Two-stage Extruder

A two-stage extruder has a first, vertical stage and a second, separately driven, horizontal stage. The two stages are off-set from one another and lie at tangents to one another in the region of a connecting passage. The first stage has a rotatable single screw extruder with kneading blades off-set from one another and is located between conveying screw components of said member. A bearing is provided for the member at its upper end and a cylindrical sleeve surrounding the lower end of the member. It can be turned to control the effective size of the connecting passage or to eject material through a second outlet. A two-stage extruder features low consumption, high quality and output.