For a flexible and resource efficient generation of moulds for micro-injection moulding, additive manufacturing processes such as Selective Laser Melting are used. Electrochemical machining (ECM) is a promising technique for the final shaping of the mould and for creation of the injection cavity with required precision, since ECM is independent of material hardness and ductility [1]. The latter property is important concerning SLM produced moulds, which are often harder and stronger than cast moulds [2]. In this study, electrochemical machining of two SLM materials, A1Si10Mg Aluminium alloy and 18Ni-300 Nickel-based maraging tool steel, is analysed. A unique process applying a continuous electrolytic free jet (Jet-ECM) is used that offers the possibility to generate micro-structures by controlling the nozzle movement and the current flow [3].
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