The geometry of a double-flighted screw and its nomenclature are presented in Fig. 1.4 using the classical description from Tadmor and Klein [4]. The nomencla- ture has been maintained to provide consistency with the classical literature and to provide some generality in the development of the symbols and equations that are used in extruder analysis.
Several of the screw geometric parameters are easily obtained by observation and measurement, including the number of flight starts, inside barrel diameter, channel depth, lead length, flight width, and flight clearance. The number of flight starts, p, for the geometry in Fig. 1.4 is two. The inner diameter of the bar- rel is represented by Db, and the local distance from the screw root to the barrel
The geometry of a double-flighted screw and its nomenclature are presented in Fig. 1.4 using the classical description from Tadmor and Klein [4]. The nomencla- ture has been maintained to provide consistency with the classical literature and to provide some generality in the development of the symbols and equations that are used in extruder analysis.Several of the screw geometric parameters are easily obtained by observation and measurement, including the number of flight starts, inside barrel diameter, channel depth, lead length, flight width, and flight clearance. The number of flight starts, p, for the geometry in Fig. 1.4 is two. The inner diameter of the bar- rel is represented by Db, and the local distance from the screw root to the barrel
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