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The effect of axial pressure gradient on extruder mixing characteristics
Author(s) -
Bigio David,
Erwin Lewis
Publication year - 1992
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760321108
Subject(s) - plastics extrusion , mixing (physics) , materials science , drag , mechanics , distributive property , flow (mathematics) , volumetric flow rate , pressure gradient , composite material , mathematics , physics , quantum mechanics , pure mathematics
Many twin screw extruders are operated in the starve‐fed mode with the majority of the extruder having partially‐filled channels. There will always be regions of totally filled channels due to the presence of the die or reverse elements. The authors experimentally show the effect of the change of percent drag flow on the rate of distributive mixing in the co‐rotating and counter‐rotating twin screw extruder. Optimum operating conditions for distributive mixing are identified experimentally and verified theoretically.