US2803862A - Chill - Google Patents

Description

Aug. 27, 1957 Q RAIBLE 2,803,862

CHILL Filed Feb. 1 12, 1953 INVENTOR. CHARLES 6. RA IBL E H/S ATTOP/VEY United States Patent CHILL Charles G. Raible, Chesterland, Ohio Application February 12, 1953, Serial No. 336,602

1 Claim. (Cl. 22-174) This invention relates to chills used in metal casting, and more particularly to a fabricated radius chill.

In casting metal forms of more or less intricate shapes, it is customary, particularly when the cast metal is steel, to use a chill at the various corners to prevent cracking of the casting at the relatively sharp bends. In the past, these chills were formed by casting them to a particular size.

By my invention, I provide a chill which is less expensive to manufacture, more accurate in form and provides a better anchorage in the sand of the mold. This new chill is made possible by a novel method of manufacture.

In the drawings:

Fig. 1 is a side elevational view of one embodiment of my invention; and

Fig. 2 is an end elevational view thereof.

Referring to the figures, my new chill comprises a body portion 5 which is formed of a section of a steel bar rolled to the desired cross sectional shape. This shape may be that shown in Fig. 2 but in any event will be formed with an outside surface 6 of the desired curvature to be formed on the casting.

On the inner surface 7, a series of stems 8 having flat heads 9 are welded preferably by resistance welding. These stems form the anchors for the chill by which it is held in the mold. The heads 9 may be formed on the stem by any customary method such as upsetting, or they may be welded in place. The flat head such as this provides a relatively broad shoulder 10 embedded in the sand which anchors the chill securely in the mold.

The preferred method of making the chill is to roll a bar of the desired cross sectional shape by any rolling method desired. The stems 8 already headed are then welded, preferably by a resistance welding method, to the bar at convenient intervals, and the bar may then be cut to any desired length. It will be obvious that the bar could also be cut to the desired length before welding 2,803,862 Patented Aug. 27, 1957 the stems in place. This latter method is particularly useful where a large quantity of chills of the same size are required.

From the foregoing description, it is apparent that my new chill is very inexpensive to manufacture, particu larly since it lends itself well to mass production methods.

At the same time, the surface of the chill is both more accurate and much smoother than were prior chills formed by casting. Nor is it necessary to grind the surface of the chill to remove irregularities as it often is with cast chills. Still further advantage is gained by my new chill in that a mild, low carbon steel can be used for the body, the carbon content being of the order of .010% as compared with approximately .025 to .050% of carbon in previous chills. I have discovered that, because of this low carbon content and the variation between the high carbon content (0.25% to 050%) of the steel casting and the chill, it is considerably easier to break off and recover my new type chill from the casting. All of these advantages are possible by the production of the novel shaped chill by my new method.

Having thus described my invention, I am aware that numerous and extensive departures may be made therefrom without departing from the spirit or scope of the invention.

I claim:

A foundry chill comprising an elongated one-piece body of rolled steel having a carbon content of substantially .010% and presenting an outer face which is curved transversely with respect to the length of the body, and a plurality of stems Welded at one end to said body opposite said outer face thereof at locations spaced apart lengthwise of said body, said stems projectiing away from said body and at their outer ends carrying heads WhlCh extend transversely of the stems substantially completely around the respective stems and provide shoulders for embedding the chill in the mold.

References Cited in the tile of this patent UNITED STATES PATENTS 1,101,858 Lachman June 30, 1914 1,257,493 Kolla Feb. 26, 1918 1,618,016 Leek Feb. 15, 1927 1,833,128 Robe Nov. 24, 1931 1,834,290 Robe Dec. 1, 1931 OTHER REFERENCES Fanner Chaplets, Catalog 1050, October 1950, by the Fanner Manufacturing Co., Brookside Park, Cleveland 1, Ohio. (Printed by Perlmuter Printing Co., Cleveland, Ohio.) Page 26 relied on.

Images