3D Flow Simulation of Injection Molding with Iterative Method
Cao Wei,Shen Changyu,Wang Rui
(Mold Center, Zhengzhou University, Zhengzhou, China 450002)

Abstract: The major drawbacks of the Hele-Shaw approximation, commonly used today as a mean of simplifying the simulation of the injection molding process, are inherent loss of the ability to predict important physical phenomena and the ambiguity involved in the definition of a mid-plane. To overcome the difficul ties, a fully three-dimensional mold filling simulation program is developed. The governing equations are established for incompressible, non-Newtonian fluid under nonª²isothermal conditions. To avoid the simultaneous determination of the sefields, a quasi-steady technique is introduced to solves the components inde pendently at any given time step. The iterative procedure is employed to get the final solution of the coupled equations. It is found that the memory requirements are reduced and the stability of numerical scheme is enhanced during the whole simulation. A good agreement with the experiments dernonstrates the capacity of this method to predict important flow features in injection molding.
Keywords: mid-plane, three-dimensional flow, finite element method, iteration.