A device for carbon coating of white space of aluminum foil

Abstract

The present application relates to the technical field of aluminum foil carbon coating processing, and specifically discloses an aluminum foil white space carbon coating device, which comprises a machine box, a trough, a coating roller and a back roller. The trough is arranged at the bottom of the machine box, and the lower part of the coating roller is rotatably arranged in the trough. A scraper is arranged in the trough. The end of the scraper near the coating roller is provided with a beveled part. The end of the scraper away from the coating roller is rotatably connected with the trough. Discs are fixed on the shafts at the two ends of the coating roller. The end faces of the discs are provided with special-shaped ring guide grooves. Rotating bars are rotatably connected to the inner wall of the machine box. The ends of the rotating bars are provided with guide pieces corresponding to the special-shaped ring guide grooves. The other ends of the two rotating bars are jointly connected with a swing rod, and the swing rod is provided with a long slot. The present application can effectively prevent the aluminum foil surface from being unevenly coated with carbon due to abnormal speed fluctuation of the coating roller, effectively guaranteeing the product quality of the carbon-coated aluminum foil and the running stability of the whole device.

Description

Technical Field

[0001] This invention relates to the field of aluminum foil carbon coating technology, and specifically discloses an aluminum foil carbon coating device with blank space. Background Technology

[0002] Carbon-coated aluminum foil, as an important material for new energy vehicle battery cells, has seen rapid development in recent years. Carbon coating with blank spaces is a special process where, during the carbon coating process, evenly spaced gaps are left between the carbon paste coating layers. This facilitates subsequent cutting of the carbon-coated aluminum foil and reduces waste of carbon paste material.

[0003] Existing aluminum foil blanking carbon coating equipment sets up a scraper near the coating roller, and pushes the scraper to contact the surface of the coating roller for a short period of time through a cylinder. During the contact period between the scraper and the coating roller, part of the paste on the surface of the coating roller is scraped off, and then transferred to the surface of the aluminum foil to achieve the effect of leaving blank areas.

[0004] For example, utility model patent application number 2021210479431 discloses a coating roller-type transfer coating device with blanking, including an unwinding device, a drying box, a web-correcting and rewinding device, and a coating device. The coating device includes a coating roller and a back roller. A comma roller is located directly above the coating roller, a fixed hopper is located to the upper left of the coating roller, and a blanking scraper is located to the upper right of the coating roller. The blanking scraper has a collection cavity, which is connected to a slurry recovery pipe. A conveying pump is installed on the slurry recovery pipe, and the outlet end of the slurry recovery pipe is connected to the inlet of the fixed hopper. During operation, the coating device disclosed in this patent scrapes off excess slurry from the surface of the coating roller using the comma roller to achieve uniform coating. Simultaneously, the movement of the blanking scraper near or away from the coating roller creates blanking on the surface of the coating roller, thereby achieving the effect of carbon coating with blanking on the aluminum foil surface. While this coating equipment achieves uniform carbon coating and a blanking effect on aluminum foil, both the coating roller and the blanking blade are controlled by independent drive devices. The rotation of the coating roller is driven by a motor; any voltage fluctuation will change the roller speed. In this case, the cylinder's action on the blanking blade cannot be adjusted in time, easily leading to inconsistent arc length of the blanking area on the coating roller surface. This results in inconsistent width of the blanking area transferred onto the aluminum foil, affecting the carbon coating effect. Secondly, the blanking blade requires frequent reciprocating pushing and retracting by the cylinder. Long-term operation can cause cylinder malfunctions, requiring the entire carbon coating equipment to be shut down for maintenance, severely impacting operational efficiency. Based on the above shortcomings of existing roller-type blanking transfer coating equipment, this application proposes an aluminum foil blanking carbon coating device that can effectively solve the aforementioned technical problems. Summary of the Invention

[0005] The present invention aims to provide an aluminum foil blanking and carbon coating device, so as to realize the blanking and uniform material action of the scraper and the rotation process of the coating roller in linkage, thereby avoiding the technical problems caused by using two independent drive devices to control the scraper and the coating roller.

[0006] This invention is achieved through the following technical solution: A device for carbon coating with blanking on aluminum foil includes a machine casing, a material trough, a coating roller, and a back roller. The material trough is located at the bottom of the machine casing. The lower side of the coating roller is rotatably mounted in the material trough, and a drive device is connected to the roller shaft at one end of the coating roller. The back roller is located directly above the coating roller. A scraper is provided in the material trough. The scraper end near the coating roller is provided with a beveled blade. The end of the scraper away from the coating roller is rotatably connected to the material trough. Both ends of the coating roller are concentrically fixed with discs. The end face of the discs is provided with irregular ring guide grooves. The irregular ring guide grooves include long arc segments and short arc segments with concentricity and unequal diameters. A connecting section is provided between the two ends of the long arc segments and the short arc segments. Rotating bars are rotatably connected to the inner walls of the machine box on the front and rear sides of the scraper by torsion springs. One end of the rotating bar is provided with a guide member that interacts with the corresponding irregular ring guide groove. The other ends of the two rotating bars are connected to a swing rod. The swing rod has a long slot for passing through the scraper.

[0007] As a further feature of the above scheme, the radius of the long arc segment is smaller than that of the short arc segment. When the guide member interacts with the long arc segment, the oblique blade at the end of the scraper does not contact the roller surface of the coating roller. When the guide member interacts with the short arc segment, the oblique blade at the end of the scraper contacts the roller surface of the coating roller.

[0008] As a further feature of the above solution, an upper limiting member and a lower limiting member for rotating and limiting the scraper are fixedly installed above and below the scraper, respectively.

[0009] As a further feature of the above solution, blanking scrapers are provided on both the front and rear sides above the scraper, and a second telescopic drive component is provided in the machine housing to push the blanking scrapers toward both ends of the coating roller body.

[0010] As a further provision of the above scheme, the chassis is provided with a first telescopic drive member that pushes the back roller toward or away from the top of the coating roller.

[0011] As a further provision of the above scheme, a drying chamber is provided in the machine box located above the back roller, and the upper and lower ends of the drying chamber are provided with openings for aluminum foil to pass through. The drying chamber is provided with a hot air circulation mechanism that blows hot air onto the carbon coating layer on the surface of the aluminum foil.

[0012] As a further provision of the above scheme, the hot air circulation mechanism includes a gas heating box disposed at the lower end of the drying chamber and an arc-shaped guide plate disposed at the upper end of the drying chamber. The outer side of the drying chamber is provided with an exhaust pipe corresponding to the arc-shaped guide plate and an air supply pipe corresponding to the gas heating box. A circulation duct is connected between the outer ends of the exhaust pipe and the air supply pipe. A drying filter and a circulation fan are disposed on the circulation duct.

[0013] As a further feature of the above solution, the gas heating box is equipped with a heating wire inside, and the side of the gas heating box facing the aluminum foil has an air outlet.

[0014] As a further provision of the above scheme, the lower end of the material trough is connected to a conveying pipe, the end of the conveying pipe is connected to a carbon slurry tank, and a conveying pump is installed on the conveying pipe.

[0015] As a further provision of the above scheme, the chassis is provided with a feed guide roller near the feed inlet of the chassis and a discharge guide roller near the discharge outlet of the chassis, and guide rollers are provided in the chassis on both sides above the back roller.

[0016] In the aluminum foil carbon coating device disclosed in this invention, during operation, the aluminum foil is pressed down by the back roller until it contacts the top of the coating roller. Then, during the traction process, the coating roller rotates at the same speed, and the carbon paste on the surface of the coating roller is transferred to the surface of the aluminum foil through the imprinting process.

[0017] During the rotation of the coating roller, the guide at the end of the rotating bar is always located in the irregular ring guide groove on the disc. When the guide interacts with the long arc segment in the irregular ring guide groove, the rotating bar and swing rod push the oblique blade on the scraper downwards, leaving a certain uniform material gap between the oblique blade and the coating roller. At this time, when the coating roller rotates, excess carbon paste on its surface will be scraped off, resulting in a uniform carbon paste layer thickness on the coating roller surface, ensuring the effect of subsequent carbon paste transfer to the aluminum foil surface. When the guide interacts with the short arc segment in the irregular ring guide groove, the rotating bar and swing rod push the oblique blade on the scraper upwards, resulting in direct contact between the oblique blade and the coating roller. At this time, when the coating roller rotates, all the carbon paste on its surface will be scraped off, leaving a blank area on the surface of the coating roller. This blank area will be left blank when the carbon paste coating is transferred to the aluminum foil surface.

[0018] In addition, during the coating process of the coating roller, the blanking scrapers at both ends will adhere to both ends of the outer roller surface of the coating roller, thereby scraping off both ends of the carbon paste layer on the surface of the coating roller, thus ensuring the coating effect of the front and rear ends of the aluminum foil after the carbon paste layer is transferred.

[0019] Finally, the aluminum foil after carbon coating is directly placed into the drying oven, where a hot air circulation mechanism continuously blows hot air onto the carbon coating layer on the aluminum foil surface to achieve rapid drying of the carbon paste layer. This prevents the carbon paste from transferring due to contact with the guide rollers during the subsequent guiding and traction process, thereby effectively ensuring the product quality of the final carbon-coated aluminum foil.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects: This invention utilizes a coordinated design between the scraper, rotating bar, swing rod, guide component, and irregularly shaped ring guide groove. This design ensures that each rotation of the coating roller creates a fixed blank area on its surface, which is then transferred to the aluminum foil surface to form a fixed-length blank carbon coating layer. This not only ensures stable carbon coating on the aluminum foil surface but also maintains consistency between the scraper's blanking action and the coating roller's action. This effectively prevents inconsistent blank widths caused by abnormal roller speed fluctuations, thus guaranteeing the quality of the carbon-coated aluminum foil. Furthermore, it effectively overcomes the limitations of existing systems where the scraper is continuously driven by a cylinder, leading to cylinder malfunctions and equipment downtime for maintenance. This ensures the overall stability of the entire system.

[0021] The scraper in this invention, under the transmission action between the rotating bar, the swing rod, the guide member, and the shaped ring guide groove, can switch back and forth between contacting the surface of the coating roller or maintaining a stable gap. This not only enables it to have the function of carbon coating and leaving blank on aluminum foil, but also to effectively control the thickness of the carbon paste layer, so that the thickness of the carbon paste layer transferred to the aluminum foil surface is stable and consistent. There is no need to set up a comma roller or other uniform material mechanism, which simplifies the structure of the entire blank carbon coating device and reduces its manufacturing and use costs.

[0022] In this invention, whether scraping material in a blanking process or scraping material evenly, the scraped carbon slurry can fall directly into the material tank for continued use, without causing waste of raw materials.

[0023] The blanking scraper in this invention can also scrape off the carbon paste coating at both ends of the roller body during the rotation of the coating roller, maintaining the stability of the carbon paste coating at both ends transferred to the aluminum foil surface, improving the final product quality of carbon-coated aluminum foil, and the scraped carbon paste will also fall directly into the material tank for continued use, realizing the full utilization of raw materials.

[0024] This invention, through the design of a drying oven, a gas heating box, an arc-shaped guide plate, a drying filter, and a circulating fan, not only enables the direct drying of the carbon-coated aluminum foil coating, avoiding the transfer between the traction and guide rollers due to the carbon slurry layer not being dried, thus further ensuring the product quality of the carbon-coated aluminum foil, but also enables the secondary utilization of heat energy in the drying hot air, reducing the power consumption during the carbon coating and drying process of aluminum foil, thus achieving energy saving and emission reduction effects. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a frontal perspective view of the present invention; Figure 2 This is a three-dimensional structural diagram of the back of the present invention; Figure 3 This is a three-dimensional structural diagram of the internal structure of the chassis of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the material trough, coating roller, back roller, etc. in this invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the disc, scraper, rotating bar, etc. in this invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the material trough, coating roller, and blanking scraper in Embodiment 2 of the present invention; Figure 7 This is a three-dimensional structural diagram of the drying oven, air supply pipe, exhaust pipe, etc. in Embodiment 3 of the present invention; Figure 8 This is a three-dimensional structural diagram of the gas heating box, heating wire, etc. in Embodiment 3 of the present invention; Figure 9 This is a schematic diagram of the planar structure when the doctor blade and the coating roller are in direct contact in this invention; Figure 10 This is a schematic diagram of the planar structure when there is a gap between the doctor blade and the coating roller in this invention. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-10 This application will be described in detail with reference to the embodiments. Example 1

[0029] Example 1 discloses an aluminum foil carbon coating device for leaving blank areas, see attached drawing. Figure 1-3 It includes a chassis 1, a control cabinet 2, and a carbon slurry tank 3. A feed inlet is provided on the left side of the chassis 1, and a discharge outlet is provided at the upper part of the right side. A feed guide roller 4 is installed inside the chassis 1 at the feed inlet, and a discharge guide roller 5 is installed inside the chassis 1 at the discharge outlet.

[0030] A material trough 5 is provided at the bottom of the casing 1. A coating roller 6 is rotatably mounted at the lower left end of the material trough 5, with its lower left side extending into the material trough 5. This allows the coating roller 6 to adhere the carbon paste from the material trough 5 to its outer roller surface during rotation. Roller shafts 601 are provided at both the front and rear ends of the coating roller 6. The rear roller shaft 601 extends out of the casing 1 and is connected to a drive device 7, which consists of a gearbox and a motor. A first bracket 8 is fixed in the casing 1 directly above the coating roller 6. A first cylinder 9 is mounted on the first bracket 8. In this embodiment, there is one first cylinder 9 at the front and one at the rear. A roller frame 10 is connected to the lower ends of both first cylinders 9, and a back roller 11, which works in conjunction with the coating roller 6, is rotatably mounted in the roller frame 10. Under the push of the first cylinders 9, the lower end of the back roller 11 is brought into contact with the upper end of the coating roller 6, creating a gap between them for the transfer of the aluminum foil 100 and the carbon paste layer. In addition, guide rollers 12 are provided above the left and right sides of the back roller 11. Under the action of the two guide rollers 12, the aluminum foil can form a certain wrap angle with the lower end of the back roller 11 and fit tightly with the lower half of the back roller 11.

[0031] Reference Appendix Figure 4 Appendix Figure 5 Appendix Figure 9 and attached Figure 10 A scraper 13 is installed in the upper opening of the material trough 5. The end of the scraper 13 away from the coating roller 6 is rotatably connected to the material trough 5, and the lower surface of the end of the scraper 13 near the coating roller 6 is provided with a beveled blade 131. When the scraper 13 rotates upward around the rotatable connection point by a certain angle, the beveled blade 131 can be made to fully contact the surface of the coating roller 6. At this time, the carbon paste adhering to the surface of the coating roller 6 can be completely scraped off when rotating past the beveled blade 131, thus leaving the roller body blank. When the scraper 13 rotates downward around the rotatable connection point by a certain angle, a certain gap will be formed between the beveled blade 131 and the surface of the coating roller 6. At this time, the carbon paste adhering to the surface of the coating roller 6 can be scraped off by the beveled blade 131 when rotating past the beveled blade 131, thus achieving a uniform material distribution.

[0032] A disc 14 is concentrically fixed on the roller shaft 601 at both ends of the coating roller 6. An irregular ring guide groove 15 is formed on the outer end face of the two discs 14. The irregular ring guide groove 15 includes a long arc segment 151 and a short arc segment 152 arranged concentrically. The diameter of the short arc segment 152 is larger than the diameter of the long arc segment 151. A connecting section 153 is provided between the two ends of the long arc segment 151 and the short arc segment 152. An angle of about 3-5° is left between the connecting section 153 and the line connecting the end point and the center of the circle to avoid the guide 18 from jerking during the switching process of the connecting section 153. Rotating bars 16 are rotatably connected to the inner walls of the housing 1 at the front and rear positions of the scraper 13 via torsion springs. A guide member 18 is provided at one end of the rotating bar 16, which interacts with the guide groove 15 of the irregular ring. The guide member can be a guide protrusion or a guide wheel. A swing rod 17 is rotatably connected between the other ends of the two rotating bars 16, and a long strip opening 171 for penetrating the scraper 13 is provided on the swing rod 17.

[0033] In this embodiment, the disc 14 rotates synchronously with the coating roller 6. When the long arc segment 151 interacts with the guide member 18, the inclined blade 131 on the scraper 13 is pushed downward by the action of the rotating bar 16 and the swing rod 17, so that a certain material distribution gap is left between the inclined blade 131 and the coating roller 6 (see appendix). Figure 9 Therefore, excess carbon paste on the surface of the coating roller 6 can be scraped off, achieving uniform material distribution; when the short arc segment 152 interacts with the guide member 18, the inclined blade 131 on the scraper 13 can be pushed upward by the action of the rotating bar 16 and the swing rod 17, so that the inclined blade 131 directly contacts the outer surface of the coating roller 6 (see appendix). Figure 10 At this point, the oblique blade 131 can scrape off all the carbon paste on the surface of the coating roller 6, leaving a blank on the surface of the coating roller 6. In addition, in order to prevent the scraper 13 from rotating excessively under the action of the swing rod 17, an upper limiting member 19 and a lower limiting member 20 are fixed above and below the scraper 13, respectively.

[0034] Finally, see the attached document. Figure 1 and attached Figure 3 A conveying pump 21 is installed on one side of the carbon slurry tank 3. A conveying pipe 22 is installed on the conveying pump 21. One end of the conveying pipe 22 is connected to the carbon slurry tank 3, and the other end is connected to the lower end of the material tank 5, so that the carbon slurry in the material tank 5 can be replenished in time when the level is low. Example 2

[0035] Example 2 discloses an aluminum foil blanking carbon coating device that is an improved design based on Example 1. The similarities between it and Example 1 will not be described again.

[0036] Reference Appendix Figure 6In this embodiment 2, a second bracket 23 is fixedly installed inside the housing 1 directly above the scraper 13. A second cylinder 24 is installed at both the front and rear ends of the second bracket 23. Specifically, the first cylinder 9 and the second cylinder 24 can be replaced by other telescopic drive components, such as electric cylinders, hydraulic cylinders, or electric push rods. A blanking scraper 25 is connected to the upper left end of each of the two second cylinders 24. The inner side of the blanking scraper 25 is configured as an arc shape that matches the outer circular surface of the coating roller 6, and its lower end is configured as a corresponding oblique blade.

[0037] In the aluminum foil blanking carbon coating device of this embodiment 2, during operation, the second cylinder 24 pushes the two blanking scrapers 25 toward the coating roller 6, so that they are tightly attached to the front and rear ends of the outer circular surface of the coating roller 6. Then, during the rotation of the coating roller 6, the blanking scrapers 25 can scrape off all the excess carbon paste at both ends, ensuring the coating effect of the front and rear ends of the aluminum foil. Example 3

[0038] Example 3 discloses an aluminum foil blanking carbon coating device further designed based on Example 1 or Example 2, and the differences between it and Example 1 or Example 2 will not be described again.

[0039] Reference Appendix Figure 3 Appendix Figure 7 and attached Figure 8 In this embodiment 3, a drying box 26 is provided above the right side of the coating roller 6. The upper and lower surfaces of the drying box 26 are provided with aligned openings so that the aluminum foil after carbon coating can be pulled through the drying box 26 for drying. After drying, the aluminum foil is guided by the guide roller 12 above the drying box 26 to the discharge port on the machine box 1.

[0040] A gas heating box 27 is installed at the lower end of the inner cavity of the drying chamber 26. An arc-shaped guide plate 28 is installed at the top of the inner cavity of the drying chamber 26 above the gas heating box 27. An exhaust pipe 29 is installed at the upper end of the outer side of the drying chamber 26, and an air supply pipe 30 is installed at the lower end of the exhaust pipe 29. The exhaust pipe 29 is connected to the drying chamber 26 at the position corresponding to the arc-shaped guide plate 28, and the air supply pipe 30 is connected to the gas heating box 27. The gas heating box 27 has multiple air outlets on the side facing the carbon-coated aluminum foil, and a heating wire 28 is installed inside the gas heating box 27.

[0041] A dryer filter 31 and a circulating fan 32 are installed on the outer side of the casing 1. The dryer filter 31 and the circulating fan 32 are connected by a circulating air duct 33, and the upper and lower ends of the circulating air duct 33 are connected to the exhaust duct 29 and the supply air duct 30, respectively. At the same time, the dryer filter 31 has a drying layer and a filter layer inside. When the return hot air passes through the dryer filter 31, it can first dry and then filter the dust particles in the airflow, ensuring the purity of the return airflow.

[0042] In this embodiment 3, through the above design, the aluminum foil can immediately enter the drying chamber 26 after the carbon coating is applied to the blank area. At this time, the airflow delivered by the air supply pipe 30 can be reheated by the heating wire 28 in the gas heating box 27, and then blown evenly onto the carbon coating layer on the aluminum foil surface through the air outlet on the gas heating box 27, so as to achieve rapid drying of the carbon coating layer. At the same time, the dried hot airflow can be drawn into the drying filter 31 by the exhaust pipe 29, and after drying and filtration, it is returned to the gas heating box 27 by the circulating fan 32. This realizes the secondary utilization of heat energy in the drying hot air, reduces the power consumption in the aluminum foil carbon coating drying process, and has positive significance for energy saving and emission reduction.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An aluminum foil carbon coating device for leaving blank areas, comprising a housing, a material trough, a coating roller, and a back roller, wherein the material trough is disposed at the bottom of the housing, the lower side of the coating roller is rotatably disposed in the material trough, and a drive device is connected to the roller shaft at one end of the coating roller, and the back roller is disposed directly above the coating roller, characterized in that, A scraper is provided in the material trough, and the end of the scraper near the coating roller is provided with a beveled blade. The end of the scraper away from the coating roller is rotatably connected to the material trough. Both ends of the coating roller are concentrically fixed with discs. The end face of the discs is provided with irregular ring guide grooves. The irregular ring guide grooves include long arc segments and short arc segments with concentricity and unequal diameters. A connecting section is provided between the two ends of the long arc segments and the short arc segments. Rotating bars are rotatably connected to the inner walls of the machine box on the front and rear sides of the scraper by torsion springs. One end of the rotating bar is provided with a guide member that interacts with the corresponding irregular ring guide groove. The other ends of the two rotating bars are connected to a swing rod. The swing rod has a long slot for passing through the scraper.

2. The aluminum foil carbon coating device according to claim 1, characterized in that, The radius of the long arc segment is smaller than that of the short arc segment. When the guide member interacts with the long arc segment, the inclined blade at the end of the scraper does not contact the roller surface of the coating roller. When the guide member interacts with the short arc segment, the inclined blade at the end of the scraper contacts the roller surface of the coating roller.

3. The aluminum foil carbon coating device according to claim 1 or 2, characterized in that, An upper limiting component and a lower limiting component are fixedly installed above and below the scraper to limit its rotation.

4. The aluminum foil carbon coating device according to claim 1, characterized in that, Blanking blades are provided on both the front and rear sides above the scraper, and a second telescopic drive is provided in the machine housing to push the blanking blades to both ends of the coating roller body.

5. The aluminum foil carbon coating device according to claim 1, characterized in that, The chassis is provided with a first telescopic drive that pushes the back roller toward or away from the top of the coating roller.

6. The aluminum foil carbon coating device according to claim 1, characterized in that, A drying chamber is provided in the machine housing located above the back roller, and the upper and lower ends of the drying chamber are provided with openings for aluminum foil to pass through. The drying chamber is provided with a hot air circulation mechanism that blows hot air onto the carbon coating layer on the surface of the aluminum foil.

7. The aluminum foil blanking and carbon coating device according to claim 6, characterized in that, The hot air circulation mechanism includes a gas heating box located at the lower end of the drying chamber and an arc-shaped guide plate located at the upper end of the drying chamber. The outer side of the drying chamber is provided with an exhaust pipe corresponding to the arc-shaped guide plate and an air supply pipe corresponding to the gas heating box. A circulation duct is connected between the outer ends of the exhaust pipe and the air supply pipe. A drying filter and a circulation fan are provided on the circulation duct.

8. The aluminum foil carbon coating device according to claim 7, characterized in that, The gas heating box is equipped with a heating wire inside, and an air outlet is provided on the side of the gas heating box facing the aluminum foil.

9. The aluminum foil carbon coating device according to claim 1, characterized in that, The lower end of the material trough is connected to a conveying pipe, the end of the conveying pipe is connected to a carbon slurry tank, and a conveying pump is installed on the conveying pipe.

10. The aluminum foil carbon coating device according to claim 1, characterized in that, The machine housing is equipped with a feed guide roller near the feed inlet and a discharge guide roller near the discharge outlet. Guide rollers are also provided in the machine housing located on both sides above the back roller.

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