US2409121A - Dumping mechanism for molds - Google Patents

Description

Qca, 8, 1946.

A. FRITSCHLE DUMPING MECHANISM FOR HOLDS Filed ,April 29, 1943 3 Sheets-Sheet 1 #fram/EY Oct. 8, 1946. A. FRrrscHLE DUMIIING MECHANISM FOR MOLDS 3 Sheets-Sheet 2 Filed April 29,k 1946r A. FRITSCHLE wurm@ nmcaimrsu Fon uoLDs Filed 'April 29, 1943 :s sheets-sheet :s

lill H Patented Oct. 8, 1946 DUBIPING MECHANISM FOR MOLDS Arthur Fritschle, University City, Mo., assigner to American Smelting and Refining Company, New York, N. Y., a corporation of'New Jersey Application April 29, 1943, Serial No. 484,968

Claims.

The invention relates in general to the art of molding and more particularly to vmechanism for dumping the castings from the molds.

The invention relates to mechanism for dumping ngot molds of the types described and claimed in application Serial No. 443,274, filed May 16, 1942, entitled Multiple-bar, self-dumping mold, and which issued as Patent No. 2,330,277 on September 2B, 1943, although it is not limited to such use.

The prior application relates to a multiple ingot, separable two-section mold, the lower section comprising a water boshhaving a iiat surface constituting a chill plate. A removable name plate is secured with a cavity in the chill plate surface. The upper section is in the form of a perforate plate-like skeleton member havinga plurality of mold cavities extending entirely through the section. A hinge arrangement connects the two sections along one edge and a disengageable hand clamping arrangement connects the sections along the opposite edge. After themetal is cast, the clamping arrangement is disengaged and the upper section is raised and swung around its hinge to dump the metal bars from the mold.

According to a preferred form of the present invention, instead of unclamping the two sections for dumping the mold, the entire mold ,is hingedly mounted on a suitable framework about which the mold is swung to substantially invert the mold and dump the bars from the mold cavities. A suitable anvil arrangement takes the shock of dumping the mold and the framework is provided with clearance to receive a suitable dump car into which the metal bars may directly fall. Power mechanism for dumping the mold comprises a pivoted air cylinder mounted on the framework, the piston rod having a bail connected to the front of the mold and straddling lthe mold so as not to interfere with pouring. Suitableair valve control means is provided for operating Athe cylinder, both to move the mold to dumpingfposition and to return the mold to pouring position. If desired, suitable guides may be provided in the form of semi-circular slotted Ways in which rollers attached to the mold run to guide the mold and to take some of the Weight off the main dumping hinge.

The-invention also consists ,in certain new and original features of construction and combinations of parts hereinafter set forth and claimed.

Although the novel features which are believed to be characteristic of this invention will be particularly pointed out in the claims appended hereto, the invention itself, as to its objects and advantages, and the manner in which it may be carried out, may be better understood by referring to the following description taken in connection with the accompanying drawings forming a part4 hereof, in which Fig. 1 is a vertical side elevation of the mold dumping 'me chanism Fig. 2 is a front elevation;

Fig. 3 is a top plan View of that part of the mechanism supporting the mold;

Fig. 4 is an -enlarged vertical section taken on the line 4-4 of Fig. y3, showing the mold in dumping position; and

Fig. 5 is one of the metal ingots produced by the mold.

In the following description and in the claims, various details will Ibe identiiied by specific names for convenience, but they are intended to be as generic in their yapplication as the art will permit.

.Like reference ,characters denote like parts in the several figures of the drawings.

Referringnow to the drawings, `the mechanism comprises essentially .the mold I,.frame 'I I, supporting the mold by hinge I2, an operating cylinder I3 having a rod I4 connected to a bail I5 straddling the mold I and connected to the front thereof by pivot 56. The mold rests upon a front ledge 45 for pouring and contacts a back anvil `I 6 for dumping, the cast bars I'I falling into car I8. The slotted guides are arranged, one on each side, and extend from the front to the `lback of the apparatus, concentric with the dumping hinge I2, rollers mounted on shaft56 operating in the guideways.

The mold proper I0 comprises a water bosh 2| having a water chamber 22 and having one or more name plates 23 removably mounted in the top surface of the Water ybosh to constitute a chill plate. The water bosh 2I has a water inlet I9 on one side and a water outlet 25 on the other side connected lby iiexible hoses (not shown) to a suitable Water circulatory system for keeping the mold cool.

Secured to the water bosh 2I is a skeleton top plate 2,4 divided into mold cavities 25 Vand connected tothe water bosh by hinge devices 26 including rods 2I slidable in bosses attached to the water bosh 2I and having springs 28 acting to resiliently hold thetwo mold sections 2| and 24 together.

At 'the front end of the mold is a clamp whereby the mold sections may be easily separated. The clamp includes `lugs 3| secured to the water bosh 2 I and lugs 32 secured to the top plate24.

Links 33 are pivoted to lugs 32 and carry a rotatable eccentric drum 34 having a finger loop or handle 35. Thus, to separate top plate 24 from water bosh 2|, nger loop 35 is merely pulled outwardly to release the snubhing engagement between eccentric drum 34 and lugs 3l. This permits swinging the links 33 away from the mold so that the top plate 24 may be separated from base 4I has spaced rear columns 42 webbed orv gusseted for strength through which a rod I2 passes, the rod also passing through an enlarged knuckle 42' on the bottom of water bosh 2| to form the main dumping hinge. The front of the water bosh 2| hasa flange 43 and a depending boss 44 adapted to rest upon a front ledge 45 to locate the mold in pouring position.

To take the shock of dumping the mold, to help jar the cast bars or ingots I1 loose, an anvil I5 extending entirely across the frame is provided.

The anvil I6 comprises a holder 50 having an' anvil bar 5| slidably movable therein. Suitable cushioning material 52 is located between the anvil bar 5I and the bottom of holder 50. A raised lug 46 is provided along the front edge of top plate 24 to contact the anvil bar 5I.

The operating mechanism for moving the mold I between pouring and dumping positions comprises an ailcylinder I3 having trunnions 53 located in bearings 54 supported by the framework 45. The cylinder I3 has a piston 55 to which piston rod I4 is connected. Rod I4 is connected to bail I5 whose forked ends straddle the mold I0 and receive a shaft 55 which also passes through the flange 43 on the water bosh.

To help guide the mold and take part of the weight, semi-circular roller guides 60 are provided, concentric with the pintle I2 of the dumping hinge. The guides 5I! have slots 52 and have lugs connected by a bracing and spacing rod 6I. The front ends of the roller guides are bolted to the frame by bolts 53 and their rear ends by bolts 64; Rollers 65 mounted upon the ends of shaft 3 56 ride in the slots 6-2.

For` operating the piston 55, exible air lines I0 and II are connected to opposite ends of cylinder I3, these lines being connected to a valve i2 to which is also connected compressed air supply pipe i3. The valve "I2 has an exhaust port 'I4 and a rotatable plug 'I5 having passages E6 and G'I. Pedals 1'I 'and I8 are mounted upon the same shaft as rotatable plug 16.

The operation of the device is as follows:

Assuming the mold Il to be in the pouring position shown in Fig. 1, the molten metal is poured into the top mold vcavities 25. After the metal solidifles, the operator depresses the pedal 'I8 which connects compressed air source I3 with pipe IS causing the piston 55 to move to the right in Fig. 1, rotating the mold I0 about dumping hinge I2 causing the abutment 45 to engage the anvil bar 5I with a shock. rIhis jars loosethe metal ingots I1 which fallinto the waiting car I8. To return the mold to pouring position, the

pedal 'I'I is depressed, returning it to the position shown in Fig. 1. This connects pipe II to compressed air source 'I3 and pipe 'III to exhaust port 14, causing the piston 55 to return to the posi- 5 tion shown in Fig. 1, and causing the knee 44 on mold I0 to abut the rest 45 whereupon the mold is in readiness for pouring the next set of ingots. It will be understood that the guide slots 62 are longer than the corresponding movement of the l0 mold so as not to interfere with the engagement of abutment 46 and anvil bar 5I in dumping position or with the engagement of knee 44 with rest 45 in pouring position. The rollers 65 in the slots 62 assist in guiding the mold in its movement between positions, and in relieving the load on the dumping hinge I2. The bail I5 straddling the mold does not interfere with the pouring of the molten metal in any way. Nor does the dumping operation interfere with the flexible hose con- 2@ nected to water connections I9 and 20. The dumping and returning operation is accomplished wholly by power, eliminating all manual exertion and the necessity for separating the top plate from the water bosh 2I for dumping the ingots. It is only necessary to disengage top plate 25 from water bosh 2| when it is desired to change or renew the name plates 23.

The dumping mechanism is particularly useful with molds for casting various light metals and alloys, as, for example, type metal, solder, antimonial lead, babbitt, etc., although, of course, it is not limited to such use.

While certain novel features of the invention have been disclosed and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes may be made by those skilled in the art without departing from the substance of the invention.

What is claimed is:

l. In a self-dumping mold, a frame, an opentop ingot mold adapted to rest on said frame in pouring position, hinge means connecting the rear of said mold and said frame, an anvil in back of said mold to engage the mold when it is 45.. swung to dumping position, operating mechanism for moving said mold between pouring and dumping positions, a shaft passing through the front of said mold semi-circular slotted roller guides concentric with said dumping hinge, and rollers in said guides disposed on said shaft.

2. In a self-dumping mold, a frame, an opentop ingot mold adapted to rest on said frame in pouring position, hinge means connecting the rear of said mold and said frame, an anvil in back of said mold to engage the mold when it is swung to dumping position, operating mechanism for moving said mold between-pouring and dumping positions comprising bearings on said frame,

a cylinder having trunnions in said bearings, a

piston in said cylinder, a rod connected to said piston, a bail connected to said piston rod and straddling the mold, a shaft passing through the front of said mold and the ends of said bail, semicircular slotted roller guides concentric with said dumping hinge, and rollers in said guides disposed on said shaft.

3. In a self-dumping mold, a frame including a mold support having a front ledge and back standards, an open-top ingot mold having a lower .70 rear knuckle portion, a shaft passing through said rear standards and said knuckle portion forming a dumping hinge, said mold having at its front end a, depending boss adapted to engage lsaid front ledge to hold the mold in pouring position, said mold having a raised' lug extending across the mold, an anvil carried by said frame comprising a holder, a slidable bar in said holder, a cushion between said bar and the bottom of the holder, said raised lug engaging said bar to dump ingots from the mold, and operating mechanism for moving the mold between pouring and dumping positions comprising bearings on said frame, a cylinder having trunnions in said bearings, a piston in said cylinder, a rod connected to said piston, a bail connected to said piston rod straddling the mold, and a shaft passing through the front of said mold and the ends of said bail.

4. In a self-dumping mold, a frame including a mold support having a front ledge and back standards, an ingot mold made up of a lower water bosh and a flat top plate providing mold cavities, said water bosh having a lower rear knuckle portion, a shaft passing through said rear standards and said knuckle portion forming a dumping hinge, said Water bosh having a depending front boss adapted to engage said front ledge to hold the mold in pouring position, the front of said top plate having a raised lug eX- tending across the mold, an anvil carried by said frame comprising a holder, a slidable bar in said holder, a cushion between said bar and the bottom of the holder, said raised lug engaging said bar to dump ingots from the mold, operating mechanism for moving the mold between pouring and dumping positions comprising bearings on said frame, a cylinder having trunnions in said bearings, a piston in said cylinder, a rod connected to said piston, a bail .connected to said piston rod straddling the mold, a shaft passing through the front of said water bosh and the ends of said bail, semi-circular slotted roller guides concentric with said dumping hinge secured to said frame, and rollers in said guides disposed on said shaft.

5. Metal casting and dumping apparatus comprising: a frame, an open-top mold hinged at one end to said frame with its other end resting on the frame when the mold is in pouring position, an anvil carried on said frame to engage the said other end of the mold at its top when the mold is in its dumping position, fluid pressure means for inversive movement of the mold in an arc defined by the pivot axis of the hinged mounting of the mold aforesaid, and a bail member straddling said mold, said bail being pivotally attached to the free end of said mold and also connected to said fluid pressure means whereby upon actuation of the latter the mold may be moved from pouring position to dumping position and vice versa in the path of the arc aforesaid.

ARTHUR FRITSCHLE.

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