US1540551A - Device for reenforcing molds - Google Patents

Description

June 2, 1925.

J. E. EVANS DEVICE FOR REENFORCING MOLDS Filed July 21. 1924 Patented June 2, 1925. i

1 UNITED STATES JAMES E. EVANS, OF CHICAGO, ILLINOIS,

DEVICE FOR REENFORCING HOLDS.

Application filed July 21, 1924 Serial No. 727,209.

To all whom it may concern. 1

Be it known thatI, JAMES E. EvANs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Device for Reenforcing Molds, of which the following is a specification.

My invention relates to said molding, and its object is to provide a means of easily and cheaply 'reenforcing the surface of the mold against cutting and washing by the inflowing metal.

My invention is illustrated in the accompanying drawing, in which like letters of reference refer to like parts throughout the several views, and in which Figures 1, 2 and 3 are views in perspective of different forms of my device, and Figure 4 is a view'in section of a drag or nowel in which the sand has been rammed and from which the pattern has been drawn leaving the mold, showing the mold reenforced at several points in accordance with my invention.

In sand molding, although facing sand is used, the surface of the mold is liable to be cut or WtShBd by the molten metal flowing into the mold. This is especially liable to happen at the points or corners of the mold.

To prevent such cutting or washing of the mold bythe inflowing metal, my invention provides a method of facing such portion of the surface of the mold as may be desaid leaf, which.

sired, particularly the places where thedam gel of cutting or washing is greatest, with thin sheet metal, in such a way-that sald reenforcing facing material may be held firmly in place.

The device which I use for this purpose is preferably made of tin, although it may be made of wrought iron or any other suitable metal. It is made of sheet metal, from which it'is adapted to be stamped, and it comprises a relatively large leaf of sheet metal, adapted to rest upon the surface of the mold, and one or,more thinprongs extending at right angles from said leaf and ada ted to be pressed into the sand and so hol in place on the surface of the mold because of its large extent, will retain inplace a considerable portion of the surface sand of the mold.

When the mold has been completed, the

pattern drawn, the surface of the mold a properly reenforced in accordance with my invention and the parts of the flask as- .of the surface.

sembled for the casting, the metal flowing into the mold will not wash or cut its surface, the thin sheet metal leaves resting on the surfaceof the mold and retaining the sand will readily fuse in the casting, and the thin, flat prongs, the sand and hold the surface reenforcing leaves in place, can be readily chipped off the surface of the casting when it is removed from the mold.

In Figure 1 a is the thin, flat sheet metal leaf adapted to rest on the surface of the mold. It is made of relatively large area, so as to reenforce a considerable portion In the form of the device shown in said Figure 1, I have shown a thin fiat prong b and two additional shorter prongs 0 adapted to be pressed into the sand and more securely hold the device in place to protect the surface of the mold.

In Figure 2 a is the surface protecting leaf, and b is the in two in th metal of which the device is made longitudinally from the top about half way down, then bending the sheet longitudinally to form an angle of 90 degrees and then nding over the two portions of the upper part of the sheet as shown, thus also forming the prong b by the longitudinal bend down its center into two sides at right angles to each other. This form of my device would be particularly adapted for a corner in a mold.

In Figure 3 another form showing the leaf aalso in two parts, and the prong b, bent in the same manner as in Figure 2, is shown.

- The prongs may, however, be broader or narrower and may be formed all in one plane, as shown 1n Figure 1, or in two planes, as shown in Figures 2 and 3, and the surface reenforcing leaves may be formed as illustrated or in other forms, as convenience suggests, without departing from the spirit of my invention, which consists in providing for use in sand molds a surface facing element of thin sheet material which is readily fusible in the casting and is provided with integral means for engaging with the sand and facing element in place. 3

It will be obvious that by reason of the relatively large leaf portion of the device, the surface of themold may be properly parts at right angles to each other which are pressed intoprong, a being formed e same plane by cutting the sheet of holding the surface reenforced with the use of a relatively small number of the devices, without the workmen expending much time in placing the devices. It will also be obvious that, by reason of the light construction of the prong or prongs, they will be easily chipped off from the surface of the casting when it has been removed from the mold.

It will be understood that my device is adapted for use in any portion of the mold. In Figure 4 several of these devices are shown as inserted in the portion of the mold which is formed in a drag, but they would be used in the same way in the portion of a mold which might be formed in the cope or in a cheek.

Having now described my invention, what I claim as new and desire to secure by Let ters Patent of the United States is:

'1. A device of the class described comprising a prong member with two sides disposed at an angle to each other, and a leaf member formed by the prolongation of said sides, the separation of them longitudinally and the bending of them at substantially an angle of 90 degrees to said prong.

2. A device of the class described made of one piece of thin sheet metal and comprising. a head adapted'to rest on the surace of the sand and retain the same in place, and a pointed prong at the edge of said head and substantially at a right angle thereto adapted to be imbedded in said sand and thereby retain said head in place.

3. A device of the class described made of one piece of thin sheet metal and comprising a head adapted to rest on the surface of the sand and retain the same in place, and a plurality of pointed prongs at the edge of said head and substantially at right angles thereto adapted to be imbedded in said sand and thereby retain said head in place.

4. A device of the class described made of one piece of thin sheet metal, comprising a head and a pointed prong, the head comprising members disposed at an angle to each other in the same plane, and the prong extending from the edge of the head at substantially a right angle thereto and having its sides disposed at an angle to each 0t ier.

JAMES E. EVA S.

Images