A combination of building material (BM) and bath liquid useful for direct printing of visual aid models or components, especially for office or home use

摘要

A combination of building material (BM) and bath liquid for a process of direct printing (sic) of building components (BC) and models. A combination of at least one building material (BM) and a bath liquid for a process of direct printing of building components and models where: (A) the BM contains a low viscosity monomer- or oligomer compound of viscosity less than 200 mPa.s, at least one component of which is polymerized on contact with the bath liquid, the bath liquid consists of an aqueous solution containing an initiator which initiates polymerization of at least one component of the building material, or (B) the building material contains at least one low viscosity multifunctional compound of viscosity less than 200 mPa.s as crosslinker, and the bath liquid is a polymer or oligomer forming a branched chain or crosslinked polymer by reaction with the building material. Independent claims are included for: (1) use of the combination in a rapid prototyping process for preparation of BM by the steps: (a) preparation of at least one building component (BC) layer on a building base by selective application of the BM by a Drop-on Demand Technique, (b) filling of the recesses in the BC layer by application of a support liquid (bath liquid) of higher density than that of the BM, so that the upper side of the BC layer and the support liquid form a flush surface, (c) preparation of a BM on the flush surface of the preceding layer by selective application of the BM by the Drop-on Demand Technique, with application in the region of the BM surface formed from the support liquid in such a sequence that it is build up laterally on the already coated part of the BM layer, (d) preparation of a further layer by repetition of steps (b) and (c), and (e) separation of the BM from the support liquid; (2) use of the combination in a rapid prototyping process for preparation of BM by the steps:(a) preparation of one or more BM layers, preferably 1-5 layers on a building foundation by selective application of the BM by the Drop-on Demand Technique, where the building foundation (BF) is in a bath liquid, so that the BF surface is 10-700 micron above the surface of the bath liquid, (b) lowering of the BF so that the uppermost BC layer is lowered completely below the bath surface, (c) raising of the BF so that the uppermost BC layer is renewed (sic) 10-700 micron above the bath liquid surface, whereby recesses in the uppermost BC layer are filled by the bath liquid, (d) preparation of further BC layers (preferably 1-5) by selective application of BM by the Drop-on Demand Technique, (e) preparation of further layers by repetition of steps (b), (c), and (d), (f) separation of the BC from the bath liquid.