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Multidimensional control of profile extrusion
Author(s) -
Stevenson James F.,
Lee L. James,
Griffith Richard M.
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.760260308
Subject(s) - die swell , extrusion , plastics extrusion , materials science , swell , die (integrated circuit) , point (geometry) , mechanics , composite material , mechanical engineering , mathematics , geometry , thermodynamics , engineering , nanotechnology , physics
Dimensional changes in complex profile extrusions are classified as overall size and local shape changes which can be related naturally and systematically to changes in operating conditions. The theoretical basis and supporting experimental data for simultaneous, independent control of certain classes of extrudate dimensions are presented for the following strategies: (1) size control by manipulating line speed relative to extruder output rate, (2) shape control by manipulating extrudate swell through adjustments in stock temperature, and (3) shape control by manipulating local die flow by adjusting the die temperature set point.