Extrusion & Post
3 Aufrufe
LDPE Film Thickness Deviation (MD)
Problembeschreibung
Longitudinal thickness fluctuates periodically, and the thickness measurement curve undulates.
Ursachenanalyse
Extrusion output pulsation (unstable feeding, screw wear) or haul-off speed fluctuation.
Lösung
①Stabilize feeding; ②measure screw clearance; ③stabilize haul-off; ④closed-loop thickness control.
Wichtigste Erkenntnis
MD fluctuation is traced to extrusion and haul-off.
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