When it comes to dry die, it has to be said that the dry press molding process is a method of molding metal powder and ceramic powder, so the dry die is easy to use.
It is only necessary to fill the dry powder blank into the cavity of the dry stamper.
A certain pressure is applied to make the dry powder blank a dense body.
In addition to the dry powder blank, a certain amount of surfactant, lubricant, binder, etc. are used in the use of the dry stamper. Among them, the surfactant can be used to change the surface properties of the powder, thereby reducing the agglomeration effect of the ultrafine powder and making it evenly distributed.
After the addition of the lubricant, the friction between the particles and the surface of the particles and the dry stamper can be reduced; the purpose of adding the binder is to enhance the bond strength of the powder. In addition, the blank is formed by a press or a special dry press, as well as a certain pressure and pressing method.
The performance of the obtained dry-pressed green body is affected by many factors. In addition to the quality of the dry pressed mold, it also relates to the properties of the powder, including particle size, particle size distribution, shape, water content, additive characteristics and use effect, during the pressing process. Pressure, pressurization method, and pressurization speed.
Compared with other molding methods, dry press molding not only has high production efficiency, low labor, low scrap rate, short production cycle, and the products produced also have the advantages of high density and high strength, so this method is very suitable for large batch industrial production.
However, at present, the cost of dry stamping molds is relatively high, which also greatly limits the popularity of dry press forming technology. More applications are in the field of ceramic production, using dry pressing methods and dry pressing molds to manufacture ceramic tiles and wear-resistant porcelain. Lined with ceramic sheets, seal rings and other products.