US186949A - Improvement in cores for casting car-wheels - Google Patents
Improvement in cores for casting car-wheels Download PDFInfo
- Publication number
- US186949A US186949A US186949DA US186949A US 186949 A US186949 A US 186949A US 186949D A US186949D A US 186949DA US 186949 A US186949 A US 186949A
- Authority
- US
- United States
- Prior art keywords
- wheels
- core
- casting
- cores
- improvement
- 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
Links
- 238000005266 casting Methods 0.000 title description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- 239000002184 metal Substances 0.000 description 18
- 229910052751 metal Inorganic materials 0.000 description 18
- 229910052742 iron Inorganic materials 0.000 description 10
- 206010009839 Coeliac disease Diseases 0.000 description 8
- 206010025476 Malabsorption Diseases 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
Definitions
- My invention relates to a core for casting railway-car wheels, the object being to produce a car-wheel which shall have a uniform chill or hardened surface around the tread, as well as to give a more uniform grain or character to the iron-from the hub to the rim.
- my invention consists of acentral core provided with two inclined gates or holes, into which the molten iron is poured to form the wheel, and by means of which the molten iron is prevented from passing directly to the chill, and is caused to dow down upon the sand, and is thereby more ⁇ uniformly cooled throughout the entire casting.
- Figure 1 is a vertical central section through the core, showing a portionof the mold upon which the core rest-s, and also a portion ofthe hub of the wheel.
- C represents a part of the lower portion of the. mold, which may be slightly recessed at c to receive the core A, and upon which the latter rests, and the core A is cylindrical, and provided with the two holes or gates c c, extending from the central part of the upper end of the core downward in an oblique direction to the outside of the core; and the latter may be provided with any desired number ot' vent-holes, a, to conduct away the gases during the process of casting.
- the method of casting wheels by pouring the molten iron into the mold at D, forming the sprues on the outside of the hub B, is also objectionable, because that part of the hub is left rough and unsightly after the sprues are broken olf and in casting, just after the metal is poured, the iron in the sprues congeals too rapidly, as they are not surrounded or heated by the molten metal, and the iron in that part of the hub shrinks and becomes honey-combed during the cooling, so that the hub is not solid, or of the same grain or character as the other parts of the wheel.
- the molten metal is poured in .at the upper end of the core, and, passing down the holes c, its flow is directly against the sand of the mold, and the metal then gradually and uni-A formly Hows out in every direction against the chill, and the metal cools more uniformly, so that the result is a wheelof uniform grain or character throughout, and with the tread ⁇ hardened or chilled of a uniform thickness all around; and these qualities give to the wheel a much greater degree of durability and less liability to fracture from a sudden jar or
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
A W. H. P-AIGE.
NG CAR-WHEELS.
. Ewan/07M UNITED STATES PATENT OFFICE WILLIAM H. PIAIGE, OF SPRINGFIELD, MASSAGEIUSETTS.
IMPROVEMENT IN CORES FOR CASTING CAR-WHEELS.v
Specification forming part of Letters Patent No. 186,949, dated February 6, 1877; application tiled December 13, 1876.
To all whom it may concern:
Be it known that I, WILLIAM H. PAIGE, of Springfield, in the State of Massachusetts, have invented a new and useful Improvement in Cores for Casting Railway Car Wheels; and that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, and to the letters of reference marked thereon.
My invention relates to a core for casting railway-car wheels, the object being to produce a car-wheel which shall have a uniform chill or hardened surface around the tread, as well as to give a more uniform grain or character to the iron-from the hub to the rim. To this end my invention consists of acentral core provided with two inclined gates or holes, into which the molten iron is poured to form the wheel, and by means of which the molten iron is prevented from passing directly to the chill, and is caused to dow down upon the sand, and is thereby more` uniformly cooled throughout the entire casting.
Figure 1 is a vertical central section through the core, showing a portionof the mold upon which the core rest-s, and also a portion ofthe hub of the wheel. A
In the drawings, C represents a part of the lower portion of the. mold, which may be slightly recessed at c to receive the core A, and upon which the latter rests, and the core A is cylindrical, and provided with the two holes or gates c c, extending from the central part of the upper end of the core downward in an oblique direction to the outside of the core; and the latter may be provided with any desired number ot' vent-holes, a, to conduct away the gases during the process of casting.
1n all the processes of casting car-wheels nowv practiced with horizontal gates in a central tubular core, the weight of the metal,-
` when poured into the core, forces the metal through said horizon tal gates directly against the chill at the periphery during the whole process of casting, and the consequence is that the chill becomes unduly heated at the points opposite the horizontal gates by the -constant ow of molten metal toward and against it, and as those parts of the wheel opposite the gates retain the heat the longest, the tread of the wheel opposite the gates is found to be insufficiently chilled, and wears away very fast and easily, while those parts of the tread at all other points are found to be too much chilled, as compared with those parts at the two points mentioned, owing to the less agitation of the molten metal, and thus being the more readily cooled.
The method of casting wheels by pouring the molten iron into the mold at D, forming the sprues on the outside of the hub B, is also objectionable, because that part of the hub is left rough and unsightly after the sprues are broken olf and in casting, just after the metal is poured, the iron in the sprues congeals too rapidly, as they are not surrounded or heated by the molten metal, and the iron in that part of the hub shrinks and becomes honey-combed during the cooling, so that the hub is not solid, or of the same grain or character as the other parts of the wheel.
By the use of my invention, however, the
sprues are formed on the inside of the hub,
and the hole left by the core is roamed out and made smooth to t the axle.
ln the use of the core A in casting wheels the molten metal is poured in .at the upper end of the core, and, passing down the holes c, its flow is directly against the sand of the mold, and the metal then gradually and uni-A formly Hows out in every direction against the chill, and the metal cools more uniformly, so that the result is a wheelof uniform grain or character throughout, and with the tread` hardened or chilled of a uniform thickness all around; and these qualities give to the wheel a much greater degree of durability and less liability to fracture from a sudden jar or
Publications (1)
Publication Number | Publication Date |
---|---|
US186949A true US186949A (en) | 1877-02-06 |
Family
ID=2256356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US186949D Expired - Lifetime US186949A (en) | Improvement in cores for casting car-wheels |
Country Status (1)
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US (1) | US186949A (en) |
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- US US186949D patent/US186949A/en not_active Expired - Lifetime
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