Injection mold for a plastic housing

Abstract

The utility model relates to injection mold component technical field, especially a kind of injection mold of plastic shell, its characterized in that, lower mould bottom is equipped with the through-hole of stepped type, the through-hole movably abuts with top head, hollow thimble is integrally formed in the lower end of top head, support ring is coaxially slidably connected in hollow thimble inner wall, support ring is coaxially fixedly connected with vibration rod, vibration rod top coaxially fixedly connected with the vibration head of the abutment of hollow thimble upper side inner wall, the guide hole of two about its axis symmetrical arrangement is arranged in the center hole inner wall, two guide keys are fixedly connected on the outer wall of vibration rod, the guide hole and guide key are one-to-one correspondence and sliding fit, support ring and hollow sleeve bottom are fixedly connected with elastic member, the armature is fixedly connected in the bottom of vibration rod, hollow sleeve bottom is fixedly connected with connecting piece, the electromagnet of the armature corresponding and with controller electrically connected is fixedly connected in connecting piece.

Description

Technical Field

[0001] This utility model relates to the field of injection mold component technology, and in particular to an injection mold for a plastic shell. Background Technology

[0002] Injection molds are standard tools used in the injection molding process of plastic shells. By setting different cavities, injection molds can produce plastic shell products of different shapes. Normally, an injection mold includes an upper mold, a lower mold, and an ejector assembly for ejecting the molded plastic shell. The ejector assembly is often used in conjunction with a hydraulic assembly. The hydraulic assembly is fixedly connected to the ejector assembly, and the hydraulic assembly can use the ejector assembly to eject the molded plastic shell from the injection mold, making it easy to remove the plastic shell from the injection mold. However, sometimes existing ejector assemblies stick to the molded plastic shell during use. This can cause the ejector assembly to pull when ejecting the plastic shell, resulting in damage to the plastic. Utility Model Content

[0003] To address the above issues and overcome the shortcomings of existing technologies, this utility model provides an injection mold for a plastic shell. The technical solution includes an upper mold, a lower mold that engages with the upper mold, and a controller located on one side. The lower mold features a stepped through-hole at its bottom, with a top head movably abutting against it. A hollow ejector pin is integrally formed at the lower end of the top head. A support ring is coaxially slidably connected to the inner wall of the hollow ejector pin. A vibration rod is coaxially fixedly connected to the support ring, and a component coaxially fixedly connected to the top of the vibration rod to the hollow ejector pin. The upper inner wall abuts against the vibrating head. The lower end of the hollow pin has a central hole that is slidably connected to the vibrating rod. The inner wall of the central hole has two guide holes symmetrically arranged about its axis. The outer wall of the vibrating rod is fixedly connected to two guide keys. The guide holes and guide keys correspond one-to-one and slide together. The support ring and the bottom of the hollow sleeve are fixedly connected to an elastic element. The bottom of the vibrating rod is fixedly connected to an armature. The bottom of the hollow sleeve is fixedly connected to a connector. The connector is fixedly connected to an electromagnet that corresponds to the armature and is electrically connected to the controller.

[0004] Preferably, the connector includes two mounting seats arranged symmetrically on the left and right and fixedly connected to the hollow sleeve. Each mounting seat is fixedly connected to a vertical rod, and the lower end of the vertical rod is fixedly connected to a connecting seat. The connecting seat is fixedly connected to the electromagnet.

[0005] Preferably, the elastic element is a spring coaxially mounted on the outside of the vibration rod, with the upper end of the spring fixedly connected to the lower end of the support ring and the lower end of the spring coaxially fixedly connected to the bottom of the hollow ejector pin.

[0006] The beneficial effects of this utility model are: In use, the connecting seat of the connector is fixedly connected to the external hydraulic assembly, which facilitates the ejection of the molded plastic shell by the external hydraulic assembly in conjunction with the hollow ejector pin. The hollow ejector pin is equipped with a vibrating rod. Before ejecting the plastic shell, the ejector pin is vibrated by the vibrating rod in conjunction with the elastic element and other related components, thereby vibrating and detaching the adhesion between the ejector pin and the plastic shell, thus releasing the adhesion between the ejector pin and the plastic shell and avoiding the pulling caused by adhesion when ejecting the plastic shell through the hollow ejector pin, which may even lead to damage to the plastic shell. The present application has a simple structure, is easy to use, and has strong practicality. Attached Figure Description

[0007] Figure 1 This is a first-person perspective three-dimensional sectional view of the present invention.

[0008] Figure 2 This is an enlarged view of region A in the first-view perspective stereoscopic sectional view of this utility model.

[0009] Figure 3 This is an enlarged view of region B in the first-view perspective stereoscopic sectional view of this utility model.

[0010] Figure 4 This is a partial three-dimensional sectional view of the present invention from a second perspective.

[0011] Figure 5 This is a partial three-dimensional sectional view of the present invention from a third perspective.

[0012] Figure 6 This is a third-person perspective stereoscopic view of the present invention.

[0013] Figure Labels 1. Upper mold, 2. Lower mold, 3. Through hole, 4. Ejector head, 5. Hollow ejector pin, 6. Support ring, 7. Vibration rod, 8. Vibration head, 9. Center hole, 10. Guide hole, 11. Guide key, 12. Elastic element, 13. Armature, 14. Connector, 15. Electromagnet, 16. Mounting base, 17. Vertical rod, 18. Connecting base. Detailed Implementation

[0014] The following is in conjunction with the appendix Figure 1-6 The specific embodiments of this utility model will be described in further detail.

[0015] In the first embodiment, the technical solution is that, in use, the connecting seat 18 of the connecting member 14 is fixedly connected to the external hydraulic component (the hydraulic component will not be described in detail in this application), so that the molded plastic shell can be ejected by the external hydraulic component in conjunction with the hollow ejector pin 5. The hollow ejector pin 5 is provided with a vibration rod 7. Before ejecting the plastic shell, the ejector head 4 is vibrated by the vibration rod 7 in conjunction with the elastic member 12 and other related components, so as to vibrate and detach the adhesion between the ejector head 4 and the plastic shell, thereby releasing the adhesion between the ejector head 4 and the plastic shell, and avoiding the pulling caused by adhesion when ejecting the plastic shell through the hollow ejector tube, or even the damage to the plastic shell. The present application has a simple structure, is easy to use, and has strong practicality.

[0016] In Example 2, based on Example 1, specifically, in use, the upper mold 1 and the lower mold 2 are engaged to form a plastic cavity, thereby facilitating the molding of the plastic shell. The bottom of the lower mold 2 is provided with a through hole 3 adapted to the ejector head 4, thereby facilitating the upward movement of the hollow ejector pin 5 via the connecting seat 18 through an external hydraulic component, and then ejecting the plastic shell from the lower mold 2 upward through the ejector head 4.

[0017] To prevent damage to the plastic casing caused by adhesion between the plastic casing and the ejector head 4 during ejection, vibration is required before ejection to break the adhesion. Specifically, the controller energizes the electromagnet 15, which generates a strong magnetism and attracts the armature 13. The armature 13, along with the vibrating rod 7 and vibrating head 8, moves downward along the central hole 9. As the vibrating rod 7 moves downward, the support ring 6 moves downward as well. This downward movement of the support ring 6 compresses the elastic element 12, i.e., the spring. When the armature 13 is attracted to the contact of the electromagnet 15, the spring is compressed to its maximum state, and the vibrating rod 7 and the vibrating head 8 will move downward to their maximum state. Then, the controller controls the electromagnet 15 to be de-energized. When the electromagnet 15 is de-energized, it will lose its magnetism and will no longer attract the armature 13. As a result, the spring will automatically extend and push the support ring 6 to move upward. When the support ring 6 moves upward, the vibrating rod 7 and the vibrating head 8 will move upward synchronously, so that the vibrating head 8 will hit the top of the hollow pin 5, i.e., the vibrating head 8. The vibrating head 8 will vibrate to a certain extent, which can break the adhesion between it and the plastic shell.

[0018] In Example 3, based on Example 2, the connector 14 consists of a mounting base 16, a vertical rod 17, and a connecting base 18. The vibrating rod 7 engages with the guide hole 10 at the center hole 9 via the guide key 11, thereby restricting the vibrating rod 7 to move vertically along the center hole 9 without rotation, thus preventing the vibrating rod 7 from rotating and damaging the spring. The through hole 3 at the bottom of the lower mold 2, i.e., the through hole 3 at the bottom of the cavity, is stepped, ensuring the sealing of the through hole 3 and the mating part of the top head 4.

Claims

1. An injection mold for a plastic housing, comprising an upper mold (1) and a lower mold (2) for engaging with the upper mold (1), and a controller located on one side, characterized in that, The lower mold (2) has a stepped through hole (3) at its bottom. A top head (4) is movably abutted in the through hole (3). A hollow ejector pin (5) is integrally formed at the lower end of the top head (4). A support ring (6) is slidably connected to the inner wall of the hollow ejector pin (5). A vibration rod (7) is slidably connected to the support ring (6). A vibration head (8) is slidably connected to the top of the vibration rod (7) and abuts against the upper inner wall of the hollow ejector pin (5). A center hole (9) is slidably connected to the lower end of the hollow ejector pin (5) and is slidably connected to the vibration rod (7). 9) Two guide holes (10) are symmetrically arranged about their axis on the inner wall. Two guide keys (11) are fixedly connected to the outer wall of the vibration rod (7). The guide holes (10) and guide keys (11) correspond one-to-one and slide together. The support ring (6) and the bottom of the hollow sleeve are fixedly connected to an elastic element (12). The bottom of the vibration rod (7) is fixedly connected to an armature (13). The bottom of the hollow sleeve is fixedly connected to a connector (14). The connector (14) is fixedly connected to an electromagnet (15) that corresponds to the armature (13) and is electrically connected to the controller.

2. The injection mold for a plastic shell according to claim 1, characterized in that, The connector (14) includes two mounting seats (16) arranged symmetrically on the left and right and fixedly connected to the hollow sleeve. Each mounting seat (16) is fixedly connected to a vertical rod (17). The lower end of the vertical rod (17) is fixedly connected to a connecting seat (18). The connecting seat (18) is fixedly connected to the electromagnet (15).

3. The injection mold for a plastic shell according to claim 1, characterized in that, The elastic element (12) is a spring coaxially mounted on the outside of the vibration rod (7). The upper end of the spring is fixedly connected to the lower end of the support ring (6), and the lower end of the spring is coaxially fixedly connected to the bottom of the hollow pin (5).

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