Abstract: A theoretical calculation of the process of processing feed by creating a hydraulic shutter using the physical and mechanical properties of the material (the angle of pinching the material) is carried out. Theoretical problems of the fundamentals of material deformation are considered. A scheme is proposed for calculating the acting forces when creating a hydraulic shutter. In this case, the structural changes of the extruder screw are achieved by making the bevel angle of the screw extruder surface (View A). Theoretical analysis of the dependence of the torque on the viscosity of the feed, on the angle of the slope of the surface of the screw, analysis of the dependence of the power and capacity of the extruder on the speed of the screw and on the angle of the slope of the screw surface, on the viscosity of the feed.