US3064709A - Foundry flasks reconditioning devices - Google Patents

Description

Nov. 20, 1962 J. s. DEACON 3,064,709

FOUNDRY FLASKS RECONDITIONING DEVICES Filed Jan. 25, 1960 3 Sheets-Sheet 1 HQ \1O Ha I Ha Q L Q Q 23 He 25 FIG] 4 INVENTOR. 24 JAMES S. DEACON ATTORNEY Nov. 20, 1962 3,064,709

J. S. DEACQN FOUNDRY FLASKS RECONDITIONING DEVICES Filed Jan. 25, 1960 3 Sheets-Sheet 2 g 35 X Hb 14 FIG.7

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1 1 14 INVENTOR. 51: JAMES s. DEACON ATTORNEY Nov. 20, 1962 .1. s. DEACON FOUNDRY FLASKS RECONDITIONING DEVICES 3 Sheets-Sheet 3 Filed Jan. 25, 1960 INVENTOR. JAMES S. DEACON ATTORNEY United States Patent 3,064,709 Patented Nov. 20., 1962 Free 3,064,709 FOUNDRY FLASKS RECUNDITIGNING DEVICES James S. Deacon, 946 Oak St., Beloit, Wis. Filed Jan. 25, 196i Ser. No. 4,293 2 Claims. (Cl. 153-32) My invention relates to the reconditioning of foundry flasks, and more particularly to a straightening device for foundry molding flasks which have been distorted by use thereof.

Those familiar with foundry operations and the flasks employed in such operation, are aware that during their use they are subject to much abuse and distortion. The flasks become bent and distorted, so they are out of alignment with one another, and the pins employed for their alignment become bent, and need to be replaced, which is also true of the bushings for the pins which become worn, needing replacement.

A principal object of my invention is to provide an improved device for straightening distorted flasks.

Another object is to provide a device for adjusting the flask pin centers and the centers for the cooperating apertures.

Another object is to provide a structure for supporting the flask when replacing the pins and bushings employed for the alignment of the flasks.

Still another object is to provide an improved flask supporting table and load applying device for straightening distorted foundry flasks.

Other and further objects of my invention will become more apparent as the description proceeds, when taken in conjunction with the drawings, in which-- FIG. 1 is a perspective view of a structure according to the present invention for straightening a foundry flask, such foundry flask being shown in position thereon to correct the distortion thereof;

FIG. 2 is a perspective view of the flask disposed on a surface plate of the structure seen in FIG. 1, showing a jack in position for aligning the flask and adjusting pin centers thereof;

FIG. 3 is a perspective view of pressure applying means adapted for use with the structure of FIGS. 1 and 2;

FIG. 4 is a plan view showing details of structure for holding a distorted flask in position to the structure of FIGS. 1 and 2 for the reconditioning thereof; FIG. 5 is a fragmentary sectional view of a portion of a flask requiring reconditioning and showing the same and being acted upon by the structure according to the present invention;

FIG. 6 is a view similar to FIG. 5, but showing a flask clamped in another fashion for reconditioning; I FIG. 7 is a fragmentary cross sectional view of a flask clamped in position to the structure of FIGS. 1 and 2 for removing an aligning bushing from the flask;

FIG. 8 is an end view of the structure seen in FIGS. 1 and 2;

FIG. 9 is a side elevational view showing a hold down and load applying device for reconditioning a foundry flask, adapted for use with the structure seen in FIG. 1; and

FIG. 10 is an end view thereof.

Referring now to the drawings, the structure according to the present invention is referred to generally by the reference numeral 10 and includes a base assembly 11a supporting a surface plate 11b upon which a molding or foundry flask 12 is supported for reconditioning. The base 11a is fabricated from structural steel sections and includes an I beam section 14 across the front thereof, having a plurality of recessed plates 15 spaced along the top flange thereof. The base 11a also includes vertical legs 110, see also FIG. 8, paired legs 11c and 110 being joined along the upper ends thereof by channel members lid to give good support to the surface plate 11b which is molded thereto.

Plate 11 1a has a plurality of openings 16, see also FIG. 4, which are in direct alignment with the recessed plates 15 on the I beam section 14.

The table or plate 11a has a plurality of machined holes 17:: which are spaced to correspond to the standard spacing of the aligning pins, not shown, provided in the drag of the foundry flask. It is important to check and correct this spacing of the drag pins, otherwise the cope having the openings cooperating with the aligning pins cannot be readily lifted from the drag or placed thereon without jarring the rammed foundry sand.

Such jarring of the sand in either the cope or the drag results in a poor casting, as is known.

A plurality of threaded openings 17 are provided in the plate 11a and these may be arranged in any convenient manner. The threaded openings 17 are for the purpose of supporting threaded rods 18 forming abutments for a clamping bar 19 which clamps the molding flask 12 on to the surface of the plate 11a. The clamping bar 19 has a plurality of apertures 20 for adjustably maintaining the position thereof, the rods 18 extending through the openings 20 in the clamping bar 19 and cooperating with nuts 21 or the like seen in FIGS. 1, 4 and 5, or wing nuts 22 as seen in FIGS. 6 and 7. Whatever form is employed the flask 12 is held firmly to the surface of the plate 11a with the aid of the bar 19. The flask 12 may be placed in any position on the plate 11a, so that any portion of the flask 12 is disposed over one of the openings or apertures 16, for a purpose as will presently appear.

When the flask 12 is placed on the surface plate 11b and held thereto by the clamping bar 19, warping or distortion of the flask 12 can be corrected by applying a load to the side walls of a magnitude to correct such warping or distortion.

Such loads can be applied to the flask 12 by means of a jack unit of a conventional push and pull type, and as seen in FIG. 3, such jack unit consists of a jack portion 23 connected to an hydraulic pressure generating means or ram 24 as by means of flexible hoses 25. The ram 24 may be attached in any convenient manner to the base 11a as seen in FIG. 1, or it can be operated as a portable unit. When the jack 23 is placed in position as shown in FIGS. 1, 5, 6 and 7, with the bottom part there of resting in a recess 15, a piston 26 of the jack 23 will extend upward through the opening 16 in the plate 11a. A lever 27 at the ram 24 is manually operated to force the piston 26 against the bottom of the flask 12 and straighten the same.

Referring now to FIG. 6, there is shown structure for clamping the flask 12 to the plate 11b. Such modified structure consists of a hook member 28 slidably disposed on the rod 18, and held in engagement with flask 12 by means of the nut member 22.

As seen in FIGS. 5 and 6, the clamping bar 19 or the hold down hook member 28 is out of the plane of the jack unit 23 so that the straightening effort can be applied properly to the bottom of the flask.

As seen in FIG. 2, the flask 12 can be squared by the jack 23, it having hooks 29 and 30 at each end thereof, one such hook 29 being mounted on the cylinder and the other hook 319 being mounted on the piston 26 of jack 23.

Such squaring of the flask 12 as seen in FIG. 2 may be indicated for adjusting the pin centers lining a pair of flask elements positioned respectively, for example, as a cope and drag.

Structure according to the present invention may also be used to remove pins or bushings from the flask 12,

such pins and bushings serving to align cope and drag. In FIG. 7 there. is shown the structure employed to remove a bushing 32, the piston 26 of the jack unit 23 having a shouldered section 34 contacting the bushing 32. The piston 26 of the jack 2.3 bears against a push rod 33 passing through an aperture or opening 35 in a lower flange 31 of the flask 12.

Referring now to FIGS. 9 and 10 of the drawings, there is shown an embodiment of theinvention wherein the flask 12 can be readily locked in position on the surface plate 11b for the application by the jack 23 of a straightening load.

Each of the channel members 11d has a bracket 31 extending fromeach end thereof, each bracket 31 having a stifiener leg 32 extending therefrom to the vertical leg 11c, the bracket members 31 and 32 being welded respectively to the channel members 11d and the legs 110. The brackets 31 are joined by a tubular member 33 having a sleeve 34 supported thereon. One of the sleeves 34 has a vertical member 36 extending upward therefrom, and the other sleeve 34 has a vertical member 37 extending upward therefrom. A yoke 38 consisting of two side-by-side' members 39 and 41 is riveted at 42 to the vertical member 36, while the other end of the yoke 38 is connectedby a pin 43 to the vertical member 37.

A pair of spacer members 44 and 46 provide a guide in the yoke member 38 for a vertically adjustable load receiving link 47 guided between the two arms 39 and 41 and between the spacer members 44 and 46. The position of the link 47 with respect to the yoke 38 is adjusted by spacer holes 48 therein, and a pair of aligned holes 49in the members 39 and 41, there being a pin 51 passing through the alignedholes 48, 49 for maintaining the adjustment ofthe link 47 with respect to the yoke 38.

The lower end of the link 47 is connected to a swivel coupling 52, it being connected to coupling 52 having a clevis 53 extending downward therefrom, and'being pivotallyconnected by a pin 54 to a loadreceiving arbor or hold downmember 56.

The hold down member 56 can be lowered in position against the flask 12 and swiveled toany wanted position on the top thereof in a fashion corresponding to the bar 19. as seen in FIG. 1', the pin 51 being first moved from the aligned holes 48 and 49 and thereafter being inserted in position intothe proper holes.

Structure is provided for-locking the hold down memher-56 into position against the flask 12, and to this end an operating lever 57 is pivotally connected at a clevis 58 thereof to the pin 43 extending through the members 39'and 41 as seen in FIG. 10. The upper end of the vertical member 37 has a pin 59 extending therethrough which moves into engagement with the arms 39 and 41 when the lever 57 is moved in a counterclockwise direction as seen in FIG. 9 to lock the hold down member 56 in position against the flask 12.

, It may be noted thatthe vertical plane passing through 4 the hold down member 56 should be spaced from the axis of the plunger 36 of the jack unit 23 so that upon application of hydraulic pressure to the jack 23 a straightening force can be applied to the flask 12.

It should be also noted that the arms 36 and 37 are movable on their sleeves 34 along the members 33 so that the hold down member can be applied to the flask top as desired. By-reason of the swivel coupling 52, hold down member 56 can be located on the flask diagonally.

It is thus possible to straighten the flask as desired by the proper selection of location of hold down member 56 and jack 23.

From the, above description taken in conjunction with the various figures in the drawings, it will become evident that the device according to my invention enables a flask to be reconditioned, that is, straightened to rest in a plane, squared up properly having its pins or bushings replaced.

Although I have shown some specific structures and arrangement of parts with variations, I am fully cognizant of. the fact that the, parts may vary in shape, form and contour without eflecting their; operativeness, and I- I6:- serve the right to make such changes as I may: deem necessary or expedient, without departing from the-spirit of my invention as defined by the claims.

Having thus described; my invention, What-l1 claim and desire-to secure by Letters: Patentin the United States, is:

1. In a device of the character described for recon ditioning a foundry'flask', abase, asupport plate-mounted on said base and adapted to support said foundry flask, means for holding said flaskto said support plate comprising a. hold'down member spanning and engaging the upper edges of said flask, apair of armsextending along side said support plate and includingmeans providing a pivotal connection of said arms to said base, a yoke rigidly connected at one end to the upper end of one of said arms and pivotally-connected at its other endtothe upper end of the other arm, means supported by said yoke and providing a vertically adjustable and a horizontal swivel connection between said yoke andsaid hold down member, releasable locking means for said yoke at the pivotal connection thereof to the other arm, a plurality of openings in said plate, said flask being adapted to have wall portions thereof overlying said openings, and means acting between said base and said flask for imposing a load against said flask to straighten the same while said hold down member is in-position engaging the upper edges of said flask.

2. The invention as defined in claim 1 wherein the means providing the pivotal connection of said arms to said base also provides for adjustable positioning of said arms in different vertical planes.

References Cited in the file of this patent UNITED STATES. PATENTS Bremer; May 3, I949

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