Patent US3658115A successfully refreshed from Google Patents.
US3658115A
Expired / Lapsed
US
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Method of inoculating nodular cast iron
Assignee: Motors Liquidation Co
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Filing: 1970-11-30
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Granted: 1972-04-25
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Expires: 1990-11-30
Abstract
Abstract An improved method of inoculating nodular cast iron to obtain uniform and thorough inoculation of nodular iron simultaneously with the casting thereof is disclosed. A preformed inoculant agent body having perforations extending between the opposing faces thereof and congruent ferrous metal cover plates contacting the body faces is placed in a stationary position across the gating system of the mold so as to cause the molten iron entering the mold to flow through the perforations uniformly dissolving the inoculant agent on contact and being inoculated thereby just prior to casting thereof. The ferrous metal cover plates extend the life of the inoculant body and result in more uniform inoculation and, consequently, a more uniform microstructure in the cast iron than otherwise obtainable.
Inventors
- 👤 Edward F Ryntz Jr
- 👤 Thomas E O'coner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:26
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10; B; B22; B22D; B22D1/00; B22D1/007
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
170 words
A method of inoculating molten nodular cast iron simultaneously with the casting thereof comprising, providing a mold including a mold cavity and a gating system communicating with said mold cavity, disposing within said mold an inoculant mold insert comprising a preformed body of a nodular iron inoculant agent, said body having generally parallel opposing faces with a plurality of perforations extending through said body between said faces, and a correspondingly shaped, congruently perforated ferrous metal cover plate contacting each of said faces of said body, said insert extending across said gating system with said faces being substantially perpendicular to and said perforations being substantially aligned with the direction of flow of said molten iron through said gating system at said insert, introducing said molten iron into said gating system, and causing said molten iron to flow through said gating system, through said perforations in said insert uniformly dissolving the inoculant agent on contact and being inoculated thereby while flowing therethrough, and into said mold cavity to form a casting therein.
Claim 2
Independent Claim
177 words
A method of inoculating molten nodular cast iron with a ferrosilicon inoculant agent simultaneously with the casting thereof comprising, providing a mold including a mold cavity and a gating system communicating with said mold cavity, disposing within said mold an inoculant mold insert comprising a preformed body of bonded particulate ferrosilicon inoculant agent, said body having generally parallel opposing faces with a plurality of perforations extending through said body between said faces, and at least one correspondingly shaped, congruently perforated ferrous metal cover plate contacting one of said faces of said body, said insert extending across said gating system with said faces being substantially perpendicular to and said perforations being substantially aligned with the direction of flow of said molten iron through said gating system at said insert, introducing said molten iron into said gating system, aNd causing said molten iron to flow through said gating system, through said perforations in said insert uniformly dissolving the ferrosilicon particles on contact and being inoculated thereby while flowing therethrough, and into said mold cavity to form a casting therein.
Claim 3
Independent Claim
211 words
A method of inoculating molten nodular cast iron simultaneously with the casting thereof comprising, providing a mold including a mold cavity and a gating system communicating with said mold cavity, disposing within said mold an inoculant mold insert comprising a preformed body of a nodular iron inoculant agent, said preformed body having a base portion and a body portion with said body portion having generally parallel opposing faces with a plurality of perforations extending through said body portion between said faces of said body portion, and at least one correspondingly shaped, congruently perforated ferrous metal cover plate contacting one of said faces of said body portion, said base portion of said insert being embedded in said mold and said body portion of said insert extending across said gating system with said faces of said body portion being substantially perpendicular to and said perforations being substantially aligned with the direction of flow of said molten iron through said gating system at said insert, introducing said molten iron into said gating system, and causing said molten iron to flow through said gating system, through said perforations in said insert uniformly dissolving the inoculant agent on contact and being inoculated thereby while flowing therethrough, and into said mold cavity to form a casting therein.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |