Molds & Tooling
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PP Mold Sticking
Fenómeno del problema
Parts stick to the cavity or grip the core tightly, getting scratched during demolding.
Análisis de la causa
Excessive holding pressure, high melt and mold temperature, insufficient draft angle, roughened cavity; PP's shrink-and-grip-core characteristic aggravates sticking.
Solución
①Reduce holding pressure and melt temperature; ②increase draft angle; ③polish the cavity along the demolding direction; ④optimize ejection balance.
Conclusión clave
For mold sticking, reduce pressure first, then fix draft and polishing.
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