MOULD FOR AN ABRADABLE TRACK BENEATH THE INNER SHROUD OF AN AXIAL-FLOW TURBOMACHINE COMPRESSOR

摘要

The invention relates to a mould for injecting a layer of abradable material, such as silicone, inside an inner shroud of an axial-flow turbomachine. The mould comprises a circular wall or tubular wall extending axially and two annular walls extending radially outwardly from the axial ends of the axial wall. Each radial wall of the mould comprises an annular hook in contact with the outer surface of the shroud so as to hold the mould against the shroud. The injection pressure presses the hooks against the shroud, providing a seal. The walls form an annular moulding cavity inside the inner shroud in combination with the inner shroud. The invention also relates to a method for moulding an abradable layer inside the shroud with the aid of the mould. The latter is deformed by spreading apart the hooks so as to fit over the shroud.

主权项

1. A mould for injecting a layer of abradable material inside a shroud of an axial-flow turbomachine, the shroud comprising an annular outer surface radially opposed to the abradable layer, said mould comprising:
a circular axial wall extending axially and including
a first circular axial end,and a second axial end; two annular walls extending radially outwardly from one of the first axial end and the second axial end of the circular axial wall; the walls of the mould structured and operable to form an annular moulding cavity inside the shroud in combination with the shroud, wherein each radial wall of the mould comprises an annular hook structured and operable to be in circular contact with the annular outer surface of the shroud so as to allow the mould to be radially held in relation to the shroud's annular outer surface.