Injection Molding
3 views
EMA Injection Gate Freezes Too Early
Problem Phenomenon
The gate of EMA injection molded products freezes within 0.5-1s during the holding stage, holding pressure cannot be transmitted, product shrinkage severe
Cause Analysis
Gate size too small, diameter <1mm, causing rapid freezing; injection temperature low; mold temperature low, accelerating gate cooling
Solution
1) Increase gate diameter to 1.5-2mm; 2) Increase injection temperature to 160-210°C; 3) Increase mold temperature to 40-50°C to delay gate freezing; 4) Holding pressure decays in steps rather than sudden release
Key Takeaway
Premature gate freezing is caused by small gate and low temperature; enlarging the gate and increasing temperature are fundamental measures
Was this helpful?
0 people found this helpful
Thank you for your feedback!