according to the actual situation.

[0061] With the above structure, when the present utility model actually performs four coatings on the diaphragm 100, except that the winding mechanism 19, the winding traction mechanism 18 of the first coating device 10, the unwinding mechanism 11, and the preheating oven 12 of the second coating device 20 are not turned on, the remaining mechanisms of the first coating device 10, the remaining mechanisms of the second coating device 20, and the commutation device 50 are all turned on: such as Figure 4As shown, first, the unwinding mechanism 11 of the first coating device 10 unwinds the separator 100. The unwound separator 100 first enters the preheating chamber 121 of the preheating oven 12 of the first coating device 10 and passes over multiple upper conveying rollers 122 and multiple lower conveying rollers 123, so as to convey the separator 100 through the multiple upper conveying rollers 122 and multiple lower conveying rollers 123. The hot air blown out through the mesh holes of the lower hull of the preheating oven 12 of the first coating device 10 can preheat the separator 100. Then it comes out of the preheating chamber 121 of the preheating oven 12 of the first coating device 10 and successively passes over the lower coating adsorption roller 134 of the A-side coating mechanism 13 of the first coating device 10, between the gravure roller 132 and the two approaching rollers 133, and over the upper coating adsorption roller 134. The two approaching rollers 133 of the A-side coating mechanism 13 of the first coating device 10 can press the separator 100 against the gravure roller 132 of the A-side coating mechanism 13 of the first coating device 10 to coat the A side of the separator 100 through the gravure roller 132, so as to form the first coating of the separator 100. Then the separator 100 enters the heating chamber 141 of the first oven 14 of the first coating device 10 and passes over multiple supporting rollers 142, so as to convey the separator 100 through the multiple supporting rollers 142. The air nozzles of the first oven 14 of the first coating device 10 can heat and dry the first coating of the separator 100. Then the separator 100 comes out of the heating chamber 141 of the first oven 14 of the first coating device 10 and successively passes over the lower coating adsorption roller 134 of the B-side coating mechanism 15 of the first coating device 10, between the gravure roller 132 and the two approaching rollers 133, and over the upper coating adsorption roller 134. The two approaching rollers 133 of the B-side coating mechanism 15 of the first coating device 10 can press the separator 100 against the gravure roller 132 of the B-side coating mechanism 15 of the first coating device 10 to coat the B side of the separator 100 through the gravure roller 132, so as to form the second coating of the separator 100. Then the separator 100 enters the heating chamber 141 of the second oven 16 of the first coating device 10 and passes over multiple supporting rollers 142, so as to convey the separator 100 through the multiple supporting rollers 142. The air nozzles of the second oven 16 of the first coating device 10 can heat and dry the second coating of the separator 100. Then the separator 100 comes out of the heating chamber 141 of the second oven 16 of the first coating device 10 and passes over the driving traction roller 172 of a part of the discharging and traction mechanism 17 of the first coating device 10. Then the separator 100 successively passes over the reversing roller 516 of the first reversing mechanism 51, through the air hole area of the air floating roller 512 of the first reversing mechanism 51, and over the flattening roller 514 of the first reversing mechanism 51, as Figure 12As shown, the diaphragm 100 then passes over multiple transition rollers 532 of the transition mechanism 53, over the flattening roller 514 of the second reversing mechanism 52, through the pore area of the air flotation roller 512 of the second reversing mechanism 52, and over the reversing roller 516 of the second reversing mechanism 52. Then the diaphragm 100 passes over the spraying and adsorption roller 139, the lower spraying roller 137, and the upper spraying roller 138 of the A-side coating mechanism 13 of the second coating device 20 in sequence. Through the spraying machine of the A-side coating mechanism 13 of the second coating device 20, the first coating of the diaphragm 100 can be coated to form the third coating of the diaphragm 100. Then the diaphragm 100 enters the heating chamber 141 of the first oven 14 of the second coating device 20 and passes over multiple supporting rollers 142 to convey the diaphragm 100 through the multiple supporting rollers 142. Through the nozzles of the first oven 14 of the second coating device 20, the third coating of the diaphragm 100 can be heated and dried. Then the diaphragm 100 exits from the heating chamber 141 of the first oven 14 of the second coating device 20 and passes over the spraying and adsorption roller 139, the lower spraying roller 137, and the upper spraying roller 138 of the B-side coating mechanism 15 of the second coating device 20 in sequence. Through the spraying machine of the B-side coating mechanism 15 of the second coating device 20, the second coating of the diaphragm 100 can be coated to form the fourth coating of the diaphragm 100. Then the diaphragm 100 enters the heating chamber 141 of the second oven 16 of the second coating device 20 and passes over multiple supporting rollers 142 to convey the diaphragm 100 through the multiple supporting rollers 142. Through the nozzles of the second oven 16 of the second coating device 20, the fourth coating of the diaphragm 100 can be heated and dried. Then the diaphragm 100 exits from the heating chamber 141 of the second oven 16 of the second coating device 20 and passes over multiple driving traction rollers 172 of the discharging traction mechanism 17 of the second coating device 20, and over the second traction roller 183, the third traction roller 184, the first traction roller 182, and the traction adsorption roller 182 of the winding traction mechanism 18 of the second coating device 20. Then the diaphragm 100 is wound by the winding mechanism 19 of the second coating device 20.

[0062] In addition, with the above structure, the present utility model can also achieve single coating, double coating, and triple coating of the diaphragm.

[0063] When actually performing a single coating on the separator 100, for example, the first coating device 10 and the commutation device 50 are not turned on. Except for the sprayer of the B-side coating mechanism 15 and the hot air blower of the second oven 16 in the second coating device 20, the rest of the mechanisms are turned on. At this time, the B-side coating mechanism 15 and the second oven 16 of the second coating device 20 only serve to convey the separator 100: First, the separator 100 is unrolled by the unrolling mechanism 11 of the second coating device 20. The unrolled separator 100 first enters the preheating chamber 121 of the preheating oven 12 of the second coating device 20 and passes over multiple upper conveying rollers 122 and multiple lower conveying rollers 123, so as to convey the separator 100 through the multiple upper conveying rollers 122 and multiple lower conveying rollers 123. The hot air blown out through the mesh holes of the lower hull of the preheating oven 12 of the second coating device 20 can preheat the separator 100. Then the separator 100 exits from the preheating chamber 121 of the preheating oven 12 of the second coating device 20 and passes over the spray adsorption roller 139, the lower spray passing roller 137, and the upper spray passing roller 138 of the A-side coating mechanism 13 of the second coating device 20 in sequence. The sprayer of the A-side coating mechanism 13 of the second coating device 20 can coat the A side of the separator 100 to form a coating on the separator 100. Then the separator 100 enters the heating chamber 141 of the first oven 14 of the second coating device 20 and passes over multiple supporting rollers 142, so as to convey the separator 100 through the multiple supporting rollers 142. The air nozzles of the first oven 14 of the second coating device 20 can heat and dry the coating on the separator 100. Then the separator 100 passes over the spray adsorption roller 139, the lower spray passing roller 137, and the upper spray passing roller 138 of the B-side coating mechanism 15 of the second coating device 20 in sequence. Then the separator 100 enters the heating chamber 141 of the second oven 16 of the second coating device 20 and passes over multiple supporting rollers 142, so as to convey the separator 100 through the multiple supporting rollers 142. Then the separator 100 exits from the heating chamber 141 of the second oven 16 of the second coating device 20 and passes over multiple traction driving rollers 172 of the discharging traction mechanism 17. Then the separator 100 passes over the second traction roller 183, the third traction roller 184, the first traction roller 182, and the traction adsorption roller 185 of the winding traction mechanism 18 of the second coating device 20, and then the separator 100 is wound by the winding mechanism 19 of the second coating device 20.

[0064] Understandably, another way is to perform a single coating on the separator 100, that is, the second coating device 20 and the reversing device 50 are not turned on. Except for the gravure roll 132 of the B-side coating mechanism 15 of the first coating device 10 and the hot air blower of the second oven 16 not being turned on, all other mechanisms are turned on. At this time, the B-side coating mechanism 15 of the first coating device 10 and the second oven 16 only serve to convey the separator 100. The walking path of the separator 100 is as follows: the unwind mechanism 11 of the first coating device 10, the preheating oven 12 of the first coating device 10, the A-side coating mechanism 13 of the first coating device 10, the first oven 14 of the first coating device 10, the B-side coating mechanism 15 of the first coating device 10, the second oven 16 of the first coating device 10, the discharging traction mechanism 17 of the first coating device 10, the winding traction mechanism 18 of the first coating device 10, and the winding mechanism 19 of the first coating device 10. Through these mechanisms, a single coating on the separator 100 can be achieved.

[0065] When actually applying two coatings to the separator 100, for example, the first coating device 10 and the reversing device 50 are not turned on, and the second coating device 20 is turned on: First, the separator 100 is unrolled through the unrolling mechanism 11 of the second coating device 20. The unrolled separator 100 first enters the preheating chamber 121 of the preheating oven 12 of the second coating device 20 and passes over multiple upper conveying rollers 122 and multiple lower conveying rollers 123, so as to convey the separator 100 through the multiple upper conveying rollers 122 and multiple lower conveying rollers 123. The hot air blown out through the mesh holes of the lower hull of the preheating oven 12 of the second coating device 20 can preheat the separator 100. Then it comes out of the preheating chamber 121 of the preheating oven 12 of the second coating device 20 and successively passes over the spraying and adsorption roller 139, the lower spraying roller 137, and the upper spraying roller 138 of the A-side coating mechanism 13 of the second coating device 20. The spraying machine of the A-side coating mechanism 13 of the second coating device 20 can coat the A side of the separator 100 to form the first coating of the separator 100. Then the separator 100 enters the heating chamber 141 of the first oven 14 of the second coating device 20 and passes over multiple supporting rollers 142, so as to convey the separator 100 through the multiple supporting rollers 142. The air nozzles of the first oven 14 of the second coating device 20 can heat and dry the first coating of the separator 100. Then the separator 100 comes out of the heating chamber 141 of the first oven 14 of the second coating device 20 and successively passes over the spraying and adsorption roller 139, the lower spraying roller 137, and the upper spraying roller 138 of the B-side coating mechanism 15 of the second coating device 20. The spraying machine of the B-side coating mechanism 15 of the second coating device 20 can coat the B side of the separator 100 to form the second coating of the separator 100. Then the separator 100 enters the heating chamber 141 of the second oven 16 of the second coating device 20 and passes over multiple supporting rollers 142, so as to convey the separator 100 through the multiple supporting rollers 142. The air nozzles of the second oven 16 of the second coating device 20 can heat and dry the second coating of the separator 100. Then the separator 100 comes out of the heating chamber 141 of the second oven 16 of the second coating device 20 and passes over multiple driving traction rollers 172 of the discharging traction mechanism 17 of the second coating device 20. Then the separator 100 passes over the second traction roller 183, the third traction roller 184, the first traction roller 182, and the traction adsorption roller 185 of the winding traction mechanism 18 of the second coating device 20, and then the separator 100 is wound by the winding mechanism 19 of the second coating device 20.

[0066] Understandably, another way to double coat the separator 100, i.e., double-sided coating, is that the second coating device 20 and the reversing device 50 are not turned on, and the first coating device 10 is turned on. At this time, the running path of the separator is: the unwinding mechanism 11 of the first coating device 10, the preheating oven 12 of the first coating device 10, the A-side coating mechanism 13 of the first coating device 10, the first oven 14 of the first coating device 10, the B-side coating mechanism 15 of the first coating device 10, the second oven 16 of the first coating device 10, the discharging traction mechanism 17 of the first coating device 10, the winding traction mechanism 18 of the first coating device 10, and the winding mechanism 19 of the first coating device 10. Through these mechanisms, double coating of the separator 100 can be achieved.

[0067] When actually coating the diaphragm 100 three times, except for the winding mechanism 19, winding traction mechanism 18 of the first coating device 20, and the unwinding mechanism 11, preheating oven 12, sprayer of the B-side coating mechanism 15, and hot air blower of the second oven 16 of the second coating device 20 which are not turned on, all other mechanisms are turned on. At this time, the B-side coating mechanism 15 and the second oven 16 of the second coating device 20 only serve to convey the diaphragm 100: First, the unwinding mechanism 11 of the first coating device 10 unwinds the diaphragm 100. The unwound diaphragm 100 first enters the preheating chamber 121 of the preheating oven 12 of the first coating device 20 and passes over multiple upper conveying rollers 122 and multiple lower conveying rollers 123 to convey the diaphragm 100 through the multiple upper conveying rollers 122 and multiple lower conveying rollers 123. The hot air blown out through the mesh holes of the lower hull of the preheating oven 12 of the first coating device 10 can preheat the diaphragm 100. Then it comes out of the preheating chamber 121 of the preheating oven 12 of the first coating device 20 and successively passes over the lower coating adsorption roller 134 of the A-side coating mechanism 13 of the first coating device 10, between the gravure roller 132 and the two approaching rollers 133, and over the upper coating adsorption roller 134. The two approaching rollers 133 of the A-side coating mechanism 13 of the first coating device 10 can press the diaphragm 100 against the gravure roller 132 of the A-side coating mechanism 13 of the first coating device 10 to coat the A side of the diaphragm 100 through the gravure roller 132 to form the first coating of the diaphragm 100. Then the diaphragm 100 enters the heating chamber 141 of the first oven 14 of the first coating device 10 and passes over multiple carrier rollers 142 to convey the diaphragm 100 through the multiple carrier rollers 142. The air nozzles of the first oven 14 of the first coating device 10 can heat and dry the first coating of the diaphragm 100. Then the diaphragm 100 comes out of the heating chamber 141 of the first oven 14 of the first coating device 10 and successively passes over the lower coating adsorption roller 134 of the B-side coating mechanism 15 of the first coating device 10, between the gravure roller 132 and the two approaching rollers 133, and over the upper coating adsorption roller 134. The two approaching rollers 133 of the B-side coating mechanism 15 of the first coating device 10 can press the diaphragm 100 against the gravure roller 132 of the B-side coating mechanism 15 of the first coating device 10 to coat the B side of the diaphragm 100 through the gravure roller 132 to form the second coating of the diaphragm 100. Then the diaphragm 100 enters the heating chamber 141 of the second oven 16 of the first coating device 10 and passes over multiple carrier rollers 142 to convey the diaphragm 100 through the multiple carrier rollers 142. The air nozzles of the second oven 16 of the first coating device 10 can heat and dry the second coating of the diaphragm 100.Then the separator 100 exits from the heating chamber 141 of the second oven 16 of the first coating device 10 and passes over the driving roller 172 of a part of the discharging and pulling mechanism 17 of the first coating device 10. Then the separator 100 passes over the reversing roller 516 of the first reversing mechanism 51, passes through the air hole area of the air floating roller 512 of the first reversing mechanism 51, and passes over the flattening roller 514 of the first reversing mechanism 51, as. Figure 12 As shown, then the separator 100 passes over the plurality of transition rollers 532 of the transition mechanism 53, passes over the flattening roller 514 of the second reversing mechanism 52, passes through the air hole area of the air floating roller 512 of the second reversing mechanism 52, and passes over the reversing roller 516 of the second reversing mechanism 52. Then the separator 100 successively passes over the spraying and adsorption roller 139, the lower spraying roller 137, and the upper spraying roller 138 of the A-side coating mechanism 13 of the second coating device 20. The spraying machine of the A-side coating mechanism 13 of the second coating device 20 can coat the first coating on the separator 100 to form the third coating of the separator 100. Then the separator 100 enters the heating chamber 141 of the first oven 14 of the second coating device 20 and passes over the plurality of supporting rollers 142 to convey the separator 100 through the plurality of supporting rollers 142. The nozzle of the first oven 14 of the second coating device 20 can heat and dry the third coating of the separator 100. Then the separator 100 exits from the heating chamber 141 of the first oven 14 of the second coating device 20 and successively passes over the spraying and adsorption roller 139, the lower spraying roller 137, and the upper spraying roller 138 of the B-side coating mechanism 15 of the second coating device 20. Then the separator 100 enters the heating chamber 141 of the second oven 16 of the second coating device 20 and passes over the plurality of supporting rollers 142 to convey the separator 100 through the plurality of supporting rollers 142. Then the separator 100 exits from the heating chamber 141 of the second oven 16 of the second coating device 20 and passes over the plurality of driving rollers 172 of the discharging and pulling mechanism 17 of the second coating device 20, and passes over the second pulling roller 183, the third pulling roller 184, the first pulling roller 182, and the pulling and adsorption roller 185 of the winding and pulling mechanism 18 of the second coating device 20. Then the winding mechanism 19 of the second coating device 20 winds up the separator 100.

[0068] The utility model realizes four coatings on the separator 100 through the arranged first coating device 10, second coating device 20 and reversing device 50. The first coating device 10 and the second coating device 20 both include an unwinding mechanism 11, an A-side coating mechanism 13, a first oven 14, a B-side coating mechanism 15, a second oven 16, a discharging and traction mechanism 17 and a winding mechanism 19. The reversing device 50 includes a first reversing mechanism 51, a second reversing mechanism 52 and a transition mechanism 53. The A side and B side of the separator 100 can be respectively coated through the first coating device 10 to form a first coating and a second coating of the separator 100. The separator 100 can be led from the first coating device 10 to the second coating device 20 through the reversing device 50. Thus, the first coating and the second coating of the separator 100 can be respectively coated through the second coating device 20 to form a third coating and a fourth coating of the separator 100. In this way, four coatings on the separator 100 can be realized. Compared with the prior art, the number of production personnel and the material transfer can be reduced, the production efficiency is greatly improved, and the production cost is reduced. In addition, the utility model can also realize single coating, double coating and triple coating on the separator 100, has multiple functions, can meet different coating methods, has a high equipment utilization rate, and greatly meets the production requirements.

[0069] The above is a specific description of the preferred embodiment of the utility model, but the creation of the utility model is not limited to the above embodiment. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the utility model, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A diaphragm parallel coating device, characterized in that, It includes a first coating device, a second coating device and a reversing device. The first coating device and the second coating device are arranged side by side front and back. Both the first coating device and the second coating device include an unwinding mechanism, an A-side coating mechanism, a first oven, a B-side coating mechanism, a second oven, a discharging and traction mechanism and a winding mechanism. The winding mechanism, the unwinding mechanism, the A-side coating mechanism, the first oven and the B-side coating mechanism are arranged at intervals from left to right. The discharging and traction mechanism is located above the unwinding mechanism and the A-side coating mechanism. The second oven is located above the first oven. The reversing device includes a first reversing mechanism, a second reversing mechanism and a transition mechanism. The first reversing mechanism is arranged in the discharging and traction mechanism of the first coating device. The second reversing mechanism is arranged in the discharging and traction mechanism of the second coating device. The transition mechanism is located between the first reversing mechanism and the second reversing mechanism. One end of the transition mechanism is arranged in the discharging and traction mechanism of the first coating device, and the other end of the transition mechanism is arranged in the discharging and traction mechanism of the second coating device.

2. The diaphragm parallel coating equipment according to claim 1, characterized in that Both the first coating device and the second coating device include a support platform. The unwinding mechanism, the A-side coating mechanism, the first oven and the B-side coating mechanism are all located within the support platform. The discharging and traction mechanism and the second oven are both arranged at the top of the support platform. The discharging and traction mechanism includes a discharging and traction platform arranged at the top of the support platform. A plurality of traction driving rollers are provided on the discharging and traction platform, and the plurality of traction driving rollers are arranged at intervals from right to left.

3. The diaphragm parallel coating equipment according to claim 2, characterized in that, The first reversing mechanism and the second reversing mechanism are symmetrically arranged front and back. Both the first reversing mechanism and the second reversing mechanism include a reversing frame and an air-floating roller. The reversing frame of the first reversing mechanism is arranged in the discharging and traction platform of the first coating device. The reversing frame of the second reversing mechanism is arranged in the discharging and traction platform of the second coating device. The air-floating roller is of a hollow structure. Two sealing plates are respectively provided at one end and the other end of the air-floating roller. The two sealing plates are respectively arranged at the top of the reversing frame. One of the sealing plates is provided with a connector, and the connector is communicated with the inside of the air-floating roller. The connector is connected to a blower. The outer peripheral surface of the air-floating roller has a pore area, and a number of air outlet holes are evenly distributed in the pore area. The number of air outlet holes are all communicated with the inside of the air-floating roller.

4. The diaphragm parallel coating device according to claim 3, wherein, The reversing frame has a first corner and a second corner arranged diagonally and a third corner and a fourth corner arranged diagonally. Both the first corner and the third corner are close to the transition mechanism. The third corner is located between the first corner and the second oven. One end of the air-floating roller is close to the first corner and is located between the first corner and the third corner. The other end of the air-floating roller is close to the second corner and is located between the fourth corner and the second corner. The pore area faces the fourth corner of the reversing frame.

5. The diaphragm parallel coating equipment according to claim 3, characterized in that, The transition mechanism includes a transition platform. One end of the transition platform is arranged in the discharging and traction platform of the first coating device, and the other end of the transition platform is arranged in the discharging and traction platform of the second coating device. The transition platform is located between the reversing frames of the first reversing mechanism and the second reversing mechanism and below the reversing frames of the first reversing mechanism and the second reversing mechanism. A plurality of transition rollers are arranged on the transition platform, and the plurality of transition rollers are arranged at intervals in sequence from front to back.

6. The diaphragm parallel coating device according to claim 5, wherein A flattening frame is arranged on one side of the reversing frame close to the transition platform. The flattening frame is located above the transition platform, and flattening rollers are arranged on the flattening frame.

7. The diaphragm parallel coating equipment according to claim 3, wherein A roller frame is arranged on one side of the reversing frame close to the second oven, and reversing rollers are arranged on the roller frame.

8. The diaphragm parallel coating equipment according to claim 1, characterized in that, Both the A-side coating mechanism and the B-side coating mechanism of the first coating device include a coating frame and an intaglio roller and two approaching rollers arranged on the coating frame. The two approaching rollers are arranged side by side vertically, and the intaglio roller is located on one side of the two approaching rollers and opposite to the two approaching rollers.

9. The diaphragm parallel coating equipment according to claim 1, characterized in that, Both the A-side coating mechanism and the B-side coating mechanism of the second coating device include a spraying frame, a spraying machine, an upper spraying roller and a lower spraying roller arranged on the spraying frame. The upper spraying roller and the lower spraying roller are arranged side by side vertically, and the spraying machine is arranged on one side of the upper spraying roller and the lower spraying roller and opposite to the upper spraying roller and the lower spraying roller.

10. The diaphragm parallel coating equipment according to claim 2, characterized in that, Both the first coating device and the second coating device include a preheating oven arranged between the unwinding mechanism and the A-side coating mechanism and a winding and traction mechanism arranged between the winding mechanism and the unwinding mechanism. The preheating oven and the winding and traction mechanism are both located below the discharging and traction mechanism and both within the support platform.

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