Analysis of Phase Segregation Effects Arising in Fluid-particle Flows during Metal Injection Molding
The Metal Injection Molding technology is suitable to manufacture small and very
complex parts. A key problem in the manufacturing process is to avoid segregation of metal
powders and plastic binder, which may provoke undesirable distortions during the sintering
stage. A bi-phasic flow model has been developed to describe the segregation phenomena.
The volume fractions for both phases are key field variables that represent the segregation
effect. Concerning numerical aspects, different methods are proposed to solve the advection-diffusion
equations, that govern the variation of volume fractions during the injection stage.
Numerical examples are presented proving the efficiency of the proposed methods.
Thierry BARRIERE, Boasheng LIU, Jean-Claude GELIN
Reçu le 6 août 2001.
Accepté le 25 septembre 2001.
Metal injection molding, advection-diffusion equation, powder segregation.