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• Stringing - plastic injection troubleshooter
• Description:
Stringing is the appearance of a thin plastic string coming from the sprue.
• Causes:
machine
· back pressure too high
· nozzle temperature too high
mould
· wrong sprue
material
· insufficient melt strength
• Actions:
1st
use suck back: only for crystalline materials
2nd
lower back pressure
3rd
lower or increase nozzle temperature
4th
use different temperature profile
5th
do not use sprue breaks
contact:
jmfalcao@moldplast.com
