Ejector pin structure of injection mold

Abstract

The ejector pin structure of the injection mold comprises a containing box, electric telescopic rods are fixedly connected to the two ends of the bottom of the inner wall of the containing box, the top ends of the electric telescopic rods movably extend to the outer portion of the containing box, and ejector pin bodies are detachably arranged at the top ends of the electric telescopic rods. An ejector pin countersunk head embedded in the bottom of the inner wall of the lower mold is detachably arranged at the top end of the ejector pin body, and a fluid channel is vertically formed in the ejector pin body. According to the ejector pin structure of the injection mold, after the oil pump mechanism works, lubricating oil is injected into the inner cavities of the two fluid channels correspondingly, the lubricating oil flows along the surface of the ejector pin body after flow division is conducted through the multiple oil discharging openings, and the lubricating oil can be smeared between the ejector pin body and an ejector pin hole in the mold after the electric telescopic rod is matched with telescopic movement; and the surface of the ejector pin body can be automatically coated with lubricating oil without disassembling and assembling the ejector pin body by a worker.

Description

Technical Field

[0001] This utility model relates to the field of mold ejector technology, and in particular to an ejector structure for an injection mold. Background Technology

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of injection molding include high production speed and efficiency, automated operation, a wide variety of colors and shapes (from simple to complex), and sizes ranging from large to small. It also produces dimensionally accurate products, facilitates product updates, and can create complex shapes. Injection molding is suitable for mass production and molding processes involving complex shapes. The process involves injecting fully molten plastic material, stirred by a screw at a specific temperature, into a mold cavity under high pressure, and then cooling and solidifying to obtain the molded product.

[0003] Ejector pins are used to eject molded products from a mold. Traditional ejector pins are cylindrical ejector rods with equal outer diameters and countersunk heads. This type of ejector pin is installed in the mounting hole in the mold. When a molded product needs to be ejected, the ejector rod of the ejector pin extends from the mounting hole and ejects the product. However, the ejector pin structure of existing injection molds requires operators to periodically disassemble the ejector pins and apply lubricating oil to their surfaces after prolonged use, which is inconvenient.

[0004] Therefore, it is necessary to provide a new ejector pin structure for injection molds to solve the above-mentioned technical problems. Summary of the Invention

[0005] This utility model provides an ejector pin structure for injection molds, which solves the technical problem that the existing ejector pin structure of injection molds requires operators to periodically disassemble the ejector pins and apply lubricating oil to their surfaces after prolonged use, which is inconvenient.

[0006] To solve the above technical problems, the present invention provides an ejector pin structure for an injection mold, including a receiving box. Both ends of the bottom of the inner wall of the receiving box are fixedly connected to an electric telescopic rod. The top end of the electric telescopic rod extends movably to the outside of the receiving box and is detachably provided with an ejector pin body. The top end of the ejector pin body is detachably provided with an ejector pin countersunk head embedded in the bottom of the inner wall of the lower mold.

[0007] The ejector pin body has a vertically formed fluid channel inside, and the top of the side wall of the ejector pin body has several oil drain ports that communicate with the fluid channel.

[0008] An oil storage tank is fixedly connected to the bottom of the inner wall of the container, and an oil pump mechanism is provided on the top of the container to draw lubricating oil from the inner cavity of the oil storage tank and inject it into the bottom of the inner cavities of the two fluid channels respectively.

[0009] Preferably, the bottom end of the ejector pin body is fixedly connected to an upper connecting plate, and the top end of the electric telescopic rod is fixedly connected to a lower connecting plate. The upper connecting plate and the lower connecting plate are detachably connected by a number of bolt groups.

[0010] Preferably, the oil pump mechanism includes an oil pump body, an oil inlet pipe, a distribution box, and two delivery hoses. The oil pump body is detachably mounted on the top of the receiving tank. The oil inlet pipe is connected to the oil inlet of the oil pump body, and its other end extends to the bottom of the inner cavity of the oil storage tank. The distribution box is located at the oil outlet of the oil pump body. Both delivery hoses are connected to the top of the distribution box, and the other ends of the two delivery hoses are respectively connected to the bottom of the inner cavity of one and the other fluid channel.

[0011] Preferably, a mounting plate is fixedly connected to the bottom of the oil pump body, and the mounting plate is detachably connected to the top of the housing by a number of mounting bolts.

[0012] Preferably, the front side of the container is provided with an inspection cover plate by means of several screws, and several mounting blocks are fixedly connected to the bottom of the side wall of the container.

[0013] Preferably, the bottom of the countersunk head of the ejector pin is fixedly connected to a connecting bolt, and the top of the fluid channel is provided with a threaded hole that is compatible with the connecting bolt.

[0014] Preferably, the top of the oil storage tank is vertically connected to an oil injection pipe, the top end of which extends to the outside of the storage tank and is equipped with a piston.

[0015] Compared with related technologies, the ejector pin structure of the injection mold provided by this utility model has the following beneficial effects:

[0016] This invention provides an ejector pin structure for an injection mold. After the electric telescopic rod extends, it raises the ejector pin body, which in turn pushes the molded part out of the mold. After prolonged use, a pump mechanism injects lubricating oil into the inner cavities of two fluid channels. The oil is then distributed through multiple outlets, allowing the lubricating oil to flow along the surface of the ejector pin body. Combined with the telescopic movement of the electric telescopic rod, lubricating oil is applied between the ejector pin body and the ejector pin holes in the mold, reducing friction during operation. The system automatically applies lubricating oil to the surface of the ejector pin body without requiring manual disassembly, making operation simple and fast, reducing labor intensity, and improving the production efficiency of the injection mold. Attached Figure Description

[0017] Figure 1 A schematic diagram of a preferred embodiment of the ejector pin structure of the injection mold provided by this utility model;

[0018] Figure 2 for Figure 1 The diagram shows the structure of the electric telescopic rod and the countersunk head.

[0019] Figure 3 for Figure 1 The diagram shows a frontal cross-sectional view of the structure.

[0020] Labels in the diagram: 1. Reception box; 2. Electric telescopic rod; 3. Lower connecting plate; 4. Upper connecting plate; 5. Ejector pin body; 6. Bolt assembly; 7. Fluid passage; 8. Oil drain port; 9. Ejector pin countersunk head; 10. Connecting bolt; 11. Threaded hole; 12. Mounting plate; 13. Mounting bolt; 14. Oil pump body; 15. Oil inlet pipe; 16. Oil reservoir; 17. Oil injection pipe; 18. Piston; 19. Diverter box; 20. Delivery hose; 21. Mounting block; 22. Screw; 23. Inspection cover plate. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please refer to the following: Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 A schematic diagram of a preferred embodiment of the ejector pin structure of the injection mold provided by this utility model; Figure 2 for Figure 1 The diagram shows the structure of the electric telescopic rod and the countersunk head. Figure 3 for Figure 1 The diagram shows a front sectional view of the structure. The ejector structure of the injection mold includes a receiving box 1. Both ends of the bottom of the inner wall of the receiving box 1 are fixedly connected to an electric telescopic rod 2. The top of the electric telescopic rod 2 extends movably to the outside of the receiving box 1 and is detachably provided with an ejector body 5. The top of the ejector body 5 is detachably provided with an ejector countersunk head 9 embedded in the bottom of the inner wall of the lower mold.

[0023] The ejector body 5 has a vertically oriented fluid channel 7 inside, and several oil drain ports 8 connected to the fluid channel 7 are opened on the top of the side wall of the ejector body 5.

[0024] An oil storage tank 16 is fixedly connected to the bottom of the inner wall of the container 1. An oil pump mechanism is provided on the top of the container 1 to draw out the lubricating oil from the inner cavity of the oil storage tank 16 and inject it into the bottom of the inner cavity of the two fluid channels 7 respectively.

[0025] After the electric telescopic rod 2 extends, it can drive the ejector body 5 to rise, thereby driving the ejector head 9 to push the molded injection part out of the mold for ejection. After long-term use, the oil pump mechanism can inject lubricating oil into the inner cavity of the two fluid channels 7 respectively, and after the multiple oil outlets 8 are diverted, the lubricating oil flows along the surface of the ejector body 5.

[0026] After the electric telescopic rod 2 extends and moves, lubricating oil can be applied between the ejector body 5 and the ejector hole on the mold to reduce friction during operation. The surface of the ejector body 5 can be automatically applied with lubricating oil without the need for the operator to disassemble and assemble the ejector body 5. The operation is simple and fast, reducing the workload of the operator and improving the production efficiency of the injection mold.

[0027] The bottom end of the ejector pin body 5 is fixedly connected to the upper connecting plate 4, and the top end of the electric telescopic rod 2 is fixedly connected to the lower connecting plate 3. The upper connecting plate 4 and the lower connecting plate 3 are connected by several bolt groups 6.

[0028] After removing multiple bolt groups 6, the lower connecting plate 3 can be separated from the upper connecting plate 4, making it easier to replace the ejector body 5.

[0029] The oil pump mechanism includes an oil pump body 14, an oil inlet pipe 15, a distribution box 19, and two delivery hoses 20. The oil pump body 14 is detached and installed on the top of the housing 1. The oil inlet pipe 15 is connected to the oil inlet of the oil pump body 14, and the other end extends to the bottom of the inner cavity of the oil storage tank 16. The distribution box 19 is installed at the oil outlet of the oil pump body 14. The two delivery hoses 20 are both connected to the top of the distribution box 19, and the other ends of the two delivery hoses 20 are respectively connected to the bottom of the inner cavity of one and the other fluid channel 7.

[0030] After the oil pump body 14 starts working, it can draw the lubricating oil stored in the inner cavity of the oil storage tank 16 and inject the oil into the inside of the diversion box 19. Through the diversion of the two delivery hoses 20, the lubricating oil can be injected into the inner cavities of the two fluid channels 7 respectively.

[0031] The bottom of the oil pump body 14 is fixedly connected to a mounting plate 12, which is detachably connected to the top of the housing 1 by a number of mounting bolts 13.

[0032] The front side of the container 1 is fitted with an inspection cover 23 by means of several screws 22, and several mounting blocks 21 are fixedly connected to the bottom of the side wall of the container 1.

[0033] The bottom of the countersunk head 9 is fixedly connected to a connecting bolt 10, and the top of the fluid channel 7 is provided with a threaded hole 11 that is compatible with the connecting bolt 10.

[0034] After the ejector body 5 passes through the ejector hole and enters the lower mold, it can be threaded into the threaded hole 11 by connecting bolt 10, and then the ejector countersunk head 9 can be fixed to the top of the ejector body 5 for ejection.

[0035] The top of the oil storage tank 16 is vertically connected to an oil injection pipe 17. The top end of the oil injection pipe 17 extends to the outside of the receiving tank 1, and a piston 18 is detachably installed thereon. After the piston 18 is removed, oil can be injected into the inner cavity of the oil storage tank 16 through the oil injection pipe 17.

[0036] The working principle of the ejector pin structure of the injection mold provided by this utility model is as follows:

[0037] After the electric telescopic rod 2 extends, it can drive the ejector body 5 to rise, which in turn drives the ejector head 9 to push the molded injection part out of the mold for ejection. After long-term use, the oil pump mechanism can inject lubricating oil into the inner cavity of the two fluid channels 7 respectively, and after the multiple oil outlets 8 are diverted, the lubricating oil flows along the surface of the ejector body 5. With the extension and retraction of the electric telescopic rod 2, lubricating oil can be applied between the ejector body 5 and the ejector hole on the mold.

[0038] Compared with related technologies, the ejector pin structure of the injection mold provided by this utility model has the following beneficial effects:

[0039] This utility model provides an ejector pin structure for an injection mold. After the electric telescopic rod 2 extends, it can drive the ejector pin body 5 to rise, thereby driving the ejector pin countersunk head 9 to push the molded injection part out of the mold for ejection. After long-term use, the oil pump mechanism can inject lubricating oil into the inner cavity of the two fluid channels 7 respectively, and after the multiple oil outlets 8 are diverted, the lubricating oil flows along the surface of the ejector pin body 5. With the extension and retraction of the electric telescopic rod 2, lubricating oil can be applied between the ejector pin body 5 and the ejector pin hole on the mold, reducing the friction during operation. The surface of the ejector pin body 5 can be automatically applied with lubricating oil without the need for the operator to disassemble and assemble the ejector pin body 5. The operation is simple and fast, reducing the workload of the operator and improving the production and processing efficiency of the injection mold.

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

Claims

1. An ejector pin structure for an injection mold, comprising a receiving box (1), characterized in that, Electric telescopic rods (2) are fixedly connected to both ends of the bottom of the inner wall of the container (1). The top end of the electric telescopic rod (2) extends to the outside of the container (1) and is detachably provided with a ejector body (5). The top end of the ejector body (5) is detachably provided with an ejector countersunk head (9) embedded in the bottom of the inner wall of the lower mold. The ejector body (5) has a vertically formed fluid channel (7) inside, and a number of oil drain ports (8) communicating with the fluid channel (7) are formed on the top of the side wall of the ejector body (5). An oil storage tank (16) is fixedly connected to the bottom of the inner wall of the container (1). An oil pump mechanism is provided on the top of the container (1) to draw out the lubricating oil in the inner cavity of the oil storage tank (16) and inject it into the bottom of the inner cavity of the two fluid channels (7).

2. The ejector pin structure of the injection mold according to claim 1, characterized in that, The bottom end of the ejector pin body (5) is fixedly connected to an upper connecting plate (4), and the top end of the electric telescopic rod (2) is fixedly connected to a lower connecting plate (3). The upper connecting plate (4) and the lower connecting plate (3) are connected by several bolt groups (6).

3. The ejector pin structure of the injection mold according to claim 1, characterized in that, The oil pump mechanism includes an oil pump body (14), an oil inlet pipe (15), a distribution box (19), and two delivery hoses (20). The oil pump body (14) is detachably mounted on the top of the receiving box (1). The oil inlet pipe (15) is connected to the oil inlet of the oil pump body (14), and the other end extends to the bottom of the inner cavity of the oil storage tank (16). The distribution box (19) is located at the oil outlet of the oil pump body (14). The two delivery hoses (20) are both connected to the top of the distribution box (19), and the other ends of the two delivery hoses (20) are respectively connected to the bottom of the inner cavity of one and the other fluid channel (7).

4. The ejector pin structure of the injection mold according to claim 3, characterized in that, The bottom of the oil pump body (14) is fixedly connected to a mounting plate (12), and the mounting plate (12) is detachably connected to the top of the container (1) by a number of mounting bolts (13).

5. The ejector pin structure of the injection mold according to claim 1, characterized in that, The front side of the container (1) is fitted with an inspection cover (23) by means of several screws (22), and several mounting blocks (21) are fixedly connected to the bottom of the side wall of the container (1).

6. The ejector pin structure of the injection mold according to claim 1, characterized in that, The bottom of the countersunk head (9) is fixedly connected to a connecting bolt (10), and the top of the fluid channel (7) is provided with a threaded hole (11) that is compatible with the connecting bolt (10).

7. The ejector pin structure of the injection mold according to claim 1, characterized in that, The top of the oil storage tank (16) is vertically connected to an oil injection pipe (17), the top end of which extends to the outside of the container (1) and is detachably equipped with a piston (18).

Images