Patent ID: 8397790
Filing Date: 2013-03-19
Classification: B22C,F01D,F05D

Abstract:
1. A method of manufacture of a wax model of an annular bladed turbomachine stator assembly for manufacture of a mould of this bladed assembly, the model including two coaxial shrouds, respectively radially internal and radially external, which shrouds are connected to one another by multiple blades, at least one of which includes an internal cavity, the method comprising: using a metal mould having roughly a shape to be given to the model of an annular bladed assembly; positioning of a core, intended to form an impression of the cavity, in a portion of the metal mould which defines the blade including the cavity, the core including a generally lengthened shape with a radially external end assembled on the metal mould; injecting a wax in the metal mould fitted with the core; and after the wax has cooled, removing the resulting wax model, fitted with the core, from the mould, wherein the core is manufactured in metal, and is positioned such that its radially internal end is housed in the portion of the mould defining the blade including the cavity, not contacting the radially internal shroud portion of the mould.