Cold Isostatic Pressing Technology

Cold Isostatic Pressing 

Principle and technology of cold isostatic press: isostatic press technology is a kind of powder molding process using closed high-pressure container products, it applies the same pressure to powder blank in all directions, so that the powder products have the most uniform density distribution and grain structure. This process is mainly used for simple or complex shaped parts requiring uniform strength and fracture resistance, but also can manufacture powder metallurgy products with large length-diameter ratio.

Cold isostatic press: cold isostatic press is a powder forming equipment under the condition of ultra-high pressure. It usually uses rubber or plastic as the mold enveloping material, takes liquid as the pressure transmission medium, exerts the same pressure on the powder blank in all directions, presses it into a predetermined shape, and provides blank for the next sintering, forging or hot isostatic pressing process.

The advantages of dry bag isostatic press are that it can achieve high automation, high production efficiency, stable product quality, suitable for large-scale industrial production, and can avoid the pollution of the working medium.

Applications of cold isostatic pressure

Cold isostatic pressing is widely used in a wide range of industries such as hard alloy, powder metallurgy, high speed steel, titanium and titanium alloy, refractory materials, graphite, crucible, ceramics, rare earth permanent magnet, crystal, medicine and food because it can make powder raw materials with high density and excellent material homogeneity. Cold isostatic pressing machine is very conducive to machining, but also can produce a variety of particularly complex shapes of products.

Prestressed steel wire winding combination frame, prestressed steel wire winding working cylinder, with floating end cover of ultra-high pressure equipment. The equipment is mainly used in refractory materials, ceramics and other powder metallurgy industry, using wet bag method dry molding. Isostatic press is based on PASCAL's principle, used for all kinds of powder products in the ultra-high pressure state molding, the finished products of good anisotropic identity, for high performance requirements, complex shape and slender ratio of large parts have a good effect. Isostatic pressure works according to PASCAL's law: "The pressure of a medium (liquid or gas) in a closed container can be transmitted equally in all directions.

The difference between dry bag isostatic press and ordinary isostatic press is that it receives the pressure of the working medium of the high pressure chamber of the isostatic press across the dry bag. Usually, the mold is fixed in the dry bag (or the dry bag is directly used as the mold). The lip of the dry bag is close to the inner wall of the high pressure chamber and the high pressure chamber to form a closed space. The pressure is transferred to the rubber mold around the dry bag, and the powder to be pressed is filled in the mold cavity. The working medium in the high pressure cavity can press the required workpiece. Strictly speaking, dry bag isostatic press is a quasi-isostatic press, that is, the anisotropic force of powder is not exactly equal, but it has no effect on the molding of thin-walled cylinder, thin-walled disc and other powder.

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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