US172044A - Improvement in machines for casting metals - Google Patents

Description

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J. B. McCUNE. I

v MACHINE FOR CASTING METALS.

i No.172,044. Patented Jan. 11, 187-6 u lnueuton gfiii;

. .PEfESiS, PNDTO-LIYHOGRAPHERQ WASHINGTON D G.

, Z Sheets-SheetZ J. B'. McCUNE. MACHINE Eon cAsTITNG METALS. v No.172,044. Patented Jan.1 1,1B76.

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UNITED STATES PATENT Orrron JOSEPH B. MOCUNE, OF HAMILTOLT, CANADA, ASSIGNOR OF ONE-HALF HIS RIGHT TO RICHARD MOTT WANZER, OF SAME PLACE.

IMPROVEMENT IN MACHINES FOR CASTING METALS.

Specification forming part of Letters Patent No. 1 72.044, dated January 11, 1876; application. filed April 2, 1875.

To allwhom it may concern Be it known that I, J osErH BURT MoOUNE, of the city of Hamilton, in the county of Wentworth,in the Province of Ontario, Dominion of Canada, have invented a Combined Ramrning and'Molding Machine for Metal Castings; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same.

. Referring to. the accompanying drawings, Figure 1, Sheet 1, is a front view of the machine. Fig. 2, Sheet 1, is a top view of the same. Fig. 3, Sheet 2, is a side view of the machine. Fig. 4, Sheet 2, represents a top view, showing the pattern in the flask, and the swinging bracket swung round to the hack of the machine.

. A represents the base of the machine. B B are two grooved. upright standards, properly secured to the said base. C C is a movable sliding frame, composed of upright and cross pieces. 0 c are the upright parts, which slide in the grooves of the standards. C C are the cross-pieces, and'D D are the short uprights, to which the plate E is secured. This plate is made fast to the movable frame, but at the same time is adjustable, so that it may at any time be easily removed and replaced by another and similar one, but for a different It is arranged and fastened as follows: There are two latches, P P, properly secured to the two sides. respectively, of the said plate E, as partially shown in Fig. 3, Sheet 2, which, when turned inward against the under side of the curved upright supports D D, firmly hold the said plate in proper position. It also receives the additional security of the use of two dowel-pins made to pass through it into the uprights D D. F is a movable plunger in the center of the machine, made to slide through openings cut in the cross-pieces C and C audit is made to move vertically independent of the movable sliding frame 0 C. On its extreme top is fastened a flat plate, G, upon which is secured. in proper position one half of a split pattern, H, to

mold, or it may be in some cases a whole pat- I tern. If thepattern is to be drawn in halves,

then one half of the pattern is secured to the said plate. If a pattern is not drawn or molded in halves, then the whole pattern is fastened to it. I represents one half of a flask placed upon the top of the pattern-plate E, and made to surround the pattern, when it is ready to be molded. The cope of the flask is kept in its position from moving from side to side by means of the ordinary flask-pins entering holes to correspond in the plate E on one machine, and the eyes on the nowel or other half of the flask are made for pins to enter, which are set in the plate of another and similar machine. J is a handlever, one end at tached to a projection, K, said projection be ing. affixed to one of the uprights of the frame 0. It is also attached by a screw or pin to the upright plunger F at the point 01, and its extreme upper end is held in its place by the catch L, as shown in Fig. 1, the machine then being in the position ready for the operation of molding. By releasing the said lever from the catch L, the whole of the frame, composed of the pieces heretofore mentioned, slides down ward in the grooves of the standards, and, by the same movement, draws the pattern downward from and out of the sand in the flask I. L is an upright rod or post affixed to the brace A, and is supported by the arch M, said arch being secured to the standards B B. It is also further securely fixed in position by means of the plate N. The principal object of the said rod is to carry a swinging bracket, 0, which is for the purpose of ramming or packing the sand in the flask. It consists of a frame provided with two lugs, e 6, through which holes are drilled for the said rod L to pass through. lts lower portion consists of a plate, 0, which is made a trifle less than the inside of the flask. P P are latches, fastened to the under part of the plate E, and are for the purpose of securing the said plate to the uprights D D.

The object of constructing the said latches in this manner is to afford a convenient and quick method of removing the plate E, so as tosubstitute another of different design and pattern, as each pattern requires a plate constructed for itself. An opening in the plate is made to correspond exactly with the form of the pattern, which is made to pass through the said opening as far as necessary, as will be explained hereinafter.

. Q is a horizontal rocker-bar, resting in grooves ff on the sides of the base A, and is provided with'two projecting points, b b, firinly affixed thereto. R R are two rods, the base of each being hollowed or capped out, and made to rest upon the points b b. The upper ends of said rods are pointed, and are made to pass into openings on the under side of the lower cross-piece of the sliding frame. By this means a connection is formed with the rocker-bar and the sliding frame, for pushing it .up when the sand, is to be rammed in a flask. This is done by means of the hand-lever S on the right side, which, is attached to the end of the rocker-bar.

, By moving the said lever forward, an upward movement is given the projecting points b b, and through them to the rods R R, which raise the whole sliding frame 0, with the flask, up against the rammer 0, when the sand is to be packed in the flask. g p T T are the upright grooves cut in the standards B B, into which the frame 0 slides. The operation of the machine is as follows: The lever J is raised and locked on the latch L, which brings the pattern Hup through its corresponding opening cut in the plate E, of the same size and shape as the pattern, and closely. fitting it. One half of the flask I is then placed upon the plate E, and secured in position by means of the flask-pins entering holes made in the proper place in the said plate E. The flask is then filled with loose sand, and struck ofi level with the top of the flask. A bottom board, which is made to fit the inside of the flask, is then placed upon it, and the swinging bracket 0, which has been swung out of the way of the flask, as shown in Fig. 4, is then brought round into position immediately over the center of the flask. The operator then grasps the handle of the lever S and draws it forward, which produces the efiect of raising the whole frame, flask,'and sand up against the swinging bracket 0, and thereby pressing the sand sufficiently firm in the flask and around the pattern as well as, if not better than, when done in the ordinary way by hand. In fact, I think the work is preferable to that done by hand, as the sand in the flask is pressed by an equal and uniform upward pressure, which packs the sand closely around the pattern where it is wanted, whereas by handramming, in the ordinary way, the sand is apt to be packed loosely at the pattern and too solid at the top of the flask-a condition of things which will produce rough-edged castings, and ought, by all means, to be avoided.

The next operation is to draw the pattern from the sand, which is easily and correctly molded in another and similar machine, oper-.

ated in the same way. The two halves are then placed together, the sprues removed, and gutters cut, as is usual in the ordinary method of molding, and clamped, when the flask is then ready to receive the molten metal.

It will be observed that I construct the-pattern-plates E in such a manner that when the two halves of the molds are placed together the edges of both come perfectly true and correct, and will produce castings so smooth that'the parting-edge will not be visible upon them, and the manner I construct said pattern-plates may be described as follows: For

half-patterns, forming the mold in two parts, the first operation is to plane the surface of each plate true and parallel. They are then placed together, and holes drilled through both for guide -pins for the flask, in any required position to suit the size of the flask. They are then pinned together, and the form of the pattern is then worked out through both plates alike, while they are so bound and held together that the openings are made exactly the same size and form in each, so that although the two halves are molded on separate machines, when they are placed together they are a perfect match, and come out right with every operation. 1

The advantages of the draw part of the machine-that is, drawing the pattern downward from the sand-are producing a mold that is the exact size and form of the pattern, as it is done without rapping or loosening the pattern; and the ramming part is for produc-' ing an equal and uniform packing or ramming of the sand in the flask. A large percentage of time is saved by the operation; and, further, the work of molding with my combination machine, as just described, does not require skilled labor, and the quality of castings is as-good as, if not better than, those produced by the best skilled hand-labor in the ordinaryway of molding.

What I' claim as my invention is 1. In a machine for molding metal castings,

a vertically-sliding frame carrying a top-plate, v

E, and a flask, I, and a verticallymovable plunger for carrying the pattern, and a rammer arranged 'above the flask, the whole constructed substantially as described, whereby the sliding frame and flask can be forced upward against the rammer for ramming the sand in the flask, andafter the sand isrammed the plunger and pattern can be moved down ward independent of the frame and flask, to'

remove the pattern, as set forth.

2. The combination, with a molding-flask constructed to have a vertical movement imand the sliding frameG C, substantially as and,

parted to it, of a swinging rammerbracket for the purpose described. arranged upon a vertical standard, for press- Dated at Hamilton, Canada, this 18th day .ing the sand when the flask is raised, substanof February, A. D. 1875.

tiallyas described. JOSEPH BURT MGGUNE.

3. The combination of the upright rod L, Signed in presence of having the collars a a, the swinging bracket WM. BRUCE, or rammer 0, arranged between said collars, 1?. LE; SCRIVEN.

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