Injection Molding
3 views
DSTDP injection flow marks
Problem Phenomenon
DSTDP injection molded product surface shows radial flow marks centered on the gate
Cause Analysis
Injection speed too fast causing unstable melt front; 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 the gate
Key Takeaway
Flow marks are caused by unstable injection front and rapid cooling; multi-stage injection and high mold temperature are key
Was this helpful?
0 people found this helpful
Thank you for your feedback!