Twin-screw extruder owning respective conical nose screw sections

          A  twin screw extruder which importantly cuts down on extruder wear through provision of separating, complementarities, inter fitted conical screw and barrel portions adjacent the outlet end of the extruder barrel which achieves an even, bearing-type support for the rotating screws as material passes through the apparatus. In preferred forms, the screws are intermeshed along the majority of the extruder barrel, but diverge at the section of the final conical screw sections and are accepted within respective complementary barrel sections; in this way the material which is processed is split into adjacency, non-communicating streams, and therefore equally flows around and supports the adjacent screw part to reduce the tendency of the screws to detach themselves and come into wearing contact with the surrounding barrel walls. The extruder can be utilized to deal with a great variety of plant-derived materials, but is especially benefical for viscous substances which can be difficult to handle with single screw extruders.