US201636A - Improvement in-founders molding-machines - Google Patents

Description

4 Sheets-Sham 14 G. E. SMITH. Pounders MoldingMachine.

Patented March 26, 1878.

N. PETERS. PHOT0UTHDGRAFHER, WASHWGTON. n C.

4 Sheets-Sheet 2.

G. E. SMITH. Founders Molding Machine.

No. 201,636. Patented March 26,1676.

N. PETERS, PHDTOTHOGRAPNER, WASHINGTON, D C,

4 Sheets-Sheet 3 G. E. SMITH.

Founders Molding Machine.

Patented March 26,1878* N.FETERS. PHOTo-LITHOGRAPHER. WASHINGTON, D 24 4 Sheets-Sheet 4.

G. HSMITH. Fundvers Molding Machine. No. 201,636. l Patented March 26.1878.

molding-machine.

machine.

7 UNITED i STATES PATENT OEEIcE.

GEORGE E.'A SMITH, ,OE EAOINE, WISOONSIN, ASSIGNOE To WILLIAM AIKIN AND WM. WEYTE DEUMMOND, OE LOUISVILLE, KENTUCKY.

IMPROVEMENT `IN FOUNDERSV MOLDING-MACHINES.

Specification forming part of Letters Patent No. 20 [,636, dated March 26, 1878; application filed June 27, 1877. 4

Y To all whom it may concern.-

Be it known that I, GEORGE E. SMITH, of

useful Improvements `in Founders Molding- Machines,.which improvements are fully set forth in the following specification and accompanying drawings, in which latter- Figure 1 is a top view of my improved Fig. 2 is a front view and partial section of the same, showing one of the adjustable bearings in section. Fig. 3 is a vertical central longitudinal section of the Fig. 4 is aside view of the same. Fig. 5 is a plan. view of the match-plate fastened in the pivoted reversing frame. Fig. 6

is a vertical longitudinal central section ofV the same in the `line a: w of Fig. 5. Fig. 7 is a `plan view of the reversing frame with matchplate,having the drag of a ask attached to it ready for reversing. Fig. 8 is a transverse section of the reversing frame and matchplate with a pattern attached.' Fig. 9 is a transverse section of the reversing frame,

showing the same patternas in Fig. 8 at-` tached thereto by means of plaster matches,

as `hereinafter explained.

The nature of my invention consists in certain constructions, combinations, and arrangements of parts, as hereinafter fully described `and specifically claimed, whereby a pattern is rapidlyrammed or packed in the Sand,

and from `which the pattern is` accurately I drawn withoutnumerous manipulations of the molder. i

In the drawings, A represents one side of the frame of the machine, with a cross-bar, a,

`and two vertical guides, al, connected by a cross-bar, a2. The cross-bar a. contains one of the bearings of a shaft, B, which shaft is Similarly supported, near its other end, by a V.cross-bar, a, and bearing `of `another similar i side frame, A, with uguides al. Y The shaft B is operated by means of a rai dially-adjustable hand-lever, C, and is provided below eachpair of guides al with a crank, b, and a pitman, b'. The pitman b( connects the said crank with a vertioally- `sliding, block, D,.and an `adjustable bearing,

E, which are suitably iitted to and between the guides al, so as to slide up anddown upon them.

The opposin g sides of the block D and bearing E are provided with tubular projections d and e, respectively, into which the ends of a screw, F, are fitted, the one end having a left and the other a right thread, so that by turning the middle head f of said screw F either to the right or to the left the block D and bearing E are either moved toward or from each other, `and thus the stroke of the lever is lengthened or shortened, according to the height of the ask.

The bearings E support the trunnions gof the reversing frame G, which is generally of oblong shape, and has two inner reductions or steps, gl g2. Thesmaller or lower step, g2, serves as the rigid support of the match-'plateEL The larger or upper step, g, serves as the support of` a removable clamp, G', which is fastened upon the said step g1 by means ofscrews g3 or otherwise, and overlaps the same all around to the same extent as the step g2.

The match-plate H is made of the thickness of the frame G; but its edge is so trimmed as to it the space between Jthe overlapping part of the clamp Gl and the step g2. By this construction the match-plate is very firmly secured in the frame without liability ofl being mashed by undue pressure of the follower.

`The steps g1 g2 are made perfectly horizontal, so `that the match-plate, under all circumstances, even when warped, presents two parlalel and horizontal surfaces, I1. h', inthe frame G. One o f the trunnions, g, is provided with a movable shoulder, g3, made adjustable by means of a set-screw, g4, so that by bearing against the side of the bearing E it prevents lateral-lost motion of the frameG. The patterns are halved or otherwise divided for convenient molding, and the matching parts are lfastened upon the surfaces h 71. vertically opposite each other. Patterns which are not divided are successively placed in Similar positions as those divided by burying the corresponding half of it successively Ain plaster or f Sand match, which is secured in the frame G.

2 i Y l 201,636

ofthe iiask on the match-plate, and when the flasks are matched the molds of the patterns are so very near perfect as to leave no trace of the dividing-line upon the castings.

The guides I are provided with parallel plates il, which are fitted flush on the matchplate, and secured thereto by means of screws i2, and slide to or from the lask,'and hence adapt the same plate to dii'erent-sized flasks.

The frame G is provided, about the middle of each side, with one retaining hook or head,

7c, on a vertical arm, kl, which arm has a boss, K, through which a screw, k2, is passed, so as to hold it in an upright position. One of these Y hooks is always above the surfaceof the match-plate and in front of it, where the said head lc serves to clamp the end Z of a yoke L, which is laid across the bottom board N of the iask when provided with sand, previous to its being reversed, while the other end of the or swung out of the said notches when the frame G is to be turned or reversed.

By means of two cross-bars, A', which connect the two side frames A, I support the flask when reversed. I have shown the most simple and proper manner of furnishing such support by providing the cross-bars A with projections a3, upon which the cleats a of the bottom board N rest, leaving suiiicient room between them'to disconnect the yoke from the head k before the sand is pressed.

To the rear of the frame A a frame, O, is attached, which, `at its rear extremity, is p rovided with a'universal joint, o, to which the rear end' of a swinging riddle-frame, p, is secured. Near the frame G the frame O is provided with a serrated bar, 0', upon which the riddle frame p is moved forward and backward. The frame p encircles the riddle P, and holds it suspended above the frame G. In moving the riddle over the bar O its serra-Y tions cause the riddle to be shaken vertically, thus increasing its effectiveness.

Operation: The match-plate, which has the requisite patterns attached thereto, is fastened in the manner described within the frame G. The drag is placed upon the match-plate so that its projections j enter the guides i of the match-plate. through thevriddle upon the patterns and tucked by hand 5 then the drag is iilled with sand, and the sand struck oif and covered with the bottom board. The yoke L is then attached to head lo, and the free end of it held down upon the bottom board. The

pawl M is now lifted until the tooth m2 has left the notch m1 m1, whereupon the frame G is turned over and the pawl M falls into an opposite notch, m1 m1, and locks the frame in a horizontal position. Now the operator moves the hand-lever C down, thereby lowering the frame G and the drag, and when the cleats n settle upon the projections a3 of the bars A' the yoke L is relieved from the head k and allowed to drop down upon the barsA. The lever C is moved down far enough to insure the necessary packing of the sand in the drag, and then this lever is moved up again, whereby the frame G is also moved up, and the pattern drawn vertically from the sand.

The upper side of the match-board is now ready for the cope, the filling and packing of which is done precisely in the same manner as that of the drag.

When the drag or cope are joined the impressions of the patterns are so perfect that their joints are not perceptible upon the casting, and the casting is also free from imperfections which are usual in hand drawing.77 The sponging of the molded sand for preserving the consistency is here unnecessary, and consequently there are no chilled, cracked, or blistered places on the surface of such casting, all of which is due to the steady withdrawal of the patterns from the sand in a vertical direction.

In order to explain the operation of moldingwith patterns secured with plaster matches or sand matches, I have shown in Fig. 8 a transverse of a match-board, H, with a pattern, X X', secured in position, and in Fig. 9 a similar section of a match-board, H, with plaster matches y y and a pattern, Y, the latter of which is inserted into the lower plaster match y, ready for molding, and the dotted outlines above the upper plaster match y indicate its position when the other side is ready for molding. rIhe match-board H in Fig. 9 is represented in two halves, which is, however, not always necessary and works the same as one solid match-boar Aside from the greater accuracy of performance of my improved molding-machine, there are not less than thirty-seven distinct handmovements saved, which must necessarily be performed in operating with other moldingmachines with which I am acquainted.

What I claim as new, and desire to secure by Letters Patent, is

1. A reversible and vertically movable match and pressure plate, applied and oper- The first sand is now siftedating substantially as described', whereby the I sand is packed around the patterns by downward pressure while supported below, as set forth.

2. A reversible and vertically movable match and pressure plate, applied and operating substantially as described, whereby the patterns affixed to it are withdrawn upwardly from the molds and the molds are supported below during such withdrawal, as set forth.

3. A revolving or reversible and verticallysliding and pressure pattern, in combination with a stationary follow board or platform, whereby the said pattern is molded in sand by downward pressure and the mold supported below, substantially as set forth.

4. The frame G, clamp G', and match-plate H, combined, whereby the match-plate is kept rigidly in form and position, substantially as set forth.

5. A revolving vertically-sliding frame, in which patterns are supported by either. matchplates, plaster or sand matches, in combination with a platform, substantially as described.

6. The combination of the match-plate H, having triangular or V-shaped and horizontally adjusted outer guides i, and cope and drag J, having inner guides j to t the said outer guides, substantially as and for the purpose set forth.

7. The riddle P, applied to the molding-machine, and held loosely in connection therewith by a joint, as at o, whereby it is movable laterally, or up and down, or is invertible, substantially as and for the purpose described.

8. The combination, with the frame G, of

the pitmen b', the bearings E, sliding blocks D, and the screws F, having each a right screw-thread on one end and a left screwthread on the other end, whereby the stroke of the lever is regulated, or the altitude of the frame G adj usted with respect to the different heights of the ilasks or copes and drags thereof, substantially as described. 9. The frame G, havinga rim, m, and notches fm', in combination with the pawl M, having a lateral tooth, m2, whereby the said frame is permitted to be reversed, and is kept in horizontal position, substantially as described.

Witness my hand in the matter of my application for a patent on a machine for founders7 molding this 27th day yof June, A. D. 1877.

GEORGE E. sMrriai.y

Witnesses J. P. THEonoRE LANG, J oHN T. ARMs.

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