Molding Process
12 görüntüleme
POM weld line weak strength
Sorun Belirtisi
Fracture at the weld line.
Neden Analizi
POM crystallizes extremely fast, the melt fronts freeze quickly where they meet, and the molecular entanglement window is extremely short; cold fronts inevitably produce weak weld lines.
Çözüm
①Increase melt temperature (still must be <230℃) or mold temperature; ②increase injection speed; ③adjust the gate so the weld line avoids the stressed area; ④vent at the meeting point.
Temel Çıkarım
POM weld lines = racing against crystallization speed.
Bu faydalı oldu mu?
0 kişi bunu faydalı buldu
Geri bildiriminiz için teşekkürler!