US2280906A - Stool for ingot molds - Google Patents

Description

H. FELSING STOOL FOR INGOT MOLDS .Filed Dec.

April 2s, 1942.

13, 1941 2 Sheets-Sheet 1 mm /M T d i d i z, w w

A u V2 April 28, l942-` H. FELslNG '2,280,906

STOOL FOR INGOT MOLDS Filed Dec. 13, v1941 2 Sheets--ShemI 2 INVENTOR E mcd-*avai Patented Apr. 28, 1942 2,280,906 sroor. Fon moor Moms Howard Felslng, Wheeling, W. Va., assignor, by direct and mesne assignments, to William H. Warren, Steubenville, Ohio, and James A. Baker, Pittsburgh, Pa.

Application December 13, 1941, Serial No. 122,795y

` 7 Claims. I (Cl. 22-139) This invention relates to a stool for ingot molds, i. e.,- the base which receives and supports an open-bottomed moldf'and forms therewith a chamber adapted to receive molten metal in the casting of ingots or Athe like. In particular, the invention relates to a mold stool having a supporting and enclosing shell and an insert removably positioned therein adapted to be engaged by the molten metal teemed into the mold.

The present invention is an improvement upon that disclosed in my Patent 2,134,970. The stool disclosed in the latter represents a material advance over conventional mold stools, from the standpoint of the length of the useful life. Stools made according to my prior patent, for example, have outlasted ordinary cast-iron ingot stools many times over. It isthe object of the present invention to provide a mold stool having a still greater useful life tha-n the stool of my prior patent. i v

In a preferred embodiment of the invention, I provide a supporting and enclosing-shell having a bottom and. side walls, and a rim cast therein extending around the side ,walls and overlying only the peripheral portion of the bottom of the shell, leaving the remaining central portion of the bottom exposed. I provide a removable insert yadapted to be disposed on the bottom of the shell within the rim east therein, the top of the insert being at the vsame level as the top of the rim thereby providing a substantially plane floor for receiving the mold proper and forming the bottom of the ngot cast therein. The insert may be composed of-a plurality of separate blocks but 'is preferably a. unitary block. In either case, the insert substantially fills the space within the fil cast-in rim. The shell is preferably of steel while the rim and insert are preferably of cast iron, for the reasons stated in my prior patent aforesaid.

The novel features and advantages of the invention will be made apparent duringthe following detailed description of a preferred embodi ment and modification, referring to the accompanying drawings for typical illustrations thereof. In the drawings,

Figure 1 is a plan view of one embodiment;

Figure 2 is a side elevation;

Figure 3 is a longitudinal section taken along the plane of line III-III of Flgure 1;

Figure 4 is an end elevation;

Figure 5 is a Vtransverse section taken along the plane of line V-.-V of Figure l.

Figure 6 is a view similar to Figure 3 showin the preferred embodiment; and

Figure 7 is a view similar tov Figure 5 showing the preferred form.

Referring now in detail tothe drawings, and, for the present, to Figures 1 through 5, a" mold stool according to my invention, indicated generally at I0, comprises an outer mletal shell II.

4a. cast-in rim I2 anda separately formed precast each Cornel.

along the ends and formed by the side walls IIv and ribs 22 and 22a extending upwardly from, the bottom Il of the shell and spaced inwardly of the side walls. Similar pockets 23V extend along the sides of the stool, being formed by the walls I5 and ribs 24 Iand 24a extending upwardly from the bottom of the stool. The side walls I5 and I6 are of tongue and groove conformation adjacent the upper edges as shown at 25 to provide further interlocking with the rim 2l).y The rim 20 has corner shoulders Ia in abutment with shoulders I8 of the shell Il, adapted to engage the exterior of a mold such as that'indicated at M in Figure 3, when lowered on the stool, and position it properly thereon.

In the embodiment illustrated in Figures 1 through 5, the insert I3 is composed of end blocks 26 and ancentral block 2l. The end blocks are shaped to conform to the ribs 22 which are of dove-tailed section and to the ribs 24. It will be apparent .from the drawings that the 4blocks 26 may be lowered into place within the rim 20 in positions spaced from the ends of the opening or well therein and then moved toward the ends of the shell to cause interlocking engagement of the portions 28 of the blocks with the cooperating portions of the ribs 22. Y

The blocks -26 have shoulders 29 projecting `from the bottom inner edges thereof. Spaced slots llll are formed in the shoulders 29. The

block 21 has overhanging end portions 3l provided with tongues 32 adapted to enter the slots 30. The ends of the block 21 have mortises 33 adapted to receive the heads and shanks of bolts 3l. The ends of the bolts extend through holes in the bottom I4 of the shell and the block 21 is firmly anchored to the shell when nuts are applied to the projecting ends of the bolts and turned home. It will be apparent that the bolts are inserted in the mortises 33 before the block 21 is lowered into position. Once the block 21 is placed, it will be apparent that the blocks 26 are positively secu'red in position by the ribs 22 and the shoulders 29. y

The blocks 26 and 21 forming the insert I3 have the same height as the rim 20 whereby the composite structure affords a plane upper surface for receiving the mold proper and the molten metal poured thereinto. While the insert becomes practicaly integral with the shell when secured thereto in the manner explained above, for purposes of handling or the like, there is sufilcient clearance between the insert and the remainder of the stool to permit slight expansion and contraction on heating and cooling. This is also true of the interlocking engagement of the rim 20 with the shell but the rim, of course, is permanently anchored to the shell.

When the insert I3 has become worn or eroded to such extent that further use thereof is inadvisable, it is a simple matter to remove the nuts from the bolts 34 and then replace the insert or the central block thereof in case the end blocks are not badly worn, whereupon the stool as'a whole is restored to its original condition at relatively small expense and without loss of time. Since the insert I3 extends the full depth of the space within the rim 20, the useful life of a stool according to the present invention is much greater than that of the stool shown in my prior patent. At the same time, all the advantages of the latter are preserved in the present construction such as relatively low cost, rm anchorage of the insert to the shell and ease of replacing the insert.

Figures 6 and 'l illustrate a slightly different 4 construction which is, in general, preferred to that shown in Figures 1 through 5 and differs from the latter only in two major respects. First, the rim 20' thereof is somewhat wider at the ends of the stool than the rim 20 and second, the insert I3' comprises a single unitary block. The remaining portions of the stool shown in Figures 6 and 7 are practically identical with corresponding portions as shown in Figures 1 through 5 and are designated by the same ref.. erence numerals. The rim and block I3 have cooperating shoulders 35 and 36. The upper portion of the joint between the rim and block isprovided with a fllling 31 of asbestos or the like.

It will be apparent that the embodiment shown in Figures 6 and 7 may be used in precisely the same manner as the stool shown in Figures 1 through 5 except that in the former, the block I3', of course, must be replaced in its entirety when it has become worn or eroded beyond the point of further satisfactory service. The aforementioned advantages characterizing the stool shown in Figures 1 through' 5 are also inherent in the preferred embodiment shown in Figures 70 end blocks.

6 and 7.

Although I have illustrated and described but a preferred embodiment and one modification of the invention, it will be understood that changes in the details of the structure disclosed may be made without departing from the spirit of the invention or the scope of the appended claims.

I claim:

1. In a stool for ingot molds, an outer metal shell including a bottom and side walls upstanding therefrom defining a receiving space, a metal rim cast in said shell, extending around the bottom inside said Walls and covering only the peripheral portion of the bottom, and an insert re'- movably disposed on said bottom and substantially lling the remainder of said space unoccu- 15""' pied by said rim.

2. In a stool for ingot molds, an outer metal shell including a bottom and side walls upstanding therefrom d'ening a receiving space, a metal rim cast in said shell, extending around the bottom inside said Awalls and covering only the peripheral portion of' the bottom and leaving the greater, central portion thereof exposed, and an insert removably positioned within said rim and overlying said central portion of said bottom.

3. In a stool for ingot molds, an outer steel shell having a bottom and side walls, an iron rim cast in said shell, extending around the side walls and covering only the portion of the bottom adjacent said Walls, said shell having projections keying with said rim, and a cast-iron insert resting on said bottom, secured thereto and substantially lling the space within said rim.

4. A stool for ingot molds as defined by claim 1 characterized by said insert having mortises adapted to receive bolts extending through said bottom. d

5. In a stool for ingot molds, an outer metal shell including a bottom and side walls upstanding therefrom defining a receiving space, a metal rim cast in said shell, extending around the bottom inside said walls and covering only the peripheral portion of the bottonf, and an insert removably disposed on said bottom and substantially lling the remainder of said space unoccupied by said rim, said insert including a pair of end blocks and a central block.

6. In a stool for ingot molds, an outer metal shell including a bottom and side walls upstanding therefrom defining a receiving space, a metal rim cast in said shell, extending around the bottom inside said walls and covering only the peripheral portionof the bottom, and an insert removably disposed on said bottom, said insert comprising a unitary block overlying substantially the entire area of said bottom within said rim.

7. In a stool for ingot molds, an outer metal shell including a bottom and side walls upstand-f HOWARD FELSING.

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