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RESEARCH PAPERS

Pressures and Flow Rates in Extruders With Axially Variable Geometry

[+] Author and Article Information
G. Tangorra

Rubber Laboratories, Pirelli S.p.A., Milano-Bicocca, Italy

J. Appl. Mech 32(2), 277-284 (Jun 01, 1965) (8 pages) doi:10.1115/1.3625796 History: Received June 06, 1962; Revised August 20, 1964; Online September 15, 2011

Abstract

The problem of predicting pressures and flow rates for extruders with geometrical parameters arbitrarily variable along the axis is considered for isothermal, Newtonian conditions. A graphical method is applied to an actual case of a truncated, cone-shaped extruder. Experimental results are reported. The same general procedure, but with further simplified formulas, is applied subsequently to cases of extruders having diameter, pitch, and thread depth linearly variable along the axis.

Copyright © 1965 by ASME
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