US1278206A - Ingot-mold. - Google Patents

Description

W. S. POTTER.

NGOT mow. APPLICATION FILEP JAN. 26 ISIS.

1,278,206. I Patented Sept. 10, 1918.

WITNESSES Z I daiwv TTORA/EYS WINFIELD s; POTTER, or PITTSBURGH, PENNSYLVANIA.

INeoT-MoLD.

Specification of Letters Patent. I

atented Sept. 10, 1918.

Applicationfiled January 26, 1915. Serial No. 4,429.

To all whom it may concern:

Be it-known that I, (VIN FIELD S. Forum, a citizen of the United States, residing. at No. 1317 Highland ave, city of Pittsburgh, county of Allegheny, State of Pennsylvania,

' have invented certain new and useful Improvements in Ingot-Molds; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

' My invention relates'to certain new and I useful improvements in ingot molds forthe forming of'ingots of manganese steel. and

other steels, said molds being of the kind known as inverted molds, that .is to say, ingot molds whose interior cross section increases from the bottom upwardly toward the zone of the sink head or riser.

In the accompanying drawing,

Figure 1 represents a vertical sectional view of an ingot mold embodying the invention; l Fig. 2 represents, on a larger scale, a sectional view of a portion of the bottom joint thereof; r

Fig. 3 represents a vertical sectional view showing a modification;

' Fig. 4 represents a top plan view thereof.

Similar letters of reference indicate similar parts throughout the several views.

Referring to the drawing, a indicates an iron bottom plate upon which the inverted ingot mold b is supported. The interior of the mold may be of any suitable dimensions according to the size of the piece to be manufactured. In order to hasten the freezing of the lower portion of the ingot, the walls of the mold are preferably made thickest at the bottom, and, on this account, taper from the bottom upwardly, as indicated,a suitable taper being say. one inch on each side for an ingot. whichis twenty inches square at the bottom and of the relative height shown in the drawing, so that where the taper ends, at a height shown by the letters (I, d, the ingot may have, for instance, a cross sectional area corresponding to 22 inches square. The iron bottom plate a is provided wit a projection h, whose edge periphery cotiperates with the inner edge of the lower opening of the mold, whereby the mold may fit snugly over and upon the said projection h. In order that the parts may. fit with a degree of snugness satisfactory in practice, the projection his preferably rounded oif, as shown,

and thecooperating inner edge of the lower ope-n1 ng of the mold is given a correspondng curvature. The purpose of thus providmg for a suitably close fit between-the projection Z1. and the inner edge of the lower openlng of the mold is to insure against the formation of a fin of steel at the smaller and lower endof the poured ingot,- which -fin, 'if

thick, would prevent the subsequent stripping of themold-from the ingot, in which event, both the mold and the ingot would- 'have to be scrapped. By providing the profinning and locking of-the jection h, the ingot in the mold is prevented, and it becomes entirely feasible to strip the mold from the ingot by means of the ordinary large mechanical strippers, such as areused for. stripping molds of the ordinary type.

As a further precaution, asoft plastic roll of luting material, preferably of fire clay lmade plastic by oil, or-a mixture of fire clay and sand, made plastic by oil may be placed Y upon the upper surface of the bottom plate, .so as' to encompass the projection in; whereupon, when the mold is set down upon the bottom plate, the roll of luting material will be flattened out into a thin sheet, as indicated at c. In general, however, this luting material will be necessary only when the opposed surfaces of the mold and bottom'plate have become rough through use, for the reason that the mold, whose centering upon the bot; tom plate is facilitated by the projection 71. will make a sufficiently snug fit therewith to obviate any: substantial finnin Atthe upper part of the 1561a, that is to say, at the. zone of the riser, a refractory head is provided, which is preferably formed as follows: Bent rods t, or their equivalents,

may be-used as-a crab or frame about which a core of drysand mixture, or ganister mixture is molded, and then dried in any, suitable core oven. The frame referred to is em ployed as a reinforcement of the core and is preferably made to project slightly, as shown, both at the top and at the bottom, so that when of theing'ot mold, as shown in Figs. 1 and 3, the weight of the core, together with any weights which may rest upon the core is carthe core is placed on the corresponding ledge ricd to the. ledge of the ingot mold, by the bent rods t or their equivalent.

When the refractory head 6 is placed 4 the ingot mold, a small quantity of any suitable luting material, as, for instance,a mix- 3 .ture of fire elav and oil, is placed on the tering projection making a snug fit with the material sealing the joint between the bot-' tom plate and mold, the inner edge of said lower opening of the main body portion being curved to fit the said rounded-off projection.

4:. In an ingot mold of the kind described, a refractory head consisting of a baked core of refractory material, containing a reinforcing frame projecting through the lower surface of main body portion of the mo 5. In an ingot mold of the kind described,

1 a refractory plate or the refractory head and adapted to rest upon a corresponding ledge of the d head consisting of a baked core of refractory forcing frame projecting-from the lower surface of the re ractory head and adapted to material, containing a reinrest upon the corresponding ledge of the main body portion of the mold, and a cover plates forholding the refractory head in place during the pouring of the ingot. v

In testimony whereof I aflixmy signature, in presence of two witnesses.

WINFIELD s. POTTER.

EMMA M.

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