Numerical simulation of free surface flows in die casting injection processes
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AuthorGómez del Pino, Pablo Joaquín; López Rodríguez, Joaquín; Faura Mateu, Félix; Hernández Rodríguez, Julio
Knowledge AreaIngeniería de los Procesos de Fabricación
SponsorsThe authors gratefully acknowledge the support of the Spanish Comisión Interministerial de Ciencia y Tecnología (CICYT) under grants TAP97-0489 and PB98-0007.
PublisherConcentration Heat and Momentum, Ltd. (CHAM)
Bibliographic CitationGÓMEZ P.,HERNÁNDEZ, J., LÓPEZ , J. FAURA, F. Numerical simulation of free surface flows in die casting injection processes. Phoenics Journal of Computational Fluid Dynamics, 13 (2): 186-203, 2000.
KeywordsProcesoso de injección
This paper presents a numerical study of the flow of molten metal in the shot sleeve of horizontal high-pressure die-casting machines during the injection process. The analysis of the wave of molten metal created by plunger motion can be of help in reducing porosity in manufactured parts caused by entrapment in the molten metal of a certain amount of the initial air in the die cavity and in the shot sleeve. The amount of trapped air can be reduced by selecting appropriate operating conditions during the injection process, which are mainly determined by the law of plunger motion, the initial shot sleeve filling fraction, and the geometrical characteristics of the shot sleeve. The proposed model, which considers the problem as two-dimensional, is based on the conservation equations of mass and momentum, and treats the free surface using a capturing method (Scalar Equation Method). Surface tension and solidification effects are neglected. Different approaches are considered to simulate ...
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