Injection Molding
3 views
EMA '2079851475616104452 Demolding Difficulty
Problem Phenomenon
EMA injection molded products have large demolding force, product deformation or scratch damage, demolding time accounts for 30% of the cycle
Cause Analysis
Large adhesion between EMA and mold cavity; insufficient draft angle <0.5°; insufficient cooling time, product demolded before fully solidified; ejection mechanism design unreasonable
Solution
1) Increase mold draft angle to 1-2°; 2) Extend cooling time so the product is fully solidified before demolding; 3) Polish mold surface to Ra<0.2μm; 4) Increase ejection area, use a large-area ejector plate; 5) Spray mold release agent (temporary solution)
Key Takeaway
Demolding difficulty is caused by adhesion and insufficient mold design; increasing draft angle is the fundamental measure
Was this helpful?
0 people found this helpful
Thank you for your feedback!