Injection Molding
4 views
POE '2079851475616104452 multi-cavity filling imbalance
Problem Phenomenon
POE injection 8-cavity mold, cavity filling amount difference ±15%, some cavities short shot, some flash
Cause Analysis
Runner design unbalanced, runner length and resistance of each cavity inconsistent; gate sizes of each cavity inconsistent
Solution
1) Adopt balanced runner design to ensure equal length and equal resistance of runners to each cavity; 2) Gate sizes of each cavity precisely consistent ±0.01mm; 3) Reduce injection speed to reduce resistance difference influence; 4) Use mold flow analysis software to optimize runner design
Key Takeaway
Multi-cavity filling imbalance is caused by runner design; balanced runners and mold flow analysis are key
Was this helpful?
0 people found this helpful
Thank you for your feedback!