Core for an investment casting process
AssigneeROLLS-ROYCE plc
InventorsSimon Lloyd JONES, Mark John SIMMS
Life of this patent
Estimating the term…
Abstract
There is described a core for an investment casting process, comprising: a core passage which extends between a first point and a second point along a tortuous path having length L, wherein the first point and second point are separated by a direct line of sight distance, S, wherein L is greater than S; and, a core bridge which extends between the first and second points away from the core passage.
Claims13
A core for an investment casting process in which a component to be cast has an internal passageway and an exterior wall, the internal passageway being provided by the core, the core comprising:
- a core passage which extends between a first point and a second point along a tortuous path having length L, wherein the first point and second point are separated by a direct line of sight distance, S, wherein L is greater than S;
- and,
- a core bridge which extends away from the core passage between the first and second points,
- wherein the core bridge comprises first and second pillars which connect to the first and second points, and a bridge portion which extends between the first and second pillars.
A ceramic shell for an investment casting process in which a component to be cast has an internal passageway and an exterior wall, the internal passageway being provided by a core, the ceramic shell comprising:
- a core comprising:
- a core passage which extends between a first point and a second point along a tortuous path having length L, wherein the first point and second point are separated by a direct line of sight distance, S, wherein L is greater than S;
- and,
- a core bridge which extends away from the core passage between the first and second points,
- wherein the core bridge comprises first and second pillars which connect to the first and second points, and a bridge portion which extends between the first and second pillars.
- an outer layer of a sacrificial material enveloping the core,
- wherein the core bridge extends between the core passage and the ceramic shell through the sacrificial material and a portion of the bridge is located within the ceramic shell.
A cast component, comprising:
- at least one internal passageway formed by a core comprising:
- a core passage which extends between a first point and a second point along a tortuous path having length L, wherein the first point and second point are separated by a direct line of sight distance, S, wherein L is greater than S;
- and, a core bridge which extends away from the core passage between the first and second points, wherein the core bridge comprises first and second pillars which connect to the first and second points, and a bridge portion which extends between the first and second pillars, the component comprising:
- an aperture to the internal passageway at a first point and a cap sealing an aperture at a second point, wherein the internal passageway extends between the first point and the second point along a tortuous path having length L, wherein the first point and second point are separated by a direct line of sight distance, S, wherein L is greater than S, wherein the apertures at the first and second points correspond to the connections of the first and second pillars provided by the core.
Dependencies are inferred from the claim text.