Extrusion & Post
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Dimensional Out of Tolerance of PBT Injection-Molded Products
Problembeschreibung
The product dimensions exceed the drawing tolerance requirements, resulting in poor assembly.
Ursachenanalyse
The mold dimension design does not consider the fluctuation range of PBT shrinkage; the process parameters are unstable and the shrinkage changes; the environmental temperature and humidity have an influence.
Lösung
Reserve a shrinkage correction allowance in mold design; stabilize the process parameters; inspect the product after full annealing.
Wichtigste Erkenntnis
PBT dimension control is a core requirement for precision parts such as connectors.
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