The injection moulding of micro-components requires the plastification of minimum amounts of polymer material and its subsequent high-precision injection into the mould cavity. This usually pushes both screw-plunger injection and screw plastification to their limits. Therefore, alternative plastificartion and injection concepts can be very useful for micro injection moulding. As part of a machine study, the Kunststoff-Zentrum of Leipzig/Germany (KuZ) developed a prototype which operates both as a single-stage plunger injection moulding machine and as a plunger injection moulding machine with plunger pre-plastification.