Injection Molding
8 مشاهدة
PET Injection Preform Black Specks
ظاهرة المشكلة
Black small dots appear on the preform, more obvious after bottle blowing.
تحليل الأسباب
Carbonized material at dead corners of the barrel/hot runner falls off; PET is sensitive to heat history, and regrind or contamination also introduces black specks.
الحل
①Clean the hot runner and barrel dead corners; ②avoid long-time heat preservation; ③control regrind cleanliness; ④thoroughly purge when changing material.
الخلاصة الأساسية
Preform black specks = dead-corner carbonization.
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!