Hot pressing device

Abstract

The utility model belongs to the technical field of PCB manufacturing, and relates to a hot pressing device. The hot pressing device comprises a rack, a driving mechanism and a plurality of hot pressing plates, wherein the hot pressing plates are arranged on the rack at intervals in the first direction; the driving mechanism is installed on the rack and used for driving the hot pressing plates to be close to or away from each other. The hot pressing plate comprises a plate body and a heating element, the plate body is provided with a liquid inlet, a liquid outlet and a flow channel, and the flow channel is communicated between the liquid inlet and the liquid outlet; the heating element is installed on the plate body and used for heating the plate body. The hot pressing device can be rapidly heated to the preset temperature, and the higher heating temperature can be achieved.

Description

Technical Field

[0001] This utility model belongs to the field of PCB manufacturing technology, and in particular relates to a hot pressing device. Background Technology

[0002] In modern electronics manufacturing, PCB (Printed Circuit Board) hot pressing equipment is the most crucial core equipment in the PCB lamination process. Its main function is to achieve the cross-linking reaction of resin materials under high temperature, high pressure, and low vacuum conditions, tightly bonding the resin layer with the copper foil layer to create a high-performance multilayer circuit board. Currently, most PCB hot pressing equipment on the market is oil-heated, a traditional technology that has been widely used in long-term production practice. However, the maximum heating temperature of traditional oil-heated hot pressing equipment is limited. With the rapid development of 5G communication technology and the artificial intelligence industry, the demand for high-frequency, high-speed circuit boards is constantly increasing, and traditional oil-heated hot pressing equipment can no longer meet the needs of industry development. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a hot pressing device that addresses the limitation of the maximum heating temperature of existing hot pressing devices.

[0004] To solve the above-mentioned technical problems, this utility model provides a hot pressing device, including a frame, a drive mechanism, and a plurality of hot pressing plates, wherein the plurality of hot pressing plates are spaced apart on the frame along a first direction; the drive mechanism is mounted on the frame and is used to drive the hot pressing plates to move closer to or further away from each other;

[0005] The hot press plate includes a plate body and a heating element. The plate body is provided with a liquid inlet, a liquid outlet and a flow channel, and the flow channel connects the liquid inlet and the liquid outlet. The heating element is installed on the plate body and is used to heat the plate body.

[0006] According to the hot pressing device of this utility model embodiment, a heating element and a flow channel for the heat-conducting medium are simultaneously provided on the hot pressing plate. During hot pressing, the material is placed in the pressing space between two adjacent hot pressing plates. Through the operation of the heating element, the heat-conducting medium in the plate and its flow channel can be rapidly heated to a preset temperature, thereby accelerating the pressing efficiency. Furthermore, compared to the prior art scheme that heats the heat-conducting medium by heating external pipelines, this utility model directly installs the heating element on the hot pressing plate, reducing the limitation of external pipelines on the temperature rise of the heat-conducting medium, thus achieving a higher heating temperature.

[0007] Optionally, the plate body is further provided with mounting holes, and the heating element is installed in the mounting holes.

[0008] Optionally, two flow channels are provided;

[0009] The flow directions of the heat-conducting medium in the two channels are opposite.

[0010] Optionally, along the first direction, the heating element is located between the two flow channels.

[0011] Optionally, a plurality of heating elements are provided, and the plurality of heating elements are spaced apart along the second direction;

[0012] The second direction intersects with the first direction.

[0013] Optionally, the flow channel includes a plurality of first sub-flow channels and a second sub-flow channel. The plurality of first sub-flow channels are spaced apart along the second direction, and two adjacent first sub-flow channels are connected through a second sub-flow channel, so that each first sub-flow channel is connected in series with the others.

[0014] Of the two first sub-channels located at the outermost edge along the second direction, one is connected to the inlet and the other is connected to the outlet;

[0015] Along the second direction, at least one of the heating elements is disposed between two adjacent first sub-channels;

[0016] The second direction intersects with the first direction.

[0017] Optionally, the first sub-channel is straight and extends in a third direction, and the second sub-channel is arc-shaped;

[0018] The heating element extends along the third direction;

[0019] The third direction, the second direction, and the first direction intersect each other in pairs;

[0020] Optionally, the heating element is an electric heating tube.

[0021] Optionally, the heat-conducting medium is oil.

[0022] Optionally, the hot pressing device further includes a first pipeline, a second pipeline, a liquid supply mechanism, and a cooling mechanism. The liquid supply mechanism is provided with a medium outlet and a medium inlet. The first pipeline connects the liquid inlet and the medium outlet, and the second pipeline connects the liquid outlet and the medium inlet.

[0023] The cooling mechanism is disposed in the second pipeline and is used to cool the heat-conducting medium in the second pipeline.

[0024] Optionally, the plurality of hot press plates include a first hot press plate and a second hot press plate. The first hot press plate is mounted on the frame, and the second hot press plate is spaced apart from the first hot press plate along the first direction. The second hot press plate is connected to the output end of the drive mechanism. The drive mechanism is used to drive the second hot press plate to move closer to or away from the first hot press plate.

[0025] Optionally, the plurality of hot press plates further includes a third hot press plate, which is slidably connected to the frame along the first direction and is disposed between the first hot press plate and the second hot press plate along the first direction.

[0026] Optionally, multiple third hot press plates are provided, and the multiple third hot press plates are spaced apart along the first direction and located between the first hot press plate and the second hot press plate.

[0027] Optionally, the hot pressing device further includes a first heat insulation component and a second heat insulation component, wherein the first heat insulation component is installed between the first hot pressing plate and the frame, and the second heat insulation component is installed between the output end of the drive mechanism and the second hot pressing plate.

[0028] Optionally, the driving mechanism includes a driving component and a movable platform. The driving component is mounted on the frame, and the movable platform is connected to the output end of the driving component. The driving component is used to drive the movable platform to move along the first direction.

[0029] The second heat insulation component is installed between the movable platform and the second hot press plate.

[0030] Optionally, the frame includes a first vacuum door, a second vacuum door, two side plates, and two horizontal plates. The two side plates are spaced apart along a fourth direction. The two horizontal plates are spaced apart along a first direction and are respectively connected to the two side plates. The first vacuum door and the second vacuum door are spaced apart along a fifth direction. The first vacuum door is connected to the two side plates and the two horizontal plates, and a cavity is formed between the first vacuum door and the two side plates and the two horizontal plates.

[0031] The second vacuum door is slidably connected between the two side plates, so that the second vacuum door can slide between a closed position that closes the cavity and an open position that fully opens the cavity;

[0032] Each of the aforementioned hot press plates is disposed within the cavity;

[0033] The fifth direction and the fourth direction are perpendicular to each other from the first direction.

[0034] Optionally, each of the hot press plates can be slidably connected to at least one of the side plates along the first direction. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a hot pressing device provided in an embodiment of the present invention;

[0036] Figure 2 This is another schematic diagram of the hot pressing device provided in one embodiment of the present invention (when no material is placed);

[0037] Figure 3 This is another schematic diagram of the hot pressing device provided in one embodiment of the present invention (when no material is placed on it).

[0038] Figure 4 This is a schematic diagram of the hot pressing plate of a hot pressing device provided in an embodiment of the present invention;

[0039] Figure 5 This is another schematic diagram of the hot press plate of the hot press device provided in one embodiment of the present invention;

[0040] Figure 6 yes Figure 5 Cross-sectional view at point AA.

[0041] The reference numerals in the accompanying drawings are as follows:

[0042] 10. Hot pressing device; 101. Pressing space;

[0043] 1. Frame; 11. First vacuum door; 12. Second vacuum door; 13. Side panel; 14. Horizontal panel; 15. Vacuum chamber;

[0044] 2. Drive mechanism; 21. Drive component; 22. Moving platform;

[0045] 3. Hot press plate; 3a. First hot press plate; 3b. Second hot press plate; 3c. Third hot press plate; 301. Upper equalization layer; 302. Middle heating layer; 303. Lower equalization layer; 31. Plate body; 311, 311a, 311b. Liquid inlet; 312, 312a, 312b. Liquid outlet; 313. Flow channel; 3131. First sub-flow channel; 3132. Second sub-flow channel; 313a. First flow channel; 313b. Second flow channel; 314. Mounting hole; 32. Heating element;

[0046] 4. First heat insulation component;

[0047] 5. Second heat insulation component;

[0048] 20. Materials;

[0049] z, first direction; m, second direction; n, third direction; x, fourth direction; y, fifth direction. Detailed Implementation

[0050] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0051] like Figures 1 to 6 As shown, the hot pressing device 10 provided in this embodiment of the present invention includes a frame 1, a drive mechanism 2, and a plurality of hot pressing plates 3. The plurality of hot pressing plates 3 are spaced apart along a first direction z on the frame 1, and a pressing space 101 is formed between two adjacent hot pressing plates 3. The drive mechanism 2 is mounted on the frame 1 and is used to drive each hot pressing plate 3 to move closer to or further away from each other.

[0052] The hot press plate 3 includes a plate body 31 and a heating element 32. The plate body 31 is provided with a liquid inlet 311, a liquid outlet 312, and a flow channel 313. The flow channel 313 connects the liquid inlet 311 and the liquid outlet 312 to allow the flow of the heat transfer medium. The heating element 32 is installed on the plate body 31 and is used to heat the plate body 31. While the plate body 31 is heating up, the heat from the plate body 31 can be transferred to the heat transfer medium flowing in the flow channel 313.

[0053] The hot pressing device 10 provided in this embodiment of the present invention includes a heating element 32 and a flow channel 313 for the flow of heat-conducting medium on the hot pressing plate 3. During hot pressing, the material 20 is placed in the pressing space 101 between two adjacent hot pressing plates 3. Through the operation of the heating element 32, the heat-conducting medium in the plate 31 and its flow channel 313 can be rapidly heated to a preset temperature, thereby accelerating the pressing efficiency. Furthermore, compared to the prior art scheme that heats the heat-conducting medium by heating external pipelines, this invention directly installs the heating element 32 on the plate 31 of the hot pressing plate 3, which reduces the limitation of external pipelines on the temperature rise of the heat-conducting medium, thereby achieving a higher heating temperature and meeting the temperature requirements of high-frequency and high-speed circuit board manufacturing.

[0054] In one embodiment, such as Figures 1 to 2 As shown, multiple hot press plates 3 are evenly distributed along the first direction z to ensure that material 20 can be placed between two adjacent hot press plates 3.

[0055] In one embodiment, such as Figures 4 to 6 As shown, the plate 31 is also provided with mounting holes 314, and the heating element 32 is installed in the mounting holes 314 to realize the installation of the heating element 32 on the plate 31.

[0056] In one embodiment, such as Figures 4 to 6As shown, there are two flow channels 313. For easy distinction, the two flow channels 313 are labeled as the first flow channel 313a and the second flow channel 313b, respectively. The first flow channel 313a connects the inlet 311a and the outlet 312a, and the second flow channel 313b connects the inlet 311b and the outlet 312b.

[0057] The flow direction of the heat-conducting medium in the first flow channel 313a is opposite to the flow direction of the heat-conducting medium in the second flow channel 313b.

[0058] By reversing the flow directions of the heat-conducting media within the two flow channels 313, cross-convection of the heat-conducting media within the two flow channels 313 can be achieved, for example, by using... Figure 4 Taking the second direction m as an example, the first flow channel 313a flows from left to right, and the second flow channel 313b flows from right to left. At this time, the temperature of the hot press plate 3 on both sides of the second direction m tends to be more uniform, so that the material 20 is heated more evenly.

[0059] In one embodiment, such as Figures 4 to 6 As shown, along the first direction z, the heating element 32 is located between two flow channels 313, that is, the heating element 32 is located between the first flow channel 313a and the second flow channel 313b.

[0060] like Figure 5 In the indicated direction, the hot press plate 3 can be divided into an upper equalization layer 301, a middle heating layer 302, and a lower equalization layer 303 from top to bottom. The upper equalization layer 301 contains a first flow channel 313a, the lower equalization layer 303 contains a second flow channel 313b, and the middle heating layer 302 is equipped with a heating element 32. The first flow channel 313a in the upper equalization layer 301 and the second flow channel 313b in the lower equalization layer 303 are symmetrically distributed about the middle heating layer 302. Therefore, the temperature of the heating element 32 can be transferred to the heat-conducting medium in the two flow channels 313 more synchronously, resulting in more uniform heating of the material 20.

[0061] In one embodiment, such as Figures 4 to 6 As shown, multiple heating elements 32 are arranged at intervals along the second direction m. The second direction m intersects the first direction z.

[0062] By arranging multiple heating elements 32 at intervals along the second direction m, the heat-conducting medium in the two flow channels 313 is heated from multiple locations, thereby improving the heating efficiency.

[0063] In one embodiment, such as Figure 4As shown, the flow channel 313 includes multiple first sub-flow channels 3131 and second sub-flow channels 3132. The multiple first sub-flow channels 3131 are spaced apart along the second direction m, and adjacent two first sub-flow channels 3131 are connected through a second sub-flow channel 3132, so that the first sub-flow channels 3131 are connected in series. Among the two first sub-flow channels 3131 located at the outermost edge along the second direction m, one is connected to the liquid inlet 311, and the other is connected to the liquid outlet 312.

[0064] Along the second direction m, at least one heating element 32 is provided between two adjacent first sub-channels 3131.

[0065] Each of the first sub-channels 3131 is connected in series. By providing at least one heating element 32 between each pair of adjacent first sub-channels 3131, the two adjacent first sub-channels 3131 are rapidly heated by the heating element 32, thereby improving the hot pressing efficiency.

[0066] In one embodiment, such as Figures 4 to 6 As shown, the first sub-channel 3131 is straight and extends along the third direction n, while the second sub-channel 3132 is arc-shaped. The heating element 32 extends along the third direction n.

[0067] The third direction n, the second direction m, and the first direction z intersect each other.

[0068] At this time, the first sub-channels 3131 of the first channel 313a, the first sub-channels 3131 of the second channel 313b, and the heating elements 32 are arranged parallel to each other to make the material 20 more uniformly heated. Preferably, the first sub-channels 3131 within the same channel 313 can be arranged at equal intervals.

[0069] In one embodiment, such as Figures 4 to 6 As shown, the heating element 32 is an electric heating tube, which achieves rapid heating through electrical control.

[0070] In one embodiment, such as Figures 4 to 6 As shown, the heat transfer medium is oil, which enables heat conduction.

[0071] In one embodiment, the hot pressing device 10 further includes a first pipeline, a second pipeline, a liquid supply mechanism, and a cooling mechanism (not shown in the figure). The liquid supply mechanism is provided with a medium outlet and a medium inlet. The first pipeline is connected between the liquid inlet 311 and the medium outlet, and the second pipeline is connected between the liquid outlet 312 and the medium inlet, thereby realizing the connection between the liquid supply mechanism and the flow channel 313.

[0072] The cooling mechanism is located in the second pipeline and is used to cool the heat-conducting medium in the second pipeline.

[0073] The cooling mechanism can be selected from water cooling, oil cooling, or other suitable cooling methods according to actual needs. This cooling mechanism cools the heat-conducting medium in the second pipeline, enabling it to reduce the equipment temperature to a safe range in a short time, avoiding the slow speed problem of traditional electric heating hot press devices, thereby improving equipment production efficiency.

[0074] In one embodiment, such as Figures 1 to 3 As shown, the plurality of hot press plates 3 include a first hot press plate 3a and a second hot press plate 3b. The first hot press plate 3a is mounted on the frame 1, and the second hot press plate 3b is spaced apart from the first hot press plate 3a along a first direction z. The second hot press plate 3b is connected to the output end of the drive mechanism 2. The drive mechanism 2 is used to drive the second hot press plate 3b to move closer to or further away from the first hot press plate 3a, so as to realize the mutual approach or distance between the second hot press plate 3b and the first hot press plate 3a.

[0075] In one embodiment, such as Figures 1 to 3 As shown, the plurality of hot press plates 3 also include a third hot press plate 3c, which is slidably connected to the frame 1 along the first direction z, and is disposed between the first hot press plate 3a and the second hot press plate 3b along the first direction z.

[0076] By setting a third hot press plate 3c between the first hot press plate 3a and the second hot press plate 3b, multiple pressing spaces 101 are set in the hot press device 10 to achieve synchronous hot pressing of multiple materials 20.

[0077] In one embodiment, such as Figures 1 to 3 As shown, multiple third hot press plates 3c are provided, and the multiple third hot press plates 3c are spaced apart along the first direction z and located between the first hot press plate 3a and the second hot press plate 3b.

[0078] The number of third hot press plates 3c can be adjusted according to actual needs. The more third hot press plates 3c there are, the more pressing space 101 there is in the hot press device 10, and the more materials 20 can be simultaneously hot-pressed; conversely, the fewer the number of third hot press plates 3c there are, the fewer pressing space 101 there is in the hot press device 10, and the fewer materials 20 can be simultaneously hot-pressed.

[0079] In one embodiment, such as Figures 1 to 3 As shown, the hot pressing device 10 also includes a first heat insulation component 4 and a second heat insulation component 5. The first heat insulation component 4 is installed between the first hot pressing plate 3a and the frame 1, and the second heat insulation component 5 is installed between the output end of the drive mechanism 2 and the second hot pressing plate 3b.

[0080] By setting the first heat insulation component 4 and the second heat insulation component 5, the high temperature of the first hot press plate 3a and the second hot press plate 3b is prevented from being transferred to the frame 1 or the drive mechanism 2, thereby avoiding structural strength and accuracy failure of the frame 1 or the drive mechanism 2 due to high temperature. At the same time, the setting of the first heat insulation component 4 and the second heat insulation component 5 can also reduce the heat loss of the first hot press plate 3a and the second hot press plate 3b.

[0081] In one embodiment, such as Figures 1 to 3 As shown, the drive mechanism 2 includes a drive component 21 and a movable platform 22. The drive component 21 is mounted on the frame 1, and the movable platform 22 is connected to the output end of the drive component 21. The drive component 21 is used to drive the movable platform 22 to move along the first direction z.

[0082] The second heat insulation component 5 is installed between the movable platform 22 and the second hot press plate 3b.

[0083] Driven by the drive component 21, the movable platform 22 drives the second heat insulation component 5 and the second hot press plate 3b to move along the first direction z, so that the hot press plates 3 can move closer or further apart from each other.

[0084] The drive component 21 can be a hydraulic cylinder. When the hydraulic cylinder is working, it will generate hundreds of tons of thrust to the movable platform 22 to complete the hydraulic cylinder pressure transmission function.

[0085] In one embodiment, such as Figures 1 to 3 As shown, the frame 1 includes a first vacuum door 11, a second vacuum door 12, two side plates 13, and two horizontal plates 14. The two side plates 13 are spaced apart along the fourth direction x. The two horizontal plates 14 are spaced apart along the first direction z and are respectively connected to the two side plates 13. The drive mechanism 2 is mounted on one of the horizontal plates 14. The first vacuum door 11 and the second vacuum door 12 are spaced apart along the fifth direction y. The first vacuum door 11 is connected to the two side plates 13 and the two horizontal plates 14, and a cavity is formed between the first vacuum door 11 and the two side plates 13 and the two horizontal plates 14.

[0086] The second vacuum door 12 is slidably connected between the two side plates 13, so that the second vacuum door 12 can slide between the closed position of the closed cavity and the open position of the fully open cavity.

[0087] Each hot press plate 3 is placed inside the cavity.

[0088] The fifth direction y, the fourth direction x, and the first direction z are all perpendicular to each other.

[0089] The first vacuum door 11 of the frame 1 is connected to each side plate 13 and each of the two horizontal plates 14 by bolts. The cavity is closed or opened by sliding the second vacuum door 12 between the closed position and the open position. When the cavity is open, the material 20 can be placed into or taken out of the pressing space 101; when the cavity is closed, the material 20 in the pressing space 101 can be heat-pressed.

[0090] In one embodiment, such as Figures 1 to 3 As shown, the frame 1 also includes a vacuum chamber 15, one side of which is connected to two side plates 13 and two horizontal plates 14, and the other side of which is connected to a first vacuum door 11.

[0091] In one embodiment, the frame 1 further includes a door drive mechanism (not shown in the figure), which is installed between two side plates 13. The second vacuum door 12 is connected to the output end of the door drive mechanism so as to drive the second vacuum door 12 to slide between the closed position and the open position through the door drive mechanism.

[0092] The door panel drive mechanism can be selected to use a motor in conjunction with a belt to achieve its drive function.

[0093] In one embodiment, such as Figures 1 to 3 As shown, each hot press plate 3 can be slidably connected to at least one side plate 13 along the first direction z to ensure the movement direction of the hot press plate 3.

[0094] The working principle of the hot pressing device 10 provided in this embodiment of the utility model is as follows:

[0095] (a) Preparation stage, such as Figure 2 As shown, the piston rod of the oil cylinder is not extended. Since the flow channel 313 of the hot press plate 3 inside the hot press device 10 has not been filled with a high-temperature heat-conducting medium, the temperature of the oil cylinder and the frame 1 is below 120 degrees Celsius.

[0096] (ii) Work phase, such as Figure 3 As shown, when the hot pressing device 10 is working, the material 20 is placed on the hot pressing plate 3. At this time, the piston rod of the oil cylinder extends upward under the drive of the hydraulic pump until each hot pressing plate 3 is in contact with the adjacent material 20, and the oil cylinder reaches the system set pressure value. While the oil cylinder is pressurizing, the hot pressing plate 3 is heated by the heat-conducting medium flowing inside it. The cavity of the hot pressing device 10 forms a low vacuum, high temperature, and high pressure environment under the action of the vacuum pump. The material 20 undergoes a chemical cross-linking reaction inside the hot pressing device 10, realizing the tight bonding between the resin and copper foil in the material 20.

[0097] When the hot press plate 3 heats up, a heating command is issued by the control system. The heating element 32 is turned on by the auxiliary relay, and the heating element 32 begins to heat up under the action of current. The heating power is P=I^2*R. The heating element 32 and the hot press plate 3 exchange heat through thermal conduction. To ensure the temperature uniformity of the hot press plate 3, the heat-conducting medium in the two flow channels 313 of the hot press plate 3 begins to circulate at this time, and the flow direction of the heat-conducting medium in the two flow channels 313 of the hot press plate 3 is opposite, so that the hot press plate 3 is heated more evenly as a whole.

[0098] During the heating phase, the circulating heat-conducting medium carries away the heat from the high-temperature areas of the hot press plate 3 and transfers it to the low-temperature areas of the hot press plate 3. During the cooling phase, the heating element 32 stops heating, and the circulating heat-conducting medium carries away the heat transferred from the material 20 to the hot press plate 3 in a timely manner, which is then dissipated through the cooling mechanism.

[0099] The hot pressing device 10 provided in this embodiment of the present invention has the following advantages:

[0100] (1) Increased operating temperature. The electric heating element 32 can achieve a higher operating temperature, meeting the temperature requirements of the 5G and AI industries for high-frequency and high-speed circuit board manufacturing, which has significant advantages over traditional oil-heated hot pressing devices.

[0101] (2) Rapid cooling capability. The cooling mechanism can reduce the equipment temperature to a safe range in a short time, avoiding the problem of slow cooling speed of traditional electric heating hot pressing devices, and significantly improving equipment production efficiency.

[0102] (3) Low equipment cost. The hot pressing device 10 has simple supporting equipment, does not require the configuration of boilers and secondary furnaces, and has a low equipment cost, making it suitable for a wide range of small and medium-sized circuit board factories and reducing the equipment investment costs of enterprises.

[0103] (4) The temperature of the hot platen 3 of the hot pressing device 10 is uniform. The flow direction of the heat-conducting medium in the two flow channels 313 is opposite, which can make the temperature of the hot platen 3 on the left and right sides tend to be balanced.

[0104] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hot pressing device, characterized in that, The device includes a frame, a drive mechanism, and multiple hot press plates, which are spaced apart along a first direction on the frame. The drive mechanism is mounted on the frame and is used to drive the hot press plates to move closer to or further away from each other. The hot press plate includes a plate body and a heating element. The plate body is provided with a liquid inlet, a liquid outlet and a flow channel, and the flow channel connects the liquid inlet and the liquid outlet. The heating element is installed on the plate body and is used to heat the plate body.

2. The hot pressing device according to claim 1, characterized in that, The plate is also provided with mounting holes, and the heating element is installed in the mounting holes.

3. The hot pressing device according to claim 1 or 2, characterized in that, There are two flow channels; The flow directions of the heat-conducting medium in the two channels are opposite.

4. The hot pressing device according to claim 3, characterized in that, Along the first direction, the heating element is located between the two flow channels.

5. The hot pressing device according to claim 1, characterized in that, Multiple heating elements are provided, and the multiple heating elements are spaced apart along the second direction; The second direction intersects with the first direction.

6. The hot pressing device according to claim 4, characterized in that, The flow channel includes a plurality of first sub-flow channels and a second sub-flow channel. The plurality of first sub-flow channels are spaced apart along the second direction. Adjacent two first sub-flow channels are connected through a second sub-flow channel so that each first sub-flow channel is connected in series with the others. Of the two first sub-channels located at the outermost edge along the second direction, one is connected to the inlet and the other is connected to the outlet; Along the second direction, at least one of the heating elements is disposed between two adjacent first sub-channels; The second direction intersects with the first direction.

7. The hot pressing device according to claim 6, characterized in that, The first sub-channel is straight and extends in a third direction, while the second sub-channel is arc-shaped; The heating element extends along the third direction; The third direction, the second direction, and the first direction intersect each other.

8. The hot pressing device according to claim 1, characterized in that, The heating element is an electric heating tube.

9. The hot pressing device according to claim 3, characterized in that, The heat-conducting medium is oil.

10. The hot pressing device according to claim 1, characterized in that, The hot pressing device further includes a first pipeline, a second pipeline, a liquid supply mechanism, and a cooling mechanism. The liquid supply mechanism is provided with a medium outlet and a medium inlet. The first pipeline connects the liquid inlet and the medium outlet, and the second pipeline connects the liquid outlet and the medium inlet. The cooling mechanism is disposed in the second pipeline and is used to cool the heat-conducting medium in the second pipeline.

11. The hot pressing device according to claim 1, characterized in that, The plurality of hot press plates include a first hot press plate and a second hot press plate. The first hot press plate is mounted on the frame. The second hot press plate is spaced apart from the first hot press plate along the first direction and is connected to the output end of the drive mechanism. The drive mechanism is used to drive the second hot press plate to move closer to or away from the first hot press plate.

12. The hot pressing apparatus according to claim 11, characterized in that, The plurality of hot press plates also include a third hot press plate, which is slidably connected to the frame along the first direction and is disposed between the first hot press plate and the second hot press plate along the first direction.

13. The hot pressing apparatus according to claim 12, characterized in that, Multiple third hot press plates are provided, and the multiple third hot press plates are spaced apart along the first direction and located between the first hot press plate and the second hot press plate.

14. The hot pressing apparatus according to claim 11, characterized in that, The hot pressing device further includes a first heat insulation component and a second heat insulation component. The first heat insulation component is installed between the first hot pressing plate and the frame, and the second heat insulation component is installed between the output end of the drive mechanism and the second hot pressing plate.

15. The hot pressing apparatus according to claim 14, characterized in that, The driving mechanism includes a driving component and a movable platform. The driving component is mounted on the frame, and the movable platform is connected to the output end of the driving component. The driving component is used to drive the movable platform to move along the first direction. The second heat insulation component is installed between the movable platform and the second hot press plate.

16. The hot pressing device according to claim 1, characterized in that, The frame includes a first vacuum door, a second vacuum door, two side plates, and two horizontal plates. The two side plates are spaced apart along a fourth direction. The two horizontal plates are spaced apart along a first direction and are respectively connected to the two side plates. The first vacuum door and the second vacuum door are spaced apart along a fifth direction. The first vacuum door is connected to the two side plates and the two horizontal plates, and a cavity is formed between the first vacuum door and the two side plates and the two horizontal plates. The second vacuum door is slidably connected between the two side plates, so that the second vacuum door can slide between a closed position that closes the cavity and an open position that fully opens the cavity; Each of the aforementioned hot press plates is disposed within the cavity; The fifth direction and the fourth direction are perpendicular to each other from the first direction.

17. The hot pressing apparatus according to claim 16, characterized in that, Each of the hot press plates can be slidably connected to at least one of the side plates along the first direction.

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