Lost wax moulding manufacturing process
AssigneeSafran Aircraft Engines
InventorsDidier Maurice Marceau Guerche, Joseph Toussaint Tami Lizuzu
Life of this patent
Estimating the term…
Abstract
A method for making a wax model for the manufacture of a part, the part including at least one cavity, the method including: arranging at least two core elements made of a ceramic material into a wax mold, the core elements having at least partially a shape complementary to the cavity of the part to be manufactured, and injecting wax into the wax mold, around the core elements, so as to form the wax model, the two core elements being assembled prior to the injection of wax by at least one staple, the staple including a central portion from which two branches extend, each branch being fitted into an orifice formed in one of the core elements.
Claims10
1-7. (canceled)
A method for making a wax model for manufacturing a part, said part comprising a cavity, the method comprising the steps of:
- arranging at least two core elements made of a ceramic material in a wax mold, said two core elements having, at least partially, a shape complementary to the cavity of the part to be manufactured;
- assembling the two core elements together by a staple, wherein the staple includes a central portion from which two branches extend, each branch of the two branches being fitted into a respective orifice formed in a respective one of the two core elements, and wherein the orifice of at least one of the two core elements is an open-through orifice, the branch of the two branches of the staple passing through said open-through orifice having a free end folded over the core element that has the open-through orifice so as to maintain the staple in position;
- and
- injecting wax into the wax mold, around the assembled two core elements, so as to form the wax model.
A method for manufacturing a part having at least one cavity, the method comprising the steps of:
- making a wax model by:
- arranging at least two core elements made of a ceramic material in a wax mold, said two core elements having, at least partially, a shape complementary to the cavity of the part to be manufactured;
- assembling the two core elements together by a staple, wherein the staple includes a central portion from which two branches extend, each branch of the two branches being fitted into a respective orifice formed in a respective one of the two core elements, and wherein the orifice of at least one of the two core elements is an open-through orifice, the branch of the two branches of the staple passing through said open-through orifice having a free end folded over the core element that has the open-through orifice so as to maintain the staple in position;
- and
- injecting wax into the wax mold, around the assembled two core elements, so as to form the wax model,
- forming a shell mold made of a ceramic material from the wax model;
- eliminating the wax model;
- and
- casting a molten metallic material into the shell mold.
Dependencies are inferred from the claim text.