Continuous rolling system of a roll-shaped graphene heat-conducting film

Abstract

The utility model discloses a continuous roll system of roll shape graphene heat conduction film, including exhaust passage generation roll, the fixed setting of the circumference outer wall of exhaust passage generation roll has the puncture disc, and the outer ring surface of puncture disc is fixedly set up and has the lancet, the bottom of exhaust passage generation roll is equipped with the preheating roller body simultaneously, and the main shaft of preheating roller body and exhaust passage generation roll is all through bearing seat swing joint on support frame, and the main shaft end of preheating roller body is equipped with lower gear, and the main shaft end of exhaust passage generation roll is equipped with upper gear. The continuous roll system of roll shape graphene heat conduction film, when extruding through the preheating roller body of smooth surface, or the extruding of subsequent press roll, the gas in the heat conduction film can be all discharged from the exhaust passage on the heat conduction film, avoid the situation of the surface defect of subsequent product due to the incomplete exhaust of heat conduction film.

Description

Technical Field

[0001] This utility model relates to the field of graphene, specifically to a continuous rolling system for a roll-shaped graphene thermal conductive film. Background Technology

[0002] Graphene thermal conductive films, with their excellent thermal conductivity and relatively low production cost, are finding increasingly wider applications in various new electronic products. Currently, the fabrication process for graphene thermal conductive film sheets is very mature. To achieve mass production and continuous roll-to-roll production, similar to synthetic graphene films, facilitating subsequent die-cutting and avoiding waste during the die-cutting process, researchers have begun focusing on the process research of roll-shaped graphene thermal conductive films. However, roll-shaped graphene thermal conductive films release a large amount of gas and impurities during sintering, and the foam film contains numerous voids and other defects. This results in many air bubbles during calendering. Traditional rolling mills cannot achieve the ideal density in a single process, requiring repeated rolling, which greatly inconveniences the calendering process. This patent aims to provide a novel rolling device specifically designed for the calendering of roll-shaped graphene thermal conductive films, solving the problem of repeated rolling and improving calendering efficiency. To address the aforementioned issues, a search revealed Chinese patent CN218227988U, which discloses a continuous rolling system for a roll-shaped graphene thermally conductive film. The system includes an unwinding device, a coarse pressing device, an venting device, a sealing device, a compacting device, and a winding device. A first guide roller is positioned between the coarse pressing device and the venting device; a second guide roller is positioned between the compacting device and the winding device. Although the above-mentioned device can be equipped with an exhaust device in the entire rolling system, so that the purpose of exhausting the foam film can be achieved during the rolling process without the need for separate exhaust treatment, in actual use, when the rolled graphene is calendered and extruded by the rollers, the air inside cannot be completely squeezed out because there are no escape channels on the graphene, thus losing the exhaust function for the graphene. The unexpelled air is squeezed between the graphene layers, forming closed bubbles with diameters ranging from micrometers (μm) to millimeters (mm). If the temperature rises in subsequent processes (such as heating and curing), the air inside the bubbles will expand due to heat, which will cause irregular bulges and protrusions on the surface, damaging the flatness of the material. Utility Model Content

[0003] The purpose of this invention is to provide a continuous rolling system for roll-shaped graphene thermal conductive film to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, a continuous rolling system for a roll-shaped graphene thermally conductive film is provided, including an exhaust channel generating roller. A piercing disc is fixedly disposed on the outer circumferential wall of the exhaust channel generating roller, and a piercing needle is fixedly disposed on the outer ring surface of the piercing disc. Meanwhile, a preheating roller body is installed at the bottom of the exhaust channel generating roller. The main shafts of the preheating roller body and the exhaust channel generating roller are movably connected to a support frame through bearing seats. A lower gear is installed at the end of the main shaft of the preheating roller body, and an upper gear is installed at the end of the main shaft of the exhaust channel generating roller.

[0005] Furthermore, a drive gear is movably mounted on the support frame, and the drive gear is positioned between the upper gear and the lower gear, with both sides of the drive gear meshing with the upper gear and the lower gear respectively.

[0006] Furthermore, a U-shaped frame is installed on the side wall of the support frame, and a drive motor positioning seat is provided on the U-shaped frame. The shaft of the drive gear passes through the drive motor positioning seat and is fixed to the output shaft of the external motor.

[0007] Furthermore, multiple sets of piercing discs are equidistantly arranged on the outer circumference of the exhaust channel generating roller. The piercing discs and the exhaust channel generating roller are in a concentric circle structure. Multiple sets of needles are equidistantly arranged on the outer ring surface of the piercing discs. The needles are conical in shape.

[0008] Furthermore, the preheating roller body includes a lower gear, preheating roller A, preheating roller B, power supply box, heating rod, limiting plate, heat-conducting plate and positioning groove, and preheating roller B is installed at the end of preheating roller A, and the dimensions of preheating roller A and preheating roller B are the same.

[0009] Furthermore, a heat-conducting sheet is fixedly installed on the preheating roller A, and a positioning groove is opened on the side wall of the preheating roller B. The positioning groove is adapted to the size of the heat-conducting sheet, and the heat-conducting sheet is inserted into the inside of the positioning groove.

[0010] Furthermore, the preheating roller A and the preheating roller B are positioned and installed with heat-conducting plates through positioning grooves, and a power supply box is fixedly installed at the bottom of the preheating roller A, while a heating rod is installed on the power supply box.

[0011] Furthermore, eight sets of heating rods are equidistantly arranged inside the preheating roller A, and the eight sets of heating rods heat the preheating roller body. At the same time, two sets of limiting discs are fixedly arranged on the eight sets of heating rods, and the limiting discs abut against the inner circumference of the preheating roller body.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. In this solution, the heat-conducting film is squeezed between the preheating roller and the exhaust channel roller. The multiple rows of piercing discs on the exhaust channel roller exert force on the piercing needles, allowing the piercing needles to pierce the heat-conducting film. This results in a large number of exhaust channels on the surface of the heat-conducting film. When squeezed by the smooth surface of the preheating roller or by the subsequent pressure roller, the gas inside the heat-conducting film can be completely discharged from the exhaust channels on the heat-conducting film, avoiding the occurrence of surface defects in subsequent products due to incomplete exhaust of the heat-conducting film. 2. This solution uses eight sets of equally spaced heating rods to uniformly heat the preheating roller, avoiding excessive local temperature differences that could affect the preheating effect of the thermal conductive film. At the same time, the eight sets of heating rods provide sufficient heating power to quickly reach the required preheating temperature. The overall structural design ensures uniform, stable and reliable heating of the preheating roller, providing a consistent preheating effect for the thermal conductive film and facilitating the smooth progress of subsequent rolling and degassing processes. Attached Figure Description

[0013] Figure 1 This is a front view schematic diagram of the structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the preheating roller body of this utility model; Figure 4 This is a rear view of the structure of this utility model.

[0014] The following are the labeling elements in the diagram: 100, support frame; 200, preheating roller body; 20, lower gear; 21, preheating roller A; 22, preheating roller B; 23, power supply box; 24, heating rod; 25, limiting plate; 26, heat-conducting plate; 27, positioning groove; 300, exhaust channel generating roller; 31, piercing plate; 32, piercing needle; 33, upper gear; 34, drive gear. Detailed Implementation

[0015] Please see Figure 1-4 This utility model provides a continuous rolling system for a roll-shaped graphene thermal conductive film, including an exhaust channel generating roller 300. A piercing disc 31 is fixedly arranged on the outer circumference of the exhaust channel generating roller 300, and a piercing needle 32 is fixedly arranged on the outer ring surface of the piercing disc 31. At the same time, a preheating roller body 200 is installed at the bottom of the exhaust channel generating roller 300. The main shafts of the preheating roller body 200 and the exhaust channel generating roller 300 are movably connected to the support frame 100 through bearing seats. A lower gear 20 is installed at the end of the main shaft of the preheating roller body 200, and an upper gear 33 is installed at the end of the main shaft of the exhaust channel generating roller 300.

[0016] Working Principle: In actual use, when the graphene thermal conductive film is rolled using this device, the film is first squeezed between the preheating roller 200 and the exhaust channel generating roller 300. The multiple rows of piercing discs 31 on the exhaust channel generating roller 300 exert force on the piercing needles 32, allowing the needles 32 to pierce the thermal conductive film, resulting in numerous exhaust channels on the surface of the film. When further squeezed by the smooth preheating roller 200 or subsequent pressure rollers, the interior of the thermal conductive film... The gas can be completely discharged through the exhaust channel on the heat-conducting film, avoiding surface defects in subsequent products due to incomplete exhaust inside the heat-conducting film; the preheating roller 200 and the channel generating roller 300 can move synchronously in opposite directions to transport the heat-conducting film sandwiched between them. Specifically, an external motor drives the drive gear 34 to rotate, and the drive gear 34 drives the upper gear 33 and the lower gear 20 to rotate, so as to realize the synchronous rotation of the preheating roller 200 and the channel generating roller 300. A drive gear 34 is movably mounted on the support frame 100, and the drive gear 34 is located between the upper gear 33 and the lower gear 20. The two sides of the drive gear 34 are respectively meshed with the upper gear 33 and the lower gear 20.

[0017] A U-shaped frame is installed on the side wall of the support frame 100, and a drive motor positioning seat is provided on the U-shaped frame. The rotating shaft of the drive gear 34 passes through the drive motor positioning seat and is fixed to the output shaft of the external motor.

[0018] Multiple sets of piercing discs 31 are equidistantly arranged on the outer circumference of the exhaust channel generating roller 300. The piercing discs 31 and the exhaust channel generating roller 300 are in a concentric circle structure. Multiple sets of needles 32 are equidistantly arranged on the outer ring surface of the piercing discs 31. The needles 32 are conical in shape.

[0019] In a preferred embodiment, the preheating roller body 200 includes a lower gear 20, a preheating roller A21, a preheating roller B22, a power supply box 23, a heating rod 24, a limiting plate 25, a heat-conducting plate 26, and a positioning groove 27. The preheating roller B22 is installed at the end of the preheating roller A21, and the preheating roller A21 and the preheating roller B22 have the same size.

[0020] like Figure 1-3As shown: The multiple rows of piercing discs 31 on the exhaust channel roller 300 apply force to the piercing needles 32, enabling the piercing needles 32 to form a large number of exhaust channels on the surface of the heat-conducting film. This provides an effective path for subsequent extrusion and exhaust. Combined with the extrusion of the preheating roller 200 or subsequent pressure rollers, the gas inside the heat-conducting film can be completely discharged through these channels, fundamentally avoiding surface defects in subsequent products caused by incomplete exhaust. At the same time, the external motor drives the drive gear 34 to rotate, which in turn drives the upper gear 33 and the lower gear 20 to make the preheating roller 200 and the exhaust channel roller 300 move synchronously in opposite directions. This can not only stably transport and hold the heat-conducting film, preventing stretching, wrinkling or displacement during the transport process and ensuring uniform force on the heat-conducting film, but also make the piercing and extrusion actions coordinated, improving the continuity and efficiency of the rolling process, ensuring the stability of the heat-conducting film during processing, and ultimately improving the consistency of product quality and production stability.

[0021] A heat-conducting sheet 26 is fixedly installed on the preheating roller A21, and a positioning groove 27 is provided on the side wall of the preheating roller B22. The positioning groove 27 is adapted to the size of the heat-conducting sheet 26, and the heat-conducting sheet 26 is inserted into the inside of the positioning groove 27.

[0022] The preheating roller A21 and the preheating roller B22 are positioned and installed with the heat-conducting plate 26 through the positioning groove 27, and the bottom of the preheating roller A21 is fixedly provided with a power box 23, and a heating rod 24 is installed on the power box 23.

[0023] Eight sets of heating rods 24 are equidistantly arranged inside the preheating roller A21, and the eight sets of heating rods 24 heat the preheating roller body 200. At the same time, two sets of limiting discs 25 are fixedly arranged on the eight sets of heating rods 24, and the limiting discs 25 abut against the inner circumference of the preheating roller body 200.

[0024] like Figure 1 and Figure 4 As shown: The preheating roller body 200 consists of preheating rollers A21 and B22, which are positioned and installed with the heat-conducting sheet 26 via positioning grooves 27. This ensures the accuracy and structural stability of the two roller assembly while facilitating disassembly and maintenance. The power supply box 23 fixed at the bottom of the preheating roller A21 provides a stable power supply to the heating rods 24. The eight equally spaced heating rods 24 can uniformly heat the preheating roller body 200, avoiding excessive local temperature differences that could affect the preheating effect of the heat-conducting film. At the same time, the eight heating rods 24 provide sufficient power. With sufficient heating power, the required preheating temperature can be quickly reached. The two sets of limiting discs 25 fixed on the heating rod 24 abut against the inner circumference of the preheating roller 200, which can effectively fix the position of the heating rod 24 and prevent it from shifting due to vibration and thermal expansion and contraction during the rotation or heating process of the preheating roller 200, thus ensuring heating stability and safety. The overall structural design makes the preheating roller 200 heat evenly, stably and reliably, providing a consistent preheating effect for the heat-conducting film, which is conducive to the smooth progress of subsequent rolling and degassing processes.

Claims

1. A continuous rolling system for a roll-shaped graphene thermally conductive film, comprising an exhaust channel generating roller (300), characterized in that: A piercing disc (31) is fixedly provided on the outer circumference of the exhaust channel generating roller (300), and a piercing needle (32) is fixedly provided on the outer ring surface of the piercing disc (31). At the same time, a preheating roller body (200) is installed at the bottom of the exhaust channel generating roller (300). The main shafts of the preheating roller body (200) and the exhaust channel generating roller (300) are movably connected to the support frame (100) through bearing seats. A lower gear (20) is installed at the end of the main shaft of the preheating roller body (200), and an upper gear (33) is installed at the end of the main shaft of the exhaust channel generating roller (300).

2. The continuous rolling system for a roll-shaped graphene thermally conductive film according to claim 1, characterized in that: A drive gear (34) is movably mounted on the support frame (100), and the drive gear (34) is located between the upper gear (33) and the lower gear (20). The two sides of the drive gear (34) are respectively meshed with the upper gear (33) and the lower gear (20).

3. The continuous rolling system for a roll-shaped graphene thermally conductive film according to claim 1, characterized in that: A U-shaped frame is installed on the side wall of the support frame (100), and a drive motor positioning seat is provided on the U-shaped frame. The shaft of the drive gear (34) passes through the drive motor positioning seat and is fixed to the output shaft of the external motor.

4. The continuous rolling system for a roll-shaped graphene thermally conductive film according to claim 1, characterized in that: Multiple sets of piercing discs (31) are equidistantly arranged on the outer circumference of the exhaust channel generating roller (300). The piercing discs (31) and the exhaust channel generating roller (300) are in a concentric circle structure. Multiple sets of needles (32) are equidistantly arranged on the outer ring surface of the piercing discs (31). The needles (32) are in a conical shape.

5. The continuous rolling system for a roll-shaped graphene thermally conductive film according to claim 1, characterized in that: The preheating roller body (200) includes a lower gear (20), a preheating roller A (21), a preheating roller B (22), a power supply box (23), a heating rod (24), a limiting plate (25), a heat-conducting plate (26), and a positioning groove (27). The preheating roller A (21) is equipped with a preheating roller B (22) at its end, and the preheating roller A (21) and the preheating roller B (22) have the same size.

6. The continuous rolling system for a roll-shaped graphene thermally conductive film according to claim 5, characterized in that: A heat-conducting sheet (26) is fixedly installed on the preheating roller A (21), and a positioning groove (27) is opened on the side wall of the preheating roller B (22). At the same time, the size of the positioning groove (27) is matched with that of the heat-conducting sheet (26), and the heat-conducting sheet (26) is inserted into the inside of the positioning groove (27).

7. The continuous rolling system for a roll-shaped graphene thermally conductive film according to claim 6, characterized in that: The preheating roller A (21) and the preheating roller B (22) are positioned and installed with the heat-conducting plate (26) through the positioning groove (27), and the bottom of the preheating roller A (21) is fixedly provided with a power box (23), and a heating rod (24) is installed on the power box (23).

8. The continuous rolling system for a roll-shaped graphene thermally conductive film according to claim 7, characterized in that: The heating rods (24) are arranged in eight groups at equal intervals inside the preheating roller A (21), and the eight groups of heating rods (24) heat the preheating roller body (200). At the same time, two sets of limiting discs (25) are fixedly arranged on the eight groups of heating rods (24), and the limiting discs (25) abut against the inner circumference of the preheating roller body (200).

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