US3844333A - Continuous metal castings - Google Patents

Continuous metal castings Download PDF

Info

Publication number
US3844333A
US3844333A US00282121A US28212172A US3844333A US 3844333 A US3844333 A US 3844333A US 00282121 A US00282121 A US 00282121A US 28212172 A US28212172 A US 28212172A US 3844333 A US3844333 A US 3844333A
Authority
US
United States
Prior art keywords
blank
false
sections
section
tipping
Prior art date
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
US00282121A
Other languages
English (en)
Inventor
P Peytavin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CERTIFUGATION SOC CIV D ETUDES
SOC CIVILE D ETUDES DE CERTIFUGATION FR
Original Assignee
CERTIFUGATION SOC CIV D ETUDES
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CERTIFUGATION SOC CIV D ETUDES filed Critical CERTIFUGATION SOC CIV D ETUDES
Application granted granted Critical
Publication of US3844333A publication Critical patent/US3844333A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B22D11/081—Starter bars
    • B22D11/083—Starter bar head; Means for connecting or detaching starter bars and ingots

Definitions

  • ABSTRACT [30] Foreign Application Priority Data Aug. 25, l97l France 71.30834
  • the ontinuous casting of metal blanks is effected by using a false blank to initiate the casting process, the [52] U.S. Cl. 164/82, 164/282 blank being cast through a mould on to the upper end [51] Int. Cl 322d 11/00 of the false blank, The false blank is formed of at least Fleld 0f Search two sections screw-threaded together. These sections v 85 are of a length to conform with the length of the sections into which the cast blank will be cut.
  • the invention relates to a process and apparatus for initiating a continuous casting process for metals, such as steel, in order to obtain solid or hollow metallic bars or blanks (hereinafter for convenience simply called blanks).
  • This cutting is effected at the lower part of the continuous casting apparatus each blank length being received in a tipping device which turns them from a vertical to a horizontal altitude and discharges them into a removal device or conveyor.
  • the blank In conventional continuous casting processes the blank, during production, is not rotated about its longitudinal axis but is merely urged downwards by an extraction device. ln this case, the blank may also be cut into lengths as indicated above.
  • the blanks produced cannot be cut in the zone where the molten metal is located at the centre of the blank, and equally, for safety reasons, sectioning of the blank can only be effected beyond the point where the blank has become solidified.
  • This height of molten metal core is critical as regards the dimensions of the casting apparatus for a given section and rate of throughput since it is necessary to provide for such a height, a satisfactory guide and driving means for the bar in the course of solidification.
  • molten metal which is then introduced into the mould is fused to the upper part of the false blank which is also guided and moved by thedevice provided for the continuous operation, so that there is thus obtained, as soon as the continuous casting process has got under way, a functioning which is practically the tion, a false blank must be provided the length of which corresponds to the height of the apparatus which is (as has previously been explained) determined by the height of the blank in which there is a certain amount of molten metal at the centre.
  • first cut which may be made during the continuous casting process may only be made above the false blank.
  • the tipping device which is located below the known apparatus must have a sufficient length to receive and tilt the false blank.
  • the tipping device which is located at the lower part of the apparatus, must be dimensioned to pivot the false blank and this is found to be much bigger than would be necessary for pivoting the blank sections, since these sections are usually notably shorter than the false blank used for starting the process.
  • An object of the present invention is therefore a process and apparatus which make it possible to obviate or mitigate this drawback very simply.
  • a process for initiating a continuous casting process for metals, such as steel by using a false blank intended to serve as the lower part of the blank during production, said flase blank and the blank sections produced being received and discharged by a device located at the lower part of the casting apparatus, and the false blank being obtained by interconnecting a plurality of sections each having a length corresponding to the length of the blank sections which it is desired to cast, the false blank sections being screwed together, and each false blank section which reaches the bottom the guide and extraction means of the apparatus being separated from its upper section by a relative rotary movement which effects the unscrewing and separation of the lower section which is then received in' the discharging device.
  • the process is applied to a continuous rotary casting process in which the blank being formed is rotated about a vertical axis.
  • the lower section of the false blank is unscrewed very simply by means of a gripper or locking device located at the lower part of the guiding and extracting means, for example substantially on a level with the device for cutting the blank into sections, the direction of the screw-threading allowing the unscrewing of the lower section when this section is held stationary while the upper sections continue to rotate.
  • a gripper or locking device located at the lower part of the guiding and extracting means, for example substantially on a level with the device for cutting the blank into sections, the direction of the screw-threading allowing the unscrewing of the lower section when this section is held stationary while the upper sections continue to rotate.
  • the unscrewing of the lower false blank section may easily be effected by rotating the lower section of the false blank about its vertical axis. This rotation may be effected by any device which grips the lower part of the false blank and rotates it.
  • the process according to the invention makes, it possible to subdivide the false blank very easily into as many sections as are desired, each section of the false blank being detached, tipped and removed by means of the tipping device which is dimensioned .solely as a function of the cast metallic blank sections which it must handle during the continous casting process proper.
  • the use of a sectioned false blank has the advantage of facilitating the introduction of the false blank into the apparatus by the tipping device at the instant when one prepares to initiate the continuous casting.
  • the false blank sections may also be introduced successively, since they are of reduced dimensions, at the upper part of the apparatus, i.e., through the casting mould, the sections being moved down progressively while the subsequent sections are introduced successively at the top.
  • the present invention is also apparatus for continuously casting metallic blanks, for example of steel, in which molten metal is introduced into a cooled mould, and the blank during solidification being held in guide and extraction means disposed vertically beneath the mould, the apparatus being characterised by the fact that a device, for receiving and discharging the blank sections, disposed at the lower part of the apparatus, is dimensioned as a function of the length of the blank sections which it is desired to case, and that a false blank located in the guide and extraction means at the beginning of the continuous casting process, is subdivided into sections, the length of each which is at the' most substantially equally to the length of the blank sections which it is desired to cast, the various flase blank sections being screwed together, means being located, preferably between the lower part of the guiding and extracting means and the discharge device, which is capable of imparting to the lower false blank section a relative movement with respect to the other upper false blank sections, so as to unscrew said lower section, which may then be discharged by the discharge device, or by reversing
  • the means for imparting the relative movement to the lower section of the false blank is constituted by a holding device or similar means which prevents the lower section from rotating.
  • the means which impart the relative movement to the lower section is constituted by a gripping device, which engages the lower section and rotates it about a vertical axis.
  • FIGS. 1, 2 and 3 are diagrammatic elevation views showing three stages of the process for removing the false blank sections, in the case of a continuous rotary casting process.
  • FIGS. 4, 5 and 6 are diagrammatic views showing three stages of the removal of the lower sections of the false blank in the case of a continuous non-rotary casting process.
  • FIGS. 1, 2 and 3 There is diagrammatically shown in FIGS. 1, 2 and 3 a continuous rotary casting apparatus according to the invention.
  • the apparatus comprises at its upper part a cooled mould l rotating about its vertical axis, into which is directed a jet 2 of molten metal which serves to produce the blank.
  • guide rollers 3 which are diagrammatically shown, are located, the function of which is to hold the blank as it solidifies laterally, while it is moved down by extractor rollers 4 which are also arranged in a casing rotating about a vertical axis, in the direction of the arrows F of FIG. I.
  • a false blank 5 constituted by an assembly of two sections 5a and 5b interconnected by screw threading 6, is disposed between the rollers 3 and 4.
  • a tipping device is diagrammatically shown, which device receives the blank sections and discharges them after having pivoted them about a horizontal axis 8.
  • This device 9 may be of any convenient from. It may be constituted by a saw or a cutting flame, for example.
  • a gripper device 10 In addition to the cutting device 9, there is diagrammatically shown a gripper device 10.
  • This device 10 which may be of any convenient form is constituted in this instance, by two jaws, for example, disposed on either side of the axis of the blank being cast, said jaws allowing, in the open position, free passage of the false blank while in the closed position they engage the false blank and prevent it from rotating.
  • the sense of the screwthreading 6 and the direction of rotation of the blank as indicated by the arrow F is selected so that when the lower section of the false blank is held stationary an unscrewing of this section occurs with respect to the section immediately above it.
  • the false blank is constituted by two sections.
  • the false blank may have any convenient number of sections dependent on each section corresponding in length to the length of each blank section being cast and the dimensions of the tipping device 7.
  • the total length of the false blank corresponds to the total height of the apparatus i.e., to the length of the apparatus between the mould l and the extraction or guide rollers 3, 4.
  • FIG. 1 shows the two false blank sections positioned between the guide and extraction rollers 3, 4 at the instant when casting begins.
  • the false blank is rotated in the direction of arrows F in the same manner as the blank being cast is rotated during the casting operation.
  • the molten metal firstly enters the mould at 2, where it becomes solid and adheres to the upper part of the upper section 5b of the false blank.
  • the extractor rollers 4 slowly move the assembly constituted by the false blank and solidifying metal which is commencing to form a blank downwards.
  • the section 5a of the false blank is gripped by the device which prevents the section 5a from rotating, while the section 5b continues to rotate at the same time as the bar 11 which is being cast.
  • the gripper device 10 is then loosened, as shown in FIG. 3, and the section 5a falls into the tipping device 7 which, by pivoting about the axis 8 in the direction of the arrow F, dispose the section 5a in the horizontal position and discharges it so that the sequence can be repeated.
  • the gripper device 10 which prevents the lower section 5a from rotating, may preferably be moved slightly downwards so as to follow the downward movement of the section 5a, a movement which is necessary, on the one hand, for the vertical extraction speed of the blank and, on the other hand, for the axial component of the unscrewing movement of the section 5a with respect to the section 5b.
  • the section 5b is released by using the cutting device 9 for cutting the blank 11 into lengths just above the section 5b, which is then extracted by the tipping device 7.
  • FIGS. 4 to 6 show the application of the invention in the case of a non-rotary continuous casting process.
  • FIGS. 4 to 6 show substantially the same components as FIGS. 1 to 3, with, however, the following differences.
  • the extraction and guide device comprises only rollers 4, only certain of which may be propulsive.
  • the main difference relates to the device 10, which effects unscrewing of the lower section 5a of the false blank.
  • this device 10 is formed not only to engage the section 5a but also to rotate it in a direction such that the section 5a is unscrewed with respect to the section 5b.
  • the invention makes it possible to extract the false blank easily, by means of tipping devices of small dimensions, in the case of both continuous rotary casting operations and continuous non-rotary casting operations.
  • the invention is applicable both to the production of solid as well as hollow blanks, and that the cross-sectional shape of the blanks has no influence in the carrying out of the process.
  • a device could be used which receives the false blank sections. or cast blank sections vertically and moves them parallel to each other in order to extract them vertically after having disengaged them from the continuous casting line.
  • a method of initiating the continuous casting of a metallic object which is to be cut into sections comprises the steps of introducing a false blank beneath the metal being cast to form said object, and receiving said false blank and object successively in guide means and a tipping extractor beneath said guide means, which extractor is dimensioned to tip severed sections of said object having at most a predetermined maximum length out of alignment with said guide means,
  • a false blank comprising a plurality of sections which are screwed together, the length of each section being at most equal to said maximum length, and separating the lowermost section of said false blank from the remainder of said false blank during the descent of said false blank by unscrewing said lowermost section therefrom, and then tipping said lowermost section in said tipping extractor once it has passed below said guide means.
  • the improvement which comprises the steps of employing a false blank which rotates with said object and comprises a plurality of sections which are screwed together, the length of each section being at most equal to said maximum length and separating the lowermost section of said false blank from the remainder of said false blank by unscrewing said lowermost section therefrom by preventing rotation of said lowermost section and tipping said lowermost section in said tipping extractor once it has passed below said gudie means.
  • a process as claimed in claim 1 comprising the step of employing a false blank having sections substantially equal in length to the severed sections of said object.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Specific Conveyance Elements (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Continuous Casting (AREA)
  • Furnace Charging Or Discharging (AREA)
US00282121A 1971-08-25 1972-08-21 Continuous metal castings Expired - Lifetime US3844333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7130834A FR2150237B1 (enrdf_load_stackoverflow) 1971-08-25 1971-08-25

Publications (1)

Publication Number Publication Date
US3844333A true US3844333A (en) 1974-10-29

Family

ID=9082204

Family Applications (1)

Application Number Title Priority Date Filing Date
US00282121A Expired - Lifetime US3844333A (en) 1971-08-25 1972-08-21 Continuous metal castings

Country Status (7)

Country Link
US (1) US3844333A (enrdf_load_stackoverflow)
JP (1) JPS4830629A (enrdf_load_stackoverflow)
CA (1) CA966973A (enrdf_load_stackoverflow)
DE (1) DE2241422A1 (enrdf_load_stackoverflow)
FR (1) FR2150237B1 (enrdf_load_stackoverflow)
GB (1) GB1406843A (enrdf_load_stackoverflow)
IT (1) IT964046B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018161156A1 (en) * 2017-03-10 2018-09-13 8617490 Canada Inc. Tubular shape casting apparatus
US11020795B2 (en) * 2017-04-20 2021-06-01 Inteco Melting And Casting Technologies Gmbh Method and device for producing foundry ingots from metal

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2176990A (en) * 1937-08-18 1939-10-24 Chase Brass & Copper Co Apparatus for continuously casting metals
US3239894A (en) * 1963-03-06 1966-03-15 United States Steel Corp Starter-bar head with make-and-break joint
US3565157A (en) * 1969-01-22 1971-02-23 Civille D Etudes De Centrifuga Machine for automatically cutting vertical castings and swinging away the portion of the casting which has been cut off

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2176990A (en) * 1937-08-18 1939-10-24 Chase Brass & Copper Co Apparatus for continuously casting metals
US3239894A (en) * 1963-03-06 1966-03-15 United States Steel Corp Starter-bar head with make-and-break joint
US3565157A (en) * 1969-01-22 1971-02-23 Civille D Etudes De Centrifuga Machine for automatically cutting vertical castings and swinging away the portion of the casting which has been cut off

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018161156A1 (en) * 2017-03-10 2018-09-13 8617490 Canada Inc. Tubular shape casting apparatus
US10946438B2 (en) 2017-03-10 2021-03-16 8617490 Canada Inc. Tubular shape casting apparatus
US11020795B2 (en) * 2017-04-20 2021-06-01 Inteco Melting And Casting Technologies Gmbh Method and device for producing foundry ingots from metal

Also Published As

Publication number Publication date
CA966973A (en) 1975-05-06
DE2241422A1 (de) 1973-03-01
JPS4830629A (enrdf_load_stackoverflow) 1973-04-23
IT964046B (it) 1974-01-21
FR2150237A1 (enrdf_load_stackoverflow) 1973-04-06
GB1406843A (en) 1975-09-17
FR2150237B1 (enrdf_load_stackoverflow) 1974-05-10

Similar Documents

Publication Publication Date Title
CN111426528B (zh) 一种用于取样探头自动分离金属样品体的分离设备及其方法
CH661673A5 (de) Stranggiessverfahren fuer metalle und vorrichtung zu dessen durchfuehrung.
US2752648A (en) Apparatus for the production of tubular metallic objects
US3844333A (en) Continuous metal castings
US4493363A (en) Method at continuous casting of steels and metal alloys with segregation tendency and apparatus for carrying out the method
US3610320A (en) Unit for manufacturing hollow metal ingots
US4989437A (en) Method and apparatus for extruding metal
US4317271A (en) Method of making metal tubes
EP0685281B1 (de) Verfahren und Anlage zum Stranggiessen von endabmessungsnahen Giessformaten
DE2164755B2 (de) Verfahren und Vorrichtung zum Gießen und zur Erstarrungslenkung von Gußstücken in Gießformen
EP2788140A1 (de) Vorrichtung zum schneiden eines giessstranges einer stranggiessanlage
US2749609A (en) Method of forming hollow metal articles
KR0116785Y1 (ko) 더미바 헤드의 초주편 자동분리 장치
EP2790855B1 (de) VERFAHREN ZUR WARTUNG UND/ODER REPARATUR DES AUSGUSSBEREICHS EINES METALLURGISCHEN GEFÄßES
KR200302455Y1 (ko) 기공 발생 방지를 위한 쇳물시료 분리장치
DE19710887C2 (de) Verwendung einer Kokille zum Herstellen von Barren aus Leichtmetall oder einer Leichtmetallegierung, insbesondere aus Magnesium oder einer Magnesiumlegierung
DE2115669C3 (de) Verfahren zur Erzeugung von hohlen Metallblöcken durch Elektroschlacke-Umschmelzen und Einrichtung zur Durchführung dieses Verfahrens
DE1508882C3 (de) Ofenabhängige Stranggießkokille mit einer ortsfesten Kühleinrichtung und eine Vorrichtung zum Auswechseln der Stranggießkokille
SU1106579A2 (ru) Кокильный поддон
DE3722166C2 (enrdf_load_stackoverflow)
SU1348058A1 (ru) Головка затравки машины непрерывного лить заготовок
US3469721A (en) Apparatus for vertical extraction of material
DD288995A5 (de) Verfahren und vorrichtung zur herstellung von hohlkoerpern
JPS56151171A (en) Method for finishing of build-up welded article
DE1902353C3 (de) Einrichtung zum Ausscheiden der Schlacke beim Gießen von Metall oder Legierungen