1. Geometric description

1.1 System classification

The first criterion used to define counter-rotating twin-screw extrusion systems concerns the level of interpenetration of the two screws. A screw is said to be interpenetrated when the threads of one screw penetrate the channel of the neighboring screw, and non-interpenetrated when they do not. Figure 1 illustrates these two situations.

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Geometric description

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page Counter-Rotating Twin-Screw Extrusion

Operating mode

Bibliography

(1) - JANSSEN (L.P.B.M. ) - Twin Screw Extrusion. - Elsevier, Amsterdam (1978).
(2) - MARTELLI (F.) - Twin Screw Extruders, a Basic Understanding. - Van Nostrand Reinhold, New York (1983).