A Three-dimensional Numberical Simulation of Filling Process in Injection Molding

摘要

This paper presents a numerical method for simulating the mold-filling in three dimensional thin parts , together with the delivery systerm. The theoretical model to simulate the filling is based on generalized Hele-Shaw flow for an inelastic, non-Newtonian fluid under non-isothermal condition. The mathematical model combines the finite-element (FEM )/finite-difference (FDM) formulation with the flow-analysis network (FAN) approach to form a control-volume scheme that handles automatic melt-front advancement in three dimensional thin geometries. The complex thin parts of variable thickness can be modeled and dis-cretized by flat triangular elements which may have arbitrary orientation iri three dimensional space. The results obtained from this simulation for different test case have been compared with experimental data and a favorable agreement has been noticed.