An Investigation Of Computer Modelling ForMicro-injection Moulding

Abstract

Industrial interest in micro-fabrication techniques has mushroomed in the wake of recent advances in microtechnology, notably LIGA technology which provides a cheap and effective route to the mass fabrication of complex microstructures. At the heart of LIGA technology is the injection moulding process. This paper investigates current state-of-the-art injection moulding simulation software for use as design tools in the development of micro-parts. We have investigated the flow of poly(oxymethylene) in 400 um wide channels of rectangular cross-section (depth 40-500 uin) and under a range of injection pressures. The flow lengths obtained were found to be in good agreement with computed values. Simulation results are also presented concerning the filling of components for a micro-pump.