The HPX plastication system developed by Krauss-Maffei increases the plastication rate without altering the screw length, screw speed and installed drive power Injection moulding machines can therefore be easily retooled. The system comprises a multi-flight barrier screw and a plastication system with a feed zone that is grooved in the axial direction. The improved melting behaviour increases the specific screw throughput This leads to shorter cycle times and increased productivity particularly, in high-speed applications.