US683885A - Metal-casting apparatus. - Google Patents

Description

No. 683,885. Patented Out. I, l90l.

S. W. VAUGHEN.

METAL-CASTING APPARATUS.

(Application filed Mar. 28, 1899.) (No Model.) 2 Sheets-Shoot l.

WITNESSES,

Fq %ad I I No. 683,885. Patented Oct. I, MN.

I 8. W. VAUGHEN.

METAL CASTING APPARATUS. (Apphcation filed m, 2:; man (No Model.)

2 Sheets-Sheet 2.

YINVENTOR.

Jam-.4 M

v WITNESSES, 9:0. 6. 129a UNITED STATES PATENT OFFICE,

SAMUEL W. VAUGHEN, OF JoHNsTowN, PENNSYLVANIA, ASSIGNOR TO AMERICAN oAs'rINe MACHINE COMPANY, OF PITTSBURG, PENN sYLvANrA.

METAL-CASTING APPARATUS.

SPEGIFICAZEIQN formingpart of Letters Patent N 0. 683,885, dated October 1, 1901.

Application filed March 28,1899. Serial No. 710,779. (No modelfl 7 To all whom it may. concern.-

Be it known that I, SAMUEL W, VAUGHEN,

. a citizen of the United States, residing at Johnstown, in the county of Oambria and State of Pennsylvania, have invented certain new and useful Improvements in Metal-Cast ing Apparatus; and I do hereby declare the.

following to be a full, clear, and exact description of the invention, such as will enable otl1 ers skilled in the art to which it appertains to make and use the same.

My invention relates to metal-casting machines, and more particularly to means for coating the molds with a suitable carbonaceous material, whereby a free delivery of the casts from the molds is assured.

My invention is particularly adapted for use in connection with pig-iron-casting machines of that class in which the molds are supported and moved on an endless'carrier, and for the sake of simplicity in the description to be given herein 1 will'refer to this application of my invention hereinafter.

Heretofore pig metal has been produced in various forms of sand beds, stationary metallic chills, and more recently it has been formed in traveling molds mounted on an endless carrier. With the latter form more or less trouble has been experienced by reason of the pigs adhering andsticking to the molds when solidified, and'va'rious attempts have been made to avoid this difficulty, but with unsatisfactory results. Devices for spraying the molds with water and mixtures of different refractory materials have been employed in various forms to insure the free delivery of the pigs from the molds, and coatings of lime, clay, or similar refractory materials have been used for this purpose, and a mechanical understood by those skilled in the art of making steel. Further than this,the use of washes made of lime, clay, or other ordinary refractory materials has the effect of materially shortening the life of the molds and is particularly severe in its action upon the bearing and wearing portions of an endless-carrier machine, as these mineral refractories have the effect of abrading the working partsof abrading the working parts of the machine it acts as alubricator, thus preventing friction and loss of power, and thereby preserves the work-ing surfaces from destruction. This carbonaceous coating is also free from the objections heretofore stated with respect to the use of clay or lime on pigs which are'to be i used for steel making, as the carbonaceous matter is comparatively neutral and has no effect upon the lining of the furnaces or onpolas, nor does it affect the slag which is formed in the melting or refining process. 1 7 It is the object of my invention to provide means'for applying such coating of carbonaceous material to pig-metal-casting molds, such means being so arranged that it may be wholly or partially Withdrawn from the molds, if necessary.

Having given this general description of my invention, I .will now refer to, the annexed two sheets of drawings, which form 1 part of this specification, and in which like letters refer to like parts.

Figure 1 is a side elevation of a pig-metalcasting plant on' the endless-carrier principle which is provided with means for coating the metallic molds thereof with a carbonaceous lining in accordance with my invention. Fig. 2 is a plan view of the main construction shown in Fig. 1. Fig. 3 is an enlarged detail elevation of a section of the traveling molds and the front of one of the furnaces constituting my preferred means for producing and applying the carbonaceous coating to the molds. Fig. 4 is an enlarged vertical cross-section through one of said furnaces and molds, taken on line 4 4 of Fig. 3. Fig. 5 is a plan view of the furnace shown in Figs. 3 and 4. Fig. 6 is a further enlarged plan view of a section ofthe traveling molds shown in the preceding views, into which is introduced and applied the carbonaceous substance thrown off from the furnaces aforesaid.

While I have shown my invention as applied to a preferred form of pig-castin g plant, it will be obvious to those skilled in the art to which it appertains that its use is notlimited to the construction herein shown, and, in fact, need not be confined to pig-metal-casting molds, but can be used in connection with molds of any kind to insure the free delivery of their product, as previously referred to herein.

Referring now to the various letters of'reference, marked upon the drawings, A is a portable reservoir or ladle from which the molten metal is delivered to one or more series of molds B, which, as previously stated, are connected in an endless series by means of the links 0, the said molds being mounted on suitable wheels, which travel on tracks D, designed for this purpose.

E is an engine; F, the driving connection thereof by means of which the series of molds are operated to and from the reservoir or ladle A in the directions indicated by the arrows in Fig. 1. The molds travel toward the receptacle or ladle A below the tank and main structure, being meanwhile in an inverted position and empty, after which they return to the upper side around the idler-pulley G, thence passing under the deliverytrough H, from which they are supplied with molten metal, which is poured into the deliverytrough from the ladle A, before men tioned. The continuous travel of the conveyer submerges the filled molds into the water-tank I for the purpose of solidifying the pigs, after which they issue from this trough and are carried to the extremeend of the conveyer, where they are discharged into a car or other convenient receptacle. As the molds are returning to be filled they are in an inverted position-that is, with their tops opening downward-and since it is preferable to apply the carbonaceous material just prior to the introduction of the molten metal I locate my furnaces J immediately beneath the returning molds and near the receiving end of the conveyer. In practice I prefer to use four of these furnaces, as shown in Fig. 2, but more or less maybe used as desired. Said furnaces are constructed and designed to consume soft coal, which will give offa large amount of soot of the kind and quality with Which to coat the molds; but I sometimes use an ordinary soft-coal or coke fire, to which coal-tar or pitch may be fed, which will produce a similar result. The furnaces are constructed of steel and brick and are provided with the usual firing-door K, firebox L, and ash-pit M, and the'furnaces are located immediately under the molds and provided with an open top, thus producing an unobstructed passage for the products of combustion from the fireplace to the under surface of the molds. The furnaces are further provided with suitable wheels N and are mounted on tracks 0, which construction allows the furnaces to be withdrawn from beneath the molds when the same are not receiving metal or when they may be standing idle. At either side of the open top of said furnaces I provide suitable deflectors P, which are conveniently attached to the rails of. the track D, which serve to guide the products of combustion to the under surface of the molds, where they Will form the desired deposit. (See Fig. 4:.)

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In metal-casting apparatus the combination with an endless connected series of traveling molds, means for filling said molds, and means for subjecting the molds and their contents to water for cooling such contents, of a furnace located beneath said molds in their return path to the receiving end of the apparatus, in position to discharge smoke into said molds, said furnace being movable to permit its withdrawal from beneath the molds when desired.

' 2. In metal-casting apparatus the combination with an endless connected series of traveling molds, means for filling said molds,

and means for subjecting the molds and their contents to water for cooling such contents,

of tracks located beneath said molds in their return path to the receiving end of the apparat-us, and a furnace on said tracks in position to discharge smoke into said molds, said furnace being movable to permit its withdrawal from beneath the molds when desired.

In testimony whereof I have affixed my signature in the presence of two witnesses.

SAMUEL W. VAUGHEN.

\Vitnesses:

FRANK M. BUCHANAN, vB. J. PIOKING.

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