US3664410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Die casting densifier and ejector apparatus
Assignee: Trane US Inc
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Filing: 1969-06-12
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Granted: 1972-05-23
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Expires: 1989-06-12
Abstract
Abstract Covers metal casting methods and apparatus to minimize the formation of voids and to improve the quality of the final cast product. The casting mold, which is preferably positioned adjacent to other parts of the casting apparatus, is provided with an opening preferably adjacent to a ''''hot spot'''' of the casting space where the poured metal would be expected to solidify at a relatively slower rate, so that some of the molten metal will reach through and beyond the opening and form a metallic nib or projection. The casting equipment, which includes a movable rod, is operated to drive the rod against the nib or projection to force it through the opening surface and into pressurized contact with the casting material to overcome the voids which would otherwise be produced within the cast product.
Inventors
- 👤 Daniel Edward Groteke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:44
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
214 words
Apparatus for casting metal comprising a mold having a cavity in which molten metal is to be received, a first aperture in said mold through which molten metal is to be fed to said cavity, a second aperture in said mold for receiving a predetermined amount of said metal after it has passed through said cavity and completely filled said cavity and to form a metallic projection superimposed upon said cavity, said second aperture being positioned adjacent to an enlarged region of said cavity and being non-aligned with said first aperture, means for adjustably controlling and limiting the length of the metallic projection superimposed on the cavity of the mold through its second aperture, means for supplying a cooling medium to those parts of the mold which are adjacent said second aperTure to reduce the temperature of said metallic projection below the temperature of the metal within said cavity, a rod-like element which is movable in a direction so as to drive said cooled metallic projection into said cavity after it has been partially solidified to diminish any voids in said cavity, means for delaying the pressing means until said metallic projection has been partially solidified, and means for advancing said rod-like element further so as to eject the casting after it has solidified.
Claim 2
Dependent Claim
214 words
Apparatus for casting metal comprising a mold having a cavity in which molten metal is to be received, a first aperture in said mold through which molten metal is to be fed to said cavity, a second aperture in said mold for receiving a predetermined amount of said metal after it has passed through said cavity and completely filled said cavity and to form a metallic projection superimposed upon said cavity, said second aperture being positioned adjacent to an enlarged region of said cavity and being non-aligned with said first aperture, means for adjustably controlling and limiting the length of the metallic projection superimposed on the cavity of the mold through its second aperture, means for supplying a cooling medium to those parts of the mold which are adjacent said second aperTure to reduce the temperature of said metallic projection below the temperature of the metal within said cavity, a rod-like element which is movable in a direction so as to drive said cooled metallic projection into said cavity after it has been partially solidified to diminish any voids in said cavity, means for delaying the pressing means until said metallic projection has been partially solidified, and means for advancing said rod-like element further so as to eject the casting after it has solidified.
Claim 3
Dependent Claim
185 words
Apparatus for casting metal for producing a metallic casting substantially free of voids, comprising a mold having a first aperture, means for feeding molten metal into said mold through said first aperture to completely fill said mold and to provide an excess of the molten metal, a second aperture within said mold through which the excess of the molten metal supplied to said cavity is pressed so as to form a projection on the outside of said mold, said second aperture being positioned adjacent to an enlarged region of said cavity and being non-aligned with said first aperture, means for supplying a cooling medium to those parts of the mold which are adjacent said second aperture to reduce the temperature of said metallic projection below the temperature of the metal within said cavity, a rod-like element which is movable through a first predetermined distance to drive said cooled metallic projection into said cavity of said mold, and means for moving said rod-like element through a still further distance so as to eject the casting from the cavity of said mold after it has been solidified.
Claim 4
Dependent Claim
185 words
Apparatus for casting metal for producing a metallic casting substantially free of voids, comprising a mold having a first aperture, means for feeding molten metal into said mold through said first aperture to completely fill said mold and to provide an excess of the molten metal, a second aperture within said mold through which the excess of the molten metal supplied to said cavity is pressed so as to form a projection on the outside of said mold, said second aperture being positioned adjacent to an enlarged region of said cavity and being non-aligned with said first aperture, means for supplying a cooling medium to those parts of the mold which are adjacent said second aperture to reduce the temperature of said metallic projection below the temperature of the metal within said cavity, a rod-like element which is movable through a first predetermined distance to drive said cooled metallic projection into said cavity of said mold, and means for moving said rod-like element through a still further distance so as to eject the casting from the cavity of said mold after it has been solidified.
Claim 5
Dependent Claim
37 words
Apparatus for casting metal according to claim 2, including a screw-threaded means coupled to the mold for controlling and limiting the length of the metallic projection superimposed on the cavity of the mold through its second aperture.
Claim 6
Dependent Claim
38 words
Apparatus for casting metal according to claim 2 in which the second aperture in said mold is arranged so that the projection of material produced adjacent to said aperture is pointed toward a hot spot within said mold.
Claim 7
Dependent Claim
28 words
Apparatus for casting metal according to claim 2, in which said rod-like element is moved in a direction which substantially coincides with a hot spot within said cavity.
Claim 8
Dependent Claim
179 words
Apparatus for casting metal comprising a mold formed of a plurality of members providing a common cavity space, means including a first aperture in said mold through which is fed molten metal into said cavity space in an amount in excess of the full capacity of the cavity space, a second aperture in said mold which is non-aligned with the first aperture and through which is released the excess of the molten metal so as to form a longitudinal projection of said metal, said longitudinal projection being adjacent to an enlarged region within said cavity space, means for supplying cooling fluid to the region of said mold adjacent said projection for rapidly cooling and hardening said projection without substantially changing the temperature of the metal within said cavity space, piston-like means for driving said cooled and hardened projection into said mold so as to diminish voids therein, and means for further advancing the piston-like means through said second aperture after the members of said mold have been separated so as to eject the solidified casting from said cavity space.
Claim 9
Dependent Claim
179 words
Apparatus for casting metal comprising a mold formed of a plurality of members providing a common cavity space, means including a first aperture in said mold through which is fed molten metal into said cavity space in an amount in excess of the full capacity of the cavity space, a second aperture in said mold which is non-aligned with the first aperture and through which is released the excess of the molten metal so as to form a longitudinal projection of said metal, said longitudinal projection being adjacent to an enlarged region within said cavity space, means for supplying cooling fluid to the region of said mold adjacent said projection for rapidly cooling and hardening said projection without substantially changing the temperature of the metal within said cavity space, piston-like means for driving said cooled and hardened projection into said mold so as to diminish voids therein, and means for further advancing the piston-like means through said second aperture after the members of said mold have been separated so as to eject the solidified casting from said cavity space.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |