OUTPUT
If we suppose that the material within the channels "slips" oil the
b;irrel surface, a fact that would stop extrusion in any single-screw
extruder. obviously tile material that fills each channel remains mo-
tioniess within it (in relation to it) and rotates with the screws.' In
twin-screw extrudurs with conjugated profiles, once the material
rotating with the screws reaches the intermcshing area, it can no
longer rotate with them because, since the profiles are conjugated,
the flights of one screw completely fill tile channels of the other