Cold isostatic pressing is divided into wet bag method and dry bag method.
Wet Bag Isostatic Pressing and Dry Bag Isostatic Pressing
Cold isostatic pressing is divided into wet bag method and dry bag method. Wet bag isostatic pressing is to put the powder into the forming mold (ie, the casing) first, and then put it in a high-pressure cylinder for pressing after sealing. During pressing, the jacket is completely immersed in the liquid, in direct contact with the pressure transmission medium. Wet bag isostatic pressing has strong applicability and is especially suitable for experimental research and small batch production. It can simultaneously press more than two different shapes of parts in one high-pressure cylinder and produce large and complex parts. The production process Short and low cost.
Dry bag method isostatic pressing, the pressurized rubber mold is put into the cylinder in advance, and dare not come out during work. After the powder is loaded into the forming rubber mold, it is put into the pressurized rubber mold together, or the powder is sent to the pressurized rubber mold through the feeding hopper from above. The forming rubber mold is not in contact with the liquid medium, so It is called the dry bag method. This method can realize continuous operation, open the upper cover, load the material from the hopper, then close the upper cover and press the molding. When the blank is out, the upper cover is opened, and the blank is ejected from the top through the ejector bar at the bottom. The dry bag method has a high degree of automation and a short operation cycle, and is suitable for mass production. However, the size and shape of the molded product are limited because the pressurized rubber mold is not easy to be replaced frequently.
