Injection Molding
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PP Injection Part Short Material—Poor Venting Type
Problembeschreibung
Repeated material shortage at specific positions despite already high pressure and speed.
Ursachenanalyse
That location is the last filling point with poor venting; trapped gas back pressure prevents the melt from filling—often misjudged as insufficient pressure.
Lösung
①Open venting at the shortage location; ②confirm the last filling point with the short shot method; ③optimize gate position to change the filling end; ④decelerate at the end.
Wichtigste Erkenntnis
Repeated fixed-point shortage = poor venting—locate with the short shot method.
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