Method for producing a three-dimensional shaped object by means of layer-by-layer material application

Abstract

In a method for producing a three-dimensional mold and a three-dimensional shaped object () by means of layer-by-layer material application, geometry data for the shaped object (), a support part () having a base surface () for holding the three-dimensional shaped object (), and a first and a second material () that can be solidified are made available. In the solidified state, the second material () has a greater strength than the solidified first material (). The solidified first material () can dissolve in the solvent. To form a negative-shape layer (), material portions of the flowable first material () are applied to the base surface () and/or to a solidified material layer of the three-dimensional shaped object () situated on this surface, in accordance with the geometry data, in such a manner that the negative-shape layer () has at least one cavity () that has a negative shape of a material layer of the shaped object () to be produced. The negative-shape layer () is solidified. To form a shaped-object layer (), the cavity () is filled with the second material (), and afterward the second material () is solidified. Regions of the solidified negative-shape layer () and/or shaped-object layer () that project beyond a plane arranged at a predetermined distance from the base surface () are removed by means of machining material removal. The steps mentioned above are repeated at least once. The negative-shape layers () are brought into contact with the solvent in such a manner that the solidified first material () dissolves in a solvent.