Compression roller device and compound system
The multi-stage pressing and stripping design of the pressure roller combination device solves the problems of poor tightness and stripping effect of the composite materials, and achieves high-quality and efficient composite production, which is particularly suitable for the production of composite current collectors in the new energy field.
Patent Information
- Application Number
- CN202422300192.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The existing pressing device has problems of poor composite quality and easy material breakage in the production process of composite materials with high composite tightness requirements, thin materials and need to be peeled off. Especially in the production of composite current collectors in the new energy field, conventional pressing structures are difficult to ensure composite tightness and peeling effect.
A pressure roller combination device is used, including multiple pressure roller assemblies, which are arranged in descending height. Combined with a telescopic mechanism and pressure rollers of different diameters, and a supporting roller body, multi-stage pressing and peeling are achieved. Through the cooperation of the initial pressing roller, the transition pressing roller and the final pressing roller, the composite process is optimized to ensure the targeted pressing and peeling of the materials at each stage.
It significantly improves the compactness of composite materials, reduces bubbles and air gaps, ensures smooth peeling of materials, improves composite quality and production efficiency, is suitable for ultra-thin materials, and meets the needs of continuous and efficient production.
Smart Images
Figure CN223340014U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lamination devices, and more specifically, to a pressing roller device and a composite system. Background Art
[0002] In the prior art, when laminating a larger roller surface as a support surface, the same pressing rollers are usually evenly arranged along the roller surface to achieve the corresponding matching and laminating process. This type of composite structure is suitable for laminating between most different materials. However, it has shortcomings in the production process of composite materials that require high lamination tightness, thin materials, and need to be peeled. For example, when directly utilizing the viscosity of the materials for lamination in the new energy field, a corresponding pressing and laminating process is required, especially when laminating with the cathode roller as the support surface, the substrate and the foil on the cathode roller are laminated. When generating a composite current collector based on this method, one of the key factors affecting its quality is the degree of lamination tightness, that is, whether there are obvious bubbles at the lamination interface. Moreover, since both the substrate layer and the foil layer of the composite current collector are only a few microns thick, any defects in the lamination quality will be more obvious. After lamination, the material layer needs to be peeled off from the load roller body. Due to the extremely small thickness, the conventional pressing structure is used for lamination and then peeling, which is prone to material breakage and other effects, which is not conducive to continuous and efficient production.
[0003] Therefore, the prior art requires a correspondingly improved pressing device to improve the composite tightness and improve the composite production effect and efficiency. Utility Model Content
[0004] The utility model aims to overcome at least one of the above-mentioned deficiencies of the prior art and provide a pressing roller device and a composite system, which are convenient for increasing the composite tightness of materials and improving the composite and peeling effects of ultra-thin materials.
[0005] The technical solution adopted by the present invention is a pressure roller device, including a pressure roller combination, wherein the pressure roller combination is formed by two or more pressure roller assemblies, and the pressure roller assembly includes a pressure roller and a telescopic mechanism connected to the pressure roller; and in the direction from the front side to the rear side, the pressure roller assemblies in the pressure roller combination are arranged in descending height; the pressure roller near the upstream end of the pressure roller combination is the initial pressure roller, and the pressure roller near the downstream end of the pressure roller combination is the finishing pressure roller, and the diameter D1 of the initial pressure roller is less than the diameter D2 of the finishing pressure roller.
[0006] The pressure roller assemblies are arranged in descending heights to accommodate the cylindrical side surface of a rolled or wound material. When a first material layer passes between the pressure roller assembly and a wound second material layer, the pressure roller assembly in the pressure roller device presses the first material layer onto the wound second material layer and presses downward toward the second material layer, thereby achieving adhesion between the first and second material layers. Furthermore, the first and / or second material layers are adhesive. When the pressure roller assembly comprises at least two pressure roller assemblies, pressure is achieved in at least two areas on the corresponding cylindrical side surface. This not only facilitates extending the pressure time and improving the pressure quality while ensuring continuous material flow, but also facilitates the configuration of pressure zones based on material characteristics. Furthermore, the pressure roller assemblies in the pressure roller assembly are arranged in descending heights, and at least when the telescopic mechanism is in the retracted state, the telescopic mechanism also exhibits a corresponding descending height arrangement. This facilitates the use of the same telescopic mechanism to accommodate pressure at multiple locations along the curved cylindrical side surface, while also reducing the difficulty of controlling different pressure roller assemblies within the corresponding device control program. In this application, the initial lamination roller is set to a smaller diameter. On the one hand, it is beneficial for the initial lamination roller to concentrate its action on the material composite, and on the other hand, it is convenient to provide a wider range of material entry angles, so that the corresponding composite material entry angle can be adjusted according to the material characteristics. Setting the final lamination roller to a larger diameter is beneficial to limit the peeling angle, so that the composite material is peeled at a smaller peeling angle, and the composite material is slowly peeled at the final lamination roller. Based on this diameter design, combined with the aforementioned pressure roller combination, the entire process from the composite material entering the lamination area, being pressed and peeled can achieve targeted optimization of each stage, thereby significantly improving the quality of material composite and the efficiency of post-compounding extraction, and is applicable to a wide range of materials, including ultra-thin materials.
[0007] Furthermore, the pressing roller device is a pressing roller device that cooperates with a resisting roller body to form a composite material. The pressing roller combination at least transmits the first material layer; the surface of the resisting roller body carries the second material layer; the pressing roller combination and the surface of the resisting roller body are configured to jointly press the first material layer and the second material layer to obtain a composite material. Furthermore, the first material layer is a substrate layer with a sticky surface; or, the first material layer is a substrate layer with an adhesive layer coated on the surface. For a thinner second material layer, the sticky first material layer can be peeled off from the corresponding roller body after pressing; and the formation of the stickiness can be the stickiness of the surface of the first material layer itself, or it can be formed by coating the surface of the first material layer to form an adhesive layer, and the adhesive layer is used to composite the second material layer. Furthermore, the resisting roller body can be a cathode roller; and / or, the second material layer is a foil such as copper foil.
[0008] Furthermore, the telescopic mechanism is configured to allow the corresponding pressure roller to extend and retract in a direction perpendicular to the surface of the abutting roller. The pressure roller under the telescopic mechanism can act perpendicularly on the corresponding abutting surface. In addition to avoiding slippage and other conditions that may be caused by deviations in the direction of action, it is also conducive to accurately detecting the corresponding pressure or tension, thereby facilitating accurate control and maintenance of the pressure required for stable lamination and the extension length of the telescopic mechanism. Furthermore, the pressure roller assembly is arranged on the upper side of the abutting roller. At this time, the part of the wound material to be composited is located on the upper side of the abutting roller. Due to gravity, the material is maintained in an extended state on the surface of the corresponding winding cylinder, which is conducive to obtaining a smooth composite layer and avoiding large gaps and wrinkles at the composite interface. If it is arranged on the lower side, the released wound material may be in a state of being suspended, and some areas may collapse downward due to gravity, which is not conducive to smooth and tight composite. Furthermore, the pressure roller assembly is arranged on the oblique upper side of the abutting roller. That is, the pressure roller device only needs to be partially opposite to the supporting roller body, which can reduce the lateral size of the integrated pressure roller device, and thus reduce the load-bearing length and weight of the corresponding mounting bracket. In addition to reducing costs, it is also conducive to installation, layout and maintenance, and is easy to operate in conjunction with the shape of the supporting roller body.
[0009] Furthermore, one or more transitional lamination rollers are provided between the initial lamination roller and the final lamination roller; the diameter D1 of the initial lamination roller is less than or equal to the diameter D3 of the transitional lamination roller, and the diameter D3 of the transitional lamination roller is less than or equal to the diameter D2 of the final lamination roller; or, the diameter D1 of the initial lamination roller is greater than the diameter D3 of the transitional lamination roller. Furthermore, when multiple transitional lamination rollers are provided, at least two transitional lamination rollers have the same or different diameters; further, the diameters of the transitional lamination rollers are different, and the diameters gradually increase from upstream to downstream. Furthermore, the lamination rollers in the lamination roller combination are arranged in an arc shape. When the lamination roller combination includes three or more lamination roller assemblies, the lamination roller assemblies in the lamination roller combination are arranged in an arc shape to facilitate matching with the corresponding abutting roller body with a larger roller surface; by matching the transitional lamination roller with the initial lamination roller and the final lamination roller, their diameters can be utilized to further achieve multi-stage lamination and corresponding adjustment during the lamination process, further improving the lamination quality.
[0010] Furthermore, the range of D1 is 120~180mm; the range of D2 is 180~200mm; and the range of D3 is 120~200mm.
[0011] Furthermore, the surface hardness H1 of the initial lamination roller is greater than the surface hardness H2 of the final lamination roller. With this hardness relationship, the initial lamination roller can concentrate the force on the material passing through it with a smaller active area, thereby improving the removal of bubbles and other effects in the initial stages. The reduced hardness of the final lamination roller increases the active area with the supporting roller, further improving the uniformity of lamination after the initial lamination and removal by the initial lamination roller. It also provides a buffer for the process from composite lamination to separation.
[0012] Furthermore, one or more transition lamination rollers are provided between the initial lamination roller and the final lamination roller. The lamination roller components within the lamination roller assembly are arranged in an arc shape. The surface hardness of the initial lamination roller, H1, is greater than the surface hardness of the transition lamination roller, H3, and is greater than the surface hardness of the final lamination roller, H2. Furthermore, H1 is ≥ 45 degrees; even more preferably, H1 > H3 > H2. The roller surface hardness includes the rubber hardness of the roller body, measured in Shore A hardness. Different roller surface hardnesses correspond to different effective areas, and setting H1, H3, and H2 as described above can further significantly improve the lamination effect. Furthermore, H1 ranges from 45 to 55 degrees; H3 ranges from 35 to 45 degrees; and H2 ranges from 25 to 35 degrees.
[0013] Another object of the present application is to provide a composite system, comprising the aforementioned pressing roller device and a supporting roller body cooperating with the pressing roller device.
[0014] Furthermore, the telescopic mechanism's telescopic direction is opposite to the center of the abutting roller body. That is, the telescopic mechanism of the pressure roller assembly in the pressure roller assembly is configured to enable the corresponding pressure roller to telescope in a direction perpendicular to the surface of the abutting roller body.
[0015] Furthermore, the present invention provides an application of the aforementioned composite system in producing a composite current collector.
[0016] Furthermore, it also includes a deflection roller, which is arranged downstream of the pressure roller device; and the deflection roller is used to deflect the material passing through the pressure roller device and the abutting roller body.
[0017] Furthermore, the system further includes an inlet roller, positioned upstream of the pressure roller assembly; the inlet roller is used to introduce material into the pressure roller assembly, such as introducing the first material layer into the pressure roller assembly; and the inlet roller is connected to a height adjustment mechanism. Adjusting the height of the inlet roller by means of the height adjustment mechanism adjusts the angle of entry of the material into the pressure roller assembly, thereby enabling adjustments based on actual production needs to accommodate different usage scenarios. Furthermore, the inlet roller is positioned adjacent to the pressure roller assembly, and the end of the guide roller is connected to the height adjustment mechanism. Furthermore, the height adjustment mechanism is a screw-type adjustment mechanism that adjusts the vertical position of the inlet roller.
[0018] Furthermore, it also includes a mounting bracket, which includes a support beam and side panels on both sides of the support beam, and the pressure roller assembly is installed between the side panels; and the lower side of the side panel is an inclined surface, and the height of the lower edge of the front side of the side panel is higher than the height of the lower edge of the rear side of the side panel. The support beam and the side panel provide sufficient installation space for the pressure roller assembly; and the shape of the side panel is conducive to matching the oblique upper side of the supporting roller body, so that the pressure roller assembly can also form a decreasing height arrangement in the retracted state. Furthermore, the side panel has a ladder-like structure. Furthermore, when the telescopic mechanism is in the retracted state, the lower edge of the pressure roller is lower than the lower edge of the corresponding position of the side panel. At this time, even if the length of the supporting roller body is greater than the length of the mounting bracket, since the lower edge of the pressure roller is lower than the lower edge of the side panel, it can still match smoothly; there will be no situation where the mounting bracket affects the matching.
[0019] Furthermore, it includes multiple pressure roller combinations; and the pressure roller spacing between the pressure roller combinations is different; and / or, the maximum extension length of the telescopic mechanism between the pressure roller combinations is different; and / or, the height difference between adjacent pressure rollers between the pressure roller combinations is different; and / or, the surface material of the pressure rollers between the pressure roller combinations is different; and / or, the surface roughness of the pressure rollers between the pressure roller combinations is different.
[0020] Compared with the existing technology, the beneficial effects of the present application are: it can effectively reduce or avoid bubbles, air gaps and other conditions at the composite material interface, facilitate improving the degree of composite tightness, and facilitate the smooth peeling of the material along the transmission direction, which is conducive to continuous and efficient production, and improves the composite production effect and efficiency. According to the corresponding pressure roller diameter setting at different stages, combined with the aforementioned pressure roller combination, the entire process from the composite material entering the pressing area to being pressed and peeled off can achieve targeted optimization of each stage, thereby significantly improving the material composite quality and the efficiency of post-composite extraction, and is applicable to a wide range of materials, including ultra-thin materials. Compared with the existing technology, the entire composite process has been significantly improved, and the material composite effect has been significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the pressure roller combination structure formed by two pressure rollers in this application.
[0022] Figure 2 This is a schematic diagram of the composite system structure formed by two pressing rollers cooperating with a supporting roller body in this application.
[0023] Figure 3 This is a schematic diagram of the coordination structure of the initial pressing roller and the final pressing roller in this application.
[0024] Figure 4 This is a schematic diagram of the compounding process of the compounding system of this application.
[0025] Figure 5 This is a schematic structural diagram (1) of the composite system of the present application including a preliminary lamination roller, a transition lamination roller, and a final lamination roller.
[0026] Figure 6 This is a schematic diagram (2) of the structure of the composite system of the present application including the initial pressing roller, the transition pressing roller and the final pressing roller.
[0027] Figure 7 This is a three-dimensional structural diagram of the pressure roller device of this application.
[0028] Description of the drawings: Composite system 3000, pressing roller device 3100, introduction roller 3101, height adjustment mechanism 3102, guide roller 3103, support beam 3111, side plate 3112, pressing roller combination 3120, pressing roller 31211, telescopic mechanism 31212, initial pressing roller 3121A, final pressing roller 3121B, transition pressing roller 3121C, supporting roller body 4100, first material layer 5100, second material layer 5200, composite material 5300. DETAILED DESCRIPTION
[0029] The drawings in this utility model are for illustrative purposes only and are not to be construed as limiting the scope of this utility model. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the products. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.
[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. If specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially. Example 1
[0031] This embodiment discloses a pressure roller device 3100, including a pressure roller assembly 3120, wherein the pressure roller assembly 3120 is formed by two or more pressure roller assemblies, such as Figure 1 As shown; the pressure roller assembly includes a pressure roller 31211 and a telescopic mechanism 31212 connected to the pressure roller 31211; and in the direction from the front side to the rear side, the pressure roller assemblies in the pressure roller combination 3120 are arranged in descending height; the pressure roller 31211 near the upstream end of the pressure roller combination 3120 is the preliminary pressure roller 3121A, and the pressure roller 31211 near the downstream end of the pressure roller combination 3120 is the finishing pressure roller 3121B, and the diameter D1 of the preliminary pressure roller 3121A is less than the diameter D2 of the finishing pressure roller 3121B, as shown Figure 2 、 3 shown.
[0032] The pressure roller assemblies are arranged in descending heights and can be suitable for the cylindrical side surface of a roll or wound material, such as a supporting roller body 4100 suitable for a cathode roller. The telescopic mechanism 31212 is configured to enable the corresponding pressure roller 31211 to telescope in a direction perpendicular to the surface of the supporting roller body 4100, and the pressure roller 31211 under the telescopic mechanism 31212 can act vertically on the corresponding supporting surface. The pressure roller device 3100 is a pressure roller device 3100 that cooperates with the supporting roller body 4100 to form a composite, and the pressure roller combination 3120 is arranged on the upper oblique side of the supporting roller body 4100; the pressure roller combination 3120 is at least used to transmit the first material layer 5100; the surface of the supporting roller body 4100 carries the second material layer 5200; the pressure roller combination 3120 and the surface of the supporting roller body 4100 are configured to jointly press the first material layer 5100 and the second material layer 5200 to obtain a composite material 5300; such as Figure 4 The initial laminating roller 3121A is set to a smaller diameter to focus on the material lamination, while the final laminating roller 3121B is set to a larger diameter, so that the composite material 5300 is peeled at a smaller peeling angle, so that the composite material 5300 is peeled slowly at the final laminating roller 3121B.
[0033] When the first material layer 5100 passes between the pressing roller assembly 3120 and the wound material, the pressing roller assembly 3120 in the pressing roller device 3100 can press the first material layer 5100 onto the wound second material layer 5200 and press down on one side of the second material layer 5200 to achieve adhesion between the first material layer 5100 and the second material layer 5200. The first material layer 5100 and / or the second material layer 5200 have adhesive properties. In this embodiment, the first material layer 5100 can be a substrate layer with an adhesive surface, or a substrate layer with an adhesive layer on its surface. For thinner second material layer 5200, the adhesive first material layer 5100 can be peeled off from the corresponding abutting roller 4100 after lamination. The adhesiveness can be achieved by either the surface of the first material layer 5100 itself or by applying an adhesive layer on the surface of the first material layer 5100 and then laminating the second material layer 5200. The abutting roller 4100 can be a cathode roller, and the second material layer 5200 can be a foil such as copper foil.
[0034] In this embodiment, one or more transition lamination rollers 3121C are provided between the preliminary lamination roller 3121A and the final lamination roller 3121B. Figure 5 、 6As shown; the initial pressing roller 3121A diameter D1 ≤ transition pressing roller 3121C diameter D3, and the transition pressing roller 3121C diameter D3 ≤ finishing pressing roller 3121B diameter D2, such as D1 < D3 < D2, such as Figure 5 As shown; the range of D1 is 120~180mm; the range of D2 is 180~200mm; the range of D3 is 120~200mm. Or, the diameter D1 of the preliminary pressing roller 3121A is greater than the diameter D3 of the transition pressing roller 3121C, as shown Figure 6 As shown, D3<D1<D2, etc.
[0035] Furthermore, to achieve diverse composite position adjustment options, when multiple transition pressing rollers 3121C are provided, at least two of the transition pressing rollers 3121C can have the same or different diameters. Specifically, if the transition pressing rollers 3121C have different diameters, their diameters can be arranged to gradually increase from upstream to downstream. The pressing rollers 31211 in the pressing roller assembly 3120 are arranged in an arc shape. When the pressing roller assembly 3120 includes three or more pressing roller assemblies, the arc shape arrangement facilitates compatibility with the corresponding abutting roller body 4100, which has a larger roller surface.
[0036] In order to further improve the composite effect, the hardness of the pressing roller assembly can also be configured. In this embodiment, the surface hardness H1 of the preliminary pressing roller 3121A is greater than the surface hardness H2 of the finishing pressing roller 3121B. And when there is one or more transition pressing rollers 3121C between the preliminary pressing roller 3121A and the finishing pressing roller 3121B; the surface hardness H1 of the preliminary pressing roller 3121A is greater than the surface hardness H3 of the transition pressing roller 3121C ≥ the surface hardness H2 of the finishing pressing roller 3121B. Among them, H1 ≥ 45 degrees. Specifically, H1 ranges from 45 to 55 degrees; H3 ranges from 35 to 45 degrees; H2 ranges from 25 to 35 degrees. It can also be further set to H1>H3>H2. The surface hardness of the roller includes the rubber hardness of the roller body surface, which is Shore A hardness. Example 2
[0037] This embodiment discloses a composite system 3000, comprising the aforementioned pressure roller assembly 3100 and a supporting roller body 4100 cooperating with the pressure roller assembly 3100. The telescopic mechanism 31212 extends and retracts relative to the center of the supporting roller body 4100. Specifically, the telescopic mechanism 31212 of the pressure roller assembly in the pressure roller assembly 3120 is configured to cause the corresponding pressure roller 31211 to extend and retract in a direction perpendicular to the surface of the supporting roller body 4100.
[0038] The device also includes a mounting bracket comprising a support beam 3111 and side panels 3112 on either side of the support beam 3111. The pressure roller assembly 3120 is mounted between the side panels 3112. The side panels 3112 have an inclined underside, with the front lower edge of the side panels 3112 at a higher height than the rear lower edge of the side panels 3112. Specifically, the side panels 3112 have a ladder-like structure. When the telescopic mechanism 31212 is retracted, the lower edge of the pressure roller 31211 is lower than the corresponding lower edge of the side panels 3112.
[0039] In this embodiment, the device further includes an inlet roller 3101 and a guide roller 3103. The inlet roller 3101 is disposed upstream of the pressure roller assembly 3120. The inlet roller 3101 is used to introduce the first material layer 5100 into the pressure roller assembly 3120. The inlet roller 3101 is connected to a height adjustment mechanism 3102. The inlet roller 3101 is disposed adjacent to the pressure roller assembly 3120, and the end of the guide roller is connected to the height adjustment mechanism 3102. The height adjustment mechanism 3102 is a screw adjustment mechanism that adjusts the vertical position of the inlet roller 3101. The guide roller 3103 is disposed downstream of the pressure roller assembly 3100. The guide roller 3103 is used to guide the composite material 5300 that has passed through the pressure roller assembly 3100 and the abutting roller body 4100. Example 3
[0040] This embodiment discloses a composite system 3000, comprising a plurality of pressure roller assemblies 3120; and the spacing between pressure rollers 31211 between the pressure roller assemblies 3120 is different; and / or, the maximum extension length of the telescopic mechanism 31212 between the pressure roller assemblies 3120 is different; and / or, the height difference between adjacent pressure rollers 31211 between the pressure roller assemblies 3120 is different; and / or, the surface material of the pressure rollers 31211 between the pressure roller assemblies 3120 is different; and / or, the surface roughness of the pressure rollers 31211 between the pressure roller assemblies 3120 is different.
[0041] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention shall be included within the scope of protection of the claims of the present invention.
Claims
1. A pressing roller device, characterized in that: It includes a pressure roller combination, which is formed by more than two pressure roller assemblies. The pressure roller assembly includes a pressure roller and a telescopic mechanism connected to the pressure roller; and in the direction from the front to the rear, the pressure roller assemblies in the pressure roller combination are arranged in descending height; the pressure roller near the upstream end of the pressure roller combination is the initial pressure roller, and the pressure roller near the downstream end of the pressure roller combination is the finishing pressure roller, and the diameter D1 of the initial pressure roller is less than the diameter D2 of the finishing pressure roller.
2. The pressing roller device according to claim 1, characterized in that: There is one or more transition lamination rollers between the initial lamination roller and the final lamination roller; the diameter D1 of the initial lamination roller is less than or equal to the diameter D3 of the transition lamination roller, and the diameter D3 of the transition lamination roller is less than or equal to the diameter D2 of the final lamination roller; or, the diameter D1 of the initial lamination roller is greater than the diameter D3 of the transition lamination roller.
3. The pressing roller device according to claim 2, characterized in that: The range of D1 is 120~180mm; the range of D2 is 180~200mm; and the range of D3 is 120~200mm.
4. The pressing roller device according to any one of claims 1 to 3, characterized in that: The surface hardness H1 of the preliminary pressing roller is greater than the surface hardness H2 of the finishing pressing roller.
5. The pressing roller device according to claim 4, characterized in that: There is one or more transition pressing rollers between the initial pressing roller and the final pressing roller; the pressing roller components in the pressing roller combination are arranged in an arc shape; the surface hardness H1 of the initial pressing roller is greater than the surface hardness H3 of the transition pressing roller and greater than the surface hardness H2 of the final pressing roller.
6. The pressing roller device according to claim 5, characterized in that: The H1 range is 45~55 degrees; the H3 range is 35~45 degrees; the H2 range is 25~35 degrees.
7. A composite system, characterized in that: It comprises the pressing roller device according to any one of claims 1 to 6 and a supporting roller body matched with the pressing roller device.
8. The composite system according to claim 7, characterized in that The telescopic direction of the telescopic mechanism is relative to the center of the supporting roller body.
9. The composite system according to claim 7, characterized in that Application in the production of composite current collectors.
10. The composite system according to any one of claims 7 to 9, characterized in that: It also includes a guide roller, which is arranged downstream of the pressure roller device; and the guide roller is used to guide away the material passing through the pressure roller device and the abutting roller body.