US2234528A - Rotatable ingot mold - Google Patents

Description

March 11, 1941. JUNG ROTATABLE INGOT MOLD Filed Jul 8, 1939 s Sheets-Sheet 1 album/ ALBE' March 11, 1941. JUNG 2,234,528

ROTATABLE INGOT MOLD Filed July 8, 1939 3 Shuts-Sheet 2 Qubzsm' H YUM V A iiir vfla fh) m March 11, 1941. A. H. JUNG ROTATABLE meow MOLD V Filed July 8, 1939 I 3 Sheets-Sheet 5 Patented Mar. 11, 1941 PATENT OFFICE 2,234,528 I noTATABL meo'r MOLD Albert II. Jung, Flushing, N. Y., assignor to United American Metals Corporation, a corporation of New York Brooklym N. Y.,

Application July 8, 1939, Serial No. 283,484

' 9 Claims.

This invention relates to molding apparatus and more particularly to fluid cooled dumping molds.

Prior to the. instant invention it has been customary to provide fluid cooled molds which were relatively diflicult and expensive to manufacture and generally unsatisfactory with regard to operation because of inefiicient fluid connections, bearings, and fluid distribution.

These. prior molds have been of suchconfiguration that their manufacture by castingor by other relatively inexpensive methods of fabrication have not been feasible. Further, the designs of prior molds have involved suchpaths of thermal exchange fluid flow as to contain inoperative or substantially inoperative portions wherein stagnation of the thermal medium may take place with corresponding inefficiency of the device.

In" prior. constructions involving rotating dumping molds, little attention has been paid to apparatus for conducting thermal exchange fluid from a stationary conduit to the rotary molds. The use of flexible conduits has been contemplated but such construction have not been found to be satisfactory as theyare continually in the operator's way and make for inefficiency in operation.

Prior rotating dumping molds have not incorporated in their construction satisfactory yet in-.

expensive ingot receiving means which occupies substantially no room when not in use and acts to protect the floor upon which the mold stands and to guide the dumped ingots in an orderly and regular manner when in'u'se 'as taughtby the instant invention. 1

It is an object of the instant invention to provide a novel fluid cooled dumping mold of such configuration as to simultaneously lend itself to ready fabrication and provide for relatively effi-' cient thermal heat exchange.

It is another object of the instant invention to provide a novel double-sided fluidcooled dumping mold involving a combined swivel connection and bearing.

It is a,still further object of the instant in vention to provide a twin set of double sided fluid cooled rotating dumping molds including a novel dumped ingot receiving means. 1

Other objects and the nature and advantages of the invention will be apparent fromthe fol-v lowing description taken in conjunction with the accompanying drawings, wherein:

Fig. '1 is aview in perspective-of a double-' sided twin set of rotating dumping molds in accordance with the invention;

Fig. 2 is a fragmentary detail vertical sectional view of one form of combined swivel-pipe connection and bearing incorporated in the dumping-mold illustrated in Fig. 1;

Fig. 3 is a horizontal sectional view taken on line 3'3 of Fig. l and looking in the direction of the arrows;

Fig. 4 is a vertical section of a single mold section taken along line 4-4 of Fig. 3 and looking in the direction of the arrows; I

Fig. 5 is a view similar to Fig. 2 but of a modified form of combined swivel pipe connection and bearings;

Fig. 6 is a fragmentary view in perspective of a thermal fluid distributor;

Fig. '7 is a front elevational view of a dumping mold incorporating telescopic dumped ingot receiving means; and, L z

Fig. 8 is an end elevation of the mold illustrated in Fig. 7 but with the telescopic dumped ingot receiving means in the in position.

Referring to the drawings, 'a framework It] may generally comprise a series of pipes l I joinedtural steel l5 extend across the upper front and rear portions of the apparatus and involve the dual function of supporting the swivel connector bearings Ilia, I61), I andllid -see Figs. 1 and 3, and engaging the stops I! mounted on the front end of the rotatable molds l8 and Na respectively. The T-section lengths l5 are secured to the upstanding pipe members I3 by the threaded caps 20" which engage corresponding threaded upper portions of the pipes l3 extending through the T section lengths VI 5. Mounted substantially centrally of the stops I! are the handles 2| whereby the operator may rotate the molds 18 as desired .in accordance with casting activity. A

The combined conduit swivel andbearing Ilia may be connected to a conduit 22 leading from a source, not shown, of cooling fluid such as coolingwater. Associated with'the cooling fluid en trance inside of the mold W1 and the discharge side of the swivel connector Ilia. is the distributor 23, illustrated in detail in. Fig. 6 and comprising a pipe-like element closed at its end 24 but pierced as at 25 aswell as through the cylindrical surface in section as best illustrated in Fig." 4.

nation thereof.

After the cooling fluid, such as cooling water, has passed through the channels 28 of the mold Ila to effectively cool the cavities 28 and 22a, it is discharged through the opening 28 associated with the swivel connections lib from whence it is led through connecting pipe 8|, which may simply comprise a rubber hose strapped to fittings 22 and 82 by clamps ll, see Fig. 1, to the swivelbe'aring l8c which may be similar to lie and include a distributing member 230 which serves to distribute the heat absorbing fluid through the channels 25 in mold l8 in-a manner similar to the distributionthrough the channels 28 in mold I 8a. a

After the cooling medium is passed through the channels 85 it is collected in the far end oi the mold I8 and discharged through the opening 86 which is associated with the swivel connector ljd which is connected to a pipe 31 which in turn may be connected with the sewer or other suitable vessel or tank, not shown.

The mold cavities 29, 29a of the mold I 80 may be similar and of generally trapezoidal section. The fluid passage 28 maybe generally hexagonal The cavities 29 and 2911 may have a common bottom wall 88 of a thickness generally corresponding to that of the side walls of the cavities which are sloped as shown to provide draft which is essential to the casting of the ingots in the mold cavities and is also so shaped, in accordance with the invention, to provide draft for the casting of the mold itself. The mold I8 is adapted to be cast in a two part mold including destructable cores which serve to form the passages or channels 28.

V is, the passage 28, with the interior 59 of the element 56 and is threaded to the mold I 8 and the element 56.

The combined swivel fluid connector and mold These destructable cores are adapted to be removed through openings with which the swivel connections are associated and the openings 39 which may be subsequently tapped and plugged by plugs 40, see Fig.1, upon completion of the mold casting.

To provide for the ingress and egress of heat exchange fluid to the rotating mold a swivel joint such as illustrated in Fig. 2 may be utilized. The stationary pipe 22 may pass through a notch ll in the horizontal portion 42 of the T section lengths l5 and be associated with the angular connector. 42 which in turn is threaded to stationary pipe section II provided with an annular ring 45 adapted to be engaged on both sides by packing 42 which also may be in the form of rings. The gland 41 may be formed integral with the mold I and be capped by the packing screw plug 48 in threaded engagement I with the interior of the wall 42 of the gland 41. A nut 58 may .be utilized in-threaded engagement with the exterior of the threaded portion of the cap and the end of the walls 42 of the gland II. It is to'be borne in mind that the mold l8a is adapted to be rotated about the stationary pipe section 44 and'that the angular ring 45 formed integral therewith serves-to prevent the leakage of fluid transferred between the interior of the pipe section 44 and the passage 28, the ring 45 cooperating with the packing l8 in'additionto the cooperation of the packing with the generally cylindrical exterior ii of the pipelikeelement 44.

76 A modified form of swivel bearing bearings illustrated in Figs. 5 and 6 are not only adapted to serve as passages for the thermal exchange fluid between the pipe exterior of the mold and the, molds interior, but they serve as, supporting bearingsfor the rotating molds. Accordingly, the elements lea,- liib, I60 and lGd are designed to be stress transmitting and to prevent leakage otherwise present because bearing stress tends to aggravate leakage tendencies due solely to fluid pressure in swivel joints. In accordance with the invention, leakage is prevented by the provision of an annular ring and the association and cooperation of packing with the sides of said rings in addition to the usual cooperation of said packing with the cylindrical exterior wall of the pipe section within the packing rings. In the embodiment illustrated in Fig. 5, the ring 45 is stationary. In the embodiment illustrated in 'Fig. 6, the ring 51 is rotatable and in addition it forms an inlet passage. This latter construction is adapted to be used in connection with molds which are specially cast to receive a swivel connection such as illustrated in Fig. 5. A

As has, been explained in detail above, the molds in accordance with the invention are generally superior to previous molds for they may be readily fabricated as by casting and permitting the flow thereth rough of heat transfer without the use of movable flexible pipes. Further, special distributors are provided to'insure substantially uniform distribution of the thermal exchange fluid through the interior of the heating exchange passages within the interior of the mold thereby preventing a stagna tion and delay of solidification of ingots cast within the cavities of the molds.

In operation, the mold l8 after being fllled may be rotated by grasping the handle 2| which may comprise a revoluble insulated part and imparting thereto an oscillatory motion, thereby effecting dumping of ingots solidified within one side of the mold. By this time, the mold Ila may be fllled and ready for dumping and the handle of that mold is oscillated, effecting the emptying of one side of ,that mold. While the mold I8a is being dumped the second side of the mold [8 may be filled and when the filling operation of \that mold is-completed the second sideof the mold l8a' may be filled with molten metal to be cast into ingots. By the time the second side of the mold l8bjis filled the mold Ila is again ready for'dumping and the cycle described repeated.

The above method of operation is relatively efiicient with regard to the utilization of the time of a single operator working on a "doublesided twin mold such as illustrated in Fig. 1 f

mitting rapid substantially continuous'castingmay be efi'ected.

Referring to Figs. '7 and'8, the water cooled dumping mold illustrated in Fig. 1 is here again depicted but includes, in addition to what is shown in Fig. 1, a telescopic cradle whereby freshly cast ingots may be rapidly dumped withbut fear of breakage and with assurance that they will be guided regularly and orderly to an exposed platform from which they may be readily picked up for subsequent association with a line type casting machine or for loading elseportions of the T irons 15 by the nuts II and 12" respectively. Bent in angular fashion over the rod are a pair of stationary conveyor straps I3 and 14 having lower leg portions and 16 which are bent over and secured to the frame members H by any suitable means as by spot welding. The conveyor straps l3 and 14 may also be secured tothe rods 10 by any suitable means such as by spot welding. v

The lower portions 15 and 16 of the conveyor straps have circular openings 11 therethroughl, see Fi l, which are adapted to receive the ends of a pair of hollow cylinders 18 withinwhich the cradle 19 is adapted to cooperate in telescopic fashion. The ends of the hollow cylinder 18 are threaded to receive the nuts 88 on one side of the depending portions 15 and, and the guide cap 8| on the other side of the depending portions 15 and 16 whereby the hollow cylinders. 18 will be securely held in place.

Each cradle 19 may generally comprise a pair of longitudinal pipe sections 82 capped at its inner end 83 to prevent entirely pulling out of the cradle from the hollow cylinder 18 and joined at its opposite end by the connections 83 which cooperate with upstanding pipe or rod pieces 84 which act as stops. The connectors 83' also cooperate with relative short depending legs 85 whichmay be capped at their bottoms 86 in order to effect a relatively great floor contact area. The diameter of the longitudinal pieces 82 is less than the diameter of the openings 81 within guidelcaps 8| and the internal diameter of the hollow cylinders 18 whereby when the cradle 19 is pulled to its outward position as illustrated in the right hand portion of. Fig. '7 and when the relatively short legs 85 are permitted to rest on the floor, the generalplane of the cradle will be as indicated by the dot-dash line 88 which 'is angularly disposed from, and

lower than, the truehorizontal as indicated by the dot-dash line 89 which isparallel to the floor. When both cradles 19 are in the innermost position as illustrated, in the left hand portion of Fig. 7, the entire mold may be wheeled about on the roller mountings [4 without interference.

It is to be noted that in accordance with the f invention, the rotatable axes of the dumping mold sections I8 and l8a are off center with their relatively short respective outside portions adapted to be oscillated downwardly. This construction permits of a relatively steep angular disposition of the strap conveyors 13 and 14 without interference with the, oscillation or rotation of the mold sections and yet permits of a relatively large number of mold cavities.

In operation, upon rotation or oscillation of the mold section l8a, the freshly cast ingots are dumped in inverted position upon the strap conveyors l3 and 14- as illustrated by the ingot 98 which slides down the relatively steep strap conveyor 13 until it reaches the depending portions I5 and 16. The ingot 90 thereupon is again inverted to its normal cast position as shown by the ingot 9| resting on the longitudinal members 82 of the cradle 19 which are spaced apart by the hollow cylindrical member 18 and the rod or pipe end member 92 which is oscillated with the connectors 83.

It will be apparent from the above description that relatively eccentric disposition of the mold sections cooperates with the relatively steep conveyor straps l3 and 14 to efiect an efficient dumping and conveying equipment and further that the conveyor straps l3 and I4 involve an additional function of supporting hollow cylindrical members 18 which act as a base for and cooperate telescopically with a pair of cradles 79 which are adapted to be extended in operative position resting upon the floor to insure restricted collection and stacking of freshlycast ingots and when in innermost position are lifted off the floor permitting ready portability of the entire mold assembly .upon the roller inembers l4.

It will be obvious to those skilled in the art that various changes may be made in this device Without departing from the spirit of the invention and therefore the invention is not limited to what is shown in the drawings and described in the specification but only as indicated in the appended claims.

- What is claimed is:

l. A double-sided rotatable fluid cooled mold comprising a mold section formed with a plurality of cavities on its top and bottom sides and provided with interspersed heat exchange fluid medium passages. therethrough, said passages directly cooperating with the' side walls of said cavities to remove heat therefrom, a set of single walls being common to thelbottoms of the cavities in the top side and the bottom side of said mold section, the cavities being generally trapezoidal in cross-section, the fluid passages being generally hexagonal in cross-section, a

combined swivel fluid connector and'bearing as-' sociated with said mold section, said combined element involving an annular ring packed on both sides, a handle for said mold section, a stop formed integral with saidmold section whereby oscillatory motion of the mold section is limited, said handle associated substantially centrally of said stop whereby association of the handle with the rotatable mold section. is effected, a fluid medium distributor associated With the interior of said mold section, said distributor haivng dis- 2. Structure recited in claim 1, said mold section being moimtedon a longitudinal axis located closer to one side of the section than to'the other, whereby the short side may be rotated or oscillated in a downward direction with but relatively small clearance therebelow, said frame supporting said mold section in elevated position, a pair of metal straps secured to said frame on an incline below said mold section to receive and convey freshly cast and dumped ingots.

5. A double-sided rotatable mold comprising a mold section formed with a plurality of cavities on its top and bottom sides, a frame for supporting said mold section, said mold section being rotatably mounted in said frame along a longitudinal axis spaced closer to one side of said section than the other, a conveyor having an inclined section for said mold section secured to said frame in operative position below said mold section, said conveyor comprising a pair of metalstraps arranged in angular. configuration to effect a slope, the inclined portion of said conveyor being arranged relatively close to the locus of the short side of the rotatable mold section.

6. The structure recited in claim 5 and a telescopic cradle cooperating with said frame, said' cradle having horizontal portions spaced from the lower portions of the frame which are adapted to rest upon the floor, said cradle having legs which are shorter than the distance from the floor to the horizontal portions thereof whereby when said telescopic cradle is in its innermost position the legs thereof do not touch the floor, said frame-being mounted on wheels, the relation between the cradle and the frame being such that when the cradle is in its outermost position the horizontal portions thereof may be inclined and the legs thereof touch the floor, whereby freshly cast and dumped ingots may be conveyed in regular and orderly fashion to the cradle when the same is in its outermost position, and when the .mold is not in use or its location is desired to be. changed the cradle may be moved to its innermost position raising its legs off the floor and the mold pushed about on its wheels.

'I. An integral double-sided fluid cooled mold adapted to be rotated or oscillated for dumpdirectly cooperating with the side walls of said trapezoidal in cross section and of a height-generally corresponding to the height of said mold,

ing comprisinga unitary casting having a plu rality of cavities in its top and bottom sides and provided with interspersed heat exchange fluid medium passages therethrough, said passages cavities to removeheat therefrom, a set of sin-- gle walls being common to the bottoms of the cavities in the top side and the bottom side of each mold section, the cavities being generally the fluid passages being generally hexagonal in cross section, a plurality of plugged openings in the exterior side walls of said mold, whereby the same is adapted to be fabricated by casting in a two-part mold with destructible cores which may be removed through the openings in the side walls thereof, the trapezoidal section of said cavities providing draft for the casting of said mold as well as draft for the casting of ingots in'said 2 cavities. L

8. A mold comprising a rotatable dumping mold section, a frame for supporting said section,

' a conveyor mounted therebeneath, a telescopic.

cradle associated with said frame and cooperat- 2 ing with said conveyor when in its, butermost position, said frame comprising a pair of hollow cylinders extending laterally thereof, said cradle comprising a pair of laterally exte'ndingmembers cooperating with said cylinders, the external cross sectional dimension of said laterally extend. ing members being less than the internal dimension of said laterally extending cylinders, said cradle comprising a cross member, a pair of upstanding stop members and a pair of relatively short depending legs, the length'of said legs being less than the height of said cylinders above the bottom of said frame, means for preventing said cradle, from being detached from said cylinders when said cradle is pulled to its outermost position, said cradle being adapted to be entirely above the floor when in its innermost position and adapted to have its legs rest upon the v floor when in its outermost position with its lateral members arranged in a plane at a slight angle to the horizontal.

9. A double-sided rotatable ingot mold, a frame for supporting said mold in rotatable relation, the axis of rotation of said mold being longitudinal thereof but closer to one side than the other, whereby the short side may be rotated in a downward direction with but relatively small clearance 'therebelow, and an' inclined conveyor arranged below said rotatable mold and relatively close to the locus of the short side of the 5 rotatable mold.

ALBERT H.. JUNG.

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