US1507429A - Apparatus and method for casting metal products - Google Patents

Description

Sept. 2, 1924. 1,507,429-

A. R. ows

APPARATUS AND METHOD FOR CASTING METAL I RODUQTS' Filed March 17. 1923 2 Shoots-Shut 1 I avwzwtoz Sept. 2, 1924.- 1,507,429

A. R. ROWE APPARATUS AND METHOD FOR CASTING nus-um raonucws Filed March 17. 1923 f-z sum-3mm Patented Sept. 2, 1924.

UNITED STA TES PATENT OFFICE.

Animnwn. ROWE, or PORTSMOUTH, OHIO.

Application filed March 17, 1928. Serial No. 625,855.

To all whom it may concern:

Be it known that I, ANDREW R. ROWE, a citizen of the United States, residing at Portsmouth, Ohio, have invented certain new and useful Improvements in A paratus and Methods for Casting Metal Froducts, of which the following is a specification.

This invention relates to improvements in the art of casting iron and steel ingots and other metal products.

More particularly the invention relates to an improvement on the United States Patent Number 1,399,798, which was granted to me on December 13, 1921, for an apparatus and method for casting metal products.

One important object of the invention is to provide an improved method and apparatus of this character wherein the small amount of piping existing on the top of the ingots cast with the apparatus of the prior patent will be still further decreased so that it is almost entirely eliminated.

A second important object of the invention is to provide an improved form of reservoir which will maintain its efliciency as a reservoir until the mold has been completely filled.

A third important object of the present invention is to provide an improved form of reservoir which projects, but little, if at all, above the top of the ingot mold, but which in no way interferes with the complete filling of the mold.

With these and other objects in view, as Will be hereinafter apparent, the invention will now be described in detail, reference being had to the accompanying drawings, and will then be specifically claimed.

In the accompanyin drawings like characters of reference indlcate like parts in the several views, and:

Fig. 1 is a vertical median section through the top part of an ingot mold showing the.

mold being filled.

Fig. 2 1s a similar section showing the completely filled mold, and the position of the reservoir when such mold is filled.

Fig. 3 is a similar section showing a modified arrangement of the device.

Fig. 4 is a view showing a second modification of the device.

Fig. 5 is a detail plan view of one form of the reservoir as shown in Figures 1 and 2. Fig. 6 is a side elevation of said reservoir.

completely Fig. 7 is a plan view of the form of reservoir shown in Fig. 4.

Fig. 8 is a modification wherein space is left between the reservoir and mold on both sides of the reservoir.

It will be noted that the device has been shown in the accompanying drawing in several embodiments which, while being generically alike are specifically different. In each of these forms there Is provided an ingot mold 10, and above this mold is disclosed a pouring nozzle 11 from which may issue the molten metal. In the form shown in Figures 1 to 3, there is provided a reservoir having side walls 12, and an integral bottom wall 13 closing the bottom of the reservoir with the exception of the perforated openings 14 which are formed in such bottom. This reservoir and bottom are preferably made of fire clay or the like, and the side walls are provided with outwardly extending flange portions 15, which rest either on top of the mold itself, as shown in Fig. 1, or upon a refractory limng 16 supported on a shoulder 17 formed near. the top end of the mold 10 by an enlargement of the interior dimensions of said top end.

In the form shown in Fig. 4, this re fractory lining 16 is tapered interiorly so that the space between its inner walls 1s of inverted frusto-pyramidal form. Moreover, the side walls 12 of the reservoir used with this form are similarly tapered, so that when the reservoir is in osition, it plugs the upper end of the mol In each of the forms of reservoir, there are provided a number of vents 18 which lead from the bottom ofthe reservoir up to the top so that the air entrapped in the top of the mold may escape therefrom as the mold is filled. These vents may be positioned in any desired place and may be arranged 1n any desired way.

In the use of this improved form of reservoir, the reservoir is laced in the-top of the ingot mold and t e nozzle opened so that the molten metal flows into the reservoir. The air entrained by the down flowing stream from the nozzle which is under hea head will rise up from the pool of meta in the reservoir, while the molten metal free from this air will flow down through the erforations in the bottom. Thus the mold pro er is fed by the small stream or jets with ut little head pressure from the metal in the reservoir, and this allows the metal to rise evenly in the mold, and at the same time gives the gases and impurities a better chance to reach the surface. When the metal in the mold reaches the bottom of the reservoir, the entire reservoir will be lifted, and the metal in the reservoir will continue to flow out, the reservoir itself floating on top of the main body of metal in the mold until the mold has been completely filled. Furthermore, as the reservoir itself has become intensely hot from the molten metal, it will rest on top of the metal inthe mold and keep the upper end of the column hot so that in the process of freezing, which takes place from the bottom up, the metal in the top of the mold will sink down, and there will be practically no pipe or air space left in the top of the in ct.

It is 0 course obvious that these reservoirs may be made to suit any shape of mold desired to be used, and it will be seen that they can be used, especially in the forms shown in Figures 1 and 2, without any change whatever in the mold itself.

It is also to be noted that the vents 18 may, in some instances, pass through the flange of the reservoir or pass under such flange.

Having thus described the invention, what is claimed as new, is:

1. In an apparatus for casting metal, a mold having an open top, a reservoir of relatively lighter material than the material being melted, said reservoir being loosely seated in the top of said mold, said reservoir projecting downwardly into the top of the mold and having an inte al bottom with erforations therein, there eing vents provided between the exterior walls of the reservoir and the walls of the mold whereby when the material being moulded is poured in said reservoir, it may pass through the holes in the bottom thereof and the air in the mold escape through said vents.

2. In an apparatus of the class described, a metal mold having an open top, a reservoir adapted to fit within the open top of said mold and having side walls, and a bottom immovable with respect to said side walls and provided witha series of perforations, said reservoir having vents formed on the exterior of the side walls affording passages for the escape of air from the top of said mold.

3. In an apparatus of the class described, the combination with a mold, of a reservoir adapted to fit within said mold and having at its upper end a peripheral flange resting on the top of the mold, said reservoir havin a bottom immovable with respect to the body of the reservoir and provided with perforations, said reservoir further having vents formed therein to permit passage of air from the upper end of the mold.

4. The method of depositing molten metal in a mold which consists in discharging a relatively large stream of molten metal in a fioatable reservoir positioned at the top of a mold and discharging the metal from the reservoir in relatively small streams through holes in the bottom of the reservoir and forcing out the air through vents between the outer walls of the reservoir and the mold, and continuing the pouring until the reservoir is floated by the ris-' ing of the metal in the mold.

In testimony whereof I hereunto aflix my signature.

ANDREW R. sown.

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