Graphite film production anti-edge lifting device

Abstract

The utility model relates to the field of graphite material processing equipment, the utility model discloses a kind of edge lifting prevention devices for graphite film production, it include: pedestal, film material walks in the top of pedestal;Auxiliary film pressing roller assembly, vacuum adsorption component, auxiliary film pressing roller assembly and vacuum adsorption component are installed on pedestal, and it is in upside-down formula distribution, the edge of film material walks between auxiliary film pressing roller assembly and vacuum adsorption component, auxiliary film pressing roller assembly is used to press the edge of film material, vacuum adsorption component is integrated on support platform, and 5-10mm wide vacuum adsorption area is generated when working, the edge of film material is pressed to support platform.The utility model provides a kind of edge lifting prevention devices for graphite film production, auxiliary film pressing roller assembly and vacuum adsorption component form "pressing→adsorption" relay type collaborative working mode one above another, solve the problem of edge lifting, improve production stability and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of graphite material processing equipment, specifically to an anti-warping device for graphite film production. Background Technology

[0002] In the production and processing of high-performance graphite films, the calendering process is a crucial step in ensuring uniform film thickness and a smooth surface. Currently, the common process in calendering workshops is to first calender the bare graphite film, and then perform a secondary coating to complete production. Due to the separation of processes, the "calendering + secondary coating" operation is carried out in two steps, increasing the number of steps, complicating the operation process, reducing efficiency, and consequently increasing production costs.

[0003] Existing technologies also achieve integrated calendering and coating functions, such as the calendering and coating forming integrated machine disclosed in Chinese patent document CN206690428U. However, they all lack a dedicated anti-warping design, and the edge warping rate of the film material is as high as 8-10% (0.1mm thick graphite film). The severe warping seriously affects the stability of graphite film production and the quality of finished products. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model discloses an anti-warping device for graphite film production, solving the problem of severe warping after graphite film calendering and coating. It includes: The membrane material travels on top of the base; The auxiliary pressing roller assembly and the vacuum adsorption assembly are mounted on the base and distributed vertically. The edge of the membrane material travels between the auxiliary pressing roller assembly and the vacuum adsorption assembly. The auxiliary pressing roller assembly is used to press the edge of the membrane material together. The vacuum adsorption assembly is integrated on the support platform and generates a 5-mm wide vacuum adsorption area during operation, pressing the edge of the membrane material toward the support platform.

[0005] Furthermore, the top of the base is a membrane contact surface layer, on which a hydrophilic coating is provided.

[0006] Furthermore, the auxiliary pressing roller assembly includes: The pressure roller has slightly convex arc surfaces at both ends to concentrate pressure on the edge of the membrane material and prevent the membrane material from tearing. A floating support is used to sink the pressure roller to press the edge of the film material.

[0007] Furthermore, the auxiliary pressing roller assembly also includes: The output end of the miniature servo motor is connected to the top of the lead screw via a backlash-free coupling. Ball nut, the ball nut is sleeved on the lead screw, the ball nut is installed on the floating bracket; A linear guide rail consists of two parallel guide rails, a floating bracket with a slider that mates with the guide rails, and the linear guide rail is mounted on a base. The elastic buffer assembly is located at the bottom of the floating support and is connected between the floating support and the base.

[0008] Furthermore, the vacuum adsorption assembly is spaced 100mm apart from the auxiliary pressure roller assembly along the traveling direction of the membrane material. After the auxiliary pressure roller assembly completes the pressing, the membrane material travels 100mm on the support platform to the vacuum adsorption area. The vacuum adsorption area includes an edge starting area A1, a middle transition area A2, and an edge stopping area A3 distributed along the width direction of the membrane material. The edge starting area A1 is located within 0-2mm from the edge of the membrane material towards the center and uses micropores with a density of B1. The middle transition area A2 is located within 2-8mm from the edge of the membrane material towards the center and uses micropores with a density of B2. The edge stopping area A3 is located within 8-10mm from the edge of the membrane material towards the center and uses micropores with a density of B3. Among them, B1 > B2 > B3.

[0009] Furthermore, the vacuum adsorption assembly includes a main housing, which is embedded in a support platform. The top of the main housing is coplanar with the top of the support platform. The vacuum adsorption area is distributed at the top of the main housing, and the vacuum chamber is located inside the main housing.

[0010] Furthermore, the base is provided with a regulating chamber for accommodating the regulating valve assembly, which is connected between the negative pressure source and the vacuum chamber via a pipeline.

[0011] Furthermore, the elastic buffer assembly is a nitrogen spring or a hydraulic damper, used to provide constant pressure.

[0012] Furthermore, an edge position sensor for detecting edge deformation of the membrane material is also installed on the base.

[0013] Compared with the prior art, the present invention has the following advantages: This utility model provides an anti-warping device for graphite film production. The anti-warping device includes a follow-up pressing of the auxiliary pressing roller assembly and negative pressure fixing of the vacuum adsorption assembly. Combined with a partitioned micropore design (density gradient of B1>B2>B3), it effectively suppresses edge warping, improves the finished product qualification rate, and ensures the flatness and thickness uniformity of the film surface. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the anti-warping device for graphite film production according to the present invention; Figure 2 This is a schematic diagram of the auxiliary pressure roller assembly in an anti-warping device for graphite film production according to this utility model. Figure 3 This is a schematic diagram of the floating support structure in an anti-warping device for graphite film production according to the present invention; Figure 4 This is a schematic diagram of the vacuum adsorption component in an anti-warping device for graphite film production according to this utility model.

[0016] In the figure: 10. Base; 11. Auxiliary pressure roller assembly; 12. Vacuum adsorption assembly; 13. Pressure roller; 14. Floating bracket; 15. Micro servo motor; 16. Lead screw; 17. Ball nut; 18. Linear guide rail; 19. Elastic buffer assembly; 20. Main housing; 21. Vacuum chamber. Detailed Implementation

[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] Example: The present invention will now be further described with reference to the accompanying drawings.

[0019] like Figure 1 As shown in the figure, this embodiment provides an anti-warping device for graphite film production, comprising: Base 10, the membrane material travels on the top of base 10; The auxiliary pressing roller assembly 11 and the vacuum adsorption assembly 12 are mounted on the base 10 and are arranged vertically. The edge of the membrane material travels between the auxiliary pressing roller assembly 11 and the vacuum adsorption assembly 12. The auxiliary pressing roller assembly 11 is used to press the edge of the membrane material together. The vacuum adsorption assembly 12 is integrated into the support platform and generates a 5-10mm wide vacuum adsorption area during operation, pressing the edge of the membrane material toward the support platform.

[0020] The working principle and beneficial effects of the above technical solution are as follows: This utility model discloses an anti-warping device for graphite film production. The base 10 is installed 50mm from the outlet of the calendering and coating forming integrated machine. After the film material is fed out from the outlet of the calendering and coating forming integrated machine, the edge of the film material is pressed by the auxiliary pressing roller assembly 11. The film material continues to move forward 100mm to the vacuum adsorption assembly 12. The vacuum adsorption area generates a negative pressure of 5-10kPa, while the upper part of the film material, under the action of atmospheric pressure, presses the edge of the film material against the support platform to prevent warping. The entire process is integrated, realizing continuous processing. This utility model provides an anti-warping device for graphite film production. The auxiliary pressing roller assembly 12 and the vacuum adsorption assembly 13 form a relay-style collaborative working mode of "pressing → adsorption," solving the warping problem and improving production stability and efficiency.

[0021] In one embodiment, the top of the base 10 is a membrane contact surface layer, and a hydrophilic coating is provided on the membrane contact surface layer.

[0022] The beneficial effects of the above technical solution are as follows: The hydrophilic coating can enhance the adhesion between the membrane and the support platform, reduce slippage and offset, and ensure stable adsorption effect.

[0023] like Figure 2 and Figure 3 As shown, in one embodiment, the auxiliary pressure roller assembly 12 includes: The pressure roller 13 has two ends with slightly convex arc surfaces to concentrate the pressure on the edge of the membrane material and prevent the membrane material from tearing. The floating support 14 and the pressure roller 13 are mounted on the floating support 14 to allow the pressure roller 13 to sink and press the edge of the film material.

[0024] The working principle and beneficial effects of the above technical solution are as follows: The slightly convex arc surface of the pressure roller 13 concentrates the pressure in a 5-10mm area at the edge of the film material to avoid overall tearing, while the floating support 14 sinks through an elastic mechanism to press the edge and ensure a tight fit. This concentrated pressing can suppress edge warping.

[0025] like Figure 3As shown, in one embodiment, the auxiliary pressing roller assembly 12 further includes: The output end of the micro servo motor 15 is connected to the top end of the lead screw 16 via a backlash-free coupling. Ball nut 17 is sleeved on lead screw 16 and mounted on floating bracket 14; The linear guide 18 includes two parallel guide rails, and a slider that mates with the guide rails is mounted on the floating bracket 14. The linear guide 18 is mounted on the base 10. The elastic buffer assembly 19 is located at the bottom end of the floating support 14 and is connected between the floating support 14 and the base 10.

[0026] The working principle and beneficial effects of the above technical solution are as follows: A miniature servo motor 15 drives the lead screw 16 to rotate, and the ball nut 17 moves the floating bracket 14 along the linear guide rail 18 to adjust the lifting height of the pressure roller 13. An elastic buffer assembly 19 provides constant pressure and absorbs vibration. Automated adjustment is achieved through servo control, ensuring timely response. The linear guide rail ensures smooth operation, while the elastic buffer assembly protects against impacts. This design is suitable for high-speed production.

[0027] like Figure 4 As shown, in one embodiment, the vacuum adsorption assembly 12 is spaced 100mm apart from the auxiliary pressure roller assembly 12 along the traveling direction of the membrane material. After the auxiliary pressure roller assembly 11 completes the pressing, the membrane material travels 100mm on the support platform to the vacuum adsorption area. The vacuum adsorption area includes an edge starting area A1, a middle transition area A2, and an edge stopping area A3 distributed along the width direction of the membrane material. The edge starting area A1 is located within 0-2mm from the edge of the membrane material towards the center and uses micropores with a density of B1. The middle transition area A2 is located within 2-8mm from the edge of the membrane material towards the center and uses micropores with a density of B2. The edge stopping area A3 is located within 8-10mm from the edge of the membrane material towards the center and uses micropores with a density of B3. Wherein, B1 > B2 > B3.

[0028] The working principle and beneficial effects of the above technical solution are as follows: The laminated membrane continues forward for 100mm (as a buffer distance) before entering the vacuum adsorption zone. The vacuum adsorption zone includes an edge initiation zone A1, a central transition zone A2, and an edge termination zone A3 distributed along the width of the membrane. The micropore density gradually changes; for example, B1 is high density (e.g., 50 pores per mm²), B2 is medium density (e.g., 30 pores per mm²), and B3 is low density (e.g., 10 pores per mm²) to create a negative pressure gradient and uniformly fix the edges. Gradual adsorption reduces stress abrupt changes and suppresses edge warping.

[0029] In one embodiment, the vacuum adsorption assembly 13 includes a main housing 20, which is embedded in a support platform. The top of the main housing 20 is flush with the support platform. The vacuum adsorption area is distributed at the top of the main housing 20, and the vacuum chamber 21 is located inside the main housing 20.

[0030] The working principle of the above technical solution is as follows: The main housing 20 is embedded in the platform, and the vacuum chamber 21 is connected to a negative pressure source (pump) so that the vacuum adsorption area located at the top of the main housing 20 generates an adsorption force.

[0031] In one embodiment, the base 10 is provided with a regulating chamber for accommodating a regulating valve assembly, which is connected between the negative pressure source and the vacuum chamber 21 via a pipeline.

[0032] The working principle of the above technical solution is as follows: The regulating valve assembly includes a proportional solenoid valve and a flow sensor, which are connected to the control system to form a closed-loop control circuit. During operation, the control system automatically adjusts the opening of the proportional solenoid valve based on data from the edge position sensor, thereby precisely controlling the negative pressure entering the vacuum chamber 21. The specific workflow is as follows: Data acquisition: Edge position sensors monitor the membrane edge thickness in real time and transmit the data to the control system; Parameter matching: The control system determines the target negative pressure value based on the pre-stored "negative pressure-thickness matching table"; Valve regulation: The proportional solenoid valve adjusts its opening according to the target value, and the flow sensor provides real-time feedback of the negative pressure value; Closed-loop control: The control system compares the target value with the actual value and dynamically adjusts the opening of the solenoid valve to ensure that the negative pressure remains stable within the set range.

[0033] In one embodiment, the elastic buffer assembly 19 is a nitrogen spring or a hydraulic damper used to provide constant pressure.

[0034] The working principle and beneficial effects of the above technical solution are as follows: A nitrogen spring or hydraulic damper serves as an elastic buffer component 19, forming a dual pressure control mechanism of "mechanical + electrical control" together with a micro servo motor 15, a ball nut 17, and a linear guide rail 18. The damping characteristics of the nitrogen spring effectively absorb high-frequency vibrations, preventing the membrane material from warping due to vibration.

[0035] In one embodiment, an edge position sensor for detecting edge deformation of the membrane material is also installed on the base 10.

[0036] The beneficial effects of the above technical solution are as follows: The edge position sensor uses a laser displacement sensor (such as Keyence LK-G5000), which is installed on the side of the base 10, with the detection end aligned with the edge area of ​​the membrane material.

[0037] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A device for preventing edge warping in graphite film production, characterized in that, include: The base (10) has a membrane material running on top of it; The auxiliary pressing roller assembly (11) and the vacuum adsorption assembly (12) are mounted on the base (10) and are arranged vertically. The edge of the membrane material travels between the auxiliary pressing roller assembly (11) and the vacuum adsorption assembly (12). The auxiliary pressing roller assembly (11) is used to press the edge of the membrane material. The vacuum adsorption assembly (12) is integrated on the support platform and generates a 5-10 mm wide vacuum adsorption area during operation, pressing the edge of the membrane material toward the support platform.

2. The anti-warping device for graphite film production according to claim 1, characterized in that, The top of the base (10) is a membrane contact surface layer, and a hydrophilic coating is provided on the membrane contact surface layer.

3. The anti-warping device for graphite film production according to claim 1, characterized in that, The auxiliary pressure roller assembly (11) includes: The pressure roller (13) has two ends with slightly convex arc surfaces to concentrate pressure on the edge of the film material and prevent the film material from tearing. A floating support (14) is provided, on which the pressure roller (13) is mounted to allow the pressure roller (13) to sink and press the edge of the film.

4. The anti-warping device for graphite film production according to claim 3, characterized in that, The auxiliary pressure roller assembly (11) also includes: A micro servo motor (15) is provided, the output end of which is connected to the top of a lead screw (16) via a backlash-free coupling. A ball nut (17) is sleeved on a lead screw (16) and mounted on a floating bracket (14); Linear guide rail (18), the linear guide rail (18) includes two parallel guide rails, the floating bracket (14) is equipped with a slider that cooperates with the guide rail, and the linear guide rail (18) is mounted on the base (10); An elastic buffer assembly (19) is located at the bottom end of the floating support (14) and is connected between the floating support (14) and the base (10).

5. The anti-warping device for graphite film production according to claim 1, characterized in that, The vacuum adsorption assembly (12) is spaced 100mm from the auxiliary pressure roller assembly (11) along the traveling direction of the membrane material. After the auxiliary pressing roller assembly (11) completes the pressing, the film material travels 100mm on the support platform to the vacuum adsorption area. The vacuum adsorption area includes an edge starting area A1, a middle transition area A2, and an edge stopping area A3 distributed along the width direction of the film material. The edge starting area A1 is located within 0-2mm from the edge of the film material to the center and uses micropores with a density of B1. The middle transition area A2 is located within 2-8mm from the edge of the film material to the center and uses micropores with a density of B2. The edge stopping area A3 is located within 8-10mm from the edge of the film material to the center and uses micropores with a density of B3. Among them, B1 > B2 > B3.

6. The anti-warping device for graphite film production according to claim 5, characterized in that, The vacuum adsorption assembly (12) includes a main housing (20), which is embedded in a support platform. The top of the main housing (20) is coplanar with the top of the support platform. The vacuum adsorption area is distributed at the top of the main housing (20), and the vacuum chamber (21) is located inside the main housing (20).

7. The anti-warping device for graphite film production according to claim 1, characterized in that, The base (10) is provided with a regulating chamber for accommodating the regulating valve group, which is connected between the negative pressure source and the vacuum chamber (21) through a pipeline.

8. The anti-warping device for graphite film production according to claim 4, characterized in that, The elastic buffer assembly (19) is a nitrogen spring or a hydraulic damper used to provide constant pressure.

9. The anti-warping device for graphite film production according to claim 1, characterized in that, An edge position sensor for detecting edge deformation of the membrane material is also installed on the base (10).

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