Secondary ejection mechanism for automobile lamp mirror injection mold

Abstract

The utility model provides an automobile car light reflector injection mold secondary ejection mechanism, including reflector lower mould concrete, upper mould concrete, the top of reflector lower mould concrete has the mould cavity of forming automobile back door lamp reflector and reflector lower mould concrete is connected through the guide pillar and upper mould concrete closes the mould, the bottom of reflector lower mould concrete is provided with mould support, the inside of mould support is provided with mould ejection cylinder, the top rod of mould ejection cylinder extends to the mould cavity of reflector lower mould concrete, still includes secondary ejection mechanism. The utility model discloses a gear portion that can rotate is installed in the one side of the top plate two, gear portion engages and connects the rack portion parallel to ejection cylinder, the mounting seat of rack portion top is installed in the bottom of mould support, has good effect of preventing the damage of the finished product caused by the damage of the finished product, can smoothly carry out in the ejection opening mould process, avoids the damage of the finished product caused by the damage of the finished product.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a secondary ejection mechanism for automotive headlight reflector injection molds. Background Technology

[0002] Molds are various shapes and tools used in industrial production to obtain desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. In short, a mold is a tool used to create shaped objects. This tool is composed of various parts, and different molds are composed of different parts. The main process is to change the physical state of the material being molded to achieve the shaping of the object.

[0003] Car taillight reflectors are manufactured using injection molding. However, due to the special shape of the finished product or the requirements of mass production, a single ejection cannot meet the usage requirements. The finished product remains in the mold cavity or cannot be automatically removed, requiring a second ejection action to complete the demolding of the finished product.

[0004] The existing injection mold combined with the secondary ejection mechanism has the disadvantage that it cannot effectively prevent dislodgement. Due to the small lifting force during the secondary ejection process, dislodgement is easily caused. To address this, we designed a secondary ejection mechanism for an injection mold of an automotive headlight reflector. Summary of the Invention

[0005] The purpose of this invention is to provide a secondary ejection mechanism for automotive headlight reflector injection molds to solve the problems mentioned in the background art.

[0006] The purpose of this utility model can be achieved through the following technical solution: a secondary ejection mechanism for an injection mold of an automotive headlight reflector, comprising a lower mold body and an upper mold body. The top of the lower mold body has a cavity for forming an automotive taillight reflector, and the lower mold body is connected to the upper mold body for mold closing via guide pillars. A mold support is provided at the bottom of the lower mold body, and a mold ejection cylinder is provided inside the mold support. The ejector rod of the mold ejection cylinder extends to the cavity of the lower mold body. The mechanism also includes a secondary ejection mechanism. The secondary ejection mechanism includes an ejection cylinder located at the bottom of the mold body under the reflector. The output shaft of the ejection cylinder is equipped with a top plate II. Multiple ejector rods are provided at the top of the top plate II. The top of the multiple ejector rods is connected to a cylinder top plate located inside the mold support. The cylinder top plate is connected to the mold ejection cylinder.

[0007] In the aforementioned secondary ejection mechanism of the automotive headlight reflector injection mold, a rotatable gear is mounted on one side of the top plate two. The gear meshes with a rack parallel to the ejection cylinder, and the mounting seat at the top of the rack is installed at the bottom of the mold support. This design aims to effectively prevent retraction, ensuring smooth ejection and mold opening, and avoiding damage to the finished product caused by retraction.

[0008] In the aforementioned secondary ejection mechanism of the automotive headlight reflector injection mold, a rubber strip fixing end is provided at the top mounting seat of the rack section. One end of the rubber strip fixing end is provided with a rubber strip having a guide hole, and a scraper is provided around the guide hole of the rubber strip. The purpose of this arrangement is to achieve a good cleaning effect on multiple ejector rods and reduce the amount of external dust adhering to them.

[0009] In the aforementioned secondary ejection mechanism of the automotive headlight reflector injection mold, a mold top plate is installed on the upper mold body, and a sprue runner extending into the mold cavity is installed at the center of the bottom end of the mold top plate. This design aims to achieve good casting performance, facilitating the pouring of molten material into the mold cavity.

[0010] In the aforementioned secondary ejection mechanism of the automotive headlight reflector injection mold, a heat exchange jacket is fitted around the outer periphery of the gate runner. A heat flow conduit is provided inside the heat exchange jacket to enclose the gate runner, and both ends of the heat flow conduit are equipped with sealing connectors. This design aims to effectively preheat the gate runner, ensuring it remains at a high temperature. This reduces the amount of heat exchanged between the molten material and the runner, ensuring fluidity and preventing solidification during molding.

[0011] In the aforementioned secondary ejection mechanism for automotive headlight reflector injection molds, a support base is provided at the bottom of the mold support. This support base is securely connected to the ejection cylinder and the mold support via support components. This design aims to provide excellent support and ensure the overall stability of the mold.

[0012] Compared with the prior art, the advantages of the secondary ejection mechanism of the automotive headlight reflector injection mold of this utility model are as follows: by installing a rotatable gear part on one side of the top plate, the gear part meshes with the rack part parallel to the ejection cylinder, and the mounting seat at the top of the rack part is installed at the bottom of the mold support, which has a good anti-displacement effect, so that the ejection and mold opening process can proceed smoothly and avoid damage to the finished product caused by displacement. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the secondary ejection mechanism of the injection mold for automotive headlight reflectors according to this utility model.

[0014] Figure 2This is a schematic diagram of the secondary ejection mechanism of the injection mold for automotive headlight reflectors according to this utility model.

[0015] Figure 3 This is a schematic diagram of the gate flow channel of the secondary ejection mechanism of the injection mold for automotive headlight reflectors of this utility model.

[0016] Figure 4 This is a schematic diagram of the rack and pinion mechanism of the secondary ejection part of the injection mold for automotive headlight reflectors according to this utility model.

[0017] In the diagram, 1. Lower mold body with reflector; 2. Upper mold body; 3. Mold cavity; 4. Mold support; 5. Mold ejection cylinder; 6. Support base; 7. Cylinder top plate; 8. Top plate II; 9. Ejector rod; 10. Ejection cylinder; 11. Mold top plate; 12. Sprue runner; 13. Heat exchange jacket; 14. Hot runner; 15. Sealing connector; 16. Rack section; 17. Gear section; 18. Rubber strip fixing end; 19. Rubber strip; 20. Scraper. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution of the secondary ejection mechanism for the injection mold of the automotive headlight reflector of this utility model is as follows: As the first embodiment of this solution: the mold includes a lower mold body 1 and an upper mold body 2. The top of the lower mold body 1 has a mold cavity 3 for forming a car taillight reflector, and the lower mold body 1 is connected to the upper mold body 2 through a guide post. The bottom of the lower mold body 1 is provided with a mold support 4. The mold support 4 is provided with a mold ejection cylinder 5 inside. The ejector rod of the mold ejection cylinder 5 extends to the mold cavity 3 of the lower mold body 1. It also includes a secondary ejection mechanism. The secondary ejection mechanism includes an ejection cylinder 10 located at the bottom of the mold body 1 under the reflector. The output shaft of the ejection cylinder 10 is equipped with a top plate 8. Multiple ejector rods 9 are provided at the top of the top plate 8. The top of the multiple ejector rods 9 is connected to a cylinder top plate 7 located inside the mold support 4. The cylinder top plate 7 is connected to the mold ejection cylinder 5.

[0020] Among them, the bottom end of the mold support 4 is provided with a support base 6, and the support base 6 is fastened to the ejector cylinder 10 and the mold support 4 through the support component.

[0021] As a second embodiment of this solution: based on the first embodiment, the same structure will not be described again, such as... Figure 4 As shown, a rotatable gear part 17 is installed on one side of the top plate 2 8. The gear part 17 is meshed with a rack part 16 parallel to the ejection cylinder 10. The mounting seat on the top of the rack part 16 is installed at the bottom of the mold support 4. This has a good anti-displacement effect, which allows the ejection and mold opening process to proceed smoothly.

[0022] As a third embodiment of this solution: Based on the second embodiment, a rubber strip fixing end 18 is provided at the top mounting seat of the rack part 16. One end of the rubber strip fixing end 18 is provided with a rubber strip 19 having a guide hole, and a scraper 20 is provided around the guide hole of the rubber strip 19. This has a good cleaning effect on multiple top rods 9 and reduces the amount of dust adhering to the outside of the top rods 9.

[0023] As the fourth embodiment of this solution: the mold includes a lower mold body 1 and an upper mold body 2. The top of the lower mold body 1 has a mold cavity 3 for forming a car taillight reflector, and the lower mold body 1 is connected to the upper mold body 2 through a guide post. The bottom of the lower mold body 1 is provided with a mold support 4. The mold support 4 is provided with a mold ejection cylinder 5 inside. The ejector rod of the mold ejection cylinder 5 extends to the mold cavity 3 of the lower mold body 1. It also includes a secondary ejection mechanism. The secondary ejection mechanism includes an ejection cylinder 10 located at the bottom of the mold body 1 under the reflector. The output shaft of the ejection cylinder 10 is equipped with a top plate 8. Multiple ejector rods 9 are provided at the top of the top plate 8. The top of the multiple ejector rods 9 is connected to a cylinder top plate 7 located inside the mold support 4. The cylinder top plate 7 is connected to the mold ejection cylinder 5. A mold top plate 11 is installed at the upper mold body 2. A sprue runner 12 extending to the mold cavity 3 is installed at the center of the bottom end of the mold top plate 11. A heat exchange jacket 13 is fitted around the outer periphery of the sprue runner 12. A heat flow conduit 14 is provided inside the heat exchange jacket 13 to wrap around the sprue runner 12. Both ends of the heat flow conduit 14 are provided with sealing connectors 15. This has a good preheating effect on the sprue runner 12, which keeps the sprue runner 12 at a high temperature. This reduces the amount of heat exchange between the molten material flowing through it and the sprue runner, ensuring fluidity and preventing solidification during molding.

[0024] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A secondary ejection mechanism for an injection mold of an automotive headlight reflector, comprising a lower mold body (1) and an upper mold body (2), wherein the top of the lower mold body (1) has a mold cavity (3) for forming an automotive taillight reflector, and the lower mold body (1) is connected to the upper mold body (2) by a guide post; a mold support (4) is provided at the bottom of the lower mold body (1), and a mold ejection cylinder (5) is provided inside the mold support (4); the ejector rod of the mold ejection cylinder (5) extends to the mold cavity (3) of the lower mold body (1), characterized in that, It also includes a secondary ejection mechanism; The secondary ejection mechanism includes an ejection cylinder (10) located at the bottom of the mold body (1) under the reflector. The output shaft of the ejection cylinder (10) is equipped with a top plate (8). The top of the top plate (8) is provided with multiple ejector rods (9). The top of the multiple ejector rods (9) is connected to a cylinder top plate (7) located inside the mold support (4). The cylinder top plate (7) is connected to the mold ejection cylinder (5).

2. The secondary ejection mechanism for the automotive headlight reflector injection mold according to claim 1, characterized in that, A rotatable gear part (17) is installed on one side of the top plate (8). The gear part (17) is meshed with a rack part (16) parallel to the ejector cylinder (10). The mounting seat on the top of the rack part (16) is installed at the bottom of the mold support (4).

3. The secondary ejection mechanism for the automotive headlight reflector injection mold according to claim 2, characterized in that, The top mounting seat of the rack part (16) is provided with a rubber strip fixing end (18), and one end of the rubber strip fixing end (18) is provided with a rubber strip (19) with a guide hole, and a scraper (20) is provided around the guide hole of the rubber strip (19).

4. The secondary ejection mechanism for the automotive headlight reflector injection mold according to claim 1, characterized in that, A mold top plate (11) is installed on the upper mold body (2), and a sprue channel (12) extending to the mold cavity (3) is installed at the center of the bottom end of the mold top plate (11).

5. The secondary ejection mechanism for the automotive headlight reflector injection mold according to claim 4, characterized in that, A heat exchange sleeve (13) is installed around the outer periphery of the gate flow channel (12). A heat flow conduit (14) is provided on the inner side of the heat exchange sleeve (13) to wrap the gate flow channel (12). Both ends of the heat flow conduit (14) are provided with sealing connectors (15).

6. The secondary ejection mechanism for the automotive headlight reflector injection mold according to claim 1, characterized in that, The bottom end of the mold support (4) is provided with a support base (6), and the support base (6) is fastened to the ejector cylinder (10) and the mold support (4) through the support component.

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