A preparation device and preparation method of graphene heat dissipation film

Abstract

The present invention relates to the technical field of film preparation, and in particular to a preparation device and method for a graphene heat dissipation film, comprising: a base plate, and also comprising a surface cooling unit, wherein the surface cooling unit is connected to the upper end of the base plate, and the surface cooling unit comprises a rectangular frame installed on the upper end of the base plate through two support plates, an air inlet cavity is provided in the wall of the rectangular frame, an air inlet pipe connected to the air inlet cavity is installed at the rear end of the rectangular frame, and a plurality of evenly distributed air outlets are provided on the four inner walls of the rectangular frame. The surface cooling unit and the shaping unit used in the present invention cooperate to first cool the surface of the extruded graphene heat dissipation film. At this time, the surface of the graphene heat dissipation film is cooled and the internal temperature is high, so it is easy to be deformed by force and is not easy to stick to the extrusion equipment, thereby ensuring the integrity of the graphene heat dissipation film and avoiding the phenomenon of rebound of the graphene heat dissipation film.

Description

Technical Field

[0001] The present invention relates to the technical field of film preparation, and in particular to a preparation device and a preparation method of a graphene heat dissipation film. Background Art

[0002] Graphene heat dissipation plastic film is a composite material that combines the excellent thermal conductivity of graphene with the light weight and flexibility of plastic. It has the advantages of high thermal conductivity, light weight, good flexibility, good corrosion resistance and good electromagnetic shielding performance. It is widely used in electronic equipment heat dissipation, LED lighting, automotive industry, aerospace and other fields.

[0003] Graphene heat dissipation plastic film is generally obtained by extrusion molding. The steps of the extrusion molding process include: raw material preparation, melt extrusion, cooling and shaping, winding operation, etc., among which cooling and shaping is one of the most important steps.

[0004] In the prior art, when cooling and shaping the extruded graphene heat dissipation plastic film, the extruded plastic film is usually cooled first to quickly reduce the temperature of the plastic film. The plastic film is then guided to one or more groups of cooling rollers for further shaping, and appropriate pressure is applied to ensure that the film is straight and has uniform thickness. When the film reaches the required physical properties, it is neatly wound onto a reel for storage or transportation. However, when the plastic film is cooled, it is easy to stick to the cooling equipment due to the rapid drop in temperature, resulting in missing plastic film. To avoid sticking between the plastic film and the cooling equipment, the plastic film needs to be cooled slowly, which increases the cooling time and reduces the cooling efficiency of the plastic film. In addition, the internal temperature of the cooled plastic film is low, and it is not easy to change its shape. A large pressure needs to be applied, and it is easy to rebound. Summary of the invention

[0005] Based on this, it is necessary to provide a preparation device and method for a graphene heat dissipation film, aiming to solve the problems in the prior art when cooling and shaping the extruded graphene heat dissipation plastic film.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme to achieve: a preparation device of a graphene heat dissipation film, comprising: a base plate, a surface cooling unit, the surface cooling unit is connected to the upper end of the base plate, the surface cooling unit comprises a rectangular frame installed on the upper end of the base plate through two support plates, an air intake cavity is opened in the wall of the rectangular frame, an air intake pipe connected to the air intake cavity is installed at the rear end of the rectangular frame, and a plurality of evenly distributed air outlet holes are opened on the four inner walls of the rectangular frame.

[0007] It also includes a shaping unit, which is connected to the upper end of the base plate. The shaping unit includes a square frame installed on the upper end of the base plate through two support seats and located on the left side of the rectangular frame. The upper and lower frame walls of the square frame are connected with shaping components, and the two shaping components are symmetrically distributed. Rectangular through holes are opened on the front and rear frame walls of the square frame, and an adjustment component is connected in the rectangular through hole located at the rear.

[0008] The shaping component includes a rectangular bar that slides through and is connected to the wall of the square frame. A positioning plate is installed at one end of the rectangular bar located in the square frame. Connecting strips are installed on the left sides of both ends of the positioning plate. A shaping component is hinged between the two connecting strips. A driving component and an angle adjustment component are connected to the shaping component.

[0009] It also includes a cooling unit, which is provided with two cooling units and is symmetrically connected to two adjustment plates. The cooling unit includes a positioning plate connected to the shaping component. A positioning frame with a U-shaped structure is installed at the left end of the positioning plate, and a cooling component is connected to the positioning frame.

[0010] According to an embodiment of the present invention, the cooling unit further comprises a transmission component connected to the middle section of the positioning frame, and a connecting frame is detachably mounted on one end of the positioning plate close to the cooling component via bolts, and a wiping cotton is detachably mounted on the connecting frame.

[0011] According to an embodiment of the present invention, the adjusting component includes a rectangular plate installed in the middle of the rectangular through hole located at the rear, and an adjusting screw in a vertical state is rotatably connected to the middle of the rectangular plate. The surface of the adjusting screw is symmetrically provided with threads, and the adjusting screw is threadedly connected to two lifting plates that are symmetrically distributed up and down and located in the rectangular through hole at the rear, and the lifting plates are fixedly connected to the corresponding adjustment plates.

[0012] According to an embodiment of the present invention, the cooling component includes a cooling roller that passes through the two vertical sections of the positioning frame and is rotatably connected to the two vertical sections of the positioning frame. Ventilation pipes are installed at both front and rear ends of the cooling roller. A limiting frame is installed on the outer surface of the ventilation pipe, and the limiting frame is fixedly connected to the positioning frame.

[0013] According to an embodiment of the present invention, the shaping component includes two strip plates which are symmetrically distributed front and back and are respectively hinged to corresponding connecting strips, a plurality of shaping strips evenly distributed from left to right are installed between the two strip plates, and a transmission roller is arranged between two adjacent shaping strips, and the front and rear ends of the transmission roller both pass through the corresponding strip plates and are rotatably connected thereto.

[0014] According to an embodiment of the present invention, the driving assembly includes a plurality of first pulleys respectively installed at the front end of corresponding transmission rollers, a first belt is connected between two adjacent first pulleys, the front end of any one of the first pulleys is fixedly connected to the output shaft of the driving motor, and the driving motor is fixedly connected to the strip plate located in the front.

[0015] According to an embodiment of the present invention, the angle adjustment assembly includes an arc-shaped plate installed on the strip plate located in the front and close to one end of the corresponding adjustment plate, and the end of the arc-shaped plate away from the corresponding strip plate slides through the corresponding adjustment plate, and the front end of the adjustment plate is threadedly connected with a tightening screw, and the rear end of the tightening screw is in contact with the arc-shaped plate.

[0016] According to an embodiment of the present invention, the transmission component includes a transmission motor installed on the outer wall of the middle section of the positioning frame, a second pulley is installed on the output shaft of the transmission motor, a third pulley is arranged on the side of the second pulley close to the corresponding cooling roller, the third pulley is fixedly connected to the outer surface of the end of the cooling roller, and a second belt is connected between the second pulley and the third pulley.

[0017] According to an embodiment of the present invention, the surface cooling unit further comprises a plurality of wind shielding ropes installed between the upper and lower frame walls of the rectangular frame and close to the rear frame wall of the rectangular frame, and the plurality of wind shielding ropes are evenly distributed from left to right.

[0018] In addition, the present invention also provides a method for preparing a graphene heat dissipation film, which specifically includes the following steps: S1: fixing the base plate at the discharge port of the graphene heat dissipation film, and according to the required thickness of the graphene heat dissipation film, driving two adjustment plates to move through an adjusting component, and the two adjustment plates drive two shaping components to move to the required positions, and then rotating the two shaping components to the required angles and limiting them through two angle adjustment components.

[0019] S2: Connect the air intake pipe to an external air pump, then connect the two cooling components to an external cold air circulation system, and start the air pump and the cold air circulation system.

[0020] S3: Manually clamp one end of the graphene heat dissipation film extruded from the discharge port through an existing clamping device, so that the graphene heat dissipation film passes through the rectangular frame, then passes between two shaping components, and then passes between two cooling components to connect with the existing winding device, and starts the winding device and the driving component.

[0021] S4: The air pump injects external gas into the air inlet cavity and then discharges it to the surface of the graphene heat dissipation film through multiple air outlets. Then, two shaping components shape the surface-cooled graphene heat dissipation film. The shaped graphene heat dissipation film is completely cooled by two cooling components.

[0022] S5: The winding device winds up the cooled graphene heat dissipation film, and the preparation of the graphene heat dissipation film is completed.

[0023] In summary, the present invention includes the following beneficial effects: 1. The surface cooling unit and the shaping unit adopted in the present invention cooperate to first cool the surface of the extruded graphene heat dissipation film, and then the shaping unit shapes the graphene heat dissipation film. At this time, the surface of the graphene heat dissipation film is cooled and the internal temperature is high, so it is easy to be deformed by force and is not easy to stick to the extrusion equipment, thereby avoiding the phenomenon that the graphene heat dissipation film is partially missing due to sticking to the equipment, thereby ensuring the integrity of the graphene heat dissipation film, and the shaping unit can maintain the pressure of the shaped graphene heat dissipation film to avoid the rebound phenomenon of the graphene heat dissipation film.

[0024] 2. The cooling unit used in the present invention can pass cold air at a lower temperature and will not stick to the graphene heat dissipation film, which effectively improves the intensity of cooling the inside of the graphene heat dissipation film, thereby reducing the working length of the graphene heat dissipation film cooling, and then reducing the space required for the cooling process. At the same time, it reduces the time required for cooling the graphene heat dissipation film and improves the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 A schematic diagram of the three-dimensional structure of the present invention from a first viewing angle is shown.

[0027] Figure 2 A schematic diagram of the second viewing angle stereoscopic structure of the present invention is shown.

[0028] Figure 3 A front view of the present invention is shown.

[0029] Figure 4 A left side view of the present invention is shown.

[0030] Figure 5 Shows Figure 3 Sectional view of AA.

[0031] Figure 6 Shows Figure 4 Cross-sectional view of BB.

[0032] Figure 7 The schematic diagram of the structure of some square frames and shaping components of the present invention is shown.

[0033] Figure 8 The schematic diagram of the structure of the cooling unit of the present invention is shown.

[0034] The above drawings include the following reference numerals: 1, bottom plate; 2, surface cooling unit; 21, rectangular frame; 22, air inlet cavity; 23, air inlet pipe; 24, air outlet; 25, windproof rope; 3, shaping unit; 31, square frame; 32, shaping component; 321, rectangular strip; 322, adjustment plate; 323, connecting strip; 324, shaping component; 3241, strip plate; 3242, shaping strip; 3243, transmission roller; 325, driving component; 3251, first pulley; 3252, first belt; 3253, driving Motor; 326, angle adjustment assembly; 3261, arc plate; 3262, tightening screw; 33, rectangular through hole; 34, adjusting component; 341, rectangular plate; 342, adjusting screw; 343, lifting plate; 4, cooling unit; 41, positioning plate; 42, positioning frame; 43, cooling component; 431, cooling roller; 432, ventilation pipe; 433, limiting frame; 44, transmission component; 441, transmission motor; 442, second pulley; 443, third pulley; 444, second belt; 45, connecting frame; 46, wiping cotton. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0036] See also Figure 1-Figure 4 and Figure 6 A preparation device for a graphene heat dissipation film comprises a base plate 1, and the preparation device for the graphene heat dissipation film also comprises a surface cooling unit 2, wherein the surface cooling unit 2 is connected to the upper end of the base plate 1, and the surface cooling unit 2 comprises a rectangular frame 21 installed on the upper end of the base plate 1 through two support plates, and an air intake cavity 22 is opened in the frame wall of the rectangular frame 21, and an air intake pipe 23 connected with the air intake cavity 22 is installed at the rear end of the rectangular frame 21, and a plurality of evenly distributed air outlet holes 24 are opened on the four inner walls of the rectangular frame 21.

[0037] During specific operation, the bottom plate 1 is fixed below the graphene heat dissipation film discharge port before cooling treatment, and the bottom plate 1 drives the rectangular frame 21 to move to the discharge port through two support plates, and then the air inlet pipe 23 is connected to the external air pump.

[0038] See also Figure 1 and Figure 2The graphene heat dissipation film preparation device also includes a shaping unit 3, which is connected to the upper end of the base plate 1. The shaping unit 3 includes a square frame 31 installed on the upper end of the base plate 1 through two support seats and located on the left side of the rectangular frame 21. The upper and lower frame walls of the square frame 31 are connected with shaping components 32, and the two shaping components 32 are symmetrically distributed. Rectangular through holes 33 are opened on the front and rear frame walls of the square frame 31, and an adjusting component 34 is connected in the rectangular through hole 33 located at the rear.

[0039] During specific operation, the bottom plate 1 is fixed while the square frame 31 is driven to move to the discharge port through the two support seats, and the square frame 31 limits the two shaping components 32 .

[0040] See also Figure 1 , Figure 5 , Figure 6 and Figure 7 The shaping component 32 includes a rectangular bar 321 that slides through and is connected to the frame wall of the square frame 31. A positioning plate 322 is installed at one end of the rectangular bar 321 located at the square frame 31. Connecting bars 323 are installed on the left sides of the front and rear ends of the positioning plate 322. A shaping component 324 is hinged between the two connecting bars 323. A driving component 325 and an angle adjustment component 326 are connected to the shaping component 324.

[0041] See also Figure 1 and Figure 5 The adjusting component 34 includes a rectangular plate 341 installed in the middle of the rectangular through hole 33 located at the rear, and a vertical adjusting screw 342 is rotatably connected to the middle of the rectangular plate 341. The surface of the adjusting screw 342 is symmetrically provided with threads. The adjusting screw 342 is threadedly connected to two lifting plates 343 that are symmetrically distributed up and down and located in the rectangular through hole 33 at the rear, and the lifting plates 343 are fixedly connected to the corresponding adjustment plates 322.

[0042] During specific operation, before cooling and molding, the adjusting screw 342 is rotated according to the required thickness of the graphene heat dissipation film. The adjusting screw 342 drives the two lifting plates 343 to move simultaneously through the symmetrical threads. The two lifting plates 343 drive the two adjustment plates 322 to move. The two adjustment plates 322 move on the upper and lower frame walls of the square frame 31 through two rectangular bars 321. The rectangular bars 321 guide the movement of the adjustment plates 322. The two adjustment plates 322 drive the two molding components 324 to move through the connecting bars 323. When the spacing between the two molding components 324 reaches the required spacing, the rotation of the adjusting screw 342 is stopped. At this time, the spacing between the two molding components 324 matches the molding thickness of the heat dissipation film.

[0043] See also Figure 1 , Figure 5 , Figure 6 and Figure 7 The shaping component 324 includes two strip plates 3241 which are symmetrically distributed front to back and are hinged to the corresponding connecting strips 323 respectively. A plurality of shaping strips 3242 which are evenly distributed from left to right are installed between the two strip plates 3241. A transmission roller 3243 is arranged between two adjacent shaping strips 3242. The front and rear ends of the transmission roller 3243 both pass through the corresponding strip plates 3241 and are rotatably connected thereto.

[0044] See also Figure 1 , Figure 5 and Figure 7 The angle adjustment component 326 includes an arc plate 3261 installed on the strip plate 3241 located in the front and close to one end of the corresponding adjustment plate 322. The arc plate 3261 slides through the corresponding adjustment plate 322 away from one end of the corresponding strip plate 3241. The front end of the adjustment plate 322 is threadedly connected with a tightening screw 3262, and the rear end of the tightening screw 3262 is in contact with the arc plate 3261.

[0045] In specific operation, while the positioning plate 322 moves, the positioning plate 322 drives the two strip plates 3241 to move through the two connecting bars 323, and the two strip plates 3241 drive the multiple shaping bars 3242 and the multiple transmission rollers 3243 to move until the multiple shaping bars 3242 and the multiple transmission rollers 3243 move to the desired positions, and then the two strip plates 3241 are rotated, and the two strip plates 3241 drive the multiple shaping bars 3242 and the multiple transmission rollers 3243 to move around the strip plates 3241. The arc plate 3261 rotates at the hinge with the connecting strip 323, and at the same time, the strip plate 3241 located on the front side drives the arc plate 3261 to slide in the adjustment plate 322. When the multiple shaping strips 3242 and the multiple transmission rollers 3243 are rotated to the required angle, the tightening screw 3262 is rotated, and the tightening screw 3262 squeezes the arc plate 3261 to achieve the function of limiting the arc plate 3261, thereby achieving the function of limiting the multiple shaping strips 3242 and the multiple transmission rollers 3243 after adjustment.

[0046] See also Figure 1 and Figure 2 The graphene heat dissipation film preparation device also includes a cooling unit 4, which is provided with two cooling units 4 and is symmetrically connected to two positioning plates 322. The cooling unit 4 includes a positioning plate 41 connected to the shaping component 32. A positioning frame 42 with a U-shaped structure is installed at the left end of the positioning plate 41, and a cooling component 43 is connected to the positioning frame 42.

[0047] See also Figure 1 , Figure 2 and Figure 8The cooling component 43 includes a cooling roller 431 that passes through the two vertical sections of the positioning frame 42 and is rotatably connected to the two vertical sections of the positioning frame 42. Ventilation pipes 432 are installed at both the front and rear ends of the cooling roller 431. A limiting frame 433 is installed on the outer surface of the ventilating pipe 432. The limiting frame 433 is fixedly connected to the positioning frame 42.

[0048] During specific operation, while the two adjustment plates 322 move, the two positioning frames 42 are driven to move by the two positioning plates 41, and the two positioning frames 42 drive the two cooling rollers 431 to move, thereby changing the spacing between the two cooling rollers 431 to match the thickness of the formed heat dissipation film. At this time, the height of the contact position between the two cooling rollers 431 and the heat dissipation film is consistent with the height of the contact position between the upper and lower shaping strips 3242 on the far left and the heat dissipation film. Subsequently, the ventilation pipes 432 at both ends of the cooling rollers 431 are connected to the external cold air circulation system.

[0049] See also Figure 1 , Figure 2 and Figure 6 The cooling unit 4 also includes a transmission component 44 connected to the middle section of the positioning frame 42. The end of the positioning plate 41 close to the cooling component 43 is detachably mounted with a connecting frame 45 through bolts, and a wiping cotton 46 is detachably mounted on the connecting frame 45.

[0050] During specific work, the wiping cotton 46 is installed on the connecting frame 45 before work, and then the connecting frame 45 is installed on the positioning plate 41 through bolts. The connecting frame 45 limits the wiping cotton 46. At this time, the wiping cotton 46 is in close contact with the surface of the cooling roller 431. The wiping cotton 46 can wipe the water droplets generated by condensation on the surface of the cooling roller 431 to prevent the water droplets from falling onto the heat dissipation film and affecting the heat dissipation film.

[0051] See also Figure 1 and Figure 6 The surface cooling unit 2 also includes a plurality of wind shielding ropes 25 installed between the upper and lower frame walls of the rectangular frame 21 and close to the rear frame wall of the rectangular frame 21, and the plurality of wind shielding ropes 25 are evenly distributed from left to right.

[0052] During specific operation, the external air pump is started, and the air pump injects air into the air intake cavity 22 through the air intake pipe 23. The air flow in the air intake cavity 22 is discharged through multiple air outlets 24. The discharged air flow is used to cool the surface of the heat dissipation film. Since the air outlets 24 at multiple positions need to discharge air flow, the intensity of the air flow injected by the air intake pipe 23 is relatively large. Multiple evenly distributed wind-blocking ropes 25 are close to the air intake pipe 23, which effectively block the air flow discharged from the air outlets 24 close to the air intake pipe 23, avoid deformation of the heat dissipation film caused by excessive airflow, and ensure the regularity of the heat dissipation film.

[0053] See also Figure 1 and Figure 7 The driving assembly 325 includes a plurality of first pulleys 3251 respectively installed at the front ends of the corresponding transmission rollers 3243, a first belt 3252 is connected between two adjacent first pulleys 3251, and the front end of any one of the first pulleys 3251 is fixedly connected to the output shaft of the driving motor 3253, and the driving motor 3253 is fixedly connected to the strip plate 3241 located in the front.

[0054] During specific work, the driving motor 3253 is connected to the existing power supply before work. After the position of the transmission roller 3243 is adjusted, the two driving motors 3253 are started. The driving motor 3253 drives the first pulley 3251 to rotate. The multiple first pulleys 3251 rotate simultaneously through the multiple first belts 3252. The multiple first pulleys 3251 drive the multiple transmission rollers 3243 to rotate. The transmission rollers 3243 rotating on the upper and lower sides are used to roll and transmit the heat dissipation film.

[0055] See also Figure 1 , Figure 2 and Figure 8 The transmission component 44 includes a transmission motor 441 installed on the outer wall of the middle section of the positioning frame 42, and a second pulley 442 is installed on the output shaft of the transmission motor 441. A third pulley 443 is provided on the side of the second pulley 442 close to the corresponding cooling roller 431. The third pulley 443 is fixedly connected to the outer surface of the end of the cooling roller 431, and a second belt 444 is connected between the second pulley 442 and the third pulley 443.

[0056] During specific operation, the transmission motor 441 is connected to the existing power supply before work. After the cooling roller 431 is moved to the desired position, the two transmission motors 441 are started. The two transmission motors 441 drive the two cooling rollers 431 to rotate relative to each other. Then the cold air circulation system is started. The cold air circulation system circulates cold air into the cooling roller 431, and the cooling roller 431 quickly cools the heat dissipation film.

[0057] One end of the extruded graphene heat dissipation film is manually clamped by an existing clamping device, so that the graphene heat dissipation film passes through the rectangular frame 21, and the airflow discharged from the multiple air outlets 24 cools the surface of the graphene heat dissipation film without contact. Then, the surface-cooled graphene heat dissipation film passes through multiple shaping strips 3242 and multiple driving rollers 3243 on the upper and lower sides. At this time, the surface of the graphene heat dissipation film is cooled and the internal temperature is high. It is easy to be deformed by force and is not easy to stick to the extrusion equipment, so as to avoid the phenomenon of partial position loss of the graphene heat dissipation film due to sticking to the equipment, thereby ensuring the integrity of the graphene heat dissipation film. Multiple driving rollers 3243 roll and shape the graphene heat dissipation film, and multiple shaping strips 3242 maintain the pressure on the shaped graphene heat dissipation film to avoid the rebound phenomenon of the graphene heat dissipation film. The shaped graphene heat dissipation film passes between the two cooling rollers 431 Passing through and connected with the existing winding equipment, the two rotating cooling rollers 431 contact with the graphene heat dissipation film and drive the graphene heat dissipation film to move, and at the same time, the cold air in the two cooling rollers 431 further cools the inside of the graphene heat dissipation film. At this time, due to the low temperature on the surface of the graphene heat dissipation film, the cold air in the cooling roller 431 can be set to a lower temperature, and the cooling roller 431 with a lower temperature will not stick to the graphene heat dissipation film. The cooling roller 431 with a lower temperature effectively improves the intensity of cooling the inside of the graphene heat dissipation film, and effectively reduces the working length of the graphene heat dissipation film cooling, thereby reducing the space occupied by the cooling process, and at the same time reducing the time required for cooling the graphene heat dissipation film, improving the cooling efficiency, and the winding equipment winds up the graphene heat dissipation film. When the winding equipment winds up all the cooled and shaped graphene heat dissipation film, the work is completed.

[0058] In addition, the present invention also provides a method for preparing a graphene heat dissipation film, which specifically includes the following steps: S1: Fix the base plate 1 at the discharge port of the graphene heat dissipation film, and according to the required thickness of the graphene heat dissipation film, drive the two adjustment plates 322 to move through the adjustment component 34, and the two adjustment plates 322 drive the two shaping components 324 to move to the required positions, and then rotate the two shaping components 324 to the required angles and limit them through two angle adjustment components 326.

[0059] S2: Connect the air inlet pipe 23 to an external air pump, then connect the two cooling components 43 to an external cold air circulation system, and start the air pump and the cold air circulation system.

[0060] S3: Manually clamp one end of the graphene heat dissipation film extruded from the discharge port through an existing clamping device, so that the graphene heat dissipation film passes through the rectangular frame 21, then passes between the two shaping components 324, and then passes between the two cooling components 43 to connect with the existing winding device, and start the winding device and the driving component 325.

[0061] S4: The air pump injects external gas into the air inlet cavity 22 and then discharges it to the surface of the graphene heat dissipation film through multiple air outlet holes 24. Then, two shaping components 324 shape the surface-cooled graphene heat dissipation film. The shaped graphene heat dissipation film is completely cooled by two cooling components 43.

[0062] S5: The winding device winds up the cooled graphene heat dissipation film, and the preparation of the graphene heat dissipation film is completed.

[0063] In the description of the embodiments of the present invention, it should be noted that the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "top", "bottom", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0064] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for preparing a graphene heat dissipation film, comprising a bottom plate, characterized in that: A surface cooling unit is connected to the upper end of the bottom plate, the surface cooling unit comprises a rectangular frame installed on the upper end of the bottom plate through two support plates, an air inlet cavity is opened in the wall of the rectangular frame, an air inlet pipe connected to the air inlet cavity is installed at the rear end of the rectangular frame, and a plurality of evenly distributed air outlet holes are opened on the four inner walls of the rectangular frame; A shaping unit connected to the upper end of the bottom plate, the shaping unit comprising a square frame mounted on the upper end of the bottom plate through two support seats, the upper and lower frame walls of the square frame are connected with shaping components, the two shaping components are symmetrically distributed, the front and rear frame walls of the square frame are provided with rectangular through holes, and the rectangular through holes at the rear are connected with adjusting components; The shaping component comprises a rectangular bar that slides through and is connected to the wall of the square frame, an adjustment plate is installed at one end of the rectangular bar located at the square frame, connecting bars are installed at the left sides of the front and rear ends of the adjustment plate, a shaping component is hinged between the two connecting bars, and a driving component and an angle adjustment component are connected to the shaping component; The cooling unit is provided with two and is symmetrically connected to the two positioning plates, the cooling unit comprises a positioning plate connected to the shaping component, a positioning frame with a U-shaped structure is installed at the left end of the positioning plate, and a cooling component is connected to the positioning frame; The shaping component comprises two strip plates which are symmetrically distributed front and back and are respectively hinged to corresponding connecting strips, a plurality of shaping strips evenly distributed from left to right are installed between the two strip plates, a transmission roller is arranged between two adjacent shaping strips, and the front and rear ends of the transmission roller both penetrate the corresponding strip plates and are rotatably connected thereto; The angle adjustment assembly includes an arc plate installed on the strip plate located in the front and close to one end of the corresponding adjustment plate. The end of the arc plate away from the corresponding strip plate slides through the corresponding adjustment plate. The front end of the adjustment plate is threadedly connected with a tightening screw, and the rear end of the tightening screw contacts the arc plate.

2. The device for preparing a graphene heat dissipation film according to claim 1, characterized in that: The cooling unit also includes a transmission component connected to the middle section of the positioning frame, and a connecting frame is detachably mounted on one end of the positioning plate close to the cooling component through bolts, and a wiping cotton is detachably mounted on the connecting frame.

3. The device for preparing a graphene heat dissipation film according to claim 1, characterized in that: The adjusting component includes a rectangular plate installed in the middle of the rectangular through hole located at the rear, and an adjusting screw in a vertical state is rotatably connected to the middle of the rectangular plate. The surface of the adjusting screw is symmetrically provided with threads, and the adjusting screw is threadedly connected to two lifting plates that are symmetrically distributed up and down and located in the rectangular through hole at the rear, and the lifting plates are fixedly connected to the corresponding adjustment plates.

4. The device for preparing a graphene heat dissipation film according to claim 2, characterized in that: The cooling component includes a cooling roller that passes through the two vertical sections of the positioning frame and is rotatably connected to the two vertical sections of the positioning frame. Ventilation pipes are installed at both the front and rear ends of the cooling roller. A limiting frame is installed on the outer surface of the ventilating pipe, and the limiting frame is fixedly connected to the positioning frame.

5. The device for preparing a graphene heat dissipation film according to claim 4, characterized in that: The driving assembly includes a plurality of first pulleys respectively installed at the front ends of corresponding transmission rollers, a first belt is connected between two adjacent first pulleys, the front end of any one of the first pulleys is fixedly connected to the output shaft of the driving motor, and the driving motor is fixedly connected to the strip plate located in the front.

6. The device for preparing a graphene heat dissipation film according to claim 4, characterized in that: The transmission component includes a transmission motor installed on the outer wall of the middle section of the positioning frame, a second pulley is installed on the output shaft of the transmission motor, a third pulley is arranged on the side of the second pulley close to the corresponding cooling roller, the third pulley is fixedly connected to the outer surface of the end of the cooling roller, and a second belt is connected between the second pulley and the third pulley.

7. The device for preparing a graphene heat dissipation film according to claim 1, characterized in that: The surface cooling unit also includes a plurality of wind shielding ropes installed between the upper and lower frame walls of the rectangular frame and close to the rear frame wall of the rectangular frame, and the plurality of wind shielding ropes are evenly distributed from left to right.

8. A method for preparing a graphene heat dissipation film, based on the device for preparing a graphene heat dissipation film according to claim 1, characterized in that: The specific steps include: S1: Fix the bottom plate at the discharge port of the graphene heat dissipation film, and according to the required thickness of the graphene heat dissipation film, drive the two adjustment plates to move through the adjustment component, and the two adjustment plates drive the two shaping components to move to the required positions, and then rotate the two shaping components to the required angles and limit them through the two angle adjustment components; S2: Connect the air intake pipe to the external air pump, then connect the two cooling components to the external cold air circulation system, and start the air pump and the cold air circulation system; S3: manually clamp one end of the graphene heat dissipation film extruded from the discharge port through an existing clamping device, so that the graphene heat dissipation film passes through the rectangular frame, then passes between two shaping components, and then passes between two cooling components to connect with the existing winding device, and starts the winding device and the driving component; S4: The air pump injects external gas into the air inlet cavity and then discharges it to the surface of the graphene heat dissipation film through multiple air outlet holes, and then two shaping components shape the surface-cooled graphene heat dissipation film, and the shaped graphene heat dissipation film is completely cooled by two cooling components; S5: The winding device winds up the cooled graphene heat dissipation film, and the preparation of the graphene heat dissipation film is completed.

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