US851993A - Apparatus for coating metals. - Google Patents

Description

INVENTOR em pwugm flhq Ze'wa ATTORNEYS MM Y M J. F. MONNOT. APPARATUS FOR COATING METALS. APPLICATION FILED DEG.26,1905.

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UNITED STATES JOHN FERREOL MONNOT, OF NEW YORK, N Y.

APPARATUS FOR COATING METALS.

Specification of Letters Patent.

atented April 30, 1907.

Applicationfiled December 26, 1905. Serial No. 293,411.

To aZZ whom, it may concern..-

Be it known that I, J on FERREoL MON- NOT, a citizen of the United States, residing in the city, county, and State of New York, have invented certain new and useful Apparatus for Coating Metals; and I hereby declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it ap- IO pertains to make and use the same.

My invention relates to improvements in apparatus for coating metals, and is particularly intended for use in producing compound metal bodies comprising a base or core and a 1 metal coating therefor 'welded together,'ac cording to the process set forth in my applicationfor Letters Patent filed June 18, 1905, Sr. No. 265,508. According to said process, a base or core of the metal to be coated, pref- 1 2'0 erably after being first thoroughly cleaned, so as to present an absolute metallic surface, and after preliminary heating, has contacted with its surface a mass of the desired coating metal in amolten condition, a portion of the J2 molten metal in immediate proximity to the surface of such core or base being then segregated from the remainder of such mass and allowedto solidify upon such core or base. Preferably, the coating metal so employed is 1 o heated to a point far beyond the melting point, at which it appears to display chemical activity, uniting readily with the core or base to form a welded-on film coating which unites the core or base and thecoating metal 5 after solidification of the latter, thus firmly welding them together. Said process is ap- 1 plicable to the production of ingots, plates, slabs, and the like, which are intended to be worked or extended by further treatment 40 into plates, sheets, tubes, wire, structural shape, and other .manufactured articles. Said process is also applicable to the coating of articles which are not to be extended subsequently by working.

My invention consists in the novel con- 'struction of the apparatus; in means for mechanically segregating from the body of molten metal in contact with the core or base, a portion or layer thereof of suitable thickness -for forming the desired coating; and

generally in the features hereinafter described and particularly pointed out in the claims.

The objects of my invention are to pro- 5 5 vide simple and efficient apparatus for forming a coating on a core or base by the segregation process, and to make the same quickacting, easily operated, and relatively inexpensive.

I will now proceed to describe my invention with reference to the accompanying drawings, illustrating one form of apparatus embodying my invention, and will then point out the novel features in claims.

In the said drawings, Figure 1 shows a side 6 view of said apparatus, and Fig. 2 a front view thereof, the apparatus being shown, in each view, in connection with a receptacle containing molten coating metal, such receptacle being shown in section. Figs. 3 and 4 are detail views illustrating alternative eonstructions.

In the said drawings, 1 designates the said receptacle, which may be a suitable crucible containing the molten coating metal.

' The apparatus herein described is designed- For holdin t e coreor billet I rovide a, WWW '51 s iece 3 and connectin r0 4. This frame s provi c with a center rod5 provided with an adjustable centering point 6, and the bottom plate 1 is providedwith a corresponding centering point 7. Thebillets or cores to be coated are customarily provided at the ends with centering recesses, adapted to receive these centering oints. A billet or core so held is accurate y centered with respect'to the segregating shella necessity for accurate yrork. The said supporting frame is customarily sup orted in such manner that it may be raised and lowered readily, as for example by a pneumatic hoist 8, which may form part of a suitable crane, not shown.

U on the side rods 3 is mounted a sliding hea or chuck 9, carrying the hollow shell or cylinder 10 of such size as to inclose between it and the core or base a layer of molten coating metal of the desired thickness. This head and the segregating shell or cylinder carried by it are arranged to be raised and lowered by suitable means, as for example pneumatic hoists 11. The cylinders 12 of these hoists 11 are carried by a cross-head 13 which moves with the supporting frame raised and lowered by hoist 8. The arrangement s I therefore, that the entire structure comprising said frame, with the ingot or core therein, and shell 10, and the hoists 11, are raised and lowered by hoist 8 without .necessary relative movement of any of said parts, while said shell 10 may be raised and lowered, with reference to the core or billet, by means of hoists 11.

In the operation of my apparatus, a core or billet to be coated is secured in the supporting frame by means'of the centers 6 and 7, While said frame is clear of receptacle 1, and then said frame, with the core or billet ten metal in the receptacle 1, the shell 10 being in its elevated position. The shell 10 is '0 en lowered rapidly by means of the .hoists 11. Said shell in its descent segregates from the mass of molten metal in the receptacle, a layer thereof of suitable thickness immediately surrounding the core or base. Said shell further forms substantially a fluid-tight joint 'with the bottom plate 2, for which purpose said shell may have a V- shaped lower edge fitting into a corresponding circular recess 14 in plate 2. The supporting frame isthen raised from the molten metal by means of hoist 8, the shell 10 being still in its lower position. The chuck 9 is then opened, the shell 10 and its contents removed, a new casing or shell inserted in the chuck, a new object to be coated placed in the frame, and the operation is repeated. ,After sufficient time for thesetting of the molten metal has elapsed, the shell 10 is removed from the coated article, as may be done readily after the molten metal has set and cooled somewhat, and the shell may then 'be used'o'ver again.

When, as is preferably the case, the molten metal used is in the supermolten condition, only a few seconds need elapse between the lowering of the core or base into the molten metal and the dropping of the shell 10; and the core, with the shell surrounding it, should be removed from the molten metal as soon thereafter as practicable,this because only a brief contact of the molten metal, when in the supermolten condition, is required to form the alloy film which binds the core and coating together, while longer contact of the core with the supermolten coating metal may. result in too great penetration of the core by the molten metal, with consequent injury to the product.

I customarily cover all parts of the apparatus which are to be exposed to the molten metal with a protective covering, such as a plumbago paint. reason of the use of this'protective covering, and also because the metal tends to shrink away from the inner surface of the shell 10, the molten metal does.

not attack the parts of the apparatus, but attacks only the core to be coated.

6 5 When the article to be coated is not cylintherein, is lowered until immersed in the molmovable segregating "carried thereby, and

venting it from turning with respect to the shell, thus keeping said article symmetrical therewith, or equally distant therefrom at all points; one such means being duplicate centering points 7, arranged as shown in Fig. 3. Instead of employing a supporting frame for the article to be coated, said article may be secured to the center rod 5,-and may have the bottom plate 2 secured to it, as shown in Fig. 4. This is an obvious equivalent of the construction first illustrated.

What I claim is: 1. In an apparatus of the class described, the combination with means for supporting an object to be coated, and for contacting the same-with-moltemmetal, of relatively movable segregating means, adapted to operate after such contact occurs, and to segregate from such metal, a layer thereof, in immediate proximity to said object.

2. In an apparatus of the class described, the combination with means for supporting an object to be coated, and for immersing the same in molten metal, of relatively movable segregating means, adapted to operate after such contact occurs, and to segregate from such metal, a layer thereof, in immediate proximity to said object.

3. In an apparatus of the class described, the combination with means for supporting an object to be coated and for contacting the same with molten metal, of a movable casing adapted to inclose a portion of such molten metal in proximity to the surface of such object, and means for guiding and operating such casing.

4. In an apparatus of the class described, the combination with supporting means, of a casing adapted to segregate from a body 0 molten metal a layer of such metal in immediate proximity to the surface of an object to be coated, and means for operating the casing.

5. In an apparatus of the class described, thecombination with a support comprising means for holding an object to be coated, of a movable segregating casing suitably guided, and means for operating the same.

6. In an apparatus of the class described, the combination with a supporting frame comprising means for holding an object to be coated, of a movable segregating casing guided by said frame, and means for operating the same.

7. In an apparatus of the class described,

the combination with a support, of a segregating casing suitably guided, means for raising and lowering said support with the casing, and means for moving said casing with respect to the support.

8. In an'apparatus of the class described, the combination with a crosshead, a support a segregating casing movably mounted on said support, of means drical, suitable means are provided for preobject, said frame comprising an end-piece for said casing adapted to close one end thereof when said casing is moved over such object.

11. In an apparatus of the class described, the combination with supporting means provided with means for holding an object to be 20 coated, and means for contacting an object so held with molten metal, of a segregating casing adapted to inclose such object after the same has been so contacted with the molten metal, and means for operating said casmg.

12. In an apparatus of the class described, the combination with supporting means of a relatively movable holding device mounted thereon, and arranged to hold a segregating casing and means for operating the same.

In testimony whereof I afiix my signature, in the presence of two witnesses.

JOHN FERREOL MONNOT.

Vitnesses:

JNO. B. HANNUM, Jr., W. I. SCHAFFER.

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