US1329459A - Machine for feeding sand to molding-flasks - Google Patents

Description

E. R. DUNSFOR'D. MACHINE'FOR FEEDING SAND T0 MOLDlN-G FLASKS. APPLICATION FILED MAY 27| 1919.

1,329,459. Patente@ Feb.3',1920.

2 SHEETS-SHEET' l- E. R. nuNsFoHn.

- MACHINE FOR FEEDING'SAND T0 MOL'DING FLASKS.

APPLICATION FILED MAY 27.1919.

1,329,459, Patented Feb. 3,1920.

2 SHEETS-SHEET 2.

f. l EMEIs RDUNsEo'nn, or ALLIANCE, oiiro.

MACHINE FOR FEEDING SANII'.)I TOxlVIOLIIING-FLASKS.

Application led May 27, 1919. VSerial No. 300,018.

To all 'whom t may concern;

Be it known that I, EMEIS a citizen of the United States, residing R. DUsFoRD, at

4 Alliance, in the county of vStark and State of Ohio, have invented certain new and useful Improvements in Machines for Feeding Sand to `Molding-Flasks, of which the following is a specification.

This inventiond relates to that type of machines or apparatus which are employed to feed sand to molding iiasks and which supply the sand by centrifugal force at a high speed so that it will be firmly and compactly deposited and built up within the flask.I

The object of the present invention is to simplify the construction and improve the mounting of the machine whereby the cost of assembling and operating will be reduced and the feeding member more effectively balanced than isthe case w-ith prior machines and the sand fed to the mold more rapidly and evenly than heretofore.

The invention is illustrated in the accompanying drawingsl and 'will be hereinafter fully described, the novel features being subsequently pointed out in the appended claims.

In the drawings: Figure lis a view partly in side elevation and partly in vertical section of an apparatus embodying my improvements;

Fig. 2 is a front elevation of that portion of the apparatus whlch acts'directly on the sand; i

Fig. 3 is an enlarged transverse section of the mechanism shown in Fig. 2;

Fig. 4 is an enlarged front elevation of the same with thecoverplate removed and some of the securing bolts shown in section.

In carrying out my invention, I employ a pedestal 1 which is constructed with a suitable base 2 adapted to be securedto a rigid or fixed support and lmay be perma# nently bolted or otherwise anchored to the floor of the molding room. This pedestal is provided on one side with the forwardly projectingarms 3 and with a cup 4 `said members constituting supports for a post or vertical shaft 5 which may be securedin the pedestal but will preferably be mounted for rotation within the arms 3 and in the cup 4, bushings 6 being provided in the arms?, and a step bearing7 being provided in the cup 4 to receive the thrust. Secured to or pivotally mounted upon the member 5 is an armShaving its rear end constructed" Specification of Letters Patent.

Patented Fens, 1920;

into a yoke 10 providing upper and lower bearing members 11 to receive a bolt or rodl 12 upon which is pivotally mounted a sleeve or hub 13 upon the rear end of the motor lsupport 14, the said hub being fitted between the members 11, as clearly shown in Fig. 1, and securing nuts 15 being mounted upon the ends of the pin or rod ,12 and turned home against the bearing members 11 to secure the said rod firmly in place. A motor 16, preferably driven by electricity, is secured to the support 14 and the casingof said motor Ais constructed with an elongated sleeve or hollow supporting arm 17` which projects forwardly therefrom and incloses the motor shaft 18. A bushing 19 is fitted in the outer end of the sleeve or housing 17 to furnish a proper bearing for the motor shaft and upon the outer side of the said sleeve 17, at the front end thereof, I secure or form the back wall 20 of a casing within which the feeding member rotates. A chute or hopper 21 is secured upon the upper portion of the back wall 20 and y the sand is fed into the said chute or hopper byany 'convenient' form of conveyer, which is not illustrated herein as it forms no part of mypresent invention. It is to be under;

stood that the hopper l.or chute should be of such dimensions or so connected with the conveyer that the shifting of the feeding elements to properly positionthe sand with- `in the molding flasks will not interfere with the proper delivery of ysand to the chute or hopper. `Secured firmly to the front. ex'- tremity of the motor shaft 18 is the-"hub 22 of a disk or other rotary member 23 which disk is provided at its periphery with a forwardly projecting rim or annular flange 24 which is reinforced and strengthened by spokes or braces 25/ extending tween the said rim and the hub 22. The disk 23 also carries a deflector or sand dinl .recting member consisting of a rearwardly flared ring 26 extending from the periphery indicated at 42;?, of thecasing are formed integral withgand project forwardly from the back wall 20, one of said walls being vertical `and the other wall having a lower curved portion, asfindicated at 28, and ter-y minating in a short horizontal floor or flange 29 which has its end or edge spaced from the lower extremity of the vertical straight end wall thereby providing ar discharge opening 30 through which. the sand may l passto the-flask. The front wall of the casing consists of a cover plate which pref- A erably consists of an upper member 31 and Aa lower member 32 having straight'meeting edges which are adapted to abut in the hori.

y-zontal plane of the motor shaft 18 and which are constructed with central concave ynotches or openings 33 corresponding in I diameter' to 'the diameter of the disk 23.

This construction will expose the spokes of the sand feeding member so that the operator may at all times observe the rotation of the said member and be informed as to the evenness of its action. provides ready access tothe inner securing bolts by which the sand-throwing vshoes are secured in position. The cover plates conform in outline to the end walls ofl the casing and are secured thereto by bolts pass:

ing through their edges and through flanges .At the upper ex- 34 on the end walls. tremities of the end walls, I provide inwardly projecting bosses 35 through which other fastening bolts are inserted to secure the 'upper portion of the cover plate in position. The top of the casing is covered by a shield consisting of an arcuate web 36 having a vertical flange 37 at its front edge tting against the upper cover plate 31 and secured thereto .by bolts 38. The' flange 37 terminatesadjacent the bosses 35V and the rear e fre ofthe web 36 is disposed close to the mouth of the chute or hopper 21 so that the. liability of sand flyin over or beyond the sand-.throwing mem' -r will -be .minimized The web 36, as shown most clearly in Fig. 4, terminates at one -side adjacent the boss 35 but at its other side extends tothe horizontal plane of the motor shaft so that it will serve `as a guide for` the sand and willprevent the same leaving the shoe until theshoe has reacheda point vertically over the discharge opening 30. The curved end wall of the casing is n provided with an opening 39 whichiwill per- 4 mit access tothe upper securing bolts of the shoes and will also permit the`inserti'on of a suitable too-Lshould there be any .accidental choking of the apparatus by reason of sand leaking past the shoes as the same move across the mouth Aof the hopper 'or chute. Q

At intervals around the rim 24 of the sand-throwing member, I provide the approximately radial curved arms 40 which It also vextend outwardly from the' rim and are re-` inforced by ribs or webs 41 connecting their 4 convex or rear faces with the rim 24.- The sand-throwing shoes are carried by these arms and in the presenti embodiment of my invention I' have illustrated three of such arms spaced eqidistantly around theJ disk so-that the disk will be balanced and 4will run easily and evenly without the employf ment of any additional weights or other counterbalances. The employment of three of said arms with the corresponding number of shoes is advantageous for the reason that the sand is carried around the wheel or feeding member through one-third of its rotation andl by employing three shoes spaced equidistantly the sand' is fed con-f stantly instead of being fed only one-third of the time. vA greater or less number of shoes, however, may, be employed without departing from the principles of my invention as the same is defined in the appended claims.

While the convex faces of the` arms 40 might -be utilized Aas the sand engaging and throwing elements, I prefer to employ the shoes illustrated in the drawings. These'- shoes consist of arcuate base members 42 tting closely against the concave surfaces of the arms 40 and provided at their rear ,edges 'with wings, ianges, or'blades 43 which in Itis thought the operation of the ma chine will be readily understood from what has gone before, but it ma be briefly summarized. The disk or feeding member 23 is rotated in the direction of the arrow appearing upon Fig. 4 and will move at ahigh speed so that the passage of the shoes across the mouth ofthe hopper or chute 21 ywill be sorapid as to 'be practically rcontinuous.' As each kshoe moves across the'mouth of the hopper or chute it will cut ofi' a portion of the sand and will force, the same around through'the conduit provided bythe front and rear walls Aof the-casing, the web 36 and the rim locity of the shoes" is such that the sand will require a very high momentum as it travelsv past the web 36 and will be thrown from'the casing through the discharge opening 30 24 of the rotary feeding memberv until the body of sand has nearly reached the terminal of the said web 36. The ve.

with great force so that by reason of its impact with the bottom of the flask, or the pattern, or the sand previously deposited n.

- Lezama the aslrs, it will be very rmly seated so that a very firm mold will be rapidly formed and the mold cavity very accurately shaped. The jointed construction of the support for thesand-throwingorfeeding mechanism permits the said'mechanism'to be moved over the area of the molding flasks and, consequently, the operator is enabled to govern the discharge of the sand so that it w1ll be deposited at such` points within the flask as it may be needed. The construction devised by me reduces the number of parts which have heretofore been found necessary in building machines for feeding sand centrifugally into molding flasks and thereby facilitates the setting up or disassembling of the machine and reduces the cost of installing and maintaining the machines. over, the construction which I employ permits the sand feeding or throwing elements to operate evenly at a higher speed than has heretofore been attainable and therefore re- 'ducesthe cost ofthe molding operation by .permitting the production of more molds within a given period. l

Having thus described the invention, what is claimed as new is: l

1. mechanism for the purpose set forth, the combination of a. jointed support, a motor carried by said support, a casing connected with said support, and a sand-throwing member disposed within said casing Vand operatively connected with the motor.

' end of said arm and arranged to have` 2. In an apparatus for the.` purpose set forth, the com ination of a rigid supporting member, a laterally extending arm mounted on said support for swinging movement, a motor support carried by the outer swinging movement r relative thereto, a motor, and a sand-throwing member oper-- atively connected with said motor, both carried by the motor support.

3. In an apparatus for the purpose set forth, the combination of a pedestal, bearing arms projecting from said pedestal in spaced relation, a cup-,disposed at the base of the pedestal, -a step bearing in said cup, a pivot member mounted in the spaced bearing arms and tting within said cup to be supported by the step bearing, alaterally extending arm fitted upon said pivot member between the spaced bearing arms for lateral Swingin movement, a yoke at the free end of sai arm, a motor carrier having a hub member fitted within said yoke, means for securing said hub-within the yoke for swinging movement, a'jcasimg secured to the motor carrier,`

a, motor mounted within the said easing, and a sand-throwing member also mounted within the casing and operatively connected with the motor. y

4. In an apparatus for the purpose set"v forth, the combination of acasing having a discharge opening in its bottom, means for supplying sand at the top of the casing, and means for forcibly projecting the sand from the casing comprising a rotatable.

member, and a plurality of equidistant sand engaging elements carried thereby.

Ymeans for forcibly projecting thesand from thelcasing bonsisting of a plurality of sandengagin the san -feeding means, and means for rapidly and successively moving said elements past the sand-feeding means.

7.111 an yapparatus for the purpose "set forth, the combination of a casing having a one wall formed by a web having one terminal disposed to" guide sand to the` discharge opening, means for feeding sand at said elements arranged to move past -discharge opening at one side .and having l an intermediate point of said web, and a' vplurality of sand-engaging elements movable successively and rapidly past the sandfeeding Ineansl and theI discharge opening.

8. In anapparatus for the` purpose set forth, the combination of a casing, means for feeding sand thereto, and a sand-throw ing means comprising al member mounted for rotation within the case, and a plurality of shoes secured upon the periphery vof said rotatable member and comprising anA ar- .curate web disposedapproximately radial to the member, and a wing at the rear edge rection of movement. e

9. Inan apparatus for the purpose set forth,l the combination of a casing, a chute supported on and extending into the casing, a rotatablemember mounted in the casing and having a' rearwardlyflared` ring eX- tending under' the said chute, and sandthrowing members carried by said rotatable member and movable past thev chute. j

10.In an apparatusfor thefpurpose )set forth, the combination of a casing comprisinga rear wall and end walls projecting` forwardly therefrom, one of said end walls bemg provided vwith an opening, a cover secured to the said end walls and forming the from the cover, said top plate comprising` an arcuate web having its terminals dis-- front of the said casing, a top plate secured to said cover and extending, rearwardly 70 5. In an apparatus for theV purpose set 110 of said web extending therefrom inthe di- )rear edge of said web and the rear wall of the casing, and a rotatable member mounted within'tlle casing andk provided with a sand- Ithrowing element extending to the said web and movable past the sand-feeding means.

11. In an apparatus for Vthe purpose set forth,A thel combination of a easing having an open bottom land provided with a top 10 plate having its 'ends disposed between the end walls ,of the easing, a rotatable member mounted within the casing and providedwith an approximately radial arm projecting close -to the top plate, vand a shoe remov- 15 ably secured to said arm.

vIn testimony whereof I affix my signature.v l

.EMEIS n. DUNsFoRD. [a 8.]

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