Hot pressing device

Abstract

The invention relates to the technical field of hot-pressing processes, and discloses a hot-pressing device which comprises a box body, a laminating roller, a hot-pressing mechanism and a conveying roller, an inner cavity of the box body is divided into a laminating cavity, a hot-pressing cavity and a discharging cavity which are communicated in sequence, air vents communicating the laminating cavity, the hot-pressing cavity and the discharging cavity are located at the lower ends of the cavities, and at least one air inlet is formed in the top of the hot-pressing cavity; a first air outlet is formed in the top of the laminating cavity; a second air outlet is formed in the top of the discharging cavity; the laminating roller is arranged in the laminating cavity, and a plurality of foils enter the laminating cavity through the first air outlet, are laminated at the laminating roller and are input into the hot pressing cavity through the laminating roller; the hot pressing mechanism is arranged in the hot pressing cavity and is used for performing hot pressing on the plurality of laminated foils; the conveying roller is arranged in the discharging cavity and used for conveying the laminated foil obtained after hot pressing to the outside of the discharging cavity through the second air outlet. A semi-closed continuous hot pressing mode is adopted, the structure is simplified, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hot pressing process, in particular to a hot pressing device. Background Art

[0002] Graphene-copper composites are composite materials obtained by hot pressing monene copper foil grown by chemical vapor deposition. In recent years, the graphene-copper composites reported to be laminated and hot pressed with monene copper foil as the substrate have excellent electrical conductivity. They use the ultra-high carrier mobility of graphene combined with the high carrier concentration of copper to enhance the electrical conductivity of copper. Graphene-copper composites can also provide higher current carrying capacity, better heat dissipation and corrosion resistance, and have a wide range of applications in many fields, such as electronic devices, conductive materials and thermal management systems.

[0003] At present, the equipment for producing graphene-copper composite materials based on monene copper foil generally adopts intermittent operation, that is, the pre-pressed multi-layer monene copper foil is placed on a conveyor belt, and the batches of monene copper foil are transported to the hot pressing module for pressing by the power of the conveyor belt. Since the operating environment of the hot pressing module requires high temperature and high pressure, copper and graphene are prone to chemical reaction with oxygen in a high temperature environment, so the hot pressing process needs to be isolated from oxygen.

[0004] The defects of this structure are: the hot pressing device has high requirements for sealing, the sealing structure is relatively complex, the loading and unloading of monene copper foil needs to consider the replacement of oxygen, and the monene copper foil needs to be cut to a fixed size in advance, which greatly limits the production efficiency. Summary of the invention

[0005] In view of this, the present invention provides a hot pressing device to solve the problem that the existing hot pressing device adopts intermittent operation, has high requirements for sealing, leads to complex structure and low production efficiency.

[0006] The present invention provides a hot pressing device, comprising:

[0007] A box body, wherein the inner cavity of the box body is divided into a laminating cavity, a hot pressing cavity and a discharging cavity which are connected and closed in sequence, and an air vent connecting the laminating cavity, the hot pressing cavity and the discharging cavity is located at the lower end of each cavity, at least one air inlet is provided at the top of the hot pressing cavity, a first air outlet is provided at the top of the laminating cavity, and a second air outlet is provided at the top of the discharging cavity;

[0008] A laminating roller is arranged in the laminating chamber, a plurality of foils enter the laminating chamber through the first air outlet, are laminated at the laminating roller, and are input into the hot pressing chamber through the laminating roller;

[0009] A hot pressing mechanism, disposed in the hot pressing chamber, for hot pressing the plurality of foil materials after bonding;

[0010] The transmission roller is arranged in the discharge cavity and is used for transmitting the laminated foil after heat pressing to the outside of the discharge cavity through the second air outlet.

[0011] Beneficial effects: The hot pressing device of the present invention fills the hot pressing chamber in the middle with inert gas, and exhausts the gas through the bonding chamber and the discharge chamber on both sides to form a semi-sealed structure. It only needs to ensure the sealing of the inert gas in the hot pressing chamber to meet the oxygen-free environment requirements of the hot pressing process, thus simplifying the structure of the hot pressing device. By utilizing the bending characteristics of the foil, multiple foils are continuously input into the bonding chamber from the first air outlet, and enter the hot pressing chamber after bonding by the bonding roller. The hot pressing mechanism in the hot pressing chamber performs hot pressing on the multiple bonded foils, and finally the hot-pressed and fused laminated foils are continuously transmitted through the transmission roller, so that continuous production can be achieved, thereby significantly improving production efficiency. The discharge chamber can provide a certain oxygen-free environment to prevent the laminated foils that have not been completely cooled from being oxidized.

[0012] In an optional embodiment, the laminating roller is disposed at the lower end of the laminating chamber, and after the plurality of foils are laminated at the laminating roller, they are input into the hot pressing chamber through the vent between the laminating chamber and the hot pressing chamber;

[0013] The transfer roller is arranged at the lower end of the discharge chamber, and the laminated foil is input into the discharge chamber through the vent between the hot pressing chamber and the discharge chamber.

[0014] Beneficial effect: The air inlet, the first air outlet and the second air outlet are all located at the top of the box, and the vent is located at the lower end of each cavity, forming an airflow that first flows downward in the hot pressing cavity and then flows upward from the laminating cavity and the discharge cavity. The vent has the functions of ventilation and foil transmission, so that the flow path of the airflow is consistent with the transportation path of the foil, so as to maintain an oxygen-free sealing environment for the foil and achieve a better sealing effect.

[0015] In an optional embodiment, the laminating roller is a driven roller; the transmission roller is an active roller, which is transmission-connected to a driving mechanism, and the driving mechanism drives the transmission roller to rotate.

[0016] Beneficial effect: The laminating roller is set as a driven roller, which can better and more smoothly transmit the multi-layer foil and avoid mutual displacement and wrinkles between the multi-layer foils. The pressure, speed and transmission stroke of the transmission roller can be adjusted by the driving mechanism, so that the transmission roller pulls the laminated foil for transmission after the foil is hot-pressed and fused.

[0017] In an optional embodiment, it further includes an unwinding mechanism, and the unwinding mechanism includes:

[0018] A plurality of unwinding rollers are arranged at intervals outside the laminating chamber;

[0019] A plurality of unwinding guide rollers correspond one to one with the plurality of unwinding rollers, and the plurality of unwinding guide rollers are arranged above the laminating chamber at intervals, and are suitable for conveying the plurality of foil materials to the laminating chamber through the first air outlet.

[0020] Beneficial effects: Each unwinding roller corresponds to an unwinding guide roller, which conveys an independent foil separately and keeps the foil at a certain tension. There are gaps between multiple foils to avoid the multiple foils affecting each other and damaging the material on the surface of the foil. The laminating roller only laminates multiple foils without mutual adhesion, ensuring that the multiple foils it outputs no longer move with each other, and can also play a guiding role so that the foils can enter the hot pressing chamber for hot pressing.

[0021] In an optional embodiment, the hot pressing mechanism includes:

[0022] A first hot pressing mold is fixedly arranged in the hot pressing chamber;

[0023] The second hot pressing mold is movably disposed in the hot pressing cavity and is arranged opposite to the first hot pressing mold. The second hot pressing mold can move toward the first hot pressing mold and hot press the multiple foils after bonding.

[0024] Beneficial effect: The laminated foils are transported between the first hot pressing mold and the second hot pressing mold, and the second hot pressing mold is moved toward the first hot pressing mold to hot press and fuse the multiple foils into an integral laminated foil.

[0025] In an optional embodiment, a winding mechanism is further included, and the winding mechanism includes:

[0026] A winding roller, arranged outside the discharge cavity;

[0027] At least one winding guide roller is arranged above the discharge cavity and is used for guiding and transmitting the laminated foil to the winding roller.

[0028] Beneficial effect: The winding guide roller can continuously transport the laminated foil after hot pressing from the transmission roller to the winding roller. The laminated foil has a bending characteristic and can be continuously stored on the winding roller. The winding guide roller plays a guiding role and maintains a certain tension when the laminated foil is stored on the winding roller, which is conducive to the stable storage of the laminated foil.

[0029] In an optional embodiment, it further includes an air intake valve, wherein the air intake valve introduces an inert gas having a density greater than that of air into the hot pressing chamber through at least one of the air intake ports.

[0030] Beneficial effect: Since the density of the inert gas input by the air inlet valve is greater than that of air, it is difficult for air to enter the box from the top. When the gas in the box is stable, even if the inert gas is stopped, the hot pressing chamber can still maintain an oxygen-free sealed environment, which is stable and reliable.

[0031] In an optional embodiment, the bonding chamber, the hot pressing chamber and the discharge chamber are separated by partitions, and the lower sides of a pair of the partitions are respectively provided with vents for entering and exiting the foil material and the laminated foil material, and each of the partitions is respectively provided with a first oxygen detector near the vent, and the first oxygen detector is electrically connected to the air inlet valve.

[0032] Beneficial effect: A first oxygen detector is arranged on the partition near the air vent for the inlet and outlet foil and the laminated foil, which can detect the oxygen concentration in the hot pressing chamber and open the air intake valve when the oxygen concentration is too high. When the oxygen concentration drops to the range required for hot pressing, the air intake valve is closed to reduce the consumption of inert gas and save the use cost while ensuring an oxygen-free environment for hot pressing.

[0033] In an optional embodiment, an exhaust mechanism is further provided above the box body, and second oxygen detectors are respectively provided on the box body near the first air outlet and the second air outlet, and the second oxygen detector is electrically connected to the exhaust mechanism.

[0034] Beneficial effect: The second oxygen detector is used to detect the external oxygen concentration. The overflow of inert gas will reduce the external oxygen concentration. In order to ensure the safety of operators, it is necessary to increase the power of the exhaust mechanism when the external oxygen concentration is too low. When the external oxygen concentration returns to normal, the power of the exhaust mechanism is reduced.

[0035] In an optional embodiment, a third oxygen detector is respectively provided at the upper end of the laminating chamber and the upper end of the discharging chamber.

[0036] Beneficial effect: The third oxygen detector is used to detect the oxygen concentration generated by the diffusion of external air into the bonding chamber and the discharge chamber, ensuring that the bonding chamber and the discharge chamber have a certain oxygen-free environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a structural schematic diagram of a hot pressing device according to an embodiment of the present invention;

[0039] Figure 2 Another structural schematic diagram of a hot pressing device according to an embodiment of the present invention;

[0040] Figure 3 for Figure 2 The main view;

[0041] Figure 4 Schematic diagram of the structure of the gas flow of the hot pressing device of an embodiment of the present invention.

[0042] Description of reference numerals:

[0043] 1. Box body; 101. Partition plate; 102. Laminating chamber; 103. Hot pressing chamber; 104. Discharging chamber; 105. Air inlet valve; 106. Air inlet; 107. First air outlet; 108. Second air outlet; 109. Vent; 2. Unwinding mechanism; 201. Unwinding roller; 202. Unwinding guide roller; 3. Laminating roller; 4. Hot pressing mechanism; 401. First hot pressing mold; 402. Second hot pressing mold; 403. Lifting column; 5. Transport roller; 6. Winding mechanism; 601. Winding roller; 602. Winding guide roller; 7. Bellows; 8. First oxygen detector; 9. Second oxygen detector; 10. Third oxygen detector; 11. Exhaust mechanism; 12. Foil; 13. Front window; 14. Laminated foil. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0045] Combine the following Figures 1 to 4 , describing an embodiment of the present invention.

[0046] According to an embodiment of the present invention, Figure 1 and Figure 2As shown, a hot pressing device is provided, which mainly includes: a box body 1, an unwinding mechanism 2, a laminating roller 3, a hot pressing mechanism 4, a transmission roller 5 and a winding mechanism 6. The box body 1 is divided into a laminating chamber 102, a hot pressing chamber 103 and a discharge chamber 104 which are connected and closed in sequence by a pair of partitions 101. The vent 109 connecting the laminating chamber 102, the hot pressing chamber 103 and the discharge chamber 104 is located at the lower end of each chamber. The top of the hot pressing chamber 103 is provided with an air inlet valve 105 and at least one air inlet 106. The top of the laminating chamber 102 is provided with a first air outlet 107, and the top of the discharge chamber 104 is provided with a second air outlet 108. The unwinding mechanism 2 is arranged on the outside of the laminating chamber 102, and is used to convey a plurality of foils 12 to the laminating chamber 102 through the first air outlet 107. The laminating roller 3 is arranged in the laminating chamber 102. The plurality of foils 12 enter the laminating chamber 102 through the first air outlet 107, are laminated at the laminating roller 3, and are input into the hot pressing chamber 103 through the laminating roller 3. The hot pressing mechanism 4 is arranged in the hot pressing chamber 103, and is used to perform hot pressing on the laminated plurality of foils 12. The transmission roller 5 is arranged in the discharge chamber 104, and is used to transmit the laminated foil 14 after hot pressing to the winding mechanism 6 through the second air outlet 108. The winding mechanism 6 is arranged outside the discharge chamber 104.

[0047] The hot pressing device provided by the embodiment of the present invention is filled with inert gas into the hot pressing chamber 103 in the middle, and exhausts gas through the bonding chamber 102 and the discharge chamber 104 on both sides to form a semi-sealed structure. It only needs to ensure that the inert gas in the hot pressing chamber 103 is sealed to meet the oxygen-free environment requirements of the hot pressing process, thereby simplifying the structure of the hot pressing device. By utilizing the bending characteristics of the foil 12, multiple foils 12 are continuously input into the bonding chamber 102 from the first air outlet 107 through the unwinding mechanism 2, and enter the hot pressing chamber 103 after bonding by the bonding roller 3. The hot pressing mechanism 4 in the hot pressing chamber 103 performs hot pressing on the multiple bonded foils 12, and finally, the laminated foils 14 after hot pressing and fusion are continuously collected through the transmission roller 5 and the winding mechanism 6, so that continuous production can be achieved, thereby significantly improving production efficiency. The discharge chamber 104 can provide a certain oxygen-free environment to prevent the laminated foils 14 that have not been completely cooled from being oxidized.

[0048] Specifically, Figure 1 As shown, the box body 1 is a closed structure, and a transparent front window 13 can be provided on the front. Figure 2As shown, the partition 101 separates the box body 1 into a laminating chamber 102, a hot pressing chamber 103 and a discharge chamber 104 which are independent and closed from each other in the horizontal direction, wherein the hot pressing chamber 103 is located in the middle, and the laminating chamber 102 and the discharge chamber 104 are located on both sides of the hot pressing chamber 103 respectively. The air inlet valve 105 is used to introduce inert gas into the hot pressing chamber 103 to replace oxygen and water vapor in the box body 1 to achieve inert gas protection. The inert gas fills the hot pressing chamber 103 and flows out from the first air outlet 107 of the laminating chamber 102 and the second air outlet 108 of the discharge chamber 104 to form a semi-enclosed oxygen-free environment in the hot pressing chamber 103, and the laminating chamber 102 and the discharge chamber 104 form a certain oxygen-free environment. The air inlet valve 105 can be a solenoid valve, a mechanical valve, etc.

[0049] It should be noted that the embodiment of the present invention does not limit the number of air inlets 106 , and two, three or more air inlets 106 may be provided as required.

[0050] In one embodiment, Figure 2 As shown, the laminating roller 3 is arranged at the lower end of the laminating chamber 102. After laminating the plurality of foils 12 at the laminating roller 3, the plurality of foils 12 are input into the hot pressing chamber 103 through the vent 109 between the laminating chamber 102 and the hot pressing chamber 103. The transport roller 5 is arranged at the lower end of the discharge chamber 104. The laminated foil 14 is input into the discharge chamber 104 through the vent 109 between the hot pressing chamber 103 and the discharge chamber 104. The lower sides of the pair of partitions 101 are respectively provided with vents 109 for the foils 12 to enter and exit.

[0051] The air inlet 106, the first air outlet 107 and the second air outlet 108 are all located at the top of the box body 1, and the vents 109 between the laminating chamber 102, the hot pressing chamber 103 and the discharge chamber 104 are all located at the lower side of the partition 101, forming an airflow that first flows downward in the hot pressing chamber 103, passes through the vent 109, and then flows upward from the laminating chamber 102 and the discharge chamber 104 respectively. The airflow is consistent with the transportation path of the foil 12 to maintain an oxygen-free sealed environment for the foil 12. The sealing effect is better.

[0052] In one embodiment, Figure 1 and Figure 2 As shown, the unwinding mechanism 2 includes: a plurality of unwinding rollers 201 and a plurality of unwinding guide rollers 202. The plurality of unwinding rollers 201 are arranged at intervals outside the bonding chamber 102. The plurality of unwinding guide rollers 202 correspond to the plurality of unwinding rollers 201 one by one, and the plurality of unwinding guide rollers 202 are arranged at intervals above the bonding chamber 102, and are suitable for conveying a plurality of foils 12 to the bonding chamber 102 through the first air outlet 107.

[0053] Each unwinding roller 201 corresponds to an unwinding guide roller 202, which transports an independent foil 12 separately and keeps a certain tension on the foil 12. Gaps are left between multiple foils 12 to avoid the multiple foils 12 from affecting each other and damaging the material on the surface of the foil 12. The laminating roller 3 only laminates multiple foils 12 without mutual adhesion, ensuring that the multiple foils 12 outputted no longer move relative to each other, and can also play a guiding role so that the foil 12 enters the hot pressing chamber 103 for hot pressing. Taking the graphene-copper composite material as an example, the multilayer monene copper foils are left with gaps before being transported to the laminating roller 3, and will not rub against each other, so as to avoid pyrolysis and damage to the graphene film on the surface of the monene copper foil.

[0054] Specifically, Figure 2 As shown, a plurality of unwinding guide rollers 202 are arranged at intervals above the laminating chamber 102, and the laminating roller 3 is rotatably arranged at the lower end of the laminating chamber 102 through a base, so that the foil 12 can enter the laminating chamber 102 from top to bottom. The plurality of unwinding rollers 201 are respectively provided with independent driving parts, such as a fixed torque motor or a magnetic powder clutch to fix the shaft torque, so as to ensure that the foil 12 has a certain tension. After the torque is fixed, the tension will change with the change of the radius of the foil 12.

[0055] It should be noted that the embodiment of the present invention does not limit the number of unwinding rollers 201 and unwinding guide rollers 202 , and two, three or more than three can be selected as needed to match the number of independent foils 12 .

[0056] In one embodiment, Figure 2 and Figure 3 As shown, the hot pressing mechanism 4 mainly includes: a first hot pressing mold 401 and a second hot pressing mold 402. The first hot pressing mold 401 is fixed in the hot pressing chamber 103. The second hot pressing mold 402 is movably arranged in the hot pressing chamber 103 and arranged opposite to the first hot pressing mold 401. The foil 12 is arranged between the first hot pressing mold 401 and the second hot pressing mold 402. The second hot pressing mold 402 can move toward the first hot pressing mold 401 and hot press the multiple foils 12 after bonding. The bonded foil 12 is transported between the first hot pressing mold 401 and the second hot pressing mold 402, and the second hot pressing mold 402 is moved toward the first hot pressing mold 401 to hot press and fuse the multiple foils 12 into a whole laminated foil 14.

[0057] Specifically, the first hot pressing mold 401 is fixed at the bottom of the hot pressing chamber 103, and its upper surface is flush with the foil 12. The first hot pressing mold 401 and the second hot pressing mold 402 are both integrated with a heating and temperature control module, and the maximum heating temperature is about 1200°C. The heating and temperature control module can select any existing structure as needed. The laminating roller 3 and the transmission roller 5 can flatten the foil 12 so that the foil 12 is in a straight state in the hot pressing chamber 103, so that the first hot pressing mold 401 and the second hot pressing mold 402 can hot press the foil 12.

[0058] Further, in one embodiment, if Figure 3 and Figure 4 As shown, the hot pressing mechanism 4 further includes: a lifting column 403 and a driving member. The lifting column 403 is arranged on the box body 1, one end of which is connected to the second hot pressing mold 402, and the other end of which extends to the outside of the box body 1. The driving member is arranged outside the box body 1 and connected to the other end of the lifting column 403, and is used to drive the lifting column 403 to drive the second hot pressing mold 402 to move, so as to hot press the multiple foils 12 after bonding. The driving member can be a conventional driving member such as a motor, a cylinder, a hydraulic cylinder, etc.

[0059] The lifting column 403 is driven by the driving member to drive the second hot pressing mold 402 to move toward the first hot pressing mold 401 to realize hot pressing of the foil 12. The structure is simple and the operation is convenient. One end of the lifting column 403 is arranged in the box body 1, and the other end is arranged outside the box body 1, and the driving member is arranged outside the box body 1. The lifting column 403 and the driving member can reduce the internal space of the box body 1 occupied by the lifting column 403 and the driving member, especially the space occupied by the hot pressing chamber 103, so as to improve the space utilization rate of the hot pressing chamber 103, and at the same time reduce the interference of the lifting column 403 and the driving member to the hot pressing process.

[0060] Furthermore, in one embodiment, if Figure 3 As shown, a bellows 7 is provided between the second hot pressing mold 402 and the inner wall of the box body 1, and the lifting column 403 is provided in the bellows 7. The lifting column 403 is isolated from the hot pressing chamber 103 by the bellows 7 to achieve a sealing effect and avoid internal and external gas exchange at the connection between the lifting column 403 and the box body 1.

[0061] In one embodiment, Figure 2 and Figure 3As shown, the winding mechanism 6 includes: a winding roller 601 and at least one winding guide roller 602. The winding roller 601 is arranged outside the discharge cavity 104. At least one winding guide roller 602 is arranged above the discharge cavity 104, and is used to guide and transmit the laminated foil 14 to the winding roller 601. The winding guide roller 602 can continuously transport the laminated foil 14 after hot pressing from the transmission roller 5 to the winding roller 601. The laminated foil 14 has a bending characteristic and can be continuously stored on the winding roller 601. The winding guide roller 602 plays a guiding role and keeps a certain tension when the laminated foil 14 is stored in the winding roller 601, which is conducive to the stable storage of the laminated foil 14.

[0062] Specifically, at least one winding guide roller 602 is disposed above the discharge chamber 104, and the transmission roller 5 can be rotatably disposed at the lower end of the discharge chamber 104 through another base. The transmission roller 5 can also guide the laminated foil 14 after hot pressing and transport it upward to the winding guide roller 602, and the laminated foil 14 is then reversed by the winding guide roller 602 and stored on the winding roller 601. Similarly, the winding roller 601 is also provided with an independent driving member, such as a fixed torque motor or a fixed shaft torque through a magnetic powder clutch, to ensure that the laminated foil 14 has a certain tension.

[0063] It should be noted that the embodiment of the present invention does not limit the number of winding guide rollers 602, and two, three or more than three rollers may be provided as required.

[0064] Further, in one embodiment, the transmission roller 5 is used as an active roller and is connected to the driving mechanism. The driving mechanism drives the transmission roller 5 to rotate. The driving mechanism can use a driving motor. The laminating roller 3, the unwinding guide roller 202 and the winding guide roller 602 are all used as driven rollers. The laminating roller 3 is set as a driven roller, which can better and more smoothly transmit the multi-layer foil 12 and avoid mutual displacement and wrinkles between the multi-layer foils 12. The pressure, speed and transmission stroke of the transmission roller 5 can be adjusted so that the transmission roller 5 can pull the laminated foil 14 for transmission after the foil 12 completes the hot pressing fusion.

[0065] In one embodiment, Figure 4 As shown, the air inlet valve 105 introduces an inert gas with a density greater than that of air, such as argon, into the hot pressing chamber 103 through at least one air inlet 106. Since the density of the inert gas input by the air inlet valve 105 is greater than that of air, it is difficult for air to enter the box body 1 from the upper end. When the gas in the box body 1 is stable, even if the inert gas is stopped from being filled, the hot pressing chamber 103 can still maintain an oxygen-free sealed environment, which is stable and reliable.

[0066] In one embodiment, Figure 3 and Figure 4As shown, the lower side of a pair of partitions 101 is provided with air vents 109 for entering and exiting the foil 12 and the laminated foil 14, respectively. Each partition 101 is provided with a first oxygen detector 8 near the air vent 109, and the first oxygen detector 8 is electrically connected to the air inlet valve 105. The first oxygen detector 8 is arranged at the air vent 109 near the air inlet and exit foil 12 and the laminated foil 14 of the partition 101, which can detect the oxygen concentration value in the hot pressing chamber 103, and open the air inlet valve 105 when the oxygen concentration is too high, and close the air inlet valve 105 when the oxygen concentration is reduced to the required range for hot pressing, so as to reduce the consumption of inert gas and save the use cost under the premise of ensuring an oxygen-free environment for hot pressing.

[0067] Further, in one embodiment, if Figure 4 As shown, an exhaust mechanism 11 is further provided above the box body 1, and a second oxygen detector 9 is respectively provided near the first air outlet 107 and the second air outlet 108 of the box body 1, and the second oxygen detector 9 is electrically connected to the exhaust mechanism 11. The second oxygen detector 9 is used to detect the oxygen concentration of the outside world. The overflow of inert gas will reduce the oxygen concentration of the outside world. In order to ensure the safety of the operator, it is necessary to increase the power of the exhaust mechanism 11 when the oxygen concentration of the outside world is too low, and reduce the power of the exhaust mechanism 11 when the oxygen concentration of the outside world returns to the normal concentration.

[0068] It should be noted that the embodiment of the present invention does not limit the exhaust mechanism 11, and any existing structure can be selected as needed, for example, the exhaust mechanism 11 is an exhaust fan.

[0069] In one embodiment, the upper end of the bonding chamber 102 and the upper end of the discharge chamber 104 are respectively provided with a third oxygen detector 10. Specifically, the third oxygen detector 10 can be arranged at the upper end of the partition 101. The third oxygen detector 10 is used to detect the oxygen concentration generated by the diffusion of external air into the bonding chamber 102 and the discharge chamber 104, so as to ensure that the bonding chamber 102 and the discharge chamber 104 have a certain oxygen-free environment.

[0070] The working principle of the embodiment of the present invention is as follows:

[0071] The foil 12 is described by taking the molybdenum copper foil as an example. Before hot pressing, the air inlet valve 105 is opened first, and the inert gas is introduced into the hot pressing chamber 103 through the air inlet 106. The inert gas fills the hot pressing chamber 103, and flows from the air vents 109 of the partitions 101 on both sides to the bonding chamber 102 and the discharge chamber 104, and finally flows out from the first air outlet 107 and the second air outlet 108, forming a semi-enclosed oxygen-free environment. After the oxygen-free environment is stable, the air inlet valve 105 is closed.

[0072] For example, two unwinding rollers 201 and two unwinding guide rollers 202 are provided. A single layer of monene copper foil is placed on each unwinding roller 201 in advance, and after adjusting the direction through an unwinding guide roller 202, it enters the laminating chamber 102 downward from the first air outlet 107. Two layers of monene copper foil enter the laminating chamber 102 at intervals, meet at the laminating roller 3, are laminated and adjusted in direction through the laminating roller 3, and enter the hot pressing chamber 103 through the vent 109 of the partition 101 in a horizontally stacked posture.

[0073] The driving member drives the lifting column 403 to drive the second hot pressing mold 402 to move downward, and cooperate with the first hot pressing mold 401 to hot press and fuse the two stacked layers of monene copper foil. The two layers of monene copper foil are fused into a whole foil under high temperature, high pressure and oxygen isolation. After that, the graphene-copper composite material after hot pressing is adjusted in direction by the transmission roller 5 in the discharge chamber 104 and transported upward to the winding guide roller 602 respectively, and finally transported to the winding roller 601 for storage under the guidance of the winding guide roller 602.

[0074] When the first oxygen detector 8 detects that the oxygen concentration in the hot pressing chamber 103 exceeds the first preset value, the air inlet valve 105 is reopened. When the first oxygen detector 8 detects that the oxygen concentration in the hot pressing chamber 103 drops to the required range for hot pressing, the air inlet valve 105 is closed.

[0075] When the second oxygen detector 9 detects that the external oxygen concentration is lower than the second preset value, the power of the exhaust mechanism 11 is increased. When the second oxygen detector 9 detects that the external oxygen concentration returns to the normal concentration range, the power of the exhaust mechanism 11 is reduced.

[0076] To realize the basic functions of the hot pressing device, the hot pressing device in the present embodiment may further include other necessary modules or components, such as wires, control systems, etc. It should be noted that other necessary modules or components included in the hot pressing device may be selected from any suitable existing structures. In order to clearly and briefly illustrate the technical solution provided in the present embodiment, the above-mentioned parts will not be described in detail here, and the drawings of the specification are also simplified accordingly. However, it should be understood that the embodiments of the present invention are not limited in scope.

[0077] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A hot pressing device, characterized in that: include: A box body (1), wherein the inner cavity of the box body (1) is divided into a laminating cavity (102), a hot pressing cavity (103) and a discharge cavity (104) which are connected in sequence, a vent (109) which connects the laminating cavity (102), the hot pressing cavity (103) and the discharge cavity (104) is located at the lower end of each cavity, at least one air inlet (106) is provided at the top of the hot pressing cavity (103), a first air outlet (107) is provided at the top of the laminating cavity (102), and a second air outlet (108) is provided at the top of the discharge cavity (104); A laminating roller (3) is arranged in the laminating chamber (102); a plurality of foil materials (12) enter the laminating chamber (102) through the first air outlet (107), are laminated at the laminating roller (3), and are input into the hot pressing chamber (103) through the laminating roller (3); A hot pressing mechanism (4), disposed in the hot pressing chamber (103), for hot pressing the plurality of foil materials (12) after bonding; The transfer roller (5) is arranged in the discharge cavity (104) and is used to transfer the laminated foil material (14) after heat pressing to the outside of the discharge cavity (104) through the second air outlet (108).

2. The hot pressing device according to claim 1, characterized in that: The laminating roller (3) is arranged at the lower end of the laminating chamber (102); after laminating the plurality of foils (12) at the laminating roller (3), the plurality of foils (12) are input into the hot pressing chamber (103) through the vent (109) between the laminating chamber (102) and the hot pressing chamber (103); The transfer roller (5) is arranged at the lower end of the discharge chamber (104), and the laminated foil (14) is input into the discharge chamber (104) through the vent (109) between the hot pressing chamber (103) and the discharge chamber (104).

3. The hot pressing device according to claim 1 or 2, characterized in that: The laminating roller (3) is a driven roller; the transmission roller (5) is an active roller, which is transmission-connected to a driving mechanism, and the driving mechanism drives the transmission roller (5) to rotate.

4. The hot pressing device according to claim 1 or 2, characterized in that: It also includes an unwinding mechanism (2), wherein the unwinding mechanism (2) includes: A plurality of unwinding rollers (201) are arranged at intervals outside the laminating chamber (102); A plurality of unwinding guide rollers (202) correspond one to one with the plurality of unwinding rollers (201); the plurality of unwinding guide rollers (202) are arranged at intervals above the bonding chamber (102) and are suitable for conveying the plurality of foil materials (12) to the bonding chamber (102) through the first air outlet (107).

5. The hot pressing device according to claim 1 or 2, characterized in that: The hot pressing mechanism (4) comprises: A first hot pressing mold (401) is fixedly disposed in the hot pressing chamber (103); The second hot pressing mold (402) is movably arranged in the hot pressing chamber (103) and is arranged opposite to the first hot pressing mold (401). The second hot pressing mold (402) can move toward the first hot pressing mold (401) and hot press the multiple foil materials (12) after bonding.

6. The hot pressing device according to claim 1 or 2, characterized in that: It also includes a winding mechanism (6), wherein the winding mechanism (6) includes: A winding roller (601) is arranged outside the discharge cavity (104); At least one winding guide roller (602) is disposed above the discharge cavity (104) and is used for guiding and transmitting the laminated foil material (14) to the winding roller (601).

7. The hot pressing device according to claim 1, characterized in that: It also includes an air intake valve (105), wherein the air intake valve (105) introduces an inert gas having a density greater than that of air into the hot pressing chamber (103) through at least one of the air intake ports (106).

8. The hot pressing device according to claim 7, characterized in that: The laminating chamber (102), the hot pressing chamber (103) and the discharge chamber (104) are separated by partitions (101), and the lower sides of a pair of the partitions (101) are respectively provided with ventilation holes (109) for entering and exiting the foil material (12) and the laminated foil material (14). Each of the partitions (101) is respectively provided with a first oxygen detector (8) near the ventilation hole (109), and the first oxygen detector (8) is electrically connected to the air inlet valve (105).

9. The hot pressing device according to claim 1, characterized in that: An exhaust mechanism (11) is also provided above the box body (1), and second oxygen detectors (9) are respectively provided on the box body (1) near the first air outlet (107) and the second air outlet (108), and the second oxygen detector (9) is electrically connected to the exhaust mechanism (11).

10. The hot pressing device according to claim 1, characterized in that: A third oxygen detector (10) is provided at the upper end of the laminating chamber (102) and the upper end of the discharging chamber (104), respectively.

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