US1137658A - Foundry molding-machine. - Google Patents

Description

W. D. ODDY.

FOUNDRY MOLDING MACHINE.

APPLICATION FILED SEPTJS, 191

Patented Apr. 27, 1915.

4 SHEETSSHEET I.

"E NORRIS PETERS C0,. FHOTO-LITHO WASHINGTON. D. 2:.

W. D. ODDY.

FOUNDRY MOLDING MACHINE.

APPLICATION FILED SEPT. 15, 1913.

1 13?,658 Patented Apr. 27, 1915.

4 SHEETSSHEET 2.

THE NORRIS FEIERS CO. PHOT0-LITHO.. WASHINGTON, D.

W. D. ODDY.

FOUNDRY MOLDING MACHINE.

APPLICATION FILED SEPT-l5, 1913. 1 1? @5 Patented Apr. 27, 1915.

4 SHEETSSHEET 3- WWW THE NORRIS PETERS 60., PHOTO-LITHQ. WASHINGTON, D. c.

WLD. ODDY.

FOUNDRY MOLDING MACHINE.

APPLICATION FILED SEPT.15, 1913.

Patented Apr. 27, 1915.

4 SHEETSSHEET 4.

jm/elzfora W/zilzam Q Oddy. M n .41? 9;.

THE NORRIS PETLK 00., PHOTIFLITHO, WASHINGTUN. D. C.

UNTTE %TAT PATENT @FFTQE.

VILLIAIVI DAVEY ODDY, OF LEEDS, ENGLAND, ASSIG-NOR 0F ONE-HALF T0 HENRY RICHMOND AND SONS, LIMITED, 0F LEEDS, ENGLAND.

FOUNDRY MOLDING-MACHINE.

Application filed September 15, 1913.

To all whom it may concern Be it known that 1, WILLIAM DAVEY ODDY, a subject of the King of Great Britain and Ireland, residing at Leeds, in the county of York, England, have invented certain new and useful Improvements in Foundry Molding-Machines, of which the following is a specification.

This invention relates to foundry molding machines used for the production in quantity of molds of exactly similar pattern, and has for its object to obtain greater uniformity in the density of the sand, notwithstanding that molds may be of considerable thickness or depth, and may be of considerable variation in contour.

This invention consists in a construction of machine such that the filling and pressing of the sand into and in the mold boxes takes place automatically in successive stages, that is, a portion only of the sand required to fill the mold is introduced and then pressed, after which a second portion is introduced and pressed and so on till the mold is filled.

The invention is hereunder illustrated by and described with reference to the accompanying drawings, in which- Figure 1 is a plan, and Fig. 2 is a vertical section on lines A O and O B of Fig. 1. Fig. 3 represents a vertical central section on the line DD of Fig. 4; Fig. at represents a plan of the ring casting provided with gear wheels 7 and it, Fig. 5 represents a detail view partly in vertical section and partly in elevation, showing the sectional sand chute, roller, guide-pins and proximate parts; Fig. 6 represents an external elevation at right angles to Fig. 2, the view being taken from the right side; and Fig. 7 repre sents an under view of receptacle 8 from which the sand is fed down to chute 10 (see Figs. 2 and 5). For the sake of clearness the chute is omitted from this figure.

a is a circular table, provided with a series of symmetrically disposed openings 5 to receive the bottom pattern plates 0, and sup ported loose, i. e. capable of being rotated, on a cylindrical support d cast on or attached to a central pillar e. The table is intermittently rotated by means of so-called mutilated gearing h turning with toothed wheel f, carried in a circular race 9, and constantly rotated from a first motion shaft 72, situated in any convenient position radial Specification of Letters Patent.

v Patented A t. 27, rats.

Serial No. 789,763.

to the center pillar e, by means of a pinion B, Figs. 1 and 3.

The use of so-called mutilated gearing for intermittently rotating foundry molding tables is not new, and a construction of such is hereunder described in detail for the purpose of more clearly and completely describing this improved machine.

The ring carrying or forming the wheel f, has an inner curved row of teeth, extending over a portion only of the circumference, and forming the so-called mutilated gear wheel h. For the sake of illustration merely, the teeth are supposed to extend over three sevenths of the circumference and to nuniber, say 54. A pinion 2' having 18 teeth and mounted on a counter-shaft j, gears with the teeth of the mutilated wheel b, so that the countershaft j makes three revolutions during three sevenths of each revolution of the wheel f, and remains stationary during four sevenths of each such revolution. As shown, a second countershaft 7c is geared by equal sized wheels Z with the countershaft y, and carries a pinion 1%, provided with let teeth, gearing with the toothed wheel n, having 126 teeth, attached to the table a. As the shaft rotates three times before becoming stationary, it moves the table one third of a revolution between each stoppage, corresponding to the division of the table between the centers of the successive openings Z), so that during a complete revolution of the table a, it stops three times; the ratio of the times of moving and stopping being as three to four.

The bottom pattern plates 0 are carried level with the table by a carriage 0, supported on antifriction rollers 39, which run upon a circular track 9, carried by conveniently placed standards 1", except when the pattern plates are beneath the press, when the bearing lugs s of the carriage 0 rest directly on the supports or standards 1.

t are the mold boxes, the sides of which rest partly on the table and partly on the pattern (bottom) plates 0.

u are the pressing plates, carried by the press crosshead o, guided in slides '10. The crosshead is raised and lowered by connecting rods w, actuated by the toothed crank pin disks g fixed on the shaft 2. The toothed disks 3 having teeth, gear the pinions 1 having 20 teeth. The pinions 1 are mounted on acountershaft 2 provided with a pinion 8 having 18 teeth, the pinion 3 gearing with the 54 teeth of the mutilated wheel h at a time when the latter does not actuate the mutilated gearing it previously described for rotating the table a.

Immediately on leaving the last press, each bottom pattern plate 0 passes over the depressed portion g of the circular track 9 Fig. 6, so that the top of the pattern plate passes beneath a brush, which sweeps off any loose grains of sand. The brush may be flat, stationary or movable. As shown the brush 1 is cylindrical, carried on the fixed spindle 5 and rotated when a bottom pattern plate passes beneath it by a pinion 6 attached to the brush, gearing with the corresponding one of, in the case illustrated, three racks 7, fixed to the underside of the table a.

As the carriage 0 rises from the depressed part of the track, it raises the bottom pattern plate 0 again flush i. 6. level with the table a. The mold box 25 can be drawn away from the opening I), as soon as the pattern plate is lowered quite clear of the molded under surface of the sand in the mold box;

and is replaced by a fresh mold box before reaching the first sand supply chute.

8 is a tank or receptacle containing the supply of sand, and provided with two or more openings 9 according to the number of chutes 10. Each chute 10 is provided with a tapering lower section 10 hinged thereto at 23 and arranged at an angle for convenience of delivery.

11 is a circular channel attached to the underside of the receptacle 8 and passing beneath the openings 9.

12 are two or more scrapers according to the number of chutes, and which sweep around the channel 11 (Fig. 2) pushing the sand into the different chutes, as the molding boxes come beneath the respective chutes. The inner side of the channel leaves a gap between its upper edge and the bottom of the receptacle 8 for the arms 13 carrying the scrapers 12. The arms 13 are driven around at the same angular speed as the table by means of a gear wheel '14 attached to the table, pinion 15, vertical shaft 16 and pinion 17, gearing with a gear wheel 18, carried from the center plate 19, from which the arms radiate. The boss of the center plate is formed in two halves bolted together and is carried on a turned flange and bearing 20 at the upper end of the center pillar e.

As shown in Figs. 1 and 7 21 is an automatically moved slide orshutter for regulating the amount of sand allowed to pass down the chute, the opening movement be- 7 ing effected by lever or bar 21*, mounted on pivoted links 21 said bar being in contact at one of its ends with, and actuated by, a cam or tappet 21 on the ring carrying the tion to yield on contact with one of said pins, so that its lower end may clear the same.

In some cases I propose to effect the pressing of the first layer of sand by a roller 2 1, carried by arm 25, hinged to a bracket 27 preferably attached toa support 26 rigid with the previously mentioned cylindrical support (1, which is cast'as part ofthe pillar e as shown in Fig. 2. The hingingof the arms 25 allows of the roller automatically adjusting itsheight and clearing the guide pins 22 of the mold boxes.

Referring to Fig. 1, the empty mold box is placed on the table at the position marked I, and passing the position marked II receives the first layer of sand from the ad joining chute, and then passes beneath the roller 24 by which it is spread out. It next passes beneath the second chute at the position marked III, where it receives a second layer of sand; and thence to the first press where it remains stationary while the sand is being pressed; the toothed portion a of the wheel 72, passing beneath the pinion 3, see Fig. 2, and the mutilated or. toothless portion passing beneath the pinion 2'. While the table is thus'stationary, a; second mold box is placed overthe next succeeding openreaches the last press; where the table remains stationary during :the pressing. .At.

this time a third mold box is placed over the third opening at the position marked I, while the second mold box'is underthe first press. i

porting the bottom pattern plate moves over the depressed portion ofthe raceg, so that the top of the pattern plate is swept by the brush 4. At the same time the mold box with the sand is removed, and replaced by a fourth mold box, which follows the course just described for the first box. fourth mold is at the position marked I, the second and third mold boxes are respectively under the second and first presses.

Where the articles to be cast require a two part mold, the contour of the bottom pattern plates is such as to form the upper part of On leaving the last press the carriage sup- When the v the mold; while the contour of the underside where three presses are used, may be only approximately contoured to the shape of the bottom part of the mold; the press plate of the last press however being accurately contoured. As the mold boxes are removed they are placed one on the top of the other to form a pile ready for the casting operation. IVhere the articles require only one part molds, the pressing plates are quite fiat.

I am aware that prior to my invention brick presses have been proposed, in which the edges of the sand filled mold have received a preliminary pressing, the space so obtained being filled up with sand and the mold box transferred to a second press acting over the whole surface of the sand, for the purpose of producing bricks denser and harder around the sides and ends. I do not therefore claim such, but

What I do claim and desire to secure by Letters iatent is 1. In a foundry molding machine, the combination of a rotatable table having a series of openings, mechanism for rotating said table adapted to temporarily stop the same during each rotation as many times as the number of such openings, provided with patterns and individually fitting such openings, mold boxes surrounding the latter, means for automatically applying sand to said patterns and means for pressing the sand therein and completing the mold, these means for filling and pressing being arranged for alternative action to supply and press successive layers of sand in order that all parts of the filling may be perfectly packed during a rotation of the table.

2. In combination with an intermittently rotated table provided with openings, mold boxes adapted to surround the same, pattern plates fitting said openings, spouts for supplying the mold box with a layer of sand corresponding to each pause in rotation, presses arranged alternately with respect to said spouts to act on each layer after it is supplied and means for lowering each of said pattern plates from its opening after the work of filling and pressing has been completed.

3. In combination with a mold-carrying table and mechanism for rotating it, with several stops during each rotation, means for'supplying a layer of sand to each mold box, means for pressing each layer at each stop after it is thus supplied and helping to form the upper part of the mold, pattern plates carried by said table and constituting the bottoms of the mold boxes and means for automatically removing said pattern plates after such pressure for the purpose set forth.

4:. In a foundry molding machine, the combination of an intermittently rotated table provided with three or more openings, a succession of vertically movable bottom pattern plates, fitting said openings, two or more automatically controlled sand delivery chutes and two or more succeeding presses alternating with said chutes and pressing plates attached to said presses, substantially as and for the purpose set forth.

5. In a foundry molding machine the combination of an intermittently rotated table provided with a series of openings, with vertically movable bottom pattern plates fitting in said openings respectively, mold boxes each of which surrounds one of said openings, actuating gearing for the press below mentioned, a table driving rack, a circular first motion rack, so-called mutilated gearing between the said table driving rack and said circular first motion rack, and also between the press actuating gearing and said circular rack, a sand supply tank or receptacle, an automatically controlled delivery chute from said tank to the top of each mold box, a press or pressing device situated between each pair of successive delivery chutes and after the last delivery chute, a pattern plate supporting race having a depressed portion immediately after the last press, and a sweeping brush situated above the pressing plate when the latter is on the depressed portion of said race; all substantially as and for the purpose of obtaining greater uniformity in the density of the sand by filling and pressing the sand into and in the mold boxes simultaneously in successive stages.

6. In a foundry molding machine, the com bination of an intermittently rotated table having three or four symmetrically disposed openings therein, a series of mold-boxes arranged respectively at said openings, a corresponding series of vertically movable pressing plates arranged to descend therein for forming the lower part of a mold, the said plates being provided with pattern sur faces and the pressing plate of the last press exactly corresponding in the contour of its pattern surface to that of said mold, but the other pressing plates of the series having pattern surfaces which correspond only approximately to that of said mold.

7. In a foundry molding machine having an intermittently rotated table the combination of two or more presses, a sand delivery chute on the approaching side of each press, a sand supply receptacle, having openings in the same to the upper end of each chute, rotating scrapers and an automatically operated shutter situated at the upper end of each chute.

8. In a so-called mutilated gear wheel. device for intermittently rotating the mold box carrying table of foundry molding machines, the combination of said table with a ring arranged to drive the same and having a complete outer circle of teeth and an inner partial or mutilated circle of teeth, a driving pinion geared to said outer circle of teeth, a gear wheel attached to said table, a pair of tilated' gear Wheel device, of a countersliaft,

a pinion on the same geared With the mutilated gear Wheel of said device, a pair of pinions on the ends of said countershaft and press actuating toothed crank disks geared With said pinions, all in combination and substantially as and for. the purpose set 15 forth.

In testimony whereof I have signed my name to this specification in the presence of tWo subscribing Witnesses.

WILLIAM DAVEY 'ODDY.

Witnesses:

J. CLARK JEFFERSON, ERIC SoULLIN.

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

Washington, D. 0. i

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