Injection Molding
1 views
CEF surface tiger stripes
Problem Phenomenon
The surface of the CEF injection molded part has tiger stripes with alternating light and dark stripes, width 2-5mm
Cause Analysis
The injection speed is unstable and the melt front fluctuates, sometimes fast and sometimes slow; the mold temperature is low <30°C and the front cools rapidly
Solution
1) Multi-stage injection slow-fast-slow to stabilize the front; 2) Increase the mold temperature to 40-50°C; 3) Increase the injection pressure for stable advancement
Key Takeaway
Tiger stripes are caused by unstable injection front; multi-stage injection and high mold temperature are the key
Was this helpful?
0 people found this helpful
Thank you for your feedback!