Injection Molding
10 Aufrufe
Cushion Control in PBT '2079851475616104452
Problembeschreibung
The cushion (melt reserve) at the front end of the barrel is insufficient or unstable.
Ursachenanalyse
The metering stroke is set improperly; the non-return ring is worn and leaks; the back pressure is insufficient and the melt density is low.
Lösung
Ensure the cushion amount is 3-6mm; check and replace the non-return ring; appropriately increase the back pressure.
Wichtigste Erkenntnis
The PBT cushion is the reserve of holding pressure.
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