Manufacturing and curing device for conducting layer of PET copper foil

Abstract

The invention provides a manufacturing and curing device for a conductive layer of a PET copper foil. The manufacturing and curing device is used for solving the problem that two mainstream technical routes of wet coating and dry magnetron sputtering for manufacturing the conductive layer of the PET copper foil in the prior art have obvious limitations. The manufacturing and curing device for the conducting layer of the PET copper foil comprises a conducting layer manufacturing section, an automatic liquid feeding assembly, a leveling and liquid blocking assembly and a coating stirring and filtering assembly, the conducting layer machining procedure is nested in the front portion of pretreatment of a horizontal continuous copper foil plating wire, continuous production from conducting layer machining to copper foil coating is achieved, and the production efficiency is improved. The technological process is shortened, the production cost is reduced, meanwhile, the production space is saved, membrane cloth pollution caused by independent processing and transferring of the membrane cloth is avoided, and the production quality of the PET copper foil is improved.

Description

Technical Field

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

[0002] As the core material of the negative electrode current collector of lithium batteries, PET copper foil needs to meet key performance indicators such as high conductivity, lightness, and strong adhesion. However, since 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 the preparation of PET copper foil conductive layer: wet coating and dry magnetron sputtering, but each has significant limitations: Dry magnetron sputtering: The heat resistance of PET material is not high, and its thermal deformation temperature is about 85°C. The plasma heat load in the sputtering process can easily 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 achieve the conductive layer thickness required for copper foil cladding, and the processing efficiency is low. 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 equipment processing environment for subsequent continuous copper plating of PET film cloth. The two devices work independently, which increases the film cloth winding, packaging and transportation procedures, and cannot achieve continuous production from conductive layer processing to copper foil cladding, which prolongs the process flow and expands the production space.

[0003] Wet coating: The traditional scraper / dip coating process has a significant edge effect and poor coating thickness uniformity, resulting in large differences in local resistance of the conductive layer. The conductive slurry has a high solid content and high viscosity, and is easy to settle. The traditional stirring system has dead corners, which will cause the coating particles to agglomerate, further reducing the deposition uniformity of the conductive layer. In addition, the stirring force of the traditional stirring system is difficult to control, which will affect the continuous transmission of the membrane cloth and even cause damage to the membrane cloth. With the continuous processing of the conductive layer, the membrane cloth will bring in impurities during transmission, causing the conductive slurry to be contaminated. Impurities are mixed in the conductive layer and fixed on the membrane cloth, which will greatly increase the risk of subsequent battery short circuits. Summary of the invention

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a conductive layer manufacturing and curing device for PET copper foil, improve the traditional coating process, enable the conductive layer processing step to be nested in the front part of the pre-treatment of the horizontal continuous copper foil plating line, and realize continuous production from conductive layer processing to copper foil cladding, so as to shorten the process flow, reduce production costs, save production space and improve the production quality of PET copper foil, so as to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a conductive layer manufacturing and curing device for PET copper foil, comprising: a copper foil processing line, wherein a conductive layer manufacturing section 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, and the conductive layer manufacturing section is horizontally connected to the unwinding end of the copper foil processing line, and the drying section is horizontally fixedly connected to the pre-processing section of the copper foil processing line; The copper foil processing line is used for pre-treatment, copper electroplating and post-treatment of PET copper foil electroplating thickened copper layer production; The conductive layer making section 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 includes a coating tank, a cover plate, a liquid outlet and a film cloth conveying slot. The upper part of the coating tank is hinged with a cover plate, and the bottom of the coating tank is provided with two liquid outlets. The left and right walls of the coating tank are horizontally provided with film cloth conveying slots, and the PET film cloth passes through the two film cloth conveying slots. The rear wall of the paint tank is provided with two automatic liquid inlet components, the paint tank is provided with a leveling liquid blocking component in the left and right directions, and the paint tank is provided with a paint stirring and filtering component; The automatic liquid inlet assembly is used to utilize the buoyancy of the conductive paint in the paint tank to achieve automatic addition of the paint and ensure the liquid level of the conductive paint in the paint tank; The leveling and liquid blocking component is used to scrape a uniform layer of conductive coating on the surface of the PET film cloth, prevent the conductive coating from flowing out along with the PET film cloth, and squeeze and isolate the conductive coating in the coating tank; The paint stirring and filtering assembly is used to stir the paint and filter impurities in the paint, control the paint to keep flowing without generating bubbles and without affecting the transmission of the PET film cloth, and evenly distribute the paint in the paint tank to avoid precipitation.

[0006] Optionally, the automatic liquid inlet 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. A three-way liquid inlet pipe is fixed in the rear wall of the paint tank, and a pair of mounting seats are respectively provided 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 paint tank, and a guide rod is fixed between two mounting seats that are on the same vertical line above and below. A floating block is slidably sleeved on the outer walls of the two guide rods, and the floating block floats on the liquid surface of the conductive paint in the paint tank. Two connecting rods are fixed on the floating block, and lifting valve flaps are fixed on the top of the two connecting rods. The lifting valve flap is slidably connected in the front three-way opening of the three-way liquid inlet pipe.

[0007] Optionally, the height of the lifting valve flap is greater than the diameter of the horizontal portion of the three-way liquid inlet pipe, and the lifting valve flap is intermittently sealed to the horizontal portion of the three-way liquid inlet pipe.

[0008] Optionally, the leveling and liquid-blocking assembly includes a hexagonal transmission shaft, a bevel gear transmission group, a support swivel, a coating liquid water-blocking roller and a spur gear transmission group, a hexagonal transmission shaft is rotatably arranged through the front part of the coating tank, the hexagonal transmission shaft is connected and linked to the film cloth transmission system of the copper foil processing line, a pair of support swivels are respectively arranged on the inner and outer sides of the left wall of the coating tank, two pairs of support swivels are arranged on the inner side of the right wall of the coating tank, a pair of support swivels are arranged on the outer side of the right wall of the coating tank, and the positions of the two support swivels arranged in a pair are both front and back corresponding, the support swivels are fixedly connected to the coating tank through a connecting piece, a pair of coating liquid water-blocking rollers that rotate in opposite directions are rotatably installed between each pair of the support swivels, and the PET film cloth passes through five pairs of coating liquid water-blocking rollers, a spur gear transmission group is arranged at the rear end of each pair of the coating liquid water-blocking rollers, and a bevel gear transmission group is arranged between the front end of the lower coating liquid water-blocking roller and the outer wall of the hexagonal transmission shaft.

[0009] Optionally, the outer walls of the five upper coating water-retaining rollers are made of silicone, and the outer walls of the five lower coating water-retaining rollers are made of 316 stainless steel. The outer walls of the five lower coating water-retaining rollers are provided with a grid pattern, and a Teflon coating is sprayed on the surface.

[0010] Optionally, the paint stirring and filtering assembly includes a variable frequency speed regulating motor, a spiral stirring paddle, a guide plate, a first filter mesh cylinder, a second filter mesh cylinder and a third filter mesh cylinder. The variable frequency speed regulating motor is installed on the outer side of the left wall of the paint tank through a connecting piece, and 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 is controlled by the output of the meshing gear set to have two spiral stirring paddles, and the left and right ends of the spiral stirring paddles are respectively rotatably installed in the left and right walls of the paint tank, and two guide plates are fixedly installed between the left and right walls of the paint tank, and the peripheries of the two spiral stirring paddles are respectively provided with the first filter mesh cylinder, the second filter mesh cylinder and the third filter mesh cylinder.

[0011] Optionally, the unit mesh sizes of the first filter mesh cylinder, the second filter mesh cylinder and the third filter mesh cylinder are arranged from large to small, the two guide plates are tilted 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 forty-five degrees. The two guide plates, the PET film cloth passing through the paint tank and the paint tank wall divide the lower part of the paint tank into two left and right spaces that do not interfere with each other, and the two spiral stirring paddles are respectively arranged in the two spaces, and the two spiral stirring paddles drive the conductive paint in the paint tank to form two independent and oppositely flowing liquid circulations.

[0012] Optionally, the components of the first filter mesh cylinder, the second filter mesh cylinder and the third filter mesh cylinder are the same, and the second filter mesh cylinder includes a filter cylinder body, a guide slider, a handle, a fixed seat, a one-way door, a rotating shaft, a limit slot, a spring mounting slot and a torsion spring, and three guide sliders are fixed to the outer walls of the left and right ends of the filter cylinder body at equal distances, and the filter cylinder body is slidably connected to the left and right walls of the paint tank through the three guide sliders at the left end and the three guide sliders at the right end, respectively, a handle is fixedly installed on the left end of the filter cylinder body, and the filter opening of the filter cylinder body is A fixed seat is provided on the side, and a one-way door is hinged on the fixed seat through a rotating shaft. The one-way door and the filter opening of the filter cylinder are rotated and closed. A limiting slot is provided on the inner wall of the filter cylinder on the other side of the filter opening away from the hinged one-way door, and the movable side of the one-way door is intermittently rotated and clamped in the limiting slot. A interconnected spring mounting slot is provided 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 mounting slot, the fixed end of the torsion spring abuts against the fixed seat, and the rebound end of the torsion spring abuts against the rotating end of the one-way door.

[0013] Optionally, the one-way door is a solid plate made of PEEK material, and the one-way doors of the first filter grid cylinder, the second filter grid cylinder and the third filter grid cylinder are all arranged facing the flow direction of the liquid circulation.

[0014] As described above, the conductive layer manufacturing and curing device of the PET copper foil of the present invention has at least the following beneficial effects: 1. By nesting the conductive layer processing procedure in the front part of the pre-treatment of the horizontal continuous copper foil plating line, the continuous production from conductive layer processing to copper foil is realized, which shortens the process flow and reduces production costs, saves production space and avoids the pollution of the membrane caused by independent processing and transportation of the membrane, thus improving the production quality of PET copper foil; 2. The automatic liquid inlet component uses the buoyancy of the conductive paint in the paint tank to achieve automatic addition of the paint, ensuring the conductive paint liquid level in the paint tank, so that the membrane cloth is always immersed in the conductive slurry during the transmission process, automatically adheres, and ensures the processing effect of the PET conductive layer; 3. The leveling liquid blocking component can scrape a uniform layer of conductive coating on the surface of the PET film cloth, and prevent the conductive coating from flowing out with the PET film cloth, squeeze and isolate the conductive coating in the coating tank, avoid the use of traditional coating process, make the coating thickness uniform, the local resistance difference of the conductive layer of the PET copper foil is small, and the safety is strong; 4. The paint stirring and filtering assembly is used to stir the paint, control the paint to keep flowing without generating bubbles, affecting the transmission of the PET film cloth and leaving no dead corners, and evenly distribute the paint in the paint tank to avoid precipitation, thereby improving the deposition uniformity of the conductive layer; 5. The one-way door and filter grid cylinder can filter impurities in the paint and allow impurities to enter but not exit, reducing the risk of subsequent battery short circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a southeast perspective stereogram of the overall structure of the present invention.

[0016] Figure 2 Shown is a front view schematic diagram of the overall structure of the present invention.

[0017] Figure 3 The southwest perspective view shows a structure of a conductive layer manufacturing segment according to the present invention.

[0018] Figure 4 Shown is a left-side schematic diagram of the installation positions of the paint tank, the automatic liquid inlet component and the paint stirring and filtering component of the present invention.

[0019] Figure 5 Shown is a southeast perspective stereogram of the automatic liquid inlet component structure of the present invention.

[0020] Figure 6 Shown is a left side cross-sectional view of the automatic liquid inlet component structure of the present invention.

[0021] Figure 7 Shown is a front cross-sectional view of the automatic liquid inlet component structure of the present invention.

[0022] Figure 8 Shown is a southwest perspective stereoscopic view of the shoe leveling and liquid retaining assembly structure of the present invention.

[0023] Fig. 9 The southwest perspective view of the paint agitation and filtering assembly structure of the present invention is shown.

[0024] Fig.10 It is a northeast perspective stereogram of the first filter grid tube structure on the right side of the present invention.

[0025] Fig.11 Shown as the present invention Fig.10 A magnified view of the structure of region A.

[0026] Fig.12 Shown is a left perspective view of the first filter grid cartridge structure on the right side of the present invention.

[0027] Fig.13 Shown as the present invention Fig.12 A magnified view of the structure of region B.

[0028] Fig.14 A left perspective view showing the flow circulation of the conductive paste in the coating tank of the present invention is shown.

[0029] Fig.15Shown is a top view schematic diagram of a conductive layer manufacturing segment structure of the present invention.

[0030] Fig.16 Shown is a left perspective view of a conductive layer manufacturing segment structure of the present invention.

[0031] Component number description 1. Copper foil processing line; 2. Conductive layer production section; 201. Coating tank; 202. Cover plate; 203. Liquid outlet; 204. Membrane cloth conveying slot; 3. Automatic liquid inlet assembly; 301. Three-way liquid inlet pipe; 302. Mounting seat; 303. Guide rod; 304. Float; 305. Connecting rod; 306. Lifting valve disc; 4. Leveling and liquid retaining assembly; 401. Hexagonal transmission shaft; 402. Bevel gear transmission group; 403. Support swivel seat; 404. Liquid coating and water retaining roller; 405. Spur gear transmission group; 5. Paint stirring and filtering assembly; 501. Variable frequency speed regulating motor; 502. Spiral stirring paddle; 503. Guide plate; 504. First filter mesh cylinder; 505. Second filter mesh cylinder; 506. Third filter mesh cylinder; 5041. filter cylinder; 5042. guide slider; 5043. handle; 5044. fixing seat; 5045. one-way door; 5046. rotating shaft; 5047. limit slot; 5048. spring installation slot; 5049. torsion spring. DETAILED DESCRIPTION

[0032] The present invention is 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 implement it, but the embodiments are not intended to limit the present invention.

[0033] As the background technology, the current dry magnetron sputtering technology for preparing the conductive layer of PET copper foil has the following problems: the heat resistance of PET material is not high, the thermal deformation temperature is low, and the plasma heat load in the sputtering process easily causes the PET substrate to shrink, which reduces 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 achieve the conductive layer thickness required for copper foil cladding, and the processing efficiency is low; and 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 PET film cloth continuous copper plating equipment. The two devices work independently, which increases the film cloth winding, packaging and transportation procedures, and cannot achieve continuous production from conductive layer processing to copper foil cladding, which prolongs the process flow and expands the production space. In addition, the current wet coating technology for preparing the conductive layer of PET copper foil also has problems: the edge effect of the traditional scraper / dip coating process is significant, and the coating thickness uniformity is poor, resulting in large differences in local resistance of the conductive layer; the conductive slurry has a high solid content and high viscosity, and the conductive slurry is easy to settle. The traditional stirring system has dead corners, which will cause the coating particles to agglomerate, further reducing the deposition uniformity of the conductive layer, and the stirring force of the traditional stirring system is difficult to control, which will affect the continuous transmission of the membrane cloth and even cause damage to the membrane cloth; with the continuous processing of the conductive layer, the membrane cloth will bring in impurities during transmission, causing the conductive slurry to be contaminated, and the impurities are mixed in the conductive layer and fixed on the membrane cloth, which will greatly increase the risk of subsequent battery short circuits. Example 1

[0034] like Figure 1-Figure 4 , Fig.14 and Fig.16 As shown, in order to solve the above problems, the inventors improved the traditional coating process and nested the conductive layer processing process in the pre-treatment front part of the horizontal continuous copper foil plating line, thereby realizing continuous production from conductive layer processing to copper foil cladding, shortening the process flow, reducing production costs, saving production space and improving the production quality of PET copper foil. Thus, a conductive layer manufacturing and curing device for PET copper foil was invented, comprising: a copper foil processing line 1, a conductive layer manufacturing section 2 and a drying section are arranged from left to right between the unwinding end and the pre-treatment processing section of the copper foil processing line 1, and the conductive layer manufacturing 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-treatment 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 thickening copper layer production; Conductive layer making section 2 is used to apply conductive coating on the surface of PET film cloth, 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 includes a coating tank 201, a cover plate 202, a liquid outlet 203 and a membrane cloth conveying groove 204. The upper part of the coating tank 201 is hinged with the cover plate 202, and 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 grooves 204, and the PET membrane cloth passes through the two membrane cloth conveying grooves 204.

[0035] When in 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 making section 2, and the upper and lower surfaces of the film cloth are evenly coated with conductive coating, and then the film cloth continues to be transmitted to the right and enters the drying section, and the conductive coating on the upper and lower surfaces of the film cloth is air-dried and fixedly deposited on the surface of the film cloth to form a PET film cloth with a conductive layer, which is transported into the processing section of the copper foil processing line 1 for electroplating copper foil on the conductive layer. In this way, continuous production from conductive layer processing to copper foil is realized, the process flow is shortened, the production and processing costs are reduced, there is no need to provide independent equipment and sites for conductive layer processing, production space is saved, and film cloth contamination caused by independent processing and transportation of the film cloth is avoided, thereby improving the production quality of PET copper foil. Example 2

[0036] See also Figure 3-Figure 7 and Figure 14-16 The 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.

[0037] More perfectly, if Figure 6-Figure 7As 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.

[0038] 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. Example 3

[0039] See also Figure 3 , Figure 8 and Figure 14-16The present invention provides a conductive layer manufacturing and curing device for PET copper foil, which also includes: a leveling liquid blocking component 4, a leveling liquid blocking component 4 is arranged in the coating tank 201 in the left and right directions, the leveling liquid blocking component 4 is used to scrape a uniform conductive coating on the surface of the PET film cloth, and prevent the conductive coating from flowing out with the PET film cloth, and squeeze and isolate the conductive coating in the coating tank 201, the leveling liquid blocking component 4 includes a hexagonal transmission shaft 401, a bevel gear transmission group 402, a support rotating seat 403, a coating liquid water blocking roller 404 and a spur gear transmission group 405, a hexagonal transmission shaft 401 is arranged in rotation at the front of the coating tank 201, the hexagonal transmission shaft 401 is connected to the film cloth transmission system of the copper foil processing line 1 and linked, a pair of support rotating seats 403 are respectively arranged on the inner and outer sides of the left wall of the coating tank 201, two pairs of support rotating seats 403 are arranged on the inner side of the right wall of the coating tank 201, and a pair of support rotating seats 403 are arranged on the outer side of the right wall of the coating tank 201, and two support rotating seats 403 are arranged in a pair. The positions of the support rotating seats 403 are all front and back corresponding, and the support rotating seats 403 are fixedly connected to the coating tank 201 through a connecting piece. A pair of coating liquid water retaining rollers 404 that rotate in opposite directions are rotatably installed between each pair of support rotating seats 403, and the PET film passes through the five pairs of coating liquid water retaining rollers 404. A spur gear transmission group 405 is arranged at the rear end of each pair of coating liquid water retaining rollers 404, and a bevel gear transmission group 402 is arranged between the front end of the lower coating liquid water retaining roller 404 and the outer wall of the hexagonal transmission shaft 401. The hexagonal transmission shaft 401 is synchronously linked with the film cloth conveying system of the copper foil processing line 1. While ensuring that the processing and conveying frequency of the conductive film cloth in the conductive layer production section 2 is synchronized with the processing frequency of the copper foil processing line 1, it also provides power for the bevel gear transmission group 402, so that the transmission of the bevel gear transmission group 402 and the spur gear transmission group 405 cooperate, driving the upper coating water retaining roller 404 of each pair of coating water retaining rollers 404 to rotate counterclockwise, and the lower coating water retaining roller 404 to rotate clockwise synchronously.

[0040] More perfectly, if Figure 8 As shown, the outer wall material of the upper five coating water-retaining rollers 404 is silicone, which increases the friction of transmission, and the material of the lower five coating water-retaining rollers 404 is 316 stainless steel, and the outer wall of the lower five coating water-retaining rollers 404 is provided with a grid pattern, and the surface is sprayed with Teflon coating, which ensures that when the membrane cloth passes through, the grid pattern makes the conductive coating evenly distributed on the surface of the membrane cloth.

[0041] Specifically, the processing and transmission frequency of the conductive film cloth in the conductive layer production section 2 is the same as the processing frequency of the copper foil processing line 1. The hexagonal transmission shaft 401 is linked to provide power for the bevel gear transmission group 402, so that the transmission of the bevel gear transmission group 402 and the spur gear transmission group 405 cooperate, driving the upper coating water retaining roller 404 of each pair of coating water retaining rollers 404 to rotate counterclockwise, and the lower coating water retaining roller 404 rotates clockwise synchronously. The PET film cloth passing through is driven by the rotation to move continuously to the right, while avoiding the nozzle The use of traditional spraying devices such as spray tubes can automatically squeeze and push away excess conductive coating on the membrane cloth, and smooth it out to make the conductive coating evenly distributed on the membrane cloth; and five pairs of coating liquid water-blocking rollers 404 are respectively arranged inside and outside the two membrane cloth conveying grooves 204, which also play a role of blocking liquid, isolating the conductive coating in the coating groove 201 to prevent the conductive coating from flowing out when the membrane cloth is conveyed; in this way, the use of traditional coating technology is avoided, the coating thickness is highly uniform, the local resistance difference of the conductive layer of the PET copper foil is small, and the safety is strong. Example 4

[0042] See also Figure 3-Figure 4 and Figure 9-Figure 16 The present invention provides a conductive layer manufacturing and curing device for PET copper foil, which also includes: a coating stirring and filtering component 5, a coating stirring and filtering component 5 is arranged in a coating tank 201, and the coating stirring and filtering component 5 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 film cloth, and evenly distribute the coating in the coating tank 201 to avoid precipitation. The coating stirring and filtering component 5 includes 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. The left wall of the coating tank 201 is provided with a variable frequency speed regulating motor 501 through a connecting piece. Motor 501, 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 is controlled by the meshing gear group output and has two spiral stirring paddles 502, and the left and right ends of the spiral stirring paddles 502 are rotatably installed in the left and right walls of the paint tank 201 respectively, and two guide plates 503 are fixedly installed between the left and right walls of the paint tank 201, and the guide plates 503 play a certain isolation role to prevent the conductive paint flow circulation at the front and rear of the paint tank 201 from interfering with each other, and the peripheries of the two spiral stirring paddles 502 are respectively provided with a first filter grid cylinder 504, a second filter grid cylinder 505 and a third filter grid cylinder 506.

[0043] Furthermore, if Figure 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 second filter mesh cylinder 505 includes 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 installation slot 5048 and a torsion spring 5049. The left and right outer walls of the filter cylinder body 5041 are equidistantly fixed with three guide sliders. Block 5042, and the filter cylinder 5041 is slidably connected to the left wall and the right wall of the paint tank 201 through three guide sliders 5042 at the left end and three guide sliders 5042 at the right end, respectively. A handle 5043 is fixedly installed on the left end of the filter cylinder 5041. The handle 5043 is convenient for workers to hold, slide and install or pull out the filter cylinder 5041 from the paint tank 201, clean the impurities in the dumping cylinder, and a fixed seat 5044 is provided on one side of the filter opening of the filter cylinder 5041. A one-way door 5045 is hinged on the fixed seat 5044 through a rotating shaft 5046. The one-way door 5045 and the filter opening of the filter cylinder 5041 are rotated and closed. A limit card slot 5047 is provided on the inner wall of the filter opening on the filter cylinder 5041 away from the hinged one-way door 5045, and the movable side of the one-way door 5045 is intermittently rotated and engaged in the limit card slot 5047. A connected spring installation slot 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 mounting groove 5048, the fixed end of the torsion spring 5049 abuts against the fixed seat 5044, and the rebound 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 automatically open inward when impacted under the action of the torsion spring 5049, so that impurities in the conductive coating can enter and be filtered and retained by the filter cylinder 5041.

[0044] More perfectly, if Fig. 9 and Fig.14As shown, 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 sets of spiral blades, and the inclination angle of the blades is 45 degrees. The two guide plates 503, the PET film cloth passing through the coating tank 201 and the wall of the coating tank 201 divide the lower part of the coating 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, so that the two The synchronous rotation of the spiral stirring paddles 502 in opposite directions can drive the conductive paint in the paint tank 201 to form two independent liquid circulations with opposite flows, and the liquid flows pass through the first filter mesh cylinder 504, the second filter mesh cylinder 505 and the third filter mesh cylinder 506 in sequence. Due to the size of the mesh, the resistance encountered increases from small to large, and the impact force of the liquid circulation is reduced layer by layer, so that the conductive paint near the membrane cloth flows smoothly and is evenly distributed, avoiding the generation of eddy currents and the introduction of bubbles. The two groups of liquid flows avoid dead corners in the flow of the conductive paint, further ensuring the mixing uniformity of the conductive paint and avoiding deposition.

[0045] More perfectly, if Figure 12-14 As shown, the one-way door 5045 is a solid plate made of PEEK material. 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 set facing the flow direction of the liquid circulation, so as to facilitate the entry of impurities during the circulation of the conductive paint.

[0046] Specifically, the variable frequency speed regulating motor 501 provides power for the opposite rotation of the two spiral stirring paddles 502. The opposite synchronous rotation of the two spiral stirring paddles 502, the three sets of spiral blades with an inclination angle of forty-five degrees, the two guide plates 503 tilted in an "eight" shape, and the membrane cloth passing through the self-leveling liquid blocking component 4 drive the conductive paint in the paint tank 201 to form two independent and oppositely flowing liquid circulations. During the circulation process, the liquid flow impacts the downstream to open the one-way door 5045 in turn, 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 mesh of the first filter mesh cylinder 504, the second filter mesh cylinder 505 and the third filter mesh cylinder 506 The size of the conductive coating is arranged from small to large, and the resistance is from small to large, which can reduce the impact of the liquid circulation layer by layer, so that the conductive coating close to the membrane cloth flows smoothly and is evenly distributed. While stirring the mixed conductive coating, eddy currents and bubbles are avoided. On the other hand, the filter grid cylinder can perform one-way filtering and interception of impurities entering it, and through the one-way self-locking setting of the one-way door 5045, impurities can only enter but not exit. Finally, the two groups of liquid flows avoid dead corners of the conductive coating flow, further ensure the mixing uniformity of the conductive coating, and avoid deposition. In this way, stirring and mixing are combined with liquid circulation filtration, which ensures the uniformity of distribution and cleanliness of the conductive coating, improves the deposition uniformity of the conductive layer, and reduces the risk of short circuit of subsequent batteries.

[0047] Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0048] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed 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 portion of the coating tank (201) is hingedly connected to 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) corresponding to each other; 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, thereby squeezing and isolating 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 to control the paint to maintain flow without generating bubbles or affecting the transmission of the PET film cloth, so as to evenly distribute the paint in the paint tank (201) and avoid sedimentation.

2. 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 at 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. A floating block (304) is slidably sleeved on the outer walls 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). A lifting valve flap (306) is fixed on the top of the two connecting rods (305). The lifting valve flap (306) is slidably connected to the front three-way port of the three-way liquid inlet pipe (301).

3. The conductive layer manufacturing and curing device of PET copper foil according to claim 2, 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.

4. 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 to and linked with 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 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 liquid water-blocking rollers (404) are rotatably installed between each pair of the supporting rotating seats (403) and rotate in contact with each other, and the PET film passes through between the five pairs of coating liquid water-blocking rollers (404), and a spur gear transmission group (405) is arranged at the rear end of each pair of the coating liquid water-blocking rollers (404), and a bevel gear transmission group (402) is arranged between the front end of the lower coating liquid water-blocking roller (404) and the outer wall of the hexagonal transmission shaft (401).

5. The conductive layer manufacturing and curing device of PET copper foil according to claim 4, 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.

6. The conductive layer manufacturing and curing device of PET copper foil according to claim 1, characterized in that: 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 mounted 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 provided with two spiral stirring paddles (502) through output control of a meshing gear set, 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, and 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).

7. The conductive layer manufacturing and curing device of PET copper foil according to claim 6, 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 arranged 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 liquid circulations with opposite directions.

8. The conductive layer manufacturing and curing device of PET copper foil according to claim 7, characterized in that: The first filter mesh cylinder (504), the second filter mesh cylinder (505) and the third filter mesh cylinder (506) have the same components, and the second filter mesh cylinder (505) comprises 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 mounting slot (5048) and a torsion spring (5049). The outer walls of the left and right ends of the filter cylinder (5041) are fixed with three guide sliders (5042) at equal distances, and the filter cylinder (5041) is slidably engaged 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 (5041), and a fixed handle (5043) is provided on one side of the filter opening of the filter cylinder (5041). A fixed seat (5044) is provided with a one-way door (5045) hingedly connected to the fixed 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; a limit slot (5047) is provided on the inner wall of the filter opening on the filter cylinder (5041) which is away from the hinged one-way door (5045); and the movable side of the one-way door (5045) is intermittently rotated and locked in the limit slot (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) abuts against the fixed seat (5044), and the rebound end of the torsion spring (5049) abuts against the rotating end of the one-way door (5045).

9. The conductive layer manufacturing and curing device of PET copper foil according to claim 8, 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.

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