An injection molding device for base layer of automobile interior trim panel

Abstract

The invention discloses an injection molding device for a base layer of an automobile interior trim panel, comprising a frame, an injection molding unit, a demoulding unit and a cooling unit, wherein the frame is used to install and fix the injection molding unit, the demoulding unit and the cooling unit, the injection molding unit is used to mold the base material of the automobile interior trim panel, the demoulding unit is used to quickly demould the substrate after molding, and the cooling unit is used to cool the molten material in the injection molding unit to facilitate the rapid molding of the substrate. When the material is melted and extruded into a molding cavity through the injection molding unit, the material in a molten state is quickly cooled and cooled by the cooling unit to make it molded quickly and improve production efficiency. After the substrate is molded, the molded substrate is quickly separated from the injection molding unit by the demoulding unit to avoid low efficiency and product damage caused by manual demoulding.

Description

Technical Field

[0001] The invention relates to the technical field of automobile interior trim panel processing, in particular to an automobile interior trim panel base injection molding device. Background Art

[0002] With the rapid development of electric vehicles, driverless technology and new energy vehicles, lightweight design of automobiles has become an important trend in the industry. Plastics have been widely used in automobile manufacturing due to their light weight, high strength and corrosion resistance, especially in the manufacture of automotive interior parts. Injection molding machine is a professional plastic processing machine. It uses a mold to melt thermoplastic or thermosetting plastics and inject them into the mold cavity. After cooling and solidification, it forms a plastic product with the desired shape and structure. It is an indispensable tool for manufacturing automotive interior panels and other parts.

[0003] During the injection molding process of automotive interior panels, temperature control is an important link to ensure product quality. During the injection molding process, the temperature inside the mold rises rapidly. If it is not cooled down in time and effectively, the plastic material will melt unevenly, affecting the dimensional accuracy and surface quality of the product. After injection molding, how to quickly and safely remove the product from the mold is another problem that needs to be solved. The traditional manual demolding method is not only inefficient, but also has safety hazards and can easily cause product damage.

[0004] Therefore, during the injection molding process of automotive interior panels, temperature control and rapid demoulding become key factors affecting product quality and production efficiency. Summary of the invention

[0005] The object of the present invention is to provide an injection molding device for a base layer of an automobile interior trim panel to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] The described automobile interior trim panel base injection molding device comprises a frame, an injection molding unit, a demoulding unit and a cooling unit. The frame is placed on a horizontal basis. The frame comprises a vertical plate. The vertical plates are two and both of the vertical plates are vertically fixedly mounted on the surface of the frame at one end away from the horizontal basis. The injection molding unit is fixedly mounted on the surface of the frame at one end away from the horizontal basis. The injection molding unit is fixedly connected to the demoulding unit. The demoulding unit has the function of quickly detaching the molded substrate from the injection molding unit. The cooling unit is fixedly mounted on the surface of the frame at one end away from the horizontal basis. The cooling unit is fixedly connected to the injection molding unit.

[0008] The frame is used to install and fix the injection molding unit, the demoulding unit and the cooling unit. The injection molding unit is used for molding the base material of the automobile interior trim panel. The demoulding unit is used for rapid demoulding of the substrate after molding. The cooling unit is used to cool the molten material in the injection molding unit to facilitate rapid molding of the substrate. When the material is melted and extruded into the molding cavity through the injection molding unit, the material in the molten state is quickly cooled and cooled by the cooling unit to make it molded quickly and improve production efficiency. After the substrate is molded, the molded substrate is quickly separated from the injection molding unit by the demoulding unit to avoid inefficiency and product damage caused by manual demoulding.

[0009] Furthermore, the injection molding unit includes a motor, a spiral auger, a melting tube, an electric heating plate, an extrusion tube, a static mold, a dynamic mold, an electric telescopic rod, an air collecting box, a piston, a telescopic joint, a hydraulic push rod, an extrusion plate and a conductive plate. The fixed end of the motor is fixedly mounted on the extension plate at the end of the melting tube, the telescopic end of the motor extends into the interior of the melting tube and is fixedly connected to the spiral auger, the melting tube is fixedly mounted on the surface of one end of the frame away from the horizontal foundation through a straight rod, a feed pipe is provided on the melting tube, an electric heating plate is fixedly mounted on the inner wall of the melting tube, the melt tube discharge port is conductively connected to the extrusion tube parallel to the vertical axis, the extrusion tube discharge port is fixedly connected to the static mold, the static mold is fixedly connected to the vertical plate through a round rod, the fixed end of the electric telescopic rod is vertically fixedly mounted on the surface of the vertical plate, and the movable end of the electric telescopic rod is connected to the dynamic mold. The mold is fixedly connected, the movable mold is fixedly connected to the cooling unit, the air collecting box is fixedly installed on the inner surface of the end of the extrusion tube away from the horizontal foundation, the piston is slidably installed inside the air collecting box, the piston is fixedly connected to the fixed end of the telescopic joint close to the frame, the telescopic end of the telescopic joint passes through the air collecting box and is fixedly connected to the extrusion plate, the extrusion plate is slidably installed inside the extrusion tube, the fixed end of the hydraulic push rod is fixedly installed on the inner surface of the end of the extrusion tube away from the frame, the telescopic end of the hydraulic push rod is fixedly connected to the surface of the end of the extrusion plate away from the frame, there are two conductive plates, one of which is fixedly installed on the lower part of the end face of the movable mold away from the electric telescopic rod, and the other conductive plate is fixedly installed on the lower part of the end face of the static mold close to the movable mold, and is electrically connected to the hydraulic push rod, and the end of the extrusion tube away from the frame is fixedly connected to the demoulding unit.

[0010] When it is necessary to process and form the base layer of the automobile interior trim panel, the controller controls the electric telescopic rod to start and drive the movable mold to move toward the static mold until the movable mold contacts the static mold, and the movable mold and the static mold form a molding cavity. At this time, the two conductive plates are in contact, the circuit is turned on, and the current is transmitted to the hydraulic push rod through the conductive plate to change the current direction of the hydraulic push rod. At this time, the hydraulic push rod extends, and at the same time, when the material to be melted enters the melting tube through the melting tube feed port, the controller controls the electric heating plate to heat the material to melt it. At the same time, the controller controls the motor to start and drive the spiral auger to rotate to transport the molten material to the extrusion tube. At this time, the hydraulic push rod pushes the extrusion plate to move downward, overcomes the attraction between the magnets and pulls the telescopic joint downward, thereby driving the piston to move downward synchronously, and squeezes the molten material at the bottom of the extrusion tube into the molding cavity formed by the movable mold and the static mold to carry out the molding process.

[0011] Furthermore, the demolding unit includes a connecting tube, a rack, a gear, a shifting post, a special-shaped wheel, a sealing plate and a spring, one end of the connecting tube is fixedly connected to the extrusion tube, the connecting tube is conductively connected to the inside of the extrusion tube, the other end of the connecting tube extends into the inner cavity of the static mold and is conductively connected to the static mold, the rack is slidably mounted on the inner wall of the connecting tube, the end of the rack away from the frame is fixedly connected to the piston through a traction rope, the gear is meshed with the rack, the gear is rotatably mounted inside the connecting tube through a round rod, a shifting post is provided on the surface of the gear, the special-shaped wheel is rotatably mounted inside the connecting tube through a round rod, the special-shaped wheel is located below the gear, the sealing plate is rotatably mounted on the inner wall of the connecting tube through a round rod, one end of the spring is fixedly mounted on the inner wall of the connecting tube, and the other end is fixedly mounted on the end face of the sealing plate close to one end of the frame.

[0012] When the extrusion plate drives the piston to move downward through the telescopic joint, the piston pulls the rack to slide upward through the traction rope, thereby driving the meshing gear to rotate, so that the shifting post on the gear rotates synchronously. During the rotation of the shifting post, the special-shaped wheel is shifted, thereby driving the special-shaped wheel to rotate and periodically squeezing the blocking plate, so that the blocking plate compresses the spring and opens the blockage of the connecting pipe, thereby providing a flow channel for the air between the static mold and the film, and entering the air collecting box through the connecting pipe under the action of the pressure difference. When the extrusion plate extrude a certain amount of molten material, the extrusion stops. At this time, the special-shaped wheel no longer extrude the blocking plate, and the blocking plate re-blocks the connecting pipe under the action of the spring restoring force, thereby forming a vacuum ring between the static mold and the film. The adsorption film is tightly attached to the surface of the static mold. When the molded interior panel base needs to be demolded after injection molding, the controller controls the electric telescopic rod to drive the movable mold to move to the right, the two conductive plates are out of contact, and the hydraulic push rod returns to the initial current direction, begins to shrink and drives the extrusion plate to move up, thereby pushing the piston up under the transmission action of the telescopic joint, so that the rack slides downward and, under the action of the gear and the lever, drives the shaped wheel to reverse while squeezing the sealing plate to compress the spring again, thereby opening the channel between the connecting pipe and the static mold cavity again, squeezing out the gas inside the air collecting box and blowing the film again along the connecting pipe, so that the automobile interior panel formed on the outer surface of the film falls off, thereby realizing the rapid demolding of the interior panel base.

[0013] Furthermore, the cooling unit includes a water tank, a water pump, a circulating water pipe and a refrigeration plate. The water tank is fixedly mounted on the outer surface of one end of the frame away from the horizontal foundation. The water pump is placed inside the water tank. One end of the circulating water pipe is fixedly connected to the water pump, and the other end extends into the inner cavity of the movable mold and is fixedly connected to the movable mold. The refrigeration plate is fixedly mounted on the inner wall of the water tank.

[0014] When the movable mold contacts the static mold, the controller controls the water pump to pump out the water in the water tank, and transports it to the movable mold cavity through the circulating water pipe to cool the molten material in the molding cavity, thereby improving the molding efficiency of the interior panel base. The water that has absorbed heat returns to the water tank from the circulating water pipe and is cooled by the refrigeration plate to keep the water in the water tank at a low temperature, thereby continuously cooling the movable mold and ensuring molding efficiency.

[0015] Furthermore, the telescopic joint is composed of a plurality of joint tubes of different diameters, the inner surface of the largest telescopic joint away from the frame is provided with a magnet, the outer surface and inner surface of the next telescopic joint are both provided with magnets, and the polarities of the magnets in the same telescopic joint are opposite.

[0016] In order to facilitate the hydraulic push rod to push the extrusion plate downward, the extrusion plate drives the first telescopic section to move to the maximum length to overcome the attraction of the magnet and stretch the next telescopic section. At the same time, since the polarities of the magnets in the same telescopic section are opposite, the extrusion plate can drive the telescopic section to retract and be stored when it moves upward.

[0017] Furthermore, a layer of high temperature resistant film that can withstand a temperature of 350 degrees is laid on the surface of the static mold, and a plurality of groups of air pipes are arranged on the surface of the static mold.

[0018] In order to allow the gas between the static mold and the film to flow through the air pipe, it is sucked into and discharged into the gas collecting box through the connecting pipe, thereby realizing the rapid demoulding of the base layer of the automobile interior panel. At the same time, the high temperature resistant film is used as an isolation layer to reduce the direct contact between the base layer of the interior panel and the static mold, reduce the risk of mold sticking, and make the demoulding process smoother.

[0019] Furthermore, the special-shaped wheel includes four radially extending grooves, and the grooves are evenly divided on the special-shaped wheel.

[0020] In order to achieve continuous squeezing of the sealing plate during the rotation of the special-shaped wheel, thereby opening the channel and providing a flow path for the gas, it is convenient for the rapid demoulding of the automobile interior trim panel.

[0021] Furthermore, a counterweight is provided at the bottom of the rack.

[0022] In order to achieve the goal that during the demoulding process, the rack slides downward under the action of the counterweight block and drives the gear to reverse, so that the special-shaped wheel reverses to squeeze the sealing plate to open the channel, so that the gas inside the air collecting box re-enters between the static mold and the film, and the car interior panel is pushed out, thereby achieving the effect of rapid demoulding.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention changes the direction of the current of the hydraulic push rod by contacting two conductive plates and conducting the circuit. At this time, the hydraulic push rod extends to push the extrusion plate to move downward, overcomes the attraction between the magnets and pulls the telescopic joint to extend downward, and squeezes the molten material at the bottom of the extrusion tube into the molding cavity formed by the moving mold and the static mold to perform the molding process;

[0024] The present invention enables the conductive plate in the demoulding unit to disengage, and the hydraulic push rod to return to the initial current direction, start to contract and drive the extrusion plate to move up, and push the piston to move up, so that the rack slides downward and, under the action of the gear and the shifting column, drives the shaped wheel to reverse and squeezes the sealing plate compression spring, opens the passage between the connecting pipe and the static mold cavity, squeezes out the gas in the air collecting box and blows the film again along the connecting pipe, so that the automobile interior trim panel after the outer surface of the film is formed falls off, thereby realizing the rapid demoulding of the interior trim panel base layer.

[0025] In the present invention, when the movable mold contacts the static mold in the cooling unit, the controller controls the water pump to pump out the water in the water tank, and transports the water to the movable mold cavity through the circulating water pipe, so as to cool the molten material in the molding cavity. The water after absorbing heat returns to the water tank from the circulating water pipe, and is cooled by the refrigeration plate, so that the water in the water tank is always kept at a low temperature, thereby continuously cooling the movable mold and ensuring the molding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0028] Figure 2 It is a front view structural schematic diagram of the present invention;

[0029] Figure 3 It is a schematic diagram of the top view structure of the present invention;

[0030] Figure 4 The present invention Figure 3 Schematic diagram of the cross-section structure at AA in the middle;

[0031] Figure 5 The present invention Figure 4 The enlarged diagram of the structure at B in the middle;

[0032] Figure 6 It is a schematic diagram of the internal structure of the expansion joint of the present invention;

[0033] Figure 7 It is a schematic diagram of the internal structure of the connecting pipe of the present invention;

[0034] In the figure: 1. frame; 11. vertical plate; 2. injection unit; 21. motor; 22. auger; 23. melting tube; 24. electric heating plate; 25. extrusion tube; 26. static mold; 27. dynamic mold; 28. electric telescopic rod; 29. ​​air collecting box; 210. piston; 211. telescopic joint; 212. hydraulic push rod; 213. extrusion plate; 214. conductive plate; 3. demoulding unit; 31. connecting pipe; 32. rack; 33. gear; 34. lever; 35. special-shaped wheel; 36. sealing plate; 37. spring; 4. cooling unit; 41. water tank; 42. water pump; 43. circulating water pipe; 44. refrigeration plate. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The present invention provides a technical solution:

[0037] like Figure 1 , 2 As shown in Figure 3, an injection molding device for a base layer of an automobile interior trim panel includes a frame 1, an injection molding unit 2, a demoulding unit 3 and a cooling unit 4. The frame 1 is placed on a horizontal basis. The frame 1 includes a vertical plate 11. There are two vertical plates 11. The two vertical plates 11 are vertically fixedly mounted on the surface of the frame 1 at one end away from the horizontal basis. The injection molding unit 2 is fixedly mounted on the surface of the frame 1 at one end away from the horizontal basis. The injection molding unit 2 is fixedly connected to the demoulding unit 3. The demoulding unit 3 has the function of quickly separating the molded substrate from the injection molding unit 2. The cooling unit 4 is fixedly mounted on the surface of the frame 1 at one end away from the horizontal basis. The cooling unit 4 is fixedly connected to the injection molding unit 2.

[0038] The frame 1 is used to install and fix the injection molding unit 2, the demoulding unit 3 and the cooling unit 4. The injection molding unit 2 is used for molding the base material of the automobile interior trim panel. The demoulding unit 3 is used for rapid demoulding of the substrate after molding. The cooling unit 4 is used to cool the molten material in the injection molding unit 2 to facilitate rapid molding of the substrate. When the material is melted and extruded into the molding cavity through the injection molding unit 2, the material in the molten state is rapidly cooled by the cooling unit 4 to enable rapid molding and improve production efficiency. After the substrate is molded, the molded substrate is quickly separated from the injection molding unit 2 by the demoulding unit 3 to avoid inefficiency and product damage caused by manual demoulding.

[0039] like Figure 4 , 56, the injection unit 2 includes a motor 21, a spiral auger 22, a melting tube 23, an electric heating plate 24, an extrusion tube 25, a static mold 26, a dynamic mold 27, an electric telescopic rod 28, an air collecting box 29, a piston 210, a telescopic joint 211, a hydraulic push rod 212, an extrusion plate 213 and a conductive plate 214. The fixed end of the motor 21 is fixedly mounted on the extension plate at the end of the melting tube 23, and the telescopic end of the motor 21 extends into the melting tube 23 and is fixedly connected to the spiral auger 22. The melting tube 2 3 is fixedly mounted on the surface of one end of the frame 1 away from the horizontal foundation through a straight rod, a feed pipe is arranged on the melting tube 23, an electric heating plate 24 is fixedly mounted in the inner wall of the melting tube 23, a discharge port of the melting tube 23 is conductively connected to an extrusion tube 25 parallel to the vertical axis, a discharge port of the extrusion tube 25 is fixedly connected to a static mold 26, the static mold 26 is fixedly connected to the vertical plate 11 through a round rod, a fixed end of an electric telescopic rod 28 is vertically fixedly mounted on the surface of the vertical plate 11, and a movable end of the electric telescopic rod 28 is connected to a movable mold 27 is fixedly connected, the movable mold 27 is fixedly connected to the cooling unit 4, the air collecting box 29 is fixedly installed on the inner surface of the end of the extrusion tube 25 away from the horizontal foundation, the piston 210 is slidably installed in the air collecting box 29, the piston 210 is fixedly connected to the fixed end of the telescopic joint 211 near the frame 1, the telescopic end of the telescopic joint 211 passes through the air collecting box 29 and is fixedly connected to the extrusion plate 213, the extrusion plate 213 is slidably installed in the extrusion tube 25, the fixed end of the hydraulic push rod 212 is fixedly installed on the inner surface of the end of the extrusion tube 25 away from the frame 1, the telescopic end of the hydraulic push rod 212 is fixedly connected to the surface of the end of the extrusion plate 213 away from the frame 1, there are two conductive plates 214, one of which is fixedly installed on the lower part of the end face of the movable mold 27 away from the electric telescopic rod 28, and the other conductive plate 214 is fixedly installed on the lower part of the end face of the static mold 26 close to the movable mold 27, and is electrically connected to the hydraulic push rod 212, and the end of the extrusion tube 25 away from the frame 1 is fixedly connected to the demoulding unit 3.

[0040] When it is necessary to process and form the base layer of the automobile interior trim panel, the controller controls the electric telescopic rod 28 to start and drive the movable mold 27 to move toward the static mold 26 until the movable mold 27 contacts the static mold 26, and the movable mold 27 and the static mold 26 form a molding cavity. At this time, the two conductive plates 214 contact, the circuit is turned on, and the current is transmitted to the hydraulic push rod 212 through the conductive plate 214, changing the current direction of the hydraulic push rod 212. At this time, the hydraulic push rod 212 extends out. At the same time, when the material to be melted passes through the feed port of the melting tube 23 and enters the melting tube 23, the controller controls the electric heating plate 24 to heat the material to melt it. At the same time, the controller controls the motor 21 to start and drive the spiral auger 22 to rotate and transport the molten material to the extrusion tube 25. At this time, the hydraulic push rod 212 pushes the extrusion plate 213 to move downward, overcomes the attraction between the magnets and pulls the telescopic joint 211 to extend downward, thereby driving the piston 210 to move downward synchronously, and extruding the molten material at the bottom of the extrusion tube 25 into the molding cavity formed by the movable mold 27 and the static mold 26 to carry out the molding process.

[0041] like Figure 4 , 7 As shown, the demoulding unit 3 includes a connecting tube 31, a rack 32, a gear 33, a shifting post 34, a special-shaped wheel 35, a blocking plate 36 and a spring 37. One end of the connecting tube 31 is fixedly connected to the extrusion tube 25, and the connecting tube 31 is conductively connected to the inside of the extrusion tube 25. The other end of the connecting tube 31 extends into the inner cavity of the static mold 26 and is conductively connected to the static mold 26. The rack 32 is slidably mounted on the inner wall of the connecting tube 31. The end of the rack 32 away from the frame 1 is fixedly connected to the piston 210 through a traction rope. The gear 33 is meshed with the rack 32. The gear 33 is rotatably mounted inside the connecting tube 31 through a round rod. A shifting post 34 is provided on the surface of the gear 33. The special-shaped wheel 35 is rotatably mounted inside the connecting tube 31 through a round rod. The special-shaped wheel 35 is located below the gear 33. The blocking plate 36 is rotatably mounted on the inner wall of the connecting tube 31 through a round rod. One end of the spring 37 is fixedly mounted on the inner wall of the connecting tube 31, and the other end is fixedly mounted on the end surface of the blocking plate 36 close to one end of the frame 1.

[0042] When the extrusion plate 213 drives the piston 210 to move downward through the telescopic joint 211, the piston 210 pulls the rack 32 to slide upward through the traction rope, thereby driving the gear 33 meshing therewith to rotate, so that the lever 34 on the gear 33 rotates synchronously, and the lever 34 rotates during the rotation of the special-shaped wheel 35, thereby driving the special-shaped wheel 35 to rotate and periodically squeeze the blocking plate 36, so that the blocking plate 36 compresses the spring 37 and opens the blockage of the connecting pipe 31, thereby providing a flow channel for the air between the static mold 26 and the film, and enters the air collecting box 29 through the connecting pipe 31 under the action of the pressure difference. When the extrusion plate 213 extrude a certain amount of molten material, the extrusion stops. At this time, the special-shaped wheel 35 no longer extrude the blocking plate 36, and the blocking plate 36 re-blocks the connecting pipe 31 under the action of the restoring force of the spring 37, so that the static mold 26 and the film A vacuum environment is formed between the two surfaces, and the adsorption film is tightly attached to the surface of the static mold 26. When the molded interior panel base needs to be demolded after injection molding, the controller controls the electric telescopic rod 28 to drive the movable mold 27 to move to the right, and the two conductive plates 214 are disengaged, and the hydraulic push rod 212 returns to the initial current direction, begins to shrink and drives the extrusion plate 213 to move upward, thereby pushing the piston 210 upward under the transmission action of the telescopic joint 211, so that the rack 32 slides downward and, under the action of the gear 33 and the lever 34, drives the shaped wheel 35 to reverse while squeezing the blocking plate 36 to compress the spring 37 again, thereby opening the passage between the connecting pipe 31 and the static mold 26 cavity again, squeezing the gas inside the air collecting box 29 and blowing the film again along the connecting pipe 31, so that the automobile interior panel after molding on the outer surface of the film falls off, thereby realizing the rapid demolding of the interior panel base.

[0043] like Figure 1 , 4 As shown, the cooling unit 4 includes a water tank 41, a water pump 42, a circulating water pipe 43 and a refrigeration plate 44. The water tank 41 is fixedly mounted on the outer surface of one end of the frame 1 away from the horizontal foundation. The water pump 42 is placed inside the water tank 41. One end of the circulating water pipe 43 is fixedly connected to the water pump 42, and the other end extends into the inner cavity of the movable mold 27 and is fixedly connected to the movable mold 27. The refrigeration plate 44 is fixedly mounted on the inner wall of the water tank 41.

[0044] When the movable mold 27 contacts the static mold 26, the controller controls the water pump 42 to pump out the water in the water tank 41, and transports it to the cavity of the movable mold 27 through the circulating water pipe 43, so as to cool the molten material in the molding cavity and improve the molding efficiency of the interior panel base. The water after absorbing heat returns to the water tank 41 from the circulating water pipe 43, and is cooled by the refrigeration plate 44 to keep the water in the water tank 41 at a low temperature at all times, thereby continuously cooling the movable mold 27 and ensuring the molding efficiency.

[0045] like Figure 6As shown, the telescopic joint 211 is composed of multiple joint tubes of different diameters. A magnet is provided on the inner surface of the end of the largest telescopic joint 211 away from the frame 1, and magnets are provided on the outer and inner surfaces of the next telescopic joint 211. The polarities of the magnets in the same telescopic joint 211 are opposite.

[0046] In order to facilitate the hydraulic push rod 212 to push the extrusion plate 213 to move downward, the extrusion plate 213 can drive the first telescopic joint 211 to move to the maximum length to overcome the attraction of the magnet and stretch the next telescopic joint 211. At the same time, since the polarities of the magnets in the same telescopic joint 211 are opposite, the extrusion plate 213 can drive the telescopic joint 211 to retract and be stored when it moves upward.

[0047] like Figure 4 As shown, a layer of high temperature resistant film that can withstand a temperature of 350 degrees is laid on the surface of the static mold 26, and multiple groups of air pipes are arranged on the surface of the static mold 26.

[0048] In order to allow the gas between the static mold 26 and the film to flow through the air pipe, it is sucked into and discharged into the gas collecting box 29 through the connecting pipe 31, thereby realizing the rapid demolding of the base layer of the automobile interior panel. At the same time, the high-temperature resistant film serves as an isolation layer, which reduces the direct contact between the base layer of the interior panel and the static mold 26, reduces the risk of mold sticking, and makes the demolding process smoother.

[0049] like Figure 7 As shown, the special-shaped wheel 35 includes four radially extending grooves, and the grooves are evenly divided on the special-shaped wheel 35.

[0050] In order to realize the continuous squeezing of the blocking plate 36 during the rotation of the special-shaped wheel 35, the channel is opened to provide a flow path for the gas, so as to facilitate the rapid demoulding of the automobile interior trim panel.

[0051] like Figure 7 As shown, a counterweight is provided at the bottom of the rack 32 .

[0052] In order to achieve that during the demolding process, the rack 32 slides downward under the action of the counterweight block and drives the gear 33 to reverse, so that the shaped wheel 35 reverses to squeeze the blocking plate 36 to open the channel, so that the gas inside the air collecting box 29 re-enters between the static mold 26 and the film, and the automobile interior panel is pushed out, thereby achieving the effect of rapid demolding.

[0053] Working principle of the present invention:

[0054] When it is necessary to process and form the base layer of the automobile interior trim panel, the controller controls the electric telescopic rod 28 to start and drive the movable mold 27 to move toward the static mold 26 until the movable mold 27 contacts the static mold 26, and the movable mold 27 and the static mold 26 form a molding cavity. At this time, the two conductive plates 214 contact, the circuit is turned on, and the current is transmitted to the hydraulic push rod 212 through the conductive plate 214, changing the current direction of the hydraulic push rod 212. At this time, the hydraulic push rod 212 extends out. At the same time, when the material to be melted passes through the feed port of the melting tube 23 and enters the melting tube 23, the controller controls the electric heating plate 24 to heat the material to melt it. At the same time, the controller controls the motor 21 to start and drive the spiral auger 22 to rotate and transport the molten material to the extrusion tube 25. At this time, the hydraulic push rod 212 pushes the extrusion plate 213 to move downward, overcomes the attraction between the magnets and pulls the telescopic joint 211 to extend downward, thereby driving the piston 210 to move downward synchronously, and extruding the molten material at the bottom of the extrusion tube 25 into the molding cavity formed by the movable mold 27 and the static mold 26 to carry out the molding process.

[0055] When the extrusion plate 213 drives the piston 210 to move downward through the telescopic joint 211, the piston 210 pulls the rack 32 to slide upward through the traction rope, thereby driving the gear 33 meshing therewith to rotate, so that the lever 34 on the gear 33 rotates synchronously, and the lever 34 rotates during the rotation of the special-shaped wheel 35, thereby driving the special-shaped wheel 35 to rotate and periodically squeeze the blocking plate 36, so that the blocking plate 36 compresses the spring 37 and opens the blockage of the connecting pipe 31, thereby providing a flow channel for the air between the static mold 26 and the film, and enters the air collecting box 29 through the connecting pipe 31 under the action of the pressure difference. When the extrusion plate 213 extrude a certain amount of molten material, the extrusion stops. At this time, the special-shaped wheel 35 no longer extrude the blocking plate 36, and the blocking plate 36 re-blocks the connecting pipe 31 under the action of the restoring force of the spring 37, so that the static mold 26 and the film A vacuum environment is formed between the two surfaces, and the adsorption film is tightly attached to the surface of the static mold 26. When the molded interior panel base needs to be demolded after injection molding, the controller controls the electric telescopic rod 28 to drive the movable mold 27 to move to the right, and the two conductive plates 214 are disengaged, and the hydraulic push rod 212 returns to the initial current direction, begins to shrink and drives the extrusion plate 213 to move upward, thereby pushing the piston 210 upward under the transmission action of the telescopic joint 211, so that the rack 32 slides downward and, under the action of the gear 33 and the lever 34, drives the shaped wheel 35 to reverse while squeezing the blocking plate 36 to compress the spring 37 again, thereby opening the passage between the connecting pipe 31 and the static mold 26 cavity again, squeezing the gas inside the air collecting box 29 and blowing the film again along the connecting pipe 31, so that the automobile interior panel after molding on the outer surface of the film falls off, thereby realizing the rapid demolding of the interior panel base.

[0056] When the movable mold 27 contacts the static mold 26, the controller controls the water pump 42 to pump out the water in the water tank 41, and transports it to the cavity of the movable mold 27 through the circulating water pipe 43, so as to cool the molten material in the molding cavity and improve the molding efficiency of the interior panel base. The water after absorbing heat returns to the water tank 41 from the circulating water pipe 43, and is cooled by the refrigeration plate 44 to keep the water in the water tank 41 at a low temperature at all times, thereby continuously cooling the movable mold 27 and ensuring the molding efficiency.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An injection molding device for a base layer of an automobile interior trim panel, characterized in that: The device for injection molding a base layer of an automobile interior trim panel comprises a frame (1), an injection molding unit (2), a demoulding unit (3) and a cooling unit (4); the frame (1) is placed on a horizontal foundation; the frame (1) comprises a vertical plate (11); there are two vertical plates (11); the two vertical plates (11) are both vertically fixedly mounted on a surface of the frame (1) at one end away from the horizontal foundation; the injection molding unit (2) is fixedly mounted on a surface of the frame (1) at one end away from the horizontal foundation; the injection molding unit (2) is fixedly connected to the demoulding unit (3); the demoulding unit (3) has the function of quickly separating a molded substrate from the injection molding unit (2); the cooling unit (4) is fixedly mounted on a surface of the frame (1) at one end away from the horizontal foundation; the cooling unit (4) is fixedly connected to the injection molding unit (2); The injection molding unit (2) comprises a motor (21), a spiral auger (22), a melting tube (23), an electric heating plate (24), an extrusion tube (25), a static mold (26), a dynamic mold (27), an electric telescopic rod (28), an air collecting box (29), a piston (210), a telescopic joint (211), a hydraulic push rod (212), an extrusion plate (213) and a conductive plate (214); the fixed end of the motor (21) is fixedly mounted on an extension plate at the end of the melting tube (23); the telescopic end of the motor (21) extends into the interior of the melting tube (23) and is fixedly connected to the spiral auger (22); the melting tube (23) is fixedly mounted on the surface of one end of the frame (1) away from the horizontal base through a straight rod, a feed pipe is arranged on the melting tube (23), an electric heating plate (24) is fixedly mounted in the inner wall of the melting tube (23), the discharge port of the melting tube (23) is conductively connected to an extrusion tube (25) parallel to the vertical axis, the discharge port of the extrusion tube (25) is fixedly connected to a static mold (26), the static mold (26) is fixedly connected to the vertical plate (11) through a round rod, the fixed end of the electric telescopic rod (28) is vertically fixedly mounted on the surface of the vertical plate (11), and the movable end of the electric telescopic rod (28) is connected to the movable end of the electric telescopic rod (28). The movable mold (27) is fixedly connected to the cooling unit (4), the air collecting box (29) is fixedly installed on the inner surface of the end of the extrusion tube (25) away from the horizontal base, the piston (210) is slidably installed inside the air collecting box (29), the end of the piston (210) close to the frame (1) is fixedly connected to the fixed end of the telescopic joint (211), the telescopic end of the telescopic joint (211) passes through the air collecting box (29) and is fixedly connected to the extrusion plate (213), the extrusion plate (213) is slidably installed inside the extrusion tube (25), and the fixed end of the hydraulic push rod (212) is fixedly connected to the extrusion tube (25). The hydraulic push rod (212) is installed on the inner surface of the end of the extrusion tube (25) away from the frame (1). The telescopic end of the hydraulic push rod (212) is fixedly connected to the surface of the end of the extrusion plate (213) away from the frame (1). There are two conductive plates (214), one of which is fixedly installed on the lower part of the end surface of the movable mold (27) away from the electric telescopic rod (28), and the other conductive plate (214) is fixedly installed on the lower part of the end surface of the static mold (26) close to the movable mold (27) and is electrically connected to the hydraulic push rod (212). The end of the extrusion tube (25) away from the frame (1) is fixedly connected to the demoulding unit (3).

2. The automobile interior panel base injection molding device according to claim 1, characterized in that: The demoulding unit (3) comprises a connecting tube (31), a rack (32), a gear (33), a shifting post (34), a shaped wheel (35), a blocking plate (36) and a spring (37); one end of the connecting tube (31) is fixedly connected to the extrusion tube (25); the connecting tube (31) is conductively connected to the inside of the extrusion tube (25); the other end of the connecting tube (31) extends into the inner cavity of the static mold (26) and is conductively connected to the static mold (26); the rack (32) is slidably mounted on the inner wall of the connecting tube (31); the end of the rack (32) away from the frame (1) is fixedly connected to the piston (210) through a traction rope The gear (33) is meshed with the rack (32), the gear (33) is rotatably mounted inside the connecting tube (31) via a round rod, a shifting post (34) is provided on the surface of the gear (33), the special-shaped wheel (35) is rotatably mounted inside the connecting tube (31) via a round rod, the special-shaped wheel (35) is located below the gear (33), the blocking plate (36) is rotatably mounted on the inner wall of the connecting tube (31) via a round rod, one end of the spring (37) is fixedly mounted on the inner wall of the connecting tube (31), and the other end is fixedly mounted on the end surface of the blocking plate (36) close to one end of the frame (1).

3. The automobile interior trim panel base injection molding device according to claim 1, characterized in that: The cooling unit (4) comprises a water tank (41), a water pump (42), a circulating water pipe (43) and a refrigeration plate (44); the water tank (41) is fixedly mounted on the outer surface of one end of the frame (1) away from the horizontal base; the water pump (42) is placed inside the water tank (41); one end of the circulating water pipe (43) is fixedly connected to the water pump (42); the other end extends into the inner cavity of the movable mold (27) and is fixedly connected to the movable mold (27); and the refrigeration plate (44) is fixedly mounted on the inner wall of the water tank (41).

4. The automobile interior trim panel base injection molding device according to claim 1, characterized in that: The telescopic joint (211) is composed of a plurality of joint tubes of different diameters. A magnet is arranged on the inner surface of one end of the largest telescopic joint (211) away from the frame (1). Magnets are arranged on both the outer surface and the inner surface of the next telescopic joint (211). The polarities of the magnets in the same telescopic joint (211) are opposite.

5. The automobile interior trim panel base injection molding device according to claim 1, characterized in that: The surface of the static mold (26) is paved with a layer of high temperature resistant film that can withstand a temperature of 350 degrees, and the surface of the static mold (26) is provided with a plurality of groups of air pipes.

6. The automobile interior panel base injection molding device according to claim 2, characterized in that: The special-shaped wheel (35) comprises four grooves extending radially, and the grooves are evenly divided on the special-shaped wheel (35).

7. The automobile interior panel base injection molding device according to claim 2, characterized in that: A counterweight block is arranged at the bottom of the rack (32).

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