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US 10,906,089 B2Granted
Manufacture of parts using the lost wax method
AssigneeSafran Aircraft Engines
InventorsHervé Bruno Marc Osmont, Pascal Francis Patrick Gomez
Life of this patent
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Abstract
The invention relates to the making, on a support plate (34), of an annular space (76) in a ceramic paste covering this plate, in order, by successive deposits and firing of layers of said ceramic paste, to create a base of a ceramic shell (40) for the moulding of parts, the base having said annular space (76). For this purpose, between two deposits of said ceramic paste, and on the plate, said deformable annular element (82) will be deformed in order to break the ceramic layer.
Claims19
An assembly for moulding parts, the assembly comprising:
- a) a wax cluster comprising:
- models of the parts,
- a central barrel around which the models are arranged,
- segments that connect the models to the central barrel,
- a plurality of grain selection areas arranged respectively under the models, and
- b) a support plate for supporting the wax cluster,
- wherein said assembly further comprises a deformable annular element disposed on the support plate, between the central barrel and the grain selection areas, for creating an annular space at a location of a ceramic paste coating covering the deformable annular element.
4 more elements
An assembly comprising:
- a) a ceramic moulding shell for moulding parts made in a material, the ceramic moulding shell comprising:
- an upper neck, for entering the material in the ceramic moulding shell,
- a first central tube, erected and located under the upper neck,
- a plurality of peripheral moulding cavities having in hollow the shape of the parts to be moulded, the peripheral moulding cavities being arranged around the first central tube and connected to the first central tube and the upper neck by material circulation channels, as well as to lower material flow portions, the upper neck, the first central tube and the moulding cavities communicating together, and
- a bottom extending between a base of said first central tube and said lower material flow portions, the bottom having an annular space,
- b) a support plate for supporting the moulding shell,
- wherein said assembly further comprises a deformable annular element provided at the location of said annular space.
4 more elements
Dependencies are inferred from the claim text.