US2231703A - Chill for casting - Google Patents

Description

Feb. 11, 1941; w, TCLARK D CHILL FOR CASTING Filed Aug. 24, 1939 Patented Feb. 11, 1941 PATENT OFFICE CHILL FOR CASTING William T. Clark, Milwaukee, Wis., assignor to Milwaukee Chaplet & Manufacturing Company, Milwaukee, Wis., a corporation of Wisconsin Application August 24, 1939, Serial No. 291,632

2 Claims.

molten metal would ordinarily cool the slowest to thus speed up the cooling at these portions,

and thereby prevent the formation of cracks and fissures.

Heretofo-re, chills of many different types and shapes have been provided, but conditions where chilling is necessan at surfaces having both transverse and longitudinal curvature still present considerable difficulty.

So-called radius chills, that is, chills consisting of strips of metal having a transverse curvature, are in common use. These chills are made in different lengths, and it has been customary in the past, where chills were needed in locations having both transverse and longitudinal curvatures, to either place a row of short straight radius chills in the mold, or to insert large headed nails in these portions of the mold.

Both methods are obviously inefiicient, and may be characterized as makeshif It is, of course, possible to form double curvature chills to meet any particular need, but such procedure would be out of the question in view of the large expense involved.

It is, therefore, an object of this invention to provide a practical inexpensive chill for use in locations having both transverse and longitudinal curvature.

Another object of this invention is to provide a chill of the character described which can be made at a cost no greater than that of the present radius chill.

Another object of this invention is to provide a chill of the character described which may be 4o inside or outside.

defined by the appended claims, it being understood that such changes in the precise embodiment of the hereindisclosed invention may be 55 made as come within the scope of the claims.

readily bent to any longitudinal curvature, either The accompanying drawing illustrates one complete example of the physical embodiment of the invention constructed in accordance with the best mode so far devised for the practical ap- 5 plication of the principles thereof, and in which:

Figure 1 is a perspective view illustrating part of a casting having portions of double curvature necessitating the use of transversely and longitudinally curved chills;

Figure 2 is a fragmentary sectional view through part of the mold used in the casting of the cross sections shown in Figure 1, illustrating the application of the chill;

Figure 3 is a perspective view showing a length 5 of chill made in accordance with this invention; and

Figures 4 and 5 illustrate the manner in which the chill may be formed into an inside and outside curve.

Referring now particularly to the accompanying drawing in which like numerals indicate like parts, the numeral 5 designates part of a casting having a large body portion 6 and a narrow rib I joined thereto with fillets 8 at the junctions. The surface of the body portion from which the rib 1 projects, has a reverse curvature as shown, so that radius chills used in the pouring of the casting and located at the fillets 8. would have to have both inside and outside longitudinal curvature in addition to the transverse curvature of the fillet.

In the past, this called for the use of many short lengths of straight radius chills arranged in a row along the corners 9 of the mold, shown in Figure 2, or for a series of large headed nails stuck into the mold at these corners. These methods are far from satisfactory, and to overcome their objections, the present invention provides a chill comprising a strip of suitable sheet 40 metal Ill having a transverse curvature and provided with a series of notches, slots, or recesses ll in the opposite longitudinal edges thereof.

These notches, slots, or recesses are preferably directly opposite each other, as shown, and have their inner ends spaced apart to leave the central portion I2 of the strip unbroken.

These central portions 12 thus constitute links or bridges between adjacent units [3 into which the strip is divided by the notches, slots, or recesses. Inasmuch as these links or bridging portions I2 lie medially between the side edges of the strip and have but little resistance to being bent on a line transverse to the strip, a curva- M ture, either inward or outward, is easily given the chill.

The minimum radius of the longitudinal curvature into which the strip may be bent is defined by engagement of the sides of the notches, slots or recesses; and, if desired, the sides of the notches, slots, or recesses may be tapered to allow more abrupt bends.

To provide means for anchoring the strip in place in a mold, the strip has spaced holes l4 through which attaching nails I5 may be inserted to secure the same to the mold, as shown in Figure 2.

In addition to making longitudinal bending possible, the notches, slots, or recesses also permit any length of strip to be quickly severed from the standard length by merely bending the strip back and forth a few times. Hence, the foundry need not'stock chills of difierent lengths.

While for most purposes, the construction illustrated, wherein the notches, slots, or recesses are directly opposite each other, is preferable, it is, of course, possible to have the slots staggered or spaced farther apart on one side than on the other.

From the foregoing description taken in connection with the accompanying drawing, it will be readily apparent to those skilled in the art that this invention fills a long felt need by providing a commercially practical double curvature radius chill.

What I claim as my invention is:

1. As an article of manufacture, a chill for use in casting comprising: a strip of metal formed with a uniform transverse curvature to have substantially a channel shape and provided with serially arranged inwardly directed notches in the opposite side edges thereof to form articulated segments to enable bending of the chill to either an inside or outside longitudinal curvature.

2. As an article of manufacture, a chill for use in casting comprising: a strip of metal of substantially uniform thickness bent to a substantially concave shape in transverse cross-section and having its opposite side edges provided with serially arranged inwardly directed notches to form articulated segments enabling the chill to be bent to either an inside or an outside longitudinal curvature.

WILLIAM T. CLARK.

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