The simplest, most reliable and sufficiently accurate method of dosing bulk products is batch dosing by volume using measuring containers. The article considers a mathematical model of a volumetric dispenser. The combination of several methods of regulating the supply of bulk materials during batch dosing is ensured by building an accurate model of the drum dispenser.

Keywords: mathematical model of a drum dispenser, dosing process, friction, dynamic coefficient of friction, static coefficient of friction, bulk material

The article presents a description of the device for determining the physicomechanical characteristics of bulk materials - coefficients of external and internal friction. In DSTU, a device for determining the friction characteristics of bulk materials was designed and manufactured. A method for determining the coefficients of static and dynamic friction is presented. The proposed device allows to obtain more accurate information about the frictional characteristics of one or different bulk materials in static and dynamic conditions.

Keywords: Friction, dynamic coefficient of friction, static coefficient of friction, bulk material