Uniroyal, A.g.

Hans G Menges

Engelbert G Harms

Rainer Hegele

Josef Peter Lehnen

A single-screw extruder and process for mixing viscous materials, for example, rubber mixtures and thermoplastic materials. The process and apparatus includes inserting a plurality of obstacles in the flow path of the material stream in the interior of the extruder cylinder. The obstacles are in the form of a number of series of studs protruding into the cylinder and accommodated by respective gaps or openings in the threads of the screw. The depth of penetration as well as the number of studs can be varied and adjusted by automatic means. The penetrating portion of the studs can be of different shapes according to the requirements for a thorough and turbulent deflection and mixing of the material stream.

Method and apparatus for mixing viscous materials

Single-screw extruder for mixing viscous materials by dividing material in only the forward flow direction in an irregular sequence into a plurality of communicating flow paths which are subjected to constant change between being divided and rejoined. Extruder design can be varied by removable and interchangeable partial arcuate screw sections which are affixed to the body of the screw in the space between selected threads of a continuous screw thread.

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Aachen, Germany

Hans G Menges