Thermal model for curing implantable silicone in the moulding process applied to tracheal stents
dc.contributor.author
dc.date.accessioned
2015-03-24T12:25:24Z
dc.date.available
2015-03-24T12:25:24Z
dc.date.issued
2015
dc.identifier.issn
1359-4311
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dc.description.abstract
Tracheal stents are a kind of endoprosthesis used to prevent tracheal obstruction due to different illnesses or disorders. Stent design has to fulfil several requirements such as the prevention of migration, easy removal if needed and radiopacity allowance. Although some commercial solutions can be found on the market, there is a constant demand for new designs in order to obtain more anatomical geometries and customized solutions. This study shows a numerical model developed to predict appropriate manufacturing of tracheal stents with implantable silicone by using a moulding process. In this study, tracheal stents have been manufactured using two manufacturing processes, namely heating plate and furnace systems. Both manufacturing processes yield equivalent mechanical properties but with a longer process time for the heating plate manufacturing system. Thermal images captured by a thermo-graphic camera during the heating process using an open plate system were compared with the numerical simulations for the equivalent process revealing inconsistencies in the thermal stabilization time. This inconsistent result could be related with FE modelling as non-acceptable element geometries (distortions and sizing), non-realistic input experiment parameters and/or standard parameters used by the FE software. Elimination by simulation trials showed the reason for this disparity as being a result of inappropriate thermal conductance between all the solid surfaces in contact with the model due to the use of the FE software standard set for conductance, which proved to be critical in this case. Corrections in thermal conductance were performed and the new FE numerical model applied in furnace system conditions was tested showing an experimentally coherent curing time of the silicone stents. The final results lead to a heating system that can produce flexible and customized products with a good prediction of the curing process
dc.description.sponsorship
The authors gratefully appreciate the financial support from the Spanish Government (project DPI2009-09852). The research leading to the results has received funding from the European Union Seventh Framework Programme (FP7-PEOPLE-2009) under the grant agreement IRSES no 247476
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
info:eu-repo/grantAgreement/MICINN//DPI2009-09852/ES/Caracterizacion De Tecnologias Innovadoras Para La Planificacion Detallada De Procesos/
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Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.applthermaleng.2014.10.053
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© Applied Thermal Engineering, 2015, vol. 75, p. 1001-1010
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Articles publicats (D-EMCI)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Thermal model for curing implantable silicone in the moulding process applied to tracheal stents
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.relation.projectID
info:eu-repo/grantAgreement/EC/FP7/247476/EU/INTERNATIONAL RESEARCH EXCHANGE FOR BIOMEDICAL DEVICES DESIGN AND PROTOTYPING/IREBID
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.contributor.funder
dc.relation.FundingProgramme
dc.relation.ProjectAcronym