Molds & Tooling
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EVOH Product Elliptical Deformation
Fenómeno del problema
EVOH round products ovality >1.03 after demolding
Análisis de la causa
Demolding force asymmetric, product deformed by lateral force; cooling uneven, shrinkage different in each direction
Solución
1) Uniform ejection design, 8-point ejection to avoid lateral force; 2) Annular uniform cooling; 3) Extend cooling time for full setting
Conclusión clave
Elliptical deformation is caused by asymmetric demolding force; uniform ejection is key
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