US828214A - Machine for making sand molds. - Google Patents

Description

PATEN'IED AUG. 7, 1906.

- H. KAROW.

MAGHINMOR MAKING SAND Moms.

APPLICATION FILED 00T. 27.1905.

4 SHEETS-SHEET 1.

I r- II Innen/orf PATBNTED ANG. '1, 190e,

No. 823,214. l

H. KARmN.E 1 MACHINE FON MAKING SAND MoLns.

APPLIUATION FILED 00T.-27, 1905.

4 SHEETS-SHEET 2.

H. KAROW.

MACHINE POR MAKING. SAND MLDS.

4 SHEETS-SHEET 3.

l?? Ven/n No. 828,214. PATBNTED AUG. '7, 1906.

H. KAROW.

MACHINE FOR MAKING SAND MOLDS.. vAPPLnJAtvIoN )FILED Qc'1'.27.19o5.

4 SHEETS-SHEET 4.

UNrrED sTArns PATENT' oFFron'.

HENRY Kanow, oF CHICAGO, iLLiNoisAssieNoR, BYDIRECT AND MnsNE ASSISINMENTS,y IO HENRY I-IRID'lVIORE,- OF CHICAGO, ILLINOIS.

MAQHIN' Fon MAKiNG SAND MoLDs.

N0. Beagle..

Specification of. Letters Patent.

Patented Aug. 7,1306.

' ctaiiiaiqggfagpiimim saam. 160,332, nea June 5,1903. This @puatron tied ocabrzv, 1905. serai No. 234,747.

To all' whom jltmfay concern:

Bedtknown that I, HENRY KARow, a citi- Zeniof the United States, residing at Chicago, in thecounty of Cook and State of Illinois, havek invented certain vnew and useful Improvenientsin Machines for Making Sand Molds,fof which ,the following is a speciiication.`

This invention, which was fully described and made the subject of claimsin an application filed byme on the 6th dayof June, 1903, SerialtNo. 160,332, but. never issued, has for its object toy so construct -a molding-machine .thatjthevr cope or dragtof a flask after being filled and rammed with sand is removed from the filling-stand with pattern, patternplate,l and accessory mechanism in situ, reversed infposition, and deposited upon what maybe termedv a parting-stand, whereupon 4the atterri-plate and pattern are withdrawnfiom the sand inexact perpendicularity to the parting-face; and it consists in the-variouscombinations and details of con struction-hereinafter described and'claimed.

rrary coverv (bottom board with a drag) closed.

In the drawings, `Figure l isa side elevation partly brokenzaway, of va machine embodying -my invention intended primarily for-#packing t'wopart;flasks, showing in full, 1linesthe cope or .3o

drag, whichever it may be, (inthe present instance the cope,) the partingfboard, pattern,- and pattern-,plate and other accessories in l.position for filling and already-filled and rammed, and the tempo?` downl upon 'the top of said-.cope and the struck-.oft1 surface of the sand therein, ready position on. the* Correspondingly-numberedline in the l Fig. 4 is an! enlarged detail v in'perspective of the pattern-plate carriage o rf' i E-al. ,side elevation,

and ramming'a one-part flask, showing the` full lines upon the folfor reversing the positionf and showing also indotted lines the partsin their reversed upon the parting-stan. the pattern to be withdrawn'.l Fig. 2 is an elevationof the ymachine from the fillingstand endywith the `cope and its cover in position thereon. Figj is ahorizontal section foregoing iigure.l

partingcarriage ;l Fig.- f partlyfin section, of the machine for iilling latter to the right in low-board land fillingV and ramming stand, withy the mold formed and temporary cover in" place, and tothe left in dottedflines, in reversedpositiony upon the partingfstand. Fig.

d', 'ready forA 6 is an elevation from the i'illing-stand endo'f the` machine shown in the preceding figure Fig. 7 is a' topV plan view thereof, partly in section, on the correspondingly-,numbered line in Fig. 5, with the flask upon the followboard and empty and both upon the fillingstand; Fig. 8, an elevation of an alternative form of the parting-stand used in the machine last illustrated, adapting it for use with hydraulic power; and Fig. 9, a vertical contral section through said latterl stand.

Referring to said drawings, and ,particularly to theyr rst four figures and applying general references of position and relation of' lines, A indicates a strong frame having four uprights a, the two to the right being shorter thanthe two' to the left. This frame constitutes the filling and ramming stand, while the parting-stand is afforded by two brackl ets A, bolted to the left-hand uprights. at a low elevation. Hinged to said latter uprights by horizontal pivot-rod a is the part-7,.

-the parting-'carriage B moves, and 'also a central yoke-formed hanger or guideB2 for plates B3 of practically the outline vshown in Fig. 3,which by means of slots and clampiitg-- bolts b3 and the set-screws b4, working inilugs set up and fixed to compensate for` wear or to1 insure perfect alinement and smooth run- ,ning To the top of the parting-carriage'is secured the` pattern-plate C by meansof screws c, ventering the plates c', preferably intergal with the carriage, as shown, and to the top of the parting-frame is fixed a ring C', (shown as integral therewith,) to which is secured by screws c2 the parting- .board C2, having perforations of the contour of and'alined with the pattern c3, secured to the pattern-plate. Upon the. parting-board rests the cope C3, positioned relatively thereto by means of eyes c4, pins c", rising from lateral ears thereon. The parting-,carriage ris normally 'locked at its full elevation ,with the pattern projecting through the parting-board and into the cope by means 'of a latch or lifting-lever D, piv- 'ote'd to Fthe plunger mediately of its length i and fulcrumcd at d on the lowerend of a4 link parts to the mechanism indicated in fully ing-frame B, having vertical ways b, in which p the play of the plungerl b of said carriage," The carriage-slides b2 are truncate infcross-` section and the ways therefor are formed of b5 upon the parting-frame, may be accurately rigid and ICO taking over dowel- D', depending from vthe before-mentioned pivot-rod ct, upon which the parting-frame swings. The latch d of this lifting-lever engages an adjustable catch D2, (shown as the head of a screw-bolt d2 l which takes into a step d3 from the yoke-hanger and is-secured in adjusted position b y means of a jam-nut or other suitable means. Then the lever D is unlatched, it .is evidentthat the partingcarriage may be allowed to fall from the position shown in full lines or be lifted up from the position shown in dotted lines, in either case being guided perpendicularly to the parting board or face of the mold by the vertical ways, the fulcrumdink swinging to compensate for the resultant movement of the latch-lever- A collar D3, secured to the stem of the plunger by set-screw dt, determines by contact with the union of the yoke-hanger the distance to which the carrier can fall oi the position ofthe parting-frame. Mounted uponthe pivot-rod a is an internally-screwthreaded thimble E, bifurcated at the end', where it embraces the corresponding end of the fu'lcrum-l-ink and spaced medianly vby distance-sleeves e between the two uprights supporting said rod. Into the screw-threaded bore of this tnimble is let and held' thereto by the jam-nut e the threaded endv of a clampingelever E', bridging the inverted cope and thev cover E2, place-d thereon after the sand has been rammed down and struck off andi terminating Iin a handle e2, adiacent to and parallel with the handheld of the latchlever, so that the two may be held in one grasp and the 'cover and' cope held irmly against the parting-board and partire-frame as the whole movable structure is swig over from the position shown in hill lines 'tethat shown in dotted lines, where it res-ts haci; zontallyupon' the parting-stand. The con tact of the clamping-lever with the cover may be made by means of the set-screw E, secu-red by the jam-nut e3 and taking against al centralv seat on said cover.

The parting-frame and its accessories are supported upon the filling-stand by means of the pivotal connection with the left-hand uprights and by resting upon the top of the shorter or'riglit-liand uprights of said stand.

As will be gathered from the foregoing, the cope or the drag, as the case may be, is filled andv rammed on the filliiigetand, the sand is struck ofi at the top, the cover (or bottom board) placed thereover, and the clampinglever engaged with said cover. Then both levers are taken' in one grasp, and the whole movable structure is swung over until the cover rests upon the parting-stand, as represented in dotted lines in Fig. l, supporting the cope and mold and parting-frame with its accessories. New the lifting-lever is unlatched-and raised, carrying with it the partingcarriage and drawing .-ie pattern perlifting-lever the parting-frame and partingboard are lifted from the finished mold and swung back upon the filling-stand ready to receive an empty cope or drag, while the filled flask-section is removed, thus making the process of manufacture continuous.

Coming next to the structure represented in Figs. 5 to 7, the general principle and mode of operation-to wit, the iilling of the mold upon a ramming-stand and then its being swung from'the said stand and reversed upon a parting-stand, the parts being so bound to gether as to prevent all possibility of jar yo1' disturbance of the mold during the reversing tc which it may be lifted without affecting swing, 'and finallythe Withdrawal of the Pat* tern along a line normali to the partingface'w are the same as in the foregoing construction.; but the specific vmechanism` employed differs in some respects, as wi-ll now be described. A2 re resents the f"lling and rammin'g stand, (s iown tf; the rignt in Fig. 5,)'resembling the stand A first described', except that its four uprights a2 are of equal or about equa-'l length. Brackets A3 from .stand serve herein as the parting-stand, as will presently be -explained', and beneath these is another bracket B4, supporting at its end' a guide-socket for the play of the plunger b5 carrying the parting carriage or table B5, which is raised and lowered by a lifting-lever DX, pivotedV thereto and' ful'crum'ed on a com ens'ating link dx,

' ivoted to the above brac et. This lifting ever has a hand-controlledidog F, which engages a stop f to' hold the lever and parting- IOC carriage in elevated osition, as indicated in full lines at the leftand end of Fig. 5, and this sto is formed upon the u per edge of a plate BP', adjustable vertically along the socket by set-screwj" and slot and clampingscrew f 2, so that the elevation of the partingcarriage maybe closely determined'. As no parting-board is employed in this construc-4 tion, the purpose being vto form one-part molds, the follower-board or pattern-plate G is hinged directly tothe pivot-rod a', connecting the left-hand uprights by means of intervening knee-pieces G', the lower arms g of which are connected by springs g with lugs g2 upon the right-hand uprightsA .It has also a lever-handle G2 to serve in the capacity of lifting and rockinfrlever. The pattern is laid upon or secured` to this follower-board, the {iask H is set thereon and positioned bv means of the dowel-pinsh and eyes hand the sand filled in and rammed as before. Then, after striking off the bottom board E2 is placed upon the flask andthe clamping-lever E engaged with it, and the flask, mold, and follower-board', rmly united', are thrown over IIO socket. (See Figs. 8 and 9.) .Thesocketl .springs until' t-hey reach the vertical, after which ythey are. lowered to the parting-platform against the resistance of these springs, insuring'stea-dmess of motion. Means are provided for altering the tension of the springs,

as shown. At the outer ends of the brackets composing the Aparting-stand are adjustable stops jI, -witli which ears i from the followboard come iii Contact at the moment the latter reaches the exact horizontal. It will then be support-ed upon said stops and by pivotrod aliii suchposition. The parting-carriage will be adjusted to such height that it will simultaneously receive and support the bottom board, flask, and mold therein, so that vthe pattern will not be jarred in or started fronithe. mold. Now by undogging the lifting-lever and slowly depressing it the parting-carriage is lowered, withdrawing the mold and flask from the patterns and leaving the follow-board and patterns supported'on the'pairtiiig-stand, from which they will be swung over upon the filling-stand to receive a fresh empty flask. Avent is provided, as shown at the bottom of theyguide-socket, to allow the-air to escape in front of the plunger b5, andthe resista-nce of this air-cushion contributes toward preycnting af j ,erky movement during the withdrawing of the mold. f In this downwardmovement the parting-carriage.

carries with it the bottom board and clamping-lever, which latter must therefore be separable from its t-hinible E, to which. it is otherwise secured in the same manner as the iirstrecited example. The simplest way known to me to accomplish this uncoupling effectively and speedily isby parting the lever adjacent'to the jain-iiut and uniting the two sections by a bayonet-joint sleeve L, oper' ated by a handle l, and requiring but a simple twist to two parts. justing-screw through the clamping-lever is not so necessary and has been replaced by a downward bulge l in the lever.

Instead of employing a lifting-lever to operate the parting-carriage in the construction last described the plunger may be turned down between shoulders m to receive a sto pin m', adjustable upv and down alon t e socket by slot and clamping-.screw 'ml to imit the rise and fall of the carriage, and the lower end of said plunger maybe formed as apiston ,l

and .positioned over -said support, a cover for m3`with suitable packing to tit closely in the may carriage or drawn ofi therefrom at any'de` sired rateftlirough utletv n in order vto let said carriage down easily andregularly for uncouple or couple together the'A In this construction also thev ad.

be connected byv a pipe N with a sourcev forfsup lying hydraulic or pneumatic force, v turning the cock n is one direction.

the purpose of withdrawing the pattern and follow-board.

As already lstated, the two forms of con struction described are substantially identical in principle and mod-e of operation. The object in each forni is to provide mechanical means for expeditiously and safely separating a machine-made sand mold from its patterny without injuring the mold. In the rapid man- `ufacture of sand molds by machinery the processes hitherto used -result in numerous injuries to the mold either by jarring the the lmold from? i sand in turning the y'mold or -in attemptingv to Y.

start the pattern or by rapping the pattern or again by failing to withdraw it steadily -and while keeping the pattern arallel to .the

plane of parting. To diminis these losses,

sorted toor a fine closely-packing sand'has` been used,wliich will give the more delicate hard ramming down of the sand has been reparts of the mold strength sufficient to pre vent their 'being marred; but both these methods result in making mold-Walls so hard and impervious to gases that lthe natural venting is insuflicient, again causing de- -fective castings. The present device aifordsl u means for inverting the mold after raniniing without any danger of the sand being .jar-red, for vplacing the inverted moldin a secure position for withdrawing, the separatingparts thereofbeing rigidly held in their respective moving appliances, and, finally, for rectilinearly separat-ing the pattern from the mold by controllable pull operating uniformly at all points of the separating-surfaces. An

IOO

especially meritorious feature is that the device requires very immaterial additions to be made to machines now in use to fitthem for this method of stripping and combines all the parts'necessary for 'rapidly' turning out the completed molds in a ractically continuous o eration performedt oughout on onenmac ine.

1 do not limit struction herein set forth, considering that myinvention is not limited thereto in its nature; but

myself' to the specific con- What I claim, and desire to secure by Letf,

ters Iatent, is.- h A y j 1. The combination, in amachine for mak.- ing sand molds, of a machine-frame embrac- 1 ing a filling and ramming stand and a parting- IISy stand, a pattern-support having a horizontaly hinged connection between the two stands, a flas or flask-section adapted' to be placed `said section, means for holding the cover and section against` thejsu ort and for swinging f the support from the iii'gstand to the vpartt `ing-stand', reversing the-position ofthe parts, p

-port is in t elatter reversed position, a

lunger supportingsaid carriage, a locking-lever ISO vpivoted to the plunger, and a compensating on one end of Wljili the lever is hilcrltinid while the other end is pivoted to .thei"rame,` .y

whereby Vsaid carriage may be moved by the Y lever in aline perpendicular to the parting-face p of the mold y 2, The combination, in a machine forrnalcv ing sand molds, of a machine-frame einbracing a filling and rammling stand and a partingstand, a pattern-support having a horizontal hinsed connection between the -two stands, .a fia or laskeection adapted to :be placed and positioned over said support, a .cover -for said section, means for holding the .cover and .section against the supporta-nd for swinging vthe support from the filling-stand to the parting-stand, reversing the position of parts, a carriage for withdrawing one of the parting elements from the yother in a line perpendicular to the .parting-face while the pattern-suppont is in the latter reversed position, a plunger supporting said carriage, .a locking-lever pivoted to the plunger, :a compensating link to` one end of which the lever is fulcizumed while the other end is pivoted to the trame, whereby said caariage may be moved by the lever in Aa line perpendicular to the pantingface ofthe mold, and an adjustable stop with which said lever latches to hold the carriage at a variable elevation.

3. The combination, in a machine lfor maktor a compensating link and pivotally con-l nected With the pattern-support,-having a handhold normally parallel with and in roximity -to the handhold of the clamping- 4ever, whereby the finished mold maybe clamped against the pattern-support and the two swung bodily with the levers over from the iilling to the parting stand, and the pattern-support and pattern thereon the-n separated from the mold, by means ofthe locking-leverI in a line erpendicu-lar -to the parting-face of said .mo d.

4. The combination, in a machine for making sand molds, of a machine-frame embracing a filling and ramming stand and a parting- 'stand, a parting-frame having a horizontal hinged connection between the two stands, a pattern-support movabie vertically in said parting-trame, a flask flask-section adapted to be placed and posiiioned'oversaid supzfport, -a cover for said section, a clamping-leverhaving a common vpivoted axis with the parting-frame, serving te 'e1-amp the et (or bottom board) upon the iiask-secti-on, and provided with a horizontally-proj ecting handold, a locking-lever fulcrumed to a compensating link and pivotally connected with y the pattern-support, having a handheld-normally parallel with and in. proximity to the handhold of th'e clamping-lever, whereby the filled lasksection may be clamped against the pattern support and the two swung bodily over from the lling-stand to the parting-stand, and means whereby the pattern support and pattern thereon being irst separated from the mold by the locking-lever, the parting-frame is next engaged in the continued movement of said lever and thrown over with said pattern-support upon the illing-stand.

5. The combination, in a machine for making sand molds, of a machine-frame embracing a lling and ramming stand and a parting-stand, a parting-frame having a horizontal hinged connection between the vtwo sta-nds, a pattern-support movable vertically in said parting-frame, a fiask or iiask-section adapted to be placed and positioned over saidsupport, a cover for said section, .a locking-'lever fulcrumed to a compensating link and pivotally connected with the patternsupport, and a catch for said locking-lever upon the parting-frame, whereby the locking-lever holds up the pattern-support upon the filling-stand and serves to separate it y from the mold upon the parting-stand.

6.. The combination. in a machine for making sand molds, of a machine-frame embracing a vfilling and ramming stand anda parting-stand, a parting-frame having a horizontal hinge-d connection between the.` two stands, a pattern-support movable vertically in said parting-frame, a flask or flask-section adapted to be placed and positioned over said support, a cover for said section,` a locking-lever fulcrumed to a compensating link and pivotally connected with the patternsupport, a catch for said locking-lever upon the parting-frame, whereby the locking-lever holds up the pattern-support upon the 'filling-stand and serves to separate it from the mold upon the parting-stand, and astop upon the plunger of the pattern-support whereby, the pattern-support and pattern thereon. being first separated from the mold by the locking-lever, the parting-frame is next engaged by the stop in the continued movement of said lever and carried up there-- by, away from the mold and over toward and to the lling-stan d.

7. The combinationgin a machine for making sand-molds, of a machine-frame einbracing a filling and ramming stand and a parting-stand, 'a parting-frame having a horizontal hinged connection between the two stands, a pattern-support movable vertically IOO in said parting-frame, a flask or flask-section- -adapted to be placed and positioned over said support, a cover for said section, a lock'- ing-lever fulcrumed. to a compensating link and pivotally comiected with the patterne.

v support, an adjustable catch on the partingframe ,for said locking-lever, and means l whereby the filled ilasksection may be clamped against the pattern-support andthe two swung bodily over from the filling to the parting stand and thepattermsupiport and pattern Y thereon then separated tern-sup ort having a plunger playing in saidguide-yo re, and slides parallel therewithengaging vertical ways in said parting-frame, a

'ing a common pivota lframe, serving to clamp the cover (or bottom flask or flask-section? adapted to e placed and lpositioned over qad attern-support, a cover for said sectionv "a c amping-lever havlamfs with the partingboard) upon the liask-section, and provided with a horizontally-projecting handheld, a

locking-lever fulcrumed to a compensating link and pivotally connected with the v1unger, and: ani-adjustable catch for the everlatch, u on the guide-yoke, said lever having a hand old normally parallel' with and in proximity to the handhold of the clampinglever, whereby the filled flask-section may be clamped against'the pattern-support and the two swung bodily from the filling to the parting stand, andthe pattern-support and pattern thereon then separated from the mold by means'of the locking-lever.

9. The combination, in a machine for, making sand molds, of alnachine-frame embracing a filling and ramrning stand and a parte ing-stand, a partingvframehaving a horizonta stands and formed with a guide-yoke, a pat'- tern-support having a plunger playing in said guide-yoke, and slides parallel therewith engaging vertical ways in said parting-frame, a

om the' to the handholdof the clamping-lever,

hinged connection between the two flask orflask-section adapted to be placed and positioned over said pattern-support, a

.cover` for said section,` a clamping-lever having a common pivotal axis with the partingrame, servingtoclampthe cover (or bottom board) upon* the flask-section, and provided with a horizontally-projecting handhold, a

.locking-lever fulcrurnedfto 'a 'compensating link and pivotally connectedwith the plunger, an adjustable catch upon the guide-yoke for the lever-latch, the handhold of the lever being normally parallel with and in proximreby the iilledflask-section may be clamped against the'pattern-support and the two swung. bodilT over from the filling to the parting stand,- and the pattern-support and pattern .theneon l then separated from the mold by meanalaof thelocking-lever, and 'an adjustable collarfiiftop upon the plunger,

.Wherebythe pattern-support and pattern thereon being first separated from the mold -by the locking-lever, lthe parting-frame is next engaged by said collar or stop in continued movement of said lever, away from the mold and toward the iilling-stand.

-10.The combination, in a machine for making sand molds, of a machine-frame embracing a illing and ramming standv and a parting-stand, a parting-frame having a horizontal hinged connection between the two stands and formed witha guide-yoke, a patternsuporthaving a plunger playing in said guide-yo e, and slides parallel therewith. en gaging vertical'ways said parting-frame," adjustable Wear-plates facing said ways, aA flask or flask-section adapted to be p aced and positioned over said pattern-support, a cover for said section,l a locking-.lever .ful-

crurned to a compensating and pivotally connected to vthe pattern-support, and a catch upon the parting-frame yfor saidlocking-lever, whereby the 'locking-leverholds the pattern-support in place in the' partingstand, and serves to move it in the guideyoke andV ways thereof.

" HENRY KARCW.

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