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Die geometrical effect on annular die swelling
Author(s) -
Seo Yongsok,
Wissler Eugene H.
Publication year - 1989
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1989.070370501
Subject(s) - die (integrated circuit) , die swell , shearing (physics) , composite material , materials science , swelling , limiting , finite element method , geometry , mathematics , structural engineering , engineering , mechanical engineering , extrusion , nanotechnology
Die geometrical effect on Newtonian annular jet swelling was studied using a finite element method. Numerical result shows what we expected in the limiting cases of die swelling with annular die geometries, i.e., variation of the die gap for straight dies follows the limiting behavior of capillary and planar die swellings. Also the effect of upstream die geometry was investigated. The result shows that final extrudate dimensions are generally influenced by its previous history in the die, i.e., not only by shearing action but also by elongational effect caused by narrowing die gap.