Injection Molding
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Glass Fibre '2079851475616104452 flow marks
Problem Phenomenon
Glass Fibre injection molded product surface shows radial flow marks centered on gate
Cause Analysis
Injection speed too fast causes melt front instability; mold temperature too low <30°C, front rapidly cools forming marks
Solution
1) Adopt multi-stage injection speed slow-fast-slow to control front stability; 2) raise mold temperature to 40-50°C to delay front cooling; 3) stabilize injection pressure to avoid fluctuation; 4) enlarge gate area to reduce pressure sudden change at gate
Key Takeaway
Flow marks are caused by injection front instability and rapid cooling; multi-stage injection and high mold temperature are key
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