Molding Process
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Excessive back pressure causing melt overheating in PCTG
Fenómeno del problema
Under high back pressure, melt temperature rises beyond the thermal stability limit.
Análisis de la causa
Back pressure set too high generates large amounts of shear heat, accumulated temperature rise exceeds the limit.
Solución
Reduce back pressure to a reasonable range of 0.5-1.5MPa; monitor actual melt temperature.
Conclusión clave
PCTG back pressure is closely related to melt temperature.
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