Molds & Tooling
3 조회수
Difficult Demolding and Mold Sticking of PEEK
문제 현상
PEEK products adhere to the cavity or core during ejection, with large demolding force; the product surface is scratched, whitened by ejection, or even cracked by ejection, especially obvious for deep-cavity thin-wall parts.
원인 분석
PEEK has high melt temperature and high mold temperature, so the product has long thermal contact time with the mold; insufficient draft angle, poor cavity polishing, and over-packing all increase demolding resistance; crystallization shrinkage clamps the core tightly.
해결 방법
①Ensure sufficient draft angle and raise the cavity polishing grade; ②Reduce holding pressure and holding time to alleviate over-packing; ③Adjust the front and rear mold temperatures so the product stays on the ejection side; ④Increase the ejection area to distribute the force.
핵심 요약
PEEK demolding is a friction and clamping force problem under high-temperature working conditions; investment in draft angle and polishing at the mold design stage has the highest return; over-packing is the most common inducement on the process side.
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!