US1768233A

US1768233A - Mechanism for shaking out molds

Info

Publication number: US1768233A
Application number: US161224A
Authority: US
Inventors: Edwin S Carman
Original assignee: Osborn Manufacturing Corp
Current assignee: Osborn Manufacturing Corp
Priority date: 1927-01-14
Filing date: 1927-01-14
Publication date: 1930-06-24
Anticipated expiration: 1947-06-24

Description

June 24, 1930.

E. S. CARMAN MECHANISM FOR SHARING OUT HOLDS Filed Jan. 14. 1927 3 Sheets-Sheet 1 7700 7 Level INVENTOR. f

clw in S. C rm Jllm 30' E. s. CARMAN IECHANISI FOR SHAKING' OUT HOLDS 3 'Sh eets-Sheet 2 Filed Jan. 14. 1927 m 'ENTOR. fazdzzz (22-22242 BY 861 0% a .-1TTOR.\'EY

June 24, 1930. E. s. CARMAN MECHANISM FOR SHARING OUT HOLDS Filed Jan. 14, 1927 3 Sheets-Sheet 3 INVENTOR. idea-2'21 6. 65207242:

ATTORNEYS.

Patented June 24, 1930 UNITED STATES PATENT OFFICE EDWIN S. CARMAN, OF EAST CLEVELAND, OHIO, ASSIGNOR TO THE OSBORN MANU- FACTURING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO MECHANISM FOR SHARING OU'I. MOLDS Application filed January 14, 1927. Serial No. 161,224.

The present improvements relate more particularly to a jolt mechanism for shaking the sand out of mold parts and to the method exemplified in the operation of such mechanism. The sand is necessarily tamped or otherwise rendered compact in a mold before the casting operation and the latter has a tendency more or less to bake or cake the sand so that the dislodgement of the latter from the mold after it has been used is not an easy matter especially when gaggers or spills occur in the sand. Furthermore, such foreign matter requires to be carefully removed if the sand is to be used over again.

The object of the present invention accordingly, as indicated, is to provide a simple and compact mechanism for the purpose stated, whereby the removal of the contents of a mold may be greatly expedited and whereby gagso gers, spills, nails or any other foreign matter in the sand will be simultaneously separated therefrom.

To the accomplishment of the foregoing and related ends, the invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims, the annexed drawings and the following description setting 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 Fig. 1 is a side elevation of one form of my improved mechanism for shaking out molds, the foundation support of-said mechanism being shown in section; Fig. 2 is an end elevation of the same; Fig. 3 is a broken top plan view of the mechanism shown in Figs. 1 and 2; Fig. 4 is a side elevational view similar to that of Fig. 1 but showing a modification in construction; Fig. 5 is an end elevation of still another modified form; and Figs. 6 and 7 are a plan view and side elevation, respectively showing a mechanism of the type in hand in association with means for bringing the mold parts thereto and removing the same therefrom.

The form of the machine illustrated in Fig. 1 includes two similar, vertically disposed jolt mechanisms 1 and 2 that are supported in horizontally spaced relation on a concrete or equivalent solid foundation 3 and are sunk below the floor level so that the tops or reciprocating elements 1 and 2 of said jolt mechanisms project only a short distance above such floor level. The jolt mechanisms are of standard construction and so need not be described in detail, air for their actuation being supplied thereto through pipes 1 and 2" from any suitable source and such supply being controlled so that the mechanisms may be actuated separately or simultaneously as desired.

Bridging the space between the tops 1' and 2 of the two jolt mechanisms is a grating platform 5 which may be either of the assembled construction, as best shown in Fig. 3, or a casting with suitable slots therein. The respective ends of this platform are pivotally attached to heads 6 and 7 that rest on the corresponding tops of the jolt mechanisms, as clearly shown in Fig. 1. As a result, actuation of either or both of said jolt mechanisms will impart a corresponding jolting action to the platform. Preferably movement of the jolt tables 1 and 2 will not be synchronized so that an irregular and variable movement will thus be imparted to the platform in question. Accordingly, the contents of the mold part, e. g. a flask, when the latter is placed upside down on a grating pggtfqlrm, will be quickly and effectively dis- 'I he sand will drop throughthe platform and is guided by plates 8 and 9 on heads 6 and 7, respectively, into a hopper or bin 10 located between the jolt mechanisms, such hopper having downwardly converging walls and being" arranged to discharge its contents into 90 the boot of an elevator 11 by means of which the sand is raised above the -floor level there to be delivered onto a suitable conveying mechanism (not shown).

In place of having both ends of the grating 95 platform pivotally supported on a jolt mechanism, only one such end may be thus suprted, this being the arrangement shown in ig. 4 where theplatform 15, shown with a mold B resting thereon, is pivoted at 100 its right-hand end to a stationary sup-.

port 16, the opposite end slidably resting on the top or reciprocable table 17 of a jolt mechanism 18. The operation of this form of the machine will be substantially the same as that of the one first described, the range of movement of the end of the platform that is jolted being such as to carry such end an equal distance above and below a horizontal plane passing through the pivotal support of the other end so as to minimize the iendency of the mold B to slide off the platorm.

In Fig. 5 the grating platform 20 is shown as wholly supported on a single jolt mechanism 21 and the latter instea of being sup ported on a fixed foundation is carried by means of a truck 22 so that the machine as a whole may be transported, e. g. on rails 23, to wherever it is required for use.

The platform 20 is in effect a box-like structure wherein the grating 20 is inclined to the horizontal, an oppositely inclinin partition 20 serving to direct the sand as it rops from the mold onto such grating. Solid objects in the sand which do not pass'through the grating pass through a space between partition 20 and the latter into a tailings trough 20, while the sand drops directly down around the jolt mechanism and through the frame of the truck 22, which is left open for the purpose, onto the floor.

The form of shaking-out machine illustrated in Figs. 6 and 7 is substantially identical with that shown in Figs. 1 and 2, comprising two similar vertically disposed

jolt mechanisms

25 and 26, upon which is supported a' grating platform 27 The latter differs from platform 5 in the first described construction (that of Figs. 1 and 2) principally in that the bars com osing the grating are transversely instead of longitudinally disposed.

The molds 28 are brought one after the other into position alongside the grating platform 27 by means of a conveyor 29 of any suitable type. Such conveyor is shown diagrammatically only in Figs. 6 and 7 but will preferably include a track 30 along which may be moved a series of plates or trays 31. The molds 28 are placed in inverted position on such trays and when a mold is brought into proper position alongside the shake-out machine, the conveyor is temporarily stopped and a piston 32, operated by means of an air cylinder 33 or equivalent pushing mechanism, is utilized to shove such mold oil the tray onto the grating platform 27. Thereupon the conveyor is operated to bring another mold into similar position ready to be transferred to the shake-out machine. As soon as the shaking out operation is completed, the empt mold is moved in an endwise direction 0 the grating platform onto a gravity roller or equivalent conveyor 35 whereby it is returned to the proper station for use over again. The sand after dropping through the grating platform is received into a discharge chute 36, located below the floor level, by which it is directed onto a conveyor belt 37 or equivalent means, designed to return such sand to storage.

As previously described, the jolting units are designed for actuation by compressed air and the control valves are designed for independent operation. Accordingly, while the cylinders of said jolting units may work in unison with each other, by a simple adjustment of the valves both the time required to make a stroke and the length of the stroke of the respective cylinders may be independently varied in the case of the two units. The resultant action on the grating platform, and thus on a mold supported by the latter, is not only to jolt such mold but also to shake it; that is, the mold is simultaneously thrown up and down and from side to side. The combined effect of these two movements has been found in actual practice to be extremely efficacious in quickly and completely dislodging the contents of the mold (sand and casting) no matter how hard the sand may have been packed.

Other modes of applying the principle of my invention may be em loyed instead of the one explained, change eing made as regards the means and the steps herein disclosed, provided those stated by any of the following claims or their equivalent be employed.

I therefore particularly point out and distinctly claim as my invention v 1. In a device of the character described, the combination of two spaced jolt mechanisms, and a grating platform carried at its ends on reciprocatory elements of said mechanisms, respectively, said platform being adapted to receive a mold in position for shaking the sand therefrom.

2. In a device of the character described, the combination of two spaced jolt mechanisms, and a grating platform pivotally attached at its ends to .reciprocatory elements of said mechanisms, respectively, said platform being adapted to receive a mold in position for shaking the sand therefrom.

3. In a device of the character described, the combination of two spaced jolt mechanisms, means adapted independently to control the operation of said mechanisms, and a grating platform carried at its ends on reciprocatory elements of said mechanism, respectively, said platform being adapted to receive a mold in position for shaking the sand therefrom.

4. In a device of the character described, the combination of two spaced pneumatically operated jolt mechanisms, independent control means for said mechanisms, and a ating platform carried at its ends on reciprocatory elements of said mechanisms, respectively, said platform being ada ted to receive 2r mold in position for shaking t e sand there- V 5. In mechanism of the character described, the combination of two spaced 'olt cylinders, pistons reciprocable in said cylinders, and a grating platform carried at its ends on said pistons, respectively, said platform being adapted to receive a mold in position for shaking the sand therefrom.

6. In mechanism of the character described, the combination of two spaced olt cylinders,

pistons reciprocable in said cylinders, an element loosely mounted on the upper end of each of said pistons, and a platform pivotally attached at its ends to said elements, respectively, said platform being adapted to receive a mold in position for shaking the sand therefrom.

7 In mechanism of the character described, the combination of two spaced jolt cylinders, pistons reci rocable in said cylinders, means adaptedin ependently to control the reciprocation of said pistons, and a grating platform carried at its ends on said pistons, respectively, said platform being adapted to receive a mold in position for shaking the sand therefrom.

8. In mechanism of the character described, the combination of a jolt cylinder, a piston reciprocable in said cylinder, a head mounted on the upper end of said piston for transverse movement with respect to said piston, and a grating platform having its one end pivotally attached to said head, said platform being adapted to receive a mold in position for shaking the sand therefrom.

9. In mechanism of the character described, the combination of a jolt cylinder, a piston reciprocable in said cylinder, a head mounted on the upper end of said piston for transverse movement with respect to said piston, means to limit such transverse movement, and a grating platform having its one end ivotally attached to said head, said platform eing adapted to receive a mold in position for shaking the sand therefrom.

10. In mechanism of the character described, the combination of a jolt cylinder, a piston reciprocable in said cylinder, a head mounted on the upper end of said piston for transverse movement with respect to said pis ton, means on said head and co-operable with said cylinder to limit such transverse movement, and a grating platform having its one end pivotally attached to said head, said platformbeing adapted to receive a mold in position for shaking the sand therefrom.

Signed by me this 3 day of J an., 1927.

EDWIN S. CARMAN.