Hot press with graphene heater

Abstract

The utility model belongs to the technical field of hot presses, and particularly relates to a hot press with a graphene heater, and the graphene heater is arranged on the hot press. The graphene heater comprises a combination part and a pressure bearing part. The combination part sequentially comprises a heat transfer layer, an insulating layer, a graphene heating layer, an insulating layer, a heat insulation layer and a protective cover plate. The pressure-bearing part is arranged in the combination part, the pressure-bearing part is arranged between the heat transfer layer of the combination part and the peripheral edge of the protective cover plate, and the heat transfer layer, the protective cover plate and the pressure-bearing part are internally provided with an insulating layer, a graphene heating layer and a heat insulation layer; the graphene heating layer is connected with a wire which passes through the pressure-bearing part and is connected with a control system. The hot press is simple in structure, high in heat utilization rate, instantaneous in power generation, low in energy consumption, safe, energy-saving and environment-friendly.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot presses, and in particular relates to a hot press with a graphene heater. Background Art

[0002] At present, the structural forms of hot presses are diverse, but their basic structure and working principle are roughly the same: they mainly consist of hot press plates and oil cylinders. The oil cylinder controls the movement of one hot press plate toward the other to achieve pressurization. A heating channel is opened in the hot press plate, and heat is usually provided to the hot press plate by thermal oil, resistance wire, heating tube, etc. However, the above-mentioned heat supply methods all have major disadvantages.

[0003] The heat source for the hot press is mainly provided by natural gas, which heats the heat transfer oil (medium) in the boiler (mold temperature controller) and is then pressurized by a circulating pump and transported to the hot press plate through a pipeline, so that the hot press plate reaches the necessary working temperature. However, my country relies on large-scale imports of natural gas, which produces a large amount of CO2 and NO when burned. S Harmful gases such as argon, argon, and coke are emitted, and the boiler (mold temperature controller) furnace body, exhaust port, circulation pump, pipeline, valve, etc. cause large heat loss, and the thermal energy utilization rate is about 45%. At the same time, a large number of safety accidents are related to it. Laboratories or small batch production often use resistance wires, heating tubes, etc. to heat the pressing plate, which are easy to oxidize and have a short service life. During use, problems are prone to occur, delaying production and increasing costs. In addition, the thermoelectric conversion rate is relatively low and the heating speed is slow. This has also resulted in the use of resistance wires and heating tubes for heating hot pressing plates being extremely rare in this field, which is not conducive to industrial production applications. Utility Model Content

[0004] In response to the current technical problems, the utility model provides a hot press with a graphene heater. The hot press adopts a graphene heater to replace the traditional heating method, which can fundamentally solve the current status of high energy consumption, high safety risks and high pollution of traditional hot presses. The hot press provides a heat device with a simple structure, high heat utilization rate, instantaneous power generation, low energy consumption, safety, energy saving and environmental protection, and is conducive to industrial production and application.

[0005] The technical solution of the utility model is as follows:

[0006] A hot press with a graphene heater is provided on the hot press; the graphene heater includes a combination part and a pressure-bearing part, the combination part includes a heat transfer layer, an insulating layer, a graphene heating layer, an insulating layer, a heat-insulating layer, and a protective cover in sequence; the pressure-bearing part is arranged in the combination part, the pressure-bearing part is arranged between the heat transfer layer of the combination part and the edges of the protective cover, and the heat transfer layer, the protective cover and the interior of the pressure-bearing part are provided with an insulating layer, a graphene heating layer and a heat-insulating layer; the graphene heating layer is connected to a wire, and the wire passes through the pressure-bearing part to connect to a control system.

[0007] Preferably, the outer side surface of the pressure-bearing portion is flush with the outer side surfaces of the heat transfer layer and the protective cover plate.

[0008] Preferably, the graphene heater is connected to a hot pressing plate on a hot press. Further preferably, the graphene heater is connected to the hot press via screws, wherein a protective cover of the graphene heater contacts the hot pressing plate.

[0009] Preferably, a pressure strip is provided between the heat transfer layer and the insulating layer on the combined portion. The pressure strip is connected to the pressure portion by snapping and gluing. The surface of the pressure strip is flush with the surface of the pressure portion. Multiple pressure strips can be provided, evenly distributed laterally, and the pressure strips can be in contact or have gaps between them. The function of the pressure strip is to protect the graphene heating layer.

[0010] Preferably, the combination part is connected to the pressure-bearing part by screws, which pass through the protective cover, the pressure-bearing part and the heat transfer layer to connect the combination part and the pressure-bearing part.

[0011] Preferably, a temperature measuring element is provided on the graphene heating layer, connected to a wire that passes through the pressure-bearing portion and connects to a control system. The temperature measuring element primarily monitors the temperature in real time, ensuring proper operation of the heater and effectively preventing safety incidents. Further preferably, through-holes are provided at either or both ends of the pressure-bearing portion, through which wires can pass to connect to the control system.

[0012] Further preferably, an insulating layer is provided between the pressure-bearing part and the graphene heating layer, and the wires connected to the graphene heating layer and the wires connected to the temperature measuring element pass through the insulating layer, and the pressure-bearing part is connected to the control system.

[0013] Preferably, the pressure-bearing part is composed of four sub-pressure-bearing parts, and the sub-pressure-bearing parts are connected to each other by snap-fitting.

[0014] Preferably, the heat transfer layer is made of stainless steel, manganese steel or aluminum alloy material with a thickness of ≥3mm; the pressure strip is made of high-hardness metal material with a thickness of ≥3mm, and the pressure-bearing part is made of high-hardness metal material; the thermal insulation layer is made of polymer material with a thickness of ≥3mm, and the protective cover is made of stainless steel, manganese steel or aluminum alloy material with a thickness of ≥1mm.

[0015] Preferably, the insulating layer is made of insulating glue with a density of 100 to 300 g / m 2 set up.

[0016] Preferably, the graphene heating layer is composed of graphene crystals or graphene filaments, with a density of 100 to 300 g / m 2 set up.

[0017] Preferably, the total thickness of the graphene heater is ≤15 mm. The total thickness is controlled to ensure that the graphene heater has good performance and is easy to install on the hot press plate.

[0018] Preferably, both ends of the graphene heating layer are connected to terminals, and the terminals are connected to the wires and the graphene heating layer.

[0019] Preferably, gaps between the combined parts, between the pressure-bearing part and the combined parts, and between the pressure-bearing part and the wires are sealed with sealant to ensure the sealing, stability and safety of the structure.

[0020] Preferably, the control system adopts a PLC control system, the specific equipment is a control cabinet, and the control system is electrically connected to the alarm device. First, a suitable temperature is set in the control system, and the temperature measuring element transmits the monitored temperature to the control system. If the system detects that the temperature has not reached the preset temperature, the control system controls the switch to open and starts to energize the graphene heating layer. When the temperature reaches the set temperature, the temperature measuring element transmits the monitored temperature to the control system. If the system detects that the temperature has reached the preset temperature, the control system controls the switch to close and stops energizing the graphene heating layer. The temperature measuring element transmits the monitored temperature to the control system. If the temperature is too high or too low for a long time and exceeds a certain limit, the control system will control the alarm device to send an alarm signal, which can effectively verify whether the monitoring device is operating normally and effectively prevent the occurrence of safety accidents.

[0021] Graphene heating materials have excellent thermal conductivity. At room temperature, graphene's charge carrier (conductive ion) mobility is 15,000 cm / (V·s), ten times higher than that of silicon and more than twice that of indium antimonide (nSb), the material with the highest known charge carrier mobility. Graphene heating requires electricity. When current is applied to the electrodes at both ends of the graphene heating layer, the carbon molecules in the heating layer generate phonons, ions, and electrons in the resistor. The resulting carbon clusters rub and collide with each other, generating heat energy, also known as Brownian motion. The heat energy generated by these collisions is then uniformly radiated in a planar manner through far-infrared light with a wavelength of 5-14 microns. The graphene material's total effective electrothermal energy conversion rate exceeds 99.5%, and its superconductivity ensures stable heating performance. In the present invention, electrical energy is converted into thermal energy through the instantaneous heating characteristics of the graphene heating layer, avoiding the problems of high energy consumption, high risk, low heat conversion efficiency, high cost, and environmental pollution in traditional heat-providing methods such as thermal oil. It also avoids the problems of short service life, easy failure, slow heating, low heat conversion efficiency, and high cost in traditional heat-providing methods such as resistance wire and heating tube.

[0022] The utility model provides a hot press with a graphene heater, which uses a graphene heater to replace the traditional heating method, avoiding the generation of CO, CO2, NOS It can eliminate harmful gases such as argon, argon and tungsten and avoid environmental pollution; it uses graphene materials to generate electricity for heating, which improves the utilization rate of thermal energy, and the comprehensive thermal energy utilization rate reaches more than 85%; it uses graphene heaters, which can generate heat instantly, effectively improving work efficiency and increasing production capacity; it does not require full-time technicians to maintain the boiler, and does not require regular replacement and replenishment of heat transfer oil, which improves efficiency and saves manpower and material resources; especially in recent years, the country has vigorously developed green electricity, electricity prices have dropped, and natural gas prices have risen every year. The use of the hot press of this utility model can save more than 35% of costs; since boilers, pressure pipes and natural gas are not used, safety hazards are eliminated and the risk factor is reduced; compared with traditional The heat supply method of thermal oil, resistance wire and heating tube increases the heating speed, improves the heat conversion efficiency, reduces costs, increases the service life, improves production efficiency, avoids the occurrence of safety accidents, and improves the safety factor; the graphene heater can be directly connected to the hot pressing plate of the hot press, without the need to modify the original equipment or special technology; the graphene heater can be manufactured in different specifications (such as 4×8 feet, 4×9 feet, 5×8 feet) according to needs, which is suitable for new equipment and suitable for the modification of old equipment; the graphene heater used in the hot press has undergone 3000 hours of continuous testing, and the equipment operates normally and has a long service life.

[0023] The utility model provides a hot press with a graphene heater, which has a simple structure, is easy to install, has high thermal utilization and low energy consumption, is safe, energy-saving and environmentally friendly, generates heat instantly, effectively improves production efficiency and capacity, and has a long service life. It can fundamentally solve the current situation of high energy consumption, high safety risks and high pollution in the heat supply method of traditional hot presses, and is suitable for industrial production and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 It is a structural diagram of the pressure-bearing part;

[0026] Figure 3 It is a structural diagram of the combined part;

[0027] Figure 4 It is a schematic diagram of a structure with a pressure-bearing strip in the combined part;

[0028] Figure 5 Schematic diagram of the structure of the graphene heater and the hot pressing plate;

[0029] In the figure, 1 is the heat transfer layer, 2 is the insulation layer, 2-1 is the insulation layer A, 2-2 is the insulation layer B, 2-3 is the insulation layer C, 3 is the graphene heating layer, 4 is the heat insulation layer, 5 is the protective cover, 6 is the pressure bar, 7 is the pressure part, 8 is the through hole, 9 is the wire groove, 10 is the hot press, 11 is the hot pressing plate, and 12 is the graphene heater. DETAILED DESCRIPTION

[0030] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0031] like Figure 1-3 As shown, a hot press 10 having a graphene heater 12 is provided on the hot press 10. The graphene heater 12 includes a combination portion and a pressure-bearing portion 7. The combination portion sequentially includes a heat transfer layer 1, an insulating layer 2, a graphene heating layer 3, an insulating layer 2, a heat-insulating layer 4, and a protective cover plate 5. The pressure-bearing portion 7 is disposed within the combination portion. The pressure-bearing portion 7 is disposed between the edges of the heat transfer layer 1 and the protective cover plate 5 of the combination portion. The outer side of the pressure-bearing portion 7 is flush with the outer sides of the heat transfer layer 1 and the protective cover plate 5. The heat transfer layer 1, the protective cover plate 5, and the pressure-bearing portion 7 are internally provided with an insulating layer 2, a graphene heating layer 3, and a heat-insulating layer 4. The graphene heating layer 3 is connected to a wire, which passes through the pressure-bearing portion 7 to connect to a control system. The combination portion and the pressure-bearing portion 7 are connected by screws, which pass through the protective cover plate 5, the pressure-bearing portion 7, and the heat transfer layer 1 to connect the combination portion and the pressure-bearing portion 7. Other commonly used methods in the prior art can also be used for connection.

[0032] In another embodiment, a temperature measuring element is provided on the graphene heating layer 3, connected to a wire that passes through the pressure-bearing portion 7 to connect to a control system. The temperature measuring element is primarily used to monitor the temperature in real time, ensuring the proper functioning of the heater and effectively preventing safety accidents. Through holes 8 are provided at either or both ends of the pressure-bearing portion 7, through which the wires connected to the graphene heating layer 3 and the temperature measuring element can pass to connect to the control system.

[0033] In another embodiment, an insulating layer 2 (not shown in the figure) is provided between the pressure-bearing part 7 and the graphene heating layer 3, that is, the graphene heating layer 3 is surrounded by the insulating layer 2, and the wires connected to the graphene heating layer 3 and the wires connected to the temperature measuring element can pass through the insulating layer 2 and the pressure-bearing part 7 (through the through hole 8) to connect to the control system.

[0034] In another embodiment, the bottom or top of the hot pressing plate 11 of the hot press 10 is connected to the graphene heater 12, such as Figure 5As shown, screws can be used for connection, and the screws pass through the hot pressing plate 11 and are connected to the graphene heater 12. The position of the screws is at the position corresponding to the pressure-bearing part 7, and the protective cover 5 contacts the hot pressing plate. Other methods of existing technology can also be used to connect the hot pressing plate 11 and the graphene heater 12.

[0035] Another embodiment, such as Figure 4 As shown, a pressure strip 6 is arranged between the heat transfer layer 1 and the insulating layer 2 on the combined part. The pressure strip 6 is snap-connected to the pressure-bearing part 7 and glued together. The surface of the pressure strip 6 close to the heat transfer layer 1 is flush with the surface of the pressure-bearing part 7 close to the heat transfer layer 1. Multiple pressure strips 6 can be arranged and evenly distributed laterally. The pressure strips 6 can be in contact with each other or there can be gaps between them. The function of the pressure strip 6 is to protect the graphene heating layer 3.

[0036] In another embodiment, a through hole 8 is provided only at one end of the pressure-bearing portion 7, and a wire groove 9 is provided on the inner side of the pressure-bearing portion 7, and the wire groove 9 is connected to the through hole 8, as shown in FIG. Figure 2 Because both ends of the graphene heating layer 3 need to be connected to wires, the wires connected to the graphene heating layer 3 at the end away from the through hole 8 and the wires connected to the temperature measuring element pass through the wire groove 9 and through the through hole 8 to connect to the control system. In actual use, this also makes the wire connection safer, more beautiful, and easier to fix in place.

[0037] In another embodiment, the pressure-bearing portion 7 is composed of four sub-pressure-bearing portions, which are connected by snap-fitting. Wire grooves 9 are provided on the inner sides of the four sub-pressure-bearing portions, and a through hole 8 is provided on one of the sub-pressure-bearing portions, which is connected to the wire groove 9.

[0038] In another embodiment, the heat transfer layer 1 is made of stainless steel, manganese steel or aluminum alloy with a thickness of ≥3mm; the pressure strip 6 is made of high hardness metal material, such as 201 stainless steel or manganese steel with a thickness of ≥3mm; the pressure bearing portion 7 is made of high hardness metal material, such as 201 stainless steel or manganese steel; the heat insulation layer 4 is made of polymer material, such as polystyrene board or tetrafluoroethylene board with a thickness of ≥3mm; the protective cover 5 is made of stainless steel, manganese steel or aluminum alloy with a thickness of ≥1mm; the insulating layer 2 is made of insulating glue with a viscosity of 100 to 300g / m 2 Setting; The graphene heating layer 3 is composed of graphene crystals or graphene filaments, with a density of 100 to 300 g / m 2 The total thickness of the graphene heater 12 is set to ≤ 15 mm. This total thickness is controlled to ensure both good performance of the graphene heater 12 and ease of installation on the press plate. This also ensures the implementation of the veneer panel processing technology. During the veneer panel processing technology, the graphene heater on the hot press can be limited to a width of 5 mm ≤ the pressure portion ≤ 30 mm.

[0039] In another embodiment, both ends of the graphene heating layer 3 are connected to terminals with a diameter of ≥3 mm. The terminals connect the wires and the graphene heating layer 3 . The terminals are designed mainly to facilitate the connection of the wires.

[0040] In another embodiment, the control system adopts a PLC control system, the specific equipment is a control cabinet, and the control system is electrically connected to the alarm device. First, a suitable temperature is set in the control system, and the temperature measuring element transmits the monitored temperature to the control system. If the system detects that the temperature has not reached the preset temperature, the control system controls the switch to open and starts to energize the graphene heating layer 3. When the temperature reaches the set temperature, the temperature measuring element transmits the monitored temperature to the control system. If the system detects that the temperature has reached the preset temperature, the control system controls the switch to close and stops energizing the graphene heating layer 3. The temperature measuring element transmits the monitored temperature to the control system. If the temperature is too high or too low for a long time and exceeds a certain limit, the control system will control the alarm device to send an alarm signal, which can effectively verify whether the monitoring device is operating normally and effectively prevent the occurrence of safety accidents.

[0041] In the present invention, gaps between the combined parts, between the pressure-bearing part 7 and the combined parts, and between the pressure-bearing part and the wires are sealed with sealant to ensure the sealing, stability and safety of the structure.

[0042] In another embodiment, the heat transfer layer 1 of the graphene heater 12 is selected to be a 201 stainless steel plate with a thickness of 5 mm; the thickness is selected to be 5 mm, and the pressure bearing strength is 80 kg / cm 2 High-hardness 201 stainless steel is laid horizontally on the heat transfer layer 1. Four pressure strips 6 can be set and evenly distributed. The pressure strips 6 and the heat transfer layer 1 are connected by gluing. The insulation layer A (2-1) is an insulating glue with a resistance of 1MΩ / kV, high temperature resistance above 300℃, and a thickness of 150g / m 2 Use roller coating to evenly coat the surface of the pressure strip 6 and the heat transfer layer 1. The particle size of the graphene heating layer 3 is ≤2 microns. The graphene crystals with a purity of 99% are evenly coated on the insulating layer A (2-1) by roller coating. Three thermocouples (temperature sensors, i.e. temperature measuring elements) are set and installed in three temperature zones of the graphene heating layer 3 respectively; the insulating layer B (2-2) is an insulating glue with a resistance of 1MΩ / kV, high temperature resistance above 300℃, and a thickness of 150g / m 2It is evenly coated on the surface of the graphene heating layer 3 by roller coating; the heat insulation layer 4 is a polymer material (polystyrene board) with a thickness of 4mm and a thermal conductivity coefficient of ≤0.2 (w / mk), covering the insulating layer B (2-2); the protective cover plate 5 (stainless steel) is 1.5mm thick, covering the heat insulation layer 4, and the protective cover plate 5 and the heat insulation layer 4 are connected by adhesive; sub-pressure parts (201 stainless steel) are set at the edges of the pressure strip 6, the insulating layer 2, the graphene heating layer 3, and the heat insulation layer 4, and the sub-pressure parts are snap-connected to form a pressure part 7, the upper and lower surfaces of the pressure part 7 are in contact with the heat transfer layer 1 and the protective cover plate 5 respectively, the outer side surface of the pressure part 7 is flush with the outer side surface of the heat transfer layer 1 and the protective cover plate 5, and through holes 8 are set at both ends of the pressure part 7; an insulating layer C is also provided between the graphene heating layer 3 and the pressure part 7. 2-3, the insulating glue used is the same as that of the insulating layer A2-1, and the wires connected to the graphene heating layer 3 and the wires connected to the temperature measuring element can all pass through the insulating layer 2 and the pressure-bearing part 7 (through the through hole 8) to connect to the control system; 201 high-strength screws pass through the protective cover 5, the pressure-bearing part 7 and the heat transfer layer 1 to fix them; both ends of the graphene heating layer 3 are connected to the terminal posts with a diameter of 3mm, the terminal posts are connected to the wires, and the wires pass through the insulating layer C 2-3 and the through hole 8 of the pressure-bearing part 7 to connect to the control system, and the control system is electrically connected to the alarm device. At this time, the total thickness of the entire graphene heater 12 is 13mm; the high-strength screws pass through the hot pressing plate on the hot press 10 to connect to the graphene heater 12.

[0043] In the prior art, melamine-impregnated adhesive film paper is pressurized and heated by a hot press 10 and then pasted on the artificial board. A heating channel is opened in the hot press plate 11 on the traditional hot press 10, and heat is usually provided to the hot press plate 11 by means of thermal oil, resistance wire, heating tube, etc. The utility model provides a hot press 10 with a graphene heater 12, which can replace the traditional way of providing heat. The original hot press 10 can remain unchanged, and the graphite heater can be directly set on one side of the original hot press plate 11 that provides heat. The original heating method is suspended (the thermal oil, etc. can also be removed), and the graphene heater 12 of the utility model can be powered on to generate heat.

[0044] The utility model provides a hot press 10 with a graphene heater 12. The hot press 10 uses the graphene heater 12 to replace the traditional heating method to avoid the generation of CO, CO2, NO SHarmful gases such as argon and argon are eliminated, thus avoiding environmental pollution; graphene materials are used for heating, which improves the utilization rate of thermal energy, and the comprehensive thermal energy utilization rate reaches more than 85%; the graphene heater 12 is used for instant heating, which effectively improves work efficiency and increases production capacity; no full-time technicians are required to maintain the boiler, and no regular replacement and replenishment of thermal oil are required, which improves efficiency and saves manpower and material resources; especially in recent years, the country has vigorously developed green electricity, electricity prices have dropped, and natural gas prices have risen every year. The use of the hot press 10 of the utility model can save more than 35% of costs; since boilers, pressure pipes and natural gas are not used, safety hazards are eliminated and the risk factor is reduced; compared with traditional thermal oil The heat supply method of the heat pipe and the resistance wire increases the heating speed, improves the heat conversion efficiency, reduces the cost, increases the service life, improves the production efficiency, avoids the occurrence of safety accidents, and improves the safety factor; the graphene heater 12 can be directly fixed on the hot pressing plate 11 of the hot press 10, without the need to modify the original equipment or special technology; the graphene heater 12 can be manufactured in different specifications (such as 4×8 feet, 4×9 feet, 5×8 feet) according to needs, which is suitable for both new equipment and old equipment modification; the graphene heater 12 used in the hot press 10 has been tested for 3000 hours continuously, and the equipment operates normally and has a long service life. The utility model provides a hot press with a graphene heater 12, which is used in the preparation of veneer artificial boards, specifically melamine impregnated film paper is pressed and heated and pasted on particleboard and density board. The actual temperature of the hot press 10 can be controlled within ±1°C of the set temperature, and the maximum pressure it can withstand is 18MPA and the temperature is 200-250°C.

[0045] The utility model provides a hot press with a graphene heater, which has a simple structure, is easy to install, has high heat utilization rate and low energy consumption, is safe, energy-saving and environmentally friendly, generates electricity instantaneously, effectively improves production efficiency and capacity, and has a long service life. It can fundamentally solve the current situation of high energy consumption, high safety risks and high pollution of traditional hot presses in providing heat, and is suitable for industrial production and application.

Claims

1. A hot press with a graphene heater, characterized in that, A graphene heater (12) is provided on the hot press (10); the graphene heater (12) comprises a combination part and a pressure-bearing part (7), the combination part sequentially comprising a heat transfer layer (1), an insulating layer (2), a graphene heating layer (3), an insulating layer (2), a heat insulating layer (4), and a protective cover plate (5); the pressure-bearing part (7) is provided in the combination part, the pressure-bearing part (7) is provided between the edges of the heat transfer layer (1) and the protective cover plate (5) of the combination part, and the insulation layer (2), the graphene heating layer (3), and the heat insulating layer (4) are provided inside the heat transfer layer (1), the protective cover plate (5), and the pressure-bearing part (7); the graphene heating layer (3) is connected to a wire, and the wire passes through the pressure-bearing part (7) to connect to a control system.

2. A hot press with a graphene heater according to claim 1, characterized in that: A pressure strip (6) is provided between the heat transfer layer (1) and the insulating layer (2) on the combined portion. The pressure strip (6) is connected to the pressure portion (7), and the surface of the pressure strip (6) is flush with the surface of the pressure portion (7).

3. A hot press with a graphene heater according to claim 1, characterized in that: The combined portion is connected to the pressure-bearing portion (7).

4. A hot press with a graphene heater according to claim 1, characterized in that: A temperature measuring element is provided on the graphene heating layer (3), the temperature measuring element is connected to a wire, and the wire passes through the pressure-bearing part (7) to connect to a control system.

5. A hot press with a graphene heater according to claim 4, characterized in that: An insulating layer (2) is provided between the pressure-bearing portion (7) and the graphene heating layer (3); the wires connected to the graphene heating layer (3) and the wires connected to the temperature measuring element pass through the insulating layer (2); and the pressure-bearing portion (7) is connected to a control system.

6. The hot press with a graphene heater according to claim 1, characterized in that: The pressure-bearing portion (7) consists of four sub-pressure-bearing portions.

7. The hot press with a graphene heater according to claim 1, characterized in that: The heat transfer layer (1) is made of stainless steel, manganese steel or aluminum alloy material, with a thickness of ≥3 mm; the pressure strip (6) is made of high-hardness metal material, with a thickness of ≥3 mm; the pressure bearing part (7) is made of high-hardness metal material; the heat insulation layer (4) is made of polymer material, with a thickness of ≥3 mm; the protective cover plate (5) is made of stainless steel, manganese steel or aluminum alloy material, with a thickness of ≥1 mm.

8. The hot press with a graphene heater according to claim 1, characterized in that: The insulating layer (2) is made of insulating glue.

9. The hot press with a graphene heater according to claim 1, characterized in that: The graphene heating layer (3) is composed of graphene crystals or graphene filament bundles.

10. The hot press with a graphene heater according to claim 1, characterized in that: The total thickness of the graphene heater (12) is ≤15 mm.

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