Injection Molding
6 조회수
PA66 '2079851475616104452 weld line whitening
문제 현상
White lines, obvious on dark-colored parts.
원인 분석
Cold front + gas impurities; different reflection characteristics at convergence; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience; during troubleshooting, confirm item by item around key factors such as weld lines and whitening to avoid misjudgment.
해결 방법
①Raise temperature; ②open or clean vent grooves at the corresponding positions to ensure smooth gas discharge; ③set overflow wells at the convergence to lead the cold front out of the cavity; ④adjust gate position/number to change melt flow direction and convergence position; ⑤increase injection speed to maintain melt front temperature and improve filling.
핵심 요약
PA66 white line='cold front': raise temperature, vent, overflow wells; appearance parts need weld lines hidden; 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!