Explanation

When the powder is filled with the specified container under the specified conditions, the mass of powder per unit volume, that is, the density of loose powder without any force other than gravity, is equal to the mass of powder divided by the total amount of powder. The unit is g/cm3. The apparent density is the density of powder naturally stacked, which is one of the technological properties of powder. It depends on the adhesion between particles, the resistance of the rod to sliding, and the degree to which the voids of powder body are filled by small particles. The measurement methods of apparent density include funnel method, Scott capacity calculation method and vibrating funnel method. In the pressing process of powder, the capacity loading method is often used, that is, the density and single mass of the pressed parts are controlled by the amount of powder filled with a certain volume of the cavity, which requires that the powder filled with the cavity each time has a strictly constant quality. However, the volume of different powder must be different in quality, so it is stipulated that apparent density can be used to describe this volume property of powder.

Classification