Abstract
Numerical simulations and experimental studies concerning gas and melt flow during gasassisted injection molding of a thin, angle bracket part with gas channel design were conducted. Distribution of skin melt thickness along the gas flow direction was measured. Melt and gas flow within the gas channel of a quadrantal cross-section is approximated by a model which uses a circular pipe of equivalent hydraulic diameter superimposed on the thin part. An algorithm based on a control-volume/finite-element method combined with a particle-tracing scheme suitable for two-component flow front advancements is utilized and numerically implemented to predict both melt and gas front advancements during a molding process. Simulated results on the distribution of gas penetration show reasonably good coincidence with experimental observations.
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