Injection Molding
5 Aufrufe
PET Injection Preform Black Specks
Problembeschreibung
Black small dots appear on the preform, more obvious after bottle blowing.
Ursachenanalyse
Carbonized material at dead corners of the barrel/hot runner falls off; PET is sensitive to heat history, and regrind or contamination also introduces black specks.
Lösung
①Clean the hot runner and barrel dead corners; ②avoid long-time heat preservation; ③control regrind cleanliness; ④thoroughly purge when changing material.
Wichtigste Erkenntnis
Preform black specks = dead-corner carbonization.
War das hilfreich?
0 Personen fanden dies hilfreich
Vielen Dank für Ihr Feedback!