Blow Molding
5 مشاهدة
Severe Parison Sag in CMC Extrusion '2079851475616104457
ظاهرة المشكلة
In CMC extrusion '2079851475616104457, the parison sag is 20-40mm, resulting in a wall thickness of only 0.3-0.4mm at the bottle bottom
تحليل الأسباب
CMC melt strength is low and the parison stretches and thins under gravity; slow parison extrusion speed increases sag time; high parison temperature and low viscosity aggravate sag
الحل
1)Add micro-crosslinking agent 0.3-0.5wt% to increase melt strength; 2)Increase parison extrusion speed to shorten sag time; 3)Lower parison temperature by 10-15°C to increase viscosity; 4)Wall thickness controller compensates for sag
الخلاصة الأساسية
Parison sag is caused by low melt strength; micro-crosslinking and wall thickness control are the key
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!