Molds & Tooling
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LDPE Ejection Whitening
Fenómeno del problema
Whitening and deformation at the ejector pin positions of LDPE products
Análisis de la causa
LDPE is soft, and concentrated ejection force causes local deformation and whitening; when troubleshooting on site, 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
Solución
Enlarge and increase ejector pins; sufficient cooling; sufficient demolding draft; 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, so as to locate the effective measure
Conclusión clave
Ejection whitening relies on balanced ejection and sufficient cooling; 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 similar problems in the future
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