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