US1175555A - Art of casting metal. - Google Patents

Description

Patented Mar. 14, 1916.

WESLEY G. NICHOLS, OF CHICAGO HEIGHTS, ILLINOIS,- ASSIGNOR TO AMERICAN MAN- GANESE STEEL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

ART or oasrnve METAL.

Specification of Letters Patent.

Patented. Mar. 14, 191%.

Application filed- January 3, 1916. Serial No. 69,830.

To all whom it may concern:

Be it known that I, WVEsLnY G. NICHOLS, a citizen of the United States, and resident of Chicago Heights, in the county of Cook and State of Illinois, have invented. certain ndw and useful Improvements in the Art of Casting Metahof which the following is a specification.

My invention relates to the art of casting metal and has particular reference to a novel riser formation.

In the making of steel castings, particularly castings of large size, it is common to provide risers or bodies of metal extending considerably above the casting and designed to provide a head of metal to the end that density in the casting shall be produced. This head of metal is a source of annoyance from a foundrymans standpoint, due to the fact that it may be of any diameter up to thirty or forty inches according to the size of the castings to be produced and must be broken in some manner preferably under the drop or skull cracker, before it can be remelted. In the formation of manganese steel castings great difliculty is experienced i. breaking theserisers. To that end I have provided means whereby the riser may be sub-divided into segments during its formation, all without interfering with the efficiency thereof or without limiting the size of the riser. The result is secured by providing a thin core, or diaphragm, of core material, the same being placed vertically transversely of the opening for the riser, with the result that as the metal rises in the space it is divided by the diaphragm without interfering in any way with the efficiency of the riser. If the riser is of a diameter of.ten inches or less, I have found a single division plate or diaphragm sufficient. However, for a larger riser I provide two division plates located at an angle of 90 to each otherwhereby the riser is divided into four sections. I

The invention will be more readily understood by reference to the accompanying drawings, Wherein Figure 1 is a vertical sectional View of a fragment of a mold and the riserto which my invention has been applied; Fig. 2 is an enlarged elevation of the riser after it has been severed from the casting; Fig. 3 is a plan view of the'construction shown in Fig.

2; Fig. 4 is a View similar to Fig. 2, showing a riser having but one division plate, and Fig. 5 is a plan view of the construction shown in Fig. 4.

Referring more particularly to the drawings, it will be seen that I provide a mold 10 within which a casting 11 has been formed. Within a mold 12, superposed on the mold 10 I provide a cavity for the accommoda tion of the riser 13. Mounted within the mold 12 with their edges retained in the sand 14 of the mold are division plates or diaphragms 15, 16, located vertically at an angle of ninety degrees to each other, where- 'by the space for the accommodation of the riser is divided into four segmental spaces. The division plates 15 may be formed in two parts, if desired, and merely abut the division plates 16. As ,the metal is poured for the formation of the casting it will rise in the space occupied by the division plates and be formed in four segments. After the riser has been separated from the casting these segments may be readily disconnected from each other by a wedge and a sledge hammer and in that condition may be re-- turned to the furnace for re-melting.

In the construction shown in Figs. 4 and 5, the riser 17 is divided by only a single plate 18. This, as stated, may be found sufiicient in risers of small size.

While. I have shown the invention in certain forms in the drawings, it will be understood that it may be varied by the provision of a larger number of division ,plates, if desired, or the division may be made in difl'erent ways from that shown. Such variations as are within the scope ofmy claims I consider Within the spirit of my invention.

I claim:

1. In a device for molding, the combina tion of a mold for a casting, a riser mold superposed thereon and a division plate dividing the casting space in said riser mold into a plurality of parts, substantially as described.

2. A riser mold providing a casting space and a diaphragm of refractory material dividing said casting space into a plurality of smaller spaces, substantially as described.

Q 1 r nsom 3. A mold for the formation of risers on Signed at Chicago Heights, Illinois, this castings, comprising in combination a shell 30th day of December, 1915.

adapted to provide a casting space, and a- WESLEY Gr. NICHOLS. vertical division plate of refractory material I Witnesses: 5 dividing 'said casting space into a plurality M. 1. LA ZELLE,

of smaller spaces, substantially as described. CHARLES FAIILsTRoM.

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