PROCESS FOR THE PRODUCTION OF CORES OF SILICA FOR COMPONENTS OF AERONAUTICAL AND INDUSTRIAL TURBINES
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Feb 5, 2016
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Feb 9, 2015
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Abstract
The present invention concerns a process for the production of cores of silica for aeronautical and industrial turbine components, comprising the following steps: manufacturing of a metal mother mold; manufacturing of a plaster mold by means of casting in the mother mold of a mixture of water and plaster and subsequent drying; casting in a cavity of said plaster mold of a mixture of silica and water; resting of the mixture of silica inside the plaster mold, with water absorption by the mold and solidification of a core of silica; extracting of the core of silica from the mold and air drying at a temperature not exceeding 50° C.; sintering of the core of silica; finishing and dimensional inspecting of the core. The invention additionally concerns a core for aeronautical and industrial turbine components characterised by the fact of being constituted of silica, i.e. totally free from alumina and/or zirconium silicates.
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