CN214448590U - Multi-material compounding machine - Google Patents

Abstract

The application discloses a multi-material compound machine, which comprises a machine body, a lower die and an upper die, wherein the lower die and the upper die are arranged on the machine body; the upper die comprises a high-frequency welding component electrically connected with the high-frequency generation device and a die pressing plate located below the high-frequency welding component, the die pressing plate comprises a heat conduction template and an electric heating piece, one end, far away from the high-frequency welding component, of the heat conduction template is a working surface, and the electric heating piece is located on the other end face of the heat conduction template or in the heat conduction template. The electron of macromolecular material is many, can realize the heating through high frequency welded assembly, and non-macromolecular material passes through the mould clamp plate and carries out electrical heating at the pressfitting in-process, consequently, can form two kinds of different temperatures between last mould and lower mould, can melt macromolecular material and non-macromolecular material respectively to realize the melting of two materials and connect, wherein, the product requirement that this equipment was suitable for must be that macromolecular material's melting temperature is greater than non-macromolecular material's melting temperature.

Description

Multi-material compounding machine

Technical Field

The application relates to the technical field of thermal compounding equipment, in particular to a multi-material compounding machine.

Background

The composite mode of the existing plane product is mainly divided into adhesive connection and hot melt connection, wherein the adhesive connection is realized by arranging glue between two materials and completing the connection between the two materials through the glue. The melting temperature of different materials is different, so that the melting state can not be met at the same time at one temperature, and although the two materials can be melted when the temperature is heated to the melting temperature with high temperature, the material with low melting temperature can be melted to the liquefied state usually, so that the material is directly scrapped.

The hot melt connection is completed by enabling the two connection surfaces to be in a molten state at a high temperature, which requires that the melting temperature between the two connection materials is in a smaller range, so that the hot melt connection is mainly applied to connection between the same materials, and is preferably firm in connection and long in service life.

Therefore, at present, the compounding mode between two materials with different hot melting temperatures is mostly carried out in a viscose mode, and a plurality of products are available in the existing market, for example, the middle layer is made of foaming materials such as PE, and the surface layer is made of high polymer materials such as PVC, PU, EVA, TPU, and the like, at present, the products can be compounded only in the viscose mode, and the service life of the products is generally short.

SUMMERY OF THE UTILITY MODEL

In order to improve the life of macromolecular material and non-macromolecular material's composite product, this application provides a many materials compounding machine.

In a first aspect, the application provides a multi-material compound machine, which adopts the following technical scheme:

a multi-material compound machine comprises a machine body, a lower die and an upper die which are arranged on the machine body, wherein a high-frequency generating device is arranged on the machine body;

the upper die comprises a high-frequency welding component electrically connected with the high-frequency generation device and a die pressing plate located below the high-frequency welding component, the die pressing plate comprises a heat conduction template and an electric heating piece, one end, far away from the high-frequency welding component, of the heat conduction template is a working surface, and the electric heating piece is located on the other end face of the heat conduction template or in the heat conduction template.

Through adopting above-mentioned technical scheme, when compounding macromolecular material and non-macromolecular material, because macromolecular material's electron is many, consequently it can realize heating through high frequency welding subassembly, but non-macromolecular material is because the electron is too few, can't be heated by high frequency, consequently, carry out electrical heating at the pressfitting in-process through the mould clamp plate, consequently, can form two kinds of different temperatures between last mould and lower mould, can melt macromolecular material and non-macromolecular material respectively, thereby realize the melt connection of two materials, wherein, the product requirement that this equipment is suitable for must be that macromolecular material's melting temperature is greater than non-macromolecular material's melting temperature.

More preferably: the heat conducting template is provided with a stereo pattern on the force application surface, an air cavity is arranged in the mold pressing plate, air holes communicated with the air cavity are distributed on the working surface of the mold pressing plate, and an air channel interface communicated with the air cavity is arranged on the heat conducting template.

By adopting the technical scheme, the three-dimensional patterns can form three-dimensional printing on the product in the composite process. And the gas circuit interface can produce the negative pressure to the internal suction of air cavity, consequently the negative pressure on the air cavity can act on the product through the gas pocket when the product welds to make the product can be better with the working face laminating of heat conduction template, the space pattern effect of formation is better, and efficiency is higher. In addition, air can be discharged through the air holes, and the setting can help the detachment when the product is adhered to the mould due to high temperature after the compounding is completed.

More preferably: the air path interface is connected with the air pump A through a two-position four-way reversing valve A, a medium inlet and a medium outlet of the two-position four-way reversing valve A are respectively connected with an outlet and an inlet of the air pump A, one of two medium outlets of the two-position four-way reversing valve A is communicated with the air path interface, and the other medium outlet is emptied.

By adopting the technical scheme, the two-position four-way reversing valve A is connected with the air pump A, wherein evacuation in the application refers to communication with air, so that the air path can be reversed through the two-position four-way reversing valve A, when the air pump A works, air can be introduced into or evacuated from an air path interface, and the air path interface is an air suction port during evacuation; therefore, the air holes can be used for exhausting air to improve the product quality during welding, and the air holes can be used for exhausting air to assist in separation and blanking during material taking after the welding of the product is finished.

More preferably: the heat conducting template is provided with a plurality of mounting grooves which are arranged in parallel, each mounting groove is embedded with two electric heating rods, and the central symmetry plane of each mounting groove is provided with a wiring groove.

Through adopting above-mentioned technical scheme, the cost of setting up that adopts the electric bar is lower, and the electric wire of electric bar walks the line through the trough, not only walks the line convenience, and holistic heating effect can be comparatively even.

More preferably: the mounting groove is an air cavity, and the air hole is communicated with the mounting groove.

By adopting the technical scheme, the heat conduction template is simple in structure and low in production cost.

More preferably: the high-frequency welding component comprises a high-frequency electric plate, an insulating plate positioned on one side of the high-frequency electric plate and a heat insulating plate positioned on the other side of the insulating plate, wherein a plurality of cooling channels are arranged in the heat insulating plate, and two connectors are formed on the heat insulating plate by the cooling channels.

Through adopting above-mentioned technical scheme, set up a heat insulating board on the insulation board and carry out the thermal barrier, can reduce the heat transfer that produces to the insulation board on, simultaneously, set up medium such as cooling channel air feed, water, coolant liquid again and cool off through coming to can fall more thermal barriers, avoid the insulation board to be heated by the mould clamp plate and lead to insulating nature to reduce and the condition appearance that the pressurized deformation appears. Wherein, the insulation board is easy to be pressed and deformed under the high temperature state to the condition that the deformation amount of each point is different appears, causes the roughness to descend, and then arouses the product precision to descend, thereby causes the uneven heating precision that influences the high frequency of electromotive force.

More preferably: the heat insulation plate is a manganese alloy steel heat insulation plate.

By adopting the technical scheme, the manganese alloy steel has good heat resistance, the hardness of the manganese alloy steel can be guaranteed, the manganese alloy steel has good thermal stability, and the manganese alloy steel is not easy to deform at high temperature, so that the precision of the whole machine can be better guaranteed.

More preferably: the insulating plate is made of bakelite or epoxy resin.

By adopting the technical scheme, the bakelite or the epoxy resin are not conductive, and the mechanical strength of the bakelite or the epoxy resin is higher, so that the bakelite or the epoxy resin is not easy to deform during product pressing to reduce the precision of equipment, and the thermal stability of the bakelite or the epoxy resin is better at a temperature below 60 ℃, so that the good processing precision can be ensured in the heating process.

More preferably: the diameter of the air hole is a, wherein a is more than or equal to 0.2mm and less than or equal to 0.8 mm.

By adopting the technical scheme, the size of the air holes is proper, and the air holes exceeding 0.8mm can cause the surface part of the product to be sucked into the air holes to cause the surface of the product to form flaws due to the fact that the surface of the product is in a hot melting state. The heat-conducting template is made of aluminum alloy, and the processing cost of the air holes smaller than 0.2mm is too high.

More preferably: a is more than or equal to 0.4mm and less than or equal to 0.5 mm.

By adopting the technical scheme, the range value is a better choice, the air holes in the range value are easy to process, and the product is not influenced.

More preferably: two connectors of the cooling channel are respectively connected with two ends of a pump station through pipelines.

Through adopting above-mentioned technical scheme, be connected with the pump station, realize leading to cooling water or coolant liquid to the cooling channel to can realize recycling.

More preferably: and a two-position four-way reversing valve B for controlling the medium conveying direction in the cooling channel is arranged on a connecting pipeline between the heat insulation plate and the pump station, and the two-position four-way reversing valve B is controlled by a timing circuit to be started discontinuously.

By adopting the technical scheme, the two-position four-way reversing valve B is arranged and controlled by the timing circuit, namely, one-time reversing is carried out within set time, and the temperature at two sides of the heat insulation plate is ensured to be uniform.

More preferably: temperature sensors are arranged on two sides of the heat insulation plate along the axial direction of the cooling channel, a two-position four-way reversing valve B for controlling the medium conveying direction in the cooling channel is arranged on a connecting pipeline of the heat insulation plate and the pump station, and the two-position four-way reversing valve B is controlled by the two temperature sensors.

By adopting the technical scheme, the pump station is started to convey a medium into the cooling channel for cooling during use, the two temperature sensors detect the temperatures of the two sides of the heat insulation plate in real time in the cooling process, and the two-position four-way reversing valve B is controlled by the change of the two detected temperature values. For example, by setting a preset value, the two-position four-way reversing valve B starts to reverse once every time the absolute value of the difference between the two detected temperature values is greater than the preset value.

More preferably: one connecting port of the cooling channel is connected with an air pump B, and the other connecting port of the cooling channel is used as an air outlet.

Through adopting above-mentioned technical scheme, connect air pump B and cool off through ventilating in the cooling passage.

More preferably: the medium flowing directions of any two adjacent cooling channels are opposite.

By adopting the technical scheme, the structure is simpler, and the temperature difference of each point of the heat insulation plate can be kept within a smaller range without detection and control.

More preferably: the number of cooling channels is arranged in an even number.

By adopting the technical scheme, the temperature of each point on the heat insulation plate is more uniform.

More preferably: the machine body is provided with two vertically arranged hydraulic cylinders, and the upper die is arranged on piston rods of the two hydraulic cylinders; the two hydraulic cylinders are synchronously driven by the same oil pump, flow control valves are arranged on parallel pipelines of the two hydraulic cylinders, two distance sensors which are respectively used for detecting the moving distance of the two sides of the upper die are arranged on the machine body, the two flow control valves are controlled by a processing module, and the processing module receives the detection data of the two distance sensors, compares the detection data and outputs a control signal for controlling the two flow control valves.

By adopting the technical scheme, the upper die is driven by the two hydraulic cylinders, so that the overall operation precision of the upper die can be higher, and the heating precision is improved. The hydraulic control system is driven by the same oil pump, the synchronism of the two hydraulic cylinders can be guaranteed, and then the synchronization of the two hydraulic cylinders is adjusted through the two sets of flow control valves and the two distance sensors, wherein when the hydraulic control system is automatically adjusted, one distance sensor can be used as a reference value to be compared with a detection value of the other distance sensor, if the absolute difference of the two values exceeds a set value, a control signal is output according to the detection value which is greater than or less than the reference value to control the corresponding flow control valve, and therefore the smoothness of the lower die in the lifting process can be controlled within a reasonable range.

More preferably: four guide posts are arranged between the machine body and the lower die, and the upper die is installed on the four guide posts in a sliding mode.

Through adopting above-mentioned technical scheme, the stability that the mould removed in can effectual improvement is gone up in the setting of four guide posts, avoids exporting unnecessary control signal because unstable.

More preferably: the upper die is provided with a shielding cover, the high-frequency electric plate, the insulating plate and the heat insulating plate are all arranged in the shielding cover, and the shielding cover is an aluminum shielding cover and is arranged in parallel.

Through adopting above-mentioned technical scheme, the setting of shield cover can shield point signal, and the setting of aluminium system can avoid the vortex to produce on the shield cover simultaneously.

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

a compounding method using a multi-material compounding machine comprises the steps of firstly electrifying an electric heating piece for heating for 1-6 seconds, then driving an upper die to move downwards to be matched with a lower die, and applying high-frequency waves for 1-6 seconds through a high-frequency welding assembly.

Drawings

FIG. 1 is a schematic structural diagram of the first embodiment;

FIG. 2 is a schematic diagram of oil passages of an oil cylinder, a hydraulic cylinder and a flow control valve in the first embodiment;

FIG. 3 is a schematic view showing an exploded structure of a lower die in the first embodiment;

FIG. 4 is a schematic diagram of the oil circuit of the diaphragm and pump station in the first embodiment;

FIG. 5 is a schematic diagram of a back side structure of a die platen according to an embodiment;

FIG. 6 is a schematic diagram of a front view of a mold platen according to an embodiment;

FIG. 7 is a schematic diagram of the gas path interface, two-position, four-way reversing valve, and gas pump A of the first embodiment;

FIG. 8 is a schematic diagram of oil passages of the heat insulating plate and the pump station in the second embodiment;

FIG. 9 is a schematic diagram of oil passages of a third intermediate heat-insulating plate and a pump station of the embodiment;

FIG. 10 is a schematic view of the gas circuit of the four heat insulating panels and the gas pump B of the embodiment;

FIG. 11 is a schematic front view of a fifth embodiment of a mold platen.

In the figure, 100, the machine body; 110. a hydraulic cylinder; 111. an oil pump; 112. a flow control valve; 120. a distance sensor; 130. a guide post; 200. an upper die; 210. a fixed platform; 220. a shield case; 230. a high frequency electric plate; 240. an insulating plate; 250. a heat insulation plate; 251. a cooling channel; 260. pressing a mold plate; 261. a heat conducting template; 262. an electric heating element; 263. an air cavity; 264. air holes; 265. a gas path interface; 266. mounting grooves; 267. a wiring groove; 268. a rib; 269. a communicating groove; 300. a lower die; 400. a pump station; 410. a two-position four-way reversing valve B; 500. an air pump A; 510. a two-position four-way reversing valve A; 600. a temperature sensor; 700. an air pump B.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

Example 1: a multi-material compound machine is shown in figure 1, a machine body 100, a lower die 300 and an upper die 200, wherein the lower die 300 is fixedly arranged on the machine body 100 and forms a placing platform. Two vertically arranged hydraulic cylinders 110 are installed on the machine body 100, the upper die 200 is installed on 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 installed on the four guide posts 130.

Two distance sensors 120 are installed on the machine body 100 above the upper die 200, referring to fig. 2, two hydraulic cylinders 110 are installed on two parallel oil paths, and the two hydraulic cylinders 110 are both connected in series with an oil pump 111, and two flow control valves 112 are respectively installed on the parallel oil paths of the two hydraulic cylinders 110.

The two flow control valves 112 are controlled by a processing module, which receives the detection data of the two distance sensors 120, compares the detection data, and outputs a control signal for controlling the two flow control valves 112. In the automatic control, one distance sensor 120 may be used as a reference value to be compared with a detection value of another distance sensor 120, and if an absolute difference between the two values exceeds a set value, a control signal may be output to control a corresponding one of the flow control valves 112 according to whether the detection value is greater than or less than the reference value.

Referring to fig. 1, the upper mold 200 is mounted on a fixed platform 210, and the fixed platform 210 is connected to the two hydraulic cylinders 110 and slidably connected to the four guide posts 130.

As shown in fig. 3, 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 fixing 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, both the high frequency welding assembly and the mold pressing plate 260 are connected with the fixing platform 210 through bolts in the embodiment, and the shielding case 220 is an aluminum shielding case 220 and is grounded.

The high-frequency welding assembly comprises a high-frequency electric plate 230, an insulating plate 240 and a heat insulation plate 250, wherein the insulating plate 240 is located between the high-frequency electric plate 230 and the heat insulation plate 250 and is mutually abutted, the insulating plate 240 can be made of bakelite or epoxy resin, and the material can be determined according to cost and practical requirements. Moreover, when the size of the product to be produced is large, the insulating plate 240 may be designed in a split structure and installed between the insulating plate 240 and the insulating plate 250 in a tiled manner.

The heat insulation plate 250 is a manganese alloy steel heat insulation plate 250, a plurality of cooling channels 251 are arranged in the heat insulation plate 250, and two ends of the cooling channels 251 penetrate through the heat insulation plate 250 to form two connecting ports on the heat insulation plate 250.

As shown in fig. 4, two connection ports of the cooling channel 251 are respectively connected to two ends of a pump station 400 through pipes, a two-position four-way reversing valve B410 for controlling the medium conveying direction in the cooling channel 251 is disposed on a connection pipe between the heat insulation plate 250 and the pump station 400, and the two-position four-way reversing valve B410 is controlled by a timing circuit to be intermittently started.

As shown in fig. 3, the mold platen 260 includes a heat conductive mold plate 261 and an electric heating element 262, the heat conductive mold plate 261 is made of aluminum alloy, and an end surface of one end of the heat conductive mold plate 261 is a force application surface for the product. Referring to fig. 5, the electric heating elements 262 are a plurality of electric heating rods, a plurality of parallel installation grooves 266 are formed in the heat conducting template 261, two electric heating rods are embedded in each installation groove 266, and a wiring groove 267 is formed in a central symmetry plane of each installation groove 266. The electric wires of the electric heating rods are routed through the wiring grooves 267, and the convex ribs 268 are arranged in the wiring grooves 267 to improve the structural strength and the use flatness of the heat-conducting template 261.

A three-dimensional pattern (not specifically shown in the drawings of this embodiment) is disposed on the force application surface of the heat conduction template 261, and the three-dimensional pattern may be a line, a flower, a pattern, or the like. Referring to fig. 6, an air cavity 263 is disposed in the heat conducting template 261, and a plurality of air path interfaces 265 are disposed on the heat conducting template 261 and are communicated with the air cavity 263, in this embodiment, the air path interfaces 265 are disposed in a plurality and are uniformly distributed on two sides of the heat conducting template 261, and the air path interfaces 265 are disposed at equal intervals.

As shown in fig. 7, the air path interface 265 is connected to the air pump a500 through a two-position four-way reversing valve a510, a medium inlet and a medium outlet of the two-position four-way reversing valve a510 are respectively connected to an outlet and an inlet of the air pump a500, one of the two medium outlets of the two-position four-way reversing valve a510 is communicated with the air path interface 265, and the other medium outlet is arranged in an emptying manner, that is, communicated with air.

As shown in FIG. 6, air holes 264 communicating with the air cavity 263 are uniformly distributed on the force application surface, the diameter of the air holes 264 is a, wherein a is more than or equal to 0.2mm and less than or equal to 0.8mm, preferably more than or equal to 0.4mm and less than or equal to 0.5mm, and the diameter of the air holes 264 is directly 0.5 mm.

The air cavity 263 may be formed by separately producing the heat conductive template 261 and then combining and connecting the heat conductive template, or may be integrally formed in a casting process.

The compounding method comprises the following steps: the electric heating element 262 is electrified and heated for 1-6 seconds to preheat the heat conducting template 261, the specific heating time can be determined according to the thickness and the material of the surface polymer material layer, after preheating is completed, the two hydraulic cylinders 110 are started to drive the upper die 200 to move downwards to be matched with the lower die 300, after matching is completed, high frequency is applied for 1-6 seconds through the high frequency welding assembly, and the time for applying the high frequency is determined according to the material and the melting temperature of the polymer material layer. During mold closing, the air pump A500 is started to enable the air cavity 263 to form negative pressure, air suction is further formed on the air hole 264, and the air hole 264 is kept to suck air after mold closing until mold splitting; during mold opening, 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 air blowing is formed on the air hole 264, and the product is separated from the upper mold.

Example 2: as shown in fig. 8, the difference from embodiment 1 is that temperature sensors 600 are disposed on both sides of the heat shield 250 along the axial direction of the cooling channel 251, and the temperature sensors 600 may be mounted on the heat shield 250 or may be detected by infrared heat sensors, and in this embodiment, the temperature sensors are mounted on the heat shield 250 as an example. A two-position four-way reversing valve for controlling the medium conveying direction in the cooling channel 251 is arranged on a connecting pipeline between the heat insulation plate 250 and the pump station 400, and the two-position four-way reversing valve is controlled by the two temperature sensors 600.

When the heat insulation plate is used, the pump station 400 is started to convey media into the cooling channel 251 for cooling, the two temperature sensors 600 detect the temperatures of the two sides of the heat insulation plate 250 in real time in the cooling process, and the two-position four-way reversing valve is controlled through the change of the two detected temperature values. For example, a preset value can be set, and the two-position four-way reversing valve starts to reverse once when the absolute value of the difference value of the two detected temperature values is larger than the preset value.

Example 3: as shown in fig. 9, the difference from embodiment 1 is that a two-position four-way selector valve is not provided in this embodiment, the number of cooling passages 251 is doubled in this embodiment, and the medium flow directions of any two adjacent cooling passages 251 are opposite.

Example 4: as shown in fig. 10, the difference from embodiment 3 is that one connection port of the cooling channel 251 is connected to an air pump B700, and the other connection port is used as an air outlet, and the air pump B700 sends air into the cooling channel 251 and then sends the air out from the air outlet.

Example 5: as shown in fig. 11, the difference from embodiment 1 is that the mounting groove 266 is used as the air chamber 263 in this embodiment, that is, the air hole 264 is provided at the bottom of the mounting groove 266. Referring to fig. 5, a plurality of communication grooves 269 are provided between the mounting grooves 266, and all the routing grooves 266 are communicated with each other through the communication grooves 269 and the routing grooves 266.

In addition, the setting of intercommunication groove 269 can also be used for propping up and establish the heating rod, makes the heating rod can contradict with mounting groove 266, forms better heat-conduction effect.

The communication groove 269 may be provided in example 1, and the communication groove 269 is used only for abutting against the heating rod when provided in example 1.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. A multi-material compound machine is characterized in that: comprises a machine body (100), a lower die (300) and an upper die (200) which are arranged on the machine body (100), and a high frequency generating device is arranged on the machine body (100);

go up mould (200) including the high frequency welding subassembly of being connected with the high frequency generating device electricity and be located the mould clamp plate (260) of high frequency welding subassembly below, mould clamp plate (260) include heat conduction template (261) and electric heat spare (262), and the one end that high frequency welding subassembly was kept away from in heat conduction template (261) is the working face, and electric heat spare (262) are located another terminal surface or heat conduction template (261) of heat conduction template (261).

2. A multi-material compounding machine according to claim 1, wherein: the mold comprises a heat conduction template (261), wherein a three-dimensional pattern is arranged on a force application surface of the heat conduction template (261), an air cavity (263) is arranged in a mold pressing plate (260), air holes (264) communicated with the air cavity (263) are distributed on a working surface of the mold pressing plate (260), and an air channel interface (265) communicated with the air cavity (263) is arranged on the heat conduction template (261).

3. A multi-material compounding machine according to claim 2, wherein: the air path interface (265) is connected with the air pump A (500) through a two-position four-way reversing valve A (510), a medium inlet and a medium outlet of the two-position four-way reversing valve A (510) are respectively connected with an outlet and an 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 air path interface (265), and the other medium outlet is emptied.

4. A multi-material compounding machine according to claim 2, wherein: the electric heating elements (262) are a plurality of electric heating rods, a plurality of mounting grooves (266) which are arranged in parallel are arranged on the heat conduction template (261), two electric heating rods are embedded in each mounting groove (266), and wiring grooves (267) are formed in the centrosymmetric plane of each mounting groove (266).

5. The multi-material compound machine according to claim 4, wherein: the mounting groove (266) is an air cavity (263), and the air hole (264) is communicated with the mounting groove (266).

6. A multi-material compounding machine according to claim 1, wherein: the high-frequency welding assembly comprises a high-frequency electric plate (230), an insulating plate (240) positioned on one side of the high-frequency electric plate (230) and a heat insulating plate (250) positioned on the other side of the insulating plate (240), wherein a plurality of cooling channels (251) are arranged in the heat insulating plate (250), and two connecting ports are formed on the heat insulating plate (250) of the cooling channels (251).

7. The multi-material compound machine according to claim 6, wherein: the heat insulation plate (250) is a manganese alloy steel heat insulation plate (250); the insulating plate (240) is made of bakelite or epoxy resin.

8. A multi-material compounding machine according to claim 1, wherein: the machine body (100) is provided with two vertically arranged hydraulic cylinders (110), and the upper die (200) is arranged on piston rods of the two hydraulic cylinders (110); the two hydraulic cylinders (110) are synchronously driven by the same oil pump (111), flow control valves (112) are arranged on parallel pipelines of the two hydraulic cylinders (110), two distance sensors (120) which are respectively used for detecting the moving distances of the two sides of the upper die (200) are arranged on the machine body (100), the two flow control valves (112) are controlled by a processing module, and the processing module receives detection data of the two distance sensors (120), compares the detection data and outputs a control signal for controlling the two flow control valves (112).

9. A multi-material compounding machine according to claim 3, wherein: a shielding cover (220) is arranged on the upper die (200), the high-frequency electric plate (230), the insulating plate (240) and the heat insulating plate (250) are all installed in the shielding cover (220), and the shielding cover (220) is an aluminum shielding cover (220) and is arranged in a grounding mode.

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