Composite device and manufacturing system of composite foil

Abstract

The utility model discloses a composite device and a composite foil manufacturing system, the composite device comprises a compression roller combination, an abutting roller body and a guiding and separating roller, and the compression roller combination is formed by more than two compression roller assemblies; the compression roller combination is at least used for transmitting a first material layer; the surface of the abutting roller body carries a second material layer, and the pressing roller combination and the surface of the abutting roller body are configured to jointly press the first material layer and the second material layer to obtain a composite material; the guide roller is used for pulling the composite material to leave the surface of the propping roller body; a stripping angle is formed by the guiding and separating roller, the most downstream pressing roller in the pressing roller combination and the abutting roller body, the stripping angle is an included angle formed by a composite material segment between the pressing roller combination and the guiding and separating roller and a tangent line of the stripped position of the second material layer on the abutting roller body, and the angle is 0-15 degrees. Through cooperation of the abutting roller body, the pressing roller and the guiding and separating roller, the situation that materials are torn or not completely stripped in the process from compounding to guiding and separating is avoided; the stripping effect is improved, compounding and stripping of corresponding foils are promoted, and the production yield and the production efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of composite material manufacturing equipment, and more specifically, to a composite device and a composite foil manufacturing system. Background Art

[0002] Prior art methods for producing composite foils disclose a method for laminating a substrate and foil on the surface of a cathode roller to produce the composite foil. Multiple identical pressure rollers arranged circumferentially along the cathode roller apply downward pressure to press the substrate and foil layers together. A downstream turning roller then removes the composite material from the cathode roller. However, this process neglects the coordination between the cathode roller, pressure roller, and turning roller. For example, if the turning range is large, the foil on the cathode roller surface is typically only a few microns thick, making it susceptible to tearing or incomplete peeling during the removal process. This increases scrap rates and hinders sustained, efficient production.

[0003] Therefore, the prior art urgently needs an optimized composite device to improve the peeling effect, promote the corresponding foil composite and peeling, and improve the production yield and production 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 composite device to facilitate the production of composite foils and improve the corresponding production quality.

[0005] The technical solution adopted by the present invention is a composite device, including a pressure roller combination, a supporting roller body and a deflecting roller, wherein the pressure roller combination is formed by two or more pressure roller assemblies; the pressure roller combination at least transmits the first material layer; the surface of the supporting roller body carries the second material layer, and the pressure roller combination and the surface of the supporting roller body are configured to jointly press the first material layer and the second material layer to obtain a composite material; the deflecting roller is used to pull the composite material away from the surface of the supporting roller body; and the downstream pressure roller and the supporting roller body in the deflecting roller and pressure roller combination form a peeling angle, which is the angle formed by the composite material segment between the pressure roller combination and the deflecting roller and the tangent line of the peeled position of the second material layer on the supporting roller body; the peeling angle is 0 to 15°.

[0006] When the first material layer passes between the pressure roller assembly and the abutting roller carrying the second material layer, the pressure roller assembly presses the first material layer onto the second material layer, pressing downward toward one side of the second material layer to achieve 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, at least two areas of the corresponding cylindrical side surfaces are pressed together. This not only facilitates extending the pressing time and improving the pressing quality while ensuring continuous material production, but also facilitates the configuration of different pressing areas based on material characteristics. After passing through the laminating area, when the second material layer is peeled from the surface of the abutting roller, the peeling angle formed by the cooperation with the downstream pressure roller assembly and the guide roller in the pressure roller combination facilitates the smooth and gradual removal of the second material layer from the abutting roller, close to the tangent line of the abutting roller where it is peeled. The 0-15° peeling angle formed by the cooperation between the three prevents large-angle peeling. Furthermore, the rotation of the abutting roller to output toward the peeling side can utilize the second material layer's own movement direction to avoid the increased tension caused by entanglement between the pressure roller and the abutting roller. Essentially, only the adhesion between the second material layer and the abutting roller needs to be overcome, thereby improving the peeling effect. Furthermore, when the second material layer is a metal foil layer only a few microns thick, the composite peeling effect of the composite device of the present application is even more significant, effectively reducing the occurrence of foil breakage and tensile damage. The composite device of the present application facilitates the composite of ultra-thin materials, ensures smooth composite and peeling of materials, and improves the composite yield rate, especially for ultra-thin materials.

[0007] Furthermore, the pressing direction of the pressure roller assembly is perpendicular to the tangent line of the corresponding abutting position of the abutting roller. That is, when the pressure roller is controlled by a telescopic mechanism, the telescopic mechanism's telescopic direction is perpendicular to the corresponding abutting roller. This allows for a perpendicular abutting roller to press the material together. This pressing direction ensures sufficient contact with the material, ensuring a tight press fit. It also prevents the composite material from shifting or sliding forward or backward during the pressing process.

[0008] Furthermore, the deflection roller is positioned opposite the abutting roller, with the end of the deflection roller closest to the abutting roller co-located with the location on the abutting roller where the second material layer is to be peeled off. Furthermore, the peeling angle is 0°. The composite material can then be guided along the direction of travel of the composite material after lamination, coordinated with the rolling feed of the abutting roller to smoothly and continuously discharge the composite material and peel it off the abutting roller. This peeling angle minimizes resistance to peeling.

[0009] Furthermore, the pressure roller near the upstream end of the pressure roller combination is the preliminary 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 preliminary pressure roller is less than the diameter D2 of the finishing pressure roller. In the present application, the preliminary pressure roller is set to a smaller diameter, which is beneficial for the preliminary pressure roller to concentrate its action on the material composite, and on the other hand, it is convenient to provide a larger material entry angle range, so as to adjust the corresponding composite material entry angle according to the material characteristics. Setting the finishing pressure 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 finishing pressure roller. Based on this diameter design, in conjunction with the aforementioned pressure roller combination, the entire process can achieve targeted optimization of each stage from the time the composite material enters the pressing area, is pressed and peeled, thereby significantly improving the material composite quality and the efficiency of the post-compounding export, and is applicable to a wide range of materials, including ultra-thin materials.

[0010] Furthermore, one or more transition lamination rollers are provided between the initial lamination roller and the final lamination roller; the diameter D3 of the transition lamination roller is greater than the diameter D1 of the initial 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 D3 of the transition lamination roller is less than or equal to the diameter D1 of the initial lamination roller. By coordinating the transition lamination roller with the initial lamination roller and the final lamination roller, their diameters can be utilized to achieve multi-stage lamination and corresponding adjustments during the lamination process, further improving lamination quality.

[0011] Furthermore, the roller closest to the upstream end in the roller combination is the preliminary pressing roller, and the roller closest to the downstream end in the roller combination is the finishing pressing roller; the roller assemblies in the roller combination are configured such that the downward pressing force F1 of the preliminary pressing roller > the downward pressing force F2 of the finishing pressing roller. Setting F1 > F2, when the待 composite material reaches the preliminary pressing roller and starts to be laminated, the preliminary pressing roller provides a strong lamination pressure, thereby tightly laminating the composite layer in the initial bonding state, maintaining sufficient stretching of the composite material in the lamination area, and squeezing out the possible gaps or bubbles in the composite interface towards the upstream input side, thus ensuring that the composite interface of the composite layer passing through the preliminary pressing roller is completely bonded and basically free of obvious bubbles, gaps, etc., improving the lamination quality; while the finishing pressing roller provides a pressing force F2 less than F1, which can avoid excessive stretching caused by strong tensions on both the front and back sides of the composite layer, and avoid wrinkles caused by elastic contraction after passing through the lamination section; there may still be very few air gaps that basically do not affect the performance of the composite layer microscopically in the composite layer passing through the preliminary pressing roller. If the finishing pressing roller also maintains a strong pressing pressure, it may squeeze the air gaps towards the upstream, that is, between the preliminary pressing roller and the finishing pressing roller, and with the progress of the production process, obvious bubbles or wrinkles will continue to accumulate in multiple areas of the composite layer finished product; this will significantly affect the quality of the finally formed product. On the other hand, setting F2 < F1 is also beneficial for the导出 and peeling of the composite layer. The reduction of the pressing pressure of the finishing pressing roller compared to the upstream one is beneficial for reducing the bonding degree of the second material layer on the corresponding abutting roller body, facilitating the detachment of the already laminated second material layer from the corresponding roller body along the transmission direction. If F2 is a strong pressing pressure, it may be possible that as the material progresses, the second material is easily adhered to the corresponding abutting roller body, and with the transmission of the material, it is prone to tearing and other conditions due to uneven stress when导出 the composite layer. The pressure includes the pressure when the corresponding roller acts perpendicular to the surface of the abutting roller body.

[0012] Furthermore, there is one or more intermediate pressing rollers provided between the preliminary pressing roller and the finishing pressing roller; the roller assemblies in the roller combination are configured such that the downward pressing force F1 of the preliminary pressing roller > the downward pressing force F2 of the finishing pressing roller, and the downward pressing force F1 of the preliminary pressing roller > the downward pressing force F3 of the intermediate pressing roller; and / or, the roller assemblies in the roller combination are configured such that the downward pressing force F1 of the preliminary pressing roller > the downward pressing force F3 of the intermediate pressing roller > the downward pressing force F2 of the finishing pressing roller, and the downward pressing forces of the preliminary pressing roller, the intermediate pressing roller, and the finishing pressing roller decrease in sequence, and the decreasing ratio range is 3% - 20%. That is, F1×3% < F1 - F3 < F1×20%, F3×3% < F3 - F2 < F3×20%. Further, the decreasing ratio range is 5% - 15%, F1×5% < F1 - F3 < F1×15%, F3×5% < F3 - F2 < F3×15%. Furthermore, the magnitudes of F1, F2, and F3 are within the range of 0.1 N / in - 10 N / in (0.1 N / inch - 10 N / inch).

[0013] The initial lamination roller combines a relatively large lamination pressure at the initial stage of lamination, so that the downward pressure area is subjected to concentrated force, thereby fully laminating and excluding air bubbles from entering. The finishing lamination roller assists in laminating the composite layer to strengthen the bonding strength. In addition to extending the lamination area of ​​the composite layer during movement, the finishing lamination roller can also slowly release the composite layer, thereby causing it to detach from the abutting roller body and be guided away. The transition lamination roller can at least play the auxiliary lamination role of the finishing lamination roller. Preferably, its downward pressure F3 is also less than F1, and as an intermediate transition lamination roller, it can increase the auxiliary lamination area and further improve the lamination effect. Combined with F3 being less than F1, the initial lamination roller and the finishing lamination roller are coordinated to achieve a gradual slowdown in lamination and release. It provides a more diverse adjustment process, which is convenient for selective adjustment in accordance with material properties and lamination requirements.

[0014] Furthermore, the roller closest to the upstream end of the roller assembly serves as the initial lamination roller, while the roller closest to the downstream end serves as the final lamination roller. 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 force on the composite material passing through it with a smaller active area, thereby improving the initial effects of removing bubbles and other effects. The reduced hardness of the final lamination roller increases the active area with the supporting roller, further improving lamination uniformity after the initial lamination roller has completed initial lamination and removal. This also provides a buffer between the composite material lamination and removal.

[0015] Furthermore, one or more transition lamination rollers are positioned between the initial lamination roller and the final lamination roller. The surface hardness of the initial lamination roller, H1, is greater than the surface hardness of the transition lamination roller, H3; or, 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. 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 the aforementioned H1, H3, and H2 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.

[0016] Another object of the present application is to provide a composite foil manufacturing system, wherein the composite foil comprises a substrate layer and a foil layer composited to at least one side of the substrate layer, and includes the aforementioned composite device. Furthermore, the composite foil comprises a composite current collector.

[0017] Compared with the prior art, the beneficial effects of the present application are: fully realizing the coordination between the supporting roller, the pressure roller and the guide roller, avoiding the situation in which the material is torn or not completely peeled off during the compounding and peeling process. The peeling effect is improved, the compounding and peeling of the corresponding foil materials are promoted, and the production yield and production efficiency are improved. It is especially beneficial to realize the compounding of ultra-thin materials and ensure the smooth compounding and peeling of ultra-thin materials. And based on the further coordination of the diameter, hardness and pressure roller pressure, the regulation of the entire stage from the initial compounding to the composite derivation can be realized, and compared with the prior art, the entire compounding process has been significantly improved. It can significantly improve the material compounding effect, and even for composite materials several microns thick, it can effectively avoid obvious bubbles, wrinkles, etc., facilitate the production of high-quality composite foils, and facilitate the realization of industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the coordinated structure of the introduction roller, the pressure roller assembly and the deflection roller in the composite device of this application.

[0019] Figure 2 This is a schematic structural diagram of the composite device of this application (1).

[0020] Figure 3 This is a three-dimensional structural diagram of the combined introduction roller, pressure roller assembly and deflection roller in the composite device of this application.

[0021] Figure 4 This is a structural schematic diagram of the composite device of this application (II).

[0022] Figure 5 This is a structural schematic diagram of the composite device of this application (3).

[0023] Figure 6 This is a structural schematic diagram of the composite device of this application (IV).

[0024] Description of the drawings: Composite device 3000, introduction roller 3101, height adjustment mechanism 3102, guide roller 3103, support beam 3111, side plate 3112, pressure roller combination 3120, pressure roller 31211, telescopic mechanism 31212, preliminary 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, peeling angle α. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] Example 1

[0028] like Figure 1 、 2 As shown, this embodiment discloses a composite device 3000, including a pressure roller assembly 3120, a holding roller body 4100 and a deflecting roller 3103, wherein the pressure roller assembly 3120 is formed by two or more pressure roller assemblies, and the pressure roller assembly includes a pressure roller 31211 and a telescopic mechanism 31212 connected to the pressure roller 31211; the pressure roller assembly 3120 is at least used to transmit the first material layer 5100; the surface of the holding roller body 4100 carries the second material layer 5200, and the pressure roller assembly 3120 and the surface of the holding roller body 4100 are configured to jointly press the first material layer 5100. The material layer 5100 and the second material layer 5200 form a composite material 5300. The deflecting roller 3103 is used to pull the composite material 5300 away from the surface of the abutting roller 4100. The deflecting roller 3103, the downstreammost pressure roller 31211 of the pressure roller assembly 3120, and the abutting roller 4100 form a peeling angle α. This peeling angle α is the angle formed by the segment of the composite material 5300 between the pressure roller assembly 3120 and the deflecting roller 3103 and the tangent line on the abutting roller 4100 at the location where the second material layer 5200 is peeled. This peeling angle α ranges from 0 to 15 degrees. In this embodiment, the retracting direction of the telescopic mechanism 31212 is perpendicular to the corresponding abutting roller 4100. That is, the pressing direction of the pressure roller assembly is perpendicular to the tangent line of the corresponding abutting location of the abutting roller 4100.

[0029] When the first material layer 5100 passes between the pressure roller assembly 3120 and the abutting roller body 4100, the pressure roller assembly 3120 presses the first material layer 5100 onto the second material layer 5200 wound on the surface of the abutting roller body 4100, pressing downward toward the second material layer 5200 to achieve adhesion between the first and second material layers 5100 and 5200. Furthermore, the first and second material layers 5100 and 5200 exhibit adhesive properties. After passing through the laminating area, the second material layer 5200 is peeled off from the downstreammost pressure roller assembly in the pressure roller assembly 3120 and the surface of the abutting roller body 4100. The peeling angle α formed by the deflection roller 3103 facilitates smooth and gradual removal of the second material layer 5200 from the abutting roller body 4100, aligning closely with the tangent line of the abutting roller body 4100 at which it is peeled. This smooth peeling is achieved by the 0-15° peeling angle α formed by the three components.

[0030] like Figure 3 As shown, in this embodiment, the pressing roller assembly 3120 is mounted on a mounting bracket, which includes a support beam 3111 and side panels 3112 on either side of the support beam 3111. To facilitate the introduction of the first material layer 5100, the composite device 3000 of this embodiment is further provided with an introduction roller 3101, the end of which is connected to a height adjustment mechanism 3102. The upstream first material layer 5100 passes through the introduction roller 3101 and reaches the pressing roller assembly 3120.

[0031] 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. The diameter D1 of the preliminary pressure roller 3121A is less than the diameter D2 of the finishing pressure roller 3121B. There is one or more transition pressure rollers 3121C between the preliminary pressure roller 3121A and the finishing pressure roller 3121B; the diameter D3 of the transition pressure roller 3121C is greater than the diameter D1 of the preliminary pressure roller 3121A, and the diameter D3 of the transition pressure roller 3121C is less than or equal to the diameter D2 of the finishing pressure roller 3121B. In addition, various matching modes can be provided, including the diameter D3 of the transition pressure roller 3121C is less than or equal to the diameter D1 of the preliminary pressure roller 3121A, etc. Figures 4-6 The figure shows different diameter matching methods to match other lamination requirements or material properties. Importantly, in this application, D1 is set to a range of 120-180 mm and D2 is set to a range of 180-200 mm. When the diameter D2 of the finishing lamination roller 3121B is within the larger range, the larger diameter D2 can be used to limit the peel angle α of the composite material 5300 after passing the lamination position to a small angle range, thereby facilitating the peeling at the aforementioned peel angle α.

[0032] In this embodiment, in order to improve the composite effect, the pressing roller assemblies in the pressing roller combination 3120 are configured such that the pressing force F1 of the preliminary pressing roller 3121A is greater than the pressing force F2 of the final pressing roller 3121B. By setting F1 > F2, when the待复合材料5300均到达初步压合辊3121A进行复合时,初步压合辊3121A provides a strong pressing force, thereby tightly pressing the composite layer in the initial bonding state, maintaining sufficient stretching of the待复合材料5300 in the pressing area, and squeezing out any gaps or bubbles that may exist in the composite interface towards the upstream input side; while the final pressing roller 3121B provides a pressing force F2 less than F1, reducing the bonding degree of the wound second material on the corresponding abutting roller body 4100, facilitating the detachment of the already bonded second material layer 5200 from the corresponding roller body along the transmission direction. And when there is more than one intermediate pressing roller 3121C between the preliminary pressing roller 3121A and the final pressing roller 3121B, as Figure 4 shown, the pressing roller assemblies in the pressing roller combination 3120 can be configured such that the pressing force F1 of the preliminary pressing roller 3121A is greater than the pressing force F2 of the final pressing roller 3121B, and the pressing force F1 of the preliminary pressing roller 3121A is greater than the pressing force F3 of the intermediate pressing roller 3121C; specifically, the pressing roller assemblies in the pressing roller combination 3120 are configured such that the pressing force F1 of the preliminary pressing roller 3121A > the pressing force F3 of the intermediate pressing roller 3121C > the pressing force F2 of the final pressing roller 3121B, and the pressing forces of the preliminary pressing roller 3121A, the intermediate pressing roller 3121C, and the final pressing roller 3121B decrease sequentially, with the decreasing ratio ranging from 3% to 20%. That is, F1×3% < F1 - F3 < F1×20%, F3×3% < F3 - F2 < F3×20%. To further improve the effect, the decreasing ratio range can be set to be 5% to 15%, F1×5% < F1 - F3 < F1×15%, F3×5% < F3 - F2 < F3×15%.

[0033] In addition to directly improving the pressing force, it can also be further improved in terms of hardness. For example, the surface hardness H1 of the preliminary pressing roller 3121A is set to be greater than the surface hardness H2 of the final pressing roller 3121B. And when there is more than one intermediate pressing roller 3121C between the preliminary pressing roller 3121A and the final pressing roller 3121B, the surface hardness H1 of the preliminary pressing roller 3121A > the surface hardness H3 of the intermediate pressing roller 3121C; or, the surface hardness H1 of the preliminary pressing roller 3121A > the surface hardness H3 of the intermediate pressing roller 3121C ≥ the surface hardness H2 of the final pressing roller 3121B. In this embodiment, the range of H1 is 45 to 55 degrees; the range of H3 is 35 to 45 degrees; the range of H2 is 25 to 35 degrees.

[0034] Embodiment 2

[0035] This embodiment discloses a composite device 3000, as Figure 4 As shown, this embodiment differs from Example 1 in that the peeling is performed directly based on a peeling angle α of 0°. At this point, the guide roller 3103 is positioned opposite the abutting roller 4100, and the end of the guide roller 3103 closest to the abutting roller 4100 is located on the same tangent line as the location on the abutting roller 4100 where the second material layer 5200 is peeled off. That is, the peeling angle α is 0°. Following the direction of travel of the composite material 5300 after lamination, the composite material 5300 is guided out, coordinated with the rolling feed of the abutting roller 4100, to ensure smooth and continuous delivery and peeling from the abutting roller 4100.

[0036] Example 3

[0037] This embodiment discloses a composite device 3000, which differs from Example 1 in that: in this embodiment, the diameter D2 of the finishing lamination roller 3121B is set to 80 mm, and a peeling roller is configured so that peeling is performed at a peeling angle α of 60°. The peeling process was repeated twenty times, as in Example 1. The first material layer included a 4 μm PET film with a 2 μm adhesive layer on the PET film, and the second material layer was a 1.8 μm copper foil layer. The proportion of breakage during the peeling process was compared. The results showed that no breakage occurred during the production process of the composite device 3000 of Example 1, while this embodiment had two peeling fractures and one peeling damage. That is, based on the composite device 3000 of Example 1, the problems of breakage and incomplete peeling that are prone to occur during the composite process of this type of ultra-thin layer structure can be solved.

[0038] Example 4

[0039] This embodiment discloses a composite foil manufacturing system. The composite foil includes a substrate layer and a foil layer laminated to at least one side of the substrate layer, and includes the aforementioned laminating device 3000. Specifically, the composite foil may include a composite current collector, which includes at least a substrate layer and foil layers laminated to both sides of the substrate layer. The aforementioned first material layer 5100 may be a thin film substrate layer with an adhesive layer attached, and the second material layer 5200 may be a foil layer.

[0040] 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 composite device, characterized in that: It includes a pressure roller combination, a supporting roller body and a deflecting roller, wherein the pressure roller combination is formed by two or more pressure roller assemblies; the pressure roller combination is at least used to transmit the first material layer; the surface of the supporting roller body carries the second material layer, and the pressure roller combination and the surface of the supporting roller body are configured to jointly press the first material layer and the second material layer to obtain a composite material; the deflecting roller is used to pull the composite material away from the surface of the supporting roller body; and the downstream pressure roller and the supporting roller body in the deflecting roller and pressure roller combination form a peeling angle, which is the angle formed by the composite material segment between the pressure roller combination and the deflecting roller and the tangent line of the peeled position of the second material layer on the supporting roller body; the peeling angle is 0 to 15°.

2. The composite device according to claim 1, characterized in that The pressure roller close to the upstream end of the pressure roller combination is the initial pressure roller, and the pressure roller close to the downstream end of the pressure roller combination is the final pressure roller. The diameter D1 of the initial pressure roller is less than the diameter D2 of the final pressure roller.

3. The composite device according to claim 2, characterized in that There is one or more transitional pressing rollers between the preliminary pressing roller and the final pressing roller; the diameter D3 of the transitional pressing roller is greater than the diameter D1 of the preliminary pressing roller, and the diameter D3 of the transitional pressing roller is less than or equal to the diameter D2 of the final pressing roller.

4. The composite device according to claim 3, characterized in that The transition pressing roller diameter D3 is less than or equal to the initial pressing roller diameter D1.

5. The composite device according to any one of claims 1 to 4, characterized in that: 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 final pressure roller; the pressure roller components in the pressure roller combination are configured so that the downward pressure F1 of the initial pressure roller is greater than the downward pressure F2 of the final pressure roller.

6. The composite device according to claim 5, characterized in that There is also one or more transition lamination rollers between the initial lamination roller and the final lamination roller; the lamination roller components in the lamination roller combination are configured so that the initial lamination roller downward pressure F1 is greater than the final lamination roller downward pressure F2, and the initial lamination roller downward pressure F1 is greater than the transition lamination roller downward pressure F3; and / or, the lamination roller components in the lamination roller combination are configured so that the initial lamination roller downward pressure F1 is greater than the transition lamination roller downward pressure F3 and the final lamination roller downward pressure F2, and the initial lamination roller, the transition lamination roller and the final lamination roller downward pressure decrease in sequence, with the decrease ratio ranging from 3% to 20%.

7. The composite device according to any one of claims 1 to 4, characterized in that: The pressure roller close to the upstream end of the pressure roller combination is the initial pressure roller, and the pressure roller close to the downstream end of the pressure roller combination is the final pressure roller; the surface hardness H1 of the initial pressure roller is greater than the surface hardness H2 of the final pressure roller.

8. The composite device according to claim 7, characterized in that There is one or more transition lamination rollers between the initial lamination roller and the final lamination roller; the surface hardness H1 of the initial lamination roller is greater than the surface hardness H3 of the transition lamination roller; or the surface hardness H1 of the initial lamination roller is greater than the surface hardness H3 of the transition lamination roller ≥ the surface hardness H2 of the final lamination roller.

9. The composite device according to claim 8, characterized in that The H1 range is 45 to 55 degrees; the H3 range is 35 to 45 degrees; the H2 range is 25 to 35 degrees.

10. A manufacturing system for a composite foil, the composite foil comprising a substrate layer and a foil layer composited to at least one side of the substrate layer, characterized in that: The composite foil manufacturing system comprises the composite device according to any one of claims 1 to 9.

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