Injection Molding
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Warpage deformation of PET injection molded parts
Problembeschreibung
PET injection molded products warp after demolding, with flatness exceeding the tolerance range.
Ursachenanalyse
Uneven mold temperature distribution causes inconsistent crystallinity and shrinkage rates in various areas; uneven wall thickness causes cooling differences; molecular orientation is asymmetric.
Lösung
Equalize mold temperature (within ±3°C); design products with uniform wall thickness; optimize gate position; extend cooling time.
Wichtigste Erkenntnis
The root of PET warpage lies in uneven shrinkage.
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