Molds & Tooling
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Insufficient mold filling flow length
Problem Phenomenon
Thin-wall or complex parts of PES products are incompletely filled
Cause Analysis
Barrel temperature too low <310°C causing high melt viscosity; mold temperature <120°C causes the melt front to cool rapidly
Solution
Increase the melt temperature to 340-370°C to reduce melt viscosity; increase the mold temperature to 140-160°C to extend the melt flow window
Key Takeaway
PES requires higher processing temperature and mold temperature to assist filling
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