Molds & Tooling
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POM crystallization control
Problembeschreibung
POM products from the same mold have different shrinkage rates in different batches
Ursachenanalyse
Mold temperature fluctuations cause different crystallinity, and the shrinkage rate changes accordingly; 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 data and should be confirmed first during troubleshooting
Lösung
Lock the mold temperature and monitor by actual measurement; standardize process parameters; include shrinkage rate in first article inspection; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Wichtigste Erkenntnis
Shrinkage consistency relies on mold temperature and process locking; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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