Molds & Tooling
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PVA product elliptical deformation
Fenómeno do problema
PVA round product ovality after demolding >1.03
Análise das causas
Asymmetric demolding force, product deformed by lateral force; uneven cooling, different shrinkage in each direction
Solução
1) Uniform ejection design, 8-point ejection to avoid lateral force; 2) Annular uniform cooling; 3) Extend cooling time for full setting
Conclusão principal
Elliptical deformation is caused by asymmetric demolding force; uniform ejection is the key
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