Research in the field of high pressure die-casting at the Foundry Institute in Aachen is carried out on two machines both based on the horizontal cold-chamber technologie. One is a Bühler H-630 SC and the other one is a Frech DAK 450 Vacural machine.
The automated Bühler H-630 SC (Shot Control) cold-chamber pressure die-casting unit has a maximum locking force of approximately 700t. The machine’s real-time controller permits the parameters of the pouring curve to be precisely followed. To do this, the speed, the back-pressure of the metal on the injection plunger and the displacement of the casting plunger are monitored. The equipment possesses a state-of-the-art ladle dosing unit and a robotic spraying unit from the company Wollin equipped with a highly flexible matrix-sprayhead. A Fondarex vacuum system facilitates vacuum supported high pressure casting. The Frech DAK 450 Vacural has a maximum locking force of 500t. With its various equipment options the machine shows a highly modular setup and can be used for various experimental setups. Three furnaces build by Meltec can be used with this machine, one build for the use of aluminium, one for magnesium and a third furnaces for the Vacural process. In addition to that a Arburg unit has been added in order to be able to manufacture both thermos- and duroplast plastics. A variothermal temperature control unit build by Single was added in order to support the manufacturing of plastic components.
Current research activities in the field of high pressure die-casting concentrate on Al and Mg alloys, composite materials and composite components, as well as on the thermal control of high pressure die-casting dies.