The article provides a brief overview of the technological process of extrusion technology, its advantages and disadvantages. It describes a number of technical solutions to remove these disadvantages. The proposed solutions are protected by patents.

The article reviews the designs of extruders and screws. It describes the main known methods of determination of material quality. As a technical solution improving the design of extruder, a double-threaded screw that should be installed in the material forming zone is proposed.

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