Processing Machinery 3 Aufrufe

Internal black speck carbonization of PU

Problembeschreibung

0.1-0.5mm black speck carbonized matter appears inside PU products

Ursachenanalyse

PU carbonized by long-time heating in barrel dead zones; carbon deposits at screw head; raw material impurities

Lösung

1) Lower processing temperature to reduce carbonization; 2) Regularly clean screw and barrel; 3) Filter raw material to remove impurities

Wichtigste Erkenntnis

Black specks are caused by thermal carbonization and carbon deposits; temperature reduction and regular cleaning are key

PU internal black specks thermal carbonization screw cleaning temperature control

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