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A Study on the Effects of Filling and Packing Phases on Injection Molding Process  

김현필 (창원기능대학 컴퓨터응용금형과)
김용조 (경남대학교 기계자동화공학부)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.11, no.4, 2002 , pp. 44-53 More about this Journal
Abstract
Injection molding process factors such as molding temperature, injection pressure, flow rate and flow velocity, must be controlled properly in filling and packing phases in the injection molding process. In this study, effects of these factors on the injection molding were investigated through the flow analysis for the filling and packing phases. Molding troubles like flow mark weld line, sink ma가 short shot and warpage car be caused by these injection molding process factors. Among them the short shot was caused by the fact that the packing pressure could not reach properly to the filling end part in the packing phase and hence the flow rate could not be supplied to the full. In addition as the flow rate for the volumetric shrinkage during the f개zen phase could not be supplied Properly by the packing pressure, the short shot appeared. Here, the volumetric shrinkage reduced with increasing the packing pressure and also the warpage of molded part increased with increasing the packing Pressure.
Keywords
Injection Molding process; Flow Analysis; Filling Phase; Packing Phase;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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