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