US1702790A - Refractory plug for ingot molds - Google Patents

Description

Feb. 19, 1929. 31;?02790 E. 1.. MESSLER REFRACTORY PLUG FOR INGOT MOLDS Filed April 24, 1928 l FIG 3 FIG. 2

FIG. 5

INVENTOR EUGENE L. MESSLER.

'13, mmwrzwm his asHorneg' Patented Feb. 19,1929. a Q 1,702,790

UNITED STATESTPATEUNT OFFICE.

EUGENE L. MESSLER, OF PITTSBURGH, PENNSYLVANIA. 1X

REFRACTORY PLUG FOR INGOT MOLDS.

Application filed April 24, 1928. Serial No. 272,425.

This invention relates to an improvement metal would escape during the pouring operin ingot mold plugs and the like. ation. I

As is well known in the art, ingot molds To overcome this disadvantage and to perare usually constructed to mold an ingot of Init a ready centering of the plug 5, as shown metal with its large end up. This practice in Fig. 5, the side surface 5 of the plug permits the ingot to be readily withdrawn is tapered about five degrees more than the from the mold with th'e aid of the ordinary side wall 1 of the hole 1. This difference stripping ram which passes through the botin taper permits a line contact between the tom hole ofthe, so called, big-end up inplug 5 and the ingot mold 2 at 4. Obviously 10 got molds. the plug 5, due to its taper, is free to pass over 20 problem to contend with.

Over a period of years next preceding the slight irregularities of the surface 1, and for filing of this application a great. many dethe same reason the plug is easily dropped vices have been evolved to plug the aforesaid into place to seat itself. bottom hole of the ingot during the pouring Since the line contact between the ingot and cooling of the metal therein. These demold and the plugis adjacent the upper edge vices have proven in many instances to be too of the plug, as shown at 4 in Figure 5, it difficult to properly install in the ingot mold should be understood that any irregularities or have been of such form or shape that their in the mold opening 1 tending to destroy the transportation and storage was a difficult line contact do not in fact do so. This is for the reason that the weight of the plug The object of this invention is, therefore, to and the reaction of the .molten metal first provide an ingot mold plug which is comstriking the plug causes the upper edge thereposed of a suitable cementitious heat resistof to chip and spall around the irregulariing composition, and which is so formed that ties, and in this manner the plug will settle.

25 its installation and transportation or storage in the hole 1 to maintain the line contact.

may be made with relative facility. With this particular shape of plug it was In the accompanying drawings Figure 1 is found that its depth need not be more than a plan View of a large size plug of this intwenty per cent of its diameter for the twelve v ventlon; Flgure 2 1s a ver ical cen ral inch sizes, and in the six inch sizes it has been 30 tional view of the same; Figure 3 is a plan found that forty per cent of the diameter 8 view of a smallertype of plug embodying gives suflicient depth of material to result in the same general structure as the previous th n s ar trength,

pl g; Figure 4 1S a central vertical sectional Figuresl to 4 inclusive give a detailed idea view of the plug shown in Fig. 3; and Flgur of the relative proportions of the twelve inch 5 5 is a central vcrtlcal sectional view through lu 3 d th ix i h l g 5, It is to be an ingot meld Showing a pl g f this l V understood that sizes intermediate of the tion installed thereln. plugs shown'may be constructed having the Although the formation of the ingot mold dimensions determined by the proper ratio plug is the essence of this invention, it is well to th lugs.

40 to note that the composition described and. The relatively flat or disk shape of the claimed in my co-pending application, Seri plugs permits them to be packed very close t0- No. 220,288, filed September 17, 1927, h gether for either transportation or storage.

Pm n f be h s known Substance of This featurealone would prove them very which to make the plug. p valuable. to the trade, since a large portion Heretofore it has been the practice to make "of the cost of the ingot mold plugs is replugs of this generalstructure. of relatively, flected from transportation charges which great depth; that is, the plug would extend are greatly reduced due to lesser weight per downwardly approximately half the depth of plug. That is, the plugs of the present inthe bottom hole 1 of the ingotmold 2. It was vention, due to their composition and defurther the practice to have the sides of the creased thickness, weigh about sixty per cent plug and the sides of the hole substantially as much as the plugs now in use.

parallel. In the event that any irregularitles What I claim is:

were on the walls 1 of the bottom hole 1, it 1. An ingot mold plug having a side suris obvious that a plug of this nature would face tapered five degrees or more than the 55 not seat tightly, and as a result some molten taper of ingot mold hole wherein it seats to permit only a line contact between said plug ing its sides formed with a single surface and the ingot mold. tapered to a greater degree than the wall of 2. An ingot mold bottom plug having its the bottom hole of the ingot mold. 10 sides formed with a single surface tapered to In witness whereof, I hereunto set my 5 a greater degree than the Wall of the bottom hand. a

hole of the ingot mold.

3. An ingot mold plug of disk shape hav- EUGENE L. MESSLER.

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