In these years, the metal foam technology has been developed for a huge trend, therefore it is believed that the metal foam material will be next tremendous need in the market. Thanks to their peculiar properties (e.g. lightweight, energy absorbing ability) metal foams can be of interest in the realization of cars component and their use in substitution of hollow parts can be hypothesized to produce innovative functional metallic parts. In this thesis, the Al foam and their use are focused in the casting process, as permanent functional cores. The topic is poorly explored in the scientific literature and in technological applications but can have important advantages such as weight reduction in comparison to dense components, the possibility to obtain «cavities» in casting objects, as well as impact energy, vibration absorption and acoustic insulation.