US1997392A - Sand handling apparatus - Google Patents

Description

April 9, 1935. w. F. PIPER 1,997,392

SAND HANDLING APPARATUS Filed Dec. 19, 1951 2 Sheets-Sheet l April 9, 1935. w R P|PER 1,997,392

SAND HANDLING APPARATUS Filed Dec. 19, 1931 2 Sheets-Sheet 2 Patented Apr. 9, 1935 UNITED STATE SAND HANDLING APPARATUS Walter F. Piper, Oak Park, m, assignorto The Beardsley & Piper Company, Chicago,.lll., a

, corporation of Illinois Application December 19. 1931, Serial No. 532,053 14 Claims. (01. cos-32s) terial. More particularly the invention relates to that type of riddling and feeding apparatus which has special utility in connection with the plane.

handling of molding sand and comprises a riddle equipped chute or hopper and; motor driven mechanism for operating or shaking the hopper for sand riddling and feeding; purposes.

One object of the invention is to provide an apparatus of this type which is more efllcient in operation than previously designed apparatus for the same purpose by reasonof the fact that the mechanism for operating the riddle-equipped chute comprises a shaft which is rotatably and eccentrically mounted in a motor driven fly wheel or like elementto rotate bodily in an upwardly inclined circular path and is connected at its upper end to the" chute so that during rotation of the flywheel it moves the chute or the portionof the chute to which it is connected in a corresponding upwardly inclined circular path and causes the sand to advance or move over the riddle with a hopping action dueto the vertical and lateral shift of the chute out of its'normal position or Another object of the invention is to provide a sand riddling and feeding, apparatus which is.

generally of new and improved construction and is adapted to be driven or operated at high speed without excessive wear and vibration of the various parts'thereof;

Otherobjects of the invention will be'apparent from a consideration of thefollcwing detailed description.

The invention consists in the several novel features which are hereinafter set forth and are defined more particularly by claims, at the clusion hereof. e

In the drawingswhich accompanyand form a part of thi'sspecification. or'fldisclosure and in which like numerals o'f reference denote-corresponjding parts throughout the; severalflviewsz Fig. 1 isa slde'clevation of a sand projecting machine having'mounted thereon apparatus embodying the invention. Fig. 21s an enlarged tion throughv the mechanism for operating the riddle-equipped feed chute. Fig. 3 is a horizontal section on theline 3 3 of Fig. 2. Fig.4 is a section on the line 4-4 of Fig. 2. Fig.5 is a section on the line 5-5 of Fig. 2. Flg. 6 is a section on the line 6-6 of Fig. 1. Fig. 7 is a side elevation of the supporting strut for the front or discharge end of the chute, parts being shown in section.

The apparatus which forms the subject matter of the invention is designed primarily for use in riddling' and feeding molding sand and comprises a chute or hopper l0 and mechanism for operating or shaking the chute. As shown in Figs. 6 and'l, the chute is provided with a riddle II for screening or .rlddling the sand delivered to the chute. The screen separates the scrap metal from the sand delivered to the chute, and dischargesit laterally through an outlet I2. The screen also .serves to cut or disintegrate the lumps of sand and to mix it in transit to the mold. The chute and its operatingmechanism are mounted to move laterally with anarm l3 which is pivoted on a standard Hi. The sand is delivered into one end of the chute and is discharged at the otherend thereof. a A second arm 9 is pivoted to the outer end of arm It and carries a rotary projector 8 for slinging the sand into molds, as exemplified in Patent No. 1,408,493. The sand discharged from the chute I0 is dellvered onto a feed belt 9% which delivers the sand'tto. the projector. The chute is operated or vibrated by the mechanism hereinafter described to screen the sand and discharge it at l5 onto the belt-8'. Arms l3 and 9 permit the projector 8 to be moved horizontally over molds so that all portions thereof can belrammed with sand.

The mechanism for shaking or operating the "chute is supported by a bracket l6 which is bolted to a-sle'evel H to which the inner end of a'rm- II is secured. Bracket 16 comprises an annulus l6 and an upwardly inclined lateral extension. l8 in which is secured a fixed shaft IS. A cover l6 is bolted to the top of the annulus It. An electric motor 20 fordriving the gearing for vibrating the chute is secured to the outer end of extension l8. Shaft I8 is pressed into a socket It, and serves to support a flywheel 2l forrotation on an. axis which is fixed end of socket and carries apacking ring 22 to, exclude sand from and retain lubricant in said socket. The fly wheel is driven byfa pinion 2! which is fixed to the armature shaft of motor 20 and a gear 26 which is disposed around the hub of many wheel and is secured bybolts 28 to a flange 2'! integral with the hub. The fiy-wheel2l is provided with a depending flange 2| and has a top wall 2| to enclose or cover the driving gears. The upper portion 2i of the hub of the fly wheel is eccentric to the axis of the shaft I9 around which the fly-wheel rotates and has an eccentric socket 29 in which is journalled a shaft or wrist-pin 30 which has its axis parallel to, but eccentric relatively to the fixed shaft l9. Roller bearings 3| are mounted in socket 29 between shaft 30 and the hub 2|. A spacing collar 30* is fixed to shaft 30 between bearings 3| to hold the shaft against axial movement relatively to the fly-wheel. A screwring 32 closes the upper end of socket 29 and carries a packing ring 33 to exclude dust from and retain lubricant in said socket. A duct 34, which is closed by a screw-plug 35, is provided in the hub of the fiy-wheel for delivering lubricant into the sockets 22 and 29 which communicate with each other. A duct 34 is also formed in the hub of the fly wheel and is closed" at its lower end by a fitting 34 through which grease may'be forced into the sockets. Lugs 35, each held by a screw 31, are adapted to lock the screwrings 24 and 32 against becoming loose. A circular cover plate 38 is secured by a bolt 39 to the upwardly projecting end of eccentric shaft 30 to exclude sand from the top of the fly wheel and around shaft 30. The fiy-wheel is provided with a weighted portion 2| to' counterbalance the eccentric hub and cause it to rotate smoothly at high speed.

A transversely extending saddle bar 40 is fixed to the upper end of the eccentric shaft 30, and a bushing 40 which is semi-circular in cross section is secured in said bar. Said bushing has a cylindrical seat for a cylindrical bearing-rod 4| which is welded to a reinforcing plate 42 which is rivetted to the bottom of chute I0. Bolts 43 pass through rod 4| and slots 44 in bar 40 and bushing 40 and hold the chute seated in the bushing and against transverse movement,

-while permitting relative longitudinal, pivotal movement of the chute. The discharge end of the chute is supported by a strut rod 48. The upper end of rod 46 terminates in a bearing ball 46, and a bearing 41 with a ball socket seats on said ball to provide a hearing which permits relative pivotal movements of the chute and said rod. Bearing 41 is confined in a sleeve 48 which is welded to a reinforcing plate Ill on the chute III. A bolt 49 extends through sleeve 48 and a slot 46 in the rod 46 to hold the socket seated on ball 4|; without interfering'with the relative pivotal movements of the chuteand the rod. The lower end of rod 46 is clamped by bolts 50 and plate 5| to the upper end of a transversely extending cushion plate 52 which is formed of rubber and extends transverselyjsufficiently to hold yieldingly the rod 46 against substantially transverse movementwhile permitting the rod to swing longitudinally of the chute, the cushion being readily transversely flexible for this purpose. The lower end of cushion 52 is clamped by bolts 53 and a plate 54 in abracket 55 which is secured by a bolt 56 to the tubular supporting arm l3.

The bottom wall of chute Ill and screen II, as illustrated in Fig. 2, extend substantially in horizontal planes when the chute reaches the "limit of its forward stroke. The parallel axes of eccentric shaft 30 and fixed shaft iii are inclined relatively to the bottom of the chute to cause the "saddle, which supports the delivery end of the chute III, to move back and forth in an inclined plane. The axis of the strut-rod 46 which support the discharge end of the chute is also inclined and approximately parallel to the axis of the shaft 30. When the motor is running, the flywheel will be rotated on the fixed shaft l9, and eccentric shaft 30, will be shifted bodily in a circular path. This circular movement of the shaft 30 will impart a corresponding movement to the delivery end of the chute, so the latter will be shifted laterally and longitudinally. The shaft 30 moves in a circular plane which is inclined relatively to the bottom of the chute to cause the bottom of the chute and the screen to be shifted from an inclined plane to a substantially horizontal position during the outstroke of the chute. The impulses imparted to the material by the movements of the chute will cause the sand to be projected forwardly with a hopping action and discharged at I 5 from the chute. This may, if desired, be accomplished by the mechanism described without bringing the chute into a downward inclination toward its discharge end. The lateral movement imparted to the chute by the fiy-wheel and eccentric shaft 30 causes the sand to be spread transversely across the chute, and this results in eiilciently and speedily riddling the sand, and makes itpossible to feed the large volumes of sand required for a sand projector. The rod 46 and its ball bearing pivotally support the discharge end of the chute to permit longitudinal and transverse movement of the delivery end by the eccentric shaft, and serve further. to prevent the chute from rotating bodily around the flywheel during drive of the latter.

In cutting and feeding molding sand at the desired rate to keep the projector supplied for high speed sand slinging, it is necessary to 0p-v feeding and screening the sand. The discharge endof the chute is cushioned so practically no vibration will be imparted to the outer end of the supporting arm. l3 by the discharge end of the chute. As a result the apparatus has been found in practice to operate smoothly at highspeeds without causing destructive vibration in the arms for supporting the projector, and this eliminates wear which results from such vibration.

The invention is not to be understood as restricted to the details set forth, since these may be modified within the scope of the appended claims, without departing from" the spirit and scope of the invention. I

Having thus described the invention, what I claim as new and desire to secure by Letters Pat cut, is: g

1. In apparatus of the character described, the combination of a horizontally extending, riddleequipped chute for receiving granular material, and mechanism for operating the chute for material' riddling purposes comprising a rotatable shaft disposed beneath one end of the chute and mounted to revolve bodilyin an upwardly inclined circular path, a connection betweenthe upper end of the shaft and said one end of the chute whereby the said one end of the chute will be shifted in a corresponding upwardly inclined circular path by the shaft and the chute will be shifted vertically and laterally out of the normal plane thereof and the material therein will be advanced with respect to the riddle with a hopping incl action, and mechanism for revolving said shaft in the aforementioned path.

2. In an apparatus of the character described, the combination of a horizontal, material-receiving chute, and mechanism for operating the chute comprising an upwardly inclined shaft having a fixed axis, a rotatable flywheel on the shaft, a second shaft mounted 'rotatably and eccentrically in the wheel and projecting upwardly from the latter, said second shaft being parallel with the first mentioned shaft and adapted to revolve bodily in an upwardly inclined circular path during rota- .tion of the flywheel, a connection between the upper end of said second shaft and one end of the chute whereby said one end of the chute will be shifted in a corresponding upwardly inclined circular path by the eccentric shaft, and the chute will be shifted vertically and laterally out of the normal plane thereof and the material therein will be advanced with a hopping action, mechanism for driving the flywheel, and a pivotal support for the other end of the chute;

3. In apparatus of the character described, the combination with a horizontal material-receiving element mounted to swing vertically, of

. mechanism for shifting said element comprising an upstanding shaft with a rotatable fixed axis, a wheel on said shaft, mechanism for driving saidv wheel, a rotatable shaft eccentrically rotatably mounted in the wheel and operable in a circular path by the rotation of the. wheel, and a connection between the eccentric shaft and the element whereby a portion of the element will be operated in a circular pathby the eccentric shaft,

and supported to swing vertically, said connection comprising a transversely extending saddle attacheddirectly to the eccentric shaft and a bearing bar in the saddle and applied to the element for holding the eccentric shaft and the ele ment against relativerotation.

1 4. Mechanism for shifting a chute, comprising in'co'mbination an upstanding shaft having a fixed axis, a fly-wheel mounted on said shaft, gearing directly beneath the fly-wheel for driving the latter, a depending annular flange on the fly-wheel for enclosing said gearing, a shaft ec'centricaliy mounted in the upper part of the fly-wheel and bodilyrotatable in a circular path by rotation of the wheel, and means associated with the upper end of the eccentric shaft for attachment to the chute.

5. In apparatus of the character described, the combination with an arm pivoted to swing horizontally, and a chute and riddle movable laterally with said arm, of mechanism for shifting the chute, mounted on the arm and comprising an eccentric shaft mounted to move in a circularpath, a connection between the chute and said shaft whereby one end of the chute will be shifted in a corresponding circular path, a cushioned pivotal support between the arm and the other endof the chute, and mechanism for moving said shaft in said circular path.

6. In apparatus of the character described, the

combination with a support and a horizontally movable chute carriedby said support, of mechanism for shifting the chute, mounted on the support and comprising a shaft eccentrically mounted to travel in a circular path, mechanism for moving said shaft'in said circular path, a connection between the eccentric shaft and one end of the chute whereby the chute will be shifted in a corresponding circular path, and a cushioned vertical strut for pivotally supporting the other end of the chute.

by the'shaft during movement thereof and the,

element will be shifted vertically and laterally outof the normal plane thereof and material therein will be advanced with a hopping action, a strut for supporting the other end of the chute,

and a ball-bearing between the strut and the chute. Y

8. In apparatus of the character described, the

combination with asupport and a substantially horizontal chute carried movably on said support,

of mechanism for shifting the chute, mounted a on the support and comprising a shaft eccentrically mounted to travel in a circular path, mechanism for rotating the shaft in said circular D8th,'8. connection between. the eccentric shaft and one end of the chute whereby the chute will be shifted in a corresponding circular-path, a strut for. supporting the other end of the chute, and an elastic support for the strut.

9. In apparatus of the character described, the

combination with a feed chute, of mechanism for shifting the chute comprising an eccentric shaft mounted to move in an upwardly inclined circular path, mechanism for operating said shaft, means between the chute and-the shaft whereby one end of the chute will be shifted in a corre-' sponding upwardly inclined circular path in response to operation of the shaft in order to shift the chute vertically and laterally to advance material therein with a hopping action, said chute being pivoted to swing vertically and transversely tothe plane of, said circular path, and a pivotal support for the other end of the chute which permits universal movement of the chute.

, :10. In-apparatus of, the character described,

the combination with a feedchute,-of mechanism" for shifting the chute comprising an eccentric shaft mounted to move in an upwardly inclined circular path, mechanism for operating said shaft,

sponding upwardly inclined circular path'in response to operation of the shaft in order to shift the chute vertically and laterally, said chute being pivoted to swing vertically and transversely to the pinned said circular path, a strut for superally with said arm, of mechanism for shifting:

the chute mounted on the arm and comprising an upstanding shaft, a bracket fixed to the proximal end of the arm and to which said shaft is secured, a wheel supported; on the shaft, a motor mounted on the bracket, gearing for driving said wheel from the motor, a shaft rotatably supported by the wheel and eccentrically mounted in the wheel to travel in a circular path, and aconnection between the eccentric shaft and the chute,

whereby the chute will be supported shifted in a corresponding circular path in response to drive of the wheel.

12. In apparatus of the character described, the combination with an arm pivoted to swing horizontally, and a chute and riddle movable laterally with said arm, of mechanism for shifting the chute mounted on the arm and comprising an upstanding shaft, a bracket fixed to the proximal for permitting the chute to swing vertically relatively to the eccentric shaft.

l3. In combination, a substantially horizontal riddle-equipped chute for receiving granular material, and mechanism for operating or shaking the chute for material riddling purposes, com-' prising an inclined rotatable shaft disposed under the chute and mountedto revolve bodily in an upwardly inclined circular path, a connection between the upper end of the shaft and saidchute whereby the chute will be shifted in a cerrespond ing upwardly inclined circular path by the shaft and the material will be moved with respect to the riddle with a hopping action as the result of the combined vertical and lateral displacement of the chute out of its normal plane, mechanism for revolving said shaft in the aforementioned path, and means for preventing the chute from swinging bodily around the shaft when it is shifted or operated by the latter.

14. In combination, a substantially horizontal material receiving ohute, and mechanism for operating the chute for material shaking purposes comprising an upwardly inclined shaft having a fixed axis, a rotatable member on the shaft, a second shaft mounted rotatably and eccentrically in said inember and projecting upwardly from the latter, said second shaft being parallel with the first mentioned shaft and adapted to revolve bodily in an upwardly inclined circular path during rotation of the member, a connection between the upper end of said second shaft and the chute whereby the chute will be shifted in a cor-- responding upwardly inclined circular path by the eccentric shaft and the material therein will be moved with ahopping action as the result of the combined vertical and lateral displacement of the chute out of the normal plane or position thereof, means applied to one end of the chute for preventing the chute from swinging bodily around said second shaft during shift by the latter, and means for driving the rotatable member.

WALTER F. PIPER.

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