Injection Molding
7 görüntüleme
PP Injection Part Sink Mark—Freeze-off Type
Sorun Belirtisi
Although the gate is small and holding time is already long, thick walls still have sink marks.
Neden Analizi
The small gate freezes off early, and holding pressure cannot continue to transmit to thick-wall areas; no matter how long the holding time, it is ineffective.
Çözüm
①Enlarge the gate to delay freeze-off; ②place the gate near thick-wall areas; ③reduce material at thick walls; ④auxiliary gates if necessary.
Temel Çıkarım
Holding after freeze-off = ineffective feeding—the gate is the key.
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