Injection Molding
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CEF injection warpage deformation
Problem Phenomenon
The CEF injection molded part warps 2-3mm/100mm after demolding, and the flatness does not meet the standard
Cause Analysis
CEF has a large shrinkage rate and uneven mold temperature leads to anisotropic shrinkage differences; improper gate position causes flow orientation stress to be released unevenly; insufficient cooling time
Solution
1) Increase the mold temperature to 40-60°C to reduce the temperature difference; 2) Increase the holding pressure to 50-70MPa; 3) Optimize the gate position to make the flow uniform; 4) Extend the cooling time; 5) Annealing treatment to release residual stress
Key Takeaway
Warpage is caused by shrinkage differences and orientation stress; uniform mold temperature and holding pressure are the key
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