​ISO Molds for Powder Metallurgy

ISO Molds for Powder Metallurgy

Isostatic pressing

The pressure directly acts on the powder body or the elastic die sleeve, so that the powder body is evenly compressed in all directions at the same time, and the process of crushing with uniform density distribution and high strength is obtained. According to its characteristics, it is divided into two categories: cold isostatic pressing and hot isostatic pressing.

(1) Cold isostatic pressing

That is, isostatic pressing at room temperature, and liquid is the pressure transmission medium. The powder body is loaded into the elastic mold, placed in the steel body sealed container, and the liquid is pressed into the container with a high pressure pump. The powder body in the elastic mold is evenly compressed by using the characteristics of uniform liquid pressure transfer. Therefore, the cold isostatic pressing compact has high density, more uniform, better mechanical properties, large size and complex shape, and has been used in the production of bars, pipes and large-scale products.

(2) Hot isostatic pressing

The process by which powder bodies crushed or packed into special containers are placed in high pressure containers of hot isostatic presses and subjected to high temperature and pressure so that these powder bodies are pressed and fired into dense parts or materials. The isostatic pressing at high temperature can activate the phenomenon of diffusion and creep, promote the atomic diffusion and recrystallization of the powder and plastic deformation at a very slow rate, and the gas is the pressure transfer medium. The powder body is subjected to the joint action of high temperature and high pressure in the isostatic pressure container at the same time, which strengthens the pressing and sintering process, the pressing pressure and sintering temperature of the product are lower than that of the cold isostatic pressing, the density and strength of the product are high, and the uniformity is uniform, the grain is small, the mechanical properties are high, the defects and pores between the particles inside the material are eliminated, and the shape and size are not limited. But the hot isostatic press price is high, the investment is large. Hot isostatic pressing has been used in the production of powder high speed steel, refractory metal, superalloy and cermet.

    Jiangsu High Industry on the research and development and production of high-performance polyurethane isostatic pressing molds. Through in-depth cooperation with many isostatic pressing equipment manufacturers and in-depth study of the industry, the developed isostatic pressing polyurethane mold series products have the characteristics of long service life, high precision, small deformation, easy demoulding, etc., and are widely used in ceramics, etc. Static pressing mould, cemented carbide isostatic pressing mould, rare earth permanent magnet material isostatic pressing mould, graphite isostatic pressing mould, etc.

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