I. Introduction
Additive manufacturing, also known as 3D printing, is one of the key technologies for the future of the manufacturing industry. Since the end of the 1990’s and the beginning of the 21st century, there has been a continuous demand for shorter lead times and cost reduction of manufactured products. Focusing on die & mold sector, it has been a traditionally innovative and strategic sector in the European economy. In fact, since the late 1990s, the tooling industry has been continuously implementing new solutions such as high-speed machining, 3D digitalization, and process simulation, to maintain the competitiveness in a global market. Moreover, tooling industry is considered strategic not only in Europe, but also in Japan or US among other countries, since most of the massive production lines use a set of tools for the manufacturing of large series of parts.