Processing Machinery
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POM Warpage Control
Fenómeno do problema
POM flat parts warp after ejection from the mold, with assembly flatness out of tolerance
Análise das causas
Uneven cooling of high-crystallinity material produces shrinkage differences, and warpage occurs after residual stress release; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting
Solução
Balance cooling water circuits; raise mold temperature to 90℃; optimize holding pressure; anneal for setting if necessary; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusão principal
Warpage is controlled by cooling balance and sufficient crystallization; after confirming effectiveness, solidify 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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