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Numerical simulation of injection mold filling
Author(s) -
Harry D. H.,
Parrott R. G.
Publication year - 1970
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760100404
Subject(s) - materials science , molding (decorative) , shot (pellet) , computer simulation , mold , thermal conduction , flow (mathematics) , mechanics , transfer molding , composite material , mechanical engineering , engineering , metallurgy , physics
Abstract This paper illustrates a numerical simulation of polymer flow as applied to the injection molding fill process. The simulation model considers heat conduction and viscous heat generation along with the temperature dependence of the flow parameters to predict fill lengths and fill times of thin constant crossection cavities. This simulation is designed for molding situations where fill is difficult, such as thin cavity sections, long flow length requirements, or difficult‐to‐process materials. The simulation sensitivity is explored by performing experimental molding trials with two different cavity thicknesses. The thinner cavity illustrated a short shot in all cases with the thick cavity completely filling. The simulation accurately distinguishes between the short shot and fill conditions, although significant error is noted for the length prediction of the short shot and the time‐to‐fill of the full shot condition.