Gear extruder for a caoutchouc mixture

Abstract

The invention relates to an extruder apparatus for the extrusion of caoutchouc mixtures and plastics, having a gear extruder consisting of a housing in which a pair of gears that mesh with one another, and two intake rollers, are housed, and there is also provided in the apparatus two intake channels and one extrusion channel. It is the task of the invention, by simple means, and in a simple manner, to improve material intake and to better fill the tooth spaces with the material to be extruded, and by doing so, to reduce inclusions of air that are brought along as well. The invention resides in the fact that one pushes in the material to be processed, as far as possible into the tooth spaces of the gears by means of the intake rollers, which are arranged at a point at which the teeth of the gears constitute, together with the inner wall of the housing, an intake slot, and in so doing, one expels, at least in part, the air that is situated in the tooth spaces. The extruder apparatus is distinguished by the fact that an intake roller is allotted directly to each gear and that the intake rollers are arranged in recesses of the housing at a point at which the teeth of the gears, together with the interior wall of the housing, constitute an intake slot. In this way, it is possible to fill the gear spaces to a more perfect degree with the material to be extruded, and to avoid, in large measure, the inclusion of air.