Injection molding device and injection molding process for automobile trim production

Abstract

The present invention relates to the field of automobile trim injection molding technology, and specifically to an injection molding device and injection molding process for automobile trim production, comprising a shell, an injection molding component, an inflation stripping component, a lower mold separation component and a direction adjustment component. The injection molding component comprises an upper mold base, an upper mold, a lower mold base, a lower mold and a driving mechanism. The upper mold base is vertically movably installed on the shell through the driving mechanism, the top of the upper mold is fixedly connected to the bottom of the upper mold base, and the lower mold is horizontally rotatably installed on the shell through the direction adjustment component. In order to prevent the injection molded part from adhering to the inner wall of the mold and causing tearing during demolding, the present invention performs two demolding operations. Before the second demolding, air is injected into the gap between the injection molded part and the inner wall of the lower mold through the inflation hole. The injection molded part is gradually separated from the inner wall of the lower mold by increasing the air pressure, so that the injection molded part is subjected to force slowly and evenly during the demolding process, thereby preventing tearing at the adhesion point and improving the injection molding quality.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile decoration injection molding, and in particular to an injection molding device and an injection molding process for producing automobile decoration parts. Background Art

[0002] Automotive accessories serve to decorate and enhance the appearance of a car. They are broadly categorized as interior and exterior trims, and their decorative effects directly impact the vehicle's interior and exterior image. Due to their diverse types and functions, different automotive accessories are made from a variety of materials. Plastics are often used as the supporting shells for these accessories during their production.

[0003] The plastic shells of automobile accessories are mostly produced by injection molding, which is characterized by being able to be molded in one step, which is convenient for mass production, and being able to produce different plastic shells by replacing the mold. The process is relatively mature and is convenient for reducing costs. For example, a pressure-maintaining automobile accessory injection molding device with Chinese patent publication number CN117962231B relates to the technical field of injection molds, including a base and a slide, the base is laterally symmetrically provided with slides, the slide is slidably connected between the symmetrically provided slides, the first spring is connected between the bottom of the slide facing the base and the base, the molds are respectively provided on the base and the slide, the mold close to the side of the slide is provided with multiple injection inlets, the electric push rods are respectively provided on the side of the slide away from the base, the support frame is fixed between the electric push rods, and the plasticizing and pressure-maintaining assembly is provided on the support frame. This solution solves the problem that the injection inlet is easily blocked during injection molding.

[0004] However, most existing injection molding devices and processes for producing automotive trim parts still struggle with preventing adhesion during demolding. Due to the high internal mold pressure during the injection molding process, molded parts can easily adhere to the mold's inner wall after molding, causing surface deformation during demolding and poor injection molding quality. In particular, insufficient cooling of the molded part during demolding can increase adhesion and even tearing, reducing the yield rate and increasing production costs. Summary of the Invention

[0005] The purpose of the present invention is to provide an injection molding device and an injection molding process for producing automotive accessories, which can prevent the injection molded parts from sticking to the inner wall of the mold during demoulding, thereby improving the injection molding quality.

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

[0007] Provided is an injection molding device for producing automotive accessories, comprising a shell, an injection molding component, an inflation stripping component, a lower mold separation component and a direction adjustment component. The injection molding component comprises an upper mold base, an upper mold, a lower mold base, a lower mold and a driving mechanism. The upper mold base can be vertically movably installed on the shell through the driving mechanism. The top of the upper mold is fixedly connected to the bottom of the upper mold base. The lower mold can be horizontally rotatably installed on the shell through the direction adjustment component. The bottom of the lower mold is plugged into the groove on the top of the lower mold base. The inflation stripping component comprises an air pump, a hose and a pair of leak-proof mechanisms. The bottom of the air pump is fixedly connected to the bottom wall of the shell. A pair of inflation holes is opened on the bottom wall of the lower mold. The two inflation holes are symmetrically distributed on both sides of the lower mold. A three-way groove is opened at one end of the lower mold, and the three-way groove is connected to the inflation hole. One end of the hose is connected to the air outlet of the air pump, and the other end of the hose passes through the side wall of the shell and is connected to the three-way groove. The leak-proof mechanism is installed in the inflation hole. The leak-proof mechanism is used to prevent molten plastic from flowing into the inflation hole. The lower mold separation component is installed on the shell. The lower mold separation component is used to drive the lower mold to move vertically.

[0008] Preferably, the leakage-proof mechanism includes a piston rod and a thrust spring, the top of the piston rod is slidably connected to the inflation hole, two pairs of circular holes are opened on the bottom wall of the lower mold base, the two pairs of circular holes are distributed circumferentially on the lower mold base, the bottom of the piston rod is plugged into the circular hole, one end of the thrust spring is fixedly connected to the side wall of the piston rod, and the other end of the thrust spring is fixedly connected to the top wall of the inflation hole. When the two piston rods are plugged into the other pair of circular holes, the top of the piston rod is flush with the bottom wall of the lower mold, and the inflation hole is blocked by the three-way groove. When the two piston rods are plugged into one pair of circular holes, the top of the piston rod is located at the bottom of the three-way groove, and the inflation hole is connected to the three-way groove.

[0009] Preferably, the driving mechanism includes a motor, a screw and a pair of guide rods. The bottom of the motor is fixedly connected to the top of the shell. The screw and the guide rod are rotatably installed between the top wall and the bottom wall of the shell. The output shaft of the motor passes through the top wall of the shell and is coaxially connected to the top of the screw. A first thread groove is provided on the periphery of the screw. One side of the upper mold base is threadedly connected to the periphery of the first thread groove, and the periphery of the guide rod is slidingly connected to the upper mold base.

[0010] Preferably, the lower mold separation assembly includes a pair of support rods, a support frame and an ejection mechanism, one side of the support rod is fixedly connected to the lower mold, and the other side of the support rod is slidably connected to the outer periphery of the guide rod. The support frame can be installed on the support rod by moving up and down through the ejection mechanism. A second thread groove is provided on the outer periphery of the screw rod, and the outer periphery of the second thread groove is threadedly connected to one side of the support frame. The pitch of the second thread groove is smaller than that of the first thread groove, and the second thread groove has the same direction as the first thread groove.

[0011] Preferably, the ejection mechanism includes a pair of T-shaped rods, a pair of tension springs, a pair of limiting rings, a pair of connecting rods and a pair of ejection blocks, the bottom of the T-shaped rod is fixedly connected to the top of the support frame, the T-shaped rod passes through the support rod and is slidably connected thereto, the tension spring is sleeved on the outer periphery of the T-shaped rod, one end of the tension spring is fixedly connected to the top of the T-shaped rod, the other end of the tension spring is fixedly connected to the top of the support rod, the limiting ring is fixedly connected to the outer periphery of the guide rod, the bottom of the limiting ring and the top of the support rod are in conflict with each other, one side of the connecting rod is fixedly connected to the support frame, a pair of sliding grooves are provided on the bottom wall of the lower mold, the sliding grooves are symmetrically distributed at both ends of the lower mold, the sliding grooves are slidably connected to the ejection block, the other end of the connecting rod passes through the side wall of the lower mold and is slidably connected thereto, and the ejection block can be vertically movably installed on the connecting rod.

[0012] Preferably, the ejection mechanism also includes a pair of telescopic rods and a pair of first return springs, the bottom of the telescopic rod is fixedly connected to the connecting rod, the telescopic end of the telescopic rod is fixedly connected to the bottom of the ejection block, the first return spring is sleeved on the outer periphery of the telescopic rod, one end of the first return spring is fixedly connected to the ejection block, and the other end of the first return spring is fixedly connected to the connecting rod.

[0013] Preferably, the direction adjustment assembly includes a rotating seat, a pair of bevel gears, a rotating shaft and a linkage mechanism. The top of the rotating seat is fixedly connected to the bottom of the lower mold seat, the bottom of the rotating seat passes through the top wall of the shell and is coaxially connected to one of the bevel gears, the two bevel gears are meshed with each other, the other bevel gear is coaxially connected to one end of the rotating shaft, and the other end of the rotating shaft is rotatably connected to the inner wall of the shell. The linkage mechanism is installed on the rotating shaft, and the linkage mechanism is used to drive the rotating shaft to rotate when the support frame rises.

[0014] Preferably, the linkage mechanism includes a ratchet, a lifting rod, multiple pawls and multiple second return springs, the ratchet is coaxially connected to the periphery of the rotating shaft, the top of the lifting rod is fixedly connected to the bottom of the support frame, the bottom of the lifting rod passes through the top wall of the shell and is slidably connected thereto, one end of the lifting rod is provided with multiple cavities, one end of the pawl is rotatably connected to the inner wall of the cavity, the other end of the pawl is in conflict with the teeth on the ratchet, one end of the second return spring is fixedly connected to the pawl, and the other end of the second return spring is fixedly connected to the inner wall of the cavity.

[0015] Preferably, the pawls are located at the outer bottom of the lifting rod. When the lower mold is inserted into the groove on the lower mold base, the ratchet and the pawl are separated. When the lower mold is separated from the lower mold base, the ratchet and the pawl conflict with each other.

[0016] The present invention also provides an injection molding process for an injection molding device for producing automotive accessories, comprising the following steps: step one: an injection molding component is installed on the shell, which can drive the upper mold to move downward to complete the first mold closing, and then the molten plastic is injected between the upper mold and the lower mold for injection molding; step two: after the injection molded part is cooled, the upper mold is driven to move upward by a driving mechanism installed on the shell for the first demolding, and at the same time, the lower mold is separated from the lower mold base by a lower mold separation component installed on the shell, so as to facilitate the rotation of the lower mold base; step three: a direction adjustment component is installed on the shell, and is used to drive the lower mold base to rotate 90 degrees during the upward movement of the lower mold, and then the second mold closing is performed; step four: an inflation separation component is installed on the shell, which can inject air into the gap between the lower mold and the injection molded part to completely separate them and improve the injection molding demolding effect; step five: finally, the second demolding is performed, and the injection molded part is ejected out of the lower mold by the ejection mechanism installed on the shell for easy removal.

[0017] Beneficial effects of the present invention:

[0018] 1. During injection molding, the present invention allows the molded part to be demolded twice after cooling. Before the second demolding, air is injected through the air holes into the gap between the molded part and the inner wall of the lower mold. By increasing the air pressure, the molded part is gradually separated from the inner wall of the lower mold, so that the molded part is subjected to slow and uniform force during the demolding process, preventing tearing at the adhesion point and improving the injection molding quality.

[0019] 2. During the first demolding, if the injection molded part is stuck, it is easy to tear if it is directly ejected. The ejection mechanism provided in the present invention can reduce the ejection force and prevent the injection molded part from tearing. During the second demolding, a layer of air film exists between the injection molded part and the lower mold to avoid adhesion. The ejection block can eject the injection molded part out of the lower mold under the thrust of the return spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention Figure 1 .

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention Figure 2 .

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention Figure 3 .

[0024] Figure 4 It is a cross-sectional view of the shell structure of the present invention.

[0025] Figure 5 It is a schematic diagram of the shell structure of the present invention.

[0026] Figure 6 The injection molding component structure of the present invention is split Figure 1 .

[0027] Figure 7 The injection molding component structure of the present invention is split Figure 2 .

[0028] Figure 8 It is a structural schematic diagram of the lower mold separation component of the present invention.

[0029] Figure 9 It is a cross-sectional view of the lower die base structure of the present invention.

[0030] Figure 10 It is a cross-sectional view of the lower mold structure of the present invention.

[0031] Figure 11 It is a structural schematic diagram of the direction adjustment component of the present invention.

[0032] Figure 12 yes Figure 4 A magnified view of the structure at point A in the middle.

[0033] Figure 13 It is a cross-sectional view of the lifting rod structure of the present invention.

[0034] In the picture:

[0035] 1. Shell;

[0036] 2. Injection molding assembly; 20. Upper mold base; 21. Upper mold; 22. Lower mold base; 220. Round hole; 23. Lower mold; 230. Inflatable hole; 231. Three-way groove; 232. Slideway; 24. Drive mechanism; 25. Motor; 26. Screw; 260. First thread groove; 261. Second thread groove; 27. Guide rod;

[0037] 3. Inflatable stripping assembly; 30. Air pump; 31. Hose; 32. Leakage prevention mechanism; 33. Piston rod; 34. Thrust spring;

[0038] 4. Lower mold separation assembly; 40. Support rod; 41. Support frame; 42. Ejector mechanism; 43. T-bar; 44. Tension spring; 45. Limiting ring; 46. Connecting rod; 47. Ejector block; 48. Telescopic rod; 49. First return spring;

[0039] 5. Direction adjustment assembly; 50. Rotating seat; 51. Bevel gear; 52. Rotating shaft; 53. Linkage mechanism; 54. Ratchet; 55. Lifting rod; 550. Cavity; 56. Pawl; 57. Second return spring. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0041] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting 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.

[0042] 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", "inside", "outside" and the like indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate 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 limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0043] In the description of the present invention, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such 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 internal communication between two components or an interaction between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0044] like Figures 1 to 13 As shown:

[0045] An injection molding device for producing automotive trim includes a housing 1, which is used to support an injection molding assembly 2. The device also includes the injection molding assembly 2, an air stripping assembly 3, a lower mold separation assembly 4, and a direction adjustment assembly 5. The injection molding assembly 2 includes an upper mold base 20, an upper mold 21, a lower mold base 22, a lower mold 23, and a drive mechanism 24. The upper mold base 20 is vertically movably mounted on the housing 1 via the drive mechanism 24. The top of the upper mold 21 is fixedly connected to the bottom of the upper mold base 20. The lower mold 23 is horizontally rotatably mounted on the housing 1 via the direction adjustment assembly 5. The bottom of the lower mold 23 engages with a groove at the top of the lower mold base 22. When the drive mechanism 24 is activated, it drives the upper mold base 20 and the upper mold 21 downward, allowing the upper mold 21 and the lower mold 23 to fit together and close the molds. Molten plastic is then injected into the two molds for injection molding. After the molded part cools, the upper mold 21 is raised for demolding, completing the injection molding of the automotive trim. The pneumatic stripping assembly 3 includes an air pump 30, a hose 31, and a pair of leak-proof mechanisms 32. The bottom of the air pump 30 is fixedly connected to the bottom wall of the housing 1. The bottom wall of the lower mold 23 is provided with a pair of inflation holes 230, symmetrically distributed on either side of the lower mold 23. A three-way slot 231 is provided at one end of the lower mold 23, communicating with the inflation holes 230. One end of the hose 31 is connected to the air outlet of the air pump 30, and the other end of the hose 31 passes through the side wall of the housing 1 and communicates with the three-way slot 231. The provision of the hose 31 ensures that the air pump 30 is always connected to the lower mold 23, facilitating movement of the lower mold 23. The leak-proof mechanism 32 is installed in the inflation hole 230 and is used to prevent molten plastic from flowing into the inflation hole 230. The lower mold separation assembly 4 is mounted on the housing 1 and is used to drive the lower mold 23 to move vertically. During injection molding, after the mold is closed, the air hole 230 is blocked from the inside of the lower mold 23 by the leak-proof mechanism 32 to prevent molten plastic from flowing into the air hole 230 and causing blockage. After the injection molded part cools, the upper mold 21 is driven to separate from the lower mold 23 by the driving mechanism 24, and at the same time, the lower mold separation component 4 drives the lower mold 23 to separate from the lower mold base 22, and the first demoulding is performed. At this time, the injection molded part is easily adhered to the inner wall of the lower mold 23 due to factors such as pressure, and direct demoulding is likely to cause tearing. Subsequently, the lower mold base 22 is rotated by the direction adjustment component 5, and the mold is closed again. After the mold is closed, the injection molded part can be prevented from being blown out of the lower mold 23 and causing collisions. At this time, the air hole 230 is connected to the inside of the lower mold 23, and the air pump 30 is operated to inject air into the three-way groove 231 through the hose 31, and enter the gap between the injection molded part and the inner wall of the lower mold 23 through the air hole 230. By increasing the air pressure, the molded part is gradually separated from the inner wall of the lower mold 23, so that the molded part is subjected to slow and uniform force during the demolding process, preventing tearing at the adhesion point and improving the injection molding quality. Then, the mold is demolded again, and the molded part is easily ejected from the lower mold 23 through the demolding assembly to complete the injection molding.

[0046] like Figures 1 to 9 As shown:

[0047] The anti-leakage mechanism 32 includes a piston rod 33 and a thrust spring 34. The top of the piston rod 33 is slidably connected to the inflation hole 230. Two pairs of circular holes 220 are provided on the bottom wall of the lower mold base 22. The two pairs of circular holes 220 are distributed circumferentially on the lower mold base 22. The depths of the two pairs of circular holes 220 are different. The bottom of the piston rod 33 is plugged into the circular hole 220. One end of the thrust spring is fixedly connected to the side wall of the piston rod 33, and the other end of the thrust spring 34 is fixedly connected to the top wall of the inflation hole 230. When the mold is closed, the downward pressure provided by the thrust spring 34 causes the bottom of the piston rod 33 to be inserted into the circular hole 220, and the depth of the circular hole 220 corresponding to the piston rod 33 is adjusted by the direction adjustment component 5, thereby controlling the opening and closing of the inflation hole 230. When the two piston rods 33 are plugged into the other pair of circular holes 220, the tops of the piston rods 33 are flush with the bottom wall of the lower mold 23, and the inflation holes 230 are blocked by the three-way groove 231. At this time, during the first mold closing process, the piston rods 33 block the circular holes 220 to prevent molten plastic from pouring into the circular holes 220 and causing blockage. When the two piston rods 33 are plugged into one pair of circular holes 220, the tops of the piston rods 33 are located at the bottom of the three-way groove 231, and the inflation holes 230 are connected to the three-way groove 231. At this time, during the second mold closing process, the piston rods 33 are pushed open to allow air to enter the inflation holes 230 smoothly.

[0048] like Figures 1 to 8 As shown:

[0049] The drive mechanism 24 includes a motor 25, a screw 26, and a pair of guide rods 27. The bottom of the motor 25 is fixedly connected to the top of the housing 1. The screw 26 and guide rods 27 are both rotatably mounted between the top and bottom walls of the housing 1. The output shaft of the motor 25 passes through the top wall of the housing 1 and is coaxially connected to the top of the screw 26. A first thread groove 260 is defined on the periphery of the screw 26. One side of the upper mold base 20 is threadedly connected to the periphery of the first thread groove 260. The periphery of the guide rods 27 is slidably connected to the upper mold base 20. When the motor 25 is energized, its output shaft drives the screw 26 to rotate. Through the threaded transmission between the first thread groove 260 and the upper mold base 20, the upper mold base 20 drives the upper mold 21 to move up and down along the guide rods 27, thereby achieving the mold opening and closing operation.

[0050] like Figures 1 to 10 As shown:

[0051] The lower mold separation assembly 4 includes a pair of support rods 40, a support frame 41, and an ejection mechanism 42. One side of the support rod 40 is fixedly connected to the lower mold 23, and the other side of the support rod 40 is slidably connected to the outer periphery of the guide rod 27. The support frame 41 is mounted on the support rod 40 so as to be movable up and down via the ejection mechanism 42. A second thread groove 261 is formed on the outer periphery of the screw rod 26. The outer periphery of the second thread groove 261 is threadedly connected to one side of the support frame 41. The pitch of the second thread groove 261 is smaller than that of the first thread groove 260, and the second thread groove 261 and the first thread groove 260 are in the same direction. When the screw rod 26 rotates to drive the upper mold base 20 upward, the threaded transmission between the second thread groove 261 and the support frame 41 drives the support frame 41 and the support rod 40 to move upward simultaneously, causing the lower mold 23 to move upward and disengage from the groove on the lower mold base 22. At this time, the lower mold base 22 can be rotated to change its direction through the direction adjustment assembly 5. Furthermore, because the pitch of the second thread groove 261 is smaller than the pitch of the first thread groove 260, the upper mold 21 moves faster and farther than the lower mold 23, thereby separating the upper mold 21 and the lower mold 23 and preventing them from interfering with each other. The ejection mechanism 42 can also eject the molded part from the lower mold 23 for easier demoulding.

[0052] like Figures 1 to 10 As shown:

[0053] The ejection mechanism 42 includes a pair of T-shaped rods 43, a pair of tension springs 44, a pair of limiting rings 45, a pair of connecting rods 46 and a pair of ejection blocks 47. The bottom of the T-shaped rod 43 is fixedly connected to the top of the support frame 41, the T-shaped rod 43 passes through the support rod 40 and is slidably connected thereto, the tension spring 44 is sleeved on the outer periphery of the T-shaped rod 43, one end of the tension spring 44 is fixedly connected to the top of the T-shaped rod 43, the other end of the tension spring 44 is fixedly connected to the top of the support rod 40, the limiting ring 45 is fixedly connected to the outer periphery of the guide rod 27, the bottom of the limiting ring 45 and the top of the support rod 40 conflict with each other, one side of the connecting rod 46 is fixedly connected to the support frame 41, and a pair of sliding grooves 232 are opened on the bottom wall of the lower mold 23. The sliding grooves 232 are symmetrically distributed at both ends of the lower mold 23, the sliding grooves 232 are slidably connected to the ejection block 47, the other end of the connecting rod 46 passes through the side wall of the lower mold 23 and is slidably connected thereto, and the ejection block 47 can be vertically movably installed on the connecting rod 46. As the lower mold 23 moves upward, the support frame 41 drives the T-shaped rod 43 upward, and the tension provided by the tension spring 44 drives the support rod 40 and the lower mold 23 upward. The support rod 40 stops moving upward after it contacts the retaining ring 45. At this time, as the support frame 41 continues to move, the tension spring 44 is stretched, and the distance between the support frame 41 and the support rod 40 is reduced. One side of the connecting rod 46 slides within the lower mold 23 and drives the ejection block 47 upward, thereby ejecting the injection molded part.

[0054] like Figures 1 to 10 As shown:

[0055] The ejection mechanism 42 also includes a pair of telescopic rods 48 and a pair of first return springs 49. The bottom of the telescopic rods 48 is fixedly connected to the connecting rod 46, and the telescopic end of the telescopic rods 48 is fixedly connected to the bottom of the ejection block 47. The first return spring 49 is sleeved around the outer periphery of the telescopic rods 48, one end of the first return spring 49 is fixedly connected to the ejection block 47, and the other end of the first return spring 49 is fixedly connected to the connecting rod 46. During the first demolding, if the injection molded part sticks, direct ejection may easily cause it to tear. At this time, as the connecting rod 46 moves upward, the return springs are squeezed and shortened, and the telescopic rods 48 ensure that the return springs do not bend. The ejection block 47 remains stationary, preventing the injection molded part from tearing. During the second demolding, an air film is formed between the injection molded part and the lower mold 23 to prevent adhesion. Under the thrust of the return spring, the ejection block 47 can eject the injection molded part from the lower mold 23.

[0056] like Figures 1 to 13 As shown:

[0057] The direction adjustment assembly 5 includes a rotating base 50, a pair of bevel gears 51, a rotating shaft 52, and a linkage mechanism 53. The top of the rotating base 50 is fixedly connected to the bottom of the lower die base 22. The bottom of the rotating base 50 passes through the top wall of the housing 1 and is coaxially connected to one of the bevel gears 51. The two bevel gears 51 are meshed with each other. The other bevel gear 51 is coaxially connected to one end of the rotating shaft 52. The other end of the rotating shaft 52 is rotatably connected to the inner wall of the housing 1. The linkage mechanism 53 is mounted on the rotating shaft 52 and is used to drive the rotating shaft 52 to rotate when the support frame 41 rises. When the support frame 41 rises, the linkage assembly drives the rotating shaft 52 to rotate, and the meshing transmission of the two bevel gears 51 drives the rotating base 50 to rotate, thereby causing the lower die base 22 to rotate when the lower mold 23 rises, achieving direction adjustment.

[0058] like Figures 1 to 13 As shown:

[0059] The linkage mechanism 53 includes a ratchet 54, a lifting rod 55, multiple pawls 56 and multiple second return springs 57. The ratchet 54 is coaxially connected to the periphery of the rotating shaft 52. The top of the lifting rod 55 is fixedly connected to the bottom of the support frame 41. The bottom of the lifting rod 55 passes through the top wall of the shell 1 and is slidably connected thereto. One end of the lifting rod 55 is provided with multiple cavities 550. One end of the pawl 56 is rotatably connected to the inner wall of the cavity 550. The other end of the pawl 56 conflicts with the teeth on the ratchet 54. One end of the second return spring 57 is fixedly connected to the pawl 56, and the other end of the second return spring 57 is fixedly connected to the inner wall of the cavity 550. When the support frame 41 drives the lifting rod 55 to rise, the pawl 56 and the ratchet 54 conflict with each other. At this time, the spring is shortened to the limit, causing the ratchet 54 to rotate as the lifting rod 55 rises. When the lifting rod 55 descends, the pawl 56 and the ratchet 54 conflict with each other, causing the spring to pull up, and the pawl 56 rotates upward, so that the lower mold base 22 rotates 90 degrees when the lower mold 23 moves upward, so that the piston rod 33 moves from above a pair of circular holes 220 to above another pair of circular holes 220. When the lower mold 23 descends, the lower mold base 22 remains stationary to prevent the piston rod 33 from offsetting the circular holes 220.

[0060] like Figures 1 to 13 As shown:

[0061] The pawls 56 are located at the outer bottom of the lifting rod 55. This ensures that the ratchet 54 only engages the pawls 56 after the lifting rod 55 has moved upward a certain distance. This prevents the lower die base 22 from rotating and interfering with the lower die base 22 before the lower die 23 is released. When the lower die 23 engages the grooves in the lower die base 22, the ratchet 54 and pawls 56 separate, allowing the lower die base 22 to remain stationary and facilitate upward movement. When the lower die 23 separates from the lower die base 22, the ratchet 54 and pawls 56 interfere with each other. The lower die base 22 then rotates and changes direction to follow the movement of the lower die 23.

[0062] The present embodiment also provides an injection molding process for an injection molding device for producing automotive accessories, comprising the following steps: step 1: an injection molding assembly 2 is installed on the shell 1, which can drive the upper mold 21 to move downward to complete the first mold closing, and then inject the molten plastic between the upper mold 21 and the lower mold 23 for injection molding; step 2: after the injection molded part cools, the upper mold 21 is driven to move upward by the driving mechanism 24 installed on the shell 1 for the first demolding, and at the same time, the lower mold 23 is separated from the lower mold base 22 by the lower mold separation assembly 4 installed on the shell 1, so as to facilitate the rotation of the lower mold base 22; step 3: a direction adjustment assembly 5 is installed on the shell 1, and is used to drive the lower mold base 22 to rotate 90 degrees during the upward movement of the lower mold 23, and then perform the second mold closing; step 4: an inflation separation assembly is installed on the shell 1, which can inject air into the gap between the lower mold 23 and the injection molded part to completely separate them and improve the injection molding demolding effect; step 5: finally, the second demolding is performed, and the injection molded part is ejected from the lower mold 23 by the ejection mechanism 42 installed on the shell 1 for easy removal.

[0063] It should be noted that the above-described specific embodiments are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that various modifications, equivalent substitutions, and variations may be made to the present invention. However, as long as these modifications do not depart from the spirit of the present invention, they are intended to be within the scope of protection of the present invention. Furthermore, certain terms used in the specification and claims of this application are not intended to be limiting; they are intended solely to facilitate a clear description of the positional relationships and functions of various components.

Claims

1. An injection molding device for producing automobile accessories, comprising a housing (1), characterized in that: The invention also includes an injection molding component (2), an air stripping component (3), a lower mold separation component (4) and a direction adjustment component (5). The injection molding component (2) includes an upper mold base (20), an upper mold (21), a lower mold base (22), a lower mold (23) and a driving mechanism (24). The upper mold base (20) is vertically movable and mounted on the housing (1) through the driving mechanism (24). The top of the upper mold (21) is fixedly connected to the bottom of the upper mold base (20). The lower mold (23) is horizontally rotatable and mounted on the housing (1) through the direction adjustment component (5). The bottom of the lower mold (23) is plugged into the groove at the top of the lower mold base (22). The air stripping component (3) includes an air pump (30), a hose (31) and a pair of anti-leakage mechanisms (32). The air pump (30 ) bottom is fixedly connected to the bottom wall of the shell (1), a pair of inflation holes (230) are opened on the bottom wall of the lower mold (23), and the two inflation holes (230) are symmetrically distributed on both sides of the lower mold (23), and a three-way groove (231) is opened at one end of the lower mold (23), and the three-way groove (231) is connected to the inflation holes (230), one end of the hose (31) is connected to the air outlet of the air pump (30), and the other end of the hose (31) passes through the side wall of the shell (1) and is connected to the three-way groove (231), and a leak-proof mechanism (32) is installed in the inflation hole (230), and the leak-proof mechanism (32) is used to prevent molten plastic from flowing into the inflation hole (230), and a lower mold separation component (4) is installed on the shell (1), and the lower mold separation component (4) is used to drive the lower mold (23) to move vertically; The anti-leakage mechanism (32) includes a piston rod (33) and a thrust spring (34), the top of the piston rod (33) is slidably connected to the inflation hole (230), the bottom wall of the lower die base (22) is provided with two pairs of circular holes (220), the two pairs of circular holes (220) are circumferentially distributed on the lower die base (22), the bottom of the piston rod (33) is plugged into the circular holes (220), one end of the thrust spring is fixedly connected to the side wall of the piston rod (33), and the other end of the thrust spring (34) is fixedly connected to the top wall of the inflation hole (230); When the two piston rods (33) are plugged into the other pair of circular holes (220), the top of the piston rod (33) is flush with the bottom wall of the lower mold (23), and the inflation hole (230) is blocked from the three-way groove (231); When the two piston rods (33) are plugged into one of the pairs of circular holes (220), the top of the piston rod (33) is located at the bottom of the three-way groove (231), and the inflation hole (230) is connected to the three-way groove (231); The lower mold separation assembly (4) includes a pair of support rods (40), a support frame (41) and an ejection mechanism (42), one side of the support rod (40) is fixedly connected to the lower mold (23), and the other side of the support rod (40) is slidably connected to the periphery of the guide rod (27), and the support frame (41) is mounted on the support rod (40) so as to be movable up and down through the ejection mechanism (42), and a second thread groove (261) is provided on the periphery of the screw rod (26), and the periphery of the second thread groove (261) is threadedly connected to one side of the support frame (41), and the pitch of the second thread groove (261) is smaller than that of the first thread groove (260), and the second thread groove (261) and the first thread groove (260) have the same direction; The ejection mechanism (42) includes a pair of T-shaped rods (43), a pair of tension springs (44), a pair of limiting rings (45), a pair of connecting rods (46) and a pair of ejection blocks (47), wherein the bottom of the T-shaped rod (43) is fixedly connected to the top of the support frame (41), the T-shaped rod (43) passes through the support rod (40) and is slidably connected thereto, the tension spring (44) is sleeved on the periphery of the T-shaped rod (43), one end of the tension spring (44) is fixedly connected to the top of the T-shaped rod (43), the other end of the tension spring (44) is fixedly connected to the top of the support rod (40), the limiting ring (45) is fixedly connected to the top of the support rod (40), and the ) is fixedly connected to the outer periphery of the guide rod (27), the bottom of the limit ring (45) is in conflict with the top of the support rod (40), one side of the connecting rod (46) is fixedly connected to the support frame (41), and a pair of slide grooves (232) are provided on the bottom wall of the lower mold (23), and the slide grooves (232) are symmetrically distributed at both ends of the lower mold (23), and the slide grooves (232) are slidably connected to the ejection block (47), and the other end of the connecting rod (46) passes through the side wall of the lower mold (23) and is slidably connected thereto, and the ejection block (47) is vertically movably installed on the connecting rod (46); The ejection mechanism (42) further includes a pair of telescopic rods (48) and a pair of first return springs (49), wherein the bottom of the telescopic rod (48) is fixedly connected to the connecting rod (46), the telescopic end of the telescopic rod (48) is fixedly connected to the bottom of the ejection block (47), the first return spring (49) is sleeved on the outer periphery of the telescopic rod (48), one end of the first return spring (49) is fixedly connected to the ejection block (47), and the other end of the first return spring (49) is fixedly connected to the connecting rod (46).

2. The injection molding device for producing automobile accessories according to claim 1, characterized in that: The driving mechanism (24) includes a motor (25), a screw (26) and a pair of guide rods (27). The bottom of the motor (25) is fixedly connected to the top of the housing (1). The screw (26) and the guide rod (27) are both rotatably mounted between the top wall and the bottom wall of the housing (1). The output shaft of the motor (25) passes through the top wall of the housing (1) and is coaxially connected to the top of the screw (26). A first thread groove (260) is provided on the periphery of the screw (26). One side of the upper die base (20) is threadedly connected to the periphery of the first thread groove (260). The periphery of the guide rod (27) is slidably connected to the upper die base (20).

3. The injection molding device for producing automobile accessories according to claim 1, characterized in that: The direction adjustment assembly (5) includes a rotating seat (50), a pair of bevel gears (51), a rotating shaft (52) and a linkage mechanism (53). The top of the rotating seat (50) is fixedly connected to the bottom of the lower mold seat (22). The bottom of the rotating seat (50) passes through the top wall of the shell (1) and is coaxially connected to one of the bevel gears (51). The two bevel gears (51) are meshed with each other. The other bevel gear (51) is coaxially connected to one end of the rotating shaft (52). The other end of the rotating shaft (52) is rotatably connected to the inner wall of the shell (1). The linkage mechanism (53) is installed on the rotating shaft (52). The linkage mechanism (53) is used to drive the rotating shaft (52) to rotate when the support frame (41) rises.

4. The injection molding device for producing automobile accessories according to claim 3, characterized in that: The linkage mechanism (53) includes a ratchet (54), a lifting rod (55), a plurality of pawls (56) and a plurality of second return springs (57), the ratchet (54) is coaxially connected to the outer periphery of the rotating shaft (52), the top of the lifting rod (55) is fixedly connected to the bottom of the support frame (41), the bottom of the lifting rod (55) passes through the top wall of the shell (1) and is slidably connected thereto, a plurality of cavities (550) are opened at one end of the lifting rod (55), one end of the pawl (56) is rotatably connected to the inner wall of the cavity (550), the other end of the pawl (56) contacts the teeth on the ratchet (54), one end of the second return spring (57) is fixedly connected to the pawl (56), and the other end of the second return spring (57) is fixedly connected to the inner wall of the cavity (550).

5. The injection molding device for producing automobile accessories according to claim 4, characterized in that: The ratchet pawls (56) are all located at the outer bottom of the lifting rod (55); When the lower mold (23) is plugged into the groove on the lower mold base (22), the ratchet (54) and the pawl (56) are separated; When the lower mold (23) is separated from the lower mold base (22), the ratchet (54) and the pawl (56) conflict with each other.

6. An injection molding process using the injection molding device for producing automobile accessories according to any one of claims 1 to 5, characterized in that: The following steps are included: Step 1: An injection molding assembly (2) is installed on the housing (1), which can drive the upper mold (21) to move downward to complete the first mold closing, and then inject the molten plastic into the space between the upper mold (21) and the lower mold (23) for injection molding; Step 2: After the injection molded part cools down, the upper mold (21) is driven upward by the driving mechanism (24) installed on the housing (1) to perform the first demoulding. At the same time, the lower mold (23) is separated from the lower mold base (22) by the lower mold separation assembly (4) installed on the housing (1), so as to facilitate the rotation of the lower mold base (22); Step 3: The direction adjustment component (5) is installed on the housing (1) to drive the lower mold base (22) to rotate 90 degrees during the upward movement of the lower mold (23), and then perform the second mold closing; Step 4: An air-filled separation component is installed on the housing (1), which can inject air into the gap between the lower mold (23) and the injection molded part to completely separate them and improve the injection molding demoulding effect; Step 5: Finally, the second demoulding is performed, and the injection molded part is ejected from the lower mold (23) through the ejection mechanism (42) installed on the shell (1) for easy removal.

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