Molds & Tooling
7 조회수
PA12 Burnt and Trapped Air
문제 현상
【Problem phenomenon】PA12 products were burnt and blackened at the ends and rib positions, accompanied by odor
원인 분석
Poor venting causes trapped air to be adiabatically compressed and heated, burning the melt, which is more likely when melt temperature is high; burnt locations are also accompanied by material degradation and strength loss; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
해결 방법
Add vent holes and grooves to unblock the trapped air path; lower barrel temperature and injection speed; enlarge the gate to reduce filling shear heat; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
핵심 요약
For burnt parts, first unblock venting, then lower temperature and speed; a too-small gate is also an accomplice; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!