Multi-material composite machine

Abstract

The present application discloses a multi-material composite machine, including a machine body, and a lower mold and an upper mold installed on the machine body, and a high-frequency generating device is arranged on the machine body; the upper mold includes a high-frequency welding assembly electrically connected to the high-frequency generating device and a mold pressing plate located below the high-frequency welding assembly, and the mold pressing plate includes a heat-conducting template and an electric heating element, and the end of the heat-conducting template away from the high-frequency welding assembly is a working surface, and the electric heating element is located at the other end surface of the heat-conducting template or inside the heat-conducting template. Polymer materials have more electrons, and can be heated by the high-frequency welding assembly. Non-polymer materials are electrically heated by the mold pressing plate during the pressing process. Therefore, two different temperatures can be formed between the upper mold and the lower mold, and the polymer material and the non-polymer material can be melted respectively, thereby realizing the melting connection of the two materials. Among them, the product requirement applicable to this equipment must be that the melting temperature of the polymer material is greater than the melting temperature of the non-polymer material.

Description

Technical Field

[0001] The present application relates to the technical field of thermal composite equipment, and in particular to a multi-material composite machine. Background Art

[0002] At present, the composite methods of flat products are mainly divided into adhesive connection and hot melt connection. Among them, adhesive connection is to set glue between two materials to complete the connection between the two materials. Its advantage is that there is no need to heat the materials and it is not affected by the hot melt temperature of the materials, but its disadvantage is that the connection is not strong enough and the service life is short. It is mainly used in products made of two different materials. Due to the different melting temperatures of different materials, it is impossible to meet the melting state at the same temperature. Although the two materials can melt when the temperature is heated to the high melting temperature, the material with the low melting temperature will usually melt to a liquefied state, which directly leads to the scrapping of the material.

[0003] Hot melt connection is completed by making the two connecting surfaces molten at high temperature. This requires that the melting temperature between the two connecting materials is within a small range. Therefore, it is mainly used for connections between the same materials, and the priority is a firm connection and a long service life.

[0004] Therefore, the current method of compounding two materials with different hot-melt temperatures is mostly through viscose. There are many such products on the current market. For example, the middle layer is made of foam materials such as PE, while the surface layer is made of polymer materials such as PVC, PU, ​​EVA, TPU, etc. At present, such products can only be compounded by viscose, and the product life is generally short. Summary of the invention

[0005] In order to increase the service life of composite products of polymer materials and non-polymer materials, the present application provides a multi-material composite machine.

[0006] In the first aspect, the present application provides a multi-material composite machine, which adopts the following technical solution:

[0007] A multi-material composite machine comprises a machine body, and a lower die and an upper die mounted on the machine body, wherein a high-frequency generating device is arranged on the machine body;

[0008] The upper mold includes a high-frequency welding component electrically connected to a high-frequency generating device and a mold pressing plate located below the high-frequency welding component. The mold pressing plate includes a heat-conducting template and an electric heating element. The end of the heat-conducting template away from the high-frequency welding component is a working surface, and the electric heating element is located on the other end surface of the heat-conducting template or inside the heat-conducting template.

[0009] By adopting the above technical solution, when compounding polymer materials and non-polymer materials, polymer materials have more electrons and can be heated by high-frequency welding components, while non-polymer materials cannot be heated by high frequency due to too few electrons. Therefore, electric heating is performed during the pressing process through the mold pressing plate. Therefore, two different temperatures can be formed between the upper mold and the lower mold, and the polymer material and the non-polymer material can be melted respectively, thereby realizing the fusion connection of the two materials. Among them, the product requirement applicable to this equipment must be that the melting temperature of the polymer material is greater than the melting temperature of the non-polymer material.

[0010] Further preferably, a three-dimensional pattern is arranged on the force-applying surface of the thermal conductive template, an air cavity is arranged in the mold pressing plate, air holes connected to the air cavity are distributed on the working surface of the mold pressing plate, and an air path interface connected to the air cavity is arranged on the thermal conductive template.

[0011] By adopting the above technical solution, the three-dimensional pattern setting can form a three-dimensional print on the product during the compounding process. The air path interface can generate negative pressure by sucking air into the air cavity. Therefore, when the product is welded, the negative pressure on the air cavity can act on the product through the air holes, so that the product can better fit the working surface of the thermal conductive template, and the three-dimensional pattern formed is better and more efficient. In addition, air can also be discharged through the air holes. This setting can help the product to detach when it adheres to the mold due to high temperature after the compounding is completed.

[0012] It is further preferred that: the gas circuit interface is connected to the air pump A through a two-position four-way reversing valve A, the medium inlet and the discharge port of the two-position four-way reversing valve A are respectively connected to the outlet and the inlet of the air pump A, and one of the two medium outlets of the two-position four-way reversing valve A is connected to the gas circuit interface, and the other medium outlet is emptied.

[0013] By adopting the above technical solution, a two-position four-way reversing valve A is used to connect the air pump A, wherein the emptying in the present application refers to connecting with the air. In this way, the reversal of the air circuit can be achieved through the two-position four-way reversing valve A. When the air pump A is working, ventilation or emptying can be formed into the air circuit interface. When emptying, the air circuit interface is an air intake port; therefore, during welding, air can be extracted through the air holes to improve product quality. When taking out the material after the product welding is completed, air can be discharged through the air holes to assist in separating the blanking.

[0014] Further preferably, a plurality of parallel mounting grooves are arranged on the heat-conducting template, two electric heating rods are embedded in each mounting groove, and a wiring groove is arranged on the central symmetric plane of the mounting groove.

[0015] By adopting the above technical solution, the setting cost of the electric heating rod is relatively low, and the wires of the electric heating rod are routed through the wiring groove, which not only facilitates the wiring but also makes the overall heating effect more uniform.

[0016] Further preferably, the installation groove is an air cavity, and the air hole is communicated with the installation groove.

[0017] By adopting the above technical solution, the heat-conducting template has a simple structure and low production cost.

[0018] Further preferably, the high-frequency welding assembly includes a high-frequency electric plate, an insulating plate located on one side of the high-frequency electric plate, and a heat insulation plate located on the other side of the insulating plate, a plurality of cooling channels are arranged in the heat insulation plate, and the cooling channels have two connection ports formed on the heat insulation plate.

[0019] By adopting the above technical solution, a heat insulation board is set on the insulation board for heat insulation, which can reduce the heat generated and transferred to the insulation board. At the same time, a cooling channel is set to provide air, water, coolant and other media for cooling, so that more heat can be blocked to prevent the insulation board from being heated by the mold platen, resulting in reduced insulation and compression deformation. Among them, the insulation board is easily compressed and deformed at high temperature, so that different deformation amounts will appear at each point, resulting in reduced flatness, and then causing a decrease in product precision, resulting in uneven electromotive force and affecting the heating precision of high frequency.

[0020] It is further preferred that the heat insulation board is a manganese alloy steel heat insulation board.

[0021] By adopting the above technical solution, the manganese alloy steel material has good heat resistance, and most importantly, its hardness can be guaranteed, and it has good thermal stability and is not easy to deform under high temperature conditions, thereby better ensuring the accuracy of the entire machine.

[0022] More preferably, the insulating board is made of bakelite or epoxy resin.

[0023] By adopting the above technical solution, neither bakelite nor epoxy resin is conductive, and both have relatively high mechanical strength, and are not prone to deformation during product pressing, which would reduce the accuracy of the equipment. Both have good thermal stability below 60°C, thereby ensuring good processing accuracy during the heating process.

[0024] More preferably, the diameter of the pore is a, wherein 0.2 mm ≤ a ≤ 0.8 mm.

[0025] By adopting the above technical solution, the size of the pores is more appropriate. Since the surface of the product is in a hot melt state, pores larger than 0.8mm will cause part of the surface of the product to be sucked into the pores, resulting in defects on the surface of the product. However, the thermal conductive template is made of aluminum alloy, and the processing cost of pores smaller than 0.2mm is too high.

[0026] More preferably, 0.4 mm ≤ a ≤ 0.5 mm.

[0027] By adopting the above technical solution, the above range value is a better choice, and the pores within this range value are easy to process and will not affect the product.

[0028] It is further preferred that: the two connecting ports of the cooling channel are connected to two ends of a pump station through pipelines respectively.

[0029] By adopting the above technical solution and connecting with the pump station, cooling water or coolant can be passed through the cooling channel and can be circulated.

[0030] It is further preferred that: a two-position four-way reversing valve B for controlling the medium conveying direction in the cooling channel is arranged on the connecting pipe between the heat insulation board and the pump station, and the two-position four-way reversing valve B is controlled to be started intermittently in a certain time circuit.

[0031] By adopting the above technical solution, a two-position four-way reversing valve B is set and controlled by a timing circuit, that is, a reversal is performed within a set time to ensure that the temperature on both sides of the insulation board is relatively uniform.

[0032] It is further preferred that: temperature sensors are arranged on both sides of the insulation board along the axial direction of the cooling channel, and a two-position four-way reversing valve B for controlling the medium conveying direction in the cooling channel is arranged on the connecting pipe between the insulation board and the pump station, and the two-position four-way reversing valve B is controlled by two temperature sensors.

[0033] By adopting the above technical solution, the pump station starts to cool the conveying medium in the cooling channel during use. During the cooling process, two temperature sensors detect the temperatures on both sides of the insulation board in real time, and control the two-position four-way reversing valve B through the changes in the two detected temperature values. For example, a preset value can be set, and whenever the absolute value of the difference between the two detected temperature values ​​is greater than the preset value, the two-position four-way reversing valve B starts to reverse once.

[0034] It is further preferred that: one connection port of the cooling channel is connected to an air pump B, and the other connection port serves as an air outlet.

[0035] By adopting the above technical solution, the air pump B is connected to cool by ventilation in the cooling channel.

[0036] It is further preferred that the medium flow directions of any two adjacent cooling channels are arranged in opposite directions.

[0037] By adopting the above technical solution, the structure is relatively simple, and the temperature difference of each point of the insulation board can be kept within a smaller range without detection and control.

[0038] It is further preferred that the number of cooling channels is set to be an even number.

[0039] By adopting the above technical solution, the temperature of each point on the insulation board is more uniform.

[0040] Further preferably, two vertically arranged hydraulic cylinders are provided on the machine body, and the upper mold is installed on the piston rods of the two hydraulic cylinders; the two hydraulic cylinders are synchronously driven by the same oil pump, and flow control valves are provided on the parallel pipelines of the two hydraulic cylinders, and two distance sensors for detecting the moving distance on both sides of the upper mold are provided on the machine body, and the two flow control valves are controlled by a processing module, which receives the detection data of the two distance sensors, compares them, and outputs a control signal for controlling the two flow control valves.

[0041] By adopting the above technical solution, the upper mold is driven by two hydraulic cylinders, so that the overall operation accuracy of the upper mold can be higher, thereby improving the heating accuracy. The same oil pump can ensure the synchronization of the two hydraulic cylinders, and then adjust the synchronization of the two hydraulic cylinders through two sets of flow control valves and distance sensors. In the automatic control, one distance sensor can be used as a reference value to compare with the detection value of another distance sensor. If the absolute difference between the two values ​​exceeds the set value, a control signal is output according to whether the detection value is greater than or less than the reference value to control the corresponding flow control valve, thereby ensuring that the flatness of the lower mold can be controlled within a reasonable range during the lifting process.

[0042] It is further preferred that four guide posts are arranged between the machine body and the lower die, and the upper die is slidably mounted on the four guide posts.

[0043] By adopting the above technical solution, the arrangement of four guide columns can effectively improve the stability of the upper mold movement and avoid outputting unnecessary control signals due to instability.

[0044] Further preferably, a shielding cover is arranged on the upper mold, the high-frequency electric board, the insulating board and the heat insulation board are all installed in the shielding cover, and the shielding cover is an aluminum shielding cover and is grounded.

[0045] By adopting the above technical solution, the setting of the shielding cover can shield the point signal, and the setting of aluminum can prevent eddy current from being generated on the shielding cover.

[0046] In a second aspect, the present application provides a composite method using a multi-material composite machine, which adopts the following technical solution:

[0047] A composite method using a multi-material composite machine includes firstly energizing an electric heating element for heating for 1-6 seconds, driving an upper mold to move downward and close the mold with a lower mold, and then applying high frequency for 1-6 seconds through a high frequency welding component. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a structural schematic diagram of embodiment 1;

[0049] Figure 2It is a schematic diagram of the oil circuit of the oil cylinder, hydraulic cylinder and flow control valve in the first embodiment;

[0050] Figure 3 It is a schematic diagram of the explosion structure of the lower mold in the first embodiment;

[0051] Figure 4 is a schematic diagram of the oil circuits of the heat insulation board and the pump station in the first embodiment;

[0052] Figure 5 is a schematic diagram of the back structure of the mold pressing plate in Example 1;

[0053] Figure 6 is a schematic diagram of the front structure of the mold pressing plate in the first embodiment;

[0054] Figure 7 It is a simplified diagram of the gas circuit of the gas circuit interface, the two-position four-way reversing valve and the air pump A in the first embodiment;

[0055] Figure 8 It is a schematic diagram of the oil circuit of the heat insulation board and the pump station in the second embodiment;

[0056] Fig. 9 It is a schematic diagram of the oil circuit of the heat insulation board and the pump station in the third embodiment;

[0057] Fig.10 is a simplified diagram of the gas path of the heat insulation board and the air pump B in the fourth embodiment;

[0058] Fig.11 It is a schematic diagram of the front structure of the mold pressing plate in Example 5.

[0059] In the figure, 100, machine body; 110, hydraulic cylinder; 111, oil pump; 112, flow control valve; 120, distance sensor; 130, guide column; 200, upper mold; 210, fixed platform; 220, shielding cover; 230, high-frequency electric board; 240, insulating board; 250, heat insulation board; 251, cooling channel; 260, mold pressing plate; 261, heat-conducting template; 262, electric heating element; 263, air cavity; 264, air hole; 265, air path interface; 266, installation groove; 267, wiring groove; 268, convex rib; 269, connecting groove; 300, lower mold; 400, pump station; 410, two-position four-way reversing valve B; 500, air pump A; 510, two-position four-way reversing valve A; 600, temperature sensor; 700, air pump B. DETAILED DESCRIPTION

[0060] The present application is further described in detail below in conjunction with the accompanying drawings.

[0061] Embodiment 1: A multi-material composite machine, such as Figure 1As shown, the machine body 100, the lower die 300 and the upper die 200, the lower die 300 is fixedly mounted on the machine body 100 and forms a placement platform. Two vertically arranged hydraulic cylinders 110 are mounted on the machine body 100, the upper die 200 is mounted on the piston rods of the two hydraulic cylinders 110, four guide posts 130 are arranged on the machine body 100, and the upper die 200 is slidably mounted on the four guide posts 130.

[0062] Two distance sensors 120 are installed on the body 100 above the upper mold 200. Figure 2 The two hydraulic cylinders 110 are arranged on two parallel oil circuits, and the two hydraulic cylinders 110 are connected in series with the oil pump 111 , and the two flow control valves 112 are respectively installed on the parallel oil circuits of the two hydraulic cylinders 110 .

[0063] The two flow control valves 112 are controlled by a processing module, which receives the detection data of the two distance sensors 120, compares them, and outputs a control signal for controlling the two flow control valves 112. During automatic control, one distance sensor 120 can be used as a reference value to compare with the detection value of the other distance sensor 120. If the absolute difference between the two values ​​exceeds a set value, a control signal is output according to whether the detection value is greater than or less than the reference value to control the corresponding flow control valve 112.

[0064] See attached Figure 1 The upper mold 200 is installed on a fixed platform 210, and the fixed platform 210 is connected to the two hydraulic cylinders 110 and is slidably connected to four guide columns 130.

[0065] like Figure 3 As shown, the upper mold 200 includes a shielding cover 220, a high-frequency welding assembly and a mold pressing plate 260. The shielding cover 220 is fixedly mounted on the fixed platform 210 by bolts, and the high-frequency welding assembly and the mold pressing plate 260 are both located in the shielding cover 220. The mold pressing plate 260 is located below the high-frequency welding assembly. In this embodiment, the high-frequency welding assembly and the mold pressing plate 260 are both connected to the fixed platform 210 by bolts. The shielding cover 220 is an aluminum shielding cover 220 and is grounded.

[0066] The high-frequency welding assembly includes a high-frequency electric plate 230, an insulating plate 240 and a heat-insulating plate 250. The insulating plate 240 is located between the high-frequency electric plate 230 and the heat-insulating plate 250, and the three are mutually opposed. The material of the insulating plate 240 can be bakelite or epoxy resin, which can be determined according to cost and practical needs. In addition, when the size of the product to be produced is large, the insulating plate 240 can be designed with a split structure and installed between the insulating plate 240 and the heat-insulating plate 250 by laying flat.

[0067] The heat insulation board 250 is a manganese alloy steel heat insulation board 250 . A plurality of cooling channels 251 are disposed in the heat insulation board 250 . Two ends of the cooling channels 251 penetrate the heat insulation board 250 to form two connection ports on the heat insulation board 250 .

[0068] like Figure 4 As shown, the two connecting ports of the cooling channel 251 are connected to the two ends of a pump station 400 through pipelines respectively, and a two-position four-way reversing valve B410 for controlling the medium conveying direction in the cooling channel 251 is arranged on the connecting pipeline between the insulation board 250 and the pump station 400. The two-position four-way reversing valve B410 is controlled to be intermittently started in a certain time circuit.

[0069] like Figure 3 As shown, the mold pressing plate 260 includes a heat-conducting template 261 and an electric heating element 262. The heat-conducting template 261 is made of aluminum alloy, and one end surface of the heat-conducting template 261 is a force-applying surface for the product. Figure 5 The electric heating element 262 is a plurality of electric heating rods, and a plurality of parallel mounting grooves 266 are provided on the heat conductive template 261, and two electric heating rods are embedded in each mounting groove 266, and a wiring groove 267 is provided on the central symmetric surface of the mounting groove 266. The wires of the electric heating rods are routed through the wiring groove 267, and a convex rib 268 is provided in the wiring groove 267 to improve the structural strength and smoothness of the heat conductive template 261.

[0070] A three-dimensional pattern is provided on the force-applying surface of the heat-conducting template 261 (not specifically shown in the drawings of this embodiment), and the three-dimensional pattern may be a pattern, a flower shape, a pattern, etc. Figure 6 An air cavity 263 is provided in the thermal conductive template 261, and an air path interface 265 connected to the air cavity 263 is provided on the thermal conductive template 261. In the present embodiment, a plurality of air path interfaces 265 are provided and are evenly distributed on both sides of the thermal conductive template 261, and the air path interfaces 265 are arranged at equal intervals.

[0071] like Figure 7 As shown, the gas circuit interface 265 is connected to the air pump A500 through a two-position four-way reversing valve A510, and the medium inlet and discharge port of the two-position four-way reversing valve A510 are respectively connected to the outlet and inlet of the air pump A500, and one of the two medium outlets of the two-position four-way reversing valve A510 is connected to the gas circuit interface 265, and the other medium outlet is empty, that is, connected to the air.

[0072] like Figure 6 As shown, air holes 264 connected to the air cavity 263 are evenly distributed on the force-applying surface, and the diameter of the air holes 264 is a, wherein 0.2 mm ≤ a ≤ 0.8 mm, preferably 0.4 mm ≤ a ≤ 0.5 mm. In this embodiment, the diameter of the air holes 264 is directly 0.5 mm.

[0073] The air cavity 263 may be formed by producing the heat conductive template 261 separately and then merging and connecting them, or may be integrally formed during a casting process.

[0074] Composite method: First, the electric heating element 262 is powered on for 1-6 seconds to preheat the heat-conducting template 261. The specific heating time can be determined according to the thickness and material of the surface polymer material layer. After preheating, the two hydraulic cylinders 110 are started to drive the upper mold 200 to move down and close the mold with the lower mold 300. After the mold is closed, the high frequency is applied for 1-6 seconds through the high-frequency welding component. The application time of high frequency depends on the material and melting temperature of the polymer material layer. Among them, during the mold closing process, the air pump A500 is started to form a negative pressure in the air cavity 263, and then suction is formed on the air hole 264. After the mold is closed and until the mold is separated, the air hole 264 is kept sucked; when the mold is separated, the two-position four-way reversing valve A510 is started to reverse, so that the air pump A500 inflates the air cavity 263, and finally blows air on the air hole 264 to separate the product from the upper mold.

[0075] Example 2: Figure 8 As shown, the difference from Example 1 is that temperature sensors 600 are arranged on both sides of the heat insulation board 250 along the axial direction of the cooling channel 251. The temperature sensor 600 can be installed on the heat insulation board 250, or an infrared thermal sensor can be used for detection. In this embodiment, the installation on the heat insulation board 250 is taken as an example. A two-position four-way reversing valve for controlling the medium conveying direction in the cooling channel 251 is arranged on the connecting pipe between the heat insulation board 250 and the pump station 400, and the two-position four-way reversing valve is controlled by two temperature sensors 600.

[0076] When in use, the pump station 400 starts to cool the conveying medium in the cooling channel 251. During the cooling process, the two temperature sensors 600 detect the temperatures on both sides of the heat insulation board 250 in real time, and control the two-position four-way reversing valve according to the changes in the two detected temperature values. For example, a preset value can be set, and whenever the absolute value of the difference between the two detected temperature values ​​is greater than the preset value, the two-position four-way reversing valve starts to reverse once.

[0077] Example 3: Fig. 9 As shown, the difference from Example 1 is that no two-position four-way reversing valve is provided in this embodiment, and in this embodiment, the number of cooling channels 251 is set in even number, and the medium flow directions of any two adjacent cooling channels 251 are set in opposite directions.

[0078] Example 4: Fig.10 As shown, the difference from Example 3 is that one connection port of the cooling channel 251 is connected to an air pump B700, and the other connection port serves as an air outlet. The air pump B700 sends air into the cooling channel 251 and then sends it out from the air outlet.

[0079] Example 5: Fig.11 As shown, the difference from the embodiment 1 is that in this embodiment, the mounting groove 266 is used as the air cavity 263, that is, the air hole 264 is provided at the bottom of the mounting groove 266. Figure 5 A plurality of connecting grooves 269 are provided between the installation grooves 266 , and all the wiring grooves 266 are connected through the connecting grooves 269 and the wiring grooves 266 .

[0080] In addition, the connecting groove 269 can also be used to abut against a heating rod, so that the heating rod can abut against the mounting groove 266 to form a better heat conduction effect.

[0081] The connecting groove 269 may also be provided in the first embodiment. When the connecting groove 269 is provided in the first embodiment, it is only used to abut against the heating rod.

[0082] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-material composite machine, characterized by: It comprises a machine body (100), and a lower mold (300) and an upper mold (200) mounted on the machine body (100), wherein a high-frequency generating device is arranged on the machine body (100); The upper mold (200) comprises a high-frequency welding assembly electrically connected to a high-frequency generating device and a mold pressing plate (260) located below the high-frequency welding assembly. The mold pressing plate (260) comprises a heat-conducting template (261) and an electric heating element (262). One end of the heat-conducting template (261) away from the high-frequency welding assembly is a working surface. The electric heating element (262) is located at the other end surface of the heat-conducting template (261) or inside the heat-conducting template (261). A three-dimensional pattern is provided on the force-applying surface of the heat-conducting template (261); an air cavity (263) is provided in the mold pressing plate (260); air holes (264) in communication with the air cavity (263) are distributed on the working surface of the mold pressing plate (260); and an air path interface (265) in communication with the air cavity (263) is provided on the heat-conducting template (261); The gas circuit interface (265) is connected to the air pump A (500) via a two-position four-way reversing valve A (510); the medium inlet and the discharge port of the two-position four-way reversing valve A (510) are respectively connected to the outlet and the inlet of the air pump A (500); one of the two medium outlets of the two-position four-way reversing valve A (510) is communicated with the gas circuit interface (265), and the other medium outlet is emptied; The electric heating element (262) is a plurality of electric heating rods. The heat conductive template (261) is provided with a plurality of installation grooves (266) arranged in parallel. Two electric heating rods are embedded in each installation groove (266). A wiring groove (267) is provided on the central symmetric plane of the installation groove (266). The mounting groove (266) is an air cavity (263), and the air hole (264) is in communication with the mounting groove (266); The high-frequency welding assembly comprises a high-frequency electric plate (230), an insulating plate (240) located on one side of the high-frequency electric plate (230), and a heat insulation plate (250) located on the other side of the insulating plate (240), wherein a plurality of cooling channels (251) are arranged in the heat insulation plate (250), and the cooling channels (251) are formed with two connection ports on the heat insulation plate (250).

2. The multi-material composite machine according to claim 1, characterized in that: The heat insulation board (250) is a manganese alloy steel heat insulation board (250); the material of the insulating board (240) is bakelite or epoxy resin.

3. The multi-material composite machine according to claim 1, characterized in that: Two vertically arranged hydraulic cylinders (110) are arranged on the machine body (100), and the upper die (200) is mounted on the piston rods of the two hydraulic cylinders (110); the two hydraulic cylinders (110) are synchronously driven by the same oil pump (111), and flow control valves (112) are arranged on the parallel pipelines of the two hydraulic cylinders (110); two distance sensors (120) are arranged on the machine body (100) for respectively detecting the moving distances of the two sides of the upper die (200); the two flow control valves (112) are controlled by a processing module, and the processing module receives the detection data of the two distance sensors (120), compares them, and outputs a control signal for controlling the two flow control valves (112).

4. The multi-material composite machine according to claim 1, characterized in that: A shielding cover (220) is arranged on the upper mold (200), and the high-frequency electric plate (230), the insulating plate (240) and the heat insulation plate (250) are all installed in the shielding cover (220). The shielding cover (220) is an aluminum shielding cover (220) and is grounded.

5. A compounding method using the multi-material compounding machine according to any one of claims 1 to 4, characterized in that: First, the electric heating element (262) is energized and heated for 1-6 seconds, and then the upper mold (200) is driven to move downward to close the mold with the lower mold (300), and then a high frequency is applied for 1-6 seconds through a high frequency welding component.

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