Cold Isostatic Pressing
Cold isostatic pressing technology, (Cold Isostatic Pressing, referred to as CIP) is at room temperature, usually with rubber or plastic as the mold material, with liquid as the pressure medium is mainly used for powder material molding, for further sintering, forging or The hot isostatic pressing process provides the green body. The general operating pressure is 100~630MPa.
Advantages of Cold Isostatic Pressing
1.Highest safety.
2.Outstanding cycle life.
3.Superior process control at all pressure levels.
4.Programmable pressure distribution with good accuracy.
5.Reduced mechanical stresses of processed materials.
6.Lowest weight of the machine.
7.Process optimization.
8.Improved functionality.
There are two types of cold isostatic pressing: wet bag and dry bag.
In the wet bag method the mold is removed and refilled after each pressure cycle. This method is suitable for compaction of large and complicated parts.
In the dry bag method the mold is an integral part of the vessel. The dry bag method is used for compaction of simpler and smaller parts.
Applications of Cold Isostatic Pressing
1. Powder Metallurgy
Cold isostatic pressing is used in powder metallurgy. It is used for the compacting step of powder metallurgy that comes just before the sintering step. In powder metallurgy, CIP is often used to produce complex shapes and dimensions.
2. Refractory Metals
CIP is used to produce refractory metals. They include tungsten, molybdenum, and tantalum. Tungsten, for example, is used to manufacture wires for filaments in the lamp industry. Generally, refractory metals have a high melting point and are resistant to wear and tear.
3. Sputtering Targets
Cold Isostatic Pressing (CIP) can press indium tin oxide (ITO) powder into large ceramic preforms, which are then sintered under certain conditions. This method can theoretically produce ceramic targets with a density of 95%.
4. Automobiles
Cold isostatic pressing is used in manufacturing automobile components. Some of these components include bearings and oil pump gears.
5. Sintering
Cold isostatic pressing usually comes right before sintering. Cold isostatic pressed products usually have a high green strength that allows them to be sintered faster than other materials.
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