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Abstract

The filling stage in injection molding has important effects on the final properties and quality of the parts. It is significant to predict the history of flow and heat transfer in the filling stage accurately and thus predict the part properties and quality. The modeling is based on the generalized Hele–Shaw flow of a compressible viscous fluid under non-isothermal conditions with consideration of the effects of compressibility and phase change. A hybrid FEM/FDM method combined with a control volume method was adopted to simulate the filling stage in plastics injection molding. A program was developed and compressible flow analysis of the filling stage was implemented using Visual C++. Comparison of numerical and experimental results verified the numerical algorithm and program of the compressible filling simulation. The numerical analysis also indicated that the compressibility of the material had important effects on flow field of imbalance molds.

Keywords

injection molding filling simulation flow analysis compressibility

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Numerical Simulation of Compressible Flow with Phase Change of Filling Stage in Injection Molding

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