Automobile Interior Part Low-Pressure Injection Molding Auxiliary Device

Abstract

The present invention relates to the technical field of low-pressure injection molding, and specifically to a low-pressure injection molding auxiliary device for automobile interior decoration parts, comprising a machine body, a fixed mold and a movable mold, wherein the bottom of the fixed mold is fixedly connected to the top of the machine body, and the movable mold can be vertically movably installed on the machine body, and also comprises a skin flattening component, a pressure stabilizing component and a hydraulic cylinder, wherein the skin flattening component comprises a shell, a plurality of telescopic columns and a plurality of clamping mechanisms, the top of the shell is fixedly connected to the top wall of the machine body, and the telescopic columns can be horizontally rotatably installed on the shell. In order to flatten the skin, the present invention clamps and fixes the four corners of the skin by clamping blocks, and the movable mold presses the skin into the interior of the fixed mold and fits with its bottom wall during the mold closing process. At this time, the four corners of the skin are close to each other, and the rebound force of the thrust spring provides a pulling force to the skin away from the fixed mold, so that the skin remains flat during the injection molding process, deformation of the molded automobile interior decoration parts is prevented, and the yield rate of low-pressure injection molding is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of low-pressure injection molding, and particularly relates to an auxiliary device for low-pressure injection molding of automotive interior parts. Background Art

[0002] The low-pressure injection process is a packaging technology that uses a relatively low pressure (0.15 - 4 mpa) to inject molten material into a mold and quickly solidify it. Through the excellent sealing performance and excellent physical and chemical properties of the hot-melt material, functions such as insulation, heat resistance, shock resistance, vibration resistance, moisture resistance, waterproofing, dustproofing, and chemical corrosion resistance are achieved, which has a good protective effect on electronic components.

[0003] The process of the low-pressure injection molding process is generally as follows: First, the skin is pre-placed in the mold, then the mold is closed, and the moving mold is used to press the skin into the fixed mold for shaping. Then, with the thrust of the screw, the molten plastic in the plasticized state is injected into the closed mold cavity, and finally, the product is obtained after curing and shaping. The material used for the low-pressure injection molding skin can be cloth or PVC fabric. Currently, this process has been widely used in the production of automotive interior parts products such as automotive door trim panels, pillar trim panels, and parcel shelf trim panels.

[0004] In the existing low-pressure injection molding process, when performing the mold closing operation, it is not convenient to flatten the skin. When the moving mold moves to squeeze the skin, due to the relatively soft material of the skin, it is easy to deform, resulting in the deformation of the injection-molded automotive interior parts and reducing the qualified rate. Moreover, during the injection molding process, too much skin tension will cause an increase in the internal pressure of the mold, affecting the injection molding quality. Summary of the Invention

[0005] The purpose of the present invention is to provide an auxiliary device for low-pressure injection molding of automotive interior parts, which can flatten the skin and eliminate the tension on the surface of the skin during injection molding, improving the injection molding effect.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Provided is a low-pressure injection molding auxiliary device for automotive interior decoration parts, comprising a machine body, a fixed mold and a movable mold, wherein the bottom of the fixed mold is fixedly connected to the top of the machine body, the movable mold can be vertically moved and installed on the machine body, and also comprises a skin flattening component, a pressure stabilizing component and a hydraulic cylinder, the skin flattening component comprises a shell, a plurality of telescopic columns and a plurality of clamping mechanisms, the top of the shell is fixedly connected to the top wall of the machine body, the telescopic column can be horizontally rotatably installed on the shell, the telescopic column comprises a sleeve, a U-shaped slide rod and a pair of thrust springs, one end of the U-shaped slide rod passes through the sleeve and is slidably connected to the sleeve, the thrust spring is sleeved on the outer periphery of the U-shaped slide rod, and one end of the thrust spring is fixedly connected to the sleeve A penetrating fan-shaped groove is provided at the four corners of the top of the machine body, and the clamping mechanism can be horizontally movably arranged in the fan-shaped groove. The clamping mechanism includes a base and a pair of clamping blocks. The base is fixedly connected to the other end of the U-shaped slide bar, and the other end of the thrust spring is fixedly connected to the base. The bottom of one of the clamping blocks is fixedly connected to the top of the base, and one end of the other clamping block is hinged to the end of the base away from the shell. The teeth on the two clamping blocks interfere with each other. A pressure stabilizing assembly is installed on the machine body. The pressure stabilizing assembly is used to maintain the pressure in the lower mold stable. The top of the hydraulic cylinder is fixedly connected to the top wall of the machine body, and the telescopic end of the hydraulic cylinder is fixedly connected to the top of the movable mold.

[0008] Preferably, the clamping mechanism also includes a rotating shaft and a pair of torsion springs, the rotating shaft is rotatably connected to the inner wall of the base, the top clamping block is rotatably connected to the outer periphery of the rotating shaft, the torsion spring is sleeved on the outer periphery of the rotating shaft, one end of the torsion spring is fixedly connected to one side of the top clamping block, and the other end of the torsion spring is fixedly connected to the inner wall of the base.

[0009] Preferably, the epidermis flattening assembly also includes a pair of angle adjustment mechanisms, which are symmetrically arranged in the shell, and the angle adjustment mechanisms include a pair of gears, a pair of racks, a connecting plate and a plurality of first return springs. The gear is fixedly connected to the periphery of the other end of the sleeve, the gear is rotatably connected to the inner wall of the shell, the gear and the rack are meshed with each other, the two sides of the connecting plate are respectively fixedly connected to the two racks, the connecting plate is slidably connected to the inner wall of the shell, one end of the first return spring is fixedly connected to the connecting plate, and the other end of the first return spring is fixedly connected to the inner wall of the shell.

[0010] Preferably, the surface flattening assembly also includes a hydraulic rod and a push block, one end of the hydraulic rod is fixedly connected to the inner wall of the shell, the telescopic end of the hydraulic rod is fixedly connected to one side of the push block, both ends of the push block and the opposite ends of the two connecting plates are inclined structures and conflict with each other.

[0011] Preferably, the pressure stabilizing assembly includes a fixed frame, a support frame, a pair of support rods and a pair of tension springs. One side of the fixed frame is fixedly connected to the support frame. The support rods are fixedly connected to the inner wall of the machine body. Both ends of the support frame are slidably connected to the outer periphery of the two support rods respectively. The tension springs are sleeved on the outer periphery of the support rods. One end of the tension spring is fixedly connected to the bottom of the support frame, and the other end of the tension spring is fixedly connected to the top wall of the machine body. When the moving die is separated from the fixed die, the fixed frame is separated from the top of the machine body. When the moving die abuts against the fixed die, the fixed frame is located outside the fixed die, and the bottom of the fixed frame abuts against the top of the machine body.

[0012] Preferably, the pressure stabilizing assembly further includes a U-shaped block, a pair of telescopic rods and a pair of second return springs. One side of the telescopic rod is fixedly connected to the inner wall of the machine body, and the telescopic end of the telescopic rod is fixedly connected to one side of the U-shaped block. The second return springs are sleeved on the outer periphery of the telescopic rods. One end of the second return spring is fixedly connected to the U-shaped block, and the other end of the second return spring is fixedly connected to the inner wall of the machine body. The support frame passes through the machine body and is slidably connected thereto. The other side bottom of the U-shaped block passes through the support frame and is in snap-fit connection therewith. One side of the top of the U-shaped block passes through the side wall of the machine body and is slidably connected thereto.

[0013] Preferably, the pressure stabilizing assembly further includes a bracket and a roller. One side of the bracket is fixedly connected to the top of the moving die, and the roller is rotatably connected to the inner wall of the other side of the bracket. One side of the top of the U-shaped block is of an arc structure, and the roller abuts against the top of the U-shaped block.

[0014] Preferably, a pair of rotating grooves are formed at the four corners of the bottom of the fixed frame, and the two rotating grooves communicate with each other. A round rod is fixedly connected to the inner wall of the rotating groove, and a sector plate is rotatably connected to the outer periphery of the round rod. When the fixed frame is separated from the top of the machine body, the sector plate is in a vertical state. When the bottom of the fixed frame abuts against the top of the machine body, the sector plate is in an inclined state.

[0015] Preferably, a T-shaped plate is fixedly connected to the bottom of the bracket. The bracket is located between the inner walls of the support frame, and the top of the T-shaped plate abuts against the bottom of the support frame.

[0016] Advantages of the present invention:

[0017] 1. When the present invention performs low-pressure injection molding, the skin is laid flat on the top of the fixed die, and the four corners of the skin are clamped and fixed by the clamping mechanism. Then, the hydraulic cylinder drives the moving die to move downward, and the skin is pressed into the fixed die during the mold closing process and fits against its bottom wall. At this time, the four corners of the skin approach each other, the telescopic columns shorten and the thrust springs are compressed. The resilience of the thrust springs provides a pulling force in the direction away from the fixed die to the skin, so that the skin remains flat during the injection molding process, which can prevent the injection-molded automotive interior parts from deforming and improve the yield rate of low-pressure injection molding.

[0018] 2. Before the raw material is injected into the fixed mold, the tension provided by the rebound of the tension spring enables the support frame to drive the fixed frame to slide down along the support rod, and the fixed frame moves to the bottom and contacts the top of the machine body, so that the skin can be clamped. The fixed frame is located outside the fixed mold, so that the skin inside the fixed frame is not affected by the tension of the clamping mechanism, thereby ensuring the stability of the injection pressure inside the fixed mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 .

[0021] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 .

[0022] Figure 3 It is a schematic diagram of the body structure of the present invention.

[0023] Figure 4 It is a cross-sectional view of the machine body structure of the present invention.

[0024] Figure 5 yes Figure 4 A magnified view of the structure at center.

[0025] Figure 6 The epidermis flattening component structure of the present invention is enlarged Figure 1 .

[0026] Figure 7 The epidermis flattening component structure of the present invention is enlarged Figure 2 .

[0027] Figure 8 It is a disassembled diagram of the telescopic column structure of the present invention.

[0028] Figure 9 It is a disassembled diagram of the clamping mechanism structure of the present invention.

[0029] Figure 10 yes Figure 4 A magnified view of the structure at point B.

[0030] Figure 11 The pressure stabilization component structure of the present invention is split Figure 1 .

[0031] Figure 12It is the structural disassembly of the pressure stabilizing component of the present invention Figure 2 .

[0032] In the figure:

[0033] 1. Body; 10. Sector-shaped groove; 11. Fixed mold; 12. Movable mold; 13. Hydraulic cylinder

[0034] 2. Epidermis flattening component; 20. Housing; 21. Telescopic column; 210. Sleeve; 211. U-shaped sliding rod; 212. Thrust spring; 22. Clamping mechanism; 220. Base; 221. Clamping block; 222. Rotating shaft; 223. Torsion spring; 23. Angle adjustment mechanism; 230. Gear; 231. Rack; 232. Connecting plate; 233. First return spring; 24. Hydraulic rod; 25. Pushing block

[0035] 3. Pressure stabilizing component; 30. Fixed frame; 300. Rotating groove; 301. Round rod; 302. Sector plate; 31. Support frame; 32. Support rod; 33. Pulling spring; 34. U-shaped clamping block; 35. Telescopic rod; 36. Second return spring; 37. Bracket; 370. Roller; 371. T-shaped plate Specific embodiments

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific embodiments

[0037] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and cannot be understood as a limitation to this patent; in order to better illustrate the embodiments of the present invention, some components in the accompanying drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted

[0038] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation to this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances

[0039] In the description of the present invention, unless otherwise clearly defined and limited, if terms such as "connection" are used to indicate the connection relationship between components, such terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] As Figures 1 to 12 shown:

[0041] Low-pressure injection molding auxiliary device for automotive interior parts, including a machine body 1, a fixed mold 11 and a movable mold 12. The bottom of the fixed mold 11 is fixedly connected to the top of the machine body 1. The movable mold 12 is installed on the machine body 1 so as to be vertically movable. The driving assembly drives the movable mold 12 to move up and down, so that it fits and separates from the fixed mold 11, thereby performing mold opening and closing, and injection molding can be completed. It also includes a skin flattening assembly 2, a pressure stabilizing assembly 3 and a hydraulic cylinder 13. The skin flattening assembly 2 includes a housing 20, a plurality of telescopic columns 21 and a plurality of clamping mechanisms 22. The top of the housing 20 is fixedly connected to the top wall of the machine body 1. The telescopic columns 21 are installed on the housing 20 so as to be horizontally rotatable. The telescopic column 21 includes a sleeve 210, a U-shaped slide rod 211 and a pair of thrust springs 212. One end of the U-shaped slide rod 211 passes through the sleeve 210 and is slidably connected thereto. The thrust spring 212 is sleeved around the U-shaped slide rod 211. One end of the thrust spring 212 is fixedly connected to the sleeve 210. Fan-shaped grooves 10 are formed through at the four corners of the top of the machine body 1. The clamping mechanisms 22 are arranged in the fan-shaped grooves 10 so as to be horizontally movable. The clamping mechanism 22 includes a base 220 and a pair of clamping blocks 221. The base 220 is fixedly connected to the other end of the U-shaped slide rod 211. The other end of the thrust spring 212 is fixedly connected to the base 220. The bottom of one of the clamping blocks 221 is fixedly connected to the top of the base 220. One end of the other clamping block 221 is hinged to the end of the base 220 away from the housing 20. The teeth on the two clamping blocks 221 are in contact with each other. The pressure stabilizing assembly 3 is installed on the machine body 1. The pressure stabilizing assembly 3 is used to keep the pressure in the lower mold stable. The top of the hydraulic cylinder 13 is fixedly connected to the top wall of the machine body 1. The telescopic end of the hydraulic cylinder 13 is fixedly connected to the top of the movable mold 12. When performing low-pressure injection molding, the skin is laid flat on the top of the fixed mold 11, and the four corners of the skin are placed in the clamping mechanisms 22. The four corners of the skin are clamped and fixed by the clamping blocks 221. Subsequently, the hydraulic cylinder 13 works to drive the movable mold 12 to move downward for mold closing. During the mold closing process, the movable mold 12 presses the skin into the fixed mold 11 and fits it with the bottom wall. At this time, the four corners of the skin approach each other, driving a plurality of clamping mechanisms 22 to move horizontally in the fan-shaped grooves 10. The telescopic columns 21 shorten and the thrust springs 212 are compressed. Through the resilience of the thrust springs 212, the clamping mechanisms 22 provide a pulling force in the direction away from the fixed mold 11 to the skin, so that the skin remains flat during the injection molding process, which can prevent the automotive interior parts produced by injection molding from deforming and improve the yield rate of low-pressure injection molding.

[0042] As Figures 1 to 9 shown:

[0043] The clamping mechanism 22 further includes a rotating shaft 222 and a pair of torsion springs 223. The rotating shaft 222 is rotatably connected to the inner wall of the base 220, and the top clamping block 221 is rotatably connected to the periphery of the rotating shaft 222. The torsion spring 223 is sleeved on the periphery of the rotating shaft 222. One end of the torsion spring 223 is fixedly connected to one side of the top clamping block 221, and the other end of the torsion spring 223 is fixedly connected to the inner wall of the base 220. Rotating the top clamping block 221 to separate it from the bottom clamping block 221 can open the clamping mechanism 22. At this time, the torsion spring 223 is rotationally bent. Then, move one corner of the skin between the two clamping blocks 221, release the top clamping block 221, and the torsion spring 223 rebounds to drive it to rotate downward, so as to clamp the skin through the two clamping blocks 221.

[0044] As Figures 1 to 9 shown:

[0045] The skin flattening assembly 2 further includes a pair of angle adjustment mechanisms 23. The two angle adjustment mechanisms 23 are symmetrically arranged in the housing 20, and the two angle adjustment mechanisms 23 respectively adjust the angles of the two pairs of telescopic columns 21 on both sides of the fixed mold 11. The angle adjustment mechanism 23 includes a pair of gears 230, a pair of racks 231, a connecting plate 232 and a plurality of first return springs 233. The gear 230 is fixedly connected to the periphery of the other end of the sleeve 210. The gear 230 is rotatably connected to the inner wall of the housing 20. The gear 230 meshes with the rack 231. Both sides of the connecting plate 232 are fixedly connected to the two racks 231 respectively. The connecting plate 232 is slidably connected to the inner wall of the housing 20. One end of the first return spring 233 is fixedly connected to the connecting plate 232, and the other end of the first return spring 233 is fixedly connected to the inner wall of the housing 20. Push the connecting plate 232 to drive the rack 231 to slide horizontally in the housing 20. Through the meshing transmission between the rack 231 and the gear 230, the gear 230 drives the telescopic column 21 to rotate horizontally, so that the opening angle between the two telescopic columns 21 can be adjusted. At the same time, the clamping mechanism 22 moves in the fan-shaped groove 10, and the position of the clamping mechanism 22 can be adjusted to adapt to skins of different sizes. When the angle between the pair of telescopic columns 21 increases, the first return spring 233 is compressed. When the connecting plate 232 is released, the first return spring 233 rebounds to push the connecting plate 232 to reset, reducing the included angle between the pair of telescopic columns 21.

[0046] As Figures 1 to 9 shown:

[0047] The skin flattening assembly 2 further includes a hydraulic rod 24 and a push block 25. One end of the hydraulic rod 24 is fixedly connected to the inner wall of the housing 20, and the telescopic end of the hydraulic rod 24 is fixedly connected to one side of the push block 25. Both ends of the push block 25 and the opposite ends of the two connecting plates 232 are of inclined surface structures and are in contact with each other. When the hydraulic rod 24 works, its telescopic end drives the push block 25 to move horizontally in the housing 20, and the two connecting plates 232 are pushed horizontally along the inclined surface by the push block 25, so that the angle adjustment of the two pairs of telescopic columns 21 on both sides of the fixed mold 11 can be carried out simultaneously.

[0048] As Figures 1 to 12 shown:

[0049] The pressure stabilizing assembly 3 includes a fixed frame 30, a support frame 31, a pair of support rods 32 and a pair of tension springs 33. One side of the fixed frame 30 is fixedly connected to the support frame 31. The support rods 32 are fixedly connected to the inner wall of the machine body 1. Both ends of the support frame 31 are slidably connected to the outer periphery of the two support rods 32 respectively. The tension springs 33 are sleeved on the outer periphery of the support rods 32. One end of the tension spring 33 is fixedly connected to the bottom of the support frame 31, and the other end of the tension spring 33 is fixedly connected to the top wall of the machine body 1. Before injecting the raw material into the fixed mold 11, the tension provided by the rebound of the tension spring 33 makes the support frame 31 drive the fixed frame 30 to slide down along the support rods 32. The fixed frame 30 moves to the bottom and abuts against the top of the machine body 1, so that the skin can be clamped. The fixed frame 30 is located outside the fixed mold 11, so that the skin inside the fixed frame 30 can be free from the influence of the pulling force of the clamping mechanism 22, thus ensuring the stability of the injection pressure. When the moving mold 12 is separated from the fixed mold 11, the fixed frame 30 is separated from the top of the machine body 1. At this time, the skin is separated from the fixed frame 30, ensuring that the surface of the skin is under the action of the pulling force and maintains tension. When the moving mold 12 abuts against the fixed mold 11, the fixed frame 30 is located outside the fixed mold 11, and the bottom of the fixed frame 30 abuts against the top of the machine body 1. At this time, the skin in the fixed frame 30 is not affected by the pulling force and remains stationary.

[0050] As Figures 1 to 12 shown:

[0051] The pressure stabilizing assembly 3 further includes a U-shaped clamping block 34, a pair of telescopic rods 35 and a pair of second return springs 36. One side of the telescopic rod 35 is fixedly connected to the inner wall of the machine body 1, and the telescopic end of the telescopic rod 35 is fixedly connected to one side of the U-shaped clamping block 34. The second return spring 36 is sleeved on the periphery of the telescopic rod 35. One end of the second return spring 36 is fixedly connected to the U-shaped clamping block 34, and the other end of the second return spring 36 is fixedly connected to the inner wall of the machine body 1. The support frame 31 passes through the machine body 1 and is slidably connected thereto. The bottom of the other side of the U-shaped clamping block 34 passes through the support frame 31 and is in clamping fit therewith. One side of the top of the U-shaped clamping block 34 passes through the side wall of the machine body 1 and is slidably connected thereto. When the support frame 31 moves upward along the machine body 1 to a suitable position, the second return spring 36 rebounds under the support of the telescopic rod 35 and pushes the U-shaped clamping block 34 to move horizontally. The bottom of the U-shaped clamping block 34 passes through the support frame 31 and is in clamping connection therewith. At the same time, the top of the U-shaped clamping block 34 passes through the side wall of the machine body 1 and is in clamping connection therewith, so as to limit the support frame 31 and the fixed frame 30 and make them stay at a high position, leaving space for paving the skin. On the contrary, pushing the U-shaped clamping block 34 to make its top slide into the machine body 1 can separate its bottom from the support frame 31 and make the fixed frame 30 fall.

[0052] As Figures 1 to 12 shown:

[0053] The pressure stabilizing assembly 3 further includes a bracket 37 and a roller 370. One side of the bracket 37 is fixedly connected to the top of the moving die 12, and the roller 370 is rotatably connected to the inner wall of the other side of the bracket 37. One side of the top of the U-shaped clamping block 34 is of an arc structure, and the roller 370 abuts against the top of the U-shaped clamping block 34. When the moving die 12 moves downward, it drives the bracket 37 to move, and at the same time makes the roller 370 roll downward along the machine body 1. When the moving die 12 is in mutual fit with the fixed die 11, the roller 370 moves to abut against the U-shaped clamping block 34 and makes it slide into the machine body 1, so as to lower the fixed frame 30 to press the skin, ensuring that the fixed frame 30 clamps the skin after it fits against the inner wall of the fixed die 11. And the setting of the roller 370 can also reduce friction and facilitate the extrusion of the U-shaped clamping block 34.

[0054] As Figures 1 to 12 shown:

[0055] A pair of rotating grooves 300 are provided at the four corners of the bottom of the fixed frame 30. The two rotating grooves 300 communicate with each other. A round rod 301 is fixedly connected to the inner wall of the rotating groove 300. A sector plate 302 is rotatably connected to the periphery of the round rod 301. When the skin fits against the inner wall of the fixed mold 11, the excess parts at the four corners of the skin will bulge. During the downward movement of the fixed frame 30, the bulging parts of the skin push the sector plate 302 to rotate upward around the round rod 301, causing it to slide into the rotating groove 300, thereby preventing the fixed frame 30 from pressing the skin. When the fixed frame 30 is separated from the top of the machine body 1, the sector plate 302 is in a vertical state; at this time, if there is no bulge at the four corners of the skin, the sector plate 302 can play a role in fixing the skin when the fixed frame 30 falls. When the bottom of the fixed frame 30 abuts against the top of the machine body 1, the sector plate 302 is in an inclined state. At this time, if the skin bulges, the rotating groove 300 can accommodate the bulging part of the skin.

[0056] As Figures 1 to 12 shown:

[0057] The bottom of the bracket 37 is fixedly connected with a T-shaped plate 371. The bracket 37 is located between the inner walls of the support frame 31. The top of the T-shaped plate 371 abuts against the bottom of the support frame 31. When the moving mold 12 moves vertically, it drives the bracket 37 to move vertically between the inner walls of the support frame 31. When the moving mold 12 falls, the bracket 37 does not contact the support frame 31. When the moving mold 12 moves upward, the T-shaped plate 371 can be driven to move upward through the bracket 37 to lift the support frame 31, so that it moves to a high position and is fixed by the U-shaped block 34.

[0058] It should be noted that the above specific implementation manners are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art should understand that various modifications, equivalent replacements, changes, etc. can be made to the present invention. However, as long as these transformations do not deviate from the spirit of the present invention, they should be within the protection scope of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of clearly describing the positional relationship and functions between various components.

Claims

1. A low-pressure injection molding auxiliary device for automobile interior decoration parts, comprising a machine body (1), a fixed mold (11) and a movable mold (12), wherein the bottom of the fixed mold (11) is fixedly connected to the top of the machine body (1), and the movable mold (12) is vertically movable and installed on the machine body (1), characterized in that: The device also includes a skin flattening component (2), a pressure stabilizing component (3) and a hydraulic cylinder (13). The skin flattening component (2) includes a shell (20), a plurality of telescopic columns (21) and a plurality of clamping mechanisms (22). The top of the shell (20) is fixedly connected to the top wall of the body (1). The telescopic columns (21) are installed on the shell (20) in a horizontally rotatable manner. The telescopic columns (21) include a sleeve (210), a U-shaped slide bar (211) and a pair of thrust springs (212). One end of the U-shaped slide bar (211) passes through the sleeve (210) and is slidably connected thereto. The thrust spring (212) is sleeved on the outer periphery of the U-shaped slide bar (211). One end of the thrust spring (212) is fixedly connected to the sleeve (210). The four corners of the top of the body (1) are provided with penetrating fan-shaped grooves (10). The clamping mechanisms (22) can be The clamping mechanism (22) is arranged in a horizontally movable manner in the fan-shaped groove (10), and comprises a base (220) and a pair of clamping blocks (221). The base (220) is fixedly connected to the other end of the U-shaped slide bar (211), and the other end of the thrust spring (212) is fixedly connected to the base (220). The bottom of one of the clamping blocks (221) is fixedly connected to the top of the base (220), and one end of the other clamping block (221) is hinged to the end of the base (220) away from the housing (20). The teeth on the two clamping blocks (221) are in contact with each other. The pressure stabilizing component (3) is installed on the machine body (1), and the pressure stabilizing component (3) is used to maintain the pressure in the lower mold stable. The top of the hydraulic cylinder (13) is fixedly connected to the top wall of the machine body (1), and the telescopic end of the hydraulic cylinder (13) is fixedly connected to the top of the movable mold (12). The clamping mechanism (22) further comprises a rotating shaft (222) and a pair of torsion springs (223); the rotating shaft (222) is rotatably connected to the inner wall of the base (220); the clamping block (221) at the top is rotatably connected to the periphery of the rotating shaft (222); the torsion spring (223) is sleeved on the periphery of the rotating shaft (222); one end of the torsion spring (223) is fixedly connected to one side of the clamping block (221) at the top; and the other end of the torsion spring (223) is fixedly connected to the inner wall of the base (220); The epidermis flattening assembly (2) also includes a pair of angle adjustment mechanisms (23), the two angle adjustment mechanisms (23) are symmetrically arranged in the shell (20), the angle adjustment mechanism (23) includes a pair of gears (230), a pair of racks (231), a connecting plate (232) and a plurality of first return springs (233), the gear (230) is fixedly connected to the outer periphery of the other end of the sleeve (210), the gear (230) is rotatably connected to the inner wall of the shell (20), the gear (230) and the rack (231) are meshed with each other, the two sides of the connecting plate (232) are fixedly connected to the two racks (231) respectively, the connecting plate (232) is slidably connected to the inner wall of the shell (20), one end of the first return spring (233) is fixedly connected to the connecting plate (232), and the other end of the first return spring (233) is fixedly connected to the inner wall of the shell (20); The skin flattening assembly (2) further comprises a hydraulic rod (24) and a push block (25), one end of the hydraulic rod (24) being fixedly connected to the inner wall of the housing (20), the telescopic end of the hydraulic rod (24) being fixedly connected to one side of the push block (25), and both ends of the push block (25) and the opposite ends of the two connecting plates (232) being inclined structures and in conflict with each other; The pressure stabilizing assembly (3) comprises a fixed frame (30), a support frame (31), a pair of support rods (32) and a pair of tension springs (33); one side of the fixed frame (30) is fixedly connected to the support frame (31); the support rods (32) are fixedly connected to the inner wall of the machine body (1); both ends of the support frame (31) are slidably connected to the outer peripheries of the two support rods (32); the tension springs (33) are sleeved on the outer peripheries of the support rods (32); one end of the tension spring (33) is fixedly connected to the bottom of the support frame (31); and the other end of the tension spring (33) is fixedly connected to the top wall of the machine body (1); When the movable mold (12) is separated from the fixed mold (11), the fixed frame (30) is separated from the top of the machine body (1); When the movable mold (12) and the fixed mold (11) are in contact with each other, the fixed frame (30) is located outside the fixed mold (11), and the bottom of the fixed frame (30) is in contact with the top of the machine body (1).

2. The low-pressure injection molding auxiliary device for automobile interior decoration parts according to claim 1, characterized in that: The pressure stabilizing assembly (3) further comprises a U-shaped block (34), a pair of telescopic rods (35) and a pair of second return springs (36); one side of the telescopic rod (35) is fixedly connected to the inner wall of the body (1); the telescopic end of the telescopic rod (35) is fixedly connected to one side of the U-shaped block (34); the second return spring (36) is sleeved around the outer periphery of the telescopic rod (35); one end of the second return spring (36) is fixedly connected to the U-shaped block (34); the other end of the second return spring (36) is fixedly connected to the inner wall of the body (1); the support frame (31) passes through the body (1) and is slidably connected thereto; the bottom of the other side of the U-shaped block (34) passes through the support frame (31) and is engaged with the support frame; and the top side of the U-shaped block (34) passes through the side wall of the body (1) and is slidably connected thereto.

3. The low-pressure injection molding auxiliary device for automobile interior decoration parts according to claim 2, characterized in that: The pressure stabilizing assembly (3) further comprises a bracket (37) and a roller (370); one side of the bracket (37) is fixedly connected to the top of the movable mold (12); the roller (370) is rotatably connected to the inner wall of the other side of the bracket (37); one side of the top of the U-shaped clamping block (34) is an arc-shaped structure; the roller (370) and the top of the U-shaped clamping block (34) are in contact with each other.

4. The low-pressure injection molding auxiliary device for automobile interior decoration parts according to claim 3, characterized in that: A pair of rotating grooves (300) are provided at the four corners of the bottom of the fixed frame (30), the two rotating grooves (300) are connected to each other, a round rod (301) is fixedly connected to the inner wall of the rotating groove (300), and a fan-shaped plate (302) is rotatably connected to the outer periphery of the round rod (301); When the fixing frame (30) is separated from the top of the machine body (1), the fan-shaped plate (302) is in a vertical state; When the bottom of the fixing frame (30) and the top of the machine body (1) are in contact with each other, the fan-shaped plate (302) is in an inclined state.

5. The low-pressure injection molding auxiliary device for automobile interior decoration parts according to claim 4, characterized in that: A T-shaped plate (371) is fixedly connected to the bottom of the bracket (37), the bracket (37) is located between the inner walls of the support frame (31), and the top of the T-shaped plate (371) and the bottom of the support frame (31) are in contact with each other.

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