Molds & Tooling
3 Aufrufe
COC Demolding Damage
Problembeschreibung
COC products crack, whiten or surface scratched during ejection, deep-cavity transparent parts have obvious ejection marks, automated demolding interruption rate high.
Ursachenanalyse
COC is rigid and brittle, ejection stress concentration easily cracks; insufficient draft angle and undercut structure make demolding resistance too large; small ejector pin area concentrates pressure and damages the surface.
Lösung
①Adopt as large draft angle as possible (refer to polystyrene standard); ②minimize undercuts; ③configure sufficient number of large-area ejector pins or stripper plate demolding; ④optimize ejection speed curve for slow start.
Wichtigste Erkenntnis
COC demolding design standard aligns with PS; large draft angle and large-area ejection are the two iron rules; ejection damage prevention of brittle materials beats all post-remediation.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
War das hilfreich?
0 Personen fanden dies hilfreich
Vielen Dank für Ihr Feedback!