Hot Isostatic Press
The Insmart Hot Isostatic Press is capable of generating pressures up to 2000 bar and simultaneously maintaining temperature up to 2000 degree Celsius.
The HIP (Hot Isostatic Press) uses Argon gas as compression media. The main features of this system are listed below. The HIP first compresses the Argon gas from the cylinders to a pressure of 400 bar using a hydraulic compression system. This chamber acts as a intermediate pressure buffer during the operation.
The intensifier of this stage pressurizes the gas from the precompression stage, in programmable steps to the desired pressure (upto a maximum pressure of 2000 bar) for injection into the next stage.
Theory of Operation and Important Features
High Pressure High Temperature Chamber:
This stage has an inbuilt electrical heating element which can maintain the temperature of the chamber upto a maximum temperature of 2000 degree Celsius. The chamber is made of special steel which is capable of withstanding very high variations in temperature and pressures over tens of thousands of cycles. It is also fitted with prestressed shrink fitted rings. Strategically located water channels in the outer periphery are used for cooling this chamber. The machine incorporates molybdenum heating element when the maximum temperature for the furnace is 1600 degree Celsius (In inert argon atmosphere). When the maximum temperature is 2000 degree Celsius Tungsten/Graphite (In inert argon atmosphere) element is used. A vacuum pump is used to evacuate the air from the chamber to facilitate oxygen removal and filling argon into the system.
Yoke and Telescopic loading system:
The HIP has a yoke, which holds the top sealing plug against the pressure developed in the high pressure high temperature chamber. The Telescopic loading system allows the user to quickly load and unload the material from the top.
The HIP system first attains a temperature which is desired. Then the pressurization cycle starts which injects incremental volume of argon into the high temperature high pressure chamber to obtain the desired set pressure. If in any case the pressure inside the vessel exceeds the desired pressure a servo actuated valve will leak the argon gas into a silencer (which also drops the temperature of the gas) and finally the gas is released to atmosphere. An elaborate set of safety interlocks make HIP intrinsically safe.