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