一种二次顶机构
By designing a secondary ejection mechanism and utilizing the coordinated movement of the first and second ejector pins, the problem of damage to the undercut structure of plastic products during ejection is solved, achieving an efficient and stable product demolding process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUANZHOU WEIKE HEALTH IND CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the inverted structure of plastic products is prone to damage during ejection due to asynchronous drive components, and the need for synchronous calibration affects production efficiency.
The system employs a two-stage ejection mechanism, which includes an upper mold platform, a lower mold platform, inserts, an ejector plate, a first ejector pin, and a second ejector pin. The ejector plate is driven to move longitudinally by a drive component, the first ejector pin ejects the product, and the second ejector pin moves upward by a spring. The limiting structure, in conjunction with this mechanism, ensures that the undercut part separates smoothly.
This avoids damage to the underpinning part caused by ejection time errors, reduces operation steps, and improves production efficiency.
Smart Images
Figure CN224510330U_ABST
Abstract
Claims
1. A secondary ejector mechanism characterized by, It includes an upper mold platform and a lower mold platform. The upper mold platform is provided with an insert, and the upper end of the insert is constructed with a cavity for forming a product. The lower mold platform is provided with an ejector plate that can be driven to move longitudinally by a driving component. It also includes a first ejector pin and a second ejector pin, wherein the lower end of the first ejector pin is mounted on the ejector plate and the upper end passes through the upper mold plate and abuts against the insert; The bottom end of the cavity has a shaped hole, the upper end of the second ejector pin extends into the shaped hole and forms an undercut area between it and the inner sidewall of the shaped hole. The undercut area is used to form the undercut part of the product, and the second ejector pin tends to move upward.
2. A secondary punch mechanism according to claim 1, characterized in that The bottom end of the second ejector pin is provided with a groove, and a spring is provided between the groove and the lower mold platen.
3. A secondary kicker mechanism according to claim 1, characterised in that The second ejector pin has a first limiting part. When the undercut part of the product leaves the hole, the first limiting part abuts against the bottom end of the insert.
4. A secondary kicker mechanism according to claim 1, characterised in that The undercut area includes an undercut groove provided on the second ejector pin, and the upper end of the undercut groove is inclined.
5. A secondary ejector mechanism according to claim 4, characterised in that There are two undercut grooves, which are arranged symmetrically.
6. A secondary ejector mechanism according to claim 1, characterized in that A guide post is longitudinally arranged between the lower mold platform and the upper mold platform, and the ejector plate is slidably connected to the guide post.
7. A secondary kicker mechanism according to claim 1, wherein The bottom of the second ejector pin extends radially to form a second limiting portion, and the top end of the second limiting portion abuts against the bottom of the ejector pin plate.