PROCESS FOR THE HOMOGENISATION OF FILLERS IN THE STEREOLITHOGRAPHIC PREPARATION OF THREE-DIMENSIONAL OBJECTS

摘要

A process for the stereolithographic preparation of a three-dimensional object, wherein the object is built in a container which contains a radiation-curable liquid formulation with fillers by a repeated alternatin g succession of process steps (a) and (b), wherein in step (a) a layer of the radiation-curable liquid formulation, one limitation of which i s the surface of the formulation, is cured using suitable radiation within a surface area which corresponds to the desired cross section of the three-dimensional object to be formed at the level of this layer, and wherein in step (b) a new layer of the radiation-curable liquid formulation is formed on said cured layer, which process comprises homogenising the radiation-curable liquid formulation during said process continuously or discontinuously to such an extent that there is no noticeable change in the filler content of the radiation-curable liquid formulation in the area of that layer with which the cured layer is coated in step (b). This process enables the skilled person, inter alia, to choose his fillers solely according to the purpose envisaged therefor without having to fear technical problems or problems relating to the qualit y of the sterolithographically produced object resulting from the sedimentation of the fillers during the preparation of the object.