Injection Molding
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Difficult demolding in EAA '2079851475616104452
Problem Phenomenon
EAA injection molded products have large demolding force, products deform or are scratched, demolding time accounts for 30% of the cycle
Cause Analysis
EAA has large adhesion to the mold cavity; insufficient demolding draft <0.5°; insufficient cooling time, demolding before the product is fully solidified; unreasonable ejection mechanism design
Solution
1) Increase the mold demolding draft to 1-2°; 2) Extend the cooling time so that the product is fully solidified before demolding; 3) Polish the mold surface to Ra<0.2μm; 4) Increase the ejection area and 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 the demolding draft is the fundamental measure
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