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Dry powder pressing mold manufacturing process and process

Jul 25, 2018

The appearance of the dry powder pressing mold is because the pressing process of the dry powder cannot be achieved by the ordinary process, so the finished product of the dry powder is obtained by the special process of dry powder pressing.


The dry powder pressing mold is a mold which is generally subjected to dry pressing molding in the manufacturing process, that is, the dry powder blank is filled into the metal mold cavity, and a certain pressure is applied to make it into a dense green body, thereby obtaining a mold. A finished product. Moreover, it is suitable for metal and ceramic materials, and can be said to be a molding method of metal powder and ceramic powder.


The specific manufacturing process of dry powder pressing mold:

First, a certain amount of surfactant is added to change the surface properties of the powder, and to change the surface adsorption properties and particle shape of the particles in the powder, thereby reducing or avoiding the occurrence of the agglomeration effect of the ultrafine powder, so that it can be evenly distributed. In addition, a quantity of lubricant can be added to reduce the friction between the particles and the surface of the mold, and an appropriate amount of binder is added to enhance the bonding strength of the powder. When the powder or powder is subjected to the above-mentioned treatment, it is loaded into a mold and pressed into a dense body by a pressure or some pressing method by a press or a dedicated dry press molding machine.


In the dry powder pressing mold, the pressing type includes single-phase pressing, two-way pressing, and four-direction pressing, and the two-way pressing can be further divided into two-way simultaneous pressing and two-way separate pressing. In its improvement, there are two types of vibration suppression and magnetic field compression, but these two compressions are suitable for use on metal powders.


Dry powder pressing mold This kind of mold has some related factors: powder properties, mainly including powder particle size, particle size distribution, shape and water content. In addition, there are additive characteristics and effects of additives, pressure during pressing, pressurization, and pressurization. They all have a great influence on the mold and cannot be ignored.