Molds & Tooling
11 مشاهدة
Product stress cracking
ظاهرة المشكلة
Fine cracks appear on the surface of PEI products during placement or use
تحليل الأسباب
Large internal stress generated during molding; mold temperature too low <120°C, quenching freezes the stress; the product geometry has stress concentration features such as sharp corners
الحل
Increase the mold temperature to 150-180°C to slow cooling; anneal the product after demolding at 200°C/2h to eliminate internal stress; optimize product design to avoid sharp corners and abrupt cross-section changes
الخلاصة الأساسية
Annealing is an effective method to eliminate internal stress and prevent cracking in PEI products
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