US1096668A - Molding-flask. - Google Patents

Description

P. J. BECKER. MOLDING FLASK. APPLICATION IILED'JUNE 7 1913.

Patented May 12, 19 14.

3 SHBETS-SHEET 1.

F. J. BECKER. MOLDING 'FLASK. APPLICATION FILED JUNE 7, 191a.

Patented May 12, 1914.

3 BHEETSSHEET 2.

v 1 MW7 P. J. BECKER.

MOLDING PLASK. APPLICATION FILED JUNE 7, 1913.

Patented May 12, 1914,

3 SHEETS-SHEET 3.-

FRANK J. BECKER, 0F HAMILTON, OHIO.

MOLDlING-FLASK.

Specification of Letters Patent.

Application filed June 7. 1913.

.laicnicd May 1.2, 9 l 41-.

Serial No. 772.246.

To all 212 mmz't may concern:

lie it known that I. FRANK J. lineman, a

citizen of the United States, residing at Hamilton, in the county of Butler and State of Ohio, have invented certain new and useful Improvements in lVlolding-Flasks, of which the following is a specification.

My invention relates to a molding flask.

One of the objects of the invention is to provide means forming a component of the flask for correctly drawing patterns.

Another object of the invention is to provide a flask having self-contained patterndrawing mechanism, whereby molds can be quickly, accurately and invariably formed by ordinary laborers, the principle of the invention being such that neither the services of an expert hand-molder, nor the experience of a skilled machine-moider, are re l l l quired, the resultant products being superior j v to either machine or hand-made molds.

Another object of the invention is to produce a molders flask having pattern drawing H1Cllfl11l$11l on its sides, wherein the parting plane is prcdetcrmincdly defined solely with respect to the flask structure, the flask members being separated invariably and precisely on this initially established parting plane and in the true direction of the draft, that is, normally by motion directly at right lines to the parting plane, so that after the pattern is correctly molded in the sand, it may be so released that the molding surfaces defining both the pattern cavities and the parting plane, will be rendered intact when disassociatcd from the forming elements.

Another object of my invention is to provide a flask with pattern drawing means enablirng a given flask to be used for either bench or floor work.

Another object of the invention is to so mountor organ ze the pattern drawing means on the sides of the flask, preferably the pattern carrier, that it will operate in relation to conventional top and bottom mold frames, having hinge and latch provisions or its equivalent for opening up mold frames to release the mold cake.

Andther object of the invention is to provide nu-ans l'or correctly separating thc meeting surfaces of the mold sect-ions. as well asfreeing the surfaces defining the pattern cavities from the pattern.

, twrcn contacting nwlai The pattern drawirr conditions are different and simpler where a conventional pattern or parting: plate is employed, for there the mold sections are entirely sepal'tlltttljfl'fllll one another by the intermediate plate, and there is a clean separation beand sand surfaces, but where the pattern spans a hollow frame there is a contact of sand on sand surrmmdin; the pattern. and the common parting; plane oi. the contactingsand parl clcs must.

coincide with the original 'lorming joint plane.

A flask embodying the principles of my invention is particularly desirable for job foundry; uses. the llask ilscll' crnstiluting a complete pathrn-drawing mechanism. so that for hurry orders no machine equipment need be first prepared, the organized llask being: adapted intrinsically for all exigcutw requirement.

l have shown the 'u'cl'erred embodiment ol the invention in the accom 'ianyi11g drawin forn'iiun a part of this specification, in view of 'which disclosure lhe underlying principle of the invention will be understood by those skilled in the art, irrespective of the concrclc structure and arrangement lcclcd for illustrative purposes, wherein:--

Figure l is a side elevation of my inveir tion. showing the flask sections and pattern frame in a normal position for filling the cope and drag scctions of the flask with sand. Fig. 2 is a view similar to Fig. 1 showin the parts in their separated position, after the mold has been finished. Fig. 3 is an end elevation in normal position of the parts. Fig. 4 is a top plan view of the pattern sect-ion illustrating" also the mold section beneath. Fig. 5 is a. section through one end of the pattern carrier showing the rock shaft. Fig. 6 is a sectional view showing how the first or bottom mold section is conventionally formed. Fig. 7 is a section through the three flask members showing the mold completed and the flask members separated.

I will first describe the llask components and operations for impressing the pattern in the mold, in order that the pattern-drawing rconircmcnl' and the principle of my invcntiim may be clearly understood.

The flask comprises the hollow, mating mold frames l. 3, and the pattern carrier 2,

which are assembled one upon the other in the order of the reference numerals, the pattern bridging the hollow frame of carrier 2, so that it is ultimately solidly embedded in the sand of the three part shell constituting the flask. I refer to these members as mating because the sand cakes or mold sections to be separately formed in frames 1 and 8 are formed with mating or contacting'faces constituting the parting plane, and with registering pattern cavities constituting the mold. Therefore, when the flask members are assembled with the pattern embedded in the sand, the forming elements must be so released that the cakes in separating from one another and freeing themselves from the pattern, will part on exactly the plane constituting the joint of the cakes as formed, so that when the finished cakes are joined to form the mold, they will correspond exactly to the position and condition of the sand as the pattern was originally embedded therein.

Fig. 6 shows the conventional first step in which 5 is a base, that portion of the pattern 4,- of the carrier 9. of which an impression is to be made in the mold material of the upperframe 3 being embedded in the filling material of the base 5.

The material is first compacted into mold frame 1 and pattern carrier 2, when posi tioned on base as shown in in". 6. The pattern carrier and fr: me 1, lifted from the base, in erted, and frame 3 is placed on the pattern carrier. The material is then compacted into frame 3, around the pattern. The plane of contacting sand surfaces constitutes the parting); plane for the pattern drawing. The pattern thus solidlyembedded in the sand of the assembled flask. exceptior the sprue formed through one of the cal-(es for mining the metal.

l ly invention is more particularly directed to that type of the pattern carrier comprising a hollow frame spanned by the pattern unere sand surfaces contact, defining a forming joint in the first instance and a parting olanc in the operation of drawing the pattern. j

l: have detailed this conventional method of embedding the pattern into the two mold sections compressed together, because the means I have invented for drawing; the pat-. tern, operate with reference to the forming principle so far described. The sand cakes,

or, mold sections thus separately formed about the pattern, are to be so separated from one another and from the pattern as to preserve intact the surfaces defining the sectional pattern cavities as well the contacting surfaces of the sand cakes defining the joint for both forming and parting the mold sections. These criticalsurfaces must not be disturbed in the act of separation or the mold will be injured or destroyed. The

two cakes must part at the joint, and 'the ooaeee This-is particularly ditli ing surfaces oi the mold sections to be registered after their release from the forming elements.

The problem of correctly drawing the pattern has been a serious one in foundry practice, the skill. of the most expert hand molders being indcpendable and variable at best, so that many attempts have been made to produce the desired results by attaching devices to the flask members, as as well as by attempts to incorporate the said members as elements of an organized and expensive machine.

The parting joint extends cross sectionally relative to the pattern carrier 2, and the set, surfaces so carefully formed and 50 perishable. must be preserved to make a per fect mold. To efiect this result, I provide actuating means attached directly to one of the three flask membersand coacting in relation to all three members'when the pat tern is being released from the sectional pattern cavities, and the joint surfaces of the cakes are being separated from one anpther. The principle of my three part separating coaction is such that the strains become critically eilective at the theoretical parting plane and exerted in true right lines relative to this plane.

It is a principle of my invention that the strains of the separating mechanism are uniformly exerted in the direction trans verse to the parting plane, the movements of the flask members responsive to the strains being preferably mechanically guided in true right lines relative to the parting plane, wl1erefore, the mold sections; will of. necessity separate at the forming joint and the pattern will relatively move from the sectional mold cavities in the true line of draft. In other words, the separating influences will-be a reproduction of the pattern cavityfor'friing influences exerted in exactly an opposite direction Preferably,

I provide four jack members 6 specifically in the nature of cams, which function as separating instrumentalities for pattern drawing. on the outer sides of the pattern carrier 2, one at each of the four ends of the rectangular frame, two on a side, the rock shafts 11 are preferably fixed to the middle portions of the jack 6, the extending-ends having anti-friction rollers 'Z, 8, respectivelycon;

tacting the top and bottom rim surfaces 9, 10, of members 3 and 1, between which the elements 6 are positioned, these rims ex- Said members 6 are fulcrumedtending flange-like from the vertical walls of said tlask frames Preferably rock shait'ts ll constitute the tulcrums rotatable on the pattern carrier 2, the members 6 being fixed to turn therewith. From each rock shaft projected a rock arm 12. On one side of .frameQ. at the medial line thereof, I, place a f'ulcrlnn post 13. to \VlI Cil is pivoted a lever '14: the inner end of which ro'ects bea P J :vond the fulcrum point. For connecting: the rock arms 12 with the actuating lever arm 14, I provide two links in, pivotally connected at their inner ends to said lever arm upon opposite sides of its "fulcrum, the outer ends of said links being pirotal'ly connected to the rock arms 12, at the corners of the frame. NVhen the flask members 1, :2, 3,

are assembled for forming the upper mold section, as shown in Fig. l, the lever it is 111 its lower position, the elements 6 extending in substantially horizontal plane, the

three rim surfaces of the flask me tubers mutually contacting. When lever 14- is slowly raised, the members (3 will start turning to their vertical position, shown in F ig. 2, sepa rating" the members 1, 2, 3, from one anm her, parting the meeting surfaces of the meld sections at the forming joint, and si-" multaneously releasing the pattern from the upper and lowe secticnal mold cavity surfaces.

L The movements of the flask members are directed by guides 16, 17,' in true right lines taken from the parting plane, regardless Whether or not the flask sets level.

The separating impulse is exerted at the parting plane, the relative movements starting at the same time, but a. .t'ull throw of lever 14: will bring the members 1, 2, 3, a predetermined distance apart, sufficient not only to part the mold joint release the pattern from the upper and lower sectional pattern molds, the finished cakes can then be taken out of the frames 1 and 3, by unlatching, the tastenings l8, and the mold sections united.

The parallelism of the rim surfaces .l, 10, with the forming joint or parting plane. and the right angle guide members fill, it, cause the leverage stresses to be exerted in the line of draft, regardless of the position of the flask, and the members to rela tively move in this theoretical line of draft, theleverage of the separating mechanism being controlled solely by the structiiral correlation of the three flask members with which it has mutual coaction.

With a flask of this character, a green hand can make molds quicker and better than a skilled hand-moldr.

The pattern drawing is also more correct than in that class of molding machines but to completely employed.

Elie

of the flash. to impart to each ot' the three llaslt members said relative movements, from a position ol? rclatirc contact, which constitutes the essential n'inciplcs of my invention. I

The plane whcrcin the sand particles oi the upper mold contact the sand particles of the" lower mold, constitute the 'lforming joint of sand on sand in the first instance and the desired parting plane in the second operation, and these surfaces must be separated; while the sand particles forming the surface of the mold cavities contacting the pattern. constitute contacting: sur'lt'act-s, of sand on metal, and these ditl'erent characters of contact surfaces must be also correctly separated in the pattern drawing operation.

In view of this disclosure it evident that the principles of my invention are susceptible of embodiment in a variety offorms (littering specifically from -what is shown in the drawings.

Preferably I provide steps 20, 21, on the sides of the flask definitely positioningthe three-part [lash members relative to one another for the forming" operation The specific preferred arrangement of separating mechanism is shown in Figs. 2 and a, from which it will be seen that the .llftill'lgl: lever, or actuator 1-1, is placed on the front side of the flash, th reel: shafts 11 Spit-lilting the pattern call-trier outside of the frame. the cams (i, on the rear of the frame being tired thereto, so that a single actuating lever on the front of the {lush may be.

The cams I). are connected in pairs at each cnd ol the Frame. ell'ectivc at the tour cortuna-a whereby the lifting: agency is energizsctl by connlouzul twirl-ages.

It will be undcrsnunl by those skilled in the art that 138 the hing of mold l'rame l. :lor opening}; up the Lit! to role: ..c the lie .ished mold section. a d. that frame 3 has a similar hinge diagonal l disposed as to latch 18, while the mold frame 1 has a similar latch l8 diagonally disposed in reference to the corner hinge 2t)..-

It highly znlvantageous to provide a pattern drawing mechanism directly mounted'on the sides of the tlaslc which can be, used in connection with this type of opening: up mold frames, and not requiring some special structural mold frame not: readily ad aptable for general foundry work.

The cams or levers ll are lifting jacks coacting with flash abutments to rclatiwly scparate the three flask members. 'lhc are dis posed around the sides of the llasl; so as to exert unilorm separating strains in ri ht lines to the parting plane. They not only cl ill) feet the separation but form a support for 'the flask members in their separatedp osi- The mold frames with the hinged sides or I other separable provision for releasing the mold cakes are conventionally known to the trade as snap flasks, or snap mold frames.

The lever mechanism in moving to final position causes a dead center so as to supv port the superposed parts as shown in Fig. 2. The upper frame can then be removed, the pattern carrier taken ofl' of the lower mold frame andplaced on the member 5, as sh ruin Fig.6, ready for forming the next mdlh section, the upper and lower mold frames are brought together, and the two mold frames are then unlatched, and so the mold is formed. The lower frame 1, is placed on the frame 2, as shown in Fig. 6,

and the operator is ready to start on a new mold.

The frame member itself carries the separating mechanism constitutes an article of manufacture for use in connection with half flasks, that is to say, the upper and lower mold frames commonly known as the cope and drag which together form a flask. Said member is adapted to be detachably supported by the flask in such position that the separating mechanism can cotiperate withsaid flask members for separating them on the'parting plane. A preferred embodiment of the invention is thus in the nature of a molders appliance for use in connection With two-part flasks, the particular method of handling the pattern being left somewhat to the discretion of the foundryman.

Having described my invention, I claim 1. A pattern drawing devicecomprising mold frames and an intermediate pattern carrier, constituting separable flask members, and separating means supported on the pattern carrier and coacting with all three members to relatively separate them each from the other: in right lines to the parting plane.

2. A. molders flask comprising snap mold frames, and an intermediate pattern carrier, said snap frames having rim surfaces constituting abutmta'gis in parallelism with one another and with the plane of the forming joint of the mold sections, means guiilil'zg said members in right lines relative to said surfaces, and lever mechanism supported on one of said members and operating bet-ween Loeaeee said abutment surfaces, whereby all three members may be relatively moved to separate the mold sections on the predetermined parting plane, and to release the pattern from the mold cavity surfaces.

3. A molders flask comprising snap mold A frames and an intermediate pattern carrier,

lever mechanism supported by-and coacting with. the flask members for simultaneously anduniformly eflecting a relative movement of said-three members each from the other, andan actuator on one side of the flask for operating said separating mechanism upon opposite sides of the flask.

a. A device adapted to form one of the assembled elements of a molders flask, lifting jacks and operating mechanism supported on the sides of said device, the lifting jacks being adapted to coiiperate in relatic-n to hinged mold frames, constituting separable members of the flask.

5. A three-part separable molders flask,

having abutments, coacting jacks fulcrumed on the sides of the flask, and a jack actuating means fulcrumed on the sides of the flask for operating said jacks in unison, said jacks and actuating means comprising a pattern drawing mechanism self-contained on the flask, the abutments and jacks being relatively disposed to effect a simultaneous three-part flask separation.

6. A molders flask comprising snap mold frames and an intermediate pattern carrier constituting a three-part separable flask, a unitary lever mechanism supported by said flask members and operating simultaneously and uniformly on opposite sides thereof in correlation to all the members to relatively separate them from the parting plane of the mold sections, and means on one side of the flask for operating said separating mechanism upon opposite sides of the 7. A pattern carrier for a .molders flask having lifting jacks disposed around the sides and means on the pattern carrier for simultaneously actuating said jacks.

8. A device of the nature disclosed comprising mold frames and an intermediate pattern carrier constituting a three-part separable flask, pattern drawing means supported on the sides of the pattern carrier adapted to coact with the mold frames to relatively separate the three flask members, means guiding the direction of movement of said members, and an actuating element for simultaneously operating said pattern drawing means.

9. In combination with mold frames and an intermediate pattern carrier, constituting a three-part separable flask, pattern drawing means supported on opposite sides of said pattern carrier and. operating with respect to themold frames. to relatively more the three flask members from contacting polac" sition to pattern releasing position, means parting plane, and means for simultz'meously operating said pattern drawing means.

10. A molders flask coniprising mold frames and. a pattern carrier, cams on oppo site sides of the pattern carrier, having one position in which the flask members respectively contact, and 11.. )ther position in which said three flask frames are relatively separated, guides for said movements, and means 't'or sinmltrmeously actuating said cams.

11. A molders flask comprising mold frames and a pattern carrier, cams on opposite sides oi: the pattern carrier coactlng with bearing surfaces on the two mold frames, said cams being adapted to be turned to relatively separate the flask members and pattern carrier, means guiding said flask} members in right lines to the predetermined parting "plane of the mold sections, and

means for simultaneously actuating said cams to separate said members from the parting mold plane and for releasing the pattern from the mold sections.

152. In a molder s flask mold frames having marginal flanges, and means for intermediatcly supporting a pattern, cams on opposite sides of said incansbetween said marginal flanges, and means for simultaneously actuating said. cams to exert opposing strains on said 'marginal flanges for relatively scparating the. flask members.

13. A molders flask comprising pattern supporting means and two snap mold frames, and mold frame eparating mechanism mounted on the sides of the flask for drawing the pattern, said mechanism being so located as to permit the opening of both the upper and lower mold frames.

let. A molders flask comprising snap mold frames and an intermediate pattern carrier, constituting a three-part separable flask, devices secured on the sides of the pattern carrier for imparting simultaneous relative separating movements to each of said three flask members, and an actuator secured on the sides of the flask for opcrat- 1 ing said separating devices.

15. A molders flask comprising an upper and lower mold frame, and means support ing a pattern, mechanism mounted on the sides of the flask and operative between said mold frames for relatively separating them and drawing the pattern, said mechanism being so located as to permit both mold frames to be opened up after the pattern drawing operation).

16. In combination with mold frames, an intermediate pattern carrier, separating devie secured on the sides of the pattern carrier. and a lever fulcrumed on the sides of said pattern carrier coacting with said separating devices for actuating them.

17. A molders flask coinprislng mold frames, and means intcrmediatcly supporting a pattern, lever mcchanisn'i on the sides of the flask movable to relatively separate the mold frames and pattern supporting means, said lever mechanism crossing a dead center at the end of its separating movement and forming a fixed support for the upper mold frame members.

1.8. A molders flask comprising snap mold frames and an intermediate pattern carrier, constituting a three-partseparable flask, separating devices i ulcrumed on the sides of the flask, and an actuating device fulcrumed on the sides of the flask for operating said separating devices thereby relatively separating said flask members each from the other. I

11). A molders flask comprising hollow frames and means supporting a pattern,

shalts extending across opposite Walls of tern drawing movement.

:21. A pattern drawing device comprising mold frames and an intermediate pattern carrier constituting a three-part separable flask, rock shafts spanning the opposite ends of the pattern carrier outside of the molding material receiving space, cams fixed to the ends of said rock shafts coacting to relatively separate said flask members each from the other, and lever mechanism on one side of the flask for simultaneously actuating said rock shafts.

22. A moldcrs flask comprising mold frames, an intermediate pattern carrier, and means supporlc [l on the sides of the pattern warrior. coacting with the three-part separable members to move them to mold separating and pattern releasing position, said means comprising elements exerting uniform scpa -ating strains at predetermined points relative to the sides of the flask, and an actuator on the side of the pattern carrier having motion transmission connection with said separating means.

23. three-part separable molder s flask having allotments. coat-ting jacks and jack actuating means, said jacks and actuating means comprising a pattern draining mechanism sclt-containcd on the flask. the abutments and jacks being relatively disposed to cll'cct a thrcc-part flask separation and support.

24. thrcc part separable molders flask having abutnicnts. enacting jacks and lover mechanism actuating the jacks, said jacks and actuating means comprising a patterndrawing niecl'ia-nism self-contained on the task, the abutments and jacks being relatively disposed to effect a three-part flask separation and support, the lever mechanism passing a dead center when the jacks support the separated flask members.

$25. A three-part separable molders flask having abutments, double acting jacks therefor exerting opposing strains between the abutments, and jack actuating means, said jacks and actuatin meanscomprising apat tern drawing meo ianism self-contained on the flask, the abutments and jacks being relatively disposed to effect a three-part flask separation.

26. A three-part separable molders flask having abutments, fulerumed lifting jacks and fulcrumed actuator, and connections between the jacks and actuator forming a pattern drawing means self-contained on the flask, the acks and abutments relatively disposed to exert uniform strains around the sides of the flask and simultaneously effect ing a three-part separation of. the flask members.

27. A molders iiask comprising pattern supporting means, and two mold. frames, the members of each of which are formed to -open and close for releasing the finished three members to separate each from the other.

'29.-A member adapted to be assembled into a molders flask comprising snap mold frames, having means cooperating with. the

snap frames to relatively separate them for drawing the pattern.

30. [i bottom mold frame and a pattern arrier seating thereon, means on the pattern carrier for lifting it from the bottom frame, and an actuator on the pattern carrier for operating said lifting means in unison.

31. A molders flask comprising snap mold frames, means supported on the sides of the flask cooperating with the snap frames for relatively separating them, and an actuator supported on the sides of the flask for operating said means in unison.

A molders flask comprising snap mold frames formed with parallel rim sur faces constituting abutments, means supported on the sides of said flask cooperating with said abutments to separate said mold frames from one another, and an actuator on the sides of the flask for operating 6-5 said means in unison.

A molders flask comprising mold frames and patternsupporting means, each of said frames having its members formed to open up a frame for releasing the mold section therefrom, mechanism supported on and operating uniformly around the sides of the flask for relatively separating the frames and relatively separating them from the mold sections.

3.4. A .molders appliance for use in connection with a twopart flask, and comprising a member adapted to be detachably sup ported thereby, and mechanism carried by said member and adapted to cooperate with 80 and separate said flask parts.

In testimony whereof, I have hereunto set my hand.

FRANK J. BECKER.

Witnesses:

W. F. BERGEN, 7M. HUMBAUH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, D. C.

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