Extrusion & Post
11 görüntüleme
Material Overflow at EVOH Vacuum Vent
Sorun Belirtisi
Material overflows at EVOH extrusion vacuum vent, vent hole clogged
Neden Analizi
EVOH melt viscosity low, overflowing at vacuum section; vacuum section temperature too high, viscosity even lower, aggravating overflow; vent hole design improper
Çözüm
1) Reduce vacuum section temperature by 5-10°C to increase viscosity; 2) Add baffle above vent hole to prevent overflow; 3) Increase screw speed to accelerate conveyance and reduce residence
Temel Çıkarım
Overflow is caused by low melt viscosity; cooling and adding baffle are key
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