EP0109357B1 - Elektromagnetische Stranggiesskokille - Google Patents

Elektromagnetische Stranggiesskokille Download PDF

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Publication number
EP0109357B1
EP0109357B1 EP83810489A EP83810489A EP0109357B1 EP 0109357 B1 EP0109357 B1 EP 0109357B1 EP 83810489 A EP83810489 A EP 83810489A EP 83810489 A EP83810489 A EP 83810489A EP 0109357 B1 EP0109357 B1 EP 0109357B1
Authority
EP
European Patent Office
Prior art keywords
end walls
walls
inductor
mold
continuous casting
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
Application number
EP83810489A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0109357A1 (de
Inventor
Walter Haller
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.)
Alcan Holdings Switzerland AG
Original Assignee
Schweizerische Aluminium AG
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 Schweizerische Aluminium AG filed Critical Schweizerische Aluminium AG
Publication of EP0109357A1 publication Critical patent/EP0109357A1/de
Application granted granted Critical
Publication of EP0109357B1 publication Critical patent/EP0109357B1/de
Expired legal-status Critical Current

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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
    • B22D11/01—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces
    • B22D11/015—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces using magnetic field for conformation, i.e. the metal is not in contact with a mould
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/049—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for direct chill casting, e.g. electromagnetic casting

Definitions

  • the invention relates to a continuous casting mold according to the preamble of claim 1.
  • An electromagnetic inductor determines the cross-sectional dimensions of the molten metal strand to be solidified.
  • molten metal is poured at a predetermined speed onto a start-up floor attached within a loop-shaped electrical inductor.
  • the approach floor is lowered at a speed adapted to the casting rate.
  • High-frequency alternating current in the inductor generates an electromagnetic force field which limits the metal melt introduced inside the inductor horizontally in a form which is essentially determined by the inner contours of the inductor loop.
  • a coolant such as water
  • Such systems usually have a tapering electromagnetic shield. This is mounted coaxially inside the inductor and is made of a non-ferromagnetic metal (e.g. stainless steel). Due to its shape, this screen serves to weaken the magnetic field above the inductor, so that the electromagnetic forces constricting the cross section of the bar head are reduced.
  • a further explanation of the advantages of such a screen can be found in US-A-3 605 865 by Getselev, which also forms the preamble of claim 1.
  • Electromagnetic continuous casting molds are complex and costly, especially due to the narrow dimensional tolerances that must be observed during the production of the molds.
  • the numerous different cast ingot formats also entail the uneconomical need to keep a correspondingly large number of molds in stock.
  • An electromagnetic continuous casting mold with a variable resulting casting cross section would therefore be highly desirable; different formats could be made with a mold.
  • a conventional continuous casting mold with adjustable additional mold end walls is known from DE-B-1 059 626 by Kotthaus.
  • the task and structure of a conventional continuous casting mold differ fundamentally from that of an electromagnetic continuous casting mold; therefore there is no possibility of transmission.
  • the mold is used to dissipate the heat of fusion through contact with the melt.
  • it forms the vessel wall for the melt and must therefore be leakproof over its entire circumference.
  • the electromagnetic mold does not come into contact with the melt. It is used to conduct current in a defined manner and also contains devices for additionally influencing the magnetic field.
  • CH-A-470 815 describes an induction heater in which the longitudinal elements of the loops are adjustable; there is no gap between the longitudinal and transverse elements.
  • the inventor has therefore set himself the task of creating an electromagnetic continuous casting mold which enables a change in the resulting casting cross section.
  • the construction of this mold should be relatively simple and its production economical.
  • the adjustment of the mold should be possible in a simple manner.
  • the mold should allow the production of cast ingots with side surfaces that are as flat as possible.
  • An electromagnetic continuous casting mold with the features of claim 1 leads to the solution of this problem.
  • Locking elements are attached to at least one of the end walls, which enable the optional positioning and fastening of these end walls at predetermined locations on the side walls in order to change the dimensions of the mold opening.
  • the inductor and the shield each form a closed loop between the corresponding parts of the side and end walls by means of electrical contact connections (by means of clamping devices). Good electrical contact between the inductor parts and between the shield parts of the individual side and end walls is of great importance.
  • the attachment of electrically conductive contact elements to one of the inductor or shielding points to be contacted is used. Poor contact between the shield parts leads to a poor cast ingot surface.
  • the side walls can be segmented in order to ensure the formation of essentially flat side surfaces of the cast ingots.
  • the mold according to the invention has a simple construction and is relatively inexpensive to manufacture.
  • the mold 10 shown in FIGS. 1 to 3 has a pair of opposing side walls 12 divided into segments and a pair of movable end walls 14, which together form a mold opening 16. Between the ends of the end walls 14 and the side walls 12 there is a gap of, depending on the position, 1 1/2 mm to 13 mm width.
  • the extensions 18 of the end walls 14 can slide on the upper surface of the side walls 12.
  • a spring-loaded locking hook 20 is attached to each extension 18 of the end walls 14 and fits into the openings 22 which are made at certain locations on the upper surface of the side walls 12; the end walls 14 can thus be attached at the desired locations along the side walls 12.
  • the locking element 20, shown in Figure 2 comprises a housing 50 which is inserted into a recess 52 in the extension 18.
  • the pin 56 is supported in a chamber 54 of the housing 50; this is provided with a flange 58, against which a spring 60 is locked, so that the pin 56 is held out of the opening 22.
  • a slot 64 in the top 62 of the housing 50 receives a crossbar 66 attached to the pin 56.
  • the pin 56 is held against the force of the spring 60 in the opening 22 in order to secure the end walls 14 at the desired location of the side walls 12.
  • the side wall 12 of the mold 10 shown in FIG. 3 contains a mold frame 24, to which an insulation body 26 is fastened with screws 28.
  • An induction loop 30, provided with a cooling channel 32, is fastened to the insulation body 26 with screws 34.
  • An electromagnetic screen 36 is attached to the mold frame 24 with screws 37, which leaves a gap 38 to the induction loop 30 so that a cooling jet from the water chamber 40 reaches the surface of the cast ingot via the passage opening 42.
  • the end walls 14 of the mold 10 are constructed in the same way as the side walls 12.
  • clamping devices 72 are mounted on the rear sides 70 of the end walls 14 in the vicinity of the side walls 12, in order to secure both the inductor parts 30 of the side walls 12 with the inductor parts of the end walls 14 and the shield parts 36 of the side walls 12 to be electrically connected to the shield parts of the end walls 14.
  • Each of the clamping devices 72 contains a housing 74 with a bore 76, each of which has a plurality of bearings 78 in order to rotatably support a cylinder 80 therein.
  • 2 cylinders are positively placed one above the other in the bore 76.
  • 2 bores 82 and 82 ′ are let into the housing 74 and open into the bore 76 at a right angle.
  • the cylinders 80 ' are provided with a slot 96 in which a tool for rotating the cylinders 80 and 80' can be attached, so that the clamping pistons 84 are pressed against the inductor parts 30.
  • the parts of the screen 36 belonging to the movable end walls 14 are provided with an electrically conductive contact element 98 fastened thereon, which is pressed against the parts of the screen 36 belonging to the side walls 12 by means of clamping pistons 84.
  • a further clamping device 100 is attached to the mold frame 14 in order to ensure good electrical contact between the induction loop 30 and the electrical connection (not shown).
  • Lines 102 for the cooling liquid connect the cooling channels 32 of the induction loop 30.
  • the side walls 12 of the mold 10 are divided according to the invention into segments which are at a small angle to one another, as a result of which a convex mold opening 16 is formed.
  • the position of the end walls 14 with respect to the side walls 12, as shown in FIG. 1, represents the best possible case with regard to the production of flat side surfaces of the cast ingots. This is impaired by moving the end walls 14 of the mold 10 from this position.
  • the end walls 14 can thus be adjusted from this best position only within a region of the side walls 12 which comprises 25 to 35%, preferably 25 to 30%, of the total length of these side walls 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP83810489A 1982-11-12 1983-10-21 Elektromagnetische Stranggiesskokille Expired EP0109357B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/441,225 US4512386A (en) 1982-11-12 1982-11-12 Adjustable mold for electromagnetic casting
US441225 1982-11-12

Publications (2)

Publication Number Publication Date
EP0109357A1 EP0109357A1 (de) 1984-05-23
EP0109357B1 true EP0109357B1 (de) 1986-12-10

Family

ID=23752028

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83810489A Expired EP0109357B1 (de) 1982-11-12 1983-10-21 Elektromagnetische Stranggiesskokille

Country Status (9)

Country Link
US (1) US4512386A (is)
EP (1) EP0109357B1 (is)
JP (1) JPS59104251A (is)
AU (1) AU564912B2 (is)
CA (1) CA1214019A (is)
DE (1) DE3368217D1 (is)
IS (1) IS1316B6 (is)
NO (1) NO160567C (is)
ZA (1) ZA838009B (is)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3400220A1 (de) * 1984-01-05 1985-07-18 SMS Schloemann-Siemag AG, 4000 Düsseldorf Kokille zum stranggiessen von stahlband
DE3406699C1 (de) * 1984-02-22 1985-01-10 Schweizerische Aluminium Ag, Chippis Elektromagnetische Stranggiesskokille
AU589704B2 (en) * 1985-11-25 1989-10-19 Swiss Aluminium Ltd. Device and process for the continuous casting of metals
FR2609656B1 (fr) * 1987-01-15 1989-03-24 Cegedur Procede de reglage au niveau de la ligne de contact de la surface libre du metal avec la lingotiere dans une coulee verticale de produits de section quelconque
US4796689A (en) * 1987-03-23 1989-01-10 Swiss Aluminium Ltd. Mold for electromagnetic continuous casting
DE19710791C2 (de) * 1997-03-17 2000-01-20 Schloemann Siemag Ag Zueinander optimierte Formen der Stranggießkokille und des Tauchausgusses zum Gießen von Brammen aus Stahl
JP4740518B2 (ja) 2000-07-17 2011-08-03 ボード・オブ・リージエンツ，ザ・ユニバーシテイ・オブ・テキサス・システム 転写リソグラフィ・プロセスのための自動液体ディスペンス方法およびシステム
US6964793B2 (en) 2002-05-16 2005-11-15 Board Of Regents, The University Of Texas System Method for fabricating nanoscale patterns in light curable compositions using an electric field
US6908861B2 (en) * 2002-07-11 2005-06-21 Molecular Imprints, Inc. Method for imprint lithography using an electric field
US6857464B2 (en) * 2002-09-19 2005-02-22 Hatch Associates Ltd. Adjustable casting mold
US7139785B2 (en) * 2003-02-11 2006-11-21 Ip-First, Llc Apparatus and method for reducing sequential bit correlation in a random number generator
US7261830B2 (en) 2003-10-16 2007-08-28 Molecular Imprints, Inc. Applying imprinting material to substrates employing electromagnetic fields
CN103781572B (zh) * 2011-11-09 2016-09-07 新日铁住金株式会社 钢的连续铸造装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424886A (en) * 1966-10-27 1969-01-28 Ajax Magnethermic Corp Induction heating
GB1191070A (en) * 1968-11-29 1970-05-06 Concast Ag Improvements concerning Plate Moulds for Continuous Casting
SU344691A1 (ru) * 1969-12-22 1977-02-05 Устройство дл групповой непрерывной разливки металлов
US3605865A (en) * 1969-12-23 1971-09-20 Getselev Zinovy N Continuous casting apparatus with electromagnetic screen
CH508432A (de) * 1970-03-25 1971-06-15 Concast Ag Verstellbare Plattenkokille zum Stranggiessen
BE756253A (en) * 1970-09-17 1971-03-01 Soudure Autogene Elect Variable diameter chill mould
US3964727A (en) * 1975-06-30 1976-06-22 Gladwin Floyd R Adjustable width continuous casting mold
FR2324395A1 (fr) * 1975-09-17 1977-04-15 Siderurgie Fse Inst Rech Lingotiere a inducteurs incorpores
CH625441A5 (is) * 1977-12-05 1981-09-30 Alusuisse
DE2914246C2 (de) * 1979-03-07 1981-11-12 Schweizerische Aluminium AG, 3965 Chippis Elektromagnetische Stranggießkokille
JPS5927672B2 (ja) * 1979-03-31 1984-07-07 住友軽金属工業株式会社 幅可変鋳型装置

Also Published As

Publication number Publication date
JPS59104251A (ja) 1984-06-16
US4512386A (en) 1985-04-23
IS1316B6 (is) 1988-03-22
JPH0530537B2 (is) 1993-05-10
AU564912B2 (en) 1987-09-03
ZA838009B (en) 1984-06-27
NO834111L (no) 1984-05-14
AU2060083A (en) 1984-05-17
IS2859A7 (is) 1984-05-13
EP0109357A1 (de) 1984-05-23
NO160567C (no) 1989-05-03
CA1214019A (en) 1986-11-18
NO160567B (no) 1989-01-23
DE3368217D1 (en) 1987-01-22

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