Brief description of embodiments of complex cores in the foundry ceramic for.

摘要

The present invention relates to a method of producing a complex core made of ceramic for casting, of the type having recesses which extend inside the core, said core being intended for the manufacture of a hollow part comprising the internal cavities and the partitions, in particular a turbomachine blade, by the method of the foundry, known as lost wax. & br / this process is characterized in that it carries out the solid body (8) by successive injections and superposed, in at least one mold, of at least two compositions of which one is degradable, without harming the other or to the other, the first injection, making it possible to create a blank (9) formed of one or other of said compositions, and the following successive injections to be covered, at least in part, the external surface of the blank (9) obtained in the previous injection, with a layer of material (10) constituted by the composition.