US1192425A - Ingot mold and feeder. - Google Patents

Description

B. H. HOWARD & E. J. TURNER.

INGOT MOLD AND FEEDER. APPLICATION FILED OCT. 2. 1915.

Patented July 25, 1916,

To all whom it may concern:

,. UNITED STATES PATENT OFFICE.

BLOOMFIELD H. HOWARR OF ASPINWALL, ERNEST J'. TURNER, OF PITTSBURGH,

- PENNSYLVANIA.

meoT MOLD AND FEEDER.

Specification of Letters Patent.

Patented July 25, 1916.

Application filed October 2, 1915. Serial No. 53,835.

Be it known that we, BLOOMFIELD H. HOWARD and ERNEST J. TURNER, citizens of the United States, residing, respectively, at Aspinwall and Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Ingot Molds andFeeders, of which the following is a specification. v

Our invention relates to improvements in ingot molds and feeders.

The object of our invention is to provide "a simple, practical and inexpensive nieans for the removal of seams, holes or cavities in. the upper portion of steel ingots known to the trade as piping, also to practically eliminate segregation and produce iron and steel ingots homogeneous throughout in ma- This 1s accom-' terial as well as structure. plished by the use of any standard ingot mold, although we prefer to use a slightly modified form of our own invention for which Letters Patent have been applied for. In this form the walls of the mold gradually decrease in thickness from the bottom to the top, the mold being made preferably rectangular with rounded corners, together with a feeder made of fire-clay or other refractory material. The, bore of the ingot mold may be uniform, decrease in diameter from top to bottom or decrease in diameter from bottom to top, but preferably the last.

In the accompanying drawings in which like characters are used to designate like parts, Figure 1 is a sectional .view of an ingot mold and feeder of our preferred rod butts. Fig. 4 shows lower end of one form of feeder. Figs. 5 and 6 are vertical sectional views showing modified forms em- .bodying our invention.

Referring to Fig. 1, A represents an ingot mold with inner surfaces B, B. On the sides of the mold A, are placed suitablevlugs 0,0, for moving the mold A, from place to place and forstripping it from an ingot. At the top of the mold A, is a projection D,

" which extends around the entire upper edge of the mold and is slightly wedge shaped as shown in Figs. '1 and 2.

E, is the feeder made of fire-clay or other suitable refractory material and in form to suit the shape of any ingot mold whatsoever. We prefer it made with walls of uniform thickness and the passage F, to be of uniform diameter but it may be made with both wall and passage modified to suit any conditions whatsoever, with the upper part of the body heavier than the lower and with the passage somewhat contracted at the top as shown in Fig. 5 or in any other desired form. At the bottom of the feeder E, is an annular groove, G, made so as to fit over the annular projection.

' In the form shown in Figs. 3 and 4: the upper edge of the mold A is perfectly flat and is provided with a plurality of rodbutts D which are adapted to enter holes or recesses 11 in the bottom edge of the feeder E and whereby the feeder is locked against lateral movement on the mold.

In the modification shown in Fig. 5 the upper edge of the mold A is V-shaped, as indicated at H and the feeder E has a cor responding shaped groove I in its lower edge. In Fig. 6 the same principle is employed only the mold A carries the groove J to receive the ll-shaped lower end K of the feeder.

Having thus described our invention, the practical workings are as follows: The feeder E is placed in position on top of the ingot mold A. Molten metal is poured into the ingot mold A, which immediately begins to freeze more rapidly along the inner surfaces B, B than in the center. As the metal rises to a higher level,- this outer freezing becomes more pronounced until the feeder E, is reached which has been heated to a high degree by pouring the molten metal through the opening F. The refractory material of the feeder E conserves the heat and not only prevents immediate freezing against its surfaces but keeps the metal in a molten state for quite a space of time during which the metal will flow downward and fill any cavities formedby the contraction of the metal thus producing an ingot practically free tively thin at the top and increasing in.

thickness toward its lower end, and a feeder of v refractory material resting ,upon the upper edge of the mold, and the feeder and 10 mold having interlocking members and the inner Walls of the feeder and mold being flush. In testimony whereof We aflix our signatures in presence of two Witnesses.

BLOOMFIELDH. HOWARD; c

7 ERNEST J. TURNER.

Witnesses:

T. D. EGKER, R. M. HOWARD.

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