Show simple item record

dc.contributor.authorWhiteside, Benjamin R.*
dc.contributor.authorBrown, Elaine C.*
dc.contributor.authorOno, Y.*
dc.contributor.authorJen, C.K.*
dc.contributor.authorCoates, Philip D.*
dc.date.accessioned2009-11-03T09:00:36Z
dc.date.available2009-11-03T09:00:36Z
dc.date.issued2005
dc.identifier.citationWhiteside, B.R., Brown, E.C., Ono, Y., Jen, C.K. and Coates, P.D. (2005). Real-time ultrasonic diagnosis of polymer degradation and filling incompleteness in micromoulding. Plastics Rubber and Composites. Vol. 34, No. 9, pp. 387-392.en
dc.identifier.urihttp://hdl.handle.net/10454/3824
dc.descriptionNoen
dc.description.abstractInjection moulding techniques have been miniaturised and refined to achieve micromoulding which aims to satisfy the need for mass production of low-cost micro- and nanoscale components. However, the microscale mould cavity features and extreme processing conditions which are inherent in the process can result in larger process variations than conventional injection moulding, with a corresponding increase in the probability of producing an unsatisfactory product. Accurate process diagnosis is required to ensure process reliability but integration of sensors onto the small and highly detailed mould units can be problematic and alternatives may need to be sought. Piezoelectric film ultrasonic transducers were integrated onto the extrusion barrel and mould insert of a micromoulding machine for real-time, non-destructive and non-intrusive process diagnosis with an ultrasonic pulse-echo technique. Polymer degradation owing to excessive heating at the extrusion barrel was successfully probed by measuring the ultrasonic velocities in the polymer at the mould insert. Filling incompleteness of the mould cavity was also sensitively detected by monitoring the ultrasonic energy variation transmitted into the part at different points along the melt flow length. The developed ultrasonic sensors and technique enable optimisation and in-process quality assurance of the moulded parts which ensures that maximum process efficiency can be achieved.en
dc.language.isoenen
dc.relation.isreferencedbyhttp://dx.doi.org/10.1179/174328905X71977en
dc.subjectExperimental studyen
dc.subjectThermooxidative degradationen
dc.subjectFlow velocityen
dc.subjectUltrasonic methoden
dc.subjectProcess controlen
dc.subjectMold fillingen
dc.subjectQuality assuranceen
dc.subjectOptimizationen
dc.subjectPiezoelectric sensoren
dc.subjectInjection moldingen
dc.subjectPolyoxymethyleneen
dc.subjectMonitoringen
dc.titleReal-time ultrasonic diagnosis of polymer degradation and filling incompleteness in micromoulding.en
dc.status.refereedYesen
dc.typeArticleen
dc.type.versionNo full-text available in the repositoryen


This item appears in the following Collection(s)

Show simple item record