Molding Process
8 görüntüleme
PU Extruded Film Thick Edges and Thin Middle
Sorun Belirtisi
PU extruded film edges 20-30% thicker than the middle, thickness in U-shaped distribution
Neden Analizi
Die flow channel design improper, edge resistance low and flow large; PU melt elasticity, swell larger at edges; air ring cooling edge effect different
Çözüm
1) Die with coat-hanger design to balance middle and edge resistance; 2) Fine-tune die gap slightly larger in the middle and slightly smaller at the edges for compensation; 3) Slightly reduce air volume at the air ring edges; 4) Add restrictor bar to adjust edge flow
Temel Çıkarım
U-shaped thickness is caused by die flow channel and swell differences; coat-hanger die and gap fine-tuning are key
Bu faydalı oldu mu?
0 kişi bunu faydalı buldu
Geri bildiriminiz için teşekkürler!