Extrusion & Post
12 مشاهدة
Transverse Ripples on EVOH Extruded Film
ظاهرة المشكلة
EVOH extruded film surface shows transverse periodic ripples with wavelength 5-10mm
تحليل الأسباب
Haul-off roller vibration or unstable rotation speed producing periodic stretching changes; chill roll eccentricity or out-of-round surface causing periodic contact pressure changes
الحل
1) Overhaul haul-off rollers to eliminate vibration; 2) Re-round chill roll with eccentricity <0.02mm; 3) Install pressure stabilizing device on extruder to eliminate pressure fluctuations; 4) Stably control haul-off speed ±0.5%
الخلاصة الأساسية
Transverse ripples are caused by haul-off vibration and roll eccentricity; equipment overhaul and stable control are key
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!