Molds & Tooling
3 조회수
PA66 cooling crystallization control
문제 현상
PA66 product dimensions continue to change after demolding, still shrinking after 48 hours
원인 분석
PA66 crystallinity is high and crystallization rate is affected by cooling; when cooling is uneven, post-crystallization continues, dimensions drift over time; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
해결 방법
Mold temperature 80-120℃ ensures sufficient and uniform crystallization; precision-dimension parts conditioned after demolding to accelerate dimensional stabilization; inspection performed in the conditioned state; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
핵심 요약
Sufficient and uniform crystallization is the premise of dimensional stability, conditioning is the accelerating means; 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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