Auxiliary device for low-pressure injection molding of automotive upholstery

Abstract

The invention relates to the technical field of low-pressure injection molding, in particular to an automotive upholstery low-pressure injection molding auxiliary device which comprises a machine body, a fixed mold, a movable mold, a skin flattening assembly, a pressure stabilizing assembly and a hydraulic cylinder. The skin flattening assembly comprises a shell, a plurality of telescopic columns and a plurality of clamping mechanisms, the top of the shell is fixedly connected with the top wall of the machine body, and the telescopic columns are horizontally and rotatably mounted on the shell. In the mold closing process of the movable mold, the skin is pressed into the fixed mold and attached to the bottom wall of the fixed mold, at the moment, the four corners of the skin are close to one another, tensile force far away from the fixed mold is provided for the skin through resilience force of the thrust spring, and therefore the skin is kept flat in the injection molding process, and the injection-molded automobile interior trim part is prevented from deforming; and the yield of low-pressure injection molding is improved.

Description

Technical Field

[0001] The invention relates to the technical field of low-pressure injection molding, and in particular to a low-pressure injection molding auxiliary device for automobile interior decoration parts. Background Art

[0002] The low-pressure injection process is a packaging technology that uses relatively low pressure (0.15-4 MPa) to inject molten material into a mold and quickly solidify it. It uses the excellent sealing and excellent physical and chemical properties of hot-melt materials to achieve insulation, heat resistance, impact resistance, vibration resistance, moisture resistance, waterproofness, dust resistance, chemical corrosion resistance, etc., and has a good protective effect on electronic components.

[0003] The process of low-pressure injection molding is as follows: first, the skin is placed in the mold, then the mold is closed, the skin is pressed into the fixed mold by the movable mold, and then the plasticized molten plastic is injected into the closed mold cavity with the help of the screw thrust, and the product is obtained after solidification. The material used for low-pressure injection molding skin can be cloth or PVC fabric. At present, this process has been widely used in the production of automotive interior products such as automotive door guards, pillar guards and parcel shelf guards.

[0004] The existing low-pressure injection molding process is not convenient for flattening the surface during the mold closing operation. When the movable mold moves to extrude the surface, the surface material is relatively soft and easily deformed, resulting in deformation of the molded automotive interior parts, reducing the yield rate. In addition, during the injection molding process, excessive surface tension will cause increased pressure inside the mold, affecting the injection molding quality. Summary of the invention

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

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

[0007] 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.

[0008] 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.

[0009] 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.

[0010] Preferably, the pressure stabilization 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 rod is fixedly connected to the inner wall of the machine body, both ends of the support frame are respectively slidably connected to the periphery of the two support rods, the tension spring is sleeved on the periphery of the support rod, 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 movable mold is separated from the fixed mold, the fixed frame is separated from the top of the machine body. When the movable mold and the fixed mold conflict with each other, the fixed frame is located on the periphery of the fixed mold, and the bottom of the fixed frame conflicts with the top of the machine body.

[0011] Preferably, the pressure stabilization assembly also 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, the telescopic end of the telescopic rod is fixedly connected to one side of the U-shaped block, the second return spring is sleeved on the outer periphery of the telescopic rod, one end of the second return spring is fixedly connected to the U-shaped block, 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 bottom of the other side of the U-shaped block passes through the support frame and is engaged with the support frame, and the top side of the U-shaped block passes through the side wall of the machine body and is slidably connected thereto.

[0012] Preferably, the pressure stabilization assembly also includes a bracket and a roller, one side of the bracket is fixedly connected to the top of the movable mold, 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 an arc structure, and the roller and the top of the U-shaped block are in conflict with each other.

[0013] Preferably, a pair of rotating grooves are opened at the four corners of the bottom of the fixed frame, the two rotating grooves are connected to each other, a round rod is fixedly connected to the inner wall of the rotating groove, and a fan-shaped 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 fan-shaped plate is in a vertical state, and when the bottom of the fixed frame and the top of the machine body are in conflict with each other, the fan-shaped plate is in an inclined state.

[0014] 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 and the bottom of the support frame are in conflict with each other.

[0015] Beneficial effects of the present invention: 1. When the present invention performs low-pressure injection molding, the skin is laid flat on the top of the fixed mold, and the four corners of the skin are clamped and fixed by a clamping mechanism. Then, the hydraulic cylinder drives the movable mold to move downward. During the mold closing process, the skin is pressed into the interior of the fixed mold and fits with its bottom wall. At this time, the four corners of the skin are close to each other, the telescopic column is shortened and the thrust spring is compressed. 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, which can prevent the molded automotive interior parts from being deformed and improve the yield rate of low-pressure injection molding.

[0016] 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

[0017] 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.

[0018] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 .

[0019] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 .

[0020] Figure 3 It is a schematic diagram of the body structure of the present invention.

[0021] Figure 4 It is a cross-sectional view of the machine body structure of the present invention.

[0022] Figure 5 yes Figure 4 A magnified view of the structure at center.

[0023] Figure 6 The epidermis flattening component structure of the present invention is enlarged Figure 1 .

[0024] Figure 7 The epidermis flattening component structure of the present invention is enlarged Figure 2 .

[0025] Figure 8 It is a disassembled diagram of the telescopic column structure of the present invention.

[0026] Fig. 9 It is a disassembled diagram of the clamping mechanism structure of the present invention.

[0027] Fig.10 yes Figure 4 A magnified view of the structure at point B.

[0028] Fig.11 The pressure stabilization component structure of the present invention is split Figure 1 .

[0029] Fig.12The pressure stabilization component structure of the present invention is split Figure 2 .

[0030] In the figure: 1. Machine body; 10. Sector groove; 11. Fixed mold; 12. Moving mold; 13. Hydraulic cylinder; 2. Skin flattening assembly; 20. Shell; 21. Telescopic column; 210. Sleeve; 211. U-shaped slide bar; 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. Push block; 3. Pressure stabilizing assembly; 30. Fixed frame; 300. Rotating groove; 301. Round rod; 302. Fan-shaped plate; 31. Support frame; 32. Support rod; 33. Tension spring; 34. U-shaped block; 35. Telescopic rod; 36. Second reset spring; 37. Bracket; 370. Roller; 371. T-shaped plate. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0032] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0033] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which 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. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] like Figures 1 to 12 As shown: The low-pressure injection molding auxiliary device for automobile interior decoration parts includes a 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 body 1, and the movable mold 12 can be vertically movably installed on the body 1. The movable mold 12 is driven up and down by a driving component to make it fit and separate with the fixed mold 11, so as to open and close the mold to complete the injection molding. It also includes an epidermis flattening component 2, a pressure stabilizing component 3 and a hydraulic cylinder 13. The epidermis 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 column 21 can be installed on the shell 20 for horizontal rotation. The telescopic column 21 includes 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 mechanism 22 can be horizontally moved. The movable mold 21 is arranged in the fan-shaped groove 10, and 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 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 shell 20. The teeth on the two clamping blocks 221 conflict with each other. The pressure stabilizing component 3 is installed on the body 1. 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 body 1, and the telescopic end of the hydraulic cylinder 13 is fixedly connected to the top of the movable mold 12. During low-pressure injection molding, the epidermis is spread flat on the top of the fixed mold 11, and the four corners of the epidermis are placed in the clamping mechanism 22. The four corners of the epidermis are clamped and fixed by the clamping block 221, and then the hydraulic cylinder 13 is operated to drive the movable mold 12 to move down for mold closing. During the mold closing process, the movable mold 12 presses the epidermis into the interior of the fixed mold 11 and fits with its bottom wall. At this time, the four corners of the epidermis are close to each other, driving multiple clamping mechanisms 22 to move horizontally in the fan-shaped groove 10, the telescopic column 21 is shortened and the thrust spring 212 is compressed. Through the rebound force of the thrust spring 212, the clamping mechanism 22 provides a pulling force to the epidermis away from the fixed mold 11, so that the epidermis remains flat during the injection molding process, which can prevent the molded automotive interior parts from being deformed and improve the yield rate of low-pressure injection molding.

[0036] like Figures 1 to 9 As shown: The clamping mechanism 22 also 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. The clamping block 221 at the top is rotatably connected to the outer periphery of the rotating shaft 222. The torsion spring 223 is sleeved on the outer 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 clamping block 221 at the top is rotated to separate it from the clamping block 221 at the bottom, so that the clamping mechanism 22 can be opened. At this time, the torsion spring 223 is rotated and bent, and then one corner of the epidermis is moved between the two clamping blocks 221. The clamping block 221 at the top is released, and the torsion spring 223 rebounds and drives it to rotate downward, so that the epidermis is clamped by the two clamping blocks 221.

[0037] like Figures 1 to 9 As shown: The skin flattening assembly 2 also includes a pair of angle adjustment mechanisms 23, which 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 and the rack 231 are meshed with each other, the two sides of the connecting plate 232 are respectively fixedly connected to the two racks 231, 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. The connecting plate 232 is pushed to drive the rack 231 to slide horizontally in the shell 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 a 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 and pushes the connecting plate 232 to reset, so that the angle between the pair of telescopic columns 21 is reduced.

[0038] like Figures 1 to 9 As shown: The skin flattening assembly 2 also 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 inclined structures and conflict with each other. When the hydraulic rod 24 is working, its telescopic end drives the push block 25 to move horizontally in the housing 20, and the push block 25 pushes the two connecting plates 232 to slide horizontally along the inclined surface, so that the angles of the two pairs of telescopic columns 21 on both sides of the fixed mold 11 can be adjusted at the same time.

[0039] like Figures 1 to 12 As shown: 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 body 1, and the two ends of the support frame 31 are respectively slidably connected to the outer periphery of the two support rods 32. The tension spring 33 is 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 body 1. Before the raw material is injected into the fixed mold 11, the tension provided by the rebound of the tension spring 33 causes the support frame 31 to drive the fixed frame 30 to slide down along the support rods 32, and the fixed frame 30 moves to the bottom and contacts with the top of the body 1, so that the epidermis can be clamped. The fixed frame 30 is located on the outer periphery of the fixed mold 11, so that the epidermis inside the fixed frame 30 is not affected by the tension of the clamping mechanism 22, thereby ensuring the stability of the injection pressure. When the movable mold 12 is separated from the fixed mold 11, the fixed frame 30 is separated from the top of the body 1, and the skin is separated from the fixed frame 30, ensuring that the skin surface is under tension. When the movable mold 12 and the fixed mold 11 are in conflict with each other, the fixed frame 30 is located outside the fixed mold 11, and the bottom of the fixed frame 30 is in conflict with the top of the body 1. At this time, the skin in the fixed frame 30 is not affected by the tension and remains stationary.

[0040] like Figures 1 to 12 As shown: The pressure stabilization component 3 also includes 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 on 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, and 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 it, and the top side of the U-shaped block 34 passes through the side wall of the body 1 and is slidably connected thereto. When the support frame 31 moves up to a suitable position along the body 1, the second return spring 36 rebounds under the support of the telescopic rod 35, and pushes the U-shaped block 34 to move horizontally. The bottom of the U-shaped block 34 passes through the support frame 31 and is engaged with it, and at the same time, the top of the U-shaped block 34 passes through the side wall of the body 1 and is engaged with it, thereby limiting the support frame 31 and the fixed frame 30 so that they stay at a high place to leave space for flattening the surface. Conversely, pushing the U-shaped block 34 so that its top slides into the body 1 can separate its bottom from the support frame 31, allowing the fixed frame 30 to fall.

[0041] like Figures 1 to 12 As shown: The pressure stabilizing assembly 3 also includes a bracket 37 and a roller 370. One side of the bracket 37 is fixedly connected to the top of the movable mold 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 block 34 is an arc structure, and the roller 370 and the top of the U-shaped block 34 are mutually in conflict. When the movable mold 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 movable mold 12 and the fixed mold 11 fit each other, the roller 370 moves to fit each other with the U-shaped block 34, so that it slides into the machine body 1, thereby lowering the fixed frame 30 to press the surface, ensuring that the fixed frame 30 is clamped after the surface fits the inner wall of the fixed mold 11, and the setting of the roller 370 can also reduce friction and facilitate the squeezing of the U-shaped block 34.

[0042] like Figures 1 to 12 As shown: 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 interconnected. The inner wall of the rotating groove 300 is fixedly connected to a round rod 301. The outer periphery of the round rod 301 is rotatably connected to a fan-shaped plate 302. When the epidermis is attached to the inner wall of the fixed mold 11, the excess parts at the four corners of the epidermis will bulge. During the falling process of the fixed frame 30, the bulging part of the epidermis pushes the fan-shaped plate 302 to rotate upward around the round rod 301, so that it slides into the rotating groove 300, thereby preventing the fixed frame 30 from crushing the epidermis. When the fixed frame 30 is separated from the top of the body 1, the fan-shaped plate 302 is in a vertical state; at this time, if there is no bulge at the four corners of the epidermis, the fan-shaped plate 302 can play a role in fixing the epidermis after the fixed frame 30 falls. When the bottom of the fixed frame 30 and the top of the body 1 collide with each other, the fan-shaped plate 302 is in an inclined state. At this time, if the epidermis bulges, the rotating groove 300 can be used to accommodate the bulging part of the epidermis.

[0043] like Figures 1 to 12 As shown: The bottom of the bracket 37 is fixedly connected with a T-shaped plate 371, and the bracket 37 is located between the inner walls of the support frame 31, and the top of the T-shaped plate 371 contacts the bottom of the support frame 31. When the movable mold 12 moves vertically, the bracket 37 is driven to move vertically between the inner walls of the support frame 31. When the movable mold 12 falls, the bracket 37 does not contact the support frame 31. When the movable mold 12 moves upward, the bracket 37 drives the T-shaped plate 371 to move upward to lift the support frame 31, so that it moves to a high place and is fixed by the U-shaped block 34.

[0044] It should be noted that the above specific implementations are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these changes do not deviate from the spirit of the present invention, they should be within the scope of protection of the present invention. In addition, some terms used in the specification and claims of this application are not limiting, but are only for the convenience of clearly describing the positional relationship and function between the 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). The clamping mechanism (22) 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). 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 an 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). 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). The telescopic end of the hydraulic cylinder (13) is fixedly connected to the top of the movable mold (12).

2. The low-pressure injection molding auxiliary device for automobile interior decoration parts according to claim 1, characterized in that: 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 outer periphery of the rotating shaft (222); the torsion spring (223) is sleeved on the outer 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).

3. The low-pressure injection molding auxiliary device for automobile interior decoration parts according to claim 1, characterized in that: 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 rotationally 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).

4. The low-pressure injection molding auxiliary device for automobile interior decoration parts according to claim 3, characterized in that: The surface flattening assembly (2) further comprises a hydraulic rod (24) and a push block (25), wherein 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), and both ends of the push block (25) and the opposite ends of the two connecting plates (232) are inclined structures and are in conflict with each other.

5. The low-pressure injection molding auxiliary device for automobile interior decoration parts according to claim 1, characterized in that: 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).

6. The low-pressure injection molding auxiliary device for automobile interior decoration parts according to claim 5, 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.

7. The low-pressure injection molding auxiliary device for automobile interior decoration parts according to claim 6, 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.

8. The low-pressure injection molding auxiliary device for automobile interior decoration parts according to claim 7, 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.

9. The low-pressure injection molding auxiliary device for automobile interior decoration parts according to claim 8, 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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