Secondary ejection device
By designing a combination of a single ejection plate and an ejection spring in the injection mold, and combining the positioning structure of the push plate and the moving mold insert, the existing secondary ejection device has been solved, and a stable and accurate secondary ejection function has been achieved.
Patent Information
- Application Number
- CN202323640988.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2033-12-29
AI Technical Summary
The existing secondary ejection device has complex structure, low accuracy and unstable structure, which can easily cause high temperature jamming and cannot effectively solve the ejection problem of special structural products.
A secondary ejection device for injection molds is designed, using a combination of a single ejection plate and an ejection spring. Through the positioning structure of the push plate and the moving mold insert, the secondary ejection function is achieved, which is simple to assemble and low cost.
The stability and accuracy of the secondary ejection function are achieved, which avoids high temperature jamming, reduces assembly complexity and cost, and improves the accuracy of the overall ejection system.
Smart Images
Figure CN223013799U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a secondary ejection device, belonging to the technical field of ejection of injection molds. Background Art
[0002] When using an injection mold to produce plastic products, after the heat-melted plastic is injected into the mold cavity under high pressure by an injection molding machine and cooled and formed, an ejection device is often required to eject the product so that it can be separated from the mold. For the current ejection device, its ejection action is mostly completed in one time. However, when processing some products with special structures, the conventional single-ejection device cannot smoothly eject the product from the mold, or the appearance of the ejected product cannot meet the customer's requirements. Therefore, the design of a secondary ejection device has emerged. However, the existing secondary ejection devices usually add a set of ejector pins and achieve secondary ejection through a stripper or other sequential mold-opening mechanisms. This structure is complex in assembly, low in precision and unstable, and is prone to high-temperature jamming. Summary of the Utility Model
[0003] In order to solve the above technical problems, the utility model provides a secondary ejection device for an injection mold, which is simple in assembly, stable in ejection action and high in precision.
[0004] The technical solution of the utility model is as follows: A secondary ejection device for an injection mold includes a moving mold assembly and an ejection device;
[0005] The moving mold assembly includes a moving mold plate, a moving mold insert block and a moving mold insert. The moving mold insert is placed inside the moving mold insert block, and the moving mold insert block is placed inside the moving mold plate;
[0006] The ejection device includes a push plate, an ejection spring, an ejector pin, an ejector pin plate and an ejector pin bottom plate. The push plate is fixedly connected to the moving mold insert and is arranged below the moving mold insert block. There is a gap between the lower surface of the push plate and the upper surface of the moving mold insert block; the ejection spring is vertically arranged between the push plate and the ejector pin plate; one end of the ejector pin is vertically fixed above the ejector pin plate, and the other end points to the moving mold insert; the ejector pin bottom plate is located below the ejector pin plate.
[0007] Further, screw holes are arranged on the surface of the push plate, and the moving mold insert and the push plate are locked and connected by bolts.
[0008] Further, positioning holes are arranged on the surface of the push plate, and the moving mold insert, the push plate and the moving mold insert block connected together are positioned by positioning pins.
[0009] Further, the ejector pin plate is provided with a stepped hole, and the lower side end of the ejector pin is fixed on the lower surface of the ejector pin plate and cannot move upward.
[0010] Further, it also includes a guide rod. The guide rod is fixedly connected to the ejector pin bottom plate through bolts and passes through the ejector spring, and is matched with the guide holes provided on the ejector plate and the moving die insert.
[0011] Further, the diameters of both ends of the guide rod are different. One end is a short and thick large head, and the other end is a long and thin small head. The large head end of the guide rod is matched with the guide holes provided on the moving die insert and the ejector plate, and the small head end is connected to the ejector pin bottom plate through bolts.
[0012] Further, it also includes a return rod and a return spring. The return rod passes through the return spring and is matched with the return holes provided on the moving die block and the ejector pin plate. The return spring stands vertically between the ejector pin plate and the moving die block.
[0013] The beneficial effects of the present utility model are as follows: By using the combination of a single ejector pin plate and an ejector spring, the secondary ejection function can be achieved without adding additional sequential mold opening components, with simple assembly and low cost; Since both the ejector plate and the insert are positioned, the accuracy of the entire ejection system is higher than that of a conventional secondary ejection device; By using the combination of a return spring, a guide rod and an ejection device, the ejection and return actions are more stable and precise. Description of the Drawings
[0014] Figure 1 is the front view of the present utility model;
[0015] Figure 2 is the present utility model Figure 1 Cross-sectional view taken along line A-A;
[0016] Figure 3 is the present utility model Figure 1 Cross-sectional view taken along line B-B;
[0017] Figure 4 is the present utility model Figure 2 Partial enlarged view at A;
[0018] The reference numerals in the drawings are shown as:
[0019] 1. Moving die assembly; 11. Moving die plate; 12. Moving die insert; 13. Moving die insert.
[0020] 2. Ejection device; 21. Ejector plate; 22. Ejector spring; 23. Ejector pin; 24. Ejector pin plate; 25. Ejector pin bottom plate.
[0021] 3. Return rod; 4. Return spring; 5. Guide rod; 6. Positioning pin; 7. Ejector plate bolt; 8. Insert bolt. Detailed Description of the Preferred Embodiment
[0022] The present utility model will be described in detail below with reference to the drawings and specific embodiments.
[0023] See Figure 1, Figure 2 , Figure 3 , A secondary ejection device, comprising a moving die assembly 1 and an ejection device 2;
[0024] The moving die assembly 1 includes a moving die plate 11, a moving die insert 12, and a moving die insert 13. The moving die insert 13 is placed inside the moving die insert 12, and the moving die insert 12 is placed inside the moving die plate 11;
[0025] The ejection device 2 includes a push plate 21, an ejection spring 22, a ejector pin 23, an ejector pin plate 24, and an ejector pin bottom plate 25. The push plate 21 is fixedly connected to the moving die insert 13 and is arranged below the moving die insert 12. There is a gap between the lower surface of the push plate 21 and the upper surface of the moving die insert 12; The ejection spring 22 is vertically arranged between the push plate 21 and the ejector pin plate 24; One end of the ejector pin 23 is vertically fixed above the ejector pin plate 24, and the other end points to the moving die insert 13; The ejector pin bottom plate 25 is located below the ejector pin plate 24.
[0026] When the ejector pin 23 is ejected outward under the action of the motor, the ejection spring 22 is stretched by force to drive the movement of the push plate 21, so that the moving die insert 13 and the ejector pin 23 are ejected outward simultaneously, realizing the first ejection;
[0027] When the upper surface of the push plate 21 contacts the lower surface of the moving die insert 12, the push plate 21 is limited by the bottom surface of the moving die insert 12, and the push plate 21 and the moving die insert 13 no longer move outward. The ejector pin 23 continues to move outward under the action of the motor, realizing the second ejection.
[0028] Furthermore, screw holes are provided on the surface of the push plate 21, and the moving die insert 13 and the push plate 21 are locked and connected by an insert bolt 8.
[0029] Furthermore, positioning holes are provided on the surface of the push plate 21, and the moving die insert 13, the push plate 21, and the moving die insert 12 connected together are positioned by a positioning pin 11.
[0030] Furthermore, the ejector pin plate 24 is provided with a stepped hole, and the lower side end of the ejector pin 23 is fixed on the lower surface of the ejector pin plate 24 and cannot move upward.
[0031] Furthermore, it further includes a guide rod 5. The guide rod 5 is fixedly connected to the ejector pin bottom plate 25 through a push plate bolt 7 and passes through the ejection spring 22, and is matched with the guide holes provided on the push plate 21 and the moving die insert 12.
[0032] Furthermore, the two ends of the guide rod 5 have different diameters. One end is a short and thick large head, and the other end is a slender small head. The large head end of the guide rod 5 is matched with the guide holes provided on the moving die insert 12 and the push plate 21, and the small head end is connected to the ejector pin bottom plate 25 through a push plate bolt 7.
[0033] Further, it further includes a reset rod 3 and a reset spring 4. The reset rod 3 passes through the reset spring 4 and is engaged with the reset holes provided on the moving template 11 and the ejector plate 24. The reset spring 4 stands vertically between the ejector plate 24 and the moving template 11.
[0034] When the ejection action of the motor disappears, the ejector plate 24 and the ejector bottom plate 25 retreat under the combined action of the ejection spring 22 and the reset spring 4, and the guide rod 5 pulls back the push plate 21 and the moving die insert 13, thereby realizing the reset.
[0035] The beneficial effects of the present utility model are as follows: The combination of a single ejector plate and an ejection spring can achieve the secondary ejection function without adding an additional sequential mold opening component, with simple assembly and low cost; Since the push plate 21 is positioned with the moving die insert 13 and the moving die block 12, the accuracy of the entire ejection system is higher than that of a conventional ejection device; The combination of the reset spring 4, the guide rod 5 and the ejection device makes the ejection and reset actions more stable and accurate.
[0036] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present utility model.
Claims
1. A secondary ejection device, characterized in that: It includes a moving die assembly (1) and an ejection device (2); The moving die assembly (1) includes a moving die plate (11), a moving die insert block (12), and a moving die insert (13). The moving die insert (13) is placed inside the moving die insert block (12), and the moving die insert block (12) is placed inside the moving die plate (11); The ejection device (2) includes a push plate (21), an ejection spring (22), a ejector pin (23), an ejector pin plate (24), and an ejector pin bottom plate (25). The push plate (21) is fixedly connected to the moving die insert (13) and is arranged below the moving die insert block (12). There is a gap between the lower surface of the push plate (21) and the upper surface of the moving die insert block (12). The ejection spring (22) is vertically arranged between the push plate (21) and the ejector pin plate (24). One end of the ejector pin (23) is vertically fixed above the ejector pin plate (24), and the other end points to the moving die insert (13). The ejector pin bottom plate (25) is located below the ejector pin plate (24); The surface of the push plate (21) is provided with screw holes, and the moving die insert (13) and the push plate (21) are locked and connected by an insert bolt (8); It further includes a guide rod (5). The guide rod (5) is fixedly connected to the ejector pin bottom plate (25) by a push plate bolt (7), passes through the ejection spring (22), and cooperates with the guide holes provided on the push plate (21) and the moving die insert block (12).
2. The secondary ejection device according to claim 1, wherein: The surface of the push plate (21) is provided with positioning holes, and the moving die insert (13), the push plate (21), and the moving die insert block (12) connected together are positioned by a positioning pin (6).
3. The secondary ejection device according to claim 1, characterized in that: The ejector pin plate (24) is provided with a stepped hole, and the lower side end of the ejector pin (23) is fixed on the lower surface of the ejector pin plate (24).
4. The secondary ejection device according to claim 1, characterized in that: The two ends of the guide rod (5) have different diameters. One end is a short and thick large head, and the other end is a slender small head. The large head end of the guide rod (5) cooperates with the guide holes provided on the moving die insert block (12) and the push plate (21), and the small head end is connected to the ejector pin bottom plate (25) by a push plate bolt (7).
5. The secondary ejection device according to claim 1, characterized in that: It further includes a reset rod (3) and a reset spring (4). The reset rod (3) passes through the reset spring (4) and cooperates with the reset holes provided on the moving die plate (11) and the ejector pin plate (24). The reset spring (4) stands vertically between the ejector pin plate (24) and the moving die plate (11).