The lost wax casting method (or micro-fusion) is another technique of disposable shaping whereby a wax model is prepared, usually by means of pressure casting, and is volatilized in an oven thus generating a cavity which is then filled with cast metal. The first step therefore involves producing the wax models with each mould making one piece. After having placed the models in a cluster, complete with an alimentation channel which is also made of wax, it is covered with