Dry-bag Isostatic Pressing Mold and Wet-bag Isostatic Pressing Mold for Ceramic
Dry-bag Isostatic Pressing Mold and Wet-bag Isostatic Pressing Mold for Ceramic
Principle of isostatic pressing of ceramics Isostatic pressing is also called hydrostatic pressing. It is a molding method that utilizes the incompressibility and uniform transmission of pressure of the liquid medium, that is, the pressure on the sample in the high-pressure container is the same as that in the still water at the same depth, so it is called hydrostatic pressure or Isostatic pressing. The molding process obtained according to this principle is called hydrostatic pressing, or 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 (i.e., the bag) first, and then place it in a high-pressure cylinder for pressing after sealing. During pressing, the sheath is completely immersed in the liquid and is in direct contact with the pressure transmission medium. Wet bag isostatic pressing has strong applicability, especially suitable for experimental research and small batch production, and can simultaneously press two or more different shapes of parts in one high-pressure cylinder and produce large and complex shaped parts. The production process Short and cheap.
Dry bag isostatic pressing molding, 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, they are 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 Called the dry bag method. This method can realize continuous operation, open the upper cover, charge from the hopper, then cover the upper cover, and pressurize and form. When the blank is released, the upper cover is opened, and the blank is ejected from the top through the top rod 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, because the pressurized rubber mold is not easy to be replaced frequently, the size and shape of the formed product are limited.
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