US3656539A - Apparatus for casting molten metal - Google Patents
Apparatus for casting molten metal Download PDFInfo
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- US3656539A US3656539A US794974*A US3656539DA US3656539A US 3656539 A US3656539 A US 3656539A US 3656539D A US3656539D A US 3656539DA US 3656539 A US3656539 A US 3656539A
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- molten metal
- casting
- ingate
- mold
- passageway
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/20—Stack moulds, i.e. arrangement of multiple moulds or flasks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
Definitions
- the mold is preferably formed from separable 1,579,743 4/ 1926 WarlOW, Jr- 164/129 graphite cope and drag sections and may include an outer cast 1,358,435 1 1/ 1920 1:1'21I11 164/129 X iron chill ring to impart the desired outer contour to the cast- 3,532,154 l0/ 1970 Ba1eVSkl--- --164119 ing with accuracy.
- a plurality of such molds may be stacked 1,1 Grey 1 8 and in one pouring operation. 2,448,903 9/1948 Millen... ....164/306 UX 407,732 7/1889 .lowitt 164/371 X 4 Claims, 2 Drawing Figures "11s "t 6 ini l 5, 11 7o il@ 9.1.?
- This invention relates to a method and apparatus for casting molten metal and more particularly to a bottom pressure casting operation wherein molten metal is forced upward by the application of superatmospheric pneumatic pressure into a mold where the metal solidifies or partially solidifies.
- the constant pressure system employs a suitable valve arrangement in conjunction with the pneumatic pressure source to maintain the pressure on the molten metal constant at a level required to retain the metal in the mold.
- One type of mechanical arrangement includes a refractory stopper in the ingate of the mold, which is closed upon completion'of the pouring operation.
- Another mechanical device comprises a horizontal slide having an open position during the pouring operation and movable to a closed position after the casting cavity has been filled.
- an object of this invention is to provide a method and apparatus for casting articles by bottom pressure casting that does not employ mechanical means or pneumatic pressure means to retain the molten metal in the mold upon completion ofthe pouring operation.
- Another object of this invention is the provision of a novel mold structure which retains substantially only that molten metal needed to form the desired casting.
- FIG. l is a vertical sectional view of a bottom pressure casting apparatus that incorporates features of the presently described invention.
- FIG. 2 is a plan view ofthe cast iron contour ring used in the mold shown in FIG. l.
- the apparatus for bottom pressure casting shown in FIG. l comprises a ladle, generally indicated at 10, having an inner refractory lining 12 and an outer metallic shell 14, said ladle being disposed within a pressure tank 16.
- a cover 18 having suitable insulation 20 on the inner side thereof is releasably clamped on the pressure tank 16 by means of a suitable clamping device, generally indicated at 22, and is sealed to the tank by an annular resilient seal 21 therebetween.
- clamping device 22 may include a lever 24 pivotally suspended from the edges of the cover I8.
- a hydraulic or pneumatic ram 26 may be mounted upon the tank supporting framework 28 to engage an arm 23 of the lever 24 in a downward direction.
- a roller 25 may be mounted on the lever 24 to be engageable with a flat vertical to the tank 16.
- a refractory pouring tube 30 is disposed centrally within the ladle l0 with its lower end 31 proximate the bottom of the ladle and its upper end 33 extending through and above the cover 18 and secured to an adapter 32 sealed to the cover.
- the tank 16 is thus substantially sealed, such that application of superatmospheric pressure thereto from a suitable source, such as that indicated at 34, connected to the tank will cause the molten metal 36 to rise upward in the pouring tube 30 to fill the mold 40.
- the upper portion of the adapter 32 is flared outward at 38 to receive a female member 42 of the mold assembly, generally indicated at 40.
- the mold assembly 40 is composed of a chill material, such as graphite, and comprises an upper or cope section 44 and a lower or drag section 46, which in turn communicates with an ingate 48 formed centrally therein.
- the mating surfaces of the cope and drag sections are machined or formed to together define a casting cavity such as 50 therebetween, with a common central passageway 52 in cornmunication with the ingate 48 for the admission of molten metal from the ladle 10.
- the passageway 52 in the cope section 44 extends upward and is open to the atmosphere.
- the mold assembly 40 may also comprise one or more intermediate and interchangeable mold sections 54 between the cope 44 and drag 46 sections, the purpose of which is to form additional casting cavities. It may be seen that the underside of each intermediate mold section 54 is adapted to serve as the cope section for the mating mold section located therebelow, while the upper side is adapted to serve as a drag section for the mating section thereabove, thereby defining a series of casting cavities in a vertically spaced relationship.
- the intermediate sections 54 and the cope and drag sections, 44 and 46, respectively, are mounted within suitable frame members 60, and retainers 62 are provided between adjacent frame members to hold the mold sections in an assembled relationship. When assembled, the mold 40 is designed such that the ingate 48 thereof is in register with the bore 64 of the pouring tube 30.
- a groove 66 is formed near the outer periphery of each drag section surface to retain a flange 68 depending from a contour insert member 70.
- a contour insert member 70 One possible configuration of such a member is shown in FIG. 2, which may include a round outer surface 71 and an inner contoured surface 72 of any desired shape, such as the sprocket contour shown.
- the insert member 70 is preferably composed of cast iron to insure accurate contours with repeated usage, but other chill materials, such as graphite, may sometimes be employed.
- annular continuous dam or weir 74 is provided as part of each drag section of the mold around the central passageway 52 or ingate 48, as the case may be.
- the apex 7 6 of each weir 74 extends upward for a height equal to or above the height of the casting cavity 50, and each adjacent cope section is suitably contoured, such as at 78 to accommodate the weir.
- Refractory cores 80 may be inserted between adjacent cope and drag sections, in order to impart apertures to the casting.
- Suitable vent holes 82 communicating with the atmosphere at 84 and 8S may be provided within the graphite mold sections 44, 46 and 54 above and below and communicating with the refractory cores 80.
- the cores 80 are preferably composed of a Zircon sand bonded by a resin material or other suitable ceramic material and are designed to seat in the lower vent hole.
- the ingate 48 is lined with a ceramic material ⁇ throughout substantially the entire length of the mold. This feature prevents freezing of the metal in the mold during the casting operation and allows the metal to drain freely from the ingate 48, as described below.
- each casting cavity 50 serves as a receptacle with the weir 74 preventing return of metal in the cavity.
- the mold is designed to retain sufficient metal in the casting cavity 50 in order to accommodate volume contraction of the metal upon solidification. While some metal may have to be removed by machining from the central portion of the casting, it may be seen substantially only that metal which is needed to produce the final product is retained.
- An apparatus for casting molten metal comprising a mold having an upper section and a lower section, said upper and lower sections mating with one another and formed to define a casting cavity therebetween, ingate means in said mold for communication between said casting cavity and a source of molten metal, means for moving said molten metal into said ingate means to fill said casting cavity, drain means in a lower portion of said mold for draining molten metal away from said casting cavity, were means vertically surrounding said drain means for retaining molten metal up to the intended height of the casting in said casting cavity upon the filling thereof, a plurality of bonded refractory cores between said upper and lower sections within said casting cavity, and vent means extending from said cores to the exterior of said mold.
- An apparatus for casting molten metal comprising an upper section, a lower section, a plurality of interchangeable mold sections engaged with one another and located between said upper section and said lower section, said mold sections together with said upper section and said lower section extending in a generally upward direction and defining therebetween a plurality of annular casting cavities, a plurality of refractory cores in said casting cavities, vent means connecting certain of said cores to the exterior of said casting cavities, a common upwardly extending passageway centrally located relative to said annular casting cavities and in fluid communication.
- each of' said casting cavities through an annular opening
- an ingate located in said lower section, said ingate being in fluid communication with said passageway
- a plurality of annular continuous weirs around said central passageway each of said weirs being located adjacent to one of said openings to each of said casting cavities and having a circular apex extending upwardly to a height above the uppermost portion of the respective casting cavity, means to force molten metal upwardly through said ingate into said passageway over the circular apex of each of said weirs to fill each of said casting cavities, and means to remove said molten metal from said passageway whereby said weirs will retain molten metal in said casting cavities.
- said means to force molten metal comprises a vessel filled with molten metal located below said lower section, an upwardly extending tube communicating with said molten metal and said ingate means, means to exert pressure on said molten metal in said vessel to force molten metal upwardly through said tube into said ingate means and said passageway and wherein said means to remove said molten metal comprises means to reduce said pressure on said molten metal to allow said molten metal in said passageway and said ingate means to return to said tube.
- vent means includes an upwardly extending tube between said cores along said line, said tube being partially defined by a portion of said upper section and by portions of said mold*sectiorls.
Abstract
Molten metal is forced upwardly by bottom pressure casting through an ingate and into the casting cavity of a mold having a dam to retain the metal in the cavity after the ingate has been drained. The mold is preferably formed from separable graphite cope and drag sections and may include an outer cast iron chill ring to impart the desired outer contour to the casting with accuracy. A plurality of such molds may be stacked and filled in one pouring operation.
Description
nited States Patent Zickefoose [451 Apr. 18, 1972 [54] APPARATUS FOR CAS'HNG MOLTEN 953,999 4/1910 Levering 164/371 METAL 1,797,041 3/1931 Becker... 164/309 2,195,960 4 1940 Morris... ..164 336 [72] lnVelltOl'Z ElllS J. ZlckefOSe, Elmhurst, 2,852,822 9l958 Strom l64/36 x Assignee; Amsted Industries Incorporated Chicago, Gl'oteke m. 3,532,154 10/1970 Balevski et a1 ..164/337 X [22] Filed: Jan. 29, 1969 FOREIGN PATENTS OR APPLICATIONS [2l] Appl. No.: 794,974 13,593 7/1909 l Great Britain 164/306 477,384 7/1915 France [52] U.s. c1 .164/3119, 164/119, 164/129 290936 5/1928 Great Bma --164/306 [51] Int. Cl. 132211 17/06, B22d 27/14 [5s] Field ofsearch ..164/1 19, 77, 62, 129, 133, Pf'ffmfy Emmfef-l Spencefovefholsef 164/143, 4, 306, 309, 371, 372, 373, 63, 65 AssistantExaminer-1l E. Roethel Attorney-Walter L. Schlegel, Jr. and Russell W. Pyle [56] References Cited [57] ABSTRACT UNITED STATES PATENTS Molten metal is forced upwardly'by bottom pressure casting 1,013,548 1/1912 Grey..- ..164/1 19 through an ingate and into the casting cavity ofa mold having 2,210,544 8/ 1940 G21110W2y- -1641 19 X a dam to retain the metal in the cavity after the ingate has 3,506,061 4/ 1970 Clemm 164/ 129 X been drained. The mold is preferably formed from separable 1,579,743 4/ 1926 WarlOW, Jr- 164/129 graphite cope and drag sections and may include an outer cast 1,358,435 1 1/ 1920 1:1'21I11 164/129 X iron chill ring to impart the desired outer contour to the cast- 3,532,154 l0/ 1970 Ba1eVSkl--- --164119 ing with accuracy. A plurality of such molds may be stacked 1,1 Grey 1 8 and in one pouring operation. 2,448,903 9/1948 Millen... ....164/306 UX 407,732 7/1889 .lowitt 164/371 X 4 Claims, 2 Drawing Figures "11s "t 6 ini l 5, 11 7o il@ 9.1.? f j y 54 111i i l, "z 4s 'ug 4o 26 22 2| e5 M'""f-Y4 A 20 a 2e ,mwfrr PATENTEDAPR 1a ma FIG. l
INVENTOR. EL LIS J. ZICGEFOOSE APPARATUS FOR CASTING MOLTEN METAL BACKGROUND OF THE INVENTION l Field of the Invention This invention relates to a method and apparatus for casting molten metal and more particularly to a bottom pressure casting operation wherein molten metal is forced upward by the application of superatmospheric pneumatic pressure into a mold where the metal solidifies or partially solidifies.
2. Description of the Prior Art After the casting cavity of the mold is filled in a bottom pressure casting operation, means must be employed to retain the metal in the mold until the desired degree of solidification has occurred, in order to prevent the metal from returning to the ladle. The various methods that have been employed for this purpose have included constant pressure systems and mechanical valve devices.
The constant pressure system employs a suitable valve arrangement in conjunction with the pneumatic pressure source to maintain the pressure on the molten metal constant at a level required to retain the metal in the mold. One type of mechanical arrangement includes a refractory stopper in the ingate of the mold, which is closed upon completion'of the pouring operation. Another mechanical device comprises a horizontal slide having an open position during the pouring operation and movable to a closed position after the casting cavity has been filled.
While the above mentioned methods have been found to be effective and commercially successful, they are not readily adaptable to the production of certain shapes, such as those having a central void. The use of a stopper or slide may necessarily cause entrapment of the metal in the central portion of the casting cavity as well as in its outer periphery, requiring the later removal of the central solidified metal to produce a finished product. Since the entrapment of excess metal is detrimental to a high yield, it is highly desirable, if possible, to initially cast the article in its substantially finished or final shape.
Accordingly, an object of this invention is to provide a method and apparatus for casting articles by bottom pressure casting that does not employ mechanical means or pneumatic pressure means to retain the molten metal in the mold upon completion ofthe pouring operation.
Another object of this invention is the provision of a novel mold structure which retains substantially only that molten metal needed to form the desired casting.
SUMMARY OF THE INVENTION The above objects are accomplished by means of a weir or dam in the casting cavity, which retains metal therein but allows excess metal to return to the ladle upon relieving pressure to the tank. A novel mold construction is also employed, utilizing interchangeable intermediate mold sections to form a plurality of mold cavities.
BRIEF DESCRIPTION OF THE DRAWING FIG. l is a vertical sectional view of a bottom pressure casting apparatus that incorporates features of the presently described invention; and
FIG. 2 is a plan view ofthe cast iron contour ring used in the mold shown in FIG. l.
DESCRIPTION OF THE PREFERRED EMBODIMENT With more particular reference to the drawing, the apparatus for bottom pressure casting shown in FIG. l comprises a ladle, generally indicated at 10, having an inner refractory lining 12 and an outer metallic shell 14, said ladle being disposed within a pressure tank 16. A cover 18 having suitable insulation 20 on the inner side thereof is releasably clamped on the pressure tank 16 by means of a suitable clamping device, generally indicated at 22, and is sealed to the tank by an annular resilient seal 21 therebetween. As shown, the
A refractory pouring tube 30 is disposed centrally within the ladle l0 with its lower end 31 proximate the bottom of the ladle and its upper end 33 extending through and above the cover 18 and secured to an adapter 32 sealed to the cover. The tank 16 is thus substantially sealed, such that application of superatmospheric pressure thereto from a suitable source, such as that indicated at 34, connected to the tank will cause the molten metal 36 to rise upward in the pouring tube 30 to fill the mold 40.
The upper portion of the adapter 32 is flared outward at 38 to receive a female member 42 of the mold assembly, generally indicated at 40. The mold assembly 40 is composed of a chill material, such as graphite, and comprises an upper or cope section 44 and a lower or drag section 46, which in turn communicates with an ingate 48 formed centrally therein. The mating surfaces of the cope and drag sections are machined or formed to together define a casting cavity such as 50 therebetween, with a common central passageway 52 in cornmunication with the ingate 48 for the admission of molten metal from the ladle 10. The passageway 52 in the cope section 44 extends upward and is open to the atmosphere.
As shown in FIG. ll, the mold assembly 40 may also comprise one or more intermediate and interchangeable mold sections 54 between the cope 44 and drag 46 sections, the purpose of which is to form additional casting cavities. It may be seen that the underside of each intermediate mold section 54 is adapted to serve as the cope section for the mating mold section located therebelow, while the upper side is adapted to serve as a drag section for the mating section thereabove, thereby defining a series of casting cavities in a vertically spaced relationship. The intermediate sections 54 and the cope and drag sections, 44 and 46, respectively, are mounted within suitable frame members 60, and retainers 62 are provided between adjacent frame members to hold the mold sections in an assembled relationship. When assembled, the mold 40 is designed such that the ingate 48 thereof is in register with the bore 64 of the pouring tube 30.
A groove 66 is formed near the outer periphery of each drag section surface to retain a flange 68 depending from a contour insert member 70. One possible configuration of such a member is shown in FIG. 2, which may include a round outer surface 71 and an inner contoured surface 72 of any desired shape, such as the sprocket contour shown. The insert member 70 is preferably composed of cast iron to insure accurate contours with repeated usage, but other chill materials, such as graphite, may sometimes be employed.
As shown in FIG. l, an annular continuous dam or weir 74 is provided as part of each drag section of the mold around the central passageway 52 or ingate 48, as the case may be. The apex 7 6 of each weir 74 extends upward for a height equal to or above the height of the casting cavity 50, and each adjacent cope section is suitably contoured, such as at 78 to accommodate the weir. Refractory cores 80 may be inserted between adjacent cope and drag sections, in order to impart apertures to the casting. Suitable vent holes 82 communicating with the atmosphere at 84 and 8S may be provided within the graphite mold sections 44, 46 and 54 above and below and communicating with the refractory cores 80. The cores 80 are preferably composed of a Zircon sand bonded by a resin material or other suitable ceramic material and are designed to seat in the lower vent hole.
lt should be noted that the ingate 48 is lined with a ceramic material `throughout substantially the entire length of the mold. This feature prevents freezing of the metal in the mold during the casting operation and allows the metal to drain freely from the ingate 48, as described below.
lclaim:
l. An apparatus for casting molten metal comprising a mold having an upper section and a lower section, said upper and lower sections mating with one another and formed to define a casting cavity therebetween, ingate means in said mold for communication between said casting cavity and a source of molten metal, means for moving said molten metal into said ingate means to fill said casting cavity, drain means in a lower portion of said mold for draining molten metal away from said casting cavity, wer means vertically surrounding said drain means for retaining molten metal up to the intended height of the casting in said casting cavity upon the filling thereof, a plurality of bonded refractory cores between said upper and lower sections within said casting cavity, and vent means extending from said cores to the exterior of said mold.
2. An apparatus for casting molten metal comprising an upper section, a lower section, a plurality of interchangeable mold sections engaged with one another and located between said upper section and said lower section, said mold sections together with said upper section and said lower section extending in a generally upward direction and defining therebetween a plurality of annular casting cavities, a plurality of refractory cores in said casting cavities, vent means connecting certain of said cores to the exterior of said casting cavities, a common upwardly extending passageway centrally located relative to said annular casting cavities and in fluid communication. with each of' said casting cavities through an annular opening, an ingate located in said lower section, said ingate being in fluid communication with said passageway, a plurality of annular continuous weirs around said central passageway, each of said weirs being located adjacent to one of said openings to each of said casting cavities and having a circular apex extending upwardly to a height above the uppermost portion of the respective casting cavity, means to force molten metal upwardly through said ingate into said passageway over the circular apex of each of said weirs to fill each of said casting cavities, and means to remove said molten metal from said passageway whereby said weirs will retain molten metal in said casting cavities.
3. The apparatus set out in claim 2 wherein said means to force molten metal comprises a vessel filled with molten metal located below said lower section, an upwardly extending tube communicating with said molten metal and said ingate means, means to exert pressure on said molten metal in said vessel to force molten metal upwardly through said tube into said ingate means and said passageway and wherein said means to remove said molten metal comprises means to reduce said pressure on said molten metal to allow said molten metal in said passageway and said ingate means to return to said tube.
4. The apparatus set out in claim 2 wherein certain of said cores are located along an upwardly extending line through said cavities, and said vent means includes an upwardly extending tube between said cores along said line, said tube being partially defined by a portion of said upper section and by portions of said mold*sectiorls.
Claims (4)
1. An apparatus for casting molten metal comprising a mold having an upper section and a lower section, said upper and lower sections mating with one another and formed to define a casting cavity therebetween, ingate means in said mold for communication between said casting cavity and a source of molten metal, means for moving said molten metal into said ingate means to fill said casting cavity, drain means in a lower portion of said mold for draining molten metal away from said casting cavity, weir means vertically surrounding said drain means for retaining molten metal up to the intended height of the casting in said casting cavity upon the filling thereof, a plurality of bonded refractory cores between said upper and lower sections within said casting cavity, and vent means extending from said cores to the exterior of said mold.
2. An apparatus for casting molten metal comprising an upper section, a lower section, a plurality of interchangeable mold sections engaged with one another and located between said upper section and said lower section, said mold sections together with said upper section and said lower section extending in a generally upward direction and defining therebetween a plurality of annular casting cavities, a plurality of refractory cores in said casting cavities, vent means connecting certain of said cores to the exterior of said casting cavities, a common upwardly extending passageway centrally located relative to said annular casting cavities and in fluid communication with each of said casting cavities through an annular opening, an ingate located in said lower section, said ingate being in fluid communication with said passageway, a plurality of annular continuous weirs around said central passageway, each of said weirs being located adjacent to one of said openings to each of said casting cavities and having a circular apex extending upwardly to a height above the uppermost portion of the respective casting cavity, means to force molten metal upwardly through said ingate into said passageway over the circular apex of each of said weirs to fill each of said casting cavities, and means to remove said molten metal from said passageway whereby said weirs will retain molten metal in said casting cavities.
3. The apparatus set out in claim 2 wherein said means to force molten metal comprises a vessel filled with molten metal located below said lower section, an upwardly extending tube communicating with said molten metal and said ingate means, means to exert pressure on said molten metal in said vessel to force molten metal upwardly through said tube into said ingate means and said passageway and wherein said means to remove said molten metal comprises means to reduce said pressure on said molten metal to allow said molten metal in said passageway and said ingate means to return to said tube.
4. The apparatus set out in claim 2 wherein certain of said cores are located along an upwardly extending line through said cavities, and said vent means includes an upwardly extending tube between said cores along said line, said tube being partially defined by a portion of said upper section and by portions of said mold sections.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US79497469A | 1969-01-29 | 1969-01-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3656539A true US3656539A (en) | 1972-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| US794974*A Expired - Lifetime US3656539A (en) | 1969-01-29 | 1969-01-29 | Apparatus for casting molten metal |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4171791A (en) * | 1977-03-14 | 1979-10-23 | Duncan Electric Company | Releasable mold for forming a ribbed transformer casing |
| EP0008858A1 (en) * | 1978-08-04 | 1980-03-19 | Gkn Kent Alloys Limited | Die casting |
| US4235277A (en) * | 1977-12-16 | 1980-11-25 | Hitachi, Ltd. | Method of forming three-dimensional network porous metallic structure having continuous internal cavity |
| DE3247317A1 (en) * | 1982-12-21 | 1984-06-28 | Institut po Metalosnanie i Technologia na Metalite, Sofija | Casting mould |
| US4526222A (en) * | 1982-05-14 | 1985-07-02 | Georg Fischer Aktiengesellschaft | Low pressure casting method and apparatus |
| FR2663572A1 (en) * | 1990-06-22 | 1991-12-27 | Pont A Mousson | LOW PRESSURE METAL SUPPLY METHOD OF CORRESPONDING CAST SAND MOLD, MOLD AND CASTING. |
| FR2663570A1 (en) * | 1990-06-22 | 1991-12-27 | Pont A Mousson | PROCESS, MOLD AND PLANT FOR LOW-PRESSURE MULTI-STAGE METAL CASTING. |
| FR2663571A1 (en) * | 1990-06-22 | 1991-12-27 | Pont A Mousson | METHOD, MOLD AND INSTALLATION FOR METAL CASTING UNDER LOW PRESSURE. |
| US5228495A (en) * | 1989-08-25 | 1993-07-20 | Schwaebische Huettenwerke Gmbh | Process for the manufacture of brake discs |
| US5320160A (en) * | 1988-07-31 | 1994-06-14 | Asahi Katantetsu Kabushiki Kaisha | Casting device, method for using the device, casting device of vehicle wheel, method for using the device, and vehicle wheel |
| US5325905A (en) * | 1990-06-22 | 1994-07-05 | Pont-A-Mousson S.A. | Method and apparatus for multi-stage, low-pressure metal casting |
| CN111001788A (en) * | 2019-12-25 | 2020-04-14 | 云南昆船机械制造有限公司 | Differential low-pressure pouring method for reinforcing by resin sand after core assembly |
| CN113732266A (en) * | 2021-08-20 | 2021-12-03 | 山西江淮重工有限责任公司 | Low-pressure or differential-pressure casting series casting device and method for aluminum alloy shell castings |
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| US2210544A (en) * | 1938-04-18 | 1940-08-06 | Electric Storage Battery Co | Casting |
| US2448903A (en) * | 1944-12-15 | 1948-09-07 | Raymond J Miller | Displacement type casting apparatus |
| US2852822A (en) * | 1955-08-12 | 1958-09-23 | Griffin Wheel Co | Vacuum seal for pressure pouring apparatus |
| US3523570A (en) * | 1964-07-02 | 1970-08-11 | American Standard Inc | Method of press forming thin-walled cast iron parts |
| US3506061A (en) * | 1965-06-10 | 1970-04-14 | Gen Electric | Apparatus for vacuum-casting a plurality of metal parts in a single mold |
| US3532154A (en) * | 1966-09-15 | 1970-10-06 | Inst Po Metalloznanie I Tekno | Method and apparatus for casting utilizing fluid pressure differentials |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4171791A (en) * | 1977-03-14 | 1979-10-23 | Duncan Electric Company | Releasable mold for forming a ribbed transformer casing |
| US4235277A (en) * | 1977-12-16 | 1980-11-25 | Hitachi, Ltd. | Method of forming three-dimensional network porous metallic structure having continuous internal cavity |
| EP0008858A1 (en) * | 1978-08-04 | 1980-03-19 | Gkn Kent Alloys Limited | Die casting |
| US4526222A (en) * | 1982-05-14 | 1985-07-02 | Georg Fischer Aktiengesellschaft | Low pressure casting method and apparatus |
| DE3247317A1 (en) * | 1982-12-21 | 1984-06-28 | Institut po Metalosnanie i Technologia na Metalite, Sofija | Casting mould |
| US5527101A (en) * | 1988-07-31 | 1996-06-18 | Asahi Katantetsu Kabushiki Kaisha | Casting device, method for using the device, casting device of vehicle wheel, method for using the device, and vehicle wheel |
| US5320160A (en) * | 1988-07-31 | 1994-06-14 | Asahi Katantetsu Kabushiki Kaisha | Casting device, method for using the device, casting device of vehicle wheel, method for using the device, and vehicle wheel |
| US5228495A (en) * | 1989-08-25 | 1993-07-20 | Schwaebische Huettenwerke Gmbh | Process for the manufacture of brake discs |
| EP0463911A1 (en) * | 1990-06-22 | 1992-01-02 | Pont-A-Mousson S.A. | Process, mould and device for low-pressure multi-stage casting of metal |
| EP0463909A1 (en) * | 1990-06-22 | 1992-01-02 | Pont-A-Mousson S.A. | Process, mould and device for low pressure metal casting |
| EP0463910A1 (en) * | 1990-06-22 | 1992-01-02 | Pont-A-Mousson S.A. | Process and device for feeding a sand mould with liquid metal using low pressure |
| US5217058A (en) * | 1990-06-22 | 1993-06-08 | Pont-A-Mousson S.A. | Method and apparatus for low-pressure metal casting |
| FR2663571A1 (en) * | 1990-06-22 | 1991-12-27 | Pont A Mousson | METHOD, MOLD AND INSTALLATION FOR METAL CASTING UNDER LOW PRESSURE. |
| FR2663570A1 (en) * | 1990-06-22 | 1991-12-27 | Pont A Mousson | PROCESS, MOLD AND PLANT FOR LOW-PRESSURE MULTI-STAGE METAL CASTING. |
| US5325905A (en) * | 1990-06-22 | 1994-07-05 | Pont-A-Mousson S.A. | Method and apparatus for multi-stage, low-pressure metal casting |
| US5385197A (en) * | 1990-06-22 | 1995-01-31 | Pont-A-Mousson | Method and apparatus for feeding a recessed sand mold with molten metal under low pressure |
| FR2663572A1 (en) * | 1990-06-22 | 1991-12-27 | Pont A Mousson | LOW PRESSURE METAL SUPPLY METHOD OF CORRESPONDING CAST SAND MOLD, MOLD AND CASTING. |
| CN111001788A (en) * | 2019-12-25 | 2020-04-14 | 云南昆船机械制造有限公司 | Differential low-pressure pouring method for reinforcing by resin sand after core assembly |
| CN111001788B (en) * | 2019-12-25 | 2021-09-14 | 云南昆船机械制造有限公司 | Differential low-pressure pouring method for reinforcing by resin sand after core assembly |
| CN113732266A (en) * | 2021-08-20 | 2021-12-03 | 山西江淮重工有限责任公司 | Low-pressure or differential-pressure casting series casting device and method for aluminum alloy shell castings |
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| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: AMSTED INDUSTRIES INCORPORATED, A CORP. OF DE., IL Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST NATIONAL BANK OF CHICAGO, AS AGENT;REEL/FRAME:005070/0731 Effective date: 19880831 |