Real-time diagnosing polymer processing in injection molding using ultrasound

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DOIResolve DOI: http://doi.org/10.1002/app.36868
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TypeArticle
Journal titleJournal of Applied Polymer Science
ISSN0021-8995
Volume126
Issue6
Pages20592066; # of pages: 8
Subjectultrasound; real-time; injection molding; processing; polymer storage modulus
AbstractUltrasonic diagnosing technique with a new high-temperature ultrasonic transducer is developed to real-time diagnose polymer processing and its morphology changes in injection molding processing. Compared with the previous researches, the new technique can provide more and accurate information. In this study, ultrasound diagnosis shows that longitudinal wave can real-time characterize the data of the injection process and polymer morphology changes, including melt flow arrival time, the part ejection time, filling and packing stages, polymer solidification process, and the morphology changes during polymer crystallization. Shear waves can real-time diagnose Young's and shear storage modulus, anisotropy property of polymer in injection molding. During our research, real-time ultrasonic diagnosis shows that the storage modulus along the vertical direction is larger than that of the parallel to the melt flow direction under our setup injection conditions. Scanning electron microscopy and dynamic mechanical analysis measurements present that it is because the crystalline lamellas of HDPE are parallel arrangement and grow in a vertical to melt flow direction owing to injection shear force under a certain injection conditions.
Publication date
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NPARC number21268203
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Record identifierf42adf07-3100-4287-830a-cf11408b348d
Record created2013-06-03
Record modified2016-05-09
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