Sequential and global optimization in powder injection molding processing

Authors

  • Ghassane Ayad Femto-ST Institute, Department of Applied Mechanics, ENSMM Besançon 24 Rue de l’Epitaphe, 25000, Besançon, France
  • Thierry Barriere Femto-ST Institute, Department of Applied Mechanics, ENSMM Besançon 24 Rue de l’Epitaphe, 25000, Besançon, France
  • Jean-Claude Gelin Femto-ST Institute, Department of Applied Mechanics, ENSMM Besançon 24 Rue de l’Epitaphe, 25000, Besançon, France
  • Jiupeng Song Femto-ST Institute, Department of Applied Mechanics, ENSMM Besançon 24 Rue de l’Epitaphe, 25000, Besançon, France and Department of Applied Mechanics, Southwest Jiaotong University
  • Baosheng Liu Department of Applied Mechanics, Southwest Jiaotong University

DOI:

https://doi.org/10.13052/REMN.17.843-855

Keywords:

powder injection molding, processing stages, sintering, overall optimization

Abstract

The work is focused on the overall optimization associated to powder injection molding (PIM). The PIM process includes four main stages, from the mixture of the powders and binders to the final sintering stage. Injection and sintering stages are considered to be the most important for optimization, as they mostly affect the final quality of the produced components. The injection stage shapes the green parts but initiates powders segregation that will be inherited and amplified by the sintering stage to finally appear in the resulting products. One first introduces an optimization loop based on the surfaces response method to minimize the powder segregation. Then the results are transferred to a sintering optimization loop applied through an experimentally calibrated thermo-mechanical creep model to predict the shrinkage and density contours on the final parts. The overall optimization combines both optimizers based on the developed simulation tools to provide a realistic way to improve the PIM process design accounting the different processing stages.

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References

Ayad G., Barriere T., Gelin J.C., “Optimization of powder segregation occurring in metal

injection molding of stainless steels”, Int. J. of Forming Process, vol. 9, n° 1, 2006, p. 9-28.

Barriere T., Physique et Technologie du Moulage par Injection de Poudres, Mémoire d’HDR,

Université de Franche-Comté, décembre 2005, p. 1-214.

Barriere T., Gelin J.C., Liu B., “Experimental and numerical analyses of powder segregation

on the properties and quality of parts produced by MIM”, Powder Metall., vol. 44, n° 3,

, p. 228-234.

Belytschko T., Krongauz Y., Organ D., Fleming M., Krysl P., “Meshless methods: An

overview and recent developments”, Comput. Methods Appl. Mech. Engrg., vol. 139,

, p. 3-47.

Bordia R.K., Scherer G.W., “On constrained sintering-I Constitutive model for a sintering

body”, Acta Metall., vol. 36, n° 9, 1988, p. 2393-2397.

Gelin J.C., Barriere T., « Ségrégation de phases dans les écoulements de polymères fondus

chargés en poudres métalliques », Mécanique et Industries, Ed. by EDP Sciences, vol. 5,

n° 4, 2004, p. 429-440.

German R.M., Bose A., Injection moulding of metal and ceramics, Princeton, MPIF, 1997.

He Z., Ma J., “Constitutive modeling of alumina sintering: grain-size effect on dominant

densification mechanism”, Comp. Mater. Sci., vol. 32, 2005, p. 196-202.

Kang S-J.L., Kang Y.I., “Sintering kinetics at final stage sintering: model calculation and map

construction”, Acta Mater., vol. 52, 2004, p. 4573-4578.

Liksonov D., Experimental and numerical study of the manufacturing and behavior of the

formal THR components produced by injection molding of fiber composite and by

powder technologies, Ph. D Thesis, University of Franche-Comté, 2006.

Nayroles B., Touzot G., Villon P., La Méthode des Eléments Diffus, Comptes Rendus de

l’Academie de Sciences, 313, série II, Paris, France, 1991, p. 133-138.

Song J., Gelin J.C., Barriere T., Liu B., “Experiments and numerical modelling of solid state

sintering for 316L stainless steel components”, J. Mater. Process. Technol., vol. 177,

, p. 352-355.

Vergara F.E., Khouja M., Michalewicz Z., “An evolutionary algorithm for optimisation

material flow in supply chains”, Computers & Industrial Engineering, vol. 3, 2002,

p. 407-421.

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Published

2008-07-19

How to Cite

Ayad, G. ., Barriere, T. ., Gelin, J.-C. ., Song, J. ., & Liu, B. . (2008). Sequential and global optimization in powder injection molding processing. European Journal of Computational Mechanics, 17(5-7), 843–855. https://doi.org/10.13052/REMN.17.843-855

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Original Article