US714285A - Molding-machine. - Google Patents

Description

No. 714,285. Patenied Nov. 25, 1902.5 c. m. DAY & J. ANDERSON.

.mouima MACHINE.

(Application filed. Oct. 21, 1901.)

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mus Pi I'ERS 00,. moroumcn wnsnmmo No. 714,285, r Patented Nov. 25, I902.

A c. M. DAY & JQANDERSON.

momme'mcnms.

(Appliclflon filed Oct. 81, 1901.) (No Model.) 2 shuts-shes; 2:.

UN TED TATES ATENT F CHARLES M. DAY ANnJOI-IN ANDERSON,-OF HOPEDALE, MAsSAoHUSETTs,

ASSIGNORS To DRAPER COMPANY, OF PORTLAND, MAINE, AND HOPE- DALE, MASSACHUSETTS. I

MOLDING- MACHINE.

V SPECIFICATION forming part of Letters Patent No. 714,285, dated. November 25, 1902.

Application filed October 21,190}. Serial No. 79,327. (No model.)

To whom it y OOYWZYW position every time a mold is made on the Be it known that we, CHARLES M. DAY and machine, and means must be provided to com- JOHNANDERSON,citiZenS ofthe United States, pensate for wear of the moving parts of the and residents of Hopedale, in the county of machine in order that this definite and fixed Worcester and State of Massachusetts, have operative position of the pattern may always invented an Improvement in Molding-Mabe secured. chines, of which the following description, in Our present invention relates to moldingconnection with the accompanying drawings, machines of the type hereinbefore referred is a specification, like characters on the drawto; and it has for one of its objects the proro ings representing like parts. ductionof means for eifecting a smooth and In a certaintype of apparatus for facilitatsteady movement of the pattern absolutely ing the constructionof moldsfor metal-foundat right angles to the face of the strippering the drag is made by placing the flask on plate when the pattern is drawn. i a stripper-plate firmly supported on a suit Another object of our invention is the pro- 15 able frame, said plate having apertures therevision of means for attaining the exact and in for the different parts of the pattern to exdefinite positioning of the pattern relative to tend through and project above the face of the stripper-plate when the mold is being conthe stripper-plate, the latter providing for the structed, compensating for wear of the movparting face of the mold. The pattern is ing parts of the machine or for any slight va- 20 mounted on a carrier or support which is riation in the thickness of the stripper-plate. 7o movable toward and away from the stripper- Other-objects of our invention relate to the plate, and when the, pattern is in operative enlargement of the character of work which position relative to the stripper-plate the may be performed by a given machine, the molder fills the flask thereon With sand and improvement and simplification of the me- 25 rams it in usual manner. When the drag is chanical structure thereof, and increased effinished, the carrier is moved awayfrom the ficiency and facility of operation. stripper-plate to thereby draw the pattern The various novel features of our invention from the drag, as it is technically termed, and will be fully described in the following specithe latter is lifted off and turnedoverin readification and particularly pointed out in the 0 ness to receive the cope, which may be consubjoined claims. structed on a similar machine or on what is Figure 1 is afront elevation, partly broken technically termed. a flat-back. A flatout, of a molding-machine comprehending back is a fiat plate with such portions of a one embodiment of ourinvention, the strippattern rigidlysecured thereto as can be readper and pattern plates being omitted. Fig.

5 ily drawn from the mold. 2 is a right-hand end elevation thereof partly In order to produce accurate work with such broken out and in section. Fig. 3 is a detail, molding-machines, it is absolutely necessary partly insection, on the line 3 3, Fig. 2, lookthat the pattern coact preciselywith the apingtoward the right and showing a portion ertured stripper-plate during the formation of the mechanism for operating the pattern- 40 of the mold, and when the pattern is drawn plate carrier. Fig. 4 is a horizontal section from the mold its movement away from the through the base of the carrier. and the adstripper-plate must. be smooth and even and justable connection between it and the opat right angles thereto or the fine outlines of crating means, taken on the line 4 4:, Fig. 2. the mold will be damaged. Fig. 5 is a topor plan view of the frame of 5 Again, a molding-machine of the type rethe molding-machine shown in Figs. land 2, 5

ferred to is commonly used in connection with omitting the pattern-plate carrier, the stripa large number of patterns and their correper and pattern plates and stoolplate also spending stripper-plates, and as the latter being omitted; and Fig. 6 is a perspective are preferably made of a standard thickness viewof the pattern-plate carrier detached.

50 the pattern-plate must be moved into a fixed In the drawings the stripper and pattern plates are omitted, though their position is indicated in dotted lines, Fig. 2, and the pattern-plate carrier is shown in its operative position. We have herein shown the frame supported upon and rigidly secured to two like ends A A of suitable size and shape to properly and firmly support the superstructure and the operating parts of the machine, the superstucture or upper part of the frame consisting of F'l-shaped front and back portions, Figs. 1 and 2, connected by a gridlike base. The front and back pieces comprise horizontal and parallel heads A and depending legs A the heads forming 'a support for the stripper-plate, (partly indicated by dotted lines at S, Fig. 2,) the lower ends of the legs being cast integral with the base, which comprises transverse end bars A, intermcdiates a, and longitudinal webs a the longitudinal tops 0, of which project above the end and intermediate bars A and a, as clearly shown in Fig. 2, for a purpose to be described. The heads A are each provided with a centrally-located and external boss A each of which has rigidly secured to it a depending guideway, (shown as a large and preferably cylindrical bar A,) which extends downward nearly to the bottom of the frame taken as a whole, and heavy brackets A bolted to the grid-like base of the superstructure,have large hubs A to embrace the guideways and support them at their lower portions. These oppositely-located and parallel guideways outside the front and back pieces of the frame constitute rigid bearings for the pattern-plate carrier, to be described, and guide it in its movement up and down in the operation of the machine.

Referring to Fig. 2, it will be seen that the upper portion of the frame is open at its ends, so that a stripper-plate much longer than the heads or supports A maybe used with acorresponding pattern-plate, the open ends of the frame permitting the use of a pattern-plate of any length within reasonable limits. This is a very important and valuable feature of our invention, as the scope of the work of a given machine is thereby greatly extended, it being manifest that the length of the pattern to be used is only limited by the inherent strength and'rigidity of the stripper and pattern plates necessary therefor. 1

The pattern -plate, by which term we mean a suitable metallic plate to which is secured the pattern or parts thereof which project through openings in the stripper-plate during the formation of the mold, is mounted n pon a vertically-movable carrier, and herein the carrieris shown as substantially U-shaped (see-particularly Fig. 6) and comprising upright arms 0, connected at their lower ends by a transverse base portion O the tops of the arms being laterally extended or made T- shaped, as at O, to constitute parallel supports, on which the pattern-plate P (partly shown in dotted lines, Fig. 2) will be supported and secured, the carrier being movable points of support-via, the guideways vertically within the frame of the machine, as clearly shown in Fig. 2, and the carrier is slidably connected with the guideways by heavy hubs c c at the lower and upper ends of the arms, respectively, and projecting outwardly therefrom, the said hubs having a sliding fit on the guideways A The width of the pattern-plate is of course limited by the space between the stripperplate supports A ,.as will be manifest from Fig. 2; but, as has been stated, the length of the pattern-plate is not restricted to the length of the machine-frame from end to end, as the extended ends of the pattern-plate may project as far as is necessary or desirable beyond the open ends of the frame.

The guideways support the carrier at its upper and lower portions and'on opposite sides thereof, and the actuating means for the carrier is connected with the latter between its and at the lower portion of the carrier, thus greatly economizing space and also permitting a stoolplate to be employed when molds are being made requiring the use of stools.

The stool-plate, if one be used, and which may be of usual construction, is not herein shown, is supported on the upper faces a of the webs a and by making the stool-support as a plurality of narrow longitudinal surfaces we are enabled to reduce the machining or planing of these surfaces to a very material extent.

It will be manifest that the stool-plate may extend as far beyond the ends'of the frame as necessary to correspond to any given pattern and stripper-plates, although for such extended stool-plate a slightly-different form of actuating-handle will have to be used, to be referred to hereinafter.

The grid-like base of the superstructure is provided with depending lugs of, (see Fig. 1,) which form bearings for an operating rockshaft D, extended in the direction of the length of the machine and projecting beyond one of the end frames, as shown in Figs. 1 and 2, said shaft being shown in Fig. 3 as provided with a pair of crank-arms d, rigidly secured thereto and connected by a crank-pin d which is extended through the upper end of a bent link D the lower end thereof being pivotally connected with the pattern-plate carrier at or near the base thereof and symmetrically between its supportingguideways, the link moving in a vertical plane intersecting the base and the upright arms to prevent any twisting of the carrier when it is moved.

Referring to Figs. 4 and 6, the central portion of the carrier-base C is enlarged, as at 0 and provided with an elongated aperture 0*, a pivot-pin 0 Fig. 4., being passed transversely through the sides of the enlargement 0 and held from rotation by a set-screw 10, Fig. Within the opening 0 an eccentric c is loosely mounted on the pivot-pin 0 the periphery of the eccentric being embraced by IIC the split end (1 of the link, and said split end is adapted to be clamped tightly uponthe eccentric by means of a suitable clampingbolt Z engaging the threaded ears (1 of the split portion. One end of the eccentric is herein shown as made polygonal, as at 0 outside of the end of the link and between H the latter and one of the sides of the extension 0 of the carrier-base.

. From the foregoing description and from the drawings it will be manifest that by rotating the actuating-shaft D in the direction offithe arrow 6, Fig. 2, the link D will be swung to the left and downward, efiecting the downstroke of the carrier from the position. shown in the drawings and when the machine is in use operating-to draw the patunless some means he provided to compen sate for such wean. This compensation in our present invention is provided for by the adjustable connection between the link and the carrier, as by loosening the split end (1 of the link the eccentric 0 can be turned in i one direction or the other to accurately position the top of the carrier, the rotative movement of the.eccentric being readily effected by a wrench or spanner applied to the polygonal portion 0 thereof, and after the adjustment has been effected the clamp-bolt (Z will be set up to tightly clamp the eccentric and link immovably together.

When thecarrier is elevated, as shown in the drawings, the upper pivot d will be off center relative to the actuating-shaft, anda stop 15 (see dotted lines, Fig. 2, and fulllines,

Fig. is preferably provided to limit further throw of the crank-arms d to the right.

The carrier is herein shown as provided with a stiffening-web 0 (see dotted lines. Fig.

2,and full lines, Fig. 6,) and a short depending connection 0 extends from the stiffening-web to the base O adjacent the enlargement c of the latter.

The downward stroke or draw of the carrier is determined by means now to be described, and such means is made readily and accurately adjustable, so that the draw may be varied according to the character of the .pattern,some patterns requiring a greater downwardmovement of the carrier than others in order to properly separate them from thestripper-plate after theyhave been drawn from the mold. A hub 61 having aradial socket (1 for the operating handle or bar 61 is rigidly secured to the projectingend of the actuating-shaft D, and said hub has an annular enlargement 01 which is surrounded by a split collar d adapted to be clamped upon the hub enlargement by a suitable clamp-bolt d extended through threaded holes in the adjacent ends of the collar. One of these ends, as d", is shouldered at its end and is adapted to engage a fixed lug or stop 30 on one of the base-bars A of the frame superstructure. Now when the mold has been completed and the molder is ready to draw the pattern he grasps the handle or bar d and pulls it toward the front of the frame, thereby rotating the actuating-shaft D in the direction of the arrow 6, Fig. 2, to lower the carrier, as has been described, and after the pivotal connection cZ between the link and the crank-arms d has passed deadcenter the weight of the carrier and the pattern-plate attached thereto will tend to complete the downward movement of the carrier, and such movement will continue until the part (1 of the clamp-collar d brings up against the stop 30.

To vary the draw or downward movement of the carrier just described, it is only necessary to slacken up the clamp-screw c1 and turn the collar 01 in one direction or the other and then tighten the collar when the shoulder (1 is in the desired position, and it will be noted that this adjustment can be made with the greatest nicety necessary or desirable. So, too, the means provided for adjusting the connection between the link and the carrier can be varied to a hairs breadth, if desired, this perfection of adjustment in the latter case being of great importance.

We have herein shown sheet-metal guards G secured to the bosses A and hubs A and extending well around the vertical guideways A to protect the same from sand during the construction of the mold-,these guards by keeping the sand away from the guideway and from the cooperating hubs on the carrier reducing very greatly the wear of such parts. i

Sometimes sand will drop down from the top into the machine, and to direct the same away from the guideway we have herein shown the upright arms 0 of the carriage as provided with inclined openings 0 the upper ends of which are between the T-shaped portions 0 and the adjacent hubs c, :any sand dropping down on this part of the machine falling into the chutes or openings c and being directed by the inclined bottoms thereof toward the interior of the machine and away from the guideways. We also prefer to bevel the tops of the guide-hubs c c to aid in shedding sand should any accidentally fall thereupon.

Referring to Fig. 2, it will be noticed that at all times the operating mechanism is located supports 01, so that no matter what the shape of the stool-plate or its length the carrier-acbelow the horizontal plane of the stool-plate tuating mechanism will be below the same and will never interfere with it, and consequently the length of the stool-plate is not restricted in any manner by the structure of the machine.

If a long stool-plate and corresponding stripper and pattern plates be used, the actuating handle or bar (Z will be removed and a bent bar used instead to clear the projecting ends of the plates.

It will be noticed that the point of application of the actuating means on the carriage is so located that the movement of the latter either toward or away from the strippenplate will be even and uniform, the draft being equally distributed throughout the carrier, and this, in connection with the guideways, provides for an absolutely steady and smooth movement of the carrier and insures the maintenance of the pattern-plate in a true horizontal position absolutely parallel with the face of the stripper-plate.

In Figs. 1 and 2 we have shown strong spiral springs S attached at their ends to the upper part of the main supporting-frameand secured at their lower ends to hooks 90 on the central portion of the carrier-base O such springs compensating in a measure for the weight of the carrier and the parts movable therewith and rendering the manual operation of the apparatus easier for the molder.

Referring to Fig. 2, it will be seen that the actuating force is transmitted from the operating shaft D to the pattern carrier through the link D the lower end of the latter being connected with the carrier midway between its sides and similarly relatively to the ends thereof in order that the draft of the carrier shall be central and the power applied uniformly to the different portions of the carrier.

In order to secure as direct transmission as possiblefrom the shaft D to the carrier and as nearly as may be in a vertical direction, the shaft is located above the pivot-pin and as nearly vertical over it as convenient, and the curvature of the upper end of the link permits this positioning of the operating-shaft D.

Our invention is not restricted to the precise construction and arrangement of .one practical embodiment thereof herein shown and described, as the same may be modified or rearranged without departing from the spirit and scope of our invention.

Having described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. In a molding-machine, an open-ended frame having parallel portions at its top to support a stripper-plate, vertical, oppositelylocated guideways on and wholly exterior to the frame, at its front and back and substantially midway between its ends, a carrier for the pattern-plate, hub-like extensions on the carrier at its top and bottom and projecting outward beyond the front and back of the frame, to embrace and move vertically on the guideways, and means to actuate the carrier, the open ends of the frame permitting the use of stripper and pattern plates longer than the frame.

2. In a molding-machine, an open-ended frame having parallel portions to support a stripper-plate,vertical and oppositely-located guideways on the exterior of the frame at its front and back substantially midway between its ends, a U-shaped carrier for the patternplate, outwardly-extended hubs on the upright portions of the carrier, to embrace and slide vertically upon the guideways, and actuating means forthe carrier.

3. In apparatus of the class described, a carrier comprising a transverse, centrally-apertured base having upturned arms laterally extended in parallelism at their upper ends, to support a pattern-plate, actuating means for the carrier, including a link, a pivot-pin on the carrier-base midway between its arms and extended across the aperture in the base, and an adjustable connection between the link and pivot-pin, said connection being located in the aperture of the base equidistant from its sides.

4:. In apparatus of the class described a vertically-movable pattern-plate carrier, actuating means therefor including an operatingshaft, an adjustable friction-clamp thereon having a stop-shoulder, and a fixed stop to cooperate therewith and regulate the drawing stroke of the carrier.

5. In apparatus of the class described, a vertically-movable pattern-plate carrier, actuat ing means therefor including an operatingshaft, a split collar thereon having a stopshoulder, a fixed stop to cooperate therewith and regulate the drawing stroke of the carrier, and means to clamp the collar in adjusted position on the shaft.

6. In a molding-machine, an open-ended frame having oppositelylocated, external guideways mounted on the parallel front and back portions thereof, a U-shaped carrier for the pattern-plate, said carrier comprising a base and upright portions, hubs on its upright portions to embrace and slide vertically upon the guideways, and actuating means for the carrier connected with the base thereof midway between the upright portions, the latter rising from and being connected with the base at their lower ends only.

7. In a molding-machine, a frame having upright front and back portions connected by a base and adapted to support a stripperplate at the top, stool-plate supports on the base, an open-ended pattern-plate carrier vertically movable within the frame, and actuating means for the carrier, supported by the frame and located wholly below the stoolplate supports.

8. In a molding-machine, a frame, vertical, oppositely-located guideways thereon, and a 1 names to this specification in the presence of two subscribing witnesses.

CHARLES M. DAY. JOHN ANDERSON.

U-shaped carrier for the pattern-plate, the

npright portions of said carrier having T- shaped extensions to sustain the patternplate, and sand ducts 0r passages in the said 5 upright portions, to deflect sand inward away Witnesses:

from the guideways.

In testimony whereof we have signed our 1 GEORGE OTIS DRALPER, ARTHUR W. BEARDSELL.

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