Blow Molding
10 Aufrufe
HDPE '2079851475616104457 container melt fracture
Problembeschreibung
The parison surface is rough like sharkskin, and the container surface becomes rough accordingly.
Ursachenanalyse
Exit shear stress exceeds the critical value; low mold temperature and fast extrusion speed; more obvious when the regrind ratio is high.
Lösung
①Change the extrusion pressure/speed; ②adjust the back pressure; ③reduce the regrind ratio; ④check the head heating band; ⑤increase the die temperature.
Wichtigste Erkenntnis
For rough parison, first adjust the pressure-temperature combination.
War das hilfreich?
0 Personen fanden dies hilfreich
Vielen Dank für Ihr Feedback!