eprintid: 609
rev_number: 13
eprint_status: archive
userid: 12
dir: disk0/00/00/06/09
datestamp: 2013-04-04 13:13:00
lastmod: 2015-05-29 20:13:52
status_changed: 2013-04-04 13:13:00
type: report
metadata_visibility: show
item_issues_count: 0
creators_name: Bradley, A.
creators_name: Cooker, M.J.
creators_name: Dellar, P.J.
creators_name: Fitt, A.D.
creators_name: Fowler, A.C.
creators_name: Keener, J.P.
creators_name: King, J.R.
creators_name: Lacey, A.A.
creators_name: Lee, W.T.
creators_name: Mitchell, S.L.
creators_name: Richardson, G.
creators_name: Vynnycky, M.
title: Foam formation in the plastics industry
ispublished: pub
subjects: materials
subjects: Fluids
studygroups: esgi82
companyname: Cork Plastics
full_text_status: public
abstract: The manufacture of polyvinyl (PVC) fascia boards involves the extrusion of a pressurized mixture of molten PVC and foaming agents through a die that is shaped in the exterior of a board; subsequent pressure release triggers foaming, so that the interior of the board is filled, simultaneously as the board is cooled. Sometimes, however, the foam does not fill the interior, leading to undesired voids, especially at corners. We consider a mathematical model for the foaming process that attempts to account for the formation of undesired voids. Preliminary model results suggest that severe temperature gradients through the cross-section are most likely responsible for void formation; two mechanisms are suggested.
date: 2011
citation:   Bradley, A. and Cooker, M.J. and Dellar, P.J. and Fitt, A.D. and Fowler, A.C. and Keener, J.P. and King, J.R. and Lacey, A.A. and Lee, W.T. and Mitchell, S.L. and Richardson, G. and Vynnycky, M.  (2011) Foam formation in the plastics industry.  [Study Group Report]     
document_url: http://miis.maths.ox.ac.uk/miis/609/1/CorkPlastics.pdf