The merit of short cyclic period, low cost, high precision and high strength have made the process of resin transfer molding more and more attractive to the automobile, aerospace, and precision industry. And the main advantage of metal injection molding is in large production of small, complex, and high density component parts. However, their physical and chemical phenomena during the manufacturing process has not been understood throughtfully. The quality of the products is thus not under control and the automation of the process is impossible. The accurate relations between saturation and capillary in the porous media such as fiber and powder can’t be described, especillary in the numerical analysis. In this article, a centrifuge equipment is designed to simulate the capillary effect and the wax is heated beyond its melting point to be the working fluid. Curve of capillary versus to saturation is sketched and the relations of saturation, capillary, porosity, and permeability are discussed. A function for saturation in the porous media is developed. The function can provide effective micro references to the numerical simulations.

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