Abstract: A method of mixing of plurality of compounds on a single screw extrusion machine comprises the steps of attaching a barrel of a dynamic mixer apparatus onto the down stream end of a barrel of the extrusion machine, arranging a support shaft in the dynamic mixer apparatus to rotatively carry a plurality of rotors and stators within the dynamic mixer barrel, machining at least one introduction port through the dynamic mixer barrel at a position radially adjacent a rotor and attaching a satellite extrusion mixer to the introduction port so that additives may be introduced at a desired location best suited for the additive. Additionally, the introduction port may used as a withdrawal port to take samples of the mix. Alternately, the rotor of the dynamic mixer may be positioned to present a shaft with a rotor of opposite hand to provide a flow retarding characteristic.

Abstract: The present invention comprises an extrusion arrangement for the controlled compounding and mixing of a plurality of time, pressure and condition sensitive substances in a single screw plastic extrusion machine, having a main support shaft connected to the downstream end of a single screw plastic extrusion machine, the support shaft enclosed within a barrel shaped housing, at least one stator and one rotor being disposed about the support shaft within the barrel shaped housing, and at least one satellite extrusion feeder arranged to supply an additive to the barrel shaped enclosure through an introduction port, the introduction port arranged at a location radially adjacent a rotor on its support shaft.