Performance of sub-micron diamond films coated on mould inserts for plastic injection moulding
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In this article, results obtained from an investigation focusing on the application of diamond coatings on inserts for thermoplastic injection moulding applications are reported. The injection moulding industry can potentially benefit significantly from the use of diamond coatings on moulds typically employed in the injection moulding systems. Diamond films were coated on steel and onto silicon inserts and subsequently tested in real operating conditions. The moulded objects were analysed and the results were compared between bare steel and silicon inserts. The as-grown diamond coatings were characterised prior to and post the routine injection cycles using a number of techniques, such as Raman spectroscopy and SEM. Furthermore, the polymer finishing quality was assessed by optical microscopy for each material and coating used, and the results are presented and discussed in this article.
KeywordsResidual Stress HDPE Diamond Film Injection Moulding Mould Insert
V. F. Neto thanks the Universidade de Aveiro for the PhD funding support. The authors are grateful to FCT, Portugal, for funding the project: POCTI/EME/60816/2004. The authors would like to acknowledge Eng. Gil Costa, from F. Ramada (Ovar, Portugal), for supplying the Impax SupremeTM steel, Eng. Luis Godinho and Eng. Rui Pimenta, from Prirev (Vagos, Portugal), for producing the CrN interlayers and also Eng.a Tatiana Zhiltsova for the helpful collaboration operating the injection moulding machine.
- 2.Shaharuddin SIS, Salit MS, Zainudin ES (2006) Turkish J Eng Env Sci 30:23Google Scholar
- 5.Neto VF, Shokuhfar T, Oliveira MSA, Grácio J, Ali N (2006) Int J Nanomanuf (Accepted for publication on 1st November)Google Scholar
- 7.Neto VF (2004) Investigation on the film properties of advanced diamond coatings deposited using time-modulated CVD, Master Dissertation, University of Aveiro, JuneGoogle Scholar