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Dynamic behavior of a single screw plasticating extruder part I: Experimental study
Author(s) -
Nelson R. W.,
Chan D.,
Yang B.,
Lee L. James
Publication year - 1986
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.760260206
Subject(s) - plastics extrusion , die swell , materials science , extrusion , rheometer , composite material , barrel (horology) , capillary action , rotational speed , transient (computer programming) , die (integrated circuit) , back pressure , flow (mathematics) , rheology , mechanical engineering , mechanics , computer science , engineering , nanotechnology , physics , operating system
The dynamic responses of a 2–1/2 inch single screw plasticating extruder and extrusion line were investigated. Step changes in screw speed, take‐up speed, back pressure, and processing materials were used to determine the transient responses of barrel pressures, die pressure, melt temperature, and extrudate thickness. Dynamic responses of the entire extrusion line can be explained by the flow mechanism of the extruder and the logical properties of the polymer used. A capillary rheometer was also used to determine if it could simulate pressure responses in the extruder for screw speed changes. Results showed that capillary rheometer was helpful in estimating the short term pressure responses in the die.