US3129474A - Apparatus in continuous casting machines having a reciprocating mold - Google Patents

Apparatus in continuous casting machines having a reciprocating mold Download PDF

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Publication number
US3129474A
US3129474A US154284A US15428461A US3129474A US 3129474 A US3129474 A US 3129474A US 154284 A US154284 A US 154284A US 15428461 A US15428461 A US 15428461A US 3129474 A US3129474 A US 3129474A
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United States
Prior art keywords
mold
casting
cooling
cooling elements
gap
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Expired - Lifetime
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US154284A
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English (en)
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Olsson Erik Allan
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Individual
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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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1246—Nozzles; Spray heads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86187—Plural tanks or compartments connected for serial flow

Definitions

  • the fluid metal is supplied to one end of an open-ended mold which is made from a material having good thermal conductivity, e.g. copper. Due to the cooling action achieved by the mostly water-cooled mold, the metal solidies in the marginal zone of the crosssection of the casting, whereupon the at least partly solidiled casting is withdrawn at the opposite end of the mold.
  • the solid surface layer In order that the partly solidified casting shall be capable of being withdrawn from the mold, however, the solid surface layer must have a certain strength so that it can withstand the sum of all mechanical forces involved, including the head of the lluid metal in the interior of the casting.
  • the efficiency of a continuous casting mold or the casting velocity which can be achieved depends to a large extent on the heat transfer properties of the mold.
  • the casting efhciency of a continuous casting mold can be improved by imparting to the mold a definite rhythmical reciproeating movement in such a manner that the mold for a certain period of time accompanies the movement of the casting with at least approximately the same speed as the casting, so that during this period a relative movement between the mold and casting is prevented. Thereupon the mold is moved in a direction opposite to that of the casting back to the starting point.
  • the effect of the friction forces is eliminated, wherefore the solidifying outer layer at the weakest point immediately below the fluid metal surface is not subjected to mechanical stresses.
  • cooling elements Immediately below the cooling elements direct cooling takes place by means of water under pressure as is usual in most continuous casting processes.
  • this subsequent cooling system there are usually provided a plurality of small guide rollers which also serve to prevent bulging of the solidified outer layer by the action of the internal pressure of the unsolidifled metal.
  • the cooling elements which accompany the mold in such movement, in each stroke expose a length of the casting corresponding at least to the length of the stroke, which length of casting at that point is unsupported from the outside and the outer layer of which under some circumstances has not yet obtained a suicient strength to withstand the internal pressure of the fluid metal.
  • the object of this invention is to remove that disadvantage, the invention being characterized substantially by one or more cooling elements provided at the exit end of the mold and movable independently of the mold, said cooling elements surrounding the casting withdrawn from the mold and cooling it to increase the thickness and consequently the strength of the outer layer solidified in the mold.
  • FIG- URES 1-5 illustrating the cooling process in live stages during a complete stroke of the mold.
  • FIGURE l shows the first stage in which the mold 6 and the cooling elements 7 are in their starting position, i.e. the upper reversing position, indicated at 8, of the stroke which is altogether designated 9.
  • the cooling water nozzles y10 and 11 which are provided around the casting section and the cooling elements 7 and mold 6, are stationary as is also the subsequent cooling means 12 which also includes guiding rollers 13.
  • the casting 14 is withdrawn at a continuous speed the magnitude of which is indicated by the arrow 15. In this starting position the cooling members are immediately below the lower end of the mold.
  • FIGURE 2 shows the second stage in which the mold 6 moves in the direction of withdrawal of the casting 14 at a speed, which is substantially equal to the velocity of withdrawal of the casting.
  • the cooling elements 7 move in the same direction but at a speed which is greater, e.g. twice the speed of the mold 6.
  • a gap 18 which is equal to the distance 19 traveled by the mold if the speed of the cooling members as indicated by the arrow 17 is twice the speed of the mold (indicated by the arrow 16).
  • the casting portion thus exposed is sprayed with water from the nozzles 10.
  • the cooling elements 7 have traversed the entire distance 9 while the mold has moved only half that distance which means that the exposed portion 18 is doubled and is subjected to cooling water from the nozzles 11.
  • the cooling elements 7 remain in the lower position 20, while the mold 6 is still moving down at a constant speed, whereby the exposed portion 18 is reduced while it is still subjected to cooling water from the nozzles 11.
  • the mold At the end of the fth stage shown in FIGURE 5, the mold has caught up with the cooling elements 7, whereby the casting is Iagain wholly enclosed. Thereupon, the mold and cooling elements return at a constant speed to their starting positions (FIGURE l) and the process is repeated.
  • the method of casting comprising pouring a molten metal into one end of a reciprocating mold and continuously withdrawing partially solidied metal from the other end of the mold while wholly surrounding and engaging the entire peripheral surface of the cast metal at said other end with at least one cooling element, moving said cooling element in the casting direction at a speed greater than that of the mold to open a gap between the mold and the cooling element, projecting a cooling fluid onto the cast metal in said gap, stopping said cooling element to close said gap, and returning said mold and cooling element together at the same speed in the direction opposite the casting direction.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
US154284A 1961-01-03 1961-11-22 Apparatus in continuous casting machines having a reciprocating mold Expired - Lifetime US3129474A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE4461 1961-01-03

Publications (1)

Publication Number Publication Date
US3129474A true US3129474A (en) 1964-04-21

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ID=20255964

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Application Number Title Priority Date Filing Date
US154284A Expired - Lifetime US3129474A (en) 1961-01-03 1961-11-22 Apparatus in continuous casting machines having a reciprocating mold

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US (1) US3129474A (de)
DE (1) DE1433044B2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429365A (en) * 1964-12-28 1969-02-25 Mannesmann Ag Continuous slab casting mold
US3931848A (en) * 1973-06-04 1976-01-13 Concast Ag Method and apparatus for cooling a strand cast in an oscillating mold during continuous casting of metals, especially steel
US4033404A (en) * 1974-05-15 1977-07-05 Concast Ag Oscillatory mold equipped with a hollow mold cavity which is curved in the direction of travel of the strand

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2726430A (en) * 1952-11-18 1955-12-13 Continuous Metalcast Co Inc Method and apparatus for preventing warping of continuously cast metal
US2871534A (en) * 1956-04-20 1959-02-03 Wieland Werke Ag Method of continuous casting
US2895190A (en) * 1955-09-12 1959-07-21 Mannesmann Ag Continuous casting plants
SE441961B (sv) * 1977-05-18 1985-11-18 Rockwell International Corp Forfaranden for faststellande av noggrannheten for resp for fornyad kalibrering av en propeller- eller turbinmetare samt anordning for overvakning av noggrannheten hos sadan metare

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2726430A (en) * 1952-11-18 1955-12-13 Continuous Metalcast Co Inc Method and apparatus for preventing warping of continuously cast metal
US2895190A (en) * 1955-09-12 1959-07-21 Mannesmann Ag Continuous casting plants
US2871534A (en) * 1956-04-20 1959-02-03 Wieland Werke Ag Method of continuous casting
SE441961B (sv) * 1977-05-18 1985-11-18 Rockwell International Corp Forfaranden for faststellande av noggrannheten for resp for fornyad kalibrering av en propeller- eller turbinmetare samt anordning for overvakning av noggrannheten hos sadan metare

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429365A (en) * 1964-12-28 1969-02-25 Mannesmann Ag Continuous slab casting mold
US3931848A (en) * 1973-06-04 1976-01-13 Concast Ag Method and apparatus for cooling a strand cast in an oscillating mold during continuous casting of metals, especially steel
US4033404A (en) * 1974-05-15 1977-07-05 Concast Ag Oscillatory mold equipped with a hollow mold cavity which is curved in the direction of travel of the strand

Also Published As

Publication number Publication date
DE1433044B2 (de) 1971-09-02
DE1433044A1 (de) 1968-10-17

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