Extrusion & Post
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EEA Vacuum Section Material Overflow
Problembeschreibung
Material overflows at the vacuum vent section during EEA extrusion, vent hole blocked
Ursachenanalyse
EEA melt viscosity is low and overflows at the vacuum section; vacuum section temperature is high, viscosity even lower, aggravating overflow; improper vent hole design
Lösung
1) Lower the vacuum section temperature by 5-10°C to increase viscosity; 2) Add a baffle above the vent hole to prevent overflow; 3) Increase screw speed to accelerate conveying and reduce residence
Wichtigste Erkenntnis
Overflow is caused by low melt viscosity; lowering temperature and adding a baffle are key
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