US1803342A - Hot top for ingot molds - Google Patents

Description

M885, 1931- I E. L. MESSLER ET AL 1,803,342

HOT TOP FOR INGOT MOLDS Filed Oct. 10, 1929 INVENTOR Euqena LMessle r'fi James Thomas b, w a WWW their attor nega'.

Patented May 5, 1931 UNITED STATES PATENT OFFICE EUGENE 1.. MESSLER, or rir'rsnunen, AND JAMES THOMAS, on smPsvI'LLn PENNSYLVANIA now won FOR moon iaoLDs Application filed October 10, 1929. Serial No. 398,594.

This invention relates to hot to s, and constitutes a continuation in art our applicagion Serial No. 316,140, ed October 31st, 19 8.

It is wellv known in the art that a hot tog consists of a hollow refractory body whio is fitted over aningot-mold to contain a volume of molten metal (after the ingot has been teemed) above that which comprises the inglot in the ingot-mold proper. This upper ody of metal flows downwardly and fills the so-called pipes which form within the ingot as it cools.

According to usual practice a portion of the hot top extends into the bore of the ingotmold a slight distance downwardly past its upper edge. This serves to prevent molten metal from escaping between the ingot-mold and the hot top. In o oration, it is this ortion' of the hot top which is destroyed. hat is to say, the metal of the ingot engages this .portion oiithe hot top, and in contracting during coolin tends to fracture it. The remainder of t e hot top above this downwardly extending portion is relatively substantial.

' We propose to provide a hot top formed of several refractory members, which may he adequately assembled in position on an ingot-mold to serve in the desired manner. That is, we do not form the downwardly extending portion of the hot top integral with the remainder of the hot top, as has been the practice heretofore. Qbviouslya, the lower portion. of the hot top maybe renewed each time that an ingot is cast, and the upper portion of the hot top may be used repeatedly.

To prevent molten metal from entering the joint between'the two hot top portions and forming a lateral fin on the sinlrhead,

weprovide a thin metal lining. it is with parted hot tops of this nature, and with means to protect the joint between the several portions of an assembled hpt top that our invention has to do.

In the accompanying drawings Figure I is a central vertical sectional view, indicating .fragmentarily an ingot-mold, and showing the hot top of our invention operatively associated therewith; Figure II is. an elevation showing in plan the top of an ingot mold which has a fluted bore; Figure III is an elevation showing in bottom plan the lower portion or member of the hot top; Figure 1V is 'an'elevation in plan showing the assembled hot top mounted on the ingot-mold; and Figure Vis a view in section taken on the plane VV of Figure I. I

Referring .to the drawings, the reference numeral -1 indicates an ingot-mold having the bore 2. Figure I illustrates generally a hot top, embodying the features of our invention, positioned on-the mold. The hot top comprises an upper refractory body 3, and a lower refractory member 4. A portion 4a of the member 4 extends into the bore of the mold, and it fits snugly to prevent molten metal, as in teeming themold and hot top are filled, from escaping at the top 5 of the mold. Obviously, the portion 4a must be shaped to conform with the bore of the ingot-mold. As the member 4 is not integral vwith the other portions of the hot .top,'the upper member 3 thereof may be ofprotecting the line of jointure between the two hot top portions, the metal lining member prevents the molten metal from com. ing into direct contact with the refractory material of the top. This is desirable because it minimizes the tendency of the hot top to spell, and to drop fragments into the steel.

We have shown the hot top resting im mediately on no upper edge 5 of the ingot mold, but it is to be understood that the assembled hot top may be blocked up in the manner known to the art. This is a 'well known practice, and no illustrations is deemed to be necessary; suffice it to say, that our top is adaptable to this practice.

What we claim is:

1. A hot-top for ingot molds comprising an outer portion of refractory material, said outer portion being formed of an upper and lower member, the lower member having a depending portion outwardly contoured to lit the inner surface of the ingot mold, and a thin metal lining member arranged within the two refractory members aforesaid.

' 2. A hot-top for ingot molds comprising an outer portion of refractory material, said outer portion being formed of an'upper and a lower member, the lower member having a depending flange with its outer surface contoured to fit the inner surface of the ingot mold, the inner surface of said flange being of a section to correspond and align with the inner surface of said upper member, and a lining member removably arranged within the said refractory members.

In testimony whereof we have hereunto set our hands.

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