Slurry-based 3-D-printing of casting cores

Additive Manufacturing (AM) allows for the production of complex casting cores e.g. made from sand. Especially the Binder Jetting technique enables a production in an efficient way. However, the part produced generally exhibits a high surface roughness and limited mechanical strength. Slurry-based AM, however, offers the potential for producing mechanically stable, complex and filigree casting cores with a low surface roughness for the investment casting of complex hollow shapes such as e.g. cooling channels.