Molds & Tooling
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Twisting deformation of PU products
Fenómeno del problema
PU products twist 2-3°/100mm along the axis
Análisis de la causa
Asymmetric cooling causes shrinkage differences on each face, producing twisting moment; gate position produces asymmetric flow orientation
Solución
1) Symmetric cooling design to ensure uniformity of each face; 2) Symmetrical gate arrangement; 3) Annealing to release twisting stress
Conclusión clave
Twisting deformation is caused by asymmetric cooling; symmetric cooling is key
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