Cold Isostatic Pressing for Powder Metallurgy
Powder metallurgy forming is one of the basic processes in powder metallurgy production. The purpose is to make loose (metal, ceramic, or other materials) powders into semi-finished products with predetermined geometry, size, density and strength by pressure in a mold, and then The semi-finished blank is obtained by demoulding. The semi-finished product needs at least a subsequent sintering process to become a finished product.
Cold isostatic pressing usually seals the powder in a soft sheath, and then puts it in a liquid medium in a high-pressure container. By applying pressure to the liquid, the powder is pressed uniformly in all directions to obtain the required compact. The liquid medium can be oil, water or glycerin. The sheath material is an elastic-plastic material such as rubber. Metal powder can be directly loaded or molded to fit the sleeve. Because the powder is uniformly pressed in all directions in the sheath, a compact with a relatively uniform density can be obtained, so it is not easy to deform and crack during sintering. The disadvantage is that the dimensional accuracy of the compact is poor, and machining is required. Cold isostatic pressing has been widely used in the forming of cemented carbide, refractory metals and various other powder materials.
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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