Flight width

D Molecular diffusivity D, Diameter of screw Db Diameter of barrel E Eddy difiusivity e Flight width in a twin-screw extruder... 

The iead iength was 124 mm for the main flight of the barrier section and 88.9 mm for all other sections of the screw. The main flight width and clearance were 9 and 0.09 mm, respectively, in all sections of the screw. The first 2.5 diameters of the screw were inside a water-cooled feed casing. The compression ratio was 2.7 and the compression rate was 0.0050. The specific rotational rate was calculated at 2.51 kg/(h-rpm). ... 

Lead iength, flight width, and flight ciearance were 76.2, 6, and 0.06 mm, respectiveiy, for aii sections of the screw. The first 2.5 diameters of the screw were inside a water-cooied feed casing. 

Flight width and flight clearance were 13.5 and 0.12 mm, respectively, in all sections of the screw. The extruder had a smooth-bore feed section. Three rings of pin mixers were evenly positioned in the middle portion of the metering section of the screw. All pins in a single ring had the same axial position as the type shown by Fig. 8.25. The specific rotational flow rate for the metering section was calculated at 5.0 kg/(h rpm). The compression ratio was 2.7. 

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