Molds & Tooling
4 조회수
PPS Check Valve and Retention
문제 현상
Metering fluctuates, part weight is unstable, and cold material spots occasionally appear at the nozzle
원인 분석
PPS melt viscosity is relatively low; check valve failure causes melt backflow and inaccurate metering; cold material from the nozzle section enters the cavity forming cold material spots; regular inspection of the check valve is the safeguard
해결 방법
①Regularly inspect the sealing function of the check valve; ②Control nozzle temperature independently to prevent cold material; ③Include metering fluctuation in equipment inspection items; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
핵심 요약
The low viscosity of PPS amplifies the impact of check valve failure; behind metering stability lies valve health; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!