Patent US3672429A successfully refreshed from Google Patents.
US3672429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the centrifugal casting of metal in a rotating horizontal shell
Assignee: Individual
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Filing: 1969-09-15
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Granted: 1972-06-27
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Expires: 1989-09-15
Abstract
Abstract A process for centrifugal casting of metal components in a mold revolving around a vertical axis by supplying liquid metal into a cavity in the mold and rotating the mold to cause the liquid metal to be transferred radially outwardly in the cavity by centrifugal force, while simultaneously applying a vacuum to the cavity for degassing the molten metal during casting thereof to prevent oxidation of the molten metal while it is being supplied into the cavity through radial channels formed in the bottom there.
Inventors
- 👤 Pierre Lajoye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:17
CPC Classifications
B; B22; B22D; B22D13/00; B22D13/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A process for the centrifugal casting of metal components in a horizontal shell adapted to revolve about a vertical axis, comprising the steps of: a. providing a cavity below a mold and in communication therewith for receiving molten metal to be cast; b. forming generally radial channels in the bottom of said mold for distribution of the molten metal from said cavity; c. heating said cavity to maintain molten metal supplied thereto in a liquid state; d. supplying liquid metal into said cavity at a rate of flow to prevent overflow of the generally radial channels; e. rotating said mold and said cavity at a speed sufficient to cause the liquid metal contained in said cavity to be transferred to said mold by centrifugal force and conform to the configuration of said mold while preventing overflow of the generally radial channels to provide smooth radial transfer of the molten metal to the mold and preventing undesirable turbulence in the molten metal.
Claim 2
Dependent Claim
161 words
A process for the centrifugal casting of metal components in a horizontal shell adapted to revolve about a vertical axis, comprising the steps of: a. providing a cavity below a mold and in communication therewith for receiving molten metal to be cast; b. forming generally radial channels in the bottom of said mold for distribution of the molten metal from said cavity; c. heating said cavity to maintain molten metal supplied thereto in a liquid state; d. supplying liquid metal into said cavity at a rate of flow to prevent overflow of the generally radial channels; e. rotating said mold and said cavity at a speed sufficient to cause the liquid metal contained in said cavity to be transferred to said mold by centrifugal force and conform to the configuration of said mold while preventing overflow of the generally radial channels to provide smooth radial transfer of the molten metal to the mold and preventing undesirable turbulence in the molten metal.
Claim 3
Dependent Claim
42 words
The process as claimed in claim 1 further comprising the steps of simultaneously supplying the molten metal to said cavity while rotating the shell and discharging the molten metal into said cavity at the bottom and in the center of said cavity.
Claim 4
Dependent Claim
54 words
The process as claimed in claim 2, further comprising the steps of supplying a molten metal to said cavity through a vertical tube having one end attached to the center of the bottom of said cavity and in communication with said cavity and its other end in communication with a source of molten metal.
Claim 5
Dependent Claim
46 words
A process as claimed in claim 1 further comprising the step of providing a metal sleeve having an internal refractory lining above and at the center of the mold for forming a cavity in which the oxides are gathered at the completion of a centrifuging operation.
Claim 6
Dependent Claim
39 words
A process as claimed in claim 1 further comprising the step of connecting the top of the mold to a vacuum source during rotation of the shell for performing a de-gassing operation on the molten metal during casting thereof.
Claim 7
Dependent Claim
39 words
A process as claimed in claim 1, further comprising the step of varying the speed of rotation of the mold to progressively fill the shrinkage hole which tends to be formed in the cast part as the metal solidifies.
Claim 8
Dependent Claim
33 words
A process as claimed in claim 2, further comprising the step of providing a vertical filling tube means extending downwardly into the cavity for feeding molten metal into the bottom of the cavity.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |