Isostatic Pressing Molds

Isostatic Pressing Molds

Isostatic pressing is to place the object to be processed in a specific mold, and then put the mold containing the workpiece into a closed container filled with liquid. It is gradually pressurized through a pressurization system, and the pressure is transmitted through the liquid, so that the object Each surface of the mold is subject to equal pressure, and the molding process is carried out under the constraints of the mold. During the compression process, the distance between the molecules of the actual workpiece is reduced and the density increases, causing the physical and even chemical properties of the pressed items to change.

Isostatic press is a molding equipment that works under ultra-high pressure. Isostatic presses are further divided into cold isostatic presses at normal temperature, warm isostatic presses at medium temperatures, and hot isostatic presses at high temperatures. The isostatic press uses oil, water or gas as the working medium to apply ultra-high pressure in all directions to all surfaces of the object. It can make the molded workpiece have high and uniform density, uniform sintering shrinkage and easy machining. It is widely used in magnetic materials, ceramics, cemented carbide, high temperature refractory materials, rare earth permanent magnets, carbon materials, rare metal powders and other industries.

Isostatic pressing technology uses Pascal's principle to place the pressed material sealed in a flexible mold or the solid workpiece with a sealed shell into a high-pressure cylinder filled with fluid pressure medium, and use high-pressure equipment to exert a certain force on the pressure medium in the cylinder. Pressure is transmitted equally in all directions to the interface of the flexible mold or workpiece through the pressure medium, causing the pressed material or workpiece to undergo a certain volume deformation under the action of isostatic pressure, thereby achieving isostatic pressing. If the pressed material is a powdery substance, when the pressure acts equally on the surface of the flexible mold, the powder in the package will be uniformly compressed and densified, and its shape will be smaller than and similar to the cavity of the flexible mold.

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