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Modular tangential counter‐rotating twin screw extrusion: Determination of screw pumping characteristics of modules and composite machine behavior
Author(s) -
Bang DaeSuk,
Hong MyungHyuk,
White James L.
Publication year - 1998
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.10211
Subject(s) - materials science , extrusion , plastics extrusion , modular design , composite number , flow (mathematics) , mechanical engineering , screw pump , composite material , mechanics , engineering drawing , computer science , engineering , physics , operating system
Extensive experimental studies of a starved flow modular tangential screw extruder are described. Die pressures and fill factor profiles along the screw axis are measured and used to determine screw characteristic curves Q vs. Δ P / L for individual screw elements of varying designs in a Leistritz twin screw extruder. Superior pumping characteristics of matched as opposed to staggered elements is found. The experimental screw characteristic curves are compared with the results of mathematical simulations of the flow. Agreement is generally good.