US1338152A - Machinery for removing superfluous spelter from galvanized articles - Google Patents

Description

D. ONEIL, J. A. HOLMQUIST AND J. W. FREE. I MACHINERY FOR REMOVING SUPERFLUOUSSPELTER FROIVI GALVANIZED ARTICLES.

' APPLICATION men DEC. 21, 191-9.

1,338, 152, Patented Apr. 27, 1920.

FIGJ.

' WITNESSES I I 4,, $3253 UNITED STATES PATENT OFFICE.

DAN ONEIL, JOHN A. HOLMQUIST, AND JOHN W. FREE, OF WOODLAWN, PENNSYL-- VANIA, ASSIGNORS T0 JONES 6t LAUGHLIN STEEL COMPANY, OF 1 I'1TSBUBGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA;

MACHINERY FOR REMOVING SUPERFLUOUS- SPELTER FROM-GALVANIZED ARTICLES.

Specification'of Letters Patent.

Patented Apr. 27, 1920.

Application filed December 27, 1919. Serial Nd. 347,861.

To all whom it may concern:

Be it known that We, DAN ONEIL, J oHN A. HoLM UIs'r, and JOHN W. FREE, residing at Woodlawn, in the county of Beaver and State of Pennsylvania, citizens of the United States, have invented or discovered certaln new and useful Improvements in Machinery sion; specifically, our improved machinery finds practical use in removing from such small galvanized iron articles as nails the superfluous zinc adhering to them as they come from the galvanizing bath. Tumbling barrels and centrifugal separators have heretofore been employed for this purpose, and the machine of our present invention, differing from those in structure and operation, has for its ends an even coating of the galvanizing metal over the surface of the article and at the same time such high rapidity of production as to adapt it peculiarly well to the conditions and demands of mill practice.

Our invention is illustrated in the accompanying drawings, in which Figure 1 is a view of the machine of our invention in horizontal section, and Fig. 2 a view of it in vertical section. The plane of section of 'Fig. 2 is indicated by'the dotted line II-II, Fig. 1, and the plane of section of Fig. 1 is correspondin l illustrated by the broken dotted line IT, Fig. 2.

We shall, in the ensuing description, confine attention to the removal of superfluous zinc from newly galvanized nails ordinarily made of steel wire, but it will be understood from what has gone before that the machine is by no means limited to particular articles nor to particular materials; and we mean to bring within the scope of the ensuing claims machinery for accomplishing such separation, without the limitations of the nature su gested.

The ordinary process of galvanizing nails ,is effectedby filling a-f perforated ladlewith the uncoated nails as they come from the nail machine, dipping the filled ladle into a bath of molten zinc, and allowing it to remain in the bath for a sufiicient time for the zinc to penetrate and percolate through the mass of nails within the ladle. The ladle is then removed, and one of two methods of procedure is then ordinarily pursued either the nails are turned from the ladle .into a tumbling barrel, or the ladle itself is mounted on an axle and rotated at high speed, and the superfluous metal is thrown out through the perforations as the ladle rotates.

\Ve have found it advantageous, in this preliminary step of the procedure, to use a small ladle rather than a large one; for thus we insure rapid penetration of molten spelter throughout the whose mass of nails within the ladle, and rapid penetration of heat throughout the mass. Rapid penetration of zinc, and temperature above the melting point of zinc, rapidly attained throughout the mass, are desiderata, making for the rapid turning out of a product of good and even quality.

The mass within the ladle, on being raised from the bath of spelter, is in somewhat such condition as a mass of tooth-picks might be understood to be, after immersion, and on being lifted out of water; not only are the nails wet and coated over with zinc, but

superfluous zinc is carried in the interstices evenly coated; and such removal of super-' fluous zinc will manifestly be accomplished to advantage, if it is accomplished before the cooling zinc freezes. and solidifies the mass. Th? speed "aries according to the size of the mu 5.

The ladle full of nails is brought to a separating machine; and it is in the par-- ticular construction of the separating machine which now we are about. to describe that our invention resides. We shall describe the progress of the nails through the machine, and in the course of this description the structure of the machine in all its essential features will be, made plain. The ladle is brought to the machine, and the charge is dumped into it through a. hopper caused to rotate at a speed sufficient to effect the ends to be described. The wheel is provided with radial vanes or paddles 4:, whlch, bearing upon the dumped-in material, carry that material forward with the Wheel in its rotary course. Because of the rapid rotation of the wheel 3, the dumped-in material, acquiring rotary motion, immediately,

under centrifugal force, fiies out from the l I periphery of the wheel.

Encircling the wheel, and standing opposite its periphery with a narrow interval between, is a wall 5'; the wall is preferably, though not necessarily, ,conical in shape, and downwardlyflaring, as shown. The material thrown out from wheel 3 in the manner described strikes against this wall, and falls to the hopper 6 arranged beneath; from the hopper the material slides and is delivered to an inclined chute 7. Adjacent the delivery edge of chute 7, and spaced from it at a narrow interval, is a magnetic conveyer.

This magnetic conveyer consists of an endless belt 8 traveling on a gentle incline as shown and sustained adjacent the delivery chute 7 by a magnetized roller 14. Such magnetized rollers, and magnetic conveyers so constituted are to be had in the market, and require no detailed consideration.

By virtue of the space between the edge of chute 7 and the face of the belt 8 upon the magnetized roller ll the non-magnetic material, that'is to say, the bits of spelter, will fall by gravity, while the nails themselves, being of magnetic material, will be drawn to and cling to the belt, and will be carried by the belt 8 to the place of delivery. The chute 7 is a jig-chute, in that the material descending over it is shaken and caused to dance upon it, in consequence of rapidly repeated sharp jars or vibrations imparted to it. Our convenient arrangement in this detail is this: The chute itself, preferably formed of metal, is supported midway its length (andpreferably at that -point only) by resting ona block 9 (con venlently of wood), which block 9 is can riedpn slats 10 (also conveniently of wood). The'slats are secured at one end to the beam or sill 11' and at the other end they rest upon cams 12 borne by a rotating shaft 13.

The effect of rotation is a sharp bumping or'knockin'g which, imparted to the material descending over chute 7, causes it to dance in the manner mentioned above.

Returning now to the material charged in and tothe effect upon it of these several the effect of impact of the material slung from wheel 3 agafiist wall 5 will be to disintegrate the mass and to shake from the nails the superfluous spelter, to loosen the nails one from another, and (the temperature being now near or somewhat lower than the melting point of zinc) to permit a smooth and even and unbroken coating to harden upon each nail, while the superfluous coating metal freezes into disconnected particles. The now disintegrated mass of'solid bodies of two kinds descending, passes .over the jig-chute 7, by dancing upon this chute, the tendency of the nails to accumulate in masses is overcome, and instead the material is spread loosely over the chute. As the material passes over the edge of the chute, the nails are picked up by the magnetic conveyer, and carried away from the bits of spelter which fall from the edge of the chute.

We do not limit ourselves in the matter of detail in mechanical construction, but mean to include within the scope of the ensuing claims machinery possessing the charrating the disintegrated material, part from part, substantially as described.

2. A separator for masses of composite material partly solid and partly in course of solidification, consisting of a rotary member adapted to receive and to carry and to deliver under'centrifugal force from its periphery material fed to it in bulk, an en-' circling wall adapted to arrest the centrifugal travel of the material thrown from the rotary member and by such arrest to disintegrate the material, and means for separating the disintegrated material, part from part, substantially as described.

3. A separator for articles of magnetic material integrated with another material, consisting of means fordisintegrating the material, a jig-chute adapted to receive the material from the disintegrating means, and a magnetic conveyer arranged atan interval from the delivery edge of said chute,

substantially as described.

4:. Apparatus for separating superfluous spelter from a mass of galvanized articles of magnetic material on removal from the galvanizing bath, including a rotary member adapted to receive and to carry and to deliver under centrifugal force from its periphery material fed to it in bulk, an encircling well adapted to arrest the centrifw gal travel of the material thrown from the rotary member and by such arrest to disintegrate the material, and a-magnetic separator adapted to act upon the disintegrated material fallen from said well, substantially as described.

In testimony whereof We have hereunto 10 set our hands.

vVitnessesi L. ARTHUR WEST, FRANK HAYWARD.

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