A squeeze roll structure for electrolytic copper foil

Abstract

The application provides an extrusion roller structure for electrolytic copper foil, which comprises a roller core, an outer rubber layer and an inner rubber layer. The inner rubber layer is arranged on the surface of the roller core, and the outer rubber layer is arranged on the outer surface of the inner rubber layer. The hardness of the outer rubber layer is greater than that of the inner rubber layer, and the thickness of the outer rubber layer is less than that of the inner rubber layer. The outer rubber layer and the inner rubber layer can effectively improve the local deformation state of the extrusion roller, increase the effective contact area of the extrusion roller surface and the cathode roller in the whole width direction, and ensure the good extrusion effect of the extrusion roller. Specifically, the outer rubber layer provides rigid support, reduces excessive deformation during extrusion, ensures the stability of the overall shape, and is wear-resistant and damage-resistant, avoiding interface wear and damage to uniformity. The inner rubber layer absorbs pressure fluctuations and fills the surface micro defects of the extruded object through elastic deformation, avoids local overpressure or gaps, and makes the pressure transmission more uniform.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic copper foil technology, and specifically to a squeezing roller structure for electrolytic copper foil. Background Technology

[0002] The electrolytic copper foil process mainly includes copper foil peeling, mother liquor spraying and cleaning, passivation, water washing, edge trimming, and winding. Among these processes, after the mother liquor spraying and cleaning and water washing processes, the residual liquid on the surface of the copper foil needs to be squeezed dry. This is to prevent contamination of the copper foil, and also because residual liquid on the surface of the copper foil can easily cause wrinkles, affecting the final winding. The squeezing roller is an important component used in the mother liquor spraying and cleaning and water washing processes, and a squeezing roller with excellent squeezing performance is crucial for the production of high-quality copper foil.

[0003] When the squeezing roller is in operation, the rubber coating on the roller has special requirements. It must possess a certain degree of elasticity to improve the squeezing effect, while also having a certain degree of hardness to extend the service life of the squeezing roller. Existing squeezing rollers have a single-layer rubber coating structure. When the squeezed roller has a roundness error, due to the deformation limit of the single-layer rubber coating, the squeezing roller may not completely squeeze out the liquid, leading to the scrapping of copper foil and resulting in economic losses.

[0004] Patent No. 201810079900.8 discloses a squeezing roller and a foil-making machine using it. In this patent, the squeezing roller has a single rubber coating. When force is applied to both ends, the middle part of the squeezing roller is prone to bending and deformation, resulting in gaps between the squeezing roller and the cathode roller surface, which affects the squeezing effect. Therefore, this application anticipates a structure that can reduce the deformation of the squeezing roller during operation. Utility Model Content

[0005] In order to overcome the technical problem that the surface of the squeezing roller is easily deformed in the prior art, which affects the squeezing effect, this utility model provides a squeezing roller structure for electrolytic copper foil.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A squeezing roller structure for electrolytic copper foil includes a roller core, an outer rubber layer, and an inner rubber layer. The inner rubber layer is disposed on the surface of the roller core, and the outer rubber layer is disposed on the outer surface of the inner rubber layer. The hardness of the outer rubber layer is greater than that of the inner rubber layer, and the thickness of the outer rubber layer is less than that of the inner rubber layer.

[0008] Furthermore, both the outer and inner rubber layers are made of EPDM rubber.

[0009] Furthermore, the hardness ratio of the outer coating layer to the inner coating layer is 2:1, and the thickness ratio of the outer coating layer to the inner coating layer is 2:3.

[0010] Furthermore, the hardness of the outer adhesive layer is Shore D80, and the hardness of the inner adhesive layer is Shore D40.

[0011] Furthermore, the outer adhesive layer has a thickness of 12mm and an outer diameter of 80mm, while the inner adhesive layer has a thickness of 12mm and an outer diameter of 96mm.

[0012] Furthermore, the outer and inner rubber coatings are located in the squeezing area of ​​the roller core, and connecting sections are reserved at both ends of the roller core.

[0013] The beneficial effects of this utility model are:

[0014] This application provides a squeezing roller structure for electrolytic copper foil, including a roller core, an outer rubber layer, and an inner rubber layer. The inner rubber layer is disposed on the surface of the roller core, and the outer rubber layer is disposed on the outer surface of the inner rubber layer. The hardness of the outer rubber layer is greater than that of the inner rubber layer, and the thickness of the outer rubber layer is less than that of the inner rubber layer. This application, through the outer and inner rubber layers, can effectively improve the local deformation state of the squeezing roller, increase the effective contact area between the roller surface and the cathode roller in the entire width direction, and ensure good squeezing effect. Specifically, the outer rubber layer provides rigid support, reduces excessive deformation during extrusion, ensures overall shape stability, and is wear-resistant and damage-resistant, preventing interface wear from disrupting uniformity. The inner rubber layer absorbs pressure fluctuations through elastic deformation and fills minor surface defects of the extruded material, preventing local overpressure or gaps and allowing for more uniform pressure transmission. Furthermore, the higher hardness of the outer rubber layer provides more stable extrusion force and significantly extends the service life of the squeezing roller. Attached Figure Description

[0015] Figure 1 A schematic diagram of a squeezing roller structure for electrolytic copper foil according to an embodiment of the present disclosure is shown;

[0016] Figure 2 A front view of a squeezing roller structure for electrolytic copper foil according to an embodiment of the present disclosure is shown;

[0017] Figure 3 It shows Figure 2 AA section view;

[0018] Figure 4 It shows Figure 2 BB section view;

[0019] Figure 5 A schematic diagram is shown of the effect of the squeezing roller when the cathode roller surface protrudes along the middle of the generatrix;

[0020] Figure 6 This diagram illustrates the effect of the squeezing roller when the cathode roller surface is inclined along the generatrix.

[0021] Figure 7 This diagram illustrates the effect of the squeezing roller when the cathode roller surface is recessed along the middle of the generatrix.

[0022] In the diagram, 1-roller core; 2-outer rubber coating layer; 3-inner rubber coating layer. Detailed Implementation

[0023] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] To address the issue of the squeezing roller failing to completely squeeze out copper foil due to dimensional errors caused by limited elastic deformation and dimensional inaccuracies between the squeezing roller and the cathode roller during contact, gaps can be created at the contact surface between the cathode roller and the squeezing roller due to localized deformation or uneven stress. For example... Figures 5-7 As shown, Figure 5 A schematic diagram is shown of the effect of the squeezing roller when the cathode roller surface protrudes along the middle of the generatrix; Figure 6 This diagram illustrates the effect of the squeezing roller when the cathode roller surface is inclined along the generatrix. Figure 7 This diagram illustrates the effect of the squeezing roller when the cathode roller surface is recessed along the middle of the generatrix.

[0025] This disclosure provides a squeezing roller structure for electrolytic copper foil. Figure 1 A schematic diagram of a squeezing roller structure for electrolytic copper foil according to an embodiment of the present disclosure is shown. Figure 2 A front view of a squeezing roller structure for electrolytic copper foil according to an embodiment of the present disclosure is shown; Figure 3 It shows Figure 2 AA section view; Figure 4 It shows Figure 2 BB sectional view; such as Figures 1-4 As shown, the roller core 1 includes an outer rubber coating layer 2 and an inner rubber coating layer 3. The inner rubber coating layer 3 is disposed on the surface of the roller core 1, and the outer rubber coating layer 2 is disposed on the outer surface of the inner rubber coating layer 3. The hardness of the outer rubber coating layer 2 is greater than that of the inner rubber coating layer 3, and the thickness of the outer rubber coating layer 2 is less than that of the inner rubber coating layer 3. It should be noted that the inner rubber coating layer 3 is obtained by a rubber coating process on the surface of the roller core 1, and the outer rubber coating layer 2 is obtained by a rubber coating process on the surface of the inner rubber coating layer 3.

[0026] In this embodiment, both the outer adhesive layer 2 and the inner adhesive layer 3 are made of ethylene propylene diene monomer (EPDM) rubber. EPDM rubber is resistant to corrosion from electrolytes such as sulfuric acid and copper sulfate solutions, and its hardness can be customized, balancing rigidity and adhesion. It can ensure high extrusion pressure without scratching the thin foil.

[0027] In this embodiment, the hardness ratio of the outer rubber layer 2 to the inner rubber layer 3 is 2:1, and the thickness ratio of the outer rubber layer 2 to the inner rubber layer 3 is 2:3. Specifically, the hardness of the outer rubber layer 2 is Shore D80, the thickness is 12mm, and the outer diameter is 80mm. While possessing strong corrosion resistance, the outer rubber layer 2 also exhibits high hardness and wear resistance, thereby significantly extending the service life of the squeezing roller during operation.

[0028] The inner rubber layer 3 has a hardness of Shore D40, a thickness of 12mm, and an outer diameter of 96mm. The inner rubber layer 3 has a large elastic deformation limit, which can compensate for the situation where the liquid cannot be squeezed out due to the dimensional error of the cathode roller surface through large deformation.

[0029] It should be noted that, in order to improve the bonding force between the outer coating layer 2 and the inner coating layer 3, both the outer coating layer 2 and the inner coating layer 3 adopt a peroxide vulcanization system. This improves the uniform distribution of the accelerator in the sulfur vulcanization system between the outer coating layer 2 and the inner coating layer 3, thereby reducing the difference in interfacial crosslinking degree. Simultaneously, the surface of the inner coating layer 3 is micro-roughened, for example, by sandblasting and / or chemical etching, to increase surface roughness. Furthermore, in some embodiments, the surface of the inner coating layer 3 can also be provided with structures that enhance macroscopic interlocking, such as dovetail grooves or other maneuvering structures. When the rubber material of the outer coating layer 2 encapsulates the inner coating layer 3, it fills these groove-shaped structures, thereby enhancing the mechanical interlocking force.

[0030] In this embodiment, the outer rubber layer 2 and the inner rubber layer 3 are located in the squeezing area of ​​the roller core 1, and connecting sections are reserved at both ends of the roller core 1. That is, connecting sections for connecting drive components or load components are reserved at both ends of the roller core 1.

[0031] The embodiments disclosed herein can effectively improve the squeezing effect of squeezing rollers used for electrolytic copper foil.

Claims

1. A squeezing roller structure for electrolytic copper foil, characterized in that, It includes a roller core (1), an outer rubber layer (2) and an inner rubber layer (3). The inner rubber layer (3) is disposed on the surface of the roller core (1), and the outer rubber layer (2) is disposed on the outer surface of the inner rubber layer (3). The hardness of the outer rubber layer (2) is greater than that of the inner rubber layer (3), and the thickness of the outer rubber layer (2) is less than that of the inner rubber layer (3).

2. The extrusion roller structure for electrolytic copper foil according to claim 1, characterized in that, The outer rubber layer (2) and the inner rubber layer (3) are both made of EPDM rubber.

3. The extrusion roller structure for electrolytic copper foil according to claim 1, characterized in that, The hardness ratio of the outer rubber layer (2) to the inner rubber layer (3) is 2:1, and the thickness ratio of the outer rubber layer (2) to the inner rubber layer (3) is 2:

3.

4. The extrusion roller structure for electrolytic copper foil according to claim 3, characterized in that, The hardness of the outer adhesive layer (2) is Shore D80, and the hardness of the inner adhesive layer (3) is Shore D40.

5. The extrusion roller structure for electrolytic copper foil according to claim 3, characterized in that, The outer adhesive layer (2) has a thickness of 12 mm and an outer diameter of 80 mm, and the inner adhesive layer (3) has a thickness of 12 mm and an outer diameter of 96 mm.

6. The extrusion roller structure for electrolytic copper foil according to claim 1, characterized in that, The outer rubber layer (2) and the inner rubber layer (3) are located in the squeezing area of ​​the roller core (1), and the roller core (1) has a connection section reserved at both ends.

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