Process Factors Influence on Cavity Pressure Behavior in Microinjection Moulding

CA Griffiths, Stefan Dimov, S Scholz, H Hirshy, G Tosello

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Process monitoring of microinjection moulding (mu IM) is of crucial importance when analysing the effect of different parameter settings on the process and then in assessing its quality. Quality factors related to cavity pressure can provide valuable information about the process dynamics and also about the filling behavior of different polymer melts. In this paper, a pressure sensor mounted inside a tool cavity was employed to analyse maximum cavity pressure, pressure increase rate during filling and pressure work. The influence of four mu IM parameters, melt temperature, mould temperature, injection speed, and packing pressure on these three pressure-related process parameters was investigated. A design of experiment study was conducted by moulding a test part, a microfluidic component, in three different polymer materials, PP, ABS, and PC. The results show a similar process behavior for all three polymers, in particular a higher injection speed led to a reduction of the pressure work while a lower mould temperature reduces the pressure rate.
Original languageEnglish
Article number031007
Number of pages10
JournalJournal of Manufacturing Science and Engineering
Issue number3
Publication statusPublished - 9 Jun 2011


  • microinjection moulding
  • process monitoring
  • cavity injection pressure


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