an extrusion apparatus including at least one conical stator , and at least one conical rotor . the rotor is adapted for defibering or orienting a plastic material . the apparatus has an opening for receiving an elongate product or mandrel . the product or mandrel may be disposed in the apparatus such that , with the product or mandrel received in the opening , an extrusion conduit is defined in the opening between the product or mandrel and the rotor and stator . the rotor and stator are disposed with respect to one another to form a supply opening wherein the plastic material flows between the stator and rotor and is pressed into the extrusion conduit . a method for extrusion is also described involving the apparatus ;