Multi-row coating device

Abstract

A multi-row coating device. The multi-row coating device comprises an unwinding device, a coating structure, a water washing device, an anti-oxidation device, and a winding device which are sequentially and linearly arranged in an electrode sheet conveying direction. The coating structure comprises multiple rows of coating tanks, multiple cathode rollers (1) and multiple anode rollers (2) are correspondingly arranged on each row of coating tanks in the electrode sheet conveying direction, and an effective coating width between a single cathode roller (1) and a single anode roller (2) which are correspondingly arranged is less than or equal to 800 mm.

Description

Multi-row coating device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 27, 2023, with application number 202323220740.X. The entire contents of this application are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the technical field of coating device design, for example, relates to a multi-row coating device. Background Art

[0003] The double-sided water-copper plating process is used on the surface of various types of plastic ultra-thin films (PP or PET but not limited to these two types). The double-sided water-copper plating process is performed on a single roll of magnetron film (which has been double-sided magnetron copper plating) with a width of at least 1 meter. The probability of defects such as holes on the surface of the processed water-coated film, film deformation, wavy lines, bulging, wrinkling, and warping is high, and the qualified rate of the finished product cannot be guaranteed.

[0004] Furthermore, the greatest difficulty in ultra-thin film copper plating is that the film itself is not resistant to plating. Regardless of the method used to copper-plated the film surface, it will cause varying degrees of damage to the film itself. Furthermore, the greater the energy input during the coating process, the greater the probability of damage to the film itself. However, significantly reducing the energy input during the coating process would significantly reduce the efficiency of the coating production. Summary of the Invention

[0005] The present application provides a multi-row coating device, which ensures double-row or multi-row coating operations in one line by setting up multiple components, and the width of each roll of water-coated film produced by each row is ≤800mm. Two or more rolls of film can be plated simultaneously, realizing ultra-thin film water-plated copper production, and improving coating quality and production efficiency.

[0006] An embodiment of the present application provides a multi-row coating device, which includes an unwinding device, a coating structure, a water washing device, an anti-oxidation device and a winding device arranged in a straight line along the transmission direction of the electrode piece; the coating structure includes multiple rows of coating troughs, and each row of the coating troughs is provided with corresponding multiple cathode rollers and multiple anode rollers along the transmission direction of the electrode piece, and the effective coating width between the corresponding single cathode roller and the single anode roller is ≤800mm.

[0007] In one embodiment, the multi-row coating device further includes a baking device disposed between the anti-oxidation device and the winding device.

[0008] In one embodiment, the cathode roller and the anode roller are both cylindrical tubular structures.

[0009] In one embodiment, the diameter of the cathode roller is the same as the diameter of the anode roller.

[0010] In one embodiment, the length of the cathode roller is the same as the length of the anode roller.

[0011] In one embodiment, a plurality of cathode liquid through holes are evenly distributed on the cathode roller, and the cathode liquid through holes are configured to spray liquid to assist the electrode in conducting electricity.

[0012] In one embodiment, a plurality of anode liquid through holes are evenly distributed on the anode roller, and the anode liquid through holes are configured to spray liquid to assist the electrode in conducting electricity.

[0013] In one embodiment, the cathode roller is a copper roller.

[0014] In one embodiment, the anode roller is a titanium-iridium-plated roller.

[0015] In one embodiment, the cathode roller and the anode roller are electrically connected to a same variable polarity power supply, and the variable polarity power supply is configured to change at least one of the polarities of the cathode roller and the anode roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of a multi-row coating device provided in one embodiment of the present application;

[0017] Among them, 1- cathode roller; 2- anode roller. DETAILED DESCRIPTION

[0018] It should be understood that in the description of this application, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0019] It should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. A person of ordinary skill in the art will be able to understand the meaning of the above terms in this application based on the specific circumstances.

[0020] The technical solution of this application is explained below with reference to the accompanying drawings and through specific implementation methods.

[0021] In a specific embodiment, the present application provides a multi-row coating device, which includes a unwinding device, a coating structure, a water washing device, an anti-oxidation device and a winding device arranged in a straight line along the transmission direction of the electrode; the coating structure includes multiple rows of coating tanks, and each row of coating tanks is provided with a corresponding plurality of cathode rollers 1 and a plurality of anode rollers 2 along the transmission direction of the electrode, and the effective coating width between the corresponding single cathode roller 1 and the single anode roller 2 is ≤800mm, for example, it can be 800mm, 750mm, 700mm, 650mm, 600mm, 550mm, 500mm, etc., but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0022] The present application changes the one-time water plating of one roll of film to the simultaneous water plating of two or more rolls of film, which greatly reduces the probability of damage to the film itself, and there is almost no loss in the production efficiency of the film plating, while simultaneously ensuring the product quality and production efficiency of the ultra-thin film water plating copper plating process. The production process requires the copper plating at the magnetron end to produce narrow films of the same width or to produce magnetron films with a width that is relatively more than twice as wide and then cut at the slitting end.

[0023] This application does not impose any special restrictions on the structure, operation mode, etc. of the unwinding device, water washing device, antioxidant device and winding device, and only requires to ensure that multiple components can operate in a straight line. That is, the entire coating line in this application is a horizontal film-pulling structure, and the horizontal film is fully immersed in the plating solution. The route of the film in the coating tank is completely horizontal without ups and downs. Technical personnel in this field can make adaptive adjustments according to actual conditions.

[0024] The effective coating width between the corresponding single cathode roller and the single anode roller in this application is ≤800mm, which means that the inner space of each row of coating slots can be plated with a width of ≤800mm, that is, the effective coating width of the cathode roller and the anode roller is ≤800mm, and the effective film width of each line body that can be plated is ≤800mm.

[0025] The width of each roll of water-coated finished product produced by each row designed in this application is ≤800mm, which can greatly reduce the probability of wrinkling of the copper film when it is rolled up, and greatly reduce the probability of film surface deformation such as bubbles and wheel marks, thereby improving the qualified rate of copper film output.

[0026] The present application does not limit the number of rows of coating tanks, and those skilled in the art can make adaptive adjustments based on actual conditions.

[0027] The number of cathode rollers, anode rollers, cathode liquid through holes, and anode liquid through holes is not limited in this application, and those skilled in the art can make adaptive adjustments based on actual conditions.

[0028] It should be noted that the coating tank in the present application can be a copper cylinder, and those skilled in the art can adaptively adjust its shape, material, size, etc. according to actual conditions.

[0029] The multi-row coating device further comprises a baking device arranged between the anti-oxidation device and the winding device.

[0030] This application does not impose any special restrictions on the structure, operation mode, etc. of the baking device, and it is sufficient to ensure that it can achieve the purpose of linear operation by cooperating with multiple components. Those skilled in the art can make adaptive adjustments based on actual conditions.

[0031] The cathode roller 1 and the anode roller 2 are both cylindrical tubular structures.

[0032] The diameter of the cathode roller 1 and the diameter of the anode roller 2 are the same.

[0033] The length of the cathode roller 1 and the length of the anode roller 2 are the same.

[0034] The cathode and anode rollers in this application are designed, and their shapes and sizes are limited, to minimize the length of the entire line and reduce risks during film drawing. Furthermore, the film itself is narrow in width, and the coating process is visible. If line inspectors discover an abnormality such as foreign matter adhering to the film surface during coating, the solution to the sudden abnormality becomes very simple (just spray pure water from a kettle to wash it away).

[0035] The cathode roller 1 is evenly distributed with multiple cathode liquid holes, which are configured to inject liquid to assist the electrode plate in conducting electricity. This application does not limit the number and shape of the multiple cathode liquid holes, and those skilled in the art can adapt them according to actual circumstances. The shape of the cathode liquid holes can be circular, square, etc.

[0036] The anode roller 2 is evenly distributed with multiple anolyte holes, which are configured to inject liquid to assist the electrode plate in conducting electricity. This application does not limit the number and shape of the multiple anolyte holes, and those skilled in the art can adapt them according to actual circumstances. The shape of the anolyte holes can be circular, square, or other shapes.

[0037] The cathode roller 1 is a copper roller.

[0038] In the present application, the cathode roller is a copper roller because the selection of this material allows the cathode roller to be recycled when its size changes beyond the acceptable range of the equipment.

[0039] The anode roller 2 is a titanium-iridium-plated roller.

[0040] The anode roller in this application is a titanium-iridium-plated roller because the selection of this material can form a closed loop of anode and cathode, and extend the service life of the insoluble anode, avoiding the phenomenon of copper slag and other puncture films on the soluble anode.

[0041] The cathode roller 1 and the anode roller 2 are electrically connected to a same variable polarity power supply, and the variable polarity power supply is configured to change the polarity of the cathode roller 1 and / or the anode roller 2 .

[0042] The variable polarity power supply in this application can maintain the cathode and anode polarities of cathode roller 1 and anode roller 2 unchanged for every 5 to 10 minutes, outputting power. Then, for a period of 10 to 30 seconds or 30 to 60 seconds, the polarity of cathode roller 1 and anode roller 2 is briefly swapped (i.e., cathode roller 1 becomes anode roller 2, and anode roller 2 becomes cathode roller 1), outputting power. This ensures normal energy output during the electroplating process, prevents copper plating on cathode roller 1, ensures the film is plated effectively in the plating tank, and prevents damage to the film surface.

[0043] Example 1

[0044] This embodiment provides a multi-row coating device, wherein:

[0045] The multi-row coating device includes an unwinding device, a coating structure, a water washing device, an anti-oxidation device, a baking device and a winding device which are arranged in a straight line along the transmission direction of the electrode piece; the coating structure includes multiple rows of coating tanks, and each row of coating tanks is provided with corresponding multiple cathode rollers 1 and multiple anode rollers 2 along the transmission direction of the electrode piece, and the effective coating width between the corresponding single cathode roller 1 and the single anode roller 2 is 800mm.

[0046] The cathode roller 1 and the anode roller 2 are both cylindrical tubular structures. The diameter of the cathode roller 1 is the same as that of the anode roller 2 , and the length of the cathode roller 1 is the same as that of the anode roller 2 .

[0047] The cathode roller 1 is evenly distributed with multiple cathode liquid through holes, which are configured to spray liquid to assist the electrode to conduct electricity. The anode roller 2 is evenly distributed with multiple anode liquid through holes, which are configured to spray liquid to assist the electrode to conduct electricity.

[0048] The cathode roller 1 is a copper roller, the anode roller 2 is a titanium-iridium-plated roller, and the cathode roller 1 and the anode roller 2 are electrically connected to the same variable polarity power supply, which is configured to change the polarity of the cathode roller 1 and / or the anode roller 2.

[0049] Comparative Example 1

[0050] This comparative example provides a multi-row coating device, which is different from Example 1 in that the effective coating width between the corresponding single cathode roller 1 and the single anode roller 2 is 900 mm, and the other parameters and conditions are the same as those in Example 1.

[0051] Comparative Example 2

[0052] This comparative example provides a multi-row coating device, which is different from Example 1 in that the effective coating width between the corresponding single cathode roller 1 and the single anode roller 2 is 1000 mm, and the other parameters and conditions are the same as those in Example 1.

[0053] By observing the appearance of the film surface of the multi-row coating devices in the embodiments and comparative examples, the following observation results were obtained: the narrow film slot in embodiment 1 did not wrinkle when rolled up, and the unfolded film had no wheel marks and no bubbles. The 900mm width rolling in comparative example 1 occasionally wrinkled, and the film surface wrinkled frequently when rolled up with a width of more than 1000mm in comparative example 2.

[0054] It can be seen that the coating results obtained in Example 1 are better than the coating results in Comparative Example 1 and Comparative Example 2. This is because the present application ensures the coating operation of double rows in one line or multiple rows in one line by limiting the effective coating width between the corresponding single cathode roller 1 and the single anode roller 2 to ≤800mm, and the width of each roll of water-coated finished product produced by each row is ≤800mm. Two or more rolls of film can be plated simultaneously, realizing the production of ultra-thin film water-plated copper, and improving the coating quality and production efficiency.

Claims

1. A multi-row coating device, comprising an unwinding device, a coating structure, a water washing device, an anti-oxidation device and a winding device which are arranged in a straight line in the direction of pole piece transmission; The coating structure includes multiple rows of coating troughs, each row of the coating troughs is provided with corresponding multiple cathode rollers and multiple anode rollers along the pole piece transmission direction, and the effective coating width between the corresponding single cathode roller and the single anode roller is ≤800mm.

2. The multi-row coating device according to claim 1, wherein: It also includes a baking device arranged between the anti-oxidation device and the winding device.

3. The multi-row coating device according to claim 1, wherein: The cathode roller and the anode roller are both cylindrical tubular structures.

4. The multi-row coating device according to claim 3, wherein: The diameter of the cathode roller is the same as the diameter of the anode roller.

5. The multi-row coating device according to claim 3 or 4, wherein: The length of the cathode roller is the same as the length of the anode roller.

6. The multi-row coating device according to claim 1, wherein: The cathode roller is evenly distributed with a plurality of cathode liquid through holes, and the cathode liquid through holes are configured to spray liquid to assist the electrode plate in conducting electricity.

7. The multi-row coating device according to claim 1, wherein: The anode roller is evenly distributed with a plurality of anode liquid through holes, and the anode liquid through holes are configured to spray liquid to assist the pole piece in conducting electricity.

8. The multi-row coating device according to claim 1, wherein: The cathode roller is a copper roller.

9. The multi-row coating device according to claim 1, wherein: The anode roller is a titanium-iridium-plated roller.

10. The multi-row coating device according to claim 1, wherein: The cathode roller and the anode roller are electrically connected to a same variable polarity power supply, and the variable polarity power supply is configured to change at least one of the polarities of the cathode roller and the anode roller.

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