Injection Molding
7 مشاهدة
EEA injection flow marks
ظاهرة المشكلة
Radial flow marks centered on the gate appearing on the EEA injection molded product surface
تحليل الأسباب
Injection speed too fast causing unstable melt front; mold temperature too low <30°C, front cooling rapidly forming marks
الحل
1) Adopt multi-stage injection speed slow-fast-slow to control front stability; 2) Increase mold temperature to 40-50°C to delay front cooling; 3) Stabilize injection pressure to avoid fluctuation; 4) Increase gate area to reduce pressure sudden change at the gate
الخلاصة الأساسية
Flow marks are caused by unstable injection front and rapid cooling; multi-stage injection and high mold temperature are the key
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