Automobile insert injection mold

Abstract

The invention relates to the technical field of injection molding demolding, in particular to an automobile insert injection mold which comprises a mold body, a rear mold plate and a movable mold, the rear mold plate is fixedly arranged on the mold body, the movable mold is movably arranged in the mold body, and a forming groove is formed in the rear mold plate; the movable mold comprises a first ejector plate and a second ejector plate which are located below the rear mold plate and move in the vertical direction, a first ejector pin is arranged on the first ejector plate, a second ejector pin is arranged on the second ejector plate, and in the initial state, an ejector head of the first ejector pin does not stretch into the forming groove, and an ejector head of the second ejector pin stretches into the forming groove. The first ejector plate for driving the first ejector pin and the second ejector plate for driving the second ejector pin are arranged, and the top of the second ejector pin extends into the rear mold plate forming groove, so that a product is coated on the top of the second ejector pin after being cooled. During demolding, the first ejector plate and the second ejector plate act synchronously to drive the corresponding ejector pins to eject the product, and at the moment, the second ejector pin plays a limiting role, so that the product is effectively prevented from deviating towards a core-pulling or inclined ejection direction.

Description

Technical Field

[0001] This invention relates to the field of injection molding demolding technology, and more particularly to an injection mold for automotive inserts. Background Technology

[0002] Injection molding is a process that uses molten plastic to create a semi-finished product of a specific shape through injection, pressure holding, cooling, and demolding. For products with snap-fit ​​structures, compact mold designs are typically used to reduce mold and manufacturing costs, necessitating the use of core pulls or angled ejectors for snap-fit ​​demolding. However, automotive inserts often use PP+30GF material, which has a high shrinkage rate and is easily deformed. Furthermore, these products typically have a wall thickness of 1.5mm to 2.0mm and a length of 300mm to 600mm. During ejection, the snap-fit ​​components can easily stick to the core pull or angled ejector, causing the product's position to shift and making it difficult for gripping equipment to accurately grasp the product. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an injection mold for automotive inserts that can prevent product displacement during demolding.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an automotive insert injection mold, comprising a mold body, a rear template, and a moving mold, wherein the rear template is fixedly disposed on the mold body, and the moving mold is movably disposed within the mold body; the rear template has a molding groove; the moving mold includes a first top plate and a second top plate located below the rear template and moving vertically; the first top plate is provided with a first ejector pin, and the second top plate is provided with a second ejector pin; initially, the tip of the first ejector pin does not extend into the molding groove, and the tip of the second ejector pin extends into the molding groove.

[0005] Furthermore, the moving mold has a transmission component on its side. The transmission component includes a hook disposed between the first top plate and the second top plate, and a slider disposed between the hook and the first top plate. The lower end of the hook is fixedly connected to the second top plate, and the slider is slidably connected to the first top plate. The slider has a first position connected to the upper end of the hook and a second position disconnected from the upper end of the hook. When the hook is in the first position, the first top plate drives the second top plate to rise and fall synchronously. When the hook is in the second position, the first top plate is disconnected from the second top plate and rises and falls independently.

[0006] Furthermore, the transmission component also includes a guide block whose lower end is fixedly disposed on the mold body, and the upper end of the guide block is provided with a push head protruding along one side of the slider. A first elastic element for keeping the slider in a first position is connected between the slider and the first top plate. When the slider contacts the push head, it forces the hook to slide to the second position.

[0007] Furthermore, the upper end of the hook is provided with a hook head connected to the slider, and the lower end is provided with a transmission block for fixed connection with the second top plate. The hook is slidably sleeved on the guide block. The first top plate is located above the second top plate. The side wall of the first top plate is provided with a sliding groove. The slider is slidably connected in the sliding groove. The first elastic element is connected between the sliding groove and the slider. The end of the slider near the hook is provided with a lifting head. When the hook is in the first position, the lower end face of the hook abuts against the lifting head.

[0008] Furthermore, the pushing head is provided with a first guide slope, and the lifting head is provided with a second guide slope that is adapted to the first guide slope.

[0009] Furthermore, the groove opening is provided with a first limiting block that only allows the lifting head to extend out of the groove.

[0010] Furthermore, the length of the tip of the second ejector pin extending into the molding groove is 0.4 mm to 0.6 mm.

[0011] Furthermore, the first top plate includes a first upper top plate and a first lower top plate connected below the first upper top plate. The tail end of the first ejector pin is T-shaped or L-shaped and is connected to the first lower top plate. The first upper top plate is provided with a first snap-fit ​​groove that is adapted to the tail end of the first ejector pin.

[0012] Furthermore, the second top plate includes a second upper top plate and a second lower top plate connected below the second upper top plate. The tail end of the second ejector pin is T-shaped or L-shaped and is connected to the second lower top plate. The second upper top plate is provided with a second snap-fit ​​groove that is adapted to the tail end of the second ejector pin.

[0013] Furthermore, the aforementioned automotive insert injection mold also includes a second elastic element, which includes a guide pin and a spring sleeved on the guide pin. The first top plate is slidably disposed on the guide pin, and the spring is located between the rear template and the first top plate.

[0014] The beneficial effects of this invention are as follows: In the moving mold structure of an automotive insert injection mold, a first ejector plate is provided to drive a first ejector pin and a second ejector plate to drive a second ejector pin, and the tip of the second ejector pin extends into the forming groove of the rear mold plate, so that the product covers the tip of the second ejector pin after cooling. During demolding, the first and second ejector plates move synchronously, driving the corresponding ejector pins to eject the product. At this time, the second ejector pin acts as a limit, effectively preventing the product from shifting towards the core-pulling or angled ejector direction. After the product is completely separated from the core-pulling or angled ejector, the second ejector plate stops moving, while the first ejector plate continues to push the first ejector pin forward, so that the product finally separates from the second ejector pin, thereby achieving complete demolding on the rear mold plate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an automotive insert injection mold structure proposed in this invention; Figure 2 This is a schematic diagram of the moving mold structure of an automotive insert injection mold proposed in this invention; Figure 3 This is a schematic cross-sectional view of an automotive insert injection mold proposed in this invention. Figure 4 for Figure 3 An enlarged view of the first top plate of part A of an automotive insert injection mold in the lifted state; Figure 5 for Figure 3 An enlarged view of the first ejector plate of part A of an automotive insert injection mold in an unerupted state; Figure 6 for Figure 2 Enlarged view of part B of an automotive insert injection mold; Figure 7 This is a schematic diagram of the assembly structure of the second ejector pin and the second ejector plate of an automotive insert injection mold proposed in this invention; Figure 8 for Figure 7 Enlarged view of section C of an automotive insert injection mold; Figure 9 This is a schematic diagram of the assembly structure of the first ejector pin and the first ejector plate of an automotive insert injection mold proposed in this invention; Label Explanation: 1. Post-template; 2. First top plate; 21. First ejector pin; 22. Slide groove; 23. First elastic element; 24. First limiting block; 25. First upper top plate; 251. First locking groove; 26. First lower top plate; 3. Second top plate; 31. Second ejector pin; 32. Second upper top plate; 321. Second locking groove; 33. Second lower top plate; 34. Second limiting block; 35. Clearance hole; 4. Transmission components; 41. Hook; 411. Hanging head; 412. Transmission block; 42. Slider; 421. Lifting head; 43. Guide block; 431. Pushing head; 5. First guide ramp; 6. Second guide ramp; 7. Push rod; 8. Second elastic element; 81. Guide pin; 82. Spring; 9. Mold body; 10. Product. Detailed Implementation

[0016] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0017] For products with snap-fit ​​structures, compact mold designs are typically used to reduce mold and manufacturing costs, necessitating the use of core-pulling or angled ejectors for snap-fit ​​demolding. However, automotive inserts often use PP+30GF material, which has a high shrinkage rate and is easily deformed. Furthermore, these products typically have a wall thickness of 1.5mm to 2.0mm and a length of 300mm to 600mm. During ejection, the snap-fit ​​can easily stick to the core-pulling or angled ejector, causing positional displacement and making it difficult for the gripping equipment to accurately grasp the product. In this embodiment, the moving mold structure of the automotive insert injection mold includes a first ejector plate 2 that drives the first ejector pin 21 and a second ejector plate 3 that drives the second ejector pin 31. The tip of the second ejector pin 31 extends into the forming groove of the rear mold plate 1, allowing the product 10 to wrap around the tip of the second ejector pin 31 after cooling. During demolding, the first ejector plate 2 and the second ejector plate 3 move synchronously, driving the corresponding ejector pins to eject the product 10. At this time, the second ejector pin 31 acts as a limit, effectively preventing the product 10 from shifting towards the core-pulling or angled ejector direction.

[0018] Please refer to Figure 1 , Figure 2 , Figure 7 and Figure 9 As shown, the present invention provides an automotive insert injection mold, comprising a rear template 1 and a moving mold. The top surface of the rear template 1 has a molding groove. The moving mold includes a first top plate 2 and a second top plate 3 located below the rear template 1 and moving vertically. The first top plate 2 is provided with a first ejector pin 21 that passes through the rear template 1 to eject the product 10 out of the molding groove. The second top plate 3 is provided with a second ejector pin 31, the tip of which passes through the rear template 1 and extends into the molding groove.

[0019] Working principle: A first top plate 2 drives the first ejector pin 21 and a second top plate 3 drives the second ejector pin 31. The tip of the second ejector pin 31 extends into the forming groove of the rear mold plate 1, so that the product 10 covers the tip of the second ejector pin 31 after cooling. During demolding, the first top plate 2 and the second top plate 3 move synchronously, driving the corresponding ejector pins to push the product 10 out. At this time, the second ejector pin 31 acts as a limit, effectively preventing the product 10 from shifting towards the core-pulling or angled ejector direction. After the product 10 is completely separated from the core-pulling or angled ejector, the second top plate 3 stops moving, while the first top plate 2 continues to push the first ejector pin 21 forward, so that the product 10 finally separates from the second ejector pin 31, thereby achieving complete demolding of the product 10 on the rear mold plate 1.

[0020] It is worth noting that, please refer to Figure 8As shown, the length of the tip of the second ejector pin 31 extending into the molding groove is D, where D is 0.4mm to 0.6mm. By limiting the length of D, the external shape quality of the product 10 is ensured while guaranteeing the limiting effect of the second ejector pin 31 on the product 10. Of course, the length of D includes, but is not limited to, 0.4mm, 0.5mm, and 0.6mm. The tip of the first ejector pin 21 is flush with the lower surface of the molding groove. The tip of the first ejector pin 21 may also be lower than the lower surface of the molding groove.

[0021] In some implementations, please refer to Figures 3 to 5 As shown, the moving mold has a transmission component 4 on its side. The transmission component includes a hook 41 disposed between the first top plate 2 and the second top plate 3 and a slider 42 disposed between the hook 41 and the first top plate 2. The lower end of the hook 41 is fixedly connected to the second top plate 3, and the slider 42 is slidably connected to the first top plate 2. The slider 42 has a first position connected to the upper end of the hook 41 and a second position disconnected from the upper end of the hook 41. When the hook 41 is in the first position, the first top plate 2 drives the second top plate 3 to rise and fall synchronously. When the hook 41 is in the second position, the first top plate 2 is disconnected from the second top plate 3 and rises and falls independently. During the demolding process, the hook 41 will first be in the first position of the slider 42, so that the first top plate 2 drives the second top plate 3 to rise and fall synchronously. That is, the first ejector pin 21 and the second ejector pin 31 eject the product 10 synchronously, and the second ejector pin 31 plays a limiting role, effectively preventing the product 10 from shifting towards the core pulling or angled ejection direction. After the product 10 is completely separated from the core pulling or angled ejection, the hook 41 will be in the second position of the slider 42. The first top plate 2 will detach from the second top plate 3 and rise and fall independently. That is, the first ejector pin 21 ejects the product 10 alone, so that the product 10 is separated from the second ejector pin 31, thereby realizing the complete demolding of the product 10 on the rear template 1.

[0022] In some implementations, please refer to Figures 3 to 5 As shown, the transmission component 4 also includes a guide block 43 with its lower end fixedly mounted on the mold body 9. The upper end of the guide block 43 is provided with a push head 431 protruding along one side of the slider 42. A first elastic element 23 is connected between the slider 42 and the first top plate 2 to keep the slider 42 in a first position. When the slider 42 contacts the push head 431, it forces the hook 41 to slide to a second position. When the product 10 is completely separated from the core puller or the angled top, the push head 431 on the guide block 43 will contact the slider 42, and the slider 42 will move and compress the first elastic element 23, so that the hook 41 is in the second position of the slider 42.

[0023] It is worth noting that the first elastic element 23 can be a compression spring, nitrogen spring, or other component that provides elastic force.

[0024] In some implementations, please refer to Figures 3 to 5As shown, the upper end of the hook 41 is provided with a hook head 411 connected to the slider 42, and the lower end is provided with a transmission block 412 for fixed connection with the second top plate 3. The hook 41 is slidably sleeved on the guide block 43. The first top plate 2 is located above the second top plate 3. The side wall of the first top plate 2 is provided with a groove 22. The slider 42 is slidably connected in the groove 22. The first elastic element 23 is connected between the groove 22 and the slider 42. The end of the slider 42 near the hook 41 is provided with a lifting head 421. When the hook 41 is in the first position, the lower end face of the hook head 411 abuts against the lifting head 421. When the slider 42 contacts the pushing head 431, the pushing head 431 will push the slider 42 to move into the groove 22, so that the hook head 411 gradually disengages from the lifting head 421, thereby realizing the independent lifting and lowering of the first top plate 2 from the second top plate 3.

[0025] In some implementations, please refer to Figure 4 and Figure 5 As shown, the push head 431 is provided with a first guide slope 5, and the lifting head 421 is provided with a second guide slope 6 that is adapted to the first guide slope 5. The cooperation between the first guide slope 5 and the second guide slope 6 facilitates the push head 431 to push the slider 42 to move.

[0026] It is worth noting that the lifting head 421 is provided with a second guide slope 6, and the hanging head 411 abuts against the second guide slope 6, so that the hanging head 411 does not need to be completely separated from the lifting head 421 during the process of the slider 42 being gradually pushed into the slide groove 22, and can prevent the second ejector pin 31 from continuing to be ejected, and also facilitates the subsequent reset of the moving mold.

[0027] In some implementations, please refer to Figure 6 As shown, a first limiting block 24 is provided at the opening of the slide groove 22, allowing only the lifting head 421 to extend out of the slide groove 22. By providing the first limiting block 24 at the opening of the slide groove 22, the slider 42 is prevented from disengaging from the slide groove 22.

[0028] In some implementations, please refer to Figure 9 As shown, the first top plate 2 includes a first upper top plate 25 and a first lower top plate 26 connected below the first upper top plate 25. The tail end of the first ejector pin 21 is T-shaped or L-shaped and is connected to the first lower top plate 26. The first upper top plate 25 is provided with a first snap-fit ​​groove 251 that matches the tail end of the first ejector pin 21. Connecting the tail end of the first ejector pin 21 to the first lower top plate 26, setting the tail end to a T-shaped or L-shaped form, and providing a matching first snap-fit ​​groove 251 on the first upper top plate 25 improves the installation reliability of the first ejector pin 21 on the first top plate 2.

[0029] In some implementations, please refer to Figure 7As shown, the second top plate 3 includes a second upper top plate 32 and a second lower top plate 33 connected below the second upper top plate 32. The tail end of the second ejector pin 31 is T-shaped or L-shaped and is connected to the second lower top plate 33. The second upper top plate 32 is provided with a second snap-fit ​​groove 321 that matches the tail end of the second ejector pin 31. By connecting the tail end of the second ejector pin 31 to the second lower top plate 33, setting the tail end to a T-shaped or L-shaped configuration, and providing a matching second snap-fit ​​groove 321 on the second upper top plate 32, the installation reliability of the second ejector pin 31 on the second top plate 3 is improved.

[0030] In some implementations, please refer to Figure 2 As shown, the second top plate 3 is provided with a second limiting block 34 that penetrates the first top plate 2. During the process of the second top plate 3 moving towards the rear template 1, the second limiting block 34 is used to prevent the second top plate 3 from moving beyond its travel range.

[0031] In some implementations, please refer to Figure 3 As shown, the aforementioned automotive insert injection mold also includes an ejector pin 7. A clearance hole 35 is provided on the second top plate 3, and the ejector pin 7 passes through the clearance hole 35 to contact the first top plate 2. By using the ejector pin 7 passing through the clearance hole 35, the first top plate 2 can be driven to move towards the rear template 1.

[0032] In some implementations, please refer to Figure 2 As shown, the aforementioned automotive insert injection mold also includes a second elastic element 8. The second elastic element 8 includes a guide pin 81 and a spring 82 sleeved on the guide pin 81. The first top plate 2 is slidably disposed on the guide pin 81, and the spring 82 is located between the rear template 1 and the first top plate 2. The guide pin 81 ensures the direction of movement of the first top plate 2, and the spring 82 facilitates the reset of the first top plate 2.

[0033] In some implementations, please refer to Figure 1 As shown, the aforementioned automotive insert injection mold also includes a mold body 9, which has a loading space. The moving mold is disposed in the loading space, and the rear mold platen 1 is disposed on top of the mold body 9 so that the rear mold platen 1 is positioned above the loading space. The mold body 9 is provided to support the overall injection mold and to position the injection mold on the injection molding machine. The guide block 43 can be fixedly connected to the mold body 9 with screws.

[0034] Example 1 A type of automotive insert injection mold, please refer to Figures 1 to 4 , Figure 6 and Figure 8As shown, the device includes a rear template 1, a moving mold, and an ejector pin 7. The top surface of the rear template 1 has a forming groove. The moving mold includes a first top plate 2 and a second top plate 3 located below the rear template 1 and moving vertically. The first top plate 2 is provided with a first ejector pin 21 that passes through the rear template 1 to eject the product 10 out of the forming groove. The second top plate 3 is provided with a second ejector pin 31. The tip of the second ejector pin 31 passes through the rear template 1 and extends 0.5 mm into the forming groove. A transmission component 4 is provided on the side end of the moving mold. The transmission component 4 includes a guide block 43 and a hook 41. The end of the guide block 43 facing the rear template 1 has a pushing head 431. The hook 41 has a hanging head 411 and a transmission block 412 connected to the second top plate 3. The first top plate 2 is located above the second top plate 3. The side wall of the first top plate 2 has a slide groove 22. A slider 42 is slidably disposed in the slide groove 22. The slider 42 has a lifting head 421 extending out of the slide groove 22. The hanging head 411 abuts against the lifting head 421. When the slider 42 contacts the pushing head 431 and the first ejector pin 21 moves toward the rear template 1, the lifting head 421 will gradually enter the slide groove 22. The second top plate 3 has a clearance hole 35. The ejector rod 7 passes through the clearance hole 35 and contacts the first top plate 2. The ejector rod 7 passing through the clearance hole 35 can drive the first top plate 2 to move toward the rear template 1.

[0035] Working principle: A first ejector plate 2 drives the first ejector pin 21 and a second ejector plate 3 drives the second ejector pin 31. The tip of the second ejector pin 31 extends into the forming groove of the rear template 1, so that the product 10 covers the tip of the second ejector pin 31 after cooling. During demolding, the ejector rod 7 pushes the first ejector plate 2 towards the rear template 1. Since the hook 41 is hung on the lifting head 421 of the slider 42 through the hook head 411, and the hook 41 is connected to the second ejector plate 3 through the transmission block 412, it can synchronously drive the second ejector plate 3 towards the rear template 1, so that the first ejector pin 21 and the second ejector pin 31 synchronously eject the product 10. At this time, the second ejector pin 31 plays a limiting role, effectively preventing the product 10 from shifting towards the core pulling or angled ejection direction. After product 10 is completely separated from the core puller or the angled ejector, the slider 42 contacts the pushing head 431 of the guide block 43. The ejector rod 7 continues to drive the first ejector plate 2 to move towards the rear template 1. The pushing head 431 pushes the slider 42 into the slide groove 22, so that the hook 41 disengages from the slider 42. This achieves the demolding of product 10 from the second ejector pin 31.

[0036] Example 2 This embodiment further defines the assembly structure of the first ejector pin 21 and the first top plate 2 based on Embodiment 1, as follows: Please refer to Figure 8As shown, the first top plate 2 includes a first upper top plate 25 and a first lower top plate 26 connected below the first upper top plate 25. The tail end of the first ejector pin 21 is T-shaped and connected to the first lower top plate 26. The first upper top plate 25 is provided with a first snap-fit ​​groove 251 that is adapted to the tail end of the first ejector pin 21.

[0037] Working principle: The tail end of the first ejector pin 21 is connected to the first lower top plate 26, and the tail end is set into a T-shape. A matching first snap-fit ​​groove 251 is provided on the first upper top plate 25, thereby improving the installation reliability of the first ejector pin 21 on the first top plate 2.

[0038] Example 3 This embodiment further defines the assembly structure of the second ejector pin 31 and the second top plate 3 based on Embodiment 1, as follows: Please refer to Figure 6 As shown, the second top plate 3 includes a second upper top plate 32 and a second lower top plate 33 connected below the second upper top plate 32. The tail end of the second ejector pin 31 is T-shaped and connected to the second lower top plate 33. The second upper top plate 32 is provided with a second snap-fit ​​groove 321 that is adapted to the tail end of the second ejector pin 31.

[0039] Working principle: The tail end of the second ejector pin 31 is connected to the second lower top plate 33, and the tail end is set into a T-shape. A matching second snap-fit ​​groove 321 is provided on the second upper top plate 32, thereby improving the installation reliability of the second ejector pin 31 on the second top plate 3.

[0040] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An injection mold for automotive inserts, comprising a mold body (9), a rear template (1), and a moving mold, wherein the rear template (1) is fixedly disposed on the mold body, and the moving mold is movably disposed within the mold body, and the rear template (1) has a molding groove, characterized in that: The moving mold includes a first top plate (2) and a second top plate (3) located below the rear template (1) and moving vertically. The first top plate (2) is provided with a first ejector pin (21), and the second top plate (3) is provided with a second ejector pin (31). In the initial state, the tip of the first ejector pin (21) does not extend into the molding groove, and the tip of the second ejector pin (31) extends into the molding groove.

2. The automotive insert injection mold according to claim 1, characterized in that: The moving mold has a transmission component (4) on its side. The transmission component includes a hook (41) disposed between the first top plate (2) and the second top plate (3) and a slider (42) disposed between the hook (41) and the first top plate (2). The lower end of the hook (41) is fixedly connected to the second top plate (3), and the slider (42) is slidably connected to the first top plate (2). The slider (42) has a first position connected to the upper end of the hook (41) and a second position disconnected from the upper end of the hook (41). When the hook (41) is in the first position, the first top plate (2) drives the second top plate (3) to rise and fall synchronously. When the hook (41) is in the second position, the first top plate (2) is disconnected from the second top plate (3) and rises and falls independently.

3. The automotive insert injection mold according to claim 2, characterized in that: The transmission component (4) further includes a guide block (43) with its lower end fixedly disposed on the mold body (9). The upper end of the guide block (43) is provided with a push head (431) protruding along one side of the slider (42). A first elastic element (23) for keeping the slider (42) in a first position is connected between the slider (42) and the first top plate (2). When the slider (42) contacts the push head (431), it forces the hook (41) to slide to the second position.

4. The automotive insert injection mold according to claim 3, characterized in that: The upper end of the hook (41) is provided with a hook head (411) connected to the slider (42), and the lower end is provided with a transmission block (412) for fixed connection with the second top plate (3). The hook (41) is slidably sleeved on the guide block (43). The first top plate (2) is located above the second top plate (3). The side wall of the first top plate (2) is provided with a groove (22). The slider (42) is slidably connected in the groove (22). The first elastic element (23) is connected between the groove (22) and the slider (42). The slider (42) is provided with a lifting head (421) at one end near the hook (41). When the hook (41) is in the first position, the lower end face of the hook head (411) abuts against the lifting head (421).

5. The automotive insert injection mold according to claim 4, characterized in that: The push head (431) is provided with a first guide slope (5), and the lifting head (421) is provided with a second guide slope (6) adapted to the first guide slope (5).

6. The automotive insert injection mold according to claim 4, characterized in that: The groove (22) is provided with a first limiting block (24) at the groove opening, which only allows the lifting head (421) to extend out of the groove (22).

7. The automotive insert injection mold according to claim 1, characterized in that: The length of the tip of the second ejector pin (31) extending into the molding groove is 0.4 mm to 0.6 mm.

8. The automotive insert injection mold according to claim 1, characterized in that: The first top plate (2) includes a first upper top plate (25) and a first lower top plate (26) connected below the first upper top plate (25). The tail end of the first ejector pin (21) is T-shaped or L-shaped. The tail end of the first ejector pin (21) is connected to the first lower top plate (26). The first upper top plate (25) is provided with a first snap-fit ​​groove (251) that is adapted to the tail end of the first ejector pin (21).

9. The automotive insert injection mold according to claim 1, characterized in that: The second top plate (3) includes a second upper top plate (32) and a second lower top plate (33) connected below the second upper top plate (32). The tail end of the second ejector pin (31) is T-shaped or L-shaped. The tail end of the second ejector pin (31) is connected to the second lower top plate (33). The second upper top plate (32) is provided with a second snap-fit ​​groove (321) that is adapted to the tail end of the second ejector pin (31).

10. The automotive insert injection mold according to claim 1, characterized in that: It also includes a second elastic element (8), which includes a guide pin (81) and a spring (82) sleeved on the guide pin (81). The first top plate (2) is slidably disposed on the guide pin (81), and the spring (82) is located between the rear template (1) and the first top plate (2).

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