The thermoplastic foam injection moulding offers many advantages such as material savings, cycle time reduction and less warpage of plastic parts produced. To ensure the manufacturability of a part before design and production of the injection mould, filling simulations are often used. According to the current state of the art, however, the simulation of this special process is possible only with significant restrictions and simplifications. Therefore, the aim of an actual research project is to implement a new approach for the simulation of the foam injection moulding process. The dependency of specific volume (v), pressure (p) and temperature (T) is not yet known for this process. Unlike previous approaches which are based on a mathematical approach of the cell growth, here a novel approach is pursued, in which the pvT-behaviour and the rheological behavior of blowing agent loaded melts are measured directly on the injection moulding machine. Hereupon the measured data is transferred to a mathematical model to integrate the material behaviour into existing simulation software. Since existing laboratory instruments are not suitable for measuring blowing agent loaded melts, it is first necessary to provide such a system technology. This system technology is therefore responsible for loading the polymer with a blowing agent and keep it dissolved during the measurement. To determine the material behaviour for simulating the foam injection moulding process, the rheological and pvT-behaviour have to be known. Therefore appropriate injection moulds are to be designed and manufactured. Subsequent the rheological behaviour and the pvT-behaviour of blowing agent loaded melts are to be fully investigated in order to convert this into a material model. This model may then be implemented into an existing simulation software. Afterwards simulations with real-produced components are to be compared to each other for validation of previously determined material data.