Extrusion & Post
6 مشاهدة
Shell-core delamination of products
ظاهرة المشكلة
The product sounds dull when knocked, and separation of the skin layer and core layer is clearly visible on the cross-section
تحليل الأسباب
Mold temperature is too low; the skin layer cools rapidly while the core layer is still flowing; the shrinkage rate difference between the two components is >0.5%; holding pressure switchover position is too early
الحل
Increase mold temperature to an appropriate range (determined by the matrix material); select blended components with similar shrinkage rates; delay holding pressure switchover to over 95% filling
الخلاصة الأساسية
Shell-core delamination is the result of the combined action of cooling shrinkage differences and holding pressure conditions
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!