Molds & Tooling
5 görüntüleme
Internal shrinkage voids of PU
Sorun Belirtisi
Shrinkage voids of 0.5-2mm diameter in the center of PU thick-walled products
Neden Analizi
After cooling of thick-walled area, interior shrinks but surface already solidified, cannot be fed; holding time insufficient, gate freezes too early
Çözüm
1) Extend holding time until the gate is completely frozen; 2) Increase gate size to delay freezing; 3) Product design to reduce wall thickness differences
Temel Çıkarım
Shrinkage voids are caused by thick-wall shrinkage and insufficient holding; extending holding is key
Bu faydalı oldu mu?
0 kişi bunu faydalı buldu
Geri bildiriminiz için teşekkürler!