US1460085A - Apparatus for shaking out castings - Google Patents

Description

June 26, 1923.

H. c.v WATSON APPARATUS FOR SHAKING OUT CASTINGS 4 Sheets-Sheet l 'Filed May 22 1920' Gttozneg June 26, 1923.

H. C. WATSON APPARATUS FOR SHARING OUT CASTINGS 4 Sheets-Sheet 2 Filed May 22 1920 gnam/Hoz June 26, 1923.

. H. c. WATSON APPARATUSFOR SHAKING OUT CASTINGS Filed May 22, 1920 4 Sheets-Sheet 5 June 26, 1923. A 1,460,085

- H. c. WATSON APPARATUS FR SHAKING OUT CASTINGS Filed May 242 1920 4 Sheets-Sheet 4 EL v gnam/m, www

Patented .lune 26, 1923.

1,413,985 ETEN? Gli.

HARRY C. WATSONQ F CANTON, OHIO. r

APPARATUS FOR SHAKING OUT CASTINGS.

Application mea May a2, 1920. serial Naasasaa my invention.

Figure 2 is a section on the line II-11 of Figure 1.

Figure 3 is a sectional plan view, partly broken away, of a portion ofthe actuating mechanism, and

Figure 4 isa section on the lineIV-IV of Figure 3. y

My invention has relationtoy apparatus for shaking out castings from the sand in which they are cast; and is designed to provide an efficient and convenient apparatus by means of which the work may beefi'ciently performed in a manner which will not injure either the castingsor the flask in which the sand moldsl are made.

My invention also. provides .a machine or apparatus of this character, by means of which a plurality of castings may be shaken out at the same time. `1n its preferred form, it also provides a machine or apparatus of this character in which either a portion of the shaking out table, or the entire table may be utilized at any particular time for shaking out operations, thus permitting the capacity of the apparatus to be varied in accordance with requirements, and also per mitting one portion of the table to be used in shaking out while the other side is being unloaded and reloaded.

My invention also provides means whereby the sand and dirt shaken from the castings is readilytaken care of and removed.

The nature of my invention will be best understood by reference to the accompanying drawings in which I have shown a preferred embodiment of my invention and which will now be described, it being premised, however, that various changes can be made in the details of construction, arrangement and combination of the various parts without departing from the spirit and scope o f my invention as defined inthe appended claims.

In' these drawings, I havey illustrated a shaking out table comprising a series of spaced, parallel, longitudinallyI extending bars 2 which are fixedly secured to any suitable bed or foundation, such as indicated at 3. 4 designate vertically movable bars which are placed in alternating relation to the bars 2 and which are adapted to be actuated to raise the castings to be shaken out and drop themback upon the table ina mannerl to give .an eective shaking out action. These bars are pivoted at5 beyond the rear end of thetable and are actuated by mechanismsuch as now to be described.

6 designates an electric motor whose armature shaft 7 "is coupled to a drive shaft 8 (see Figure 3) through a suitable coupling 9 which is preferably of a non-rigid or semiresilient character.y Theshaft V8 carries a worm 10 which meshes with a worm wheel 11 on a transverse shaft 12 also having two spaced apart spur toothed pinions 13. These pinions mesh, respectively, with two gear wheels 14 which are sleeved upon opposite end portions of a crank shaft 15. The inner y faces of the gears 14 are cut away circularly concentrically with the axis of the crank shaft, as indicatedv atl, these cutaway portions being adapted'y to partially receive therein the segmental cheek members 17 between which is formed the crank pin 18. The outer ends of the cheek members 17 are curved to conform approximately to the inner periphery of the cutaway portion 16.

Eachv of these cutaway portions is kprovided with a projection 18l which is designed to engage the adjacent cheek piece and thereby form a driving connection for the crank shaft .throughout a portion of the revolution of the gear wheel 14.

The crank pin 18`is connected by a pity' man 19 with an arm 20 on the transverse rocker shaft 21. This shaft also carries, at opposite sides of the arm 20, two rocker arms 22 which are loosely sleeved on the shaft 21 and are designed to be connected ythereto throughthe medium of the respec* tive clutches 23. The movable member of eachof these clutches is arranged to be moved into and out of clutching engagement with the clutch portion ,of the arm 22 by any suitable means such as the hand operated screw shaft 24. One of these clutches with a portion of its actuating screw shaft is shown in detail in Figure 3.

25 designate pairs of links which connect the machine' started. During a portion of i the rocker arms I22 with three armed bell crank levers 26 of a second rocker shaft 27, which is cut in two, intermediate the two setsof connections 25. The links 25 are ar ranged in pairs both above and below thel shafts 21 and 27 in the manner shown in Figures 1 and 2. The third arm of each bell crank 26 is connected by a link 28 to the adjacent end of one of the shaker bars 4 before described.

29 designates flooring placed below the shaking out table and which is inclined downwardly and centrally in the manner of a hopper to a discharge opening 8O which is arranged to discharge the sand and dirt vshaken from the castings onto any suitable conveyer, such as the endless conveyer indicated at 31. Y i,

The operation is as follows:

The sand molds containing the castings to be shaken out are placed upon the table and each revolution of the gears 14 the projections 18a thereof will engage one of the cheek members of the crank shaft 15 in the manner shown in Figure 4 to vform a driving engagement therewith. The connections between the shaft 15 vand the vertically movable shaker bars 4 are so arranged that during this portion of the movement of the gearing,

which is substantially 180 degrees of rotation thereof, said shaker bars will be raised to their uppermost positions. The crank pin 18 will then have passed its upper center, and the weight of the castings and sand on the bars 4 will cause said bars to drop, the crank pin 18 during this dropping movement running ahead of the. gear wheels 14 so that the crank shaft williremain stationary until the projections 18a again catch up and come into contact with the cheek members 17. This sudden dropping of the shaker bars 4 to the level of the fixed bars 2 entirely under the accelerative effect of gravity, causes a very effective jarring movement to be eX- erted upon the sand and castings. This mechanismv produces a true gravity drop ,such as occurs in freely falling bodies, modi-` lied only by the friction in the mountings of the mechanism which come into play at this time. The sand and dirt thus shaken from the castings fall through the table onto the flooring 29 and thence to the conveyer 31, by which it is removed to any desired point.

By means ofthe clutches 23 before described, it will be readily seen that either one or bothsections of the table may be used simultaneously for shaking out operations, depending upon the capacity required. This also permits one section of the table to be used in shaking out, while previously shaken out castings are being unloaded from the other sections Vand a new load of castings is being placed thereon. i

The Ina-chine ory apparatus islsimple and positive in its construction and mode of operation, and exerts a shaking operation of a character which will not injure either the castings or flasks which may be `contained in the said molds. Its use enables a large number of castings, particularly relatively small castings, to be shaken out at the same time, thus enabling the shaking out operations to be rapidly performed.

I claim: i

1. Apparatus for shaking out castings, comprising a table having a series of spaced fixed bars, and a series of alternating vertically movable bars, together with actuating connections for "the movable bars, said con- :sections being operative to produce a posi-k tive raising of the movable bars and then inoperative to permit a substantially true gravity drop thereof independently of further movement of said connections, substantially as described. y

2. Apparatus for shaking out castings, comprising a table having a series of spaced fixed bars, and a series of alternating vertically movable bars, together with actuating connections for the movable bars, said actuating connections having means for raising said bars and then permitting them to drop independently of further movement of said connections under the weight of the load thereon, substantiallyas described.

' 3. Ak shaking out table for castings, comprising a series of fixed bars, a series of vertically movable bars, an endless take-off conveyer below the table, and means for directing the sand and dirt shaken from the castings to said conveyer, substantially as described. l y

4. A shaking out table having a series of vertically movable shaking bars, a rocker shaft having actuating connections with said bars, and means for positively actuating said rocker shaft in one direction and permitting said shaft to turn in the reverse direction entirely under the action of the load on said bars independently of further movement of said means after the rocker shaft has completed its movement in one direction, substantially as described.

5. A shaking out table having a plurality of vertically movable shaking bars, a rocker shaft having actuated connections with said bars, a crank shaft, actuating connections betweenthe crank shaft and rocker shaft,y and gearing for actuating the crank shaft, said gearing having a connectionwith the crank shaft which will permit .the latter to move ahead of the gea-ring during a portion of each revolution of the gearing.

6. Apparatus for shaking out castings, comprising vertically movable shaker bars, a crank shaft having actuating connections with said bars, a pair of gears loosely sleeved on said crank shaft at opposite .sides ofrits crank pin, means for positively actuating said gears, and driving connections between the gears vand the crank shaft which will permit the crank shaft to move independently of the gears during a portion of each revolution of the gears,` substantially as described.

7. Shaking out apparatus, Vcomprising a shaking out table having a plurality of vertically movable shaking bars, and a single means having operative connections for simultaneously actuating all or only a por` tion of said bars, substantially as described. 8. A shaking out table having a plurality of vertically movable shaking bars, a rocker shaft, said shaft being formed in two sections, actuating connections between said shaft and the shaking bars, and a single means whereby either or both of said sections may be actuated, substantially as described.

9. A shaking out table having a plurality of vertically movable shaking bars, a rocker shaft having actuating connections with said bars, a crank shaft, actuating connections between the crank shaft and rocker shaft, and

shaft which is eective only during one-half of the revolution of the crank shaft therev by permitting the crank shafttomove ahead of the gearing during the remainder of each revolution thereof, substantially as described.

10. Apparatus for shaking out castings, comprising a table having a series of spaced lixed bars, and a series of alternating vertically movable bars, together with actuating connections for the movable bars, and rotary means effective during one-half of each rotation thereof for positively operating said actuating connections for raising said bars, and thenpermitting said bars to drop independently of said connectionsunder the weight of the load thereon, substantially as described. f

In testimony whereof, I have hereunto set my hand.

I-L/ XRRY` C. WATSON.

Images