A curing device for manufacturing a conductive layer of a PET copper foil

Abstract

The present invention provides a curing device for manufacturing a conductive layer of a PET copper foil, which is used to solve the problem that both the two mainstream technical routes of wet coating and dry magnetron sputtering in the preparation of the conductive layer of the PET copper foil in the prior art have significant limitations. The present invention provides a curing device for manufacturing a conductive layer of a PET copper foil, including: a conductive layer manufacturing section, an automatic liquid feeding component, a leveling and liquid blocking component, and a coating stirring and filtering component. By nesting the conductive layer processing procedure in the front part of the pretreatment of the horizontal continuous copper-clad foil line, continuous production from the conductive layer processing to the copper-clad foil is realized, shortening the process flow, reducing the production cost, saving the production space, avoiding the film contamination caused by the independent processing and transportation of the film cloth, and improving the production quality of the PET copper foil.

Description

Technical Field

[0001] The present invention relates to the technical field of PET film cloth coating conductive film technology, and particularly to a curing device for manufacturing a conductive layer of a PET copper foil. Background Art

[0002] As a core material for the negative electrode current collector of lithium batteries, PET copper foil needs to meet key performance indicators such as high conductivity, thinness, and strong adhesion. However, since the PET material itself is insulating and non-conductive, copper foil cannot be directly attached to its surface. Therefore, before copper foil plating, a conductive layer needs to be processed on the surface of the PET film cloth. Currently, there are two mainstream technical routes for preparing the conductive layer of PET copper foil, but each has significant limitations:

[0003] Dry magnetron sputtering:

[0004] The heat resistance of PET material is not high, and the heat distortion temperature is about 85°C. The plasma heat load during the sputtering process is likely to cause the PET substrate to shrink, reducing the bonding force between the sputtered metal conductive layer and the PET interface; the single deposition thickness of magnetron sputtering is usually less than 1 micron, and multiple depositions are required to reach the thickness of the conductive layer required for copper foil coating, resulting in low processing efficiency; moreover, the unit price of magnetron sputtering equipment is high, and its production capacity does not match the equipment cost; in addition, the equipment needs to process the conductive layer in a sputtering vacuum environment, which is different from the processing environment of the subsequent continuous copper plating equipment for PET film cloth. The two devices work independently, increasing the winding, packaging, and transportation procedures of the film cloth, and unable to achieve continuous production from conductive layer processing to copper foil coating, prolonging the process flow and expanding the production space.

[0005] Wet coating:

[0006] The edge effect of the traditional blade / impregnation coating process is significant, and the coating thickness uniformity is poor, resulting in large local resistance differences in the conductive layer; the solid content and viscosity of the conductive paste are high, and the conductive paste is prone to sedimentation. There are dead corners in the traditional stirring system, which will cause agglomeration of coating particles, further reducing the deposition uniformity of the conductive coating. Moreover, the stirring force of the traditional stirring system is difficult to control, which will affect the continuous transmission of the film cloth and even cause damage to the film cloth; with the continuous processing of the conductive layer, impurities will be introduced into the film cloth during transmission, contaminating the conductive paste. The impurities are fixed in the film cloth in the conductive layer, which will greatly increase the risk of subsequent battery short circuit. Summary of the Invention

[0007] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a curing device for manufacturing a conductive layer of a PET copper foil, which improves the traditional coating process, enables the processing process of the conductive layer to be nested in the front part of the pretreatment of the horizontal continuous copper plating foil line, realizes continuous production from the processing of the conductive layer to the copper-clad foil, so as to shorten the process flow, reduce the production cost, save the production space and improve the production quality of the PET copper foil, and solve the problems in the prior art.

[0008] To achieve the above object and other related objects, the present invention provides a curing device for manufacturing a conductive layer of a PET copper foil, including: a copper foil processing line body, between the unwinding end and the pretreatment processing section of the copper foil processing line body, a conductive layer manufacturing section and a drying section are arranged from left to right, and the conductive layer manufacturing section is horizontally connected to the unwinding end of the copper foil processing line body, and the drying section is horizontally fixedly communicated with the pretreatment processing section of the copper foil processing line body;

[0009] The copper foil processing line body is used for the pretreatment, electroplating copper cladding and post-treatment processing of the production of electroplating and thickening the copper layer of the PET copper foil;

[0010] The conductive layer manufacturing section is used for coating a conductive coating on the surface of the PET membrane cloth, so as to form a conductive copper layer on the surface of the originally insulating PET membrane cloth;

[0011] The drying section is used for curing the conductive coating, so that the conductive coating forms a deposition layer on the surface of the PET membrane cloth;

[0012] The conductive layer manufacturing section includes a coating tank, a cover plate, a liquid flow output port and a membrane cloth transmission through groove. The upper part of the coating tank is hinged with a cover plate, the bottom of the coating tank is provided with two liquid flow output ports, the left wall and the right wall of the coating tank are horizontally and correspondingly provided with membrane cloth transmission through grooves, and the PET membrane cloth passes through the two membrane cloth transmission through grooves;

[0013] The rear wall of the coating tank is provided with two automatic liquid feeding components, a leveling liquid blocking component is arranged horizontally through the coating tank, and a coating stirring and filtering component is arranged in the coating tank;

[0014] The automatic liquid feeding component is used to utilize the buoyancy of the conductive coating in the coating tank to realize automatic addition of the coating and ensure the liquid level height of the conductive coating in the coating tank;

[0015] The leveling liquid blocking component is used to scrape a uniform layer of conductive coating on the surface of the PET membrane cloth and prevent the conductive coating from flowing out with the transmission of the PET membrane cloth, and squeeze and isolate the conductive coating in the coating tank;

[0016] The coating stirring and filtering component is used to stir the coating and filter impurities in the coating, and control the coating to keep flowing without generating bubbles and without affecting the transmission of the PET membrane cloth, and be evenly distributed in the coating tank to avoid precipitation;

[0017] The paint stirring and filtering assembly includes a variable-frequency speed-regulating motor, a spiral stirring paddle, a deflector, a first filter mesh cylinder, a second filter mesh cylinder, and a third filter mesh cylinder. A variable-frequency speed-regulating motor is installed on the outer side of the left wall of the paint tank through a connector. The output end of the variable-frequency speed-regulating motor is provided with a pair of meshing gears, and the output end of the variable-frequency speed-regulating motor controls two spiral stirring paddles through a meshing gear set. The left end and the right end of the spiral stirring paddle are respectively rotatably installed in the left wall and the right wall of the paint tank. Two deflectors are fixedly installed between the left wall and the right wall of the paint tank. A first filter mesh cylinder, a second filter mesh cylinder, and a third filter mesh cylinder are respectively arranged on the outer periphery of the two spiral stirring paddles.

[0018] Optionally, the unit mesh sizes of the first filter mesh cylinder, the second filter mesh cylinder, and the third filter mesh cylinder are set from large to small. The two deflectors are placed obliquely in an "eight" shape when viewed from the left. The stirring paddle body of the spiral stirring paddle is three groups of spiral blades, and the inclination angle of the blades is 45 degrees. The two deflectors, the PET film cloth passing through the paint tank, and the paint tank wall divide the lower part of the paint tank into two non-interfering spaces on the left and right, and the two spiral stirring paddles are respectively arranged in these two spaces. The two spiral stirring paddles drive the conductive paint in the paint tank to form two independent liquid circulation flows with opposite directions.

[0019] Optionally, the components of the first filter mesh cylinder, the second filter mesh cylinder, and the third filter mesh cylinder are the same. The first filter mesh cylinder, the second filter mesh cylinder, and the third filter mesh cylinder all include a filter cylinder body, a guide slider, a handle, a fixed seat, a one-way door, a rotating shaft, a limit card slot, a spring installation groove, and a torsion spring. Three guide sliders are equidistantly fixed on the outer walls of the left end and the right end of the filter cylinder body, and the filter cylinder body is slidably clamped in the left wall and the right wall of the paint tank respectively through the three guide sliders at the left end and the three guide sliders at the right end. A handle is fixedly installed at the left end of the filter cylinder body. A fixed seat is arranged on the side of the filter opening of the filter cylinder body. A one-way door is hinged on the fixed seat through a rotating shaft, and the one-way door rotates and closes with the filter opening of the filter cylinder body. A limit card slot is opened on the inner wall of the filter cylinder body away from the hinged side of the one-way door of the filter opening, and the movable side of the one-way door is intermittently rotatably clamped in the limit card slot. A connected spring installation groove is opened at the connection between the fixed seat and the one-way door. Two torsion springs are sleeved on the outer wall of the rotating shaft, and the torsion springs are clamped in the spring installation groove. The fixed end of the torsion spring abuts against the fixed seat, and the rebounding end of the torsion spring abuts against the rotating end of the one-way door.

[0020] Optionally, the one-way door is a solid plate made of PEEK material, and the one-way doors of the first filter mesh cylinder, the second filter mesh cylinder, and the third filter mesh cylinder are all arranged facing the flow direction of the liquid circulation.

[0021] Optionally, the automatic liquid feeding assembly includes a three-way liquid inlet pipe, a mounting seat, a guide rod, a floating block, a connecting rod, and a lifting valve flap. The three-way liquid inlet pipe is fixed inside the rear wall of the coating tank. A pair of mounting seats are respectively arranged on the left and right parts of the three-way liquid inlet pipe. The rear ends of the four mounting seats are fixed to the inner side of the rear wall of the coating tank. A guide rod is fixed between two mounting seats that are vertically aligned up and down. The outer walls of the two guide rods are slidably sleeved with a floating block. The floating block floats on the surface of the conductive coating liquid in the coating tank. Two connecting rods are fixed to the floating block. The tops of the two connecting rods are fixed with a lifting valve flap. The lifting valve flap is slidably connected to the front three-way port of the three-way liquid inlet pipe.

[0022] Optionally, the height of the lifting valve flap is greater than the diameter of the horizontal part of the three-way liquid inlet pipe, and the lifting valve flap is intermittently sealed with the horizontal part of the three-way liquid inlet pipe.

[0023] Optionally, the leveling liquid blocking assembly includes a hexagonal drive shaft, a bevel gear transmission group, a support rotating seat, a liquid coating and water blocking roller, and a spur gear transmission group. The hexagonal drive shaft is rotatably arranged through the front part of the coating tank. The hexagonal drive shaft is connected and linked with the film cloth conveying system of the copper foil processing line body. A pair of support rotating seats are respectively arranged on the inner and outer sides of the left wall of the coating tank. Two pairs of support rotating seats are arranged on the inner side of the right wall of the coating tank. A pair of support rotating seats are arranged on the outer side of the right wall of the coating tank. The positions of the two support rotating seats arranged in a pair are both corresponding front and back. The support rotating seats are fixedly connected to the coating tank through connecting pieces. A pair of liquid coating and water blocking rollers that are oppositely and fittingly rotated are rotatably installed between each pair of support rotating seats. The PET film cloth passes through between the five pairs of liquid coating and water blocking rollers. A spur gear transmission group is arranged at the rear end of each pair of liquid coating and water blocking rollers. A bevel gear transmission group is arranged between the front end of the lower liquid coating and water blocking roller and the outer wall of the hexagonal drive shaft.

[0024] Optionally, the outer wall materials of the upper five liquid coating and water blocking rollers are silicone, the materials of the lower five liquid coating and water blocking rollers are 316 stainless steel, and the outer walls of the lower five liquid coating and water blocking rollers are provided with grid patterns and sprayed with a Teflon coating.

[0025] As described above, the conductive layer manufacturing and curing device for PET copper foil of the present invention has at least the following beneficial effects:

[0026] 1. By nesting the conductive layer processing process in the front part of the pretreatment of the horizontal continuous copper plating foil line, continuous production from the conductive layer processing to the copper-clad foil is realized. While shortening the process flow and reducing the production cost, it saves production space and avoids the film cloth pollution caused by the independent processing and transportation of the film cloth, improving the production quality of PET copper foil.

[0027] 2. The automatic liquid feeding component utilizes the buoyancy of the conductive coating in the coating tank to achieve automatic addition of the coating, ensuring the liquid level height of the conductive coating in the coating tank, so that the membrane cloth is always immersed in the conductive paste during the conveying process, and is automatically attached, ensuring the processing effect of the PET conductive layer.

[0028] 3. The leveling liquid blocking component can scrape a layer of uniform conductive coating on the surface of the PET membrane cloth, prevent the conductive coating from flowing out with the conveyance of the PET membrane cloth, squeeze and isolate the conductive coating in the coating tank, avoid the use of traditional coating processes, make the coating thickness uniformity strong, the local resistance difference of the conductive layer of the PET copper foil small, and the safety strong.

[0029] 4. The coating stirring and filtering component is used to stir the coating, control the coating to keep flowing without generating bubbles, without affecting the conveyance of the PET membrane cloth and without dead corners, be evenly distributed in the coating tank, avoid precipitation, and improve the deposition uniformity of the conductive coating layer.

[0030] 5. The one-way door and the filtering mesh cylinder can filter impurities in the coating and make the impurities only go in and not out, reducing the short-circuit risk of the subsequent battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It shows a perspective view of the overall structure of the present invention from the southeast perspective.

[0032] Figure 2 It shows a front view schematic diagram of the overall structure of the present invention.

[0033] Figure 3 It shows a perspective view of the structure of the conductive layer manufacturing section of the present invention from the southwest perspective.

[0034] Figure 4 It shows a left view schematic diagram of the installation positions of the coating tank, the automatic liquid feeding component and the coating stirring and filtering component of the present invention.

[0035] Figure 5 It shows a perspective view of the structure of the automatic liquid feeding component of the present invention from the southeast perspective.

[0036] Figure 6 It shows a left view cross-sectional view of the structure of the automatic liquid feeding component of the present invention.

[0037] Figure 7 It shows a front view cross-sectional view of the structure of the automatic liquid feeding component of the present invention.

[0038] Figure 8 It shows a perspective view of the structure of the leveling liquid blocking component of the present invention from the southwest perspective.

[0039] Figure 9 It shows a perspective view of the structure of the coating stirring and filtering component of the present invention from the southwest perspective.

[0040] Figure 10 A perspective view from the northeast showing the structure of the first filtering grid cylinder on the right side of the present invention.

[0041] Figure 11 Shown is the present invention Figure 10 An enlarged view of the structure of area A therein.

[0042] Figure 12 A left perspective view showing the structure of the first filtering grid cylinder on the right side of the present invention.

[0043] Figure 13 Shown is the present invention Figure 12 An enlarged view of the structure of area B therein.

[0044] Figure 14 A left perspective view showing the circulation of the conductive paste liquid flow in the coating tank of the present invention.

[0045] Figure 15 A top schematic view showing the structure of the conductive layer manufacturing section of the present invention.

[0046] Figure 16 A left perspective view showing the structure of the conductive layer manufacturing section of the present invention.

[0047] Explanation of component numbers

[0048] 1. Copper foil processing line body;

[0049] 2. Conductive layer manufacturing section; 201. Coating tank; 202. Cover plate; 203. Liquid flow outlet; 204. Membrane cloth transfer through slot;

[0050] 3. Automatic liquid inlet assembly; 301. Three-way liquid inlet pipe; 302. Mounting seat; 303. Guide rod; 304. Floating block; 305. Link; 306. Lifting valve flap;

[0051] 4. Liquid leveling and liquid blocking assembly; 401. Hexagonal transmission shaft; 402. Bevel gear transmission group; 403. Support rotating seat; 404. Liquid coating and water blocking roller; 405. Spur gear transmission group;

[0052] 5. Coating stirring and filtering assembly; 501. Variable frequency speed regulating motor; 502. Spiral stirring paddle; 503. Deflector; 504. First filtering grid cylinder; 505. Second filtering grid cylinder; 506. Third filtering grid cylinder;

[0053] 5041. Filtering cylinder body; 5042. Guide slider; 5043. Handle; 5044. Fixed seat; 5045. One-way door; 5046. Rotating shaft; 5047. Limit card slot; 5048. Spring installation groove; 5049. Torsion spring. Detailed implementation manner

[0054] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the embodiments cited are not intended to limit the present invention.

[0055] As described in the background art, due to the existing dry magnetron sputtering technology for preparing the conductive layer of PET copper foil: the heat resistance of PET material is not high, the heat distortion temperature is low, and the plasma heat load during the sputtering process is likely to cause the shrinkage of the PET substrate, reducing the bonding force between the sputtered metal conductive layer and the PET interface; the single deposition thickness of magnetron sputtering is usually less than 1 micron, and multiple depositions are required to reach the thickness of the conductive layer required for copper-clad foil, resulting in low processing efficiency; moreover, the cost of magnetron sputtering equipment is high, and its production capacity does not match the equipment cost; in addition, its equipment needs to process the conductive layer in a sputtering vacuum environment, which is different from the processing environment of the subsequent continuous copper plating equipment for PET film cloth. The two equipment work independently, increasing the winding, packaging and transportation procedures of the film cloth, unable to achieve continuous production from the processing of the conductive layer to the copper-clad foil, prolonging the process flow and expanding the production space.

[0056] And the existing wet coating technology for preparing the conductive layer of PET copper foil also has problems: the edge effect of the traditional doctor blade / impregnation coating process is significant, and the coating thickness uniformity is poor, resulting in large local resistance differences in the conductive layer; the solid content and viscosity of the conductive paste are high, the conductive paste is prone to sedimentation, and there are dead corners in the traditional stirring system, which will cause agglomeration of coating particles, further reducing the deposition uniformity of the conductive coating, and the stirring force of the traditional stirring system is difficult to control, which will affect the continuous transmission of the film cloth and even cause damage to the film cloth; with the continuous processing of the conductive layer, impurities will be brought into the film cloth during transmission, contaminating the conductive paste, and the impurities are fixed on the film cloth in the conductive layer, which will greatly increase the risk of subsequent battery short circuit.

[0057] Embodiment 1

[0058] As Figures 1-4 、 Figure 14 and Figure 16 shown, to solve the above problems, the inventor improved the traditional coating process, nested the conductive layer processing procedure in the front part of the pretreatment of the horizontal continuous copper-clad foil line, realized continuous production from the processing of the conductive layer to the copper-clad foil, shortened the process flow, reduced the production cost, saved the production space and improved the production quality of PET copper foil. Thus, an apparatus for fabricating and curing the conductive layer of PET copper foil is invented, including: a copper foil processing line body 1, a conductive layer fabrication section 2 and a drying section are arranged from left to right between the unwinding end and the pretreatment processing section of the copper foil processing line body 1, and the conductive layer fabrication section 2 is horizontally connected to the unwinding end of the copper foil processing line body 1, and the drying section is horizontally fixedly communicated with the pretreatment processing section of the copper foil processing line body 1;

[0059] The copper foil processing line 1 is used for the pretreatment, electroplating copper coating, and post-treatment processing of PET copper foil electroplating and thickening copper layer production;

[0060] The conductive layer manufacturing section 2 is used to coat the conductive coating on the surface of the PET film cloth, so as to form a conductive copper layer on the surface of the originally insulating PET film cloth;

[0061] The drying section is used to cure the conductive coating, so that the conductive coating forms a deposition layer on the surface of the PET film cloth;

[0062] The conductive layer manufacturing section 2 includes a coating tank 201, a cover plate 202, a liquid flow outlet 203, and a film cloth transmission through groove 204. The cover plate 202 is hinged to the upper part of the coating tank 201. Two liquid flow outlets 203 are arranged at the bottom of the coating tank 201. The film cloth transmission through grooves 204 are horizontally and correspondingly arranged on the left and right walls of the coating tank 201. The PET film cloth passes through the two film cloth transmission through grooves 204.

[0063] During use, the PET film cloth is output from the unwinding end of the copper foil processing line 1 from left to right and enters the conductive layer manufacturing section 2. The upper and lower surfaces of the film cloth are evenly coated with the conductive coating. Then the film cloth continues to move to the right and enters the drying section. The conductive coating on the upper and lower surfaces of the film cloth is air-dried and fixed on the surface of the film cloth, forming a PET film cloth with an attached conductive layer, which is transported into the processing section of the copper foil processing line 1 for electroplating copper foil processing on the conductive layer. In this way, the continuous production from the conductive layer processing to the copper foil coating is realized, the process flow is shortened, the production and processing cost is reduced, there is no need to provide independent equipment and site for the conductive layer processing, the production space is saved, and the film cloth pollution caused by the independent processing and transportation of the film cloth is avoided, improving the production quality of PET copper foil.

[0064] Embodiment 2

[0065] Please refer to Figures 3-7 and Figures 14-16The present invention provides a conductive layer manufacturing and curing device for PET copper foil, which also includes: an automatic liquid inlet component 3, two automatic liquid inlet components 3 are arranged on the rear wall of the coating tank 201, and the automatic liquid inlet component 3 is used to utilize the buoyancy of the conductive coating in the coating tank 201 to realize automatic addition of the coating, and ensure the height of the conductive coating liquid level in the coating tank 201, and the automatic liquid inlet component 3 includes a three-way liquid inlet pipe 301, a mounting seat 302, a guide rod 303, a floating block 304, a connecting rod 305 and a lifting valve flap 306, and a three-way liquid inlet pipe 301 is fixed in the rear wall of the coating tank 201, and the rear end of the three-way liquid inlet pipe 301 is connected to a conductive slurry input system, and the conductive slurry is continuously input into the three-way liquid inlet pipe 301, and the left and right parts of the three-way liquid inlet pipe 301 are respectively provided with a For the mounting seat 302, the rear ends of the four mounting seats 302 are fixed to the inner side of the rear wall of the paint tank 201, and a guide rod 303 is fixed between the two mounting seats 302 on the same vertical line. The outer walls of the two guide rods 303 are slidably sleeved with a float block 304, and the float block 304 floats on the conductive paint liquid surface in the paint tank 201. The two guide rods 303 can limit the up and down position of the float block 304 when it floats. Two connecting rods 305 are fixed on the float block 304, and a lifting valve flap 306 is fixed on the top of the two connecting rods 305. The lifting valve flap 306 is slidably connected in the front three-way port of the three-way liquid inlet pipe 301. The lifting valve flap 306 can float up and down with the float block 304, and move in conjunction with it to control the automatic closing or opening of the three-way liquid inlet pipe 301.

[0066] More perfectly, if Figures 6-7 As shown, the height of the lifting valve flap 306 is greater than the diameter of the horizontal part of the three-way liquid inlet pipe 301, and the lifting valve flap 306 and the horizontal part of the three-way liquid inlet pipe 301 are intermittently sealed, so that the lifting valve flap 306 can completely seal the horizontal part of the three-way liquid inlet pipe 301 when it rises to the highest point, and the lifting movement of the lifting valve flap 306 can be stabilized within the sliding restriction of the vertical part of the three-way liquid inlet pipe 301, thereby ensuring the movement stability of the lifting valve flap 306.

[0067] Specifically, when the liquid level of the conductive paint in the paint tank 201 drops to expose the leveling liquid blocking component 4, the float 304 begins to drop with the liquid level, synchronously driving the connecting rod 305 and the lifting valve flap 306 to drop, and the horizontal liquid inlet of the three-way liquid inlet pipe 301 is opened, and the conductive paint will automatically flow into the paint tank 201 until the liquid level rises to completely immerse the leveling liquid blocking component 4, and the float 304 rises to close the lifting valve flap 306, thereby ensuring the liquid level of the conductive paint in the paint tank 201, so that the membrane cloth is always immersed in the conductive slurry during the transmission process. During transmission, the membrane cloth automatically adheres to the conductive slurry to ensure the processing effect of the PET conductive layer.

[0068] Example 3

[0069] See alsoFigure 3 , Figure 8 and Figures 14-16 , the present invention provides a curing device for manufacturing a conductive layer of a PET copper foil, further comprising: a leveling and liquid-blocking assembly 4. A leveling and liquid-blocking assembly 4 is disposed through the coating tank 201 in the left-right direction. The leveling and liquid-blocking assembly 4 is used for scraping a uniform layer of conductive coating on the surface of the PET film cloth and preventing the conductive coating from flowing out along with the conveyance of the PET film cloth, squeezing and isolating the conductive coating within the coating tank 201. The leveling and liquid-blocking assembly 4 includes a hexagonal transmission shaft 401, a bevel gear transmission group 402, a support rotating seat 403, a liquid-applying and water-blocking roller 404, and a spur gear transmission group 405. The hexagonal transmission shaft 401 is rotatably disposed through the front part of the coating tank 201. The hexagonal transmission shaft 401 is connected and linked to the film cloth conveyance system of the copper foil processing line body 1. A pair of support rotating seats 403 are respectively disposed on the inner and outer sides of the left wall of the coating tank 201, two pairs of support rotating seats 403 are disposed on the inner side of the right wall of the coating tank 201, and a pair of support rotating seats 403 are disposed on the outer side of the right wall of the coating tank 201. Moreover, the positions of the two support rotating seats 403 arranged in a pair are corresponding front and back. The support rotating seat 403 is fixedly connected to the coating tank 201 through a connecting member. A pair of liquid-applying and water-blocking rollers 404 that are in mutual opposing and fitting rotation are rotatably installed between each pair of support rotating seats 403, and the PET film cloth passes through between the five pairs of liquid-applying and water-blocking rollers 404. A spur gear transmission group 405 is disposed at the rear end of each pair of liquid-applying and water-blocking rollers 404. A bevel gear transmission group 402 is disposed between the front end of the lower liquid-applying and water-blocking roller 404 and the outer wall of the hexagonal transmission shaft 401. The hexagonal transmission shaft 401 is synchronously linked with the film cloth conveyance system of the copper foil processing line body 1. While ensuring that the processing and conveyance frequency of the conductive film cloth in the conductive layer manufacturing section 2 is synchronized with the processing frequency of the copper foil processing line body 1, power is provided for the bevel gear transmission group 402 at the same time, so that the transmissions of the bevel gear transmission group 402 and the spur gear transmission group 405 are coordinated, driving the upper liquid-applying and water-blocking rollers 404 of each pair of liquid-applying and water-blocking rollers 404 to rotate counterclockwise and the lower liquid-applying and water-blocking rollers 404 to rotate clockwise synchronously.

[0070] More perfectly, as Figure 8 shown, the outer wall material of the upper five liquid-applying and water-blocking rollers 404 is silica gel, increasing the friction of conveyance. The material of the lower five liquid-applying and water-blocking rollers 404 is 316 stainless steel, and the outer wall of the lower five liquid-applying and water-blocking rollers 404 is provided with grid patterns and sprayed with a Teflon coating, ensuring that when the film cloth passes through, the grid patterns make the conductive coating evenly distributed on the surface of the film cloth.

[0071] Specifically, the processing and conveying frequency of the conductive film cloth in the conductive layer manufacturing section 2 is the same as the processing frequency of the copper foil processing line body 1. The hexagonal drive shaft 401 drives the bevel gear transmission group 402 to provide power, enabling the transmission of the bevel gear transmission group 402 and the spur gear transmission group 405 to cooperate. This drives the upper liquid coating water-retaining rollers 404 of each pair of liquid coating water-retaining rollers 404 to rotate counterclockwise, and the lower liquid coating water-retaining rollers 404 to rotate clockwise synchronously. The PET film cloth passing through them is continuously pushed to move to the right by their rotation. At the same time, the use of traditional spraying devices such as nozzles and spray pipes is avoided. The excess conductive coating on the film cloth is automatically extruded and pushed out and smoothed, making the conductive coating evenly distributed on the film cloth. And the five pairs of liquid coating water-retaining rollers 404 are respectively arranged inside and outside the two film cloth conveying through grooves 204, which also play a role in blocking liquid, isolating the conductive coating in the coating tank 201, and preventing the conductive coating from flowing out when the film cloth is conveyed. In this way, the use of traditional coating processes is avoided, the uniformity of the coating thickness is strong, the local resistance difference of the conductive layer of the PET copper foil is small, and the safety is strong.

[0072] Example 4

[0073] Please refer to Figures 3-4 and Figures 9-16 As shown in and, the present invention provides a curing device for manufacturing the conductive layer of a PET copper foil, further including: a coating stirring and filtering assembly 5. A coating stirring and filtering assembly 5 is arranged in the coating tank 201. The coating stirring and filtering assembly 5 is used for stirring the coating and filtering impurities in the coating, controlling the coating to maintain flow without generating bubbles and without affecting the conveyance of the PET film cloth, and being evenly distributed in the coating tank 201 to avoid precipitation. The coating stirring and filtering assembly 5 includes a variable-frequency speed-regulating motor 501, a spiral stirring paddle 502, a flow guide plate 503, a first filter mesh cylinder 504, a second filter mesh cylinder 505, and a third filter mesh cylinder 506. The variable-frequency speed-regulating motor 501 is installed on the outer side of the left wall of the coating tank 201 through a connecting member. A pair of meshing gears are arranged at the output end of the variable-frequency speed-regulating motor 501, and the output end of the variable-frequency speed-regulating motor 501 controls two spiral stirring paddles 502 through a meshing gear set. The left end and the right end of the spiral stirring paddle 502 are respectively rotatably installed in the left wall and the right wall of the coating tank 201. Two flow guide plates 503 are fixedly installed between the left wall and the right wall of the coating tank 201. The flow guide plates 503 play a certain isolation role to prevent the liquid flow circulation of the conductive coating in the front and rear parts of the coating tank 201 from interfering with each other. The first filter mesh cylinder 504, the second filter mesh cylinder 505, and the third filter mesh cylinder 506 are respectively arranged on the outer periphery of the two spiral stirring paddles 502.

[0074] Further, as shown in Figures 10-13As shown, the components of the first filter mesh cylinder 504, the second filter mesh cylinder 505, and the third filter mesh cylinder 506 are the same. The first filter mesh cylinder 504, the second filter mesh cylinder 505, and the third filter mesh cylinder 506 all include a filter cylinder body 5041, a guide slider 5042, a handle 5043, a fixed seat 5044, a one-way door 5045, a rotating shaft 5046, a limit card slot 5047, a spring installation groove 5048, and a torsion spring 5049. Three guide sliders 5042 are evenly fixed on the outer walls of the left and right ends of the filter cylinder body 5041. The filter cylinder body 5041 is slidably clamped in the left and right walls of the paint tank 201 through the three guide sliders 5042 at the left end and the three guide sliders 5042 at the right end respectively. A handle 5043 is fixedly installed at the left end of the filter cylinder body 5041. The handle 5043 is convenient for workers to hold and slide the filter cylinder body 5041 in or out of the paint tank 201 to clean and pour out the impurities in the cylinder. A fixed seat 5044 is arranged on one side of the filter opening of the filter cylinder body 5041. A one-way door 5045 is hinged to the fixed seat 5044 through a rotating shaft 5046. The one-way door 5045 rotates and closes with the filter opening of the filter cylinder body 5041. A limit card slot 5047 is opened on the inner wall of the filter cylinder body 5041 away from the hinged side of the one-way door 5045 at the filter opening. The movable side of the one-way door 5045 is intermittently rotatably clamped in the limit card slot 5047. A connected spring installation groove 5048 is opened at the connection between the fixed seat 5044 and the one-way door 5045. Two torsion springs 5049 are sleeved on the outer wall of the rotating shaft 5046. The torsion springs 5049 are clamped in the spring installation groove 5048. The fixed end of the torsion spring 5049 abuts against the fixed seat 5044, and the rebounding end of the torsion spring 5049 abuts against the rotating end of the one-way door 5045, so that the one-way door 5045 can be automatically opened inward under the action of the torsion spring 5049 when impacted, facilitating the entry of impurities in the conductive paint and being filtered and intercepted by the filter cylinder body 5041.

[0075] More perfectly, as Figure 9 and Figure 14As shown in the figure, the unit mesh sizes of the first filtering mesh cylinder 504, the second filtering mesh cylinder 505 and the third filtering mesh cylinder 506 are set from large to small. The two flow guiding plates 503 are placed obliquely in an "eight" shape when viewed from the left. The stirring paddle body of the spiral stirring paddle 502 is composed of three groups of spiral blades, and the inclination angle of the blades is 45 degrees. The two flow guiding plates 503, the PET film cloth passing through the paint tank 201 and the wall of the paint tank 201 divide the lower part of the paint tank 201 into two non-interfering spaces on the left and right. And the two spiral stirring paddles 502 are respectively arranged in these two spaces. The opposite synchronous rotation of the two spiral stirring paddles 502 can drive the conductive paint in the paint tank 201 to form two independent liquid circulation flows with opposite flow directions. And the liquid flow sequentially passes through the first filtering mesh cylinder 504, the second filtering mesh cylinder 505 and the third filtering mesh cylinder 506. Due to the mesh size, the resistance received increases from small to large, gradually reducing the impact force of the liquid circulation flow, making the conductive paint close to the film cloth flow smoothly and evenly distributed, avoiding the generation of eddy currents and bringing in air bubbles. The two liquid flows avoid the flow dead corners of the conductive paint, further ensuring the uniform mixing of the conductive paint and avoiding sedimentation.

[0076] More perfectly, as Figures 12-14 shown, the one-way door 5045 is a solid plate made of PEEK material. The one-way doors 5045 of the first filtering mesh cylinder 504, the second filtering mesh cylinder 505 and the third filtering mesh cylinder 506 are all arranged facing the flow direction of the liquid circulation, which is convenient for impurities to enter during the circulation process of the conductive paint.

[0077] Specifically, the variable-frequency speed-regulating motor 501 provides power for the opposite rotation of the two spiral stirring paddles 502. The two spiral stirring paddles 502 rotate synchronously in opposite directions, with three groups of spiral blades at a tilt angle of 45 degrees, two flow guide plates 503 placed obliquely in an "eight" shape, and a membrane cloth passing through the self-leveling liquid-blocking assembly 4, driving the conductive paint in the paint tank 201 to form two independent liquid circulations with opposite flow directions. During the circulation process, the liquid flow impacts and sequentially opens the one-way doors 5045 in the forward flow direction, and passes through the first filter mesh cylinder 504, the second filter mesh cylinder 505, and the third filter mesh cylinder 506. On the one hand, due to the arrangement of the mesh sizes of the first filter mesh cylinder 504, the second filter mesh cylinder 505, and the third filter mesh cylinder 506, with the resistance increasing from small to large, the impact force of the liquid circulation can be gradually reduced layer by layer, making the conductive paint near the membrane cloth flow smoothly and evenly distributed. While stirring and mixing the conductive paint, it avoids generating eddy currents and bringing in air bubbles. On the other hand, the filter mesh cylinder can unidirectionally filter and intercept the impurities entering it, and through the one-way self-locking setting of the one-way door 5045, the impurities can only enter and not exit. Finally, the two liquid flows avoid the dead corners of the conductive paint flow, further ensuring the uniform mixing of the conductive paint and preventing deposition. In this way, the combination of stirring and mixing and liquid flow circulation filtration ensures the uniform distribution and cleanliness of the conductive paint, improves the uniform deposition of the conductive coating, and reduces the short-circuit risk of subsequent batteries.

[0078] Therefore, the present invention effectively overcomes various drawbacks in the prior art and has high industrial utilization value.

[0079] Although the present invention has been described in detail above with general descriptions and specific embodiments, based on the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A conductive layer manufacturing and curing device for PET copper foil, characterized in that: include: A copper foil processing line (1), wherein a conductive layer production section (2) and a drying section are arranged from left to right between the unwinding end and the pre-processing section of the copper foil processing line (1), and the conductive layer production section (2) is horizontally connected to the unwinding end of the copper foil processing line (1), and the drying section is horizontally fixedly connected to the pre-processing section of the copper foil processing line (1); The copper foil processing line (1) is used for pre-treatment, copper electroplating and post-treatment of PET copper foil electroplating thickened copper layer production; The conductive layer making section (2) is used to coat the surface of the PET film cloth with a conductive coating so as to form a conductive copper layer on the surface of the originally insulating PET film cloth; The drying section is used to solidify the conductive coating so that the conductive coating forms a deposition layer on the surface of the PET film cloth; The conductive layer production section (2) comprises a coating tank (201), a cover plate (202), a liquid outlet (203) and a membrane cloth conveying slot (204); the upper part of the coating tank (201) is hingedly connected with the cover plate (202); the bottom of the coating tank (201) is provided with two liquid outlets (203); the left and right walls of the coating tank (201) are horizontally provided with membrane cloth conveying slots (204) correspondingly; the PET membrane cloth passes through the two membrane cloth conveying slots (204); The rear wall of the paint tank (201) is provided with two automatic liquid inlet components (3), a leveling liquid blocking component (4) is provided in the paint tank (201) in a left-right direction, and a paint stirring and filtering component (5) is provided in the paint tank (201); The automatic liquid inlet component (3) is used to utilize the buoyancy of the conductive paint in the paint tank (201) to achieve automatic addition of the paint, thereby ensuring the liquid level of the conductive paint in the paint tank (201); The leveling and liquid blocking component (4) is used to scrape a uniform layer of conductive coating on the surface of the PET film cloth, and prevent the conductive coating from flowing out along with the PET film cloth, and squeeze and isolate the conductive coating in the coating tank (201); The paint stirring and filtering assembly (5) is used to stir the paint and filter impurities in the paint, and control the paint to maintain flow without generating bubbles and without affecting the transmission of the PET film cloth, so as to evenly distribute the paint in the paint tank (201) and avoid precipitation; The paint stirring and filtering assembly (5) comprises a variable frequency speed regulating motor (501), a spiral stirring paddle (502), a guide plate (503), a first filter mesh cylinder (504), a second filter mesh cylinder (505) and a third filter mesh cylinder (506); a variable frequency speed regulating motor (501) is installed on the outer side of the left wall of the paint tank (201) via a connecting piece; a pair of meshing gears are arranged at the output end of the variable frequency speed regulating motor (501); and the variable frequency speed regulating motor (501) is provided with a plurality of meshing gears. The output end is controlled by a meshing gear set output and has two spiral stirring paddles (502), and the left end and the right end of the spiral stirring paddle (502) are rotatably mounted in the left wall and the right wall of the paint tank (201), respectively. Two guide plates (503) are fixedly mounted between the left wall and the right wall of the paint tank (201), and the peripheries of the two spiral stirring paddles (502) are respectively provided with a first filter mesh cylinder (504), a second filter mesh cylinder (505) and a third filter mesh cylinder (506).

2. The conductive layer manufacturing and curing device of PET copper foil according to claim 1, characterized in that: The unit mesh sizes of the first filter mesh cylinder (504), the second filter mesh cylinder (505) and the third filter mesh cylinder (506) are arranged from large to small. The two guide plates (503) are tilted in an "eight" shape when viewed from the left. The stirring paddle body of the spiral stirring paddle (502) is three groups of spiral blades, and the inclination angle of the blades is forty-five degrees. The two guide plates (503), the PET film cloth passing through the paint tank (201) and the wall of the paint tank (201) divide the lower part of the paint tank (201) into two left and right spaces that do not interfere with each other, and the two spiral stirring paddles (502) are respectively arranged in the two spaces. The two spiral stirring paddles (502) drive the conductive paint in the paint tank (201) to form two independent and oppositely flowing liquid circulations.

3. The conductive layer manufacturing and curing device of PET copper foil according to claim 2, characterized in that: The components of the first filter mesh cylinder (504), the second filter mesh cylinder (505) and the third filter mesh cylinder (506) are the same. The first filter mesh cylinder (504), the second filter mesh cylinder (505) and the third filter mesh cylinder (506) all include a filter cylinder body (5041), a guide slider (5042), a handle (5043), a fixing seat (5044), a one-way door (5045), a rotating shaft (5046), a limit slot (5047), a spring The filter cylinder (5041) is provided with a mounting groove (5048) and a torsion spring (5049), and three guide sliders (5042) are fixed at equal distances on the outer walls of the left and right ends of the filter cylinder (5041), and the filter cylinder (5041) is slidably connected to the left and right walls of the paint tank (201) through the three guide sliders (5042) at the left end and the three guide sliders (5042) at the right end, respectively. A handle (5043) is fixedly installed on the left end of the filter cylinder (5041). A fixing seat (5044) is provided on one side of the filter opening of the filter cylinder (5041), and a one-way door (5045) is hingedly connected to the fixing seat (5044) via a rotating shaft (5046). The one-way door (5045) and the filter opening of the filter cylinder (5041) are rotated and closed, and a limiting card slot (5047) is provided on the inner wall of the filter opening on the filter cylinder (5041) away from the hinged side of the one-way door (5045), and the movable side of the one-way door (5045) is intermittently rotated and clamped in the limiting card slot (5047). 5047), a connected spring installation groove (5048) is provided at the connection between the fixed seat (5044) and the one-way door (5045), two torsion springs (5049) are sleeved on the outer wall of the rotating shaft (5046), and the torsion spring (5049) is clamped in the spring installation groove (5048), the fixed end of the torsion spring (5049) is in contact with the fixed seat (5044), and the rebound end of the torsion spring (5049) is in contact with the rotating end of the one-way door (5045).

4. The conductive layer manufacturing and curing device of PET copper foil according to claim 3, characterized in that: The one-way door (5045) is a solid plate made of PEEK material, and the one-way doors (5045) of the first filter grid cylinder (504), the second filter grid cylinder (505) and the third filter grid cylinder (506) are all arranged facing the flow direction of the liquid circulation.

5. The conductive layer manufacturing and curing device of PET copper foil according to claim 1, characterized in that: The automatic liquid inlet assembly (3) comprises a three-way liquid inlet pipe (301), a mounting seat (302), a guide rod (303), a floating block (304), a connecting rod (305) and a lifting valve flap (306). The three-way liquid inlet pipe (301) is fixed inside the rear wall of the paint tank (201). A pair of mounting seats (302) are respectively provided on the left and right parts of the three-way liquid inlet pipe (301). The rear ends of the four mounting seats (302) are fixed to the inner side of the rear wall of the paint tank (201) and are in the same position from top to bottom. A guide rod (303) is fixed between two mounting seats (302) on a vertical line, and a floating block (304) is slidably sleeved on the outer wall of the two guide rods (303). The floating block (304) floats on the surface of the conductive coating liquid in the coating tank (201). Two connecting rods (305) are fixed on the floating block (304), and a lifting valve flap (306) is fixed on the top of the two connecting rods (305). The lifting valve flap (306) is slidably connected in the front three-way port of the three-way liquid inlet pipe (301).

6. The conductive layer manufacturing and curing device of PET copper foil according to claim 5, characterized in that: The height of the lifting valve flap (306) is greater than the diameter of the horizontal portion of the three-way liquid inlet pipe (301), and the lifting valve flap (306) and the horizontal portion of the three-way liquid inlet pipe (301) are intermittently sealed.

7. The conductive layer manufacturing and curing device of PET copper foil according to claim 1, characterized in that: The leveling and liquid blocking component (4) comprises a hexagonal transmission shaft (401), a bevel gear transmission group (402), a support swivel seat (403), a coating liquid water blocking roller (404) and a spur gear transmission group (405); a hexagonal transmission shaft (401) is rotatably provided through the front part of the coating tank (201); the hexagonal transmission shaft (401) is connected and linked to the film cloth conveying system of the copper foil processing line (1); a pair of support swivel seats (403) are respectively provided on the inner side and the outer side of the left wall of the coating tank (201); two pairs of support swivel seats (403) are provided on the inner side of the right wall of the coating tank (201); and a coating liquid water blocking roller (404) is provided on the outer side of the right wall of the coating tank (201). A pair of supporting rotating seats (403) are arranged, and the positions of the two supporting rotating seats (403) arranged in a pair are both front-to-back corresponding, the supporting rotating seats (403) are fixedly connected to the coating tank (201) through a connecting piece, and a pair of coating water-blocking rollers (404) that rotate in opposite directions are rotatably installed between each pair of the supporting rotating seats (403), and the PET film cloth passes through the five pairs of coating water-blocking rollers (404), and a spur gear transmission group (405) is arranged at the rear end of each pair of the coating water-blocking rollers (404), and a bevel gear transmission group (402) is arranged between the front end of the lower coating water-blocking roller (404) and the outer wall of the hexagonal transmission shaft (401).

8. The conductive layer manufacturing and curing device of PET copper foil according to claim 7, characterized in that: The outer walls of the five upper coating water-blocking rollers (404) are made of silicone rubber, and the outer walls of the five lower coating water-blocking rollers (404) are made of 316 stainless steel. The outer walls of the five lower coating water-blocking rollers (404) are provided with a grid pattern, and a Teflon coating is sprayed on the surface.

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