Injection mold forming structure of automobile plastic part

Abstract

The invention provides an automobile plastic part injection mold forming structure which comprises an upper mold, a lower mold and a push plate, a cavity used for part forming is formed between the upper mold and the lower mold, the push plate is fixedly connected with a push rod, the push rod is fixedly connected with the lower mold, the axial direction of the push rod is parallel to the height direction of the upper mold, and the axial direction of the push rod is parallel to the height direction of the lower mold. A sliding seat is arranged between the lower die and the push plate, an inclined sliding hole is formed in the lower die, a sliding groove is formed in the sliding seat, an inclined forming rod is connected to the sliding groove in a sliding mode, and one end, far away from the sliding groove, of the forming rod penetrates into the cavity along the sliding hole and is provided with a forming groove used for forming a convex part; the lower die moves in the direction away from the sliding seat, the forming rod moves in the length direction of the sliding groove while moving in the direction away from the cavity along the sliding hole, and the purpose of forming the convex part is achieved.

Description

Technical Field

[0001] The invention relates to a mould, in particular to a moulding structure of an injection mould for automobile plastic parts. Background Art

[0002] At present. A Chinese patent with the authorization announcement number CN218488980U discloses an injection mold, which includes a mold body and an injection runner arranged in the mold body, and the mold body includes a conformal cooling water channel group and multiple molding cavities; wherein each molding cavity can mold a product to be injection molded, and each molding cavity is connected to the injection runner, and the conformal cooling water channel group includes multiple accompanying cooling water channels, and the multiple accompanying cooling water channels enclose a cooling area, and at least part of the injection runner is placed in the cooling area. The accompanying cooling water channels of the injection mold are evenly arranged near the injection runner, and the key areas of the injection runner are cooled to improve the cooling effect, effectively ensure the consistency of the injection liquid flowing in the injection runner, and then keep the pouring rate consistent, improve the quality of the product to be injection molded, and ensure the consistency of the quality of the product to be injection molded.

[0003] However, for injection molding such as Figure 1 In the case of the part shown in the figure, the lower surface of the part has a convex portion, and the convex portion is inclined at an angle to the part. When using this injection mold to produce a part, the convex portion cannot be obtained during the movement of the upper mold of the mold body along the height direction. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a molding structure of an injection mold for automobile plastic parts to achieve the purpose of convex part molding.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: an automobile plastic part injection mold molding structure, comprising an upper mold, a lower mold, and a push plate, a cavity for part molding is formed between the upper mold and the lower mold, a push rod is fixedly connected to the push plate, the push rod is fixedly connected to the lower mold, the axial direction of the push rod is parallel to the height direction of the upper mold, a slide seat is arranged between the lower mold and the push plate, the lower mold is provided with an inclined sliding hole, the slide seat is provided with a sliding groove, the sliding groove is slidably connected with an inclined forming rod, the end of the forming rod away from the sliding groove penetrates into the cavity along the sliding hole and is provided with a forming groove for forming a convex portion; The lower die moves in a direction away from the slide seat, the forming rod moves along the slide hole in a direction away from the cavity, and at the same time, the forming rod moves along the length direction of the slide groove.

[0006] To implement the above technical solution, injection molding is performed on the cavity to obtain a part and a convex portion in the cavity, and the push plate drives the push rod to move along the length direction of the push rod, so that the lower mold moves away from the slide seat, and the forming rod moves along the length direction of the slide hole away from the cavity. At the same time, the forming rod moves along the length direction of the slide groove, so that the convex portion is demolded from the forming groove of the forming rod, thereby obtaining an inclined convex portion on the part.

[0007] As a preferred solution of the present invention, the end face of the forming rod is perpendicular to the length direction of the forming rod, the cross section of the slide groove is T-shaped, and the inner wall of the slide groove fits with the end of the forming rod.

[0008] By implementing the above technical solution, the forming rod is not easily separated from the sliding groove during the process of the forming rod moving along the sliding groove.

[0009] As a preferred solution of the present invention, a connecting hole connected to the mold cavity is provided on the forming rod, a one-way structure is provided on the connecting hole, a placement cavity is provided on the forming rod, a conduction seat is fixedly connected in the placement cavity, a one-way liquid inlet structure is provided on the conduction seat, one end of the one-way liquid inlet structure is connected to the connecting hole, and the other end of the one-way liquid inlet structure is connected to a storage box for storing a release agent, and the forming rod moves toward the direction close to the mold cavity and injects the release agent into the mold cavity along the connecting hole.

[0010] To implement the above technical solution, when the forming rod moves downward away from the cavity, the release agent is sucked from the storage box into the conduction seat through the one-way liquid inlet structure; when the forming rod moves toward the cavity, the release agent is injected into the cavity through the one-way structure. During the injection molding process, the one-way structure is set to avoid large-scale blocking of the connecting holes by the injection molding solution.

[0011] As a preferred solution of the present invention, the one-way liquid inlet structure includes a water inlet pipe, a water outlet pipe, a accommodating chamber, a fixed rod, and a piston. The water inlet pipe, the water outlet pipe, and the accommodating chamber are all opened on the conduction seat, and the two ends of the accommodating chamber are respectively connected with the water inlet pipe and the water outlet pipe, the water outlet pipe is connected with the connecting hole, the water inlet pipe is connected with the storage box, the piston is slidably connected to the inner wall of the accommodating chamber, one end of the fixed rod is fixed to the piston, and the other end of the fixed rod passes through the conduction seat and is fixedly connected to the inner wall of the sliding hole, the forming rod is provided with a square groove for moving the fixed rod, the end of the water inlet pipe close to the accommodating chamber is provided with a first one-way component, and the end of the water outlet pipe close to the accommodating chamber is provided with a second one-way component.

[0012] To implement the above technical solution, when the forming rod moves away from the cavity, the fixed rod moves along the length direction of the square groove, and the piston moves upward relative to the accommodating cavity. At this time, the release agent is sucked into the accommodating cavity from the water inlet pipe through the effect of negative pressure; after the part is demolded, the forming rod is moved toward the cavity, the piston moves downward relative to the accommodating cavity, and the release agent is pressed from the accommodating cavity into the water outlet pipe, and then injected into the cavity along the connecting hole to facilitate the next demolding of the convex part; the setting of the first one-way component and the second one-way component can prevent the release agent from flowing back.

[0013] As a preferred solution of the present invention, the first one-way component includes a first baffle ring and a first flap. The outer wall of the first baffle ring is fixed on the inner wall of the water inlet pipe and is located at one end of the water inlet pipe close to the accommodating cavity. The first flap is hinged to the side of the first baffle ring facing the accommodating cavity and is used to seal the first baffle ring.

[0014] To implement the above technical solution, during the process of the piston moving upward relative to the accommodating chamber, the first flap is opened due to the action of negative pressure, so that the release agent can pass through the first baffle ring and be placed in the accommodating chamber; when the piston stops moving, due to the action of gravity, the first flap covers the first baffle ring to seal the first baffle ring.

[0015] As a preferred solution of the present invention, the second one-way component includes a second baffle ring and a second flap. The outer wall of the second baffle ring is fixed on the inner wall of the water outlet pipe and is located at one end of the water outlet pipe close to the accommodating cavity. The second flap is hinged to the side of the second baffle ring away from the accommodating cavity and is used to seal the second baffle ring.

[0016] To implement the above technical solution, during the downward movement of the piston relative to the accommodating chamber, the second flap is opened from the second retaining ring by the action of pressure, and the release agent passes through the second retaining ring and is injected into the cavity from the water outlet pipe and the connecting hole; after the piston stops moving, the second flap is covered on the second retaining ring by the action of gravity to seal the second retaining ring.

[0017] As a preferred solution of the present invention, the one-way structure includes a T-shaped plate, a cross bar, a nut and an elastic member, the cross bar is fixed on the inner wall of the connecting hole, one end of the T-shaped plate passes through the cross bar and is fixedly connected to the nut, the upper surface of the T-shaped plate is flush with the cavity, one end of the elastic member is fixedly connected to the cross bar, and the other end of the elastic member is fixedly connected to the nut.

[0018] To implement the above technical solution, during the injection molding process, the connecting hole is blocked by a T-shaped plate to prevent the injection liquid from entering the connecting hole; the one-way liquid inlet structure can lift the T-shaped plate through the release agent to allow the release agent to be injected into the cavity, and then the T-shaped plate is reset by the elastic force of the elastic member.

[0019] As a preferred solution of the present invention, an energy storage cavity is provided on the inner wall of the connection hole, and an elastic membrane is fixedly connected to the inner wall of the energy storage cavity.

[0020] To implement the above technical solution, when the downward pressure of the third flap is greater than the pressure of the release agent, the elastic membrane is expanded to accommodate the release agent.

[0021] As a preferred solution of the present invention, a rack is fixedly connected to the inner wall of the sliding hole, the length direction of the rack is parallel to the length direction of the sliding hole, a rotating shaft is rotatably connected to the forming rod, a gear meshing with the rack is fixedly connected to the rotating shaft, a slide plate for blocking the connecting hole is slidably connected to the rotating shaft, the slide plate is located between the one-way structure and the energy storage cavity, and the rotating shaft rotates and causes the slide plate to reciprocate through the conduction component.

[0022] To implement the above technical solution, when the forming rod moves up along the sliding hole, the gear rolls and rotates along the rack, and the slide plate moves back and forth through the conduction component. When the slide plate moves forward, the slide plate blocks the connecting hole, and the release agent continues to be conducted along the connecting hole. At this time, the elastic membrane is deformed and generates a large elastic force. When the slide plate moves backward and moves away from the connecting hole, the elastic membrane contracts and sprays the release agent out of the connecting hole, so that the release agent can be sprayed over a larger area, thereby improving practicality.

[0023] As a preferred embodiment of the present invention, the conduction component includes a slider, a W-shaped groove, and a sleeve. The sleeve is arranged on the outside of the rotating shaft. The W-shaped groove is opened on the outer wall of the rotating shaft and is connected at both ends. One end of the slider is fixed on the sleeve, and the other end of the slider is slidably connected to the W-shaped groove. The sleeve is fixedly connected to the slider.

[0024] To implement the above technical solution, when the gear moves along the rack, the gear rotates, the gear drives the rotating shaft to rotate, the inner wall of the W-shaped groove contacts the slider, so that the slider drives the slide plate to move back and forth through the sliding sleeve.

[0025] In summary, the present invention has the following beneficial effects: 1. During the movement of the push plate, the push rod drives the upper die to move away from the lower die, and the forming rod moves along the sliding hole away from the cavity, thereby obtaining a convex portion; 2. When the forming rod moves toward the cavity, the release agent is injected into the cavity by the one-way liquid inlet structure, so as to realize the demoulding of the convex part from the forming rod; 3. During the conduction of the release agent in the connecting holes, the slide plate intermittently blocks the connecting holes so that the release agent can be sprayed intermittently to increase the spraying area. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the parts; Figure 2 It is a schematic diagram of the external structure of the present invention; Figure 3 To reflect Figure 2 A magnified image of point A; Figure 4 A schematic diagram showing the position of the sliding hole; Figure 5 To reflect the structural diagram of the chute; Figure 6 A cross-sectional schematic diagram showing a conductive seat; Figure 7 A schematic diagram showing the external structure of the formed rod; Figure 8 A schematic diagram showing the connection between the conductive base and the storage box; Fig. 9 To reflect Figure 8 A magnified view of point B; Fig.10 A schematic diagram showing the three-dimensional structure of the conductive seat; Fig.11 Schematic diagram of the structure of the conduction component.

[0027] Figure numerals: 1, part; 11, convex part; 21, lower die; 211, sliding hole; 22, push plate; 23, push rod; 3, slide seat; 31, slide groove; 32, forming rod; 33, connecting hole; 4, one-way structure; 41, T-shaped plate; 42, cross bar; 421, nut; 422, elastic member; 43, placement cavity; 50, conduction seat; 5, one-way liquid inlet structure; 51, water inlet pipe; 52, water outlet pipe; 53, accommodating cavity; 54, fixed Rod; 541, square groove; 55, piston; 61, first one-way component; 62, first baffle ring; 63, first flap; 64, second one-way component; 65, second baffle ring; 66, second flap; 7, energy storage chamber; 71, elastic membrane; 72, rack; 73, rotating shaft; 74, gear; 75, slide plate; 76, placement groove; 77, straight groove; 8, transmission component; 81, slider; 82, W-shaped groove; 83, sleeve; 9, storage box. DETAILED DESCRIPTION

[0028] The following is combined with Figure 2 -Attached Fig.11 , the specific implementation methods of the present invention are further described in detail to make the technical solution of the present invention easier to understand and grasp.

[0029] A molding structure of an injection mold for automobile plastic parts includes an upper mold (not shown in the figure), a lower mold 21, and a push plate 22. A cavity for molding a part 1 is formed between the upper mold and the lower mold 21, and four vertically arranged push rods 23 are fixedly connected to the push plate 22. The push rods 23 are fixedly connected to the lower mold 21, and the axial direction of the push rods 23 is arranged along the height direction of the lower mold 21 and the upper mold.

[0030] A slide seat 3 is arranged between the lower mold 21 and the push plate 22. The position of the slide seat 3 remains unchanged and is fixed on the injection molding machine. An inclined sliding hole 211 is provided in the lower mold 21, and a forming rod 32 is slidably connected to the sliding hole 211. One end of the forming rod 32 penetrates into the mold cavity along the sliding hole 211 and is provided with a forming groove for forming the convex portion 11.

[0031] The end surface of the forming rod 32 away from the cavity is perpendicular to the length direction of the forming rod 32; an inclined slide groove 31 is provided on the slide seat 3, and the cross section of the slide groove 31 is T-shaped. The end of the forming rod 32 away from the cavity is slidably connected to the slide groove 31. The inner wall of the slide groove 31 is in contact with the end of the forming rod 32.

[0032] The push plate 22 moves upward, and the push rod 23 drives the lower mold 21 to move upward, and the lower mold 21 moves away from the slide seat 3. The forming rod 32 moves along the slide hole 211 away from the cavity, and at the same time, the forming rod 32 moves along the length direction of the slide groove 31, so that the part 1 can be obtained in the cavity, and the convex portion 11 can be obtained on the part 1.

[0033] A connecting hole 33 connected to the cavity is provided at the upper end of the forming rod 32, and a one-way structure 4 is provided on the connecting hole 33. The one-way structure 4 includes a T-shaped plate 41, a cross bar 42, a nut 421 and an elastic member 422. The cross bar 42 is fixed to the inner wall of the connecting hole. The lower end of the T-shaped plate 41 passes through the cross bar 42 and is fixedly connected to the nut 421; the upper surface of the T-shaped plate 41 is flush with the cavity. One end of the elastic member 422 is fixedly connected to the cross bar 42, and the other end of the elastic member 422 is fixedly connected to the nut 421. The elastic member 422 is a spring. The nut 421 serves to prevent the T-shaped plate 41 from falling off the cross bar 42.

[0034] A placement cavity 43 is provided on the forming rod 32, and a conduction seat 50 is fixedly connected in the placement cavity 43. A one-way liquid inlet structure 5 is provided on the conduction seat 50, and one end of the one-way liquid inlet structure 5 is connected to the connecting hole 33, and the other end of the one-way liquid inlet structure 5 is connected to a storage box 9 for storing a release agent, so as to inject the release agent from the storage box 9 into the cavity.

[0035] The one-way liquid inlet structure 5 includes an inlet pipe 51, an outlet pipe 52, a receiving chamber 53, a fixing rod 54, and a piston 55. The inlet pipe 51, the outlet pipe 52, and the receiving chamber 53 are all disposed on the conductive seat 50, and the two ends of the receiving chamber 53 are respectively connected to the inlet pipe 51 and the outlet pipe 52, and the receiving chamber 53 is located between the inlet pipe 51 and the outlet pipe 52. The outlet pipe 52 is connected to the connecting hole 33; the inlet pipe 51 is connected to the storage box 9.

[0036] The piston 55 is slidably connected to the inner wall of the accommodating chamber 53. The fixing rod 54 is L-shaped, and one end of the fixing rod 54 is fixed to the piston 55. The other end of the fixing rod 54 passes through the conductive seat 50 and is fixedly connected to the inner wall of the sliding hole 211. A square groove 541 for the fixing rod 54 to move is provided on the forming rod 32. The square groove 541 is connected to the placement chamber 43.

[0037] A first one-way component 61 is disposed at one end of the water inlet pipe 51 close to the accommodating chamber 53 , and a second one-way component 64 is disposed at one end of the water outlet pipe 52 close to the accommodating chamber 53 .

[0038] The first one-way component 61 includes a first baffle ring 62 and a first flap 63. The outer wall of the first baffle ring 62 is fixed to the inner wall of the water inlet pipe 51 and is located at one end of the water inlet pipe 51 close to the accommodating chamber 53, and the first baffle ring 62 is slightly inclined. The first flap 63 is hinged to the side of the first baffle ring 62 facing the accommodating chamber 53 and is used to block the first baffle ring 62. Due to gravity, the first flap 63 covers the first baffle ring 62.

[0039] The second one-way component 64 includes a second baffle ring 65 and a second flap 66. The outer wall of the second baffle ring 65 is fixed to the inner wall of the outlet pipe 52 and is located at one end of the outlet pipe 52 close to the accommodating chamber 53. The second flap 66 is hinged to the side of the second baffle ring 65 away from the accommodating chamber 53 and is used to block the second baffle ring 65. The second baffle ring 65 is slightly inclined, and due to gravity, the second flap 66 covers the second baffle ring 65.

[0040] Accordingly, the push plate 22 moves upward, the push rod 23 drives the lower mold 21 to move upward, and the forming rod 32 moves away from the mold cavity, thereby realizing the process of demolding the protrusion 11 from the forming rod 32. At the same time, the fixing rod 54 moves along the length direction of the square groove 541, and the piston 55 moves upward relative to the accommodating cavity 53. At this time, the release agent is sucked into the accommodating cavity 53 from the water inlet pipe 51 through the first one-way component 61 through the negative pressure. When the piston 55 stops moving, the first flap 63 covers the first retaining ring 62 due to gravity.

[0041] The upper mold moves away from the lower mold 21, the mold cavity opens, and after the part 1 is removed from the mold cavity, the push plate 22 moves downward, the forming rod 32 moves toward the mold cavity, and the piston 55 moves downward relative to the accommodating cavity 53. The mold release agent passes through the second one-way component 64 from the accommodating cavity 53 and is pressed into the water outlet pipe 52, and then injected into the mold cavity along the connecting hole 33, so as to facilitate the next demolding of the protrusion 11. When the piston 55 stops moving, the second flap 66 covers the second retaining ring 65 due to gravity. The arrangement of the first one-way component 61 and the second one-way component 64 can prevent the mold release agent from flowing back.

[0042] In order to facilitate installation, the formed rod 32 is fixed by splicing two left and right parts.

[0043] An energy storage cavity 7 with a circular cross section is provided on the inner wall of the connection hole 33, and an elastic membrane 71 is fixedly connected to the inner wall of the energy storage cavity 7. The elastic membrane 71 is made of a silicone rubber membrane.

[0044] A rack 72 is fixedly connected to the inner wall of the slide hole 211, and the length direction of the rack 72 is parallel to the length direction of the slide hole 211. A rotating shaft 73 is rotatably connected to the forming rod 32 through a bearing, and a gear 74 meshing with the rack 72 is fixedly connected to the rotating shaft 73, and the gear 74 is coaxially arranged with the rotating shaft 73.

[0045] A slide plate 75 for blocking the connection hole 33 is slidably connected to the rotating shaft 73, and the slide plate 75 is located between the one-way structure 4 and the energy storage chamber 7. The rotating shaft 73 rotates and the slide plate 75 reciprocates through the conductive component 8. A placement groove 76 and a straight groove 77 are connected on the side wall of the forming rod 32. The straight groove 77 is U-shaped and connected to the connection hole 33. The conductive component 8 is located in the placement groove 76.

[0046] The conducting assembly 8 comprises a slider 81, a W-shaped groove 82, and a sleeve 83. The sleeve 83 is sleeved on the outside of the rotating shaft 73, and the W-shaped groove 82 is opened on the outer wall of the rotating shaft 73 and the two ends are connected. One end of the slider 81 is fixed on the sleeve 83, and the other end of the slider 81 is slidably connected to the W-shaped groove 82. The sleeve 83 is fixedly connected to the slide plate 75.

[0047] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A molding structure of an automobile plastic part injection mold, comprising an upper mold, a lower mold (21), and a push plate (22), wherein a cavity for molding a part (1) is formed between the upper mold and the lower mold (21), a push rod (23) is fixedly connected to the push plate (22), the push rod (23) is fixedly connected to the lower mold (21), and the axial direction of the push rod (23) is parallel to the height direction of the upper mold, wherein: A slide seat (3) is arranged between the lower die (21) and the push plate (22); the lower die (21) is provided with an inclined slide hole (211); a slide groove (31) is provided on the slide seat (3); an inclined forming rod (32) is slidably connected to the slide groove (31); an end of the forming rod (32) away from the slide groove (31) penetrates into the mold cavity along the slide hole (211) and is provided with a forming groove for forming the convex portion (11); The lower mold (21) moves in a direction away from the slide seat (3), and the forming rod (32) moves along the slide hole (211) in a direction away from the mold cavity. At the same time, the forming rod (32) moves along the length direction of the slide groove (31).

2. The automotive plastic part injection mold molding structure according to claim 1, characterized in that: The end face of the forming rod (32) is arranged perpendicular to the length direction of the forming rod (32), the cross section of the slide groove (31) is arranged in a T-shape, and the inner wall of the slide groove (31) is fitted with the end of the forming rod (32).

3. The automotive plastic part injection mold molding structure according to claim 1, characterized in that: The forming rod (32) is provided with a connecting hole (33) connected to the mold cavity, the connecting hole (33) is provided with a one-way structure (4), the forming rod (32) is provided with a placement cavity (43), a conduction seat (50) is fixedly connected in the placement cavity (43), a one-way liquid inlet structure (5) is provided on the conduction seat (50), one end of the one-way liquid inlet structure (5) is connected to the connecting hole (33), and the other end of the one-way liquid inlet structure (5) is connected to a storage box (9) for storing a release agent, and the forming rod (32) moves in a direction close to the mold cavity and allows the release agent to be injected into the mold cavity along the connecting hole (33).

4. The automotive plastic part injection mold molding structure according to claim 3 is characterized in that: The one-way liquid inlet structure (5) comprises a water inlet pipe (51), a water outlet pipe (52), a accommodating chamber (53), a fixing rod (54), and a piston (55). The water inlet pipe (51), the water outlet pipe (52), and the accommodating chamber (53) are all arranged on the conductive seat (50). The two ends of the accommodating chamber (53) are respectively connected to the water inlet pipe (51) and the water outlet pipe (52). The water outlet pipe (52) is connected to the connecting hole (33). The water inlet pipe (51) is connected to the storage box (9). The piston (55) is slidably connected to the storage box (9). On the inner wall of the accommodating chamber (53), one end of the fixing rod (54) is fixed to the piston (55), the other end of the fixing rod (54) passes through the conductive seat (50) and is fixedly connected to the inner wall of the sliding hole (211), a square groove (541) for moving the fixing rod (54) is provided on the forming rod (32), a first one-way component (61) is provided at one end of the water inlet pipe (51) close to the accommodating chamber (53), and a second one-way component (64) is provided at one end of the water outlet pipe (52) close to the accommodating chamber (53).

5. The automotive plastic part injection mold molding structure according to claim 4, characterized in that: The first one-way component (61) comprises a first baffle ring (62) and a first flap (63); the outer wall of the first baffle ring (62) is fixed to the inner wall of the water inlet pipe (51) and is located at one end of the water inlet pipe (51) close to the accommodating chamber (53); the first flap (63) is hinged to the side of the first baffle ring (62) facing the accommodating chamber (53) and is used to block the first baffle ring (62).

6. The automotive plastic part injection mold molding structure according to claim 5, characterized in that: The second one-way component (64) comprises a second baffle ring (65) and a second flap (66); the outer wall of the second baffle ring (65) is fixed to the inner wall of the water outlet pipe (52) and is located at one end of the water outlet pipe (52) close to the accommodating chamber (53); the second flap (66) is hinged to a side of the second baffle ring (65) away from the accommodating chamber (53) and is used to block the second baffle ring (65).

7. The automotive plastic part injection mold molding structure according to claim 6, characterized in that: The one-way structure (4) comprises a T-shaped plate (41), a cross bar (42), a nut (421) and an elastic member (422); the cross bar (42) is fixed to the inner wall of the connecting hole (33); one end of the T-shaped plate (41) passes through the cross bar (42) and is fixedly connected to the nut (421); the upper surface of the T-shaped plate (41) is flush with the cavity; one end of the elastic member (422) is fixedly connected to the cross bar (42); and the other end of the elastic member (422) is fixedly connected to the nut (421).

8. The automotive plastic part injection mold molding structure according to claim 7, characterized in that: An energy storage cavity (7) is provided on the inner wall of the connection hole (33), and an elastic membrane (71) is fixedly connected to the inner wall of the energy storage cavity (7).

9. The automotive plastic part injection mold molding structure according to claim 8, characterized in that: A rack (72) is fixedly connected to the inner wall of the sliding hole (211), and the length direction of the rack (72) is parallel to the length direction of the sliding hole (211). A rotating shaft (73) is rotatably connected to the forming rod (32), and a gear (74) meshing with the rack (72) is fixedly connected to the rotating shaft (73). A slide plate (75) for blocking the connecting hole (33) is slidably connected to the rotating shaft (73), and the slide plate (75) is located between the one-way structure (4) and the energy storage cavity (7). The rotating shaft (73) rotates and causes the slide plate (75) to reciprocate through the transmission component (8).

10. The automotive plastic part injection mold molding structure according to claim 9, characterized in that: The conduction component (8) comprises a slider (81), a W-shaped groove (82), and a sliding sleeve (83); the sliding sleeve (83) is sleeved on the outside of the rotating shaft (73); the W-shaped groove (82) is opened on the outer wall of the rotating shaft (73) and is connected at both ends; one end of the slider (81) is fixed on the sliding sleeve (83); the other end of the slider (81) is slidably connected to the W-shaped groove (82); and the sliding sleeve (83) is fixedly connected to the slide plate (75).

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