Material Drying
4 조회수
PA66 recycled '2079851475616104451
문제 현상
PA66 products blended with recycled material have obviously more bubble and strength problems than virgin material
원인 분석
Recycled material exposed in storage absorbs moisture deeply and has undergone multiple heat histories, moisture content and degradation degree both higher than new material; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
해결 방법
Recycled material dried separately with time extended to 6 hours; blending ratio not over 25%; sealed storage after crushing and used as soon as possible; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
핵심 요약
Recycled material needs separate intensified drying and limited blending; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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