Molds & Tooling 3 Aufrufe

Twisting deformation of PU products

Problembeschreibung

PU products twist 2-3°/100mm along the axis

Ursachenanalyse

Asymmetric cooling causes shrinkage differences on each face, producing twisting moment; gate position produces asymmetric flow orientation

Lösung

1) Symmetric cooling design to ensure uniformity of each face; 2) Symmetrical gate arrangement; 3) Annealing to release twisting stress

Wichtigste Erkenntnis

Twisting deformation is caused by asymmetric cooling; symmetric cooling is key

PU twisting deformation symmetric cooling gate arrangement annealing

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