US3498366A - Graphite mold having resin-bonded sand portions - Google Patents

Graphite mold having resin-bonded sand portions Download PDF

Info

Publication number
US3498366A
US3498366A US570628A US3498366DA US3498366A US 3498366 A US3498366 A US 3498366A US 570628 A US570628 A US 570628A US 3498366D A US3498366D A US 3498366DA US 3498366 A US3498366 A US 3498366A
Authority
US
United States
Prior art keywords
mold
resin
sand
cavity
bonded sand
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US570628A
Inventor
Robert Edward Merrick
Donald Christensen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amsted Industries Inc
Original Assignee
Amsted Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amsted Industries Inc filed Critical Amsted Industries Inc
Application granted granted Critical
Publication of US3498366A publication Critical patent/US3498366A/en
Assigned to FIRST NATIONAL BANK OF CHICAGO, THE reassignment FIRST NATIONAL BANK OF CHICAGO, THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMSTED INDUSTRIES INCORPORATED
Anticipated expiration legal-status Critical
Assigned to AMSTED INDUSTRIES INCORPORATED, A CORP. OF DE. reassignment AMSTED INDUSTRIES INCORPORATED, A CORP. OF DE. RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: FIRST NATIONAL BANK OF CHICAGO, AS AGENT
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C21/00—Flasks; Accessories therefor
    • B22C21/12—Accessories
    • B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/068—Semi-permanent moulds

Definitions

  • This invention relates to molds suitable for use in forming metal castings and more particularly to molds adapted for use with pressure pouring apparatus in which molten metal is forced upwardly under pressure through an ingate and into the bottom of a mold cavity.
  • Such molds have been proposed and are presently being used commercially to produce cast iron and steel wheels. These molds are also used to produce cast iron mullers. Cast wheels and mullers have been successfully manufactured in existing mold equipment. However, in the production of cast iron mullers with present mold equipment certain drawbacks have been found to exist. The plate portions of the mullers produced in existing molds require additional finishing operations to provide the desired surface finish. In addition, gas holes may be found in the muller, which must be removed.
  • Another object of this invention is to provide a mold for pressure pouring cast iron articles, which articles have improved surface characteristics.
  • a further object of this invention is to provide mold equipment for pressure pouring cast iron mullers.
  • Another object of this invention is to provide a mold for cast iron mullers from a single iron composition, wherein the muller is provided with a chilled tread wearing surface and a machinable plate portion.
  • FIGURE 1 is an elevational view in cross section of mold apparatus according to this invention.
  • FIGURE 2 is a cross-sectional view of the mold apparatus taken along the plane of line 22 of FIGURE 1.
  • reference numeral denotes a mold which comprises a graphite cope 12 and a graphite drag 14 which define therebetween a casting cavity 16 suitable for casting iron mullers or other cast iron or steel articles.
  • the drag 14 is provided with an ingate 18 through which molten metal is forced upwardly under pressure into the bottom of the hub portion of the casting cavity 16 in the conventional pressure pouring procedure.
  • the ingate 18 is coaxial with the cavity and it is formed at its upper end with a frustoconical seat 20 for engagement with a stopper 22.
  • the stopper 22 comprises a stem 24 extending from outside of the cope 12 and terminating at its lower end in a stopper portion 26 having a frustoconical surface 28 for engagement with the frustoconical surface 20 of the ingate.
  • the stopper 22 is utilized to terminate flow of molten metal into the casting cavity 16 and to provide means for removing the casting from the mold after at least partial solidification.
  • the stopper 22 is provided with a cylindrical resinbonded sand portion 126 which rests upon the stopper portion 26. This cylindrical portion 126 is retained in place by a washer 128.
  • the cope 12 is formed with coaxial bores 30 and 32 which merge with an intermediate annular downwardly facing shoulder 34 to receive a porous resin-bonded sand head 36 having a concave lower surface 38 to define with the bore 32 a hub riser cavity 40.
  • the lower end of the sand head 38 is spaced up: wardly from the lower end 42 of the bore 32 to leave a cylindrical graphite wall below the head to serve as a freeze-off to permit quick pickup of the cast muller without disengaging the stopper stem 24 from the muller.
  • a metallic washer 44 is embedded within the lower end of the sand head 38.
  • the washer 44 and head 38 are provided with coaxial openings 46 and 48, respectively, to snugly receive therein the stopper stem 24.
  • the upper portion of the cope 12 is provided with a third bore 50 which is coaxial with bores 32 and 30 and is adapted to snugly receive a metallic guide spider 52 having concentric rings 54 and 56 interconnected by radial ribs 58.
  • the inner ring 56 is formed with a bore 60 terminating at its lower end in a shoulder 62 to receive therein the lower end of a fiberboard tube 64.
  • the stopper stem 24 extends upwardly through the tube 64 and is detachably engaged against movement relative thereto by means of a staple 66 which serves to clamp opposite sides of the tube against the stem 24 when the stopper 22 is held in its raised and open position. Means, not shown, are provided on the upper end of the stopper stem 24 to engage a lifting device which may be utilized to remove the casting from the mold cavity 16.
  • the cope 12 is provided with a plurality of circumferentially spaced gas ports 68 which extend axially therethrough and are disposed inwardly and radially from the tread portion of the casting cavity 16.
  • Three of the gas holes 68 are provided with a press-in steel sleeve 70. These holes are positioned 120 from each other.
  • a riser bore 72 In radial alignment with the gas holes 68 is a riser bore 72.
  • the riser bore 72 is provided with a cylindrically shaped liner 74 formed of resin-bonded sand.
  • the drag 14 is provided with a plurality of circumferentially spaced vent holes 76.
  • the vent holes 76 are spaced outwardly from the ingate 18 and inwardly from the tread portion of the casting cavity 16. In the illustrated embodiment they are in vertical alignment with gas holes 68. This is the preferred embodiment.
  • Three equally spaced vent holes 76 are provided with enlarged portions 78 at their upper ends to receive therein a chaplet 80, the function of which will be explained hereinafter.
  • the upper surface of the drag 14, which is that portion which defines the plate portion of the cast muller, is machined to provide a recess 82. This recess 82 surrounds the ingate 18 and extends radially outwardly therefrom into close proximity to the tread forming portion 84 of the drag 14.
  • the recess 82 is provided with two circumferential grooves 86 and 88 to anchor the sand 90 in the recess 82. These grooves 86 and 88 and the recess 82 are filled with resin-bonded sand 90 which sand forms the plate casting portion 92 of the drag 14.
  • the cope 12 is provided with a recess 94 similar to the recess 82 of the drag 14.
  • the recess 94 extends radially outwardly from close proximity to the lower end 42 of the bore 32 to close proximity to the thread forming portion 95 of the cope 12.
  • Circumferential grooves 96 and 98 are provided to aid in anchoring the resin-bonded sand 100, which is placed in the recess 94 and grooves 96 and 98.
  • the sand liner 100 is provided with a riser sprue opening 102 in vertical alignment with the riser opening 72.
  • the sand liner 100 is also provided with three openings 104 in vertical alignment with the three steel sleeves 70 which openings'104 areadapted'to' receive therein a core leg 106, the function of which will be explained hereinafter.
  • a pan core 108 is centered with respect to the cavity 16 of the mold 10.
  • the pan core 108 is constructed of oil-bonded sand and baked in a core oven in a conventional manner and is tire-shaped in configuration, which is the conventional construction for such an item. It is provided with a continuous circular vent 110 in the center thereof, which vent is in open communication with three vertical vent passages 112, only one of which is shown in FIGURE 1. The other two are 120 apart from each other and the vent passage as shown.
  • the vent passages 112 are in open communication with an opening 114 in the upper surface 116 of the pan core 108.
  • openings 114 are adapted to receive therein the lower portion of the core legs 106 which are provided with a vertical opening 118 in order that gases generated within the pan core may escape through the steel sleeves 70.
  • the undersurface 120 of the pin core 108 provided with a plurality of openings 122 to receive therein the upper portion 124 of the chaplets 80.
  • the chaplets 80 and core legs 106 serve to position the pan core 108 within the mold cavity 16.
  • molten metal in the conventional pressure pouring technique is forced upwardly through the ingate 18 in to the mold cavity 16 until the cavity is filled with molten metal.
  • the stopper 22 is then moved into position with its conical surface 28 abutting the conical surface 20 of the ingate, thereby preventing the metal within the mold from returning to the ladle through the ingate 18 and also preventing additional metal from flowing into the mold cavity.
  • the gases generated within the cavity 16 during the pouring and solidification of the casting escape through the riser 72.
  • the gases generated within the pan core 108 ascape through the three steel sleeves 70.
  • the remaining openings 68 and 76 are utilized to permit escape of gases from resin-bond sand 90 and 100. The gases are then burned off in the conventional manner.
  • cope 12 is lifted off of the drag 14 in the conventional manner.
  • the muller may then be removed by lifting the stopper 22. Thereafter the muller is cooled in the conventional manner.
  • a mold for casting ferrous articles comprising a cope and a drag defining therebetween a casting cavity, a riser cavity in said cope, a gate in said drag, said drag and cope having the plate forming portions thereof formed of resin-bonded sand, and the remainder of the molding portions of said cope and drag being formed of graphite.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Casting Devices For Molds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

Much 7 R. E. MERRICK ETAL 3,498,366 GRAPHITE now HAVING RESIN-BONDED SAND Pon'rxous Filed a 5. 1966 "United States Patent US. Cl. 164-368 4 Claims ABSTRACT OF THE DISCLOSURE A graphite mold for casting ferrous articles having a portion thereof formed of resin-bonded sand to provide improved surface conditions of the cast articles and to produce articles having chilled wear surfaces at the graphite contacting portions thereof and softer surfaces at the sand contacting portions thereof.
This invention relates to molds suitable for use in forming metal castings and more particularly to molds adapted for use with pressure pouring apparatus in which molten metal is forced upwardly under pressure through an ingate and into the bottom of a mold cavity.
Such molds have been proposed and are presently being used commercially to produce cast iron and steel wheels. These molds are also used to produce cast iron mullers. Cast wheels and mullers have been successfully manufactured in existing mold equipment. However, in the production of cast iron mullers with present mold equipment certain drawbacks have been found to exist. The plate portions of the mullers produced in existing molds require additional finishing operations to provide the desired surface finish. In addition, gas holes may be found in the muller, which must be removed.
It is, therefore, an object of the present invention to provide a new and improved mold apparatus for use in pressure pouring cast iron and steel articles.
Another object of this invention is to provide a mold for pressure pouring cast iron articles, which articles have improved surface characteristics.
A further object of this invention is to provide mold equipment for pressure pouring cast iron mullers.
Another object of this invention is to provide a mold for cast iron mullers from a single iron composition, wherein the muller is provided with a chilled tread wearing surface and a machinable plate portion.
FIGURE 1 is an elevational view in cross section of mold apparatus according to this invention; and
FIGURE 2 is a cross-sectional view of the mold apparatus taken along the plane of line 22 of FIGURE 1.
Referring now to the drawing, reference numeral denotes a mold which comprises a graphite cope 12 and a graphite drag 14 which define therebetween a casting cavity 16 suitable for casting iron mullers or other cast iron or steel articles.
The drag 14 is provided with an ingate 18 through which molten metal is forced upwardly under pressure into the bottom of the hub portion of the casting cavity 16 in the conventional pressure pouring procedure. The ingate 18 is coaxial with the cavity and it is formed at its upper end with a frustoconical seat 20 for engagement with a stopper 22. The stopper 22 comprises a stem 24 extending from outside of the cope 12 and terminating at its lower end in a stopper portion 26 having a frustoconical surface 28 for engagement with the frustoconical surface 20 of the ingate. The stopper 22 is utilized to terminate flow of molten metal into the casting cavity 16 and to provide means for removing the casting from the mold after at least partial solidification.
The stopper 22 is provided with a cylindrical resinbonded sand portion 126 which rests upon the stopper portion 26. This cylindrical portion 126 is retained in place by a washer 128.
The cope 12 is formed with coaxial bores 30 and 32 which merge with an intermediate annular downwardly facing shoulder 34 to receive a porous resin-bonded sand head 36 having a concave lower surface 38 to define with the bore 32 a hub riser cavity 40. It will be noted that the lower end of the sand head 38 is spaced up: wardly from the lower end 42 of the bore 32 to leave a cylindrical graphite wall below the head to serve as a freeze-off to permit quick pickup of the cast muller without disengaging the stopper stem 24 from the muller. Preferably a metallic washer 44 is embedded within the lower end of the sand head 38. The washer 44 and head 38 are provided with coaxial openings 46 and 48, respectively, to snugly receive therein the stopper stem 24.
The upper portion of the cope 12 is provided with a third bore 50 which is coaxial with bores 32 and 30 and is adapted to snugly receive a metallic guide spider 52 having concentric rings 54 and 56 interconnected by radial ribs 58. The inner ring 56 is formed with a bore 60 terminating at its lower end in a shoulder 62 to receive therein the lower end of a fiberboard tube 64. The stopper stem 24 extends upwardly through the tube 64 and is detachably engaged against movement relative thereto by means of a staple 66 which serves to clamp opposite sides of the tube against the stem 24 when the stopper 22 is held in its raised and open position. Means, not shown, are provided on the upper end of the stopper stem 24 to engage a lifting device which may be utilized to remove the casting from the mold cavity 16.
The cope 12 is provided with a plurality of circumferentially spaced gas ports 68 which extend axially therethrough and are disposed inwardly and radially from the tread portion of the casting cavity 16. Three of the gas holes 68 are provided with a press-in steel sleeve 70. These holes are positioned 120 from each other. In radial alignment with the gas holes 68 is a riser bore 72. The riser bore 72 is provided with a cylindrically shaped liner 74 formed of resin-bonded sand.
The drag 14 is provided with a plurality of circumferentially spaced vent holes 76. The vent holes 76 are spaced outwardly from the ingate 18 and inwardly from the tread portion of the casting cavity 16. In the illustrated embodiment they are in vertical alignment with gas holes 68. This is the preferred embodiment. Three equally spaced vent holes 76 are provided with enlarged portions 78 at their upper ends to receive therein a chaplet 80, the function of which will be explained hereinafter. The upper surface of the drag 14, which is that portion which defines the plate portion of the cast muller, is machined to provide a recess 82. This recess 82 surrounds the ingate 18 and extends radially outwardly therefrom into close proximity to the tread forming portion 84 of the drag 14. The recess 82 is provided with two circumferential grooves 86 and 88 to anchor the sand 90 in the recess 82. These grooves 86 and 88 and the recess 82 are filled with resin-bonded sand 90 which sand forms the plate casting portion 92 of the drag 14.
The cope 12 is provided with a recess 94 similar to the recess 82 of the drag 14. The recess 94 extends radially outwardly from close proximity to the lower end 42 of the bore 32 to close proximity to the thread forming portion 95 of the cope 12. Circumferential grooves 96 and 98 are provided to aid in anchoring the resin-bonded sand 100, which is placed in the recess 94 and grooves 96 and 98. The sand liner 100 is provided with a riser sprue opening 102 in vertical alignment with the riser opening 72. The sand liner 100 is also provided with three openings 104 in vertical alignment with the three steel sleeves 70 which openings'104 areadapted'to' receive therein a core leg 106, the function of which will be explained hereinafter. v I
A pan core 108 is centered with respect to the cavity 16 of the mold 10. The pan core 108 is constructed of oil-bonded sand and baked in a core oven in a conventional manner and is tire-shaped in configuration, which is the conventional construction for such an item. It is provided with a continuous circular vent 110 in the center thereof, which vent is in open communication with three vertical vent passages 112, only one of which is shown in FIGURE 1. The other two are 120 apart from each other and the vent passage as shown. The vent passages 112 are in open communication with an opening 114 in the upper surface 116 of the pan core 108. These openings 114 are adapted to receive therein the lower portion of the core legs 106 which are provided with a vertical opening 118 in order that gases generated within the pan core may escape through the steel sleeves 70. The undersurface 120 of the pin core 108 provided with a plurality of openings 122 to receive therein the upper portion 124 of the chaplets 80. The chaplets 80 and core legs 106 serve to position the pan core 108 within the mold cavity 16.
In operation, molten metal in the conventional pressure pouring technique is forced upwardly through the ingate 18 in to the mold cavity 16 until the cavity is filled with molten metal. The stopper 22 is then moved into position with its conical surface 28 abutting the conical surface 20 of the ingate, thereby preventing the metal within the mold from returning to the ladle through the ingate 18 and also preventing additional metal from flowing into the mold cavity. The gases generated within the cavity 16 during the pouring and solidification of the casting escape through the riser 72. The gases generated within the pan core 108 ascape through the three steel sleeves 70. The remaining openings 68 and 76 are utilized to permit escape of gases from resin-bond sand 90 and 100. The gases are then burned off in the conventional manner.
After at least partial solidification of the muller, the
cope 12 is lifted off of the drag 14 in the conventional manner. The muller may then be removed by lifting the stopper 22. Thereafter the muller is cooled in the conventional manner.
It has been found that by casting mullers utilizing the mold of this invention having the plate surface of the mold formed substantially of resin-bonded sand, the mullers are superior in quality to those obtained in conventional sand molds. While the preferred embodiment of this invention has been described herein before, it should be understood that various modifications may be made in the same without departing from the spirit and scope of the following claims.
We claim:
1. A mold for casting ferrous articles comprising a cope and a drag defining therebetween a casting cavity, a riser cavity in said cope, a gate in said drag, said drag and cope having the plate forming portions thereof formed of resin-bonded sand, and the remainder of the molding portions of said cope and drag being formed of graphite.
2. A mold according to claim 1 wherein said cope and drag are provided with a plurality of gas venting passages.
3. A mold according .to claim 2 wherein said gas venting passages are arranged in a circle and are equally spaced from adjacent passages.
4. A mold according to claim 1 wherein a sand core is positioned within said cavity and spaced from said plate forming and molding portions.
References Cited UNITED STATES PATENTS 1,943,434 1/1934 Hemstead et al. 24956 X 2,838,816 6/1958 Strorn 24956 3,302,919 2/1967 Beetle et al. 164-340 X 2,765,505 10/1956 Sylvester 16427 2,886,865 5/1959 Leisk 16422 J. SPENCER OVERHOLSER, Primary Examiner US. Cl. X.R. 164-125
US570628A 1966-08-05 1966-08-05 Graphite mold having resin-bonded sand portions Expired - Lifetime US3498366A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US57062866A 1966-08-05 1966-08-05

Publications (1)

Publication Number Publication Date
US3498366A true US3498366A (en) 1970-03-03

Family

ID=24280408

Family Applications (1)

Application Number Title Priority Date Filing Date
US570628A Expired - Lifetime US3498366A (en) 1966-08-05 1966-08-05 Graphite mold having resin-bonded sand portions

Country Status (5)

Country Link
US (1) US3498366A (en)
BE (1) BE701810A (en)
DE (1) DE1583520A1 (en)
ES (1) ES343820A1 (en)
GB (1) GB1133029A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5238216A (en) * 1991-08-30 1993-08-24 Amsted Industries Incorporated Apparatus for modifying thermal gradient for casting in graphite molds
WO2012048413A1 (en) * 2010-10-12 2012-04-19 Fonderie Saguenay Ltee Method and apparatus for machining molding elements for foundry casting operations
CN102773419A (en) * 2012-07-31 2012-11-14 吴江信谊精密五金有限公司 Elevator traction sheave mould
CN103042193A (en) * 2012-12-21 2013-04-17 浙江今飞凯达轮毂股份有限公司 Hub sand core and low-pressure casting hub die

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3323697C1 (en) * 1983-07-01 1985-02-28 Gerhard 5905 Freudenberg Müller-Späth Process for producing a casting in a casting mold
JPS6453755A (en) * 1987-08-21 1989-03-01 Honda Motor Co Ltd Low pressure casting method for light alloy casting
US4875518A (en) * 1987-08-21 1989-10-24 Honda Giken Kogyo Kabushiki Kaisha Method of and apparatus for low-pressure casting of light metal alloy
CN102699310B (en) * 2012-06-08 2014-06-11 天津立中车轮有限公司 Low-pressure casting hub exhaust system and casting method
CN110510490B (en) * 2019-09-24 2021-10-26 扬州大学 Special combined type roller for elevator, roller machining device and roller machining method capable of being used within large temperature range

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1943434A (en) * 1931-01-29 1934-01-16 Ralph C Hempstead Apparatus for molding cast wheels
US2765505A (en) * 1952-06-03 1956-10-09 Griffin Wheel Co Forming riser openings
US2838816A (en) * 1955-09-14 1958-06-17 Griffin Wheel Co Permanent mold with sand dome
US2886865A (en) * 1955-04-21 1959-05-19 American Steel Foundries Apparatus for and method of making composite molds
US3302919A (en) * 1965-11-12 1967-02-07 Abex Corp Apparatus for casting metal wheels

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1943434A (en) * 1931-01-29 1934-01-16 Ralph C Hempstead Apparatus for molding cast wheels
US2765505A (en) * 1952-06-03 1956-10-09 Griffin Wheel Co Forming riser openings
US2886865A (en) * 1955-04-21 1959-05-19 American Steel Foundries Apparatus for and method of making composite molds
US2838816A (en) * 1955-09-14 1958-06-17 Griffin Wheel Co Permanent mold with sand dome
US3302919A (en) * 1965-11-12 1967-02-07 Abex Corp Apparatus for casting metal wheels

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5238216A (en) * 1991-08-30 1993-08-24 Amsted Industries Incorporated Apparatus for modifying thermal gradient for casting in graphite molds
WO2012048413A1 (en) * 2010-10-12 2012-04-19 Fonderie Saguenay Ltee Method and apparatus for machining molding elements for foundry casting operations
US8844606B2 (en) 2010-10-12 2014-09-30 Nopatech Inc. Method and apparatus for machining molding elements for foundry casting operations
CN102773419A (en) * 2012-07-31 2012-11-14 吴江信谊精密五金有限公司 Elevator traction sheave mould
CN103042193A (en) * 2012-12-21 2013-04-17 浙江今飞凯达轮毂股份有限公司 Hub sand core and low-pressure casting hub die
CN103042193B (en) * 2012-12-21 2014-10-29 浙江今飞凯达轮毂股份有限公司 Hub sand core and low-pressure casting hub die

Also Published As

Publication number Publication date
GB1133029A (en) 1968-11-06
ES343820A1 (en) 1968-10-01
BE701810A (en) 1968-01-02
DE1583520A1 (en) 1970-08-20

Similar Documents

Publication Publication Date Title
US2379401A (en) Method and apparatus for casting metal
US3253307A (en) Method and apparatus for regulating molten metal teeming rates
US4154289A (en) Gating system
US3498366A (en) Graphite mold having resin-bonded sand portions
CA2145368C (en) Mold and method for casting a disk brake rotor
US9884362B2 (en) Method and system for manufacturing a wheel
US2838816A (en) Permanent mold with sand dome
CN101530893A (en) Gating system for light alloy castings of wheels
US5238216A (en) Apparatus for modifying thermal gradient for casting in graphite molds
CN100548536C (en) The regression formula pouring procedure of casting train wheel
US2761201A (en) Renewing molds
US2792606A (en) Method for making castings
US2431879A (en) Apparatus for casting steel rolls
US2765505A (en) Forming riser openings
US2239381A (en) Mold for making hollow cast metal valves
US1777673A (en) Car-wheel manufacture
USRE24655E (en) Forming riser openings
US2314839A (en) Casting metal
US1774687A (en) Process of metal casting
GB726355A (en) Improvements in a method of making castings
US2770855A (en) Apparatus for making liner sleeves and refractory shell type molds
US3729049A (en) Slipping cope assembly
US2819501A (en) Wheel mold
US1003709A (en) Car-wheel molding and casting flask.
US2085015A (en) Casting method

Legal Events

Date Code Title Description
AS Assignment

Owner name: FIRST NATIONAL BANK OF CHICAGO, THE,ILLINOIS

Free format text: SECURITY INTEREST;ASSIGNOR:AMSTED INDUSTRIES INCORPORATED;REEL/FRAME:004666/0778

Effective date: 19860227

Owner name: FIRST NATIONAL BANK OF CHICAGO, THE, ONE FIRST NAT

Free format text: SECURITY INTEREST;ASSIGNOR:AMSTED INDUSTRIES INCORPORATED;REEL/FRAME:004666/0778

Effective date: 19860227

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