Integrated demolding and ejection injection mold for arc-shaped hollow injection molding part
By using a hydraulically driven moving mold and slide rail system, combined with the design of push rods and push plates, the problems of unstable operation and unstable mold opening of injection molds are solved, achieving stable ejection of injection molded parts and reducing wear, thus improving the service life of the mold.
Patent Information
- Application Number
- CN202520041469.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-08
AI Technical Summary
Existing injection molds are prone to unstable operation due to lubrication and corrosion when using cylinder-driven ejection mechanisms, resulting in wear of the ejection mechanism and damage to the edges of the injection molded parts, as well as poor mold opening stability.
The moving mold and slide rail system driven by hydraulic cylinders achieves stable ejection and demolding of injection molded parts through the cooperation of push rods and push plates. The combination of limit structure and springs ensures the stability of push plate and push rod and avoids wear.
It improves the mold opening stability of injection molds, avoids damage to injection molded parts during demolding, ensures the stable movement of ejector plates and ejector pins, and extends the service life of molds.
Smart Images
Figure CN223790939U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection mold technology, specifically to an integrated ejection injection mold for arc-shaped hollow injection molded parts. Background Technology
[0002] Injection molded parts are various plastic products produced by injection molding machines and are widely used in packaging, parts and other fields. The main materials of injection molded parts include polyethylene and polypropylene. These materials are heated and plasticized by adding various organic solvents, then injected into the mold to form the product, and finally demolded after cooling.
[0003] Arc-shaped hollow injection molded parts are a type of injection molded parts. Custom injection molds are required when processing arc-shaped hollow injection molded parts, but existing injection molds have certain inconveniences in use.
[0004] In the use of existing injection molds, the injection molded parts are generally ejected and demolded through an ejection mechanism. The existing ejection mechanism is generally driven by a cylinder. However, cylinders are prone to unstable operation due to factors such as lubrication and corrosion. This can easily cause wear between the ejector rod of the ejection mechanism and the cavity, resulting in certain inconveniences during use. In addition, the stability of existing injection molds is generally poor when the mold is opened, which can easily cause damage to the edges of the injection molded parts.
[0005] To address this, we propose an integrated ejection mold for hollow injection molded parts with an arc shape. Utility Model Content
[0006] The main purpose of this utility model is to provide an integrated ejection mold for arc-shaped hollow injection molded parts, which can effectively solve the problems in the background art.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an integrated ejection mold for a hollow arc-shaped injection molded part, comprising a fixed mold, a movable mold at one end of the fixed mold, a slide rail at the lower end of the movable mold, a fixed plate on the upper outer surface of the slide rail, a slider between the movable mold and the slide rail, a push rod and a hydraulic cylinder on the front outer surface of the fixed plate, the hydraulic cylinder being located on both sides of the push rod, a limit hole and a groove on the outer wall of the push rod, the limit hole being located on one side of the groove, an insertion hole on the rear outer surface of the movable mold, a central groove in the middle of the movable mold, a guide rod on the inner surface of one end of the central groove, a push plate on the outer wall of the guide rod, a first limiting spring between the push plate and the central groove, a push rod on the front outer surface of the push plate, and a butt joint on the rear outer surface of the push plate.
[0008] Preferably, the outer surface of the front end of the fixed mold is provided with an injection joint, the outer surface of the rear end of the fixed mold is provided with a docking rod, and the outer surface of the front end of the movable mold is provided with a docking hole and a cavity, the docking hole being located around the cavity.
[0009] Preferably, the connector has a built-in groove in the middle, a limiting head is provided in the middle of the built-in groove, and a second limiting spring is provided between the limiting head and the built-in groove.
[0010] Preferably, the movable mold is movably connected to the slide rail via a slider, and the output end of the hydraulic cylinder is connected to the rear outer surface of the movable mold.
[0011] Preferably, the push rods are integrally formed with the limiting holes and the sliding grooves, the insertion holes and the central grooves are through-holes, and the first limiting springs are fixedly connected to the push plate and the central grooves.
[0012] Preferably, the connector and the built-in groove are integrally formed, and the limiting head is movably connected to the built-in groove through a second limiting spring.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] The movable mold can move along the slide rail under the drive of the hydraulic cylinder. When the hydraulic cylinder moves the movable mold backward to open the mold, the push rod will push the push plate forward. The ejector rod will descend under the push of the push plate to eject the molded part and demold. The push rod can ensure the stable movement of the push plate and the ejector rod during use and avoid wear. Moreover, the movable mold moves along the slide rail through the slider under the drive of the hydraulic cylinder, which has high stability during mold opening and can prevent damage to the molded part during mold opening. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a cross-sectional structural diagram of the movable mold of this utility model;
[0017] Figure 3 This is a cross-sectional structural diagram of the connector of this utility model.
[0018] In the diagram: 1. Fixed mold; 2. Moving mold; 3. Slide rail; 4. Fixed plate; 5. Slider; 6. Injection joint; 7. Connecting rod; 8. Connecting hole; 9. Cavity; 10. Push rod; 11. Hydraulic cylinder; 12. Limiting hole; 13. Slide groove; 14. Through hole; 15. Central groove; 16. Guide rod; 17. Push plate; 18. First limiting spring; 19. Ejector rod; 20. Connecting joint; 21. Internal groove; 22. Limiting head; 23. Second limiting spring. Detailed Implementation
[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0020] like Figure 1-3 As shown in the figure, the present invention provides an integrated ejection mold for a hollow arc-shaped injection molded part, comprising a fixed mold 1, a movable mold 2 at one end of the fixed mold 1, a slide rail 3 at the lower end of the movable mold 2, a fixed plate 4 on the upper outer surface of the slide rail 3, a slider 5 between the movable mold 2 and the slide rail 3, and a push rod 10 and a hydraulic cylinder 11 on the front outer surface of the fixed plate 4, the hydraulic cylinder 11 being located on both sides of the push rod 10, and the outer wall of the push rod 10 being provided with... The moving mold 2 has a limiting hole 12 and a sliding groove 13. The limiting hole 12 is located on one side of the sliding groove 13. The outer surface of the rear end of the moving mold 2 is provided with an insertion hole 14. The middle part of the moving mold 2 is provided with a central groove 15. One end of the inner surface of the central groove 15 is provided with a guide rod 16. The outer wall of the guide rod 16 is provided with a push plate 17. A first limiting spring 18 is provided between the push plate 17 and the central groove 15. The outer surface of the front end of the push plate 17 is provided with a push rod 19. The outer surface of the rear end of the push plate 17 is provided with a connecting joint 20.
[0021] Specifically, in this embodiment, a fixed mold 1 is included, a movable mold 2 is provided at one end of the fixed mold 1, a slide rail 3 is provided at the lower end of the movable mold 2, a fixed plate 4 is provided on the upper outer surface of the slide rail 3, a slider 5 is provided between the movable mold 2 and the slide rail 3, a push rod 10 and a hydraulic cylinder 11 are provided on the front outer surface of the fixed plate 4, the hydraulic cylinder 11 is located on both sides of the push rod 10, a limit hole 12 and a slide groove 13 are provided on the outer wall of the push rod 10, the limit hole 12 is located on one side of the slide groove 13, an insertion hole 14 is provided on the rear outer surface of the movable mold 2, a central groove 15 is provided in the middle of the movable mold 2, a guide rod 16 is provided on the inner surface of one end of the central groove 15, a push plate 17 is provided on the outer wall of the guide rod 16, a first limit spring 18 is provided between the push plate 17 and the central groove 15, and a push rod 19 is provided on the front outer surface of the push plate 17. The outer surface of the rear end of the plate 17 is provided with a connector 20. The movable mold 2 can move along the slide rail 3 under the drive of the hydraulic cylinder 11. When the hydraulic cylinder 11 drives the movable mold 2 to move backward to open the mold, the push rod 10 will be inserted into the central groove 15 through the through hole 14 and dock with the connector 20 at the rear end of the push plate 17. When the movable mold 2 continues to move backward, the push rod 10 will push the push plate 17 forward. Then the push plate 17 will compress the first limit spring 18. The ejector rod 19 will be pushed down by the push plate 17 to eject the molded injection part and demold. The push rod 10 can ensure the stable movement of the push plate 17 and the ejector rod 19 during use and can avoid wear. Moreover, the movable mold 2 moves along the slide rail 3 through the slider 5 under the drive of the hydraulic cylinder 11. It has high stability when opening the mold and can avoid damage to the injection part when opening the mold.
[0022] This utility model provides an integrated ejection mold for a hollow arc-shaped injection molded part. The movable mold 2 can move along the slide rail 3 under the drive of the hydraulic cylinder 11. When the hydraulic cylinder 11 drives the movable mold 2 to move backward to open the mold, the push rod 10 will push the push plate 17 to move forward. The ejector rod 19 is pushed down by the push plate 17 to eject the molded part and demold it. The push rod 10 can ensure the stable movement of the push plate 17 and the ejector rod 19 during use and can avoid wear.
[0023] In one embodiment of this utility model, an injection joint 6 is provided on the front outer surface of the fixed mold 1, a docking rod 7 is provided on the rear outer surface of the fixed mold 1, and a docking hole 8 and a cavity 9 are provided on the front outer surface of the movable mold 2. The docking hole 8 is located around the cavity 9, and the cavity 9 can facilitate the injection molding of an arc-shaped hollow injection molded part.
[0024] In another embodiment of this utility model, the connector 20 is provided with an internal groove 21 in the middle, and a limiting head 22 is provided in the middle of the internal groove 21. A second limiting spring 23 is provided between the limiting head 22 and the internal groove 21. When the connector 20 is docked with the push rod 10, after the push rod 10 is inserted into the interior of the connector 20, the limiting head 22 will move along the sliding groove 13 on the outer wall of the push rod 10. The limiting head 22 will retract under the pressure of the sliding groove 13. When it retracts, it will press the second limiting spring 23. When the limiting head 22 is aligned with the limiting hole 12, the second limiting spring 23 will spring the limiting head 22 into the limiting hole 12, thereby completing the positioning and docking of the push rod 10. When the moving mold 2 moves forward and disengages, the limiting head 22 will retract backward under the influence of the front inclined surface structure and re-enter the sliding groove 13. Then it will be discharged from the sliding groove 13 to complete the disengagement from the push rod 10.
[0025] In another embodiment of this utility model, the movable mold 2 is movably connected to the slide rail 3 via the slider 5, and the output end of the hydraulic cylinder 11 is connected to the outer surface of the rear end of the movable mold 2. The slide rail 3 is mainly used to ensure that the movable mold 2 can move smoothly and to ensure stability during mold opening.
[0026] In one embodiment of this utility model, the push rod 10 is integrally formed with the limiting hole 12 and the sliding groove 13, the through hole 14 and the central groove 15 are through structures, the first limiting spring 18 is fixedly connected with the push plate 17 and the central groove 15, and the push rod 10 is mainly used to position and push the push plate 17 to move forward when in use.
[0027] In another embodiment of this utility model, the connector 20 and the built-in groove 21 are integrally formed, and the limiting head 22 is movably connected to the built-in groove 21 through the second limiting spring 23. When in use, the limiting head 22 is mainly used for docking and locking between the connector 20 and the push rod 10.
[0028] It should be noted that this utility model is an integrated ejection mold for a hollow arc-shaped injection molded part. During use, after injection molding between the fixed mold 1 and the movable mold 2 is completed via the injection joint 6, it needs to be allowed to cool. When the injection molded part needs to be opened, the hydraulic cylinder 11 can be activated to move the movable mold 2 along the slide rail 3. At this time, the movable mold 2 moves backward along the slide rail 3 via the slider 5. After moving backward to a certain extent, the push rod 10 will be inserted into the central groove 15 through the insertion hole 14 and dock with the connector 20 at the rear end of the push plate 17. During docking, the limiting head 22 will move along the slide groove 13 on the outer wall of the push rod 10, and the limiting head 22 will retract due to the pressure of the slide groove 13. During retraction, it will press the second limiting spring 23. When the limiting head 22 is aligned with the limiting hole 12, the second limiting spring 23 will spring the limiting head 22 into the limiting hole 12. In step 2, the push rod 10 can be positioned and docked. When the moving mold 2 continues to move backward, the push rod 10 will push the push plate 17 forward. Then, the push plate 17 compresses the first limit spring 18. The ejector rod 19 is pushed down by the push plate 17 to eject the molded injection part and remove the mold. The push rod 10 can ensure the stable movement of the push plate 17 and the ejector rod 19 during use and avoid wear. After the injection part is removed from the mold, the hydraulic cylinder 11 drives the moving mold 2 to move forward. At this time, the limit head 22 is affected by the front inclined structure and will retract backward when subjected to force and re-enter the slide groove 13. Then, it is discharged in the slide groove 13 to complete the separation from the push rod 10. The moving mold 2 moves forward along the slide rail 3 through the slider 5. The push plate 17 is reset by the elasticity of the first limit spring 18, which can drive the ejector rod 19 to retract. It is quite practical.
[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A circular-arc hollow injection-molded part integrated demolding and ejection injection mold comprising a fixed mold (1), characterized in that: The fixed mold (1) is provided with a moving mold (2) at one end, the lower end of the moving mold (2) is provided with a slide rail (3), the upper end outer surface of the slide rail (3) is provided with a fixed plate (4), the moving mold (2) and the slide rail (3) are provided with a sliding block (5), the front end outer surface of the fixed plate (4) is provided with a push rod (10) and a hydraulic cylinder (11), the hydraulic cylinder (11) is located on both sides of the push rod (10), the outer wall of the push rod (10) is provided with a limiting hole (12) and a sliding groove (13), the limiting hole (12) is located on one side of the sliding groove (13), the rear end outer surface of the moving mold (2) is provided with a penetrating hole (14), the middle part of the moving mold (2) is provided with a middle slot (15), the inner surface of one end of the middle slot (15) is provided with a guide rod (16), the outer wall of the guide rod (16) is provided with a push plate (17), the first limiting spring (18) is arranged between the push plate (17) and the middle slot (15), the front end outer surface of the push plate (17) is provided with a top rod (19), and the rear end outer surface of the push plate (17) is provided with a butt joint (20).
2. A circular arc hollow injection molded part integrated demolding ejection injection mold according to claim 1, characterized in that: The front end outer surface of the fixed mold (1) is provided with an injection joint (6), the rear end outer surface of the fixed mold (1) is provided with a butt joint (7), the front end outer surface of the moving mold (2) is provided with a butt joint (8) and a cavity (9), and the butt joint (8) is located around the cavity (9).
3. A circular arc hollow injection molded part integrated demolding ejection injection mold according to claim 1, characterized in that: The middle part of the butt joint (20) is provided with an inner slot (21), the middle part of the inner slot (21) is provided with a limiting head (22), and the second limiting spring (23) is arranged between the limiting head (22) and the inner slot (21).
4. The arc hollow injection molded part integrated stripping ejection injection mold according to claim 1, characterized in that: The moving mold (2) is movably connected with the slide rail (3) through the sliding block (5), and the output end of the hydraulic cylinder (11) is connected with the rear end outer surface of the moving mold (2).
5. The arc hollow injection molded part integrated stripping ejection injection mold according to claim 1, characterized in that: The push rod (10) is an integral molding structure with the limiting hole (12) and the sliding groove (13), the penetrating hole (14) and the middle slot (15) are through structures, and the first limiting spring (18) is fixedly connected with the push plate (17) and the middle slot (15).
6. A circular arc hollow injection molded part integrated demolding ejection injection mold according to claim 3, characterized in that: The butt joint (20) and the inner slot (21) are an integral molding structure, and the limiting head (22) is movably connected with the inner slot (21) through the second limiting spring (23).