US878984A - Apparatus for producing compound metal bodies. - Google Patents

Description

No. 878,984. PATENTBD FEB; 11', 1908.

J. P. MoNNoT.

'APPARATUS FOR PRODUCING COMPOUND METAL BODIES.

APPLICATION PILED Nov.17,19os.

Q N WITNESSES: INVENTOR Tiff/QT XMTM Mmno' Z3\ Q j g ATTORNEYS coatii rwhen t JOHN F. MONNOT, OF NEW YORK, -N. Y., ASSIGNOR TO DUPLEX METALS COM YORK, N. Y., A CORPORATION OF NEW YORK.

APPARATUS ron ricono-cinc oonroniin imrannonms.'

Specication of Letters Patent. Application filed November 17.1906 Serial No. 343.81@

ratentedreb. 11, isos.

To all whom it may concern;

Be it known that I, JOHN F. Monitor, a citizen of the United States, residingat New York, in the county of New York land State of New York, have invented certain new and useful Ap aratus for Producing Compound. Metal Bo ies; and I `following to -be a full,

do hereby declare the clear, and` exact'descriptioii of the same,` such as will enable others skilled in' the art to which it appertains to make .and use the same.

My invention relates to a paratus for producing compound metal odies, andeinbodies improvements in the a paratusillustrated and described in my lxjetters Patent dated April 30, 1907, No. 851,993; the

`apparatus illustrated and described in mv application for Letters Patent filed'April 410th, 1906, Sr. No. 310,910, and in the apparatus illustrated and ,described in my application for Letters Patent filed July 31st, 1906, Sr.` No. 328,606. My said apparatus is particularly adapted for carryingout the rocessesset forth in my Letters Patent o. 851,684, datcd'April 30, 1907 and No.` 853,716, dated May 14, 1907;

According to the process of said Pate t No.` 851,684 a metal i ot o'r other article 'to be coated, is' 'immersellin a bath of molten coating metal and thenV by means of asuit-y Vable casing or chamber, which is caused to surround said core while. the latter is stillin the bath of coating metal, a layer of said coatin metal of suitable thickness is segre` gated om the .main body of suoli metal, the said casing or chamber, with the article to be coated and the eiivelopin layer of molten metal therearounll, being then`- remove -from the bath of coating metal, and said segregated layer of coating metalbeing' then al owed to solidifyon the "article tobe coated, after which the enveloping casing or chamber is removed. This process is known as the segregation process v The process of my said Patent'N'o. 853,716,

do not weld together readily, particularly he coating metal has a lower melting temperature than the metal to which the coating is to be applied. According to said process, the article to` be coated is immersed in a bath of molten coating metal maintained at suchy a temperature that the molten metal is in what is known as a snperinolten condition a condition characterized by extreme' form a tight joint PANY, OF NEW.

fluidity and apparently .by a considerable degree of chemical activity. The supermolten metal unites with the surface ofthe article to be coated. coating to be applied to said article is fo'imed thereon at one time, .by segregating from the Sometimes thgaantire so A molten `metal of the superinolten bath a layer of the molten meta surrounding said article, and permitting the Same to solidify against the surface'of said article; and some-l times a mere lm coating or alloy-61m, as

itis called, is formed in the supermolten bath,

and then the article to be coated is removed,

under conditions precluding oxidation, is immersed in a second bath of coating metal of ordinary casting temperature, and a la er of such molten metal surrounding the coated surface is 'segregated from the main body of -Coating metal and caused to unite with and solidify against the alloy-ilmed surface. In carrying out the said process .b

segregation ap aratus such1 as describe some difficult as been experienced yin ob-r` taining a per ectly tight joint between the .bottom plate and lower edge of the casing.

Also some difficulty has been experiencedv due to the sticking of the bottom plates to" metal somoottoni plates the coating metal; the coati times adhering so firml tothe that they have been bro en in detachinv them. Since the'bottom platesmust be ma e with should separate readily from the ingot.

The obJects-of m l tween the bottom plateand casing, and to from stickingl to the i o t A further feature' o means whereb molten metal may 'beintro'duced into t e casing from above.

, I will now roceed to describe. my invention' withre erence to the accompan' drawinguin prising two forms of casing invention are illustrated.

In the said drawingLFi ure l-showsin side view and partl in vertice section, a coating' apparatus suc as described, comprisingl a casing, a bottom plate, hoistingapparatus for raising and lowering the casing and bot tom plate to ether or separately as desired", and a truck or moving the apparatus from place to place. Fig.2 is a similar view of an alternative form of casing provided with embodying my ist lgreat accuracy-it is desirable that they` present nventionarelto preventthe botto'm plate my invention is an improved form of casing provided -vvith'v which coating 'apparatus comion Y means for admitting the molten metal from near'the top of the casing.

-In the said drawing, 1 designates said easing, 2'the bottom plate, 3 the ingot to be s coated, 4 the head of the casing, which also.

constitutes a Weight to insure immersion of the casing in the molten metal, 5 designates a porter bar, 6 a hoisting ap )aratus suspended from a truck 7 mounte on a rail 8, and 9 another hoisting apparatus suspended from hoist 6 and having the porter bar 5 suspended from it, and having also winding drums upon which are Wound cables 10 connected to casing 1. In the construction shown-the bottom plate 2 is connected to the ingot`3 itself, by means of a screw 11. Said bottom plate has a raised rib or flange 12 of approximate inverted tf-section adapted to i'it into a recess 13 of similar shape, in the bottom of the casing.

The easing is provided with a valved pipe 11i-by Which gas may be supplied to the casing and by which the gas within the casing may be withdrawn when desired. The hoists 6 and 9 illustrated, are electrical hoists, the illustrations being purely diagrammaticaljand not designating any particular mechanical construction of hoist.

So far as described, the apparatus illustrated is substantially that of my application Sr. No. 328,606, above mentioned. In

' thel use ofv such apparatus of considerable Size, it has been found dillicult yto so pack the groeve 13 in. the bottom of the easing, as to insure a perfectly tight joint between the -bottom plate and casing; I have found that the material used for packing should be one which, while substantially solid at ordinary temperatures, so that it will not fall out of the recess in the casing, is plastic at the temperature of the molten metal and. yet not so liquid at such temperature as to flow out or to permit the molten metal to force itself past. I have found that a suitable packing material for the purpose is formed by fluorspar. This substance may be run into the recess 13 in molten condition and permitted to solidify, or it may be mixed, in powder or granular condition, with a suitable binder, such as water glass (silicate el" an alkali) and thus made plastic,and in such plastic een- (lition placed Within the recess 13, the mixture being dried to drive oil as much .of the Water as possibleflf"Inveither case the packing material so applied becomes sulliciently plastic when the casing is inserted within the molten metal under the in uence of the heat of such metal, to receive easily the sharp rib l2 of thebottom joint.

In myI Patents Nos. 851,684 and 851,993 both dated April 30th, 1 $107, I have illustrated forms of segregation apparatus in which the groove instead of being in the lower edge of thecasing, is in the bottom plate, the lower plate, and so form a tightf edge of the casing being Vv-shaped. The plastic packingl material described, 1s of course equally suitable for use in that form of apparatus.

In the apparatus shown in Fig. 2, holes 15 are provided in the upper part of the casing through which molten metal may be introduced, and a sliding shield 16 is provided'for covering or uncovering said holes at will4 In using said form of apparatus, the joint between the bottom plate and casing is lformed before introducing the casing to the molten metal. The same packing material as above described,` may be used, and may be heated up to soften it to receive the rib of the bottom plate. When introducing the casing into the molten metal, the holes 15 are kept closed until they are close to the surface of the molten metal, and then the shield 16 is raised so that as said holes enter the molten metal the latter will flow into the casing.

Suction maybe applied by means of pipe 14 to draw out of the casing the gas therein and any gas carried 1n by the molten metal and also, 1f desired, to produce a partial vacuum within the Acasing-so decreasing the hydrostatic pressure on the joint between the bottom plate and casing.

[n the drawings vI have shown a thin washer 17 between the bottom plate Qand the ingot 3, the diameter of which washer is substantially the internal diameter of the casing l 'lhis'washer is to prevent the molten metal inclosed within the annular space between the ingot and casing from sticking to the bottom plate. hen this washer is used, the molten metal contacts with said washer instead of with the bottom plate directly. Possible adhesion of said washer to the end of the coated billet is immaterial; whereas it is desirable that the bottom plates themselves shall not adhere to the end of the coated billet. Such bottom plates are relatively expensive, owing to the necessity of litting them tothe grooved ends of the casings.

What l claim is:-

1 Coating apparatus comprising in combination an open-ended casing for containing lluid metal and an end plate therefor, one of said parts having a recess and the other a rib adapted to enter said recess, and a packing material within said recess, consisting prineipally of a material which is solid at ordinary temperatures but plastic at the temperature of molten metal. i

2. Co ating apparatus comprising in combination an open-ended easing for containing lluid metal and an end plate therefor, one of said. parts having a recess and the other a rib adapted to enter said recess, and packing material Within said recess comprising fluorspar.

3. Coating apparatus comprising in combination an open-ended casing, an end plate therefor, and a Washer covering said end 878,9.84 i i a plate, and arranged to extend substantially a fluid-tight joint with seid end plate through 10 to the side of the easing when said easing and the'intermedianoy of plastic pzieking material. end plate are together. In testimony whereof I alix my signature,

4. Coating apparatus comprising in eombiin the presence of two witnesses. 5 nation an open-ended easing for containing T Huid metal and en end plate therefor, said JQ` F' Mok NOT easing provided with a seperate opening for Witnesses: the admission of molten metal, with a shield JAS. K. CLARK, for such opening, and with means for making BYRON E. ELDRED.

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