Injection Molding
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PETG '2079851475616104452 screw speed too high, gasification
Fenómeno del problema
Excessive screw speed causes melt shear overheating, bubbles and degradation.
Análisis de la causa
Excessive screw speed produces a large amount of shear heat, exceeding the PETG thermal stability limit.
Solución
Reduce the screw speed to a reasonable range of 50-100rpm; use back pressure to discharge gas.
Conclusión clave
PETG screw speed should be as low as possible under the premise of ensuring plasticization.
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