Warm isostatic press

Cold isostatic press

Cold isostatic pressing technology refers to isostatic pressing molding technology in a room temperature environment, usually using rubber and plastic as the coating mold material, using liquid as the pressure medium, the pressure is 100-630Mpa, mainly used for powder molding. The powder mixture is isostatically pressed, evenly applied pressure from all directions, compacted and encapsulated.

Isostatic pressing confining a metal powder within a flexible film or sealed container, acting as a pressure barrier between the powder and the surrounding pressurized medium, liquid or gas. Its purpose is to provide prefabrics for further processes such as sintering, forging or hot isostatic pressing, and isostatic presses can also be used to compress pharmaceutical granules and raw materials into predetermined shapes. The use of this pressurization system ensures uniform compaction pressure over the entire powder mass and uniform density distribution of the final product.

Peculiarity:

1. High compacted density. Samples prepared by isostatic pressing have a density 5-15% higher than unidirectional and bidirectional molding.

2. The crushing density is uniform and consistent, in the molding forming, whether it is unidirectional or two-way pressing, due to the existence of frictional resistance between the powder and the steel mold and the decreasing of the forming pressure in the transmission process, there will be uneven distribution of the compacted density, and the difference in density can often reach more than 10% when pressing complex shapes. In isostatic forming, the difference is <1%.

3. Samples with large length ratio and complex shape can be prepared. Because the force is consistent everywhere and the density distribution is uniform, samples with large length-to-diameter ratios and complex shapes can be made.

4. The isostatic pressing molding process generally does not need to add lubricant to the powder, which not only reduces the pollution of the product, but also simplifies the manufacturing process.

5. Isostatic pressing products have superior performance and lower sintering temperature than samples prepared by other molding methods.

6. The disadvantage of isostatic pressing molding is that the process efficiency is low and the equipment is expensive.