Ultrasonic diagnosis of the single screw behavior during extrusion – a case study

Download
  1. (PDF, 2 MB)
  2. Get@NRC: Ultrasonic diagnosis of the single screw behavior during extrusion – a case study (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1002/pen.21246
AuthorSearch for: ; Search for:
TypeArticle
Journal titlePolymer Engineering and Science
Volume49
Issue2
Pages244250; # of pages: 7
AbstractUltrasonic diagnostic method of screw behavior during extrusion has been designed, developed, and carried out on a 63.5-mm single screw extruder, equipped with either a basic conveying screw or a mixing screw. It was found that the screw behavior depends on the screw speed and the die pressure. Whereas initially at low speed, the screw centered by the hydrodynamic forces rotates smoothly in the axial position, at higher screw speeds and high die pressures the screw starts vibrating. Thus, (1) the screw tip vibrated with the amplitude of 10–210 μm as the screw speed varied from 5 to 100 revolutions per minute; (2) the screw vibrations in the vertical and horizontal directions were asymmetrical; (3) the vibration pattern repeated itself at every two revolutions; (4) the vibrations originated in the poorly aligned engagement in the gearbox sleeve when the screw was pushed deeply into it by backpressure; (5) once pushed in the screw oscillated at any screw speed or die pressure.
Publication date
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedNo
NRC number50239
NPARC number12853537
Export citationExport as RIS
Report a correctionReport a correction
Record identifierf422a0d9-c8f1-49e2-a02b-f272a6d487d9
Record created2009-11-10
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)