PET Preform Surface Flow Marks

Problembeschreibung

Ripples on the preform body.

Ursachenanalyse

Unstable melt front, uneven hot runner temperature.

Lösung

①Stabilize speed; ②hot runner calibration; ③raise mold temperature.

Wichtigste Erkenntnis

Flow marks = melt front.

PET; preform; flow mark; hot runner; speed

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