US357492A - Pipe-molding apparatus - Google Patents

Description

(No Model.) sheets-sheen 1. J. C. MGDBRMOTT. -YPIPE MOLDING APPARATUS.

AHI.) 1.

Il/Ar (No Model.)

J. C. Mc-DERMOTT.' PIPP MOLDING APPARATUS.'

PIO. 357,492.

Patented Feb. 8. 1887.

W/T/VESSES:

' ATTOH/VEY Nrrnn STATES PATENT anion.

PIPE-MOLDING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 357,492, datedrPebruary-B, 1887.

i Application filed February 11, 1886. Serial No. 191,553. (No model.)

To all whom/ it may concern.-

Beit known that l, J AMES C. MCDERMOTT, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful `Improvements in Pipe-Molding Machines;

and I do hereby declare that the following is a full, clear, and exact description of the inventiomwhich will enable others skilled in the art to whichit appertains to make and use the same, reference being had to the aecompanying drawings, and to letters of reference marked thereon, which form a part`of this speciiication.-

Heretofore it has been customary to make molds for casting iron pipe by packing the cope and drag thereof by hand or hand implements, which requires the exercise of considerable skill and much labor.

rThe object of my invention is to Vmake the molds, so far as thebuilding of the parts thereof is concerned, entirely by machinery. ThisIdo, expeditiously and thoroughly, by uniting the parts of the flask around a vertical pattern, feeding the sand into the space between the two from the top, and packing the same by means of a cylindrical packer, Awhich as it packs the sand is lifted or forced upward out of said space, substantially as hereinafter described, and as illustrated in the drawings, in which- Figure 1 is aside elevation of the apparatus embodying my invention. Fig. 2 is avertcal transversesection of the same. Fig. Sis a detail view showing the lower end ofthe cylinder surroundin g and actuating the packer.

Y Fig. 4 is a detail view showing the top end of the drag and cope. Fig. 5 shows a plan View of the iiask, showing the clamps for holding the parts together. Fig. 6 is a detail view showing a side elevation of a sprocket-wheel. Fig. 7 is a plan view of the packer, showing part of the head broken away to expose the friction-rollers. Fig. v8 is a detail View show ing the head of the packer in cross -section. Fig. 9 is a'horizontal transverse section oi' the flask when itis in position for the mold to be built therein. Fig. l0 is a detail view showing a section ofthe iiask in cross-section. Fig. 11 is a detail View showing the screw-threaded end of the packer, and Fige 12 is a vertical transverse section of the lower part of the apparatus embodying my invention.

` Reference being had to the drawings, A and A represena the drag and cope of the flask,

-havinglegs a ce projecting laterally from them,

as shown in Fig. 9, and having, vwhen closed Aand iitted together,the gates a. The parting line of the drag and cope of the flask divides the gates a', so that one half projects from and is made integral with the cope, and the other half projects from and is made integrant with the drag. A cap or cover, B, is provided for the gates a, which has a longitudinal projection, b, on its inner surface, which comes to an edge, so that it makes the opening complete to the parting line when the flask is be; f

ing built.

Vhen it is desired to ilask, the parts' thereof are placed concentric to and around the vertical stationary pattern C, the basal flanges resting on the iianges of a short cylinder, D, and the upper ends being clamped together by a clamp, c, consisting of twoarms pivoted to the vertical standard E, surrounding the flask and having their outer bund a mold in the ends bolted together, as shown in Fig. 5. The

cylinder D is scoured to and supported by standardE, and has its lower end flanged. Suitably secured to this iange is the flange on the lower end of the pattern C. When it is desired to build the mold, the cylindrical packer F, which is suitably and concentrically vsuspended above the ask, Vis lowered down into the space between the pattern and iiask until it reaches a point near the hub of the pattern. The sand is then fedV to the flask from a conical-shaped hopper located above, surrounding the packer, and secured to the vertical standard in such a manner as to be capable of a limited vertical adjustment, as will be more fully explained hereinafter.

The packer F Vis provided with a screwthread or spiral flange around its lower end, so that as the sand is fed to the flaskV it revolves in such direction as to pack the sand and at the saine time lift itselfv out of the same. The packer F is suspended by means'of a suitable rope, chain, or cable, d, which passes over .a pulley, c, having bearings in a frame or ICO standard E, and having a counter-weight, d', on its other end. In order to permit the revolving :motion of the packer without twisting the chain or cable d, I provide a circular plate, g, having a central stud projecting up through a corresponding aperture in said head, to the upper end of which said cable or rope is attached. Between the plate g and the inner surface of the head of the packer I place small friction-rollers, thus permitting the revolutions of the packer without generating friction.

In order to revolve the packer when it is desired to build the mold in the manner just explained, I surround it with a drum, G,whieh is provided with annular flanges It h at its top, and about one-quarter its length above its lower end, which latter is just about on the plane or just above the plane ofthe mouth of the hopper. These ilanges rest on frictionrollers, which have bearings in 4suitable recesses or channels in rings l', surrounding the drum and secured permanently to the standard E.

Surrounding the drum Giust above, or inade integrant with the lower iiange, h., is a beveled gear, H, which is engaged by a beveled pinion on the end ofthe drive-shaft J, the contiguous end of which is preferably journaled l in the bearings in the standard, and the other in the end of au upright arm of a frame se cured to and projecting from said standard. Shaft J is provided with a nest of pulleys on its outer end, which are connected by suitable belting to the main shaft. Arranged diametrica-lly opposite each other on the inner cir cumference of the drum are the longitudinal iianges L 7i', and projecting from the head of the packer are the lugs 7J, which, when the drum turns, are struck by the flanges 7c, thus carrying the packer around with it, and at the same time permitting the packer to move vertically. c If desired, lugs Zz may, as shown inFigs. 7 and S, have friction-rollers journaled in their ends, and I prefer them this way, as less friction is generated when the packer moves vertically.

I represents a vertical shaft, the upper end of which has bearings in the same frame as has the outer end of the drivcshaft J and the lower end of which is suitably journaled in a frame projecting horizontally from said standard. It derives motion by means of beveled gearing from the drive-shaft, and has a beveled gear on its lower end, which imparts motion by means of a similar gear to the companion part of clutch K. The clutch K has a longitudinal motion on shaft L by reason lof a feather on the same, and its edges and the engaging edges of the companion part are serrated, as shown, so that when brought together they lock. Then thus locked, the companion part imparts its motion to the clutch K, and througlrit moves the shaft L.

The clutch K is reciprocated automatically by the bifurcated arm m, the extremities of which latter enter the annular groove in the body of said clutch. This arm my is secured t0 the center of length of a lever inlcrumed about its center to a lug projecting from the standard E. The ends of this lever are connected by means of connecting-rods a a to a crank and double crank, respectively, extending in diainetricallyopposite directions from the shaft N, jonrnaled in the standard E, and a frame secured to and projecting from the same above the plane of the upper end of the drum, so that its outer end will come about over the vertical center of the packer.

0n the end of crank-shaft N is a sprocket wheel, O, the arms of the bifnrcated sprockets of which pass on either side of cable d. When the packer is about leaving the ilask,tl1e bnttous o o on the cabledocatcd with reference to this purpose, catch in the arms of the sprockets and turn the crank-shaft sufficient to actuateV the connecting-rods and throw the clutch K into engagement with its companion part, thus imparting motion to shaft L. Sprocket O is loose on theshaftand can turn freely when the packer is being lowered; but when the packer is raised and the buttons, as explained, reverse the motion of the sprocket-wheel, it turns the shaft N by means of a ratchet, a', snug against its side and fast to said crankshaft, and pawls ou theA adjacent face of the sprocket, arranged in such position that they engage said ratchet. When the shaft L is thus set in motion, the cams r r, fast to sleeves 5 i thereon, bear against the u nder side of a crossbar, yr', and raise the same. I make in said cams diametrical slots 2 2, and instead of male' ing them fast to the said shaft L,secure them, by means of bolts 3 3, passing through slots 2 2, to the contiguous eccentric circular flanges 4 4 of sleeves 5 5, fast on said shaft. rlhus the cams r can be so adjusted as to increase their eccentricity and raise bar r higher. Secured to the ends oi' thisbar are vertical studs, which pass through suitable apertures in the lower flange of the pattern, into the space between the same and the flask, Where they have secured to them a ring, It. This ring fits the space laterally between the pattern and flask, and as it is forced up packs the sand between it and the lowest point the packer reaches, thus completing the packing of the sand in the flask. Surrounding the studs, supporting the ring between the cross-bar r and the flanged lower end ofthe pattern,are coilsprings,which assist the bar to return to its original position. Vhen the mold is made, the ncxtthing to do is to separate the drag and cope for the reception of the core, and preparatory to this y"the sand on the parting line must be cut or divided. In order to do this,immediately after the completion of the mold I offset the shaft L between cams r r, so as to make an eccentric, r2.

Journaled on the eccentric r2 is a pit-inan,R, the other end of which is pivotally connected IOO IIO

IIS

i i tern.

mold is being made.

to the links t. These links extend vertically np into the bore of the pattern, and have connected to them at one angle the bell-cranks S, which are fulcrumed at another angle to a boss projecting inward from the pattern, and the remaining angle of each of said bell-cranks is pivotally connected to a vertical knife, s. There are two knives s.Y Before they reciprocate laterally to divide the sand, as will hereinafter be more fully explained, these knives stand side by sidev diametrically within said pattern C, their inner` edges lapping past each other-and their outer edges occupying and lling completely the longitudinal slots placed diametrically opposite each other in the pat- One rod of link t travels vertically within the hollow pattern on one side of the knives and the other rod on the opposite side. Both are so connected to the crank S, which pivotally connects them to the knives s, that when said links are drawn down they Aforce the knives radially outward through the longitudinal slots in the pattern in directions diametrically opposite each other to the shell of the iiasks, thus dividing the sand. These knives are quite thin, so that when they divide the sand they leave but a narrow korf.

This kerf would,when the cope and drag were clamped together, ordinarilyleave an opening, which, when the casting was made, would make a fin on the pipe. In order to avoid this, I place a thin strip of metal about the thickness of theknives s, conforming tothe shape of the meeting edges of the cope and drag, and place it between them when the When the flask proper is put up preparatory to casting, this strip of metal is omitted. The knives have a perfectlyhorizontal movement by reason of studs t t. Permanently secured fiat against said knives s,in lateral alignment withthe gates of tlie flask, are flat stripsof metal S', of the same thickness and depth as the said knives, and as long, say, as the blade of caps B. The slots in the pattern in register with these strips S are made correspondingly wider to accommodate their passage in and out with the knives. Thus when the said knives are reciprocated to cut the sand the kerf is made wider at the transverse plane ofthe knives, so that when the iiask is finally set up, ready for the process of casting, the openings made by the caps B of the said gates and the blades b thereof' are connected with the castiugchamber surrounding the core.

The lower end of the'packer is beveled, and

' by vertically adjusting the hopper [can regulate the iiow of sand into the flask. This'vertical adjustment can be accomplished in many ways; but I prefer the way shown in Fig. 2. By referring to said Fig. 2 it will be observed that this hopper 4 is supported by means of a vertical screw,5,the threaded portion of which passes through correspondingly-tapped lugs projecting from said hopper, and which has loearin gs in lugs 6 6, projecting laterally toward the hopper from standard E. This screw 5 is threaded between its bearings, and by revolving it, through the medium of a handle or other suitable mechanism,thehopper can be adjusted vertically.

The sand may be elevated into the hopper f by hand or n'iachinery, either way being possible.

Ido not wish to be confined to matters of detail in the construction of my invention, as described and shown, for it is believed these may be departed from without affecting the merits or principle of my invention. y The operation of my machine is substantially as follows: The cope and drag are placed upon the cylinder D, so that they surround the pattern C, and so that the protuberances projecting from their basal flanges may enter suitable recesses or apertures in the contiguous flanges of said cylinder, as shown in Fig. 4t. They are then clamped together, care being rst taken to adjust the caps lof the gates so that thedividing blades thereof come between the contiguous edges of the projecting portions forming the gates of the flasks, and to adjust between the meeting edges of the cope and drag diametrically opposite the gates a thin strip of metal the thickness of knives s s. This operation of the meeting edges of the cope and drag allows for the kerf of the knives, so that afterward, when the iiask is ready for use, the sand in the cope and drag is. brought close together and forms one complete mold. l When the cope and drag are placed in position, as aforesaid, the hopper is supplied with sand, which immediately gravitates down into the space between the pattern and cope and drag. At the same time the packer (which has previously been lowered into said space) is revolved. thus slowly packing the sand as it is poured into it from above.

If the sand should flow too fast, the hop-A per is adjusted vertically, so that the beveled edges of the drum G close the mouth of said hopper and limit the fiow of sand. Then the packer has screwed itself up out of the flask, the button 0 on the cable, by which said packer is suspended, engages the sprockets of the sprocket-wheel O and revolves it sufficiently to actuate rods n n. K, so as to impart the motionY of shaft Ito. shaft L, and shaft L, through the medium of camsfr r, pushes the ring B up so as to pack the sand in the lower part of the ask. As the ring It withdraws the eccentric r2 of shaft L operates the knives through the medium of IOO These rods shift clutch pitman It', links tt, and bell-cranks S, so that,

ing legs a and bosses a a, which form a fiask having gates, as set forth.

2. In a pipe-molding machine, the con1bination of cope A and drag A', having legs a a, gates a a', cover B, and pattern C, as set forth.

3. The combination, in. a pipe-molding machine, of the drag and cope a`nd pattern C, with the packer F, operating as described, shaft L, cams i* 1, cross-bar 1", having Vertical studs projecting therefrom, and ring R, Substantially as and for the purpose set forth.

4. The combination, in a pipe-n1olding machine, of the drag and cope and pattern C, with the packer F and ring R, operating as described, shaft L, having eccentric 7'?, pitman R', links t 1, bell-cranks S, and knives ss, substantially as and for the purpose set forth. l

-and A and pattern C, of the 1atera11y-recip rocating,` knives s s, bell-cranks S, links t, and means for operating the same.

In testimony that I claim the foregoing as my own I hereunto affix my signature in presi ence of two witnesses.

JAMES C. MCDERMOIT.

Vitnesses:

JAMES H. CoYNii, FRANK D. THoMAsoN.

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