US1332939A - Sand cutting and screening mechanism - Google Patents

Description

H. L. WADSWORTH.

SAND cunme AND SCREENING MECHANISM. APPLICATION FILED APR. I2, 1917.

1,332,939. r Patented Mar.9,1920.

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/N WEN TOE Howard L H qasrrorfi H. L. WADSWORTH.

SAND CUTTING AND SCREENING MECHANISM.

APPLICATION FILED APR-12,19]?- 1,332,939. Patented Mar. 9, 1920.

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. .5 /3 772 4 70MB v UNITED STATES PATENT OFFICE. HOWARD L. VTAbSWORTH, 0F CLEVELAND, OHIO, ASSIGNOR T0 SAND MIXING MACIIINE COMPANY INCORPORATED, OF NEW YQRK, N. Y., A CORPORATION OF OHIO.

SAND CUTTING AND scannnme MECHANISM.

Specification of Letters Patent. Patented Mar. 9, 1920.

Application filed April 12; 1917. Serial No. 161,386.

To all whom it may concern:

Be it known that I, HOWARD -L. WADS- WORTH, a citizen of the United States, and

indicated to a device for cutting and screen-' ing sand, have more particular re ard to a machine designed to be used in oundries for cutting molding sand after it comes from the molds and at the same time for screening the sand to remove therefrom the various sprues and other articles which are always left in this sand.' The machine is further adapted to be automatically operated when moved over a sand pile. To the accomplishment of the foregoing and re-' lated ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawing and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings Figure 1 is a side elevation of my improved machine, showing the same in operation upon a sand pile; Fig. 2 is an end elevation of the same from the front; Fig.

3 is a plan view of the machine; and Fig.

4 is a section on the line 4 -4, Fig. 1.

Several machines have been desi ed and are in use for renovating or cutting used molding, sand, such machines beingof two The machines of one type screening being efl'ected without the necessity of raising the sand to any great height and without requiring any complicated or expensive machinery for this purpose.

The general constructionof the machine is best seen in Fig. 1, the machine consisting 'of a vehicle or framework which is movable over the ground and which consists of side and end members '1 and 2 respectively connected together to form a rectangular framework, upon which are mounted vertical members 3, which are in turn connected together by other side and end members, thus forming an open boxlike framework of considerable strength. This frame is mounted upon suitablewheels 4, these wheels bearing sprockets 5, which are driven by means of chains 51 operated from a sprocket 15 on a shaft 7 'on which there is mounted a suitable source of power, such, for example, as an electric motor 8. Adjacent to this motor 8 is a platform 9 supported by the upper" members of the frame upon which the operatorniay stand and control the operation of the vehicle.

The controlling devices, such as the switches for the motors, if one is .used, and the clutches (to be described presently),are grouped convenient to this platform, but it is not considered necessary to show such elements or their mounting in detail, and in themselves they form nopart of the present invention.

Mounted at the forward end of. the frame is an inclined surface formed by a hinged scoop 10, provided with small supporting rollers 50 at its forward end and adapted to rest upon the floor over which the vehicle is to move. The scoop is hinged about an axis 12 and is thus adapted to be swung up when not in use. Mounted above and adjacent to. the upper end of the inclined surface 10 is a cutter consisting of a plurality of curved blades 13 mounted to form a cylinder, this cylinder being rotatably supported in the frame and being driven by means of chains 14 operated over sprockets 15 on the shaft 7 and other sprockets 16 on the cylinder. The function of this cutter is to cut or,mix sand which is elevated by means of the inclined surface 10 and to throw the same rearwardly. In order to more thoroughly break up any lumps in the sand which may be missed by the cutter, and to remove articles 'WhlCh may collect tending portion having a slot 23 therein in' which operates a crank-pin 55 mounted on a sprocket 25'. The latter is carried on a short shaft in the form af a pin 24 set in a downwardly extending lug 56 attached to the side bar 1. The sprocket is operated by a chain 26 driven from a sprocket 57 on the shaft 7. and it will be understood that either one or more sprockets may be used to operate the screen, although I have here shown two such driving means. A shaking motion is thus given to the screen and the sand which is deposited thereon is very finely'broken up and is sifted down on to the floor between the wheels of the vehicle and forms a sand pile 28 asindicated in Fig. 1. r

Between the screen 20 and the cutting cylinder 12 'is a box 29 mounted below the level of the screen and adapted to receive articles such as pouring sprues, clamps and other small articles, which unavoidably get into the molding sand. These same articles, having considerable weight, are not usually. thrown onto the screen'by rotation of the cutting cylinder, but fall, as soon as they leave this cylinder, into this box 26 from which they may be removed at intervals.

The form of the inclined surface is indicated in Fig. 3, the surface of this scoop being preferably narrowed at its upper end so that it lies between the ends of the cutting cylinder 13, thus insuring that all of the sand raised bythis scoop is operated on by the cylinder. For the same reason the screen 20 is made wider than the cutting cylinder in order that it will receive all of the sand thrown backward from this cylinder, even though the sand is directed slightly toward one side or the other, and thus all of the sand which passes through the machine is both out by the blades of the cylinder and sifted by the shaking action of the screen. The sides and end of the screen are extended upward to prevent the falling of material.

The operation of the machine is controlled from the operators platform 9 by means of clutches 30- which control the connection of the sprockets 8 with the shaft 7 so that the machine may be eithenmoved over the floor and the'cutting cylinder operating simultaneously so that the forward movement of the machine may be stopped for the purpose of handing an unusual amount of sand which may be before the cutting cylinder For convenience both clutches are connected by arms 31 extending to, and operated by a pivoted handle 32. In this way the machine Leas es is adapted to handle without difficulty any inequalities in. the sand, pile which would otherwise cause the machine to choke up, or to pass the sand therethrough after prop erl mixing and screening it.

gther modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

Ithere'fore particularly point out and distinctly claim as my invention.

1. In a machine of the character described, the combination of a vehicle movable over the floor, an inclined sand feeding scoop mounted on said vehicle with one end resting upon the floor, a rotatable mixing cylinder mounted in said vehicle, and adapted to receive and agitate sand fromvthe ,top of said scoop, and a horizontal screen mounted in said vehicle to the rear of said cylinder anti adapted to catch the sand distributed from said cylinder, whereby all the sand is cut and screened in a horizontal plane above the floor. 7

2. In a machine of the character described,

the combination of a vehicle movable over .material from such sand.

3. In a machine of the character described, the combination of a vehicle movable over the floor and provided with wheels and a raised frame, an inclined sand feeding scoop mounted on said vehicle with one end resting on the floor, a rotatable mixing cylinder mounted in said frame and adapted toreceive and agitate sand from the top of said scoop and a horizontal screen carried by said rame to the rear of-said'cylinder and adapted to catch the sand distributed in a horizontal plane above the floor.

a. In a machine of the character described,

the combination'of a vehicle movable over the floor and provided with wheels and a raised frame, an inclined sand feeding scoop mounted on said vehicle with one end resting on the floor, a rotatable mixing cylinder mounted in said frame and adapted to re ceive and agitate sand from the top of said scoop, and a receptacle mounted in said vehicle between said screen and said cylinder and adapted to collect extraneous articles in such sand.

Signed by me, this 23rd day of March HOWARD L. WADSWORTH.

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