Mixing flight

Figure 8.21 Schematic for Maddock-style mixers a) a mixer with the flutes aligned in the axial direction, and b) a cross-sectional view perpendicular to the screw axis showing the clearance for the mixing flight (courtesy of Jeff A. Myers of Robert Barr, Inc.)...

Maddock-styie mixer 25.2 2 0.51 mm undercut on the mixing flight... 

Fig. 7.28 Cut-away view of a batch rotary blender with internal mixing flights (courtesy Munson Machinery Co., Utica, NY, USA).

For a Maddock mixer with the flutes parallel to the axis of the screw, molten polymer flows into the in-flow flutes via a pressure gradient, and then either continues to flow downstream in the flute or is passed through a small clearance between the mixing flight and the barrel wall. 

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