Isostatic Pressing

What is Isostatic Pressing:

Isostatic pressing technology is an advanced ultra-high pressure hydraulic equipment that utilizes the products in a closed high-pressure container to be formed under the state of equal ultra-high pressure in all directions. Isostatic pressing technology is divided into three different types: cold isostatic pressing, warm isostatic pressing and hot isostatic pressing according to the temperature during forming and consolidation.

Isostatic molding is a unique process where molding pressures are applied evenly in all directions around the part being made. This differs from compression molding, which has pressure applied in only one direction. Isostatic molding lends itself nicely to making odd shapes such as cups and buckets. An isostatically molded part is made to near net shape. Because the part is molded to near net shape, significantly less material would be used as opposed to the more standard use of blocks and cylinders. After molding, the part would be suitable for final machining.

Characteristics of isostatic pressing process:

1. Using isostatic pressing to machine the blank, the density of the blank is high and uniform, the firing shrinkage is small, and it is not easy to deform.

2. It can form slender rod-shaped or tubular green compacts that are difficult to prepare by conventional mass-pressing process.

3. The product has high strength and good machinability, which can greatly reduce the internal stress.

4. The mold is easy to make, has long service life and relatively low cost.

5. It can form large-sized blanks, and each cylinder can press multiple blanks.

Application of isostatic pressing technology:

Isostatic pressing technology was mainly used in powder forming of powder metallurgy in the initial stage: especially the manufacture of integral blisks of engines, which is of great significance in the aerospace field. The structural design and manufacturing technology of modern aero-engines is an important link in the development, development and use of engines. In the 21st century, high thrust-to-weight ratio engines require reducing structural weight and reducing development and manufacturing costs. In order to meet this stringent requirement, it must be updated Manufacturing technology and improvement of processing technology, while improving engine reliability and maintainability, increase engine thrust and thrust-to-weight ratio as much as possible, and reduce weight. The ultra-high pressure isostatic pressing technology provides an opportunity for the use of special lightweight and high-performance materials to realize the overall and lightweight molding of the engine. Similarly, isostatic pressing technology plays an excellent role in the manufacture of impellers such as civil oil pumps, and significantly improves the mechanical properties of impellers at low temperatures. In addition, isostatic pressing technology can be widely used in ceramics, casting, atomic energy, tool manufacturing, plastics and graphite and other fields, and has excellent performance in parts densification, compounding, and joining.

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