Wet-bag Isostatic Pressing Technology
Isostatic pressing can be divided into dry and wet processes. Wet process powder into plastic bag, into the liquid medium, and liquid direct contact. Because the shape and size of plastic envelope can be arbitrarily changed according to the shape of the product, products of different shapes can be produced, and the dry method is mainly suitable for small-scale production of a single product, so the wet method is more widely used than the dry method of isostatic molding.
Isostatic molding is usually referred to as cold isostatic molding, is the use of fluid (water, oil) as a transfer medium to obtain uniform static pressure applied to the material. That is to use the incompressibility of the liquid medium to evenly transfer the pressure, from all directions for pressure, product forming method. According to its forming process, it can be divided into two forms: wet bag type and dry bag type. At present, the wet bag method is mainly used in large quantities.
Wet-bag isostatic pressure
Wet bag isostatic pressing technology is to put granulated ceramic powder or pre-formed billet into the deformable rubber envelope, and then apply uniform pressure through the liquid, when the pressing process is over, and then the rubber envelope with billet body out of the container, this is a discontinuous forming method.
The cost of this technology is relatively low, can form moderately complex parts, and the pressure can be up to 500MPa, suitable for small-scale production, but in a certain period of time the number of molding products is small, the size and shape of the billet is not accurately controlled, the production efficiency is not high, can not be continuous large-scale production.
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