Multi-layer graphite film coiled material hot-pressing calendering equipment

Abstract

The utility model relates to the technical field of graphite film processing, and discloses multi-layer graphite film coiled material hot-pressing calendering equipment which comprises a rack, a calendering mechanism is arranged at the upper end of the rack, a heating box is arranged in the direction of the feeding end of the calendering mechanism, and the inlet end of the heating box is connected with an inlet guide roller. A graphite film unwinding mechanism is arranged on one side of the rack and located on one side of the heating box, a graphite film deviation rectifying and winding mechanism is arranged on the other side of the rack and located in the discharging end direction of the calendaring mechanism, and scraping and cleaning mechanisms are connected to the upper portion and the lower portion of the feeding end of the calendaring mechanism correspondingly. According to the utility model, the scraping and cleaning mechanism is arranged, so that adherends on the surface of the calendering roller can be effectively removed, the influence of impurity accumulation on calendering quality and product performance is avoided, and the stability of product quality is improved; the novel scraping cleaning mechanism is reasonable in structural design, and through cooperation of the adjusting screw rod, the butterfly nut, the first spring and other components, the stretching amount of the T-shaped scraping plate can be flexibly adjusted so that the T-shaped scraping plate can make better contact with the fixed roller and the movable roller.

Description

Technical Field

[0001] This utility model belongs to the field of graphite film processing technology, specifically a hot pressing and calendering equipment for multi-layer graphite film rolls. Background Technology

[0002] With the development of AI technology, the computing power and power consumption of smart consumer electronics products such as mobile phones and tablets are constantly increasing, leading to greater demands for heat dissipation. Graphite film materials, with their excellent thermal conductivity, have become widely used in heat dissipation components. The thickness of a single graphite film is generally 12-100um. However, due to the increasing power consumption of AI mobile phones, the thickness of a single film cannot fully meet the high-power application requirements. To address this, multilayer graphite films are being composited to increase the thickness, allowing for the absorption and diffusion of more heat, and potentially replacing some copper heat exchangers and heat pipes. However, with multilayer graphite composites, the thermal resistance between layers is significant, and the more layers there are, the more pronounced the decrease in thermal conductivity.

[0003] To address this issue, a hot-pressing calendering device was developed: 1. Unwinding of graphite film → 2. Heating → 3. Calendering → 4. Correction and winding. After the hot-pressing calendering process of the above device, the flatness and thermal conductivity of the composite multilayer graphite film material are improved.

[0004] During the calendering process, substances adhere to the surface of the calendering rolls. As working time accumulates, these substances can affect the calendering process and product quality. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides a multi-layer graphite film roll hot pressing and calendering equipment, which effectively solves the problems mentioned in the background.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer graphite film roll hot pressing calendering equipment, including a frame, a calendering mechanism at the upper end of the frame, a heating box at the feeding end of the calendering mechanism, an inlet guide roller connected to the inlet end of the heating box, a graphite film unwinding mechanism on one side of the frame and on the side of the heating box, a graphite film correction and winding mechanism on the other side of the frame and at the discharge end of the calendering mechanism, and scraping and cleaning mechanisms connected above and below the feeding end of the calendering mechanism.

[0007] Preferably, the scraping cleaning mechanism includes two symmetrical L-shaped support plates, each with a rotating shaft rotatably connected inside. An L-shaped fixing plate is connected to one side of each of the two rotating shafts, and a U-shaped seat is connected to one side of each of the two L-shaped fixing plates. A top block is bolted to the upper end of each U-shaped seat, and an adjusting screw is threaded through the center of the top block. The lower part of the adjusting screw extends into the U-shaped seat and is rotatably connected to a T-shaped scraper. A first spring is connected inside the U-shaped seat, with its upper end connected to the lower end of the T-shaped scraper and its lower end connected to the lower end of the U-shaped seat.

[0008] Preferably, the adjusting screw is threaded with a wing nut, which abuts against the top block.

[0009] Preferably, both sides of the T-shaped scraper are connected to indicator heads, and one side of the U-shaped seat is connected to a scale.

[0010] Preferably, the outer walls of the two L-shaped support plates are connected to a connecting shaft, and a swing rod is movably sleeved on the outside of the connecting shaft. The outer ends of both sides of the rotating shaft are fixedly sleeved with swing arms by bolts. One end of the swing arm is provided with a waist-shaped groove, which is sleeved on the outside of the swing rod. A second spring is sleeved on the outside of the swing rod. Both ends of the second spring are sleeved with baffles located outside the swing rod. The outer end of the swing rod is threaded with a limit nut.

[0011] Preferably, two suction pipes are symmetrically provided on opposite sides of the two U-shaped seats. The two suction pipes are located on both sides of the T-shaped scraper. Suction ports are opened on opposite sides of the two suction pipes. One end of the two suction pipes is connected to the same Y-shaped pipe, which is used to connect to an external suction device.

[0012] Preferably, the calendering mechanism includes a fixed roller located on the frame, a movable roller located below the fixed roller, and cylinders for adjusting the lifting and lowering of the movable roller on both sides of its lower end. A gear mounting frame is located at the upper end of the frame and on one side of the fixed roller and the movable roller. An upper gear is rotatably connected inside the gear mounting frame, and a lower gear is located below the upper gear. The upper gear and the lower gear are meshed and connected. The mounting shaft of the upper gear is hinged to the mounting shaft of the fixed roller through an upper universal joint, and the mounting shaft of the lower gear is hinged to the mounting shaft of the movable roller through a lower universal joint.

[0013] Preferably, the other end of the mounting shaft of the lower gear is connected to a driven wheel, a motor is installed inside the frame, the output end of the motor is connected to a driving wheel, and the driving wheel and the driven wheel are connected by a transmission belt.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model, by setting up a scraping and cleaning mechanism, can effectively remove the adhering substances on the surface of the calendering roll, avoid the accumulation of impurities affecting the calendering quality and product performance, and improve the stability of product quality;

[0016] 2. The new scraping cleaning mechanism has a reasonable structural design. By adjusting the screw, wing nut, first spring and other components, the extension and retraction of the T-shaped scraper can be flexibly adjusted so that the T-shaped scraper can better contact the fixed roller and the moving roller.

[0017] 3. This new type of equipment, through the dust collection pipes set on both sides of the T-shaped pipe and the cooperation of the external dust collection equipment connected to the Y-shaped pipe, can promptly remove scraped impurities, keep the equipment clean, further improve product quality, and also facilitate equipment maintenance. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0022] Figure 3 This is a schematic diagram of the calendering mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the scraping and cleaning mechanism of this utility model;

[0024] Figure 5 This is a schematic diagram of the telescopic adjustment structure of the T-shaped scraper of this utility model;

[0025] Figure 6 This is a partially enlarged structural diagram of the scraping and cleaning mechanism of this utility model;

[0026] Figure 7 This is a schematic diagram of the connection structure of the Y-shaped pipe of this utility model;

[0027] In the diagram: 1. Frame; 2. Calendering mechanism; 201. Fixed roller; 202. Movable roller; 203. Cylinder; 204. Gear mounting bracket; 205. Upper gear; 206. Lower gear; 207. Upper universal coupling; 208. Lower universal coupling; 209. Driven wheel; 210. Motor; 211. Driving wheel; 212. Drive belt; 3. Heating box; 4. Inlet guide roller; 5. Graphite film unwinding mechanism; 6. Graphite film correction and rewinding mechanism; 7. Scraping and cleaning mechanism; 70 1. L-shaped support plate; 702. Rotating shaft; 703. L-shaped fixing plate; 704. U-shaped seat; 705. Top block; 706. Adjusting screw; 707. T-shaped scraper; 708. First spring; 709. Butterfly nut; 710. Indicator head; 711. Scale; 712. Connecting shaft; 713. Swing rod; 714. Swing arm; 715. Waist-shaped groove; 716. Second spring; 717. Baffle plate; 718. Limit nut; 719. Dust suction pipe; 720. Y-shaped pipe. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] Example 1, by Figures 1-7 The present invention includes a frame 1, a calendering mechanism 2 at the upper end of the frame 1, a heating box 3 at the feed end of the calendering mechanism 2, an inlet guide roller 4 connected to the inlet end of the heating box 3, a graphite film unwinding mechanism 5 on one side of the frame 1 and on the side of the heating box 3, a graphite film correction and winding mechanism 6 on the other side of the frame 1 and at the discharge end of the calendering mechanism 2, and scraping and cleaning mechanisms 7 connected above and below the feed end of the calendering mechanism 2.

[0030] The scraping cleaning mechanism 7 includes two symmetrical L-shaped support plates 701. A rotating shaft 702 is rotatably connected through the interior of each L-shaped support plate 701. An L-shaped fixing plate 703 is connected to the opposite side of each of the two rotating shafts 702. A U-shaped seat 704 is connected to one side of each of the two L-shaped fixing plates 703. A top block 705 is bolted to the upper end of each U-shaped seat 704. An adjusting screw 706 is threaded through the center of the top block 705. The lower part of the adjusting screw 706 extends into the interior of the U-shaped seat 704 and is rotatably connected to a T-shaped scraper 707. A first spring 708 is connected inside the U-shaped seat 704. The upper end of the first spring 708 is connected to the lower end of the T-shaped scraper 707, and the lower end of the first spring 708 is connected to the lower end of the interior of the U-shaped seat 704.

[0031] The adjusting screw 706 is threaded with a wing nut 709, which abuts against the top block 705.

[0032] Indicator heads 710 are connected to both sides of the T-shaped scraper 707, and a scale 711 is connected to one side of the U-shaped seat 704.

[0033] The outer walls of the two L-shaped support plates 701 are connected to the connecting shafts 712. The connecting shafts 712 are movably sleeved with the rocker arm 713. The outer ends of the two sides of the rotating shaft 702 are fixedly sleeved with the rocker arm 714 by bolts. One end of the rocker arm 714 is provided with a waist-shaped groove 715. The waist-shaped groove 715 is sleeved on the outside of the rocker arm 713. The rocker arm 713 is sleeved with a second spring 716. The two ends of the second spring 716 and the rocker arm 713 are sleeved with baffles 717. The outer end of the rocker arm 713 is threaded with a limit nut 718.

[0034] When the T-shaped scraper 707 scrapes away impurities, if the impurities are squeezed and adhered by the fixed roller 201 and the movable roller 202 and are difficult to scrape off, the T-shaped scraper 707 is subjected to the force of the impurities, causing the T-shaped scraper 707 to generate an outward jumping wave force. At this time, the rotating shaft 702 drives the swing arm 714 to swing, the swing arm 714 squeezes the second spring 716, and then the second spring 716 returns to its original position, causing the T-shaped scraper 707 to return to its original position and continue to be in contact with the surfaces of the fixed roller 201 and the movable roller 202. This elastic contact force allows the T-shaped scraper 707 to scrape away impurities better, while reducing the damage caused by hard contact.

[0035] Two suction pipes 719 are symmetrically arranged on opposite sides of the two U-shaped seats 704. The two suction pipes 719 are located on both sides of the T-shaped scraper 707. Suction ports are opened on opposite sides of the two suction pipes 719. One end of the two suction pipes 719 is connected to the same Y-shaped pipe 720. The Y-shaped pipe 720 is used to connect external suction equipment.

[0036] By providing suction pipes 719 on both sides of the T-shaped scraper 707, impurities adhering to the surfaces of the fixed roller 201 and the movable roller 202 can be better absorbed.

[0037] The calendering mechanism 2 includes a fixed roller 201 located on the frame 1, a movable roller 202 located below the fixed roller 201, and cylinders 203 for adjusting its lifting and lowering on both sides of the lower end of the movable roller 202. A gear mounting frame 204 is located at the upper end of the frame 1 and on one side of the fixed roller 201 and the movable roller 202. An upper gear 205 is rotatably connected inside the gear mounting frame 204, and a lower gear 206 is located below the upper gear 205. The upper gear 205 and the lower gear 206 are meshed and connected. The mounting shaft of the upper gear 205 is hinged to the mounting shaft of the fixed roller 201 through an upper universal coupling 207, and the mounting shaft of the lower gear 206 is hinged to the mounting shaft of the movable roller 202 through a lower universal coupling 208.

[0038] The other end of the mounting shaft of the lower gear 206 is connected to the driven wheel 209. The motor 210 is installed inside the frame 1. The output end of the motor 210 is connected to the driving wheel 211. The driving wheel 211 and the driven wheel 209 are connected by a transmission belt 212.

[0039] Working principle:

[0040] The graphite film roll is released from the graphite film unwinding mechanism 5 and guided into the heating box 3 by the inlet guide roller 4. After the graphite film enters the heating box 3, the heating element (not shown) inside the heating box 3 preheats the graphite film. The purpose of preheating is to bring the graphite film to a suitable temperature, reduce its brittleness in the subsequent calendering process, and at the same time improve its flexibility and extensibility.

[0041] The preheated graphite film enters the calendering mechanism 2, which consists of components such as a fixed roller 201 and a movable roller 202. The movable roller 202 is adjusted in height by a cylinder 203 to accommodate graphite film rolls of different thicknesses. The motor 210 drives the transmission belt 212 through the drive wheel 211 and the driven wheel 209, which in turn drives the lower gear 206 and the upper gear 205 to rotate. Through the transmission of the upper universal coupling 207 and the lower universal coupling 208, the fixed roller 201 and the movable roller 202 are finally rotated synchronously. The graphite film passes between the fixed roller 201 and the movable roller 202 and is subjected to pressure to achieve hot pressing and calendering of the multilayer graphite film, thereby improving its flatness and thermal conductivity.

[0042] During the calendering process, impurities may adhere to the surface of the calendering rolls, affecting the calendering effect and product quality. To address this, scraping and cleaning mechanisms 7 are provided above and below the feed end of the calendering mechanism 2. The T-shaped scraper 707 adjusts its extension and retraction by adjusting the screw 706 and the wing nut 709. The first spring 708 provides elastic support to ensure that the T-shaped scraper 707 is in close contact with the surfaces of the fixed roll 201 and the movable roll 202. The scraped impurities are sucked away by the external dust collection equipment through the dust collection pipe 719 and the Y-shaped pipe 720, keeping the surface of the calendering rolls clean.

[0043] The calendered graphite film enters the graphite film correction and winding mechanism 6, which neatly winds the treated graphite film roll into a roll, ensuring that the graphite film remains flat during the winding process, thus completing the entire calendering process.

[0044] This hot pressing and calendering equipment heats and presses multilayer graphite films to improve their thermal conductivity. However, conventional multilayer graphite films have significantly increased interlayer thermal resistance, resulting in a significant decrease in thermal conductivity after multilayering.

[0045] Multilayer graphite film rolls are made of multiple single-layer graphite films bonded together with a high-temperature resistant pressure-sensitive adhesive without a substrate, which is slightly thicker at this point. The product is heated evenly in a heated tunnel through a hot pressing device, and then pressed into the required thickness by pressure rollers before the heat dissipates. After the product is heated evenly and pressed simultaneously, the interlayer adhesive layer and graphite are more tightly embedded, the overall flatness of the graphite film is better, the interlayer thermal resistance of the graphite film is reduced, and the thermal conductivity of the product is significantly improved.

Claims

1. A multilayer graphite film roll hot pressing and calendering equipment, comprising a frame (1), characterized in that: The upper end of the frame (1) is provided with a calendering mechanism (2), and a heating box (3) is provided in the direction of the feeding end of the calendering mechanism (2). An inlet guide roller (4) is connected to the inlet end of the heating box (3). A graphite film unwinding mechanism (5) is provided on one side of the frame (1) and on the side of the heating box (3). A graphite film correction and winding mechanism (6) is provided on the other side of the frame (1) and in the direction of the discharge end of the calendering mechanism (2). A scraping and cleaning mechanism (7) is connected above and below the feeding end of the calendering mechanism (2).

2. The multilayer graphite film roll hot pressing and calendering equipment according to claim 1, characterized in that: The scraping cleaning mechanism (7) includes two symmetrical L-shaped support plates (701). A rotating shaft (702) is rotatably connected through the interior of each L-shaped support plate (701). An L-shaped fixing plate (703) is connected to the opposite side of each of the two rotating shafts (702). A U-shaped seat (704) is connected to one side of each of the two L-shaped fixing plates (703). A top block (705) is bolted to the upper end of each U-shaped seat (704). An adjusting screw (706) is threaded through the center of the top block (705). A T-shaped scraper (707) is rotatably connected to the lower part of the adjusting screw (706) inside the U-shaped seat (704). A first spring (708) is connected inside the U-shaped seat (704). The upper end of the first spring (708) is connected to the lower end of the T-shaped scraper (707), and the lower end of the first spring (708) is connected to the lower end of the interior of the U-shaped seat (704).

3. The multilayer graphite film roll hot pressing and calendering equipment according to claim 2, characterized in that: The adjusting screw (706) is threaded with a wing nut (709), which abuts against the top block (705).

4. The multilayer graphite film roll hot pressing and calendering equipment according to claim 2, characterized in that: The T-shaped scraper (707) has an indicator head (710) connected to both sides, and the U-shaped seat (704) has a scale (711) connected to one side.

5. The multilayer graphite film roll hot pressing and calendering equipment according to claim 2, characterized in that: The outer walls of the two L-shaped support plates (701) are connected to a connecting shaft (712). A rocker arm (713) is movably sleeved on the outside of the connecting shaft (712). Both outer ends of the rotating shaft (702) are fixedly sleeved with rocker arms (714) by bolts. One end of the rocker arm (714) is provided with a waist-shaped groove (715). The waist-shaped groove (715) is sleeved on the outside of the rocker arm (713). A second spring (716) is sleeved on the outside of the rocker arm (713). Both ends of the second spring (716) and located outside the rocker arm (713) are sleeved with baffles (717). The outer end of the rocker arm (713) is threaded with a limit nut (718).

6. The multilayer graphite film roll hot pressing and calendering equipment according to claim 2, characterized in that: Two suction pipes (719) are symmetrically provided on opposite sides of the two U-shaped seats (704). The two suction pipes (719) are located on both sides of the T-shaped scraper (707). Suction ports are opened on opposite sides of the two suction pipes (719). One end of the two suction pipes (719) is connected to the same Y-shaped pipe (720). The Y-shaped pipe (720) is used to connect external suction equipment.

7. The multilayer graphite film roll hot pressing and calendering equipment according to claim 1, characterized in that: The calendering mechanism (2) includes a fixed roller (201) located on the frame (1), a movable roller (202) located below the fixed roller (201), and cylinders (203) for adjusting its lifting and lowering on both sides of the lower end of the movable roller (202). A gear mounting frame (204) is located at the upper end of the frame (1) and on one side of the fixed roller (201) and the movable roller (202). An upper gear (205) is rotatably connected inside the gear mounting frame (204). A lower gear (206) is located below the upper gear (205). The upper gear (205) and the lower gear (206) are meshed. The mounting shaft of the upper gear (205) is hinged to the mounting shaft of the fixed roller (201) through an upper universal coupling (207). The mounting shaft of the lower gear (206) is hinged to the mounting shaft of the movable roller (202) through a lower universal coupling (208).

8. The multilayer graphite film roll hot pressing and calendering equipment according to claim 7, characterized in that: The other end of the mounting shaft of the lower gear (206) is connected to the driven wheel (209). A motor (210) is installed inside the frame (1). The output end of the motor (210) is connected to the driving wheel (211). The driving wheel (211) and the driven wheel (209) are connected by a transmission belt (212).

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