Scaling up Three Dimensional Printing

New processes and machines are proposed in academia and on the market, down to the microscopic range. On a different side, manufacturing complex parts of large size by additive processes has still unexplored potential. This paper describes the patented 3DPrinting D-Shape technology, one of the few available to build parts up to 3 tons. Three sands have been tested, calcareous dolomite, granite and pozzolana (regolith-like) with pulverized MgO, under the action of an aqueous MgCl2 binder, focusing on the optimization of the inkjet parameters.