Investigation of air entrapment and weld line defects in micro injection moulded thermoplastic elastomer micro rings

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The micro injection moulding (μIM) process for the production of micro rings in thermoplastic elastomers (TPE) was investigated and optimized. The objective was to minimize the formation of air entrapments and the depth of micro weld line created on the surface of the TPE micro moulded rings. The defects were investigated by both experiments and numerical simulations of the μIM process. The results obtained from the simulation software were verified by comparison with the actual moulded parts. It was found that the simulation was accurate in the prediction of air entrapments and weld line placement. The μIM processing parameters had a large influence on the weld line depth and the air entrapment. In particular, it was found that low settings of the injection speed and of the clamping force increased the air evacuation from the cavity, thus minimizing the weld line depth and the presence of air entrapment defects.
Original languageEnglish
Title of host publicationProceedings of the 4M/ICOMM2015 Conference
EditorsMassimiliano Annoni, Irene Fassi, Gloria J. Wiens, Stefan Dimov
PublisherResearch Publishing Services
Publication date2015
Pages266-267
Article number065
ISBN (Electronic)978-981-09-4609-8
Publication statusPublished - 2015
Event4M/ICOMM2015 Conference - Milan, Italy
Duration: 31 Mar 20152 Apr 2015
http://www.4m-association.org/conference/2015

Conference

Conference4M/ICOMM2015 Conference
CountryItaly
CityMilan
Period31/03/201502/04/2015
Internet address

Keywords

  • Nano moulding
  • Nano metrology
  • Micro and nano tooling

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