US974934A - Method of casting metal. - Google Patents

Description

Patented Nov. 8, 1910.

m n MM Mm 0 m an i/ A J WITNESSES )w-fl 1 the air and gases to ex fact that the volume remove the rough exterior surfaces thereof,

PAaiEN'r orrron.

CHARLES H. UPSON, OF WATERIBUBY, CONNECTICUT} mn'rnon or oas'rnm METAL. I

Application filed April 28, 1908, Serial No. 429,751. Renewed April 9, 1910.

To all whom it may concern:

Be it known that I, CHARLES H. UPSON, a citizen of the United States, and a resident of lvaterbury, in the county of New Haven and State of Connecticut, have made and invented certain new and useful Improvements in Methods of Casting Metal, of which the following is a specification.

My invention relates to an improved method of pouring, casting or molding bars, ingots, or articles of brass and other metals.

The method now in common use is to utilize or employ a sectional mold, the sections being held together in their proper relative positions by means of metal bands or rings surrounding the same, and wedges located between said bands and molds, or by means of bolts, the to of the mold being open to allow the meta to be poured into the same, the bottom of the inold containing a remov able plug to permit the bar or casting to be removed after the metal has properly 'set orcooled, the molds being first thoroughly oiled, and set or placed in an upright position. In casting the ingots or bars in these molds, the heat of the molten metal causes and, and in so doing, most of such air an gas will escape out and through the molten metal and top of the mold. Frequently, however, a part'of such will remain in the metal, due to the thereof is so small that it is insuflicient to force a passage through the metal, the pocketed or confined air and gas causing the formation of in holes in the metal, and necessitating in al instances, the overhauling of the bars or castings in machines provided with scrapers or nives, to

im order to determine the imperfect bars.

I have found by experiment that increas. ing the volume or sup illy of air to the molten perfect and the overcomes a f the formation of Specification of Letters Patent.

.- as instead of metal while pouring t e same into the mold,

1 danger 0 these pin holes, the air being supplied under Patented Nov. 8, 1910.

Serial No. 554,529.

pressure from "any suitable source, the increased'volume thereof rendering it capable of forcing its way out through the soft 'metal, and resulting in a solid, smooth and homogeneous casting.

This process, it will of "course be understood, isnot in any way limited to any peculiar type or shape of mold, it being applicable to any and all the diiferent forms invention to the to be supplied, to force a current thereof; nor do I limit my quantity or volume of air it being simply necessary thereof from the top of the mold to the bottal or mixture tom during the time the m is being poured, thereby su plying a suiticient volume to permit of its escape and the escape of the gases which would otherwise be confined in the metal.

For the sake of illustration, Ihave shown in the accompanying drawing an ordinary form of mold wherein- Fig. I is a perspective view of the, same, and Fig. II a vertical sectional view.

As before stated, this mold consists of the two sections A-B held together in their proper relative positions by means of the ,metal bands or straps C, the latter being tightened by means of the wedges D, the top 0 i said .mold being open and the bottom thereof closed. Over the open top of the mold is located the pipe E connected with any suitable source of' air under pressure, that portion of the pipe extending over and above the mold being perforated in order to 8 deliver the air into the moldas the metal is poured therein.

I am aware that others have attempted to effect the same result by the use of (lo-oxidizing gases as for instance, by injecting into the mold ordinary illuminating gas, such freeing the mold and metal of the oxygen therein. Such'methods, however, are quite the reverse of the one hereinabove described,

is my aim and purpose to supply this gas thereto in order that there may be a sufficient freeing the metal of oxygen, it 9 quantity of oxygen, or air containing the oxygen, to unite with the gas or gases already present to render them inflammable.

,- Having fully described my invention, what 5 I claim as new, and desire to secure by Letters Patent, is

1. The method hereinbefore described of castingmetal, consisting in sun lying air under pressure to the metal whi e pouring.

10 the same.

2. The method hereinbefore described of casting metal, consisting in forcin air under i pressure into a mold simultaneous y with'the pouring of the molten metal therein.

Signed at Water-ville, borough. of Water- 15 bug, in the county of New Haven and State of onnecticut, th s 25th day of April, A. D.

CHARLES H, UPSON. Witnesses i ,H. L. Ema,

E. A. Fimncn.

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