Processing Machinery
3 조회수
PPS Discoloration Streaks
문제 현상
Yellow or brown streaks appear on the parts, and color hue is unstable between batches
원인 분석
PPS discoloration streaks originate from melt overheating: barrel temperature exceeding limits, too-high back pressure, too-fast screw speed, and too-long retention; streak positions mostly correspond to shear concentration areas
해결 방법
①Return barrel temperature to the 300-340°C window; ②Reduce back pressure and rotation speed; ③Investigate retention points and dead corners; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
핵심 요약
PPS discoloration is a map of shear heat; streak positions guide the troubleshooting direction, and lowering temperature and speed is the main line; 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!