Material Drying
7 visualizações
Shot weight fluctuation makes product dimensions and weight uneven
Fenómeno do problema
Shot weight fluctuation makes product dimensions and weight uneven
Análise das causas
Screw stroke set improperly, metering deviation
Screw check ring worn, material leakage, inaccurate metering
Screw pullback distance unstable
Melt density change in the barrel (PA moisture absorption affects density)
V-P switchover position inaccurate
Solução
Precisely set the screw stroke to ensure stable metering
Replace the worn check ring
Stabilize the screw pullback distance
Cellulose acetate butyrate density 1.15-1.22g/cm³, stable melt needed
Optimize the V-P switchover position
Conclusão principal
Metering requires an intact check ring and stable stroke
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