Ceramic Isostatic Pressing Toolings

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Ceramic Isostatic Pressing Toolings

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Ceramic Isostatic Pressing Toolings

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Ceramic Isostatic Pressing Toolings


Isostatic press forming

 

Isostatic pressure molding method, also known as hydrostatic molding, is a forming method using the incompressibility of liquid medium and uniform transfer of pressure. That is to say, the pressure on the sample in the high-pressure vessel is the same as the pressure on the static water in the same depth, so it is called hydrostatic or static pressure, and the molding process obtained according to this principle is called hydrostatic molding or isostatic molding. Generally, isostatic pressure of ceramic materials can be divided into wet bag isostatic pressure and dry bag isostatic pressure.

 

Compared with dry pressing forming method, the biggest characteristic of isostatic pressing forming method is that the powder material is in the state of three-way compressive stress, so the performance and quality of forming parts are improved significantly.

 

The advantages of isostatic pressing are as follows:

 

1. Dry pressing molding has only one to two compression surfaces, while isostatic pressing molding is multi-axial pressure, that is, multi-directional pressure and multi-surface pressure, which is conducive to the powder compaction to a comparable density. At the same time, the linear displacement of powder particles is small, and the friction work consumed in the movement of powder particles is relatively small, which improves the pressing efficiency.

 

2. Compared with other pressing forms with roughly the same pressure strength, isostatic pressing can obtain a higher density of green billet, and it is uniformly dense in all directions, and does not change greatly because of different shape thickness.

 

3. Since there is little difference in the direction of pressure in isostatic pressing forming, the friction between powder particles and between particles and models is significantly reduced, so the phenomenon of stress in green billet is rarely seen.

 

4. The green blank formed by isostatic pressing has high strength, uniform internal structure and no particle orientation arrangement.

 

5. Isostatic press molding using powder water content is very low (generally in 1%-3%), do not need or rarely use adhesive and lubricant. This is beneficial for reducing drying shrinkage and burning shrinkage.

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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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