US1018669A - Molding apparatus. - Google Patents

Description

F. X. LEUTHNER & F. TIGKNER. 1^. J. LBUTHNBR, lzxBoUTon. AND M. L. TAYLOR, ExEoUT'maLw r. x. LEUTHNBR, nnc'n.

Y MOLDING APPARATUS. l APPLIOATION FILED MAL 2, 1910. BENEWED JAN. 11, 1912. Lm

Patented. Feb. 27, 1912.

2 SHEETS-SHEET Z nutren s'rargsrgggnn'r ormoni.

FRANK X. LEUTHNER, OF BUFFALO, NEW YORK, AND FRANK TICKNER, OF SHARPS- VILLE, PENNSYLVANIA; FRANK J. ,LEUTHNER EXECUTOR AND MINNIE LE'UTI-INER TAYLOR EXECUTRIX OF SAID FRANK X. LEUTHNER, DECEASED.

MOLDING APPARATUS.

Specification or'l Letters Patent,

Patented Feb. 27, 1912 Application filed 'March 2, 1910, Serial No. 546,821. Renewed January 11, 1912. Serial No. 670,725. I

To all whom it may concern:

Be it known that we, FRANK X. LEUTH- NER and FRANK TICKNER, citizens of the United States, residing at Buffalo, in the county of Erie and State of New York, and Sharpsville, in the county of Mercer and State of Pennsylvania, respectively, have i'nvented new and useful .Improvements in Molding Apparatus, of which the following is a specification.

This invention relates to a molding apparatus for making tubular castings, such as ingot molds, and more particularly to an apparatus of this charactet which comprises a collapsible core-barrel such as shown in Letters Patent of the United States No. 868,607, dated October l5, 1907.

In the apparatus shown and described in the above mentioned patent it is necessary to employ a plurality of extracting or ejecting devices for removing the core-barrels of different sizes of molds from the castings and flask, which ejecting devices are provided with heads, centers or posts to suit the different; sizes of collapsible cores with which the same engages for ejecting the core-barrel from the flask and casting and limit the upward movement of the side plates on the core body during this operation. v

One of the objects of this invention is to s0 construct the collapsible core-barrel that the upward movement of the plates on the core-body or column is limited by means arranged directly on these parts, thereby permitting of using the same extracting de.- vice on all of the molds regardless of their size and effecting a corresponding reduction in the cost of the equipment,

In the collapsible core-barrel of the patent referred to the side plates were surrounded by bands which confined these plates on the eore-body While the facing of sand was 4applied to the outer side of the same and the metal was poured into the mold containing this core. Owing to the looseness of these bands it has been necessary for one or more men to stand by dur.

- wise of the core-body or column the required extent to permit the collapsible corebarrcl to be disengaged from the casting, thereby avoiding the necessity of employing any one to prevent dismemberment of the collapsible core-barrel during the stripping operation and also avoiding the loss of time heretofore involved infreassembling the collapsible core-barrel wjlien the parts became dismembered.

A further lobject o'f the invention is to improve the device of our patent by providing holding l,connections for the core lmembers or plates which are. internal of the structure.

In the accompanying drawings consisting of 2 sheets: Figure l is a vertical section of our improved collapsible core-barrel as- `soci-ated with the flask of a mold and the means for extractJing or ejecting the corebarrel from the casting. Fig. 2 is a top plan view of the core-barrel. Fig. Slis a bottom plan View thereof. Fig. et is a side elevation of the same. Fig. 5 is -a detached vertical section of the collapsible core-barrel. ,Fig

6 is a horizontal section in line 6-6, Fig. 5. l

Similar letters of reference indicate corresponding parts throughout the several views.

vIn its general organization the collapsible core-barrel of this molding apparatus resembles that shovvn in Letters Patent of the United States No. 868,607, which has been previously referred to and comprises a tubular core-body A which tapers /upwardly from the bottom to the top thereof and is preferably made of cast metal and of reetangular form in cross section although not necessarily so. At its bottom said body has an outwardly projecting Harige a.

B, B represent the side plates of the corebarrel which/ are arranged around the body A thereof and normally rest at their lower Surfaces of the body near the corners thereof. The several side platesare provided with openings c in which the outer coating C of the molding sand of the core can anchor itself and .which also form vent passages through which the moist air can es` cape in drying the molding sand as well as the gases which are generated during the operation of casting.

The several side plates are coupled with the body by means which permit the same to move laterally toward and from the side of the body aswell as lengthwise thereof when erecting the core or when ejecting the same from the casting but which prevent the side plates from becoming disconnected from each other or from the core-body. The preferred means'for this purposelwhich are shown in the drawings comprise a plurality of holding connections shown as consisting of horizon'tal coupling bolts or tie rods D each of which passes transversely through a pair of corresponding longitudinal slots e, e formed in opposite sides of the corebody and through alined openings f formed in the side plates which are arranged on opposite sides of the core-body. One end of the bolt is preferably provided with a head (Z which bears against the outer side of one side plate and the other end of this boltis Y provided with a cotter pin or key g which engages with the outer side of the other side plate. At the outer ends of the openings the Side plates are provided with recesses L which receive the head and pin of the respective coupling bolt so that the Aopposite ends of the bolt are tlush with the outer surfaces of the side plates and are not liable to interfere with obstructions when handling the same would be the case it' the coupling bolts projected at their opposite ends beyond the outer surfaces of the side plates.

Although the number of bolts which are ern loyed for tying together the core-body an each pair of side plates on opposite sides of the same may be varied, itl'ias been found'that two of such bolts, as shown in the drawings, arc suitable for this purpose. ln order to permit the coupling bolts or tie rods of one pair of plates to clear those 'of the other pair of plates, these coupling bolts are arranged vertically out of line with each other, a'S shown in Figs. 1 and 5.

Although the upward movement of the side plates on the core-body may be limited by engagement of the coupling bolts with the upper ends of the slots, it is preferable to employ for this purpose a stop device for each side plate which is independent of such coupling bolts and which arrests the upward movement of each side plate relatively to the body independently of the other side plates. The preferred means for this purpose`comprise an integral stop lug z' projecting inwardly from the upper part of each side plate andl provided with an upwardly-facing stop surface or shoulder and a plurality of integral stop lugs y' projecting outwardly from the upper part of the body above the stop lugs of the side plates and each provided on its underside with a downwardly facing stop surface or shoulder which is adapted to be engaged by the stop face on the adjacentside plate.

In the completed condition of the corebarrel,-the side plates are spread and lowered, so that their lower ends rest upon the flange a, as shown in Figs. l and 5, and the outer sides of the side plates and the margin of the llange a are coated with a. layer ot' molding sand C. lVhen thus prepared the core is placed upon a bottom plate or drag K and surrounding it is placed the flask L which rests on the drag and has an inner layer or lining Z of sand which is separated from the sand surface of the core by anV intervening annular space or mold cavity M, as shown in Fig. 1.

After the molten metal is poured into the mold cavity the flask is raised together with the casting and the core is ejected downwardly therefrom by an extracting or ejecting device which is preferably constructed substantially like that shown in t-he Letters Patent heretofore referred to. Said extractor comprises a head, center or post N which is adapted to bear against the upper end of the neck n at the top of the core body, two horizontally disposed levers 0, o pivoted at their upper inner ends to opposite sides of the head, two upper chains y), 7) connected at their lower ends with the outer ends of said levers while their upper ends are connected with a ring l) which is adapted tobe connected with a crane or other suitable lifting device, and two lower chains r1, q connected at their upper ends with said leversI between their inner and outer ends and provided at their lower ends-with hooks Q, Q, which are adapted to engage with an outupper edge of the flask.

Upon app-lying a lifting force to the ring l. the levers o, o are caused to be turned in such a direction that the head N is pressed g downwardly against the neck of the corel body while the hooks are pulled upwardly,

wardly extending horizontal flange R at the clined ribs along the correspondingly shaped .column instead of to each other.

umn may be of different lengths, and maysurfaces of the tapering body. Inasmuch as the side plates in their normal position do not enga ge each other at their upright longitudinal edges they are permitted, when raised, to move inwardly sol that they and the sand covering of the core-barrel are no longer internally supported and may collapse andy thereby become separated from the inner surface of the casting. Then the side plates have been raised so that theirV vstop lugs engage with the undersides ot' the stop lugs y' on the outer side of the core body,-the continued upward movement of the flask causes said plates andthe sand covering thereof to be disengaged from said casting. While the plates are thus raised relatively to the core-body the coupling bolts Dsl'ide vertically in the slots c ot' the corebody and as the plates contract or move toward each other on the upper part of the core body, as shown by dotted lines in Fig. 5, thesame slide horizontally upon the coupling bolts.

As the core-body and side plates are ejected from the flask and casting the corebody and side plates are held by the coupling bolts D in their assembled condition without necessitating any hands for this purpose, thereby reducing the cost of labor and facilitating the preparation ofa core for the next mold. l

The advantages of our invention will .be apparent to those skilled in the art.

The objection to the loose bands of ourl prior patent is entirely overcome, and the holding connections for the core members or plates are internal. Theplates form a permanent pai-tof the core and are not loose so that they fall off as in our prior device. The upward stripping of the vmold and casting causes At-he .relative endwise movement of the core members o-r plates and the column' or core body, Whichgives the contraction for collapse, thus allowing quick and easy stripping. 'Y l The holding connections Jfor the core members or plates may be varied widely. For instance, these connections may extend to the The colbe varied widely in shape, length and size.

The core Inembers lnay be arranged to eX- pand and contract without longitudinal movement, except that bet-Ween the core members and the column. The longitudi- --nal openings between the core members may beat Ifour corners or at two opposite corners, or may be intermediate of the corners, the core may be formed of two plates or core members, or more, and many other changes may be made in the form and arrangement of the parts without departing from our invention.

lV e claim as our invention:

l. A collapsible core having longitudinal core members shaped to form an angular structure, said members have adjacent edges separated by longitudinally open spaces, and connections ior said core members,'eX tending within the structure and holding the members expanded, said connections be ing arranged to allow collapse of the mein bers on lifting the tlask and contained cast ing, substantially as described. I

2. lIn a collapsible core, a column having a tapering portion, core members surrounding. the column and forming a structure of angular cross section, said core members having some or their adjacent edges separated by longitudinally open spaces arranged to receive coating material, and holding connections for the core members extending within the structure and arranged to hold the members expanded, said connections being arranged to allow collapse of the members on endwise movement of the flask and casting relati ve to the core, substantially as described.

3. A. collapsible core having core mem* vbers shaped to form an upwardly tapering structure ot angular cross-section, said 1nembersV having adjacent edges separated by longitudinally open spaces arranged to receive the coating material, holding connections tor said members to permit expansion and contraction thereof, said holding mem.- bers being internal of the structure, and a column having a tapered portion arranged for movement relative to the members, said column operating by sliding contact to eX- pand or contract the core members; substantially as described.`

4. A collapsible core having core members with at least some of t-hei` adjacent edges separated by longitudinally open spaces to receive coating material, a central column having a tapering portion arranged to `bear directly upon vportions of the core members to hold them expanded, and holding connections for the core members arranged internally of thc structure, said connections being arranged to allow contraction of the core members on lifting of thc flask and hol low casting therefrom, substantially as described.

5. A collapsible core having core members smv... .,...i

connect-ions for the core members internal of the structure and arranged to allow contraction of said members on lifting of the flask and hollow casting therefrom, substantially as described.

6. A core-barrel comprising a body .having longitudinal slots, a plurality 'of plates surrounding said body and provided with openings in line with the slots of the. body, and coupling bolts each extending transversely through the corresponding slots of the body and the openings of the plates on opposite sides thereof and having inwardly facing shoulders outside of said plates.

7. A core-barrel comprising a body having longitudinal slots, a plurality of plates surrounding said body and provided with openings in line with said slots and recesses at the outer ends of said openings, and a plu rality of coupling bolts each of which extends transversely through the corresponding slots of the body and the openings of the plates on opposite sides of the same and having a head at one end whichis arranged in one of said recesses and a cotter pin at its opposite end arranged in the, opposite recess.

8. A collapsiblecore having core members shaped to form an endwise tapering struc ture of angular cross-section and having adjacent edges separated by longitudinally open spaces to receive coating material, internal connections for said members arranged interior of the structure and allowing expansion and contraction of the members, and a central column having a tapering ,portion arranged to provide expansion and contraction by relative endwise movement of the column and members, said column having a head portion arranged to project above the top of the moldgsubstantially as described. i

9. A collapsible core having a central column, with a tapering portion and an upwardly projecting head portion, and.core members inelosing the column and provided with connections internal of the structure to hold them in place, the column being arranged to expand and hold the core members expanded, and the connections being arranged to allow collapse of the core members on lifting the flask and hollow casting therefrom, substantially as described.

10. A collapsible core having surrounding core members shaped to form a structure ot angular cross section having open longitudinal core spaces to receive coating material, a central column havinga tapered p0r.

tion and a top head portion to project abovethe casting, and internal .holding connections tor the core members engaging the column and arranged to allow collapse of the core members on lifting of the flask and hollow casting therefrom, substantially as described.

ll. A collapsible core having core members -shaped to term an endwise tapering structure et angular cross-section, said members having adjacent edges separated by longitudinally open spaces arranged to receive coating material, a central column arranged for relative longitudinal movement between it and the core members, and stops arranged to limit this relative endwise movement; substantially as described.

l2. A collapsible core having inclosing core members forming a structure of angular cross sectionwith open longitudinal corner spaces to receive coating material, a cen tral column having a tapered portion a-nd l an upwardly projecting head to receivethe ejector, and internal mechanism arranged'to couple the column and core members together and allow for expansion of the column while permitting collapse of the cor. members on lifting otl the flask and hollow casting therefrom, substantially as described.

13. A collapsible core having a central column with a tapering portion and a head portion arranged to be engaged by an extractor, and core members inclosing the column and provided with connections internal of the structure to hold them in place, the column being arranged to expand and hold the core members expanded, and the conne-etions being arranged to allow automatic collapse of the core members when the flask isV lifted by an extractor bearing on the column, substantially as described.

14. A collapsible core having co-re meinbers surrounding a central column, said column being arranged to expand and hold the core members expanded, the core having longitudin-fllyvpen spaces to receive the coating material, and holding connections for the core members. internal of the structure and arranged to allow automatic contraction of said members on lifting of the flask by an extractor engaging the column, su stantially as described.

itness our hands the 23rd and 25th days of February, 1910. l FRANK X. LEUTHNER.

FRANK TCKNER. lVitnesses to the signature of Frank X. Leuthner:

ALFONSO SERIO,

JOHN J. CUNNINGHAM. l Witnesses to the signature of Frank Tickner:

M. J. McDowELL,

HUGH J. GARVEY.

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