Mechanical properties test and microstructure analysis of polyoxymethylene (POM) micro injection moulded standard parts

Guido Tosello, Giovanni Lucchetta, Hans Nørgaard Hansen, Alberto Gava, Sara Paliuri

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

Abstract

The tensile mechanical properties and the micro structure of micro injection moulded polyoxymethylene (POM) test parts were investigated in this paper. The effects of different injection moulding processing conditions on ultimate tensile stress and strain at break were analyzed. Additionally, the effects of miniaturization on the mechanical properties were investigated by executing injection moulding with both a standard tool designed according to ISO 527-2 and a miniaturized test part obtained from the standard design by a downscaling factor 10. The experiments have been performed according to factorial plans, in which the factors of interest were mould temperature, melt temperature and dimensional range of the specimen (i.e. macro and micro parts). Micro structure analysis was performed by means of plastography techniques and revealed that high mould and melt temperatures resulted on a thin skin layer and a larger spherulitic core, low value of ultimate tensile stress and high of elongation at break.
Original languageEnglish
Title of host publicationProceedings of the 5th International Conference on Multi-Material Micro Manufacture (4M/ICOMM 2009)
Publication date2009
Pages231-235
Publication statusPublished - 2009
EventInternational Conference on Multi-Material Micro-Manufacture(4M) and the International Conference on Micro-Manufacture (ICOMM) - Karlsruhe, Germany
Duration: 23 Sep 200925 Sep 2009
Conference number: 5th
http://www.4m-association.org/conference/2009

Conference

ConferenceInternational Conference on Multi-Material Micro-Manufacture(4M) and the International Conference on Micro-Manufacture (ICOMM)
Number5th
CountryGermany
CityKarlsruhe
Period23/09/200925/09/2009
Internet address

Keywords

  • Micro injection moulding
  • Design of Experiments
  • Mechanical properties

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