During this year's Barbara Conference at Fraunhofer IGCV in Garching, host Prof. Dr.-Ing. Wolfram Volk TUM and Prof. Dr.-Ing. Lothar Kallien of Aalen University met for a scientific exchange and presented their current joint project.
The use of lost cores in die casting is accompanied by difficulties due to the high filling speeds. Cast salt cores produced at Aalen University withstand the stresses but negate the economic advantage of the die casting process. At the utg chair, the first composite cores made of two different sand-binder mixtures were produced on the core shooter, which withstood initial tests in die casting at Aalen.
The aim of the project is to develop new composite cores, to simulate the die casting process at utg and to compare them with experimental data. To determine the core loads, a die-casting tool is equipped with sensors and an armoured glass pane in Aalen, with which the filling process, which takes place in the millisecond range, and the thermomechanical load on the composite cores can be observed in real time.
The test components made with sand cores are examined non-destructively with 3D computed tomography. With the porosity analysis, defects in the castings and sand cores as well as the dimensional deviations can be quantified and classified.
We will keep you up to date and inform you as soon as there are new insights.
