Injection Molding
6 görüntüleme
PETG '2079851475616104452 poor venting, burning
Sorun Belirtisi
Burnt black spots appear at the end or thin-wall areas of PETG injection molded products.
Neden Analizi
Poor cavity venting, air is compressed and heated scorching the material, injection speed too fast and air has no time to escape.
Çözüm
Deepen the vent groove depth to 0.02-0.03mm; reduce injection speed; add parting line venting; use vacuum venting.
Temel Çıkarım
PETG burning is caused by air retention; improving venting is the most direct measure.
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