Development of Model of Polymer Melt Movement in Extruder

The analysis of current approaches to the extrusion process intensification was performed. A model of the polymer melt movement in the metering zone of a single screw extruder, which suggests that the melt moves in the form of a "slug" was developed. The equations for calculating the metering zone, considering the near-wall viscosity (adhesion) of the melt to the surface of the screw and the cylinder, taking into account the total rheological curve of the melt flow were proposed. A comparative analysis with the classical extrusion equation of the Newtonian fluid was carried out. Identity conditions of models (shear and slug) for the slot channel were calculated. The advantages of the model of "slug" flow - a more general nature, the simplicity of perception, consideration of new process parameters were shown.Increased melt friction on the extruder cylinder walls while reducing the friction on the screw allows to improve the performance of the metering zone of the extruder by 2.2 times