Molds & Tooling
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Insufficient EAA flatness
Fenómeno do problema
EAA flat products with flatness >0.5mm/100mm, warped
Análise das causas
EAA shrinkage rate large and anisotropic; uneven mold cooling; residual stress release causing continuous warpage
Solução
1) Uniform mold temperature to reduce temperature difference; 2) Increase holding pressure to reduce shrinkage difference; 3) Anneal to release residual stress
Conclusão principal
Insufficient flatness is caused by shrinkage difference and stress; uniform cooling and annealing are key
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