ON THE INFLUENCE OF THERMAL EFFECT ON PERFORMANCE EXTRUDER WITH VACUUM CHAMBER

Abstract

The study of the reaction capillary-porous extrudates on the environment with reduced air pressure showed that one of the effective ways to control the formation of porous structure of extrudates is thermal vacuum exposure of the extruded raw material after its exit from the die of the matrix of the extruder. This influence on the extrudate can be implemented in the extruder, which is optionally equipped with a vacuum chamber. Extrusion of raw materials of plant origin is technologically energy-intensive processes, so we can assume that the analytical evaluation of the degree of influence of the thermal effect during operation of the extruder with a vacuum chamber in his performance refers to the actual tasks. It is shown that currently known analytical expressions to determine the performance of the extruder, usually do not consider the factors of reduced pressure at the exit of the extrudate from the die of the matrix machine. The equation that relates the productivity of press-extruder, with the pressure of the extruded raw material within the working path of the machine and at the exit to the atmosphere, is not adequate to assess change in performance of the extruder in the case of an optional vacuum chamber. Therefore, for approximate calculations, if necessary, you can use a well-known expression, but taking into account the factor of the explosion.