Аннотация
The extrusion of the raw material mass makes it possible to obtain full-fledged feed mixtures balanced in nutrients and useful substances, having a long shelf life (more than six months) without reducing the basic qualities. For the most efficient production of animal products, rational use of feed is necessary, which includes methods to increase their biological and nutritional value. The balance of the extruded feed and its high nutritional value provide a significant increase in the productivity of farm animals and poultry. The desire to increase the productivity of a single-screw extruder, the efficiency of preparing a feed mixture, and reducing the cost of producing a feed mixture is an urgent task that depends on the design parameters of the extruder, in particular on the design of the working body - the auger. (Research purpose) To reduce the leakage of material between the inner surface of the extruder housing and the edge of the screw screw of the extruder during the extrusion of feed. The estimated indicator "specific productivity" is proposed, its application makes it possible to objectively determine the efficiency of the extruder and establish a relationship between productivity and power costs for the extrusion process. (Conclusions) A screw design has been developed where the edge of the extruder screw adjacent to the housing is made grooved, which will reduce the energy intensity of the process and increase the extrusion productivity.