US270898A - Power molding-machine - Google Patents

Description

(No Model.) 3 Sheets-Sheet 2.

P. s. HAWKINS.

POWER MOLDING MAOH'INE.

No. 270,898, Patented Jan.23, 1883.

L Y A L 2 F39. 2,.

v L7 1 2 I ll 2 e N. PUERS. Pholobthngnphnn wuhin mm D.C

(No Mbdel.) 3 Sheets-Sheet a.

F. S. HAWKINS.

POWER MOLDING MACHINE.

No. 270,898. Patented Jan.23,1883.

&

Nv PETERS, Fhalwumo n hun Wuhiu mm 0.0.

' UNITED STATES PATENT OFFICE.

FRANK S. HAWKINS, or WORCESTER, MASSACHUSETTS.

POWER MOLDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 270,898, dated January 23,1883.

Application filed June 16, 1882. (No model.)

To all whom it may concern:

Be it known that I, FRANK S. HAWKINS, of the city and county of Worcester, and Commonwealth of Massachusetts, have invented certain new and useful lmp'rovementsin Power Molding-Machines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being bad to the accompanying drawings, forminga part of this specification, and in whichi Figure 1 represents a top or plan view of.

my aforesaid improved power molding machine. Fig. 2 represents a side view of the machine shown in Fig. 1, lookingin the direction indicated by arrow at, same figure. Fig. 3 represents a vertical section through the machine, taken on line A A,Fig.1, looking'in the direction of arrow a, same figure. Fig. 4 represents a vertical section through a part of the machine, taken on line B A, Fig. 1,1ooking in the direction of arrow at, same figure. Fig. 5 represents a vertical section on line D D, Fig. 4, looking in the direction of arrow 0, same figure. Fig. 6 represents a top or plan view ofa part-of the. machine, which will be hereinafter more fully described, and Fig. 7

represents a front end view of the parts shown in Fig. 6, looking in the direction of arrows 01, Figs. 1, 2, and 6. Figs. 8, 9, and 10 are detail views of certainparts.

My invention relates to a machine for that class of molding in sand called snap-flask molding.

It consists in constructing and arranging the several parts of the machine so that by operating a hand-lever pressure may be applied to or withdrawn from the sand at will by steamor other power properly connected with said machine.

It also consists in the combination of a sprue-hole cutting or punching device with the aforesaid pressure mechanism, whereby the sprue-hole is automatically punched in the sand at the proper time, as will-be hereinafter more fully explained.

To enable those skilled in the art to which my invention belongs to make and use the same, I will proceed to describe it more in detail.

In the drawings, E E represent two side frames for supporting the several parts of the machine.

may be connected by means of a belt with any suitable driving mechanism. Said pulley is fitted to turn upon horizontal shaft G, which in turn is fitted to turn in suitable bearings notched hub F of driving-pulley F by means of a hand-lever, K, which is hinged to a bearin g, g, formed upon or secured to across-frame piece, L, fastened at each end to the side frames, E E. The outer end of leverKis provided with an operating-handle, K, and its inner upper end is hinged to a link-piece, K which link-piece is in turn hinged to the end of an angular forked shipping-lever, K hinged at h to a supporting part, It, extending up from cross-frame piece L. The other forked end of saidshipping-lever K is arranged in the circular groove 1, formed on the clutch I. Thus by this arrangement it will be seen that by depressing the handle K of lever K the clutch. is engaged with the notched hub F of the driving-pulley, and held there by the tilting piece'm until released by the pin it, as hereinafter described. r

The clutch is held in position against the notched hub F while the machine is in operation by means of tilting part m, pivoted near the center upon a pin, in, pointed at one end, m, and made heavier at the other end, m Said part at is supported on bearings m m, formed on frame-piece m which frame-piece forms a branch of cross-frame piece L, and is extended up to form the support and bearing H for shaftG. In this instance said frame-piece m is fastened to a part, 70, extended up from part L; but,if preferred, they may be formed in one piece. hub F of the driving-pulley the locking-pin m occupies a horizontal position, as repre- (see Figs. 3 and 4,) formed in said frame-piece.

F representsthe main driving-pulley, which' When the clutch Iis in action with the when the compressing-plate Q is in its highest position. -When the clutch is nnshipped the operating-lever K is forced up, so as to swing the upper end back, by means of a spiral spring, K. At the same time that the drivingpower is unshipped the disk J is stopped and held by a brake, K formed upon the end of a lever, K", which projects laterally from lever K, beingheld by and arranged to turn in a suitable bearing, K, at its outer end.

The parts marked M represent a metal grating, upon which is first placed a matchboard and then the pattern. The lower haltflask or "noweP is next placed in position upon the match-board and filled with sand. A bottom board, N, (having cleats M fastened to it,) the size of the inside of the nowel, is then placed over all, with the cleats on top, and the machine started by depressing the hand-lever K, which operation brings the compressing-plate Q down upon the cleats M of the bottom board N, and compresses the sand. The machine, now continuing to operate, is antomatically stopped at the end of one revolution of disk J, as elsewhere described, leaving the compressing-platein its elevated position. The nowel is now removed by hand, and the match-board then removed, which leaves the pattern 0 at the top embedded in the sand, as shown in Fig. 3 of the drawings.

Up to this point in the molding operation (except the manner of compressing the sand, as hereinafter described) the method is the same or similar to that usually employed, and I therefore make no claim thereto, except in combination with my improvements. Neither do I make any claim, in a broad sense, to a power molding-machine, as I am aware that there are several already. patented, but of different construction from. mine.

After the lower half-flask or nowel has been inverted, as before described, and the parting or dry sand sprinkled over the same to prevent adhesion, the upper half-flask or cope, P, is then arranged directly over said nowel and filled with sand. The upper halfflask or cope having been filled with sand, as aforesaid, the compressing-plate Q is now again madeto descend and compress said sand in a proper manner. At the instant when the compressing-plate Q is at its lowest position a sprue-hole cutting or punching device is brought into action by the same operation of the hand-lever K, which operation not only punches the sprue-hole, but also releases the spring 1 (see Fig.6) and allows the leversSS to engage in slots (1 g in the cope, thereby raising said cope with the compressing-plate. The pattern is now drawn out of the sand in the nowel and the machine started, which operation lowers the cope and sand in the same together and leaves them in the position shown by full lines in the drawings,the compressing plate rising into its elevated position after leaving the cope and sand, as aforesaid. The cope may now be nnfastened and swung back, when the molding operation is completed.

The compressing-plate Q and sprue-holepunching device are constructed, arranged, and operate in the following manner:

The compressing-plate Q is fastened upon its upper side to two arms or levers, QiQ, which are hinged upon a horizontal shaft,'R, fastened at each end to the side frames, E E. Said plate is raised and lowered by the operation of disk J, (which turns in the direction shown by arrows 0,) being connected with said disk by means of link-sections It, R R and R R one end of the section B being hinged to the disk near its periphery, its other end hinged to the lower ends of sections R R and upper ends of sections R R the sections R hinged at their upper ends to a strong crosspiece, It, fastened at each end to the side frames, E E, and the lower ends of the sections R hinged to the plate-holding arms Q Q. By this construction it will be seen that the greatest pressure, which is a very strong one, is produced, when it is most needed, after the plate has been nearly lowered and commences to press upon the sand.

During the operation of compressing the sand in the lower half-flask or nowel, the upper half-flask or cope is swung around (as before stated, and shown by dotted lines in Fig. 1) out of the way, being hinged at the back corners, 0 o, and fastened at the center in front by a latch device, p, to admit of this adjustment. The cope is provided with flanges P P, which extend back to form bearings for it to swing upon the shaft It. After the sand in the cope has been compressed, said cope and the compressing-plate Q are locked together, so that the cope containing the compressed sand may be raised to remove the pattern 0 by springing the outerends, q q, of the levers S S into the slots q q, formed in the ears or flanges g g at each side of the cope. (See Figs. 1, 2, 6, and 7 of the drawings.)

In Fig. 1 the locking latches or levers S S are represented as being locked into the slots g g by full lines, and by dotted lines as being disengaged or drawn out of the same. Said locking and unlocking operation is performed in the following manner: The inner end of the lever S is notched onto the end of the other lever, S, as is shown in Figs. 1 and 6, so that when said lever S is drawn forward from its inner end both levers will be operated alike. If preferred, any other similar method may be employed. The outer ends of the locking-levers are kept sprung out, as shown by full lines, except when forced back,

IIO

by means of springs r 1', fastened to the outersides of the holding-arms Q Q. They are forced back, so as to unlock the plate from the cope, by means of a lever, S which is hinged at am the inner end of the lever S. Said lever S is guided and held in position laterally by means of'guides t t, fastened to the upper side of the compressing-plate Q, and is drawn forward at the proper time by means of ahook, u, catching in the notched end S of said lever S Hook u is hinged to the lower end of a vertically-arranged swinging lever, T, which is fulcrumed to a bearing, T, on cross-frame L, and said lever T, which in this instance is angular in shape, (see Fig. 5,) is provided at its upper end with a pointed head or cam part, T which, as the disk J revolves, is struck by a cam-pin, v,which forces the upper end of the lever back into the position shown in Figs. 3

and 4 of the drawings, and thereby causeslhe locking-levers S S to bedrawn outof the slots (1 g into the positions shown by dotted lines in Fig. 1, thus releasing the cope from thecompressing-plate Q. The locking-levers S S, when drawn out of the slots g f, as before described, are held in that position by spring 1 engaging in anotch in the under side of the pulling bar or lever S The sprue-hole-punching device consists of a swinging lever, U, which is hinged at'one end upon the horizontal shaft R, and is provided at the other end with a hollow sprue cutter or puncher, V, which is adjusted to strike through the sprue-hole 10 in the compressing-plate. In this instance said spruecutter is provided with a funnel-shaped opening, 20, and projecting part 20, which strikes in the opening tu of the compressing-plate, .when it is swung down. The swinging lever U is kept in an elevated position, when not in use, by means of a spiral spring, .70, arranged over the shaft B, one end being fastened to said shaft, while the-other end is fastened to the lever. Any other similar device suitable for the purpose may be employed. Said lever U is operated to cut the sprne-hole by means of a hook, I hinged to lever T, by said hook engaging in a catch ornotch formed in the hinged pull bar or lever W, one end of the bar or lever -W being hinged to the sprue-lever U and the other end loosely supported and guided in a loop,'y, fastened .to the lower end of lever T. Lever W, being hinged to the sprueholding lever U, close to the bearing of the same, causes said lever to be swung over to punch the sprue-hole by a quick movement.

The pull-bar S is unlocked, so as to allow the levers S S to be sprung forward into the slots (1 g by springs 1'1", by the sprue-lever striking the spring 3 and forcing it down out of the notch in the under side of the bar, when said lever is swung down to cut the sprue-hole. The hooks u and y are raised and lowered so as to engage with or disengage from the notches on draw-bar S and lever W, as rc-' bearing, rod X angular plate Xfifulcrumed to the under side of the inner end of handlever K, rod X angular plate X, fulcrumed to the side of the hand-lever near its handle K, and operating-levers Y Y, which are on erated, in conjunction with hand-lever K, by forcing them toward or from the handle K, as the case may be-as, for instance, if it is required to raise hook it out of the way and dc,- press book a. the lever Y would be forced toward the handle K, as shown in the drawings, and vice versa for lowering hook to.

The part marked Z represents simplya brace to strengthen frame-piece M, which supports one end of shaft Gr.

Supposing the compressing-plate Q to be in an elevated position, the lower half-flask or nowel as having been reversed in the operation of forming a mold, as before described, the parting sand sprinkled over the same, and the upper half-flask or cope unfastened and the two halves swung out apart, as shown by dotted lines in Fig. 1. The operation of completing the mold by the use of my machine may be briefly summed up thusz' Said cope P is first swung into position and fastened and filled with sand, when the hand-lever K is then depressed, thereby causingthe compressing-plate to be lowered and the sand thereby compressed, and at the same time the sprue-hole-punching device is operated, as before described, and the spruehole punched in the sand, which at the same time locks the compressing-plate to the cope by the sprue-hole-punching lever striking the spring 1 when it descends, and thus releasing the locking-levers, so that they will spring forward'into the slots in the ears or flanges g g of the cope P. The plate Q and cope containing the compressed sand are then raised together into a nearly vertical position by the continued rotation of disk 'J. The

, poweris then automatically unshipped and the pattern removed or drawn out, as before described. The hand -lever is now depressed a third time and the lever Y (see Fig. 3) also forced toward handle K, which operation lowers the compressing-plate and cope, and at the same time releases said cope from the plate by the lever S being drawn back by hook u, as before described, and by the continued rotation of disk J the com 'iressing-plate is again raised into its original elevated position. The cope is now unfastened and swung back into the position shown by dotted lines in Fig. 1, and the nowel removed preparatory to forming the next mold.

Having described my improvements in power molding-machines, what I claim therein as new and of my invention, and desireto secure by Letters Patent, is 1. The combination of the lower half-flask or nowel, N, and the upper half-flask or cope, P, of a. power molding-machine withcompress ing-plate Q, hinged holding-arms Q Q, link sections R R, R R and R, cross-frame piece It, and the revolving disk J, substantially as and for the purpose set forth.

2. The combination of disk J, link-sections R, R R R R compressing-plate Q, cope P, nowel N, hinged arms Q Q, horizontal shaft R, andside frames, E E, substantially as shown and described, for the purpose stated.

3. The combination of the cope P, having bearings P P, hinged cornerso 0, and fastened at one side by means of a fastening device, 11, with horizontal shaft R, substantially as and for the purpose set forth.

4. The combination, with the cope P and compressing-plate Q, having a sprue-hole, 702, near the center. of the same, of hollow sprue V, its holding-lever U, shaft R, spring 00,

notched pull bar or lever W, hook y, swinging lever T, provided with pointed head T hearing T, cross-piece L, side frames, E E, pin '0, and disk J, substantially as and for the purpose set forth.

5. The combination, with the cope P, having slotted ears or flanges g of locking-levers S S, compressing-plate Q, plate-holding arms Q, Q, springs r 4", notched pull bar or lever S guides t t,spring 1 and sprue-holding lever U, substantially as and for the purpose set forth.

6. The combination, with notched pull bar or lever S of hook at, swinging lever T, provided with a pointed head, T bearing T, crosspiece L, pin 11, and revolving disk J, substantially as and for the purpose set forth.

7. The combination, with books a and y, of

rods X X, turning angular plate X swinging lever T, rod X turning angular plate X hand-lever K, rod X turning angular plate X and operating-handles Y and Y, arranged on opposite sides of the handle K, of lever K, substantially as and for the purposes set forth.

8. The combination, with the hub F, of driving-pulley F, shaft G, and spline f, of clutch I, having a circular groove, 1, angular forked lever K cross-piece L, supporting part is, link or connecting rod K hand-lever K, (provided with handle K,) and bearing g, substantially as and for the purpose set forth.

9. The combination, with angular forked lever K of tilting part m, pointed at the end m and made heavier at the other end, m tilting pin n, disk J, pivot-pin m bearings m m", angular supporting part m slotted at on, shaft G, and part k, substantially as and for the purpose set forth.

10. The combination of the cope P and nowel N, hinged arms Q Q,link-sections R R R R R, disk J, shat't G, bearings H H, their supports, and driving-pulley F, provided with notched hub F, clutch I, and its shipping-lever K substantially as shown and described, for the purpose stated.

FRANK s. HAWKINS.

W'itnesses ALBERT A. BARKER, WALTER B. NoURsE.

Images