Molds & Tooling
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PC Sticking to Mold (Demolding Difficulty)
Fenómeno del problema
The product tightly wraps the core, demolding scratches it or even punches through, requiring manual intervention, and the cycle is affected.
Análisis de la causa
PC has a large gripping force on the mold surface; excessive holding pressure, improper mold temperature, insufficient draft angle, and poor cavity polishing all aggravate mold sticking; the deep-cavity vacuum adsorption effect also superimposes.
Solución
①Reduce holding pressure and melt temperature; ②Polish the cavity and grind along the demolding direction; ③Increase the draft angle; ④Improve ejection balance; ⑤Set an air intake structure for deep-cavity parts to prevent vacuum adsorption.
Conclusión clave
PC has large demolding resistance, and mold draft and polishing must meet higher standards: reduce pressure and temperature to reduce gripping, draft and polishing to reduce resistance, deep cavities to prevent vacuum; PC's demolding margin design must be stricter than general-purpose materials.
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