Injection Molding
4 Aufrufe
Premature Gate Freezing in PU '2079851475616104452
Problembeschreibung
PU injection molded product gate freezes within 0.5-1s in the holding stage, holding pressure cannot be transmitted, product sink marks severe
Ursachenanalyse
Gate size too small, diameter <1mm, causing rapid freezing; injection temperature too low; mold temperature too low accelerating gate cooling
Lösung
1) Increase gate diameter to 1.5-2mm; 2) Increase injection temperature to 60-120°C; 3) Increase mold temperature to 40-50°C to delay gate freezing; 4) Holding pressure stepwise decay rather than sudden release
Wichtigste Erkenntnis
Premature gate freezing is caused by small gate and low temperature; enlarging the gate and increasing temperature are the fundamental measures
War das hilfreich?
0 Personen fanden dies hilfreich
Vielen Dank für Ihr Feedback!