Validation of three-dimensional moldflow filling analysis for TPV's.

摘要

The objective of this study was to compare the flow front behavior during the filling phase of injection molding process predicted by computer simulation to that obtained experimentally. Several commercially available blends of ethylene propylene diene rubber terpolymer and polypropylene were used as the materials in this study. They were injection molded at high injection rates to ascertain how accurately the simulation studies predict the flow behavior to high shear rates. For the simulation studies, Moldflow's three-dimensional Stokes analysis' advantages and limitations were found with respect to conventional 2.5-dimensional Hele-Shaw flow approximation and three-dimensional Navier-Stokes analysis with inertia effects included. Based on analysis time, fill time and fill pressure prediction, flow front advancement, and effect of material characteristics, the Stokes analysis was found to be the most favorable option compared to the other two.