Molds & Tooling
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MP Product Elliptical Deformation
Problem Phenomenon
Ellipticity of MP circular products after demolding >1.03
Cause Analysis
Asymmetric demolding force deforming the product under lateral force; non-uniform cooling with different shrinkage in each direction
Solution
1) Uniform ejection design with 8-point ejection to avoid lateral force; 2) Annular uniform cooling; 3) Extend cooling time for full setting
Key Takeaway
Elliptical deformation is caused by asymmetric demolding force; uniform ejection is key
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