doi: 10.3850/978-981-11-0749-8_728
Effects of Different Mould Coatings on Polymer Filling Flow in Thin-Wall Injection Moulding
M. Sorgato, D. Masato and G. Lucchetta
Department of Industrial Engineering, University of Padova, via Venezia 1, 35131 Padova, Italy
Abstract
Injection moulding of parts having high flow length/thickness ratio is a challenging task for both micro and packaging applications. In the filling phase, high-speed injection can cause a raise of cavity pressure, which prevents the complete replication of the mould geometry. Therefore, in this paper, the effects of three mould coatings, such as aluminium oxide, diamond-like carbon and silicon oxide, were investigated. In particular, the filling of a representative micro-part was studied as a function of mould coating, injected polymer and different process parameters, in order to identify the effects of heat conduction and wall slip related to the coatings.
Keywords: Coating, Mould, Micro injection moulding.
