US3464482A - Continuous casting - Google Patents

Continuous casting Download PDF

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Publication number
US3464482A
US3464482A US567179A US3464482DA US3464482A US 3464482 A US3464482 A US 3464482A US 567179 A US567179 A US 567179A US 3464482D A US3464482D A US 3464482DA US 3464482 A US3464482 A US 3464482A
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US
United States
Prior art keywords
casting
dummy bar
head
carriage
mould
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US567179A
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English (en)
Inventor
Joseph Irwin Greenberger
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United Engineering and Foundry Co
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United Engineering and Foundry Co
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Assigned to PITTSBURGH NATIONAL BANK reassignment PITTSBURGH NATIONAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WEAN UNITED, INC., A CORP.OF OH
Anticipated expiration legal-status Critical
Assigned to PITTSBURGH NATIONAL BANK reassignment PITTSBURGH NATIONAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WEAN UNITED, INC., A CORP. OH.
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/08—Accessories for starting the casting procedure
    • B22D11/085—Means for storing or introducing the starter bars in the moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/08—Accessories for starting the casting procedure

Definitions

  • An essential part of a casting machine consists of what is generally referred to as a dummy bar mechanism, which is employed to support the bottom of the casting as it is initially formed in the mould.
  • the upper end of the dummy bar is usually provided with a plug or starter head which is inserted into the lower end of the open ended mould to which the molten metal initially solidifies and after which the dummy bar is gradually lowered away from the mould as the casting is progressively formed.
  • the plug or starter head is usually designed to be quickly detachable form the dummy bar so that the bar can be disengaged during the downward travel of the bar, thus allowing the bar to be removed and permitting at the same time the casting to be cut into the required lengths after which it can be conveyed away from the casting machine.
  • Prior dummy bar mechanisms usually have been made up of a number of separate bars which, prior to the pouring of the molten metal into the mould, were individually passed up through the entire machine to furnish the necessary composite length dummy bar to provide the necessary support for the casting.
  • the separate bars which may have numbered sixteen in a multiple strand, extended from the withdrawal rolls of the casting machine to the mould for a distance that may have reached 40 to 50 feet. Since the separate dummy bar sections had to be individually handled when inserted into and when removed from the machine, it is evident that considerable time was required in addition to substantial manpower to use the usual dummy bar mechanism.
  • the removable dummy bars require space for storage, which space in the immediate vicinity of the machine is at a premium, so that the dummy bars were usually stored away from where they were used which increased the time and manpower re- States Patent ice quired to perform the dummy bar operation. It should also be pointed out that in the employment of the large number of disconnected bars difficulty is experienced in guiding the bars and keeping them in proper supporting position and continuous aligned relationship.
  • the present invention provides for a casting machine, a flexible dummy bar constructed so as to collapse in one direction only.
  • the invention provides for a casting machine, a dummy bar having a plurality of links connected together so as to flex relative to one another in one direction and to resist relative flexing in the other direction.
  • FIGURE 1 is an elevational view of a casting machine incorporating a dummy bar mechanism built in accordance with the features of the present invention
  • FIGURE 2 shows a second embodiment of dummy bar mechanism being an elevational section similar to FIGURE 1,
  • FIGURE 3 is an enlarged section of the flexible portion of the dummy bar illustrated in FIGURES 1 and 2, and
  • FIGURE 4 is an enlarged view of the upper end of the dummy bar shown in FIGURES 1 and 2.
  • a ladle 10 that delivers molten metal to a tundish 11, the tundish being mounted on a car 12 supported by rails 13 to allow the tundish to be moved relative to the casting line.
  • the entire assembly is carried by a super-structure.
  • the tundish discharges molten metal into a mould 14 which in the form shown has a stationary secondary cooling section 15 attached to the lower end of the mould. Following the secondary cooling section 15 there are three secondary cooling sections 16, 17 and 18, the secondary cooling sections being contained in a shroud 19.
  • a pinch roll unit 22 which consists of two pairs of pinch rolls 23 and 24 which are driven by a motor 25 through a gear reduction unit 26 and spindles 27.
  • the pinch roll unit 22 is also carried by an upper super-structure.
  • abutment 28 against which the casting is engaged during the disengagement of the dummy bar from the casting.
  • a casting catching device 25A which is mounted on a trunnion 26A which allows the catching device to swing from a vertical position to a horizontal position in which the casting is disposed on a pluralit yof driven table rollers 27A by which the casting will be removed from the machine.
  • the catching device 25A is rotated about the trunnion 26A by a piston cylinder assembly 29.
  • a-r mechanism which includes a housing carriage 32 having a number of wheels 33 which are received in parallel tracks 34 by which means the carriage 32 is traversed from a place in line with the path of travel of the casting to a place remote therefrom, the latter position being shown in the drawing in phantom. This movement is accomplished by cylinder 35.
  • FIGURE 1 shows that the carrier 32 has three pairs of vertically spaced-apart guide rollers, 37, 38 and 39.
  • the rollers 38 as indicated, are driven by a, reversible motor 42.
  • the carriage 32 carries a transition head portion 43 of the dummy bar mechanism.
  • the transition head 43 actually consists of a secondary head 45 to which a plug 44 to which the casting will adhere on initial rapid solidification is secured and which head is detachably connected to the primary head 46 by a quick release detent connection.
  • a secondary head 45 Forming part of this connection and projecting from the secondary head is an L shaped projection 47 having a cylindrical surface 47a at its projected end. This surface is received in a recess 48 formed in the primary head 46 and resiliently retained there by a spring-biased detent ball 49.
  • the construction being such that the primary and secondary heads are normally held together by the spring-biased ball 49, but upon lateral force being applied, the heads can be quickly and easily separated from each other. In this way, the casting formed on the secondary head 45 can be quickly detached from the primary head 46 during downward movement of the casting.
  • the cross section of the head 43 approximates that of the casting being formed. Its lower end, however, is reduced in size and is connected to the first of a number of flexible links 51, as shown in FIGURE 1.
  • These links are explained more fully hereinafter and are designed to collapse only in one direction and form a rigid column when in an upright supporting position.
  • the links extend in a horizontal direction towards the left of the drawing where they are supported on a beam 52.
  • the other end of the link is connected to a cable 53 which, in turn, is connected to a winch 54 which is driven by a reversible electrical motor 55.
  • the dummy bar carriage 32 When the casting machine is producing castings, the dummy bar carriage 32 will be in the withdrawn position, shown in phantom in FIGURE 1, having been brought there by the operation of the piston cylinder assembly 35. While in this position, the transition head 43, if such is necessary, can be changed to suit the new casting size should the next casting cycle involve a change. In any event, a plug 44 will be inserted in the secondary head 45. After the l-adle is empty and the end of the casting has passed through the machine, the piston cylinder assembly 35 will be operated to move the carriage 32 into position directly under the pinch roll unit 22. Following this, the motor 42 will be operated to drive the pair of rollers 38 in a manner to cause the head 43 to move upwardly into the pinch roll unit 22.
  • the motor 55 will be operated to provide slack in the cable 53. Since there will be no change in the size of the casting, there will be no need to adjust the pinch rolls 22 and 24 or the guides in the secondary cooling units and 18.
  • the operation of the motor 42 of the rollers 38 will cause the head 43 to move upwardly through the casting machine, which operation will be continued until the plug 44 supported by the transition head 43 has entered into the lower portion of the mould 14.
  • the flexible links 51 As the flexible links 51 are advanced into the straight position, they will assume a rigid supporting condition to support the weight of the casting.
  • the motor 42 of the rollers 38 and the motor 55 of the winch 54 are operated to allow the transition head 43 to be slowly withdrawn from the mould 14 until the secondary head 45 is in the vicinity above the abutment 28 when in the raised position.
  • the piston cylinder assembly will be then automatically operated so as to withdraw the carriage. When this occurs, the casting will come into engagement against the abutment 28 which will cause the detent connection of the head 43 to release the head and allow automatic disengagement thereof from the casting without stopping the casting which will now be drivenly engaged by the pinch rolls 23 and 24.
  • FIGURE 2 there is shown a ladle 61 and a tundish 62 which are adapted to be brought from a place to one side of the path of travel of the casting to a position over a mould 63.
  • the drawing illustrates in hard lines the ladle 61 and tundish 62 in their inoperative position which is a position they assume when the dummy bar mechanism is being employed preparatory to a subsequent casting operation.
  • a secondary cooling section 64 which as in the case of FIGURE 1, is received in a shroud 65.
  • the secondary cooling section has a number of guiding rolls 66, several of which are illustrated.
  • a pinch roll mechanism 67 consisting of two driven pairs of rolls 68 and 69.
  • a casting cut-off mechanism 71 which may take the form of an acetylene torch or shear or saw.
  • an abutment 72 Located below the cut-off mechanism 71 there is provided an abutment 72 followed by a carriage 73 of the dummy bar mechanism. As with the carriage 32 of FIGURE 1 the carriage 73 is positionable under the casting machine in one instance and in a second instance, to one side thereof, the latter position being illustrated in FIGURE 2 in phantom.
  • the casting machine receives a dummy bar head 74 to which there is secured a plug 75, the lower end of the head 74, as in the case of the FIGURE 1 embodiment, is connected to the series of flexible links 76 constructed in accordance with arrangements shown in FIGURES l and 3.
  • Links 76 are connected to a cable 77 which is received in a pulley network, consisting of three pulleys, 78, 79 and 81; the pulley 79 being driven by a motor 82.
  • the cable is long enough to form a continuous loop with its one end connected to the end link 76 and its other end to the top of the dummy bar plug 75.
  • the pulleys 79 and 81 are mounted on an arm 83 being supported by a column 84 in such a manner that when not in use the pulley 81 can be moved to a position away from the mould 63, thereby allowing the ladle and tundish to be brought into their operative position, it being understood that when this occurs the cable 77 has been disconnected from the plug 75.
  • the carriage 73 In the performance of inserting the dummy bar, the carriage 73 is positioned beneath the mould 63 and the cable 77 is brought down through the mould and cooling sections and attached to the plug 75. After this operation is performed, the motor 82 is operated to cause the cable 77 and head 74 to be brought up through the casting machine until the plug is at the bottom of the mould 63.
  • the cable will be released from the plug and withdrawn from the mould after which the beam 83 will be removed to allow the ladle 61 and tundish 62 to be positioned for commencing of the casting operation.
  • the motor 82 will be operated to withdraw the head 74 from the casting machine.
  • the carriage 73 will be withdrawn to its inoperative position during which action the casting will be automatically disconnected from the head 74.
  • a dummy bar mechanism for use with a continuous vertical casting machine wherein the cast article has a predetermined path of travel
  • said casting machine including a vertical open-ended mold in which the cast article is formed and a vertical article advancing means spaced downstream from the mold for advancing the cast article away from the mold;
  • said dummy bar mechanism comprising a starter section and a carrying section
  • a carriage located below said advancing means adapted to support said starter and carrying sections and having an operative position where the sections are arranged to receive and support a cast article and an inoperative position to the one side of said path of travel;
  • an abutment located laterally of the path of travel in a manner to be engaged by said casting on movement of said carriage from its operative position to its inoperative position;
  • said disengageable member comprises cooperative coupling element-s constructed to allow lateral movement of the carrying section away from the starter section.
  • said carrying section is made up of a plurality of links connected together so as to flex relative to one another in one direction and to resist relative flexing in the other direction.
  • a drive means comprising a flexible pulley means one end of which is extendable through the mold of the casting machine and connected to the upper end of said starter section, support means for said pulley means arranged directly above the mold means for bringing said support means into an operative position where it is over the mold and to an inoperative position away from the mold.
  • a dummy bar mechanism including an abutment arranged below the mold of the casting machine and above said carriage on the side on which the carriage is withdrawable to said inoperative position, said abutment having a surface adjacent to the path of travel of the cast article and engageable by the moving cast article to cause relative movement between the cast article and said carrying section upon withdrawal of said carriage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Forging (AREA)
US567179A 1965-07-23 1966-07-22 Continuous casting Expired - Lifetime US3464482A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31613/65A GB1156497A (en) 1965-07-23 1965-07-23 Continuous Casting

Publications (1)

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US3464482A true US3464482A (en) 1969-09-02

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US567179A Expired - Lifetime US3464482A (en) 1965-07-23 1966-07-22 Continuous casting

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US (1) US3464482A (de)
BE (1) BE684573A (de)
DE (1) DE1297821B (de)
ES (1) ES329450A1 (de)
GB (1) GB1156497A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581808A (en) * 1968-12-26 1971-06-01 Gamma Engineering Ltd Starting device for continuous casting machine
US3593792A (en) * 1967-06-14 1971-07-20 Schloemann Ag Dummy bar for continuous casting
US3661199A (en) * 1969-10-21 1972-05-09 Schloemann Ag Dummy bar storage apparatus
US3682233A (en) * 1970-09-02 1972-08-08 Pennsylvania Engineering Corp Continuous casting machine starting system
US3847206A (en) * 1972-06-14 1974-11-12 Kaiser Aluminium Chem Corp Self-centering bottom block assembly
US4121652A (en) * 1976-02-26 1978-10-24 Vereinigte Osterreichische Eisen-Und Stahlwerke - Alpine Montan Aktiengesellschaft Apparatus for separating a starter bar having a starter bar head from a hot strand crop-end in a continuous casting plant
US4161209A (en) * 1976-08-21 1979-07-17 Demag Aktiengesellschaft Apparatus for handling the starting strand of a metal strand casting plant
US4454907A (en) * 1981-12-02 1984-06-19 Aluminum Company Of America Continuous casting mold-starting plug alignment system
CN102248140A (zh) * 2011-07-18 2011-11-23 永兴特种不锈钢股份有限公司 灌引流砂装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB728412A (en) * 1952-02-20 1955-04-20 Boehler & Co Ag Geb Improvements in or relating to continuous casting plants
GB971268A (en) * 1960-12-28 1964-09-30 Schloemann Ag Improvements in and relating to continuous casting plants
US3157920A (en) * 1962-04-03 1964-11-24 Concast Ag Continuous casting plant with deflection of the casting
US3239894A (en) * 1963-03-06 1966-03-15 United States Steel Corp Starter-bar head with make-and-break joint
US3305899A (en) * 1963-07-10 1967-02-28 United Steel Companies Ltd Dummy bar for continuously casting metals
US3324934A (en) * 1963-09-02 1967-06-13 Schloemann Ag Dummy bar with a separable dummy bar head
US3338297A (en) * 1964-03-06 1967-08-29 United States Steel Corp Apparatus for bending a casting having a liquid core
US3344844A (en) * 1964-08-10 1967-10-03 Koppers Co Inc Apparatus for handling a curved continuous casting starting bar
US3351124A (en) * 1964-01-28 1967-11-07 Schloemann Ag Continuous casting plant
US3370641A (en) * 1965-01-11 1968-02-27 United Eng Foundry Co Reciprocating mold and coolant-support section continuous casting machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT178028B (de) * 1951-12-19 1954-03-25 Gustav Magenwirth Komm Ges Fab Drehgriff, insbesondere an kraftfahrzeuglenkern
AT178029B (de) * 1952-06-18 1954-03-25 Jiri Mraz Einbau eines Saugdämpfers, vorzugsweise für Motorräder
CH345121A (de) * 1956-09-21 1960-03-15 Moossche Eisenwerke Ag Verfahren zum kontinuierlichen Giessen eines Metallstranges und Stranggiessanlage zur Durchführung dieses Verfahrens

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB728412A (en) * 1952-02-20 1955-04-20 Boehler & Co Ag Geb Improvements in or relating to continuous casting plants
GB971268A (en) * 1960-12-28 1964-09-30 Schloemann Ag Improvements in and relating to continuous casting plants
US3157920A (en) * 1962-04-03 1964-11-24 Concast Ag Continuous casting plant with deflection of the casting
US3239894A (en) * 1963-03-06 1966-03-15 United States Steel Corp Starter-bar head with make-and-break joint
US3305899A (en) * 1963-07-10 1967-02-28 United Steel Companies Ltd Dummy bar for continuously casting metals
US3324934A (en) * 1963-09-02 1967-06-13 Schloemann Ag Dummy bar with a separable dummy bar head
US3351124A (en) * 1964-01-28 1967-11-07 Schloemann Ag Continuous casting plant
US3338297A (en) * 1964-03-06 1967-08-29 United States Steel Corp Apparatus for bending a casting having a liquid core
US3344844A (en) * 1964-08-10 1967-10-03 Koppers Co Inc Apparatus for handling a curved continuous casting starting bar
US3370641A (en) * 1965-01-11 1968-02-27 United Eng Foundry Co Reciprocating mold and coolant-support section continuous casting machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593792A (en) * 1967-06-14 1971-07-20 Schloemann Ag Dummy bar for continuous casting
US3581808A (en) * 1968-12-26 1971-06-01 Gamma Engineering Ltd Starting device for continuous casting machine
US3661199A (en) * 1969-10-21 1972-05-09 Schloemann Ag Dummy bar storage apparatus
US3682233A (en) * 1970-09-02 1972-08-08 Pennsylvania Engineering Corp Continuous casting machine starting system
US3847206A (en) * 1972-06-14 1974-11-12 Kaiser Aluminium Chem Corp Self-centering bottom block assembly
US4121652A (en) * 1976-02-26 1978-10-24 Vereinigte Osterreichische Eisen-Und Stahlwerke - Alpine Montan Aktiengesellschaft Apparatus for separating a starter bar having a starter bar head from a hot strand crop-end in a continuous casting plant
US4161209A (en) * 1976-08-21 1979-07-17 Demag Aktiengesellschaft Apparatus for handling the starting strand of a metal strand casting plant
US4454907A (en) * 1981-12-02 1984-06-19 Aluminum Company Of America Continuous casting mold-starting plug alignment system
CN102248140A (zh) * 2011-07-18 2011-11-23 永兴特种不锈钢股份有限公司 灌引流砂装置

Also Published As

Publication number Publication date
GB1156497A (en) 1969-06-25
DE1297821B (de) 1969-06-19
BE684573A (de) 1967-01-03
ES329450A1 (es) 1967-11-01

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Owner name: PITTSBURGH NATIONAL BANK

Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP.OF OH;REEL/FRAME:004458/0765

Effective date: 19850610

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Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP. OH.;REEL/FRAME:004792/0307

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Owner name: PITTSBURGH NATIONAL BANK

Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP. OH.;REEL/FRAME:004792/0307

Effective date: 19860630