Molds & Tooling
4 조회수
TPE Burnt
문제 현상
Local black spots or yellow streaks appear on products.
원인 분석
Material temperature too high, residence time too long or poor venting; local plastic overheats and carbonizes.; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blind machine adjustment based solely on experience
해결 방법
①Reduce barrel temperature; ②shorten melt residence time; ③clean vent grooves to improve venting; ④reduce injection speed.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
핵심 요약
Burning is a signal of overheating and trapped air; troubleshoot from the three aspects of temperature, residence time and venting.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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