EP0206869A1 - Continuous-casting machine for sheet metal - Google Patents

Continuous-casting machine for sheet metal Download PDF

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Publication number
EP0206869A1
EP0206869A1 EP86401134A EP86401134A EP0206869A1 EP 0206869 A1 EP0206869 A1 EP 0206869A1 EP 86401134 A EP86401134 A EP 86401134A EP 86401134 A EP86401134 A EP 86401134A EP 0206869 A1 EP0206869 A1 EP 0206869A1
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EP
European Patent Office
Prior art keywords
wall
casting
wheel
installation according
strip
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Granted
Application number
EP86401134A
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German (de)
French (fr)
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EP0206869B1 (en
Inventor
Jacques Barbe
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Clecim SAS
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Clecim SAS
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Priority to AT86401134T priority Critical patent/ATE54588T1/en
Publication of EP0206869A1 publication Critical patent/EP0206869A1/en
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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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars

Definitions

  • the subject of the invention is a continuous metal casting installation on a casting wheel, in the form of a thin strip.
  • Installations for the continuous casting of steel have long been known in the form of bars called billets or thick plates called slabs.
  • casting is generally done in a bottomless mold forming an ingot mold with cooled walls.
  • the steel poured into the ingot mold and cooled superficially along the walls thereof, is evacuated by an outlet orifice in the form of a strikethrough or a strip comprising, at the outlet of the ingot mold, a central part still liquid maintained by a crust, solidified.
  • the mold is animated by movements of oscillations or vibrations avoiding the sticking of the solidified crust on the cooled walls.
  • the metal strip or bar leaving the ingot mold then passes through a secondary cooling and guiding device which, in conventional installations, consists of plates or series of spaced apart rollers forming a passage of width equal to the thickness of the strip of metal cast and which are associated with a cooling system, for example by sprinkling of water, making it possible to complete the. cooling of the metal so that on leaving the cooling device, the solidification is complete.
  • a secondary cooling and guiding device which, in conventional installations, consists of plates or series of spaced apart rollers forming a passage of width equal to the thickness of the strip of metal cast and which are associated with a cooling system, for example by sprinkling of water, making it possible to complete the. cooling of the metal so that on leaving the cooling device, the solidification is complete.
  • the secondary cooling device is generally provided with extraction means, for example rollers which exert a traction on the metal strip in the casting direction to determine its progress.
  • extraction means for example rollers which exert a traction on the metal strip in the casting direction to determine its progress.
  • the continuous strip of metal can be. divided into plates or bars of desired length.
  • the liquid steel brought into a ladle is poured into an intermediate container provided with a nozzle making it possible to adjust the casting rate and the capacity of which makes it possible to ensure continuity of pouring when replacing an empty bag with a new one.
  • the outlet of the intermediate container is provided with a pouring tube which plunges inside the ingot mold so as to avoid the oxidation of the metal during casting.
  • the subject of the invention is a new installation which does not have these drawbacks and which in particular makes it possible to combine the advantages of the conventional casting technique in an ingot mold with those provided by the use of a casting wheel. ;
  • the ingot mold is supplied with liquid metal by means of a bottomless tank placed above the casting wheel, applied in a sealed manner to the latter, on its lateral sides and on the upstream side, in the direction of rotation of the wheel, and limited on the downstream side by a substantially vertical front wall whose lower edge is spaced from the casting wall by a space providing an outlet opening of the supply box opening into a casting cavity , bounded inward by the casting wall of the wheel and, outwardly, by a circular wall of rectangular section in the form of a portion of cylinder centered on the axis of the wheel and of radius greater than that of the casting wall at a distance equal to the thickness of the strip to be cast, said circular wall being associated with cooling means and constituting one of the longitudinal walls of the mold, the second longitudinal wall of which is formed by the partfacing the casting wall.
  • the feed tank has a rectangular section and is limited by four substantially vertical walls, respectively a rear wall and a cold wall parallel to the axis of the wheel and two side walls perpendicular to the axis, the rear wall and the side walls being applied in a sealed manner to the metal, respectively on the casting wall and on the lateral sides of the casting wheel.
  • the feed tank is advantageously provided with adjustable means for adjusting its relative position relative to the casting wall.
  • adjustable means can be constituted by adjustable shims bearing on a fixed chassis or by rollers mounted on an eccentric and rolling on circular tracks centered on the axis and formed on the two lateral sides of the casting wheel.
  • the circular wall of the mold comprises a contact plate of conductive metal constituting the internal face of the mold and fixed, on the outside, on an assembly plate inside which channels are formed. for circulating a coolant, the contact plate and the assembly plate being bent in the form of cylinders parallel to the casting wall.
  • the circular wall of the mold is provided, along its upstream side parallel to the axis of the wheel and turned towards the feed tank, with an elongated stud engaging in a corresponding groove formed in the base of the front wall of the. feed tank.
  • the circular wall of the mold is mounted on a frame bearing on a fixed frame or on circular tracks formed on the casting wheel, by means of support members adjustable in height and the transverse walls of the mold consists of curved blades in the shape of an arc of a circle centered on the axis of the wheel and applied against the lateral sides of the circular wall and of the casting wheel by pushing members bearing on said chassis .
  • the rear wall and the front wall of the feed tank are provided, along their lower edges facing the casting wall, with permeable parts made of porous material and are associated with means of insuff flation of a neutral gas through said permeable parts.
  • the permeable part placed at the base of the front wall consists of a lip parallel to the pouring pardi and constituting the lower edge of the groove in which the elongated tenon secured to the circular wall engages, l end of the tenon being spaced from the bottom of the groove by a hollow space into which opens.
  • a series of curved plates is used for this purpose in the form of cylinder portions parallel to the casting wall and each connected to a fixed frame by means of pushing the curved plate towards the casting wall with maintenance of a substantially constant spacing equal to the thickness of the casting strip.
  • the means for pushing the curved plates towards the pouring wall comprise, for each plate, two pairs of jacks directed in substantially radial directions and articulated on one side on a fixed frame and- on the other on the plate and the latter is associated with at least one cylinder-tangential displacement of the curved plate parallel to the casting wall.
  • the movements of the application and tangential displacement cylinders of the plate are controlled by a supply system comprising synchronization means successively determining the application of the curved plate against the strip, the tangential displacement of the curved plate in the direction of rotation of the wheel and at its speed, detachment from the bent plate and return from it to its initial position by tangential displacement.
  • the casting installation according to the invention generally comprises an ingot mold 1 continuously supplied with liquid steel by supply means 2 and inside which a metal strip 3 is formed which completes solidify in a secondary cooling device 4 also provided with means for extracting the strip.
  • a secondary cooling device 4 also provided with means for extracting the strip.
  • the cooling is carried out on the cylindrical peripheral wall of a casting wheel 5. After cooling, the strip of solidified metal can be directed directly to the rolling mills or to a device 6 d 'reel winding.
  • the steel supplied by a ladle not shown is poured into a dispensing container 21 containing a quantity of liquid steel 30 sufficient to ensure the continuity of the casting during the replacement of a ladle. empty by the next.
  • the steel is poured through one or more orifices 22, the distributor container 21 being able to supply several casting installations.
  • Each hole 22 is closed by a stopper or by a nozzle with drawers of conventional type, which has not been shown in the figure. It is thus possible to adjust the flow rate of the cast steel.
  • the orifice 22 is extended by a pouring tube 23 which protects the metal from oxidation. In conventional installations for casting billets or slabs, the pouring tube 23 penetrates inside the ingot mold with cooled walls.
  • the pouring tube 23 enters a supply tank i comprising a frame 71 internally covered with a refractory wall 72 inside which is formed a bottomless cavity 70 limited by two longitudinal walls 73 and 74 parallel to the axis -50 of the wheel and two transverse walls 75 perpendicular to the axis.
  • the longitudinal and transverse walls of the feed tank 3 can be heated by electrical resistances or by induction to a temperature sufficient to maintain the steel in the liquid state.
  • the casting wheel 5 is limited on its periphery by a cylindrical wall 51 centered on the axis 50 and made of conductive metal, for example steel coated externally , of copper.
  • Channels 52 are formed inside the wheel 5, along the internal face of the cylindrical wall 51 and are traversed by a heat transfer fluid such as water introduced by a supply system which is easy to design,
  • the longitudinal wall 73 of the supply box 7, placed on the upstream side in the direction of rotation of the wheel and the two transverse walls 75 are applied in leaktight manner. on the casting wheel while the front wall 74 placed on the downstream side remains spaced from the outer face of the circular wall 51 by a space of width e.
  • the two transverse walls 75 can be applied along the lateral flanks 53 limiting the casting wheel 5 on either side of the wall 51 and the supply box rests on a fixed frame 8 by means of adjustable support members 80 which make it possible to adjust the width of the space e.
  • These adjustable support members 80 can be simple shims of thickness or else rollers mounted on eccentrics - allowing a height adjustment.
  • rollers 80 could advantageously be supported on cylindrical tracks 54 formed on the casting wheel on either side of the lateral sides 53 and centered on the axis 50. This would certainly achieve the positioning of the tank feed with respect to the casting wheel whatever the deformations it may be. -
  • an extension 76 which extends parallel to the circular wall 51 and on which the ingot mold 1 is fixed.
  • the space of width e left between the lower edge of the downstream wall 74 and the circular wall 51 constitutes an outlet orifice 77 for the tank, for supply which opens into a casting cavity 10 inside which the metal strip is formed and therefore playing the role of the mold.
  • the liquid metal 31 contained in the supply tank 7 and which flows through the outlet orifice 77 begins to solidify along the cooled wall 51 of the casting wheel by forming a solidified crust 32 whose thickness gradually increases.
  • the casting wall 51 therefore constitutes the internal face of the ingot mold, the external face of which consists of a cooled circular wall 11.
  • the ingot mold 1 can be made in part of a similar to the molds used until now for the continuous casting of slabs.
  • the mold will therefore include a frame 12 on which are mounted the circular wall 11 constituting a longitudinal wall of the casting cavity and two side walls 13 (Fig. 4) in the form of blades curved in the form of arcs of circle centered on the axis 50 and which are applied against the sides of the circular wall 11 and the lateral flanks 53 of the casting wheel by thrust means 14 bearing on the chassis 12.
  • the latter can advantageously have an inverted U shape comprising a base 121 and two lateral legs 122 which are supported by means of positioning adjustable on the fixed frame 8 of the installation or, as already indicated for the supply tank 7, on circular tracks 54 provided on either side of the casting wheel 5.
  • the adjustable positioning means of the chassis 12 can also be simple shims or else rollers 123 mounted on eccentrics so as to adjust the height of the chassis 12 relative to the casting wheel, the chassis 12 being applied towards the wheel casting by thrust means 81 bearing on the fixed frame 8.
  • the circular wall 11 is produced in a similar manner to the walls of ingot molds for continuous casting of slabs. It thus includes, preferably, -a contact plate 111 made of metal conductor such as copper, forming the inner face of the flax g o-SPECT and attached outwardly on an assembly plate 112 in which are formed the channels 113 for circulating a coolant.
  • the assembly plate 112 can be made up of two parts; an internal part for supporting the contact plate 111 and an external part 114 in which the channels 113 are formed, the latter being connected, in a manner which is easy to design, to a system for circulating a heat-transfer fluid such as water to ensure intense cooling of the contact plate 111.
  • a second solidified crust 33 which, at the outlet of the mold 1, will constitute the outer wall of the. metal strip 3.
  • a solidified crust 34 also forms along the side walls 13 of the ingot mold 1 without the latter needing to be cooled. lie.
  • the still liquid steel is therefore, as in conventional continuous casting installations, completely enclosed in a solid crust which thickens as it advances along the casting wall 51.
  • the lower edge of the latter consists of a permeable element 78 of porous material which can be traversed by an inert gas blown under pressure by a pipe 731 formed inside the refractory wall 73 in contact with the permeable element 78.
  • This inert gas passes through the porous element 78 to escape, into the bath 31 according to the arrows indicated in the figure and it can also be heated at high temperature so as to avoid cooling of the lower part of the wall 73 along the cooled wall 51.
  • the extension 76 of the lower edge of the front wall 74, constituting the external face of the outlet orifice 77 of the supply tank, is replaced in part by a permeable element 79 of porous material through which is blown also an inert gas at high temperature. This avoids the premature cooling of the steel along the upper face 771 of the outlet orifice 77 and, consequently, the risk of wedge effect which, by premature solidification, could block the flow of l liquid steel 31 through the orifice 77 along the pouring wall 51.
  • the cooling of the upper part of the cast strip is further delayed so that the upper crust 33 only begins to form at a distance d from the upstream end of the wall 11.
  • the latter is provided with this effect of a head 15 extended downstream by a cradle 16 which becomes progressively thinner between the contact plate 111 and the cooled assembly plate 112, thereby constituting a brake on cooling.
  • the mold 1 is driven, by means well known in continuous casting, of oscillating movements in a tangential direction, or of vibrations transmitted by vibrators 13 interposed between the frame 12 and the circular wall 11.
  • the edge 15, which constitutes the upstream edge of the circular wall 1, further forms an elongated tenon 17 which fits into a groove 760 formed at the end of the extension 76 of the supply box 7 and forming a mortise.
  • the permeable element 79 advantageously forms a lip extending parallel to the casting wall 51 and constituting the lower edge of the groove 760.
  • a hollow space 761 into which a hot inert gas is injected via a channel 171 formed in the stud 17, supplied with gas under pressure and opening into the space hollow 761. The latter is sealed so that the inert gas passes through the element. permeable 79, as indicated by arrows in FIG. 2 and prevents the metal from sticking to the upper face of the orifice 77.
  • an oil mist can be injected between the opposite ends of the feed tank 7 and the ingot mold 1 by means of a channel 172 also formed in the stud 17 and opening into the joint plane.
  • the outlet edge of the wall 11 of the mold, as well as the upstream and downstream edges of the elements .40 which follow it, may be provided with combs, according to a arrangement known in conventional continuous casting machines.
  • the metal strip therefore forms without risk of wedge blocking between the parallel walls 51 and 11 of the casting cavity
  • the strip of cold metal is kept applied against the casting wall 51 which thus constitutes the internal face of a secondary cooling device 4 in which the solidification of the strip 3 is completed.
  • the secondary cooling device 4 consists of a series of elements 40 for applying the strip 3 against the casting wall 5.1 which also constitute means for extracting the bandaged.
  • each element 40 is constituted by a plate 41 provided with a concave internal face of cylindrical shape centered on the axis 50 of the wheel and of radius equal to that of the casting wall 51 plus the thickness e of the bandaged.
  • the contact plate 41 is mounted on a rigid support 40 advantageously provided with means for cooling the plate 41 by circulation of water similar to the cooling circuit of the mold,
  • the support element 40 is positioned and pressed against the strip by two pairs of application cylinders 421
  • the rod 420 of each cylinder is articulated on the support element 40 around axes parallel to the axis 50 of the casting wheel, while the body 42 is mounted at the end of an extension 43 which is itself articulated around axes parallel to the axis 50 of the wheel on a support frame 82 itself fixed on the fixed frame 8 or directly on the civil engineering.
  • each application element 40 is associated with at least one displacement cylinder. 44 extending in a tangential direction perpendicular to the mean radius of the contact plate 41 and articulated on the one hand on the frame 8 and on the other hand on the support element 40 about axes parallel to the axis of the casting wheel.
  • Each applicator element 40 is thus supported and angularly positioned by the jack 44, the jacks 42 additionally ensuring the application or detachment of the concave plate 41 on the strip.
  • the two sets of application cylinders 42 and displacement cylinders 44 are controlled by a supply circuit 9 associated with a synchronization system 90,
  • the application cylinders 44 are continuously supplied at reduced pressure on the side 421 of the cylinder chamber so as to ensure automatic detachment of the application element 40 as soon as the pressure on the side 422 is released.
  • the synchronization system 90 alternately controls the tangential displacements of the support element 40 in synchronism with its application and its detachment.
  • the synchronization system 90 controls simultaneously, via the servo-valves 91 and 92, respectively the application of the concave wall 41 on the strip and the tangential displacement of the element 40 in the direction of rotation. of the wheel over a short distance corresponding to the displacement of the jack.
  • the supply of the chambers 422 of the application cylinders. 42 is cut, which automatically determines the separation of the element 40 and, at the same time, the supply of the displacement cylinder 44 is reversed so as to control the ascent of the element 40 to its initial position.
  • the extraction of the strip 3 is thus determined at the speed of rotation of the casting wheel 5, the different elements 40, 45, 46 of the extraction device 4 being controlled in turn, by a sequential feeding system of. cylinders 42 of the various plates determining an alternating movement thereof.
  • Each element 40 is controlled in the same way and the synchronization system 90 determines an alternating movement of the application elements programmed by a sequential supply of the jacks. This movement completes the drive of the strip provided by the wheel (5).
  • the metal strip (3) therefore completes to solidify substantially over a half-turn of the casting wheel 5 and is then peeled off to be directed towards a rolling mill or else towards a winding device 6.
  • one of the advantages of the invention lies in the fact that by adapting them to casting on a wheel, it makes it possible to use the techniques already developed - in detail for the continuous casting of thick slabs important. Therefore, we can adapt to the installation according to the invention the various improvements already developed, in particular for the production of the mold which, for example, could 'be equipped with other provisions to ensure its cooling and oscillation or to promote its maintenance. Similarly, the embodiment according to the invention allows the use of accessory devices, for example to control the solidification process in the mold.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)
  • Soft Magnetic Materials (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

1. Continuous-casting machine for thin sheet metal, comprising a casting wheel (5) driven in rotation about a shaft (30), limited on its periphery by a casting wall (51) cylindrical in shape, centered on the shaft (50) and equipped with means (52) for cooling the casting wall (51), and a feed tank (7) into which the liquid metal is poured, the said tank (7) being applied tightly against the casting wheel (5) and equipped at its base, on the downstream side in the direction of rotation of the wheel (5), with an outlet orifice (77) opening out into a casting cavity (10) limited on one face by casting wall (51) of the wheel (5) and on the other by a circular wall (11) combined with cooling means (113) and having an inner face (111) in the shape of a portion of a cylinder centred on the shaft of the wheel and with a radius greater than that of the casting wall (51) by a distance equal to the thickness of the sheet to be cast, characterized in that the feed tank (7) comprises a bottomless cavity (70) with a rectangular section, limited by four substantially vertical walls, a longitudinal wall (73) placed on the upstream side in the direction of rotation of the wheel (5), two transverse walls (75) and a front wall (74) placed on the downstream side respectively and that the circular wall (11) consists of a separate element, fastened on the upstream side, to the base of the front wall (74) and followed, on the downstream side, by a secondary device (4) for guiding and cooling the cast sheet (3), comprising at least one circular plate (41) for application of the sheet (3) against the casting wall (51).

Description

L'invention a pour objet une installation de coulée continue de métal sur une rou-e de coulée, sous formé d'une- bande mince. On connaît depuis longtemps des installations de coulée continue d'acier sous forme de barres appelées billettes ou de plaques épaisses appelées brames.The subject of the invention is a continuous metal casting installation on a casting wheel, in the form of a thin strip. Installations for the continuous casting of steel have long been known in the form of bars called billets or thick plates called slabs.

Dans les installations de coulée ccontinue, la coulée se fait généralement dans un moule sans fond formant une lingotière à parois refroidies. L'arier coulé dans la lingotière et refroidi superficiellement le long des parois de celle-ci, est évacué par un orifice de sortie sous forme d'une barré ou d'une bande comprenant, à la sortie de la lingotière, une partie centrale encore liquide maintenue par une croûte, solidifiée. Généralement, la lingotière est animée 'de mouvements d'oscillations ou de vibrations évitant le collage de la croûte solidifiée sur les parois refroidies.In continuous casting installations, casting is generally done in a bottomless mold forming an ingot mold with cooled walls. The steel poured into the ingot mold and cooled superficially along the walls thereof, is evacuated by an outlet orifice in the form of a strikethrough or a strip comprising, at the outlet of the ingot mold, a central part still liquid maintained by a crust, solidified. Generally, the mold is animated by movements of oscillations or vibrations avoiding the sticking of the solidified crust on the cooled walls.

La bande ou barre de métal sortant de la lingotière passe alors dans un dispositif de guidage et de refroidissement secondaire qui, dans les installations classiques, est constitué de plaques ou de séries de rouleaux écartés formant un passage de largeur égale à l'épaisseur de la bande de métal coulée et qui sont associés à un système de refroidissement, par exemple par aspersion d'eau, permettant d'achever le. refroidissement du métal de telle sorte qu'à la sortie du dispositif de refroidissement, la solidification soit complète.The metal strip or bar leaving the ingot mold then passes through a secondary cooling and guiding device which, in conventional installations, consists of plates or series of spaced apart rollers forming a passage of width equal to the thickness of the strip of metal cast and which are associated with a cooling system, for example by sprinkling of water, making it possible to complete the. cooling of the metal so that on leaving the cooling device, the solidification is complete.

Err outre, le dispositif de refroidissement secondaire est muni généralement de moyens d'extraction, par exemple des rouleaux qui exercent une traction sur la bande de métal dans le sens de coulée pour déterminer son avancement. A la sortie du dispositif de refroidissement secondaire et d'extraction, la bande continue de métal peut être. divisée en plaques ou en barres de longueur voulue.Err also, the secondary cooling device is generally provided with extraction means, for example rollers which exert a traction on the metal strip in the casting direction to determine its progress. At the outlet of the secondary cooling and extraction device, the continuous strip of metal can be. divided into plates or bars of desired length.

Pour assurer l'a continuité de la coulée, l'acier liquide amené dans une poche, est déversé dans un récipient intermédiaire muni d'une busette permettant de régler le débit de coulée et dont la capacité permet d'assurer la continuité de la coulée lors du remplacement d'une poche vide par une nouvelle. L'orifice de sortie du récipient intermédiaire-est muni d'un tube de coulée qui plonge à l'intérieur de la lingotière de façon à éviter l'oxydation du métal pendant la coulée. En réglant le débit de sortie du récipient intermédiaire, on peut donc maintenir le niveau du métal dans la lingotière -à une hauteur sensiblement constante.To ensure continuity of the casting, the liquid steel brought into a ladle is poured into an intermediate container provided with a nozzle making it possible to adjust the casting rate and the capacity of which makes it possible to ensure continuity of pouring when replacing an empty bag with a new one. The outlet of the intermediate container is provided with a pouring tube which plunges inside the ingot mold so as to avoid the oxidation of the metal during casting. By adjusting the output flow of the intermediate container, it is therefore possible to maintain the level of the metal in the mold - at a substantially constant height.

Jusqu'à présent, les installations de ce type n'ont été utilisées industriellement que pour la réalisation de barres ou de bandes relativement épaisses. Lorsque l'on désire réaliser des bandes minces, de l'ordre de quelques millimètres par exemple, on est obligé de soumettre les brames à des laminages successifs, ce qui, évidemment, augmente le coût de production.Up to now, installations of this type have only been used industrially for the production of relatively thick bars or strips. When it is desired to produce thin strips, of the order of a few millimeters for example, one is obliged to subject the slabs to successive rolling, which, obviously, increases the production cost.

Différents systèmes de coulée continue de bandes minces ont été imaginés, mais jusqu'à présent, les difficultés présentées par l'opération n'ont pas permis de réaliser une véritable production industrielle.Different continuous casting systems for thin strips have been imagined, but so far, the difficulties presented by the operation have not made it possible to achieve real industrial production.

En particulier, on a déjà proposé d'injecter le métal liquide entr.e deux cylindres refroidis superficiellement --et entraînés en rotation de telle sorte que leurs parois refroidies en vis-à-vis se déplacent à la même vitesse et constituent ainsi les deux parois longitudinales d'une sorte de lingotière dont l'orifice de sortie serait constitué par l'espace ménagé entre les deux cylindres dans le plan passant par leurs axes. On peut ainsi réaliser la solidification superficielle du métal qui, lorsqu'il dépasse le plan des axes, se présente sous la forme d'une bande mince qui est alors décollée de l'un des cylindres et maintenue appliquée par différents moyens sur l'autre cylindre jusqu'à refroidissement complet. Une telle installation est décrite par exemple dans le brevet français - n° 69 4-5 157. Cette disposition présente des avantages- mais n'a pu se dévelapper industriellement. L'une des principales difficultés réside dans le fait que le métal durci entre les parois périphériques convergentes des deux cylindres forme une sorte de coin qui est soumis à un effet de laminage entre les parois des cylindres, ce qui entraîne une usure de celles-ci et une fatigue du dispositif qui n'est pas prévu normalement pour une telle opération de laminage.In particular, it has already been proposed to inject the molten metal between two superficially cooled cylinders - and driven in rotation so that their walls which are cooled opposite move at the same speed and thus constitute the two longitudinal walls of a kind of ingot mold whose outlet orifice would be formed by the space formed between the two cylinders in the plane passing through their axes. We can thus achieve the surface solidification of the metal which, when it exceeds the plane of the axes, is in the form of a thin strip which is then detached from one of the cylinders and kept applied by different means to the other cylinder until completely cooled. Such an installation is described for example in French patent - n ° 69 4-5 157. This arrangement has advantages - but could not be developed industrially. One of the main difficulties is that the hardened metal between the converging peripheral walls of the two cylinders form a sort of wedge which is subjected to a rolling effect between the walls of the cylinders, which causes wear of the latter and fatigue of the device which is not normally provided for such a rolling operation.

L'invention a pour objet une nouvelle installation ne présentant pas ces inconvénients et permettant notamment de combiner les avantages de la technique de coulée classique en lingotière avec ceux apportés par l'utilisation d'une roue de coulée. ; The subject of the invention is a new installation which does not have these drawbacks and which in particular makes it possible to combine the advantages of the conventional casting technique in an ingot mold with those provided by the use of a casting wheel. ;

Conformément à l'invention, la lingotière est alimentée en métal liquide au moyen d'une cuve sans fond placée au-dessus de la roue de coulée, appliquée de façon étanche sur celle-ci, sur ses côtés latéraux et du côté amont, dans le sens de rotation de la roue, et limitée du côté aval par une paroi frontale sensiblement verticale dont le bord inférieur est écarté de la paroi de coulée par un espace ménageant un orifice de sortie de la caisse d'alimentation débouchant dans une cavité de coulée, limitée vers l'intérieur par la -paroi de coulée de la roue et, vers l'extérieur, par une paroi circulaire de section rectangulaire en forme de portion de cylindre centrée sur l'axe de la roue et de rayon supérieur à celui de la paroi de coulée d'une distance égale à l'épaisseur de la bande à couler, ladite paroi circulaire étant associée à des moyens de refroidissement et constituant l'une des parois longitudinales de la lingotière dont la seconde paroi longitudinale est constituée par la partie en vis-à-vis de la paroi de coulée.In accordance with the invention, the ingot mold is supplied with liquid metal by means of a bottomless tank placed above the casting wheel, applied in a sealed manner to the latter, on its lateral sides and on the upstream side, in the direction of rotation of the wheel, and limited on the downstream side by a substantially vertical front wall whose lower edge is spaced from the casting wall by a space providing an outlet opening of the supply box opening into a casting cavity , bounded inward by the casting wall of the wheel and, outwardly, by a circular wall of rectangular section in the form of a portion of cylinder centered on the axis of the wheel and of radius greater than that of the casting wall at a distance equal to the thickness of the strip to be cast, said circular wall being associated with cooling means and constituting one of the longitudinal walls of the mold, the second longitudinal wall of which is formed by the partfacing the casting wall.

Dans un mode de réalisation préférentiel, la cuve d'alimentation a une section rectangulaire et est limitée par quatre parois sensiblement verticales, respectivement une paroi arrière et une paroi fro-ntale parallèles à l'axe de la roue et deux parois latérales perpendiculaires à l'axe, la paroi arrière et les parois latérales étant appliquées de façon étanche au métal, respectivement sur la paroi de coulée et sur les côtés latéraux de la roue de coulée.In a preferred embodiment, the feed tank has a rectangular section and is limited by four substantially vertical walls, respectively a rear wall and a cold wall parallel to the axis of the wheel and two side walls perpendicular to the axis, the rear wall and the side walls being applied in a sealed manner to the metal, respectively on the casting wall and on the lateral sides of the casting wheel.

La cuve d'alimentation est munie avantageusement de moyens réglables de réglage de sa position relative par rapport à la paroi de coulée. Ces moyens peuvent être constitués par des cales ajustables prenant appui sur un châssis fixe ou bien par des galets montés sur excentrique et roulant sur des pistes circulaires centrées sur l'axe et ménagées sur les deux côtés latéraux de la roue de coulée.The feed tank is advantageously provided with adjustable means for adjusting its relative position relative to the casting wall. These means can be constituted by adjustable shims bearing on a fixed chassis or by rollers mounted on an eccentric and rolling on circular tracks centered on the axis and formed on the two lateral sides of the casting wheel.

Selon une caractéristique essentielle, la paroi circulaire de la lingotière comprend une plaque de contact en métal conducteur constituant la- face interne de la lingotière et fixée, du côté extérieur, sur une plaque d'assemblage à l'intérieur de laquelle sont ménagés des canaux de circulation d'un fluide de refroidissement, la plaque de contact et la plaque d'assemblage étant cintrées en forme de cylindres parallèles à la paroi de coulée. En outre, la paroi circulaire de la lingotière est munie, le long de son côté amont parallèle à l'axe de la roue et tourné vers la cuve d'alimentation, d'un tenon allongé s'engageant dans une rainure correspondante ménagée à la base de la paroi frontale de la. cuve d'alimentation.According to an essential characteristic, the circular wall of the mold comprises a contact plate of conductive metal constituting the internal face of the mold and fixed, on the outside, on an assembly plate inside which channels are formed. for circulating a coolant, the contact plate and the assembly plate being bent in the form of cylinders parallel to the casting wall. In addition, the circular wall of the mold is provided, along its upstream side parallel to the axis of the wheel and turned towards the feed tank, with an elongated stud engaging in a corresponding groove formed in the base of the front wall of the. feed tank.

De préférence, la paroi circulaire de la lingotière est montée sur un châssis prenant appui sur un bâti fixe ou sur des pistes circulaires ménagées sur la roue de coulée, par l'intermédiaire d'organes d'appui réglables en hauteur et les parois transversales de la lingotière sont constituées par- des lames cintrées en forme d'arc de cercle centrées sur l'axe de la roue et appliquées contre les côtés latéraux de la paroi circulaire et de la roue de coulée par des organes de poussée prenant appui sur ledit châssis.Preferably, the circular wall of the mold is mounted on a frame bearing on a fixed frame or on circular tracks formed on the casting wheel, by means of support members adjustable in height and the transverse walls of the mold consists of curved blades in the shape of an arc of a circle centered on the axis of the wheel and applied against the lateral sides of the circular wall and of the casting wheel by pushing members bearing on said chassis .

Selon une autre caractéristique importante, la paroi arrière et la paroi frontale de la cuve d'alimentation sont munies, le long de leurs bords inférieurs tournés vers la paroi de coulée, de parties perméables réalisées en matière poreuse et sont associées à des moyens d'insufflation d'un gaz neutre à travers lesdites parties perméables.According to another important characteristic, the rear wall and the front wall of the feed tank are provided, along their lower edges facing the casting wall, with permeable parts made of porous material and are associated with means of insuff flation of a neutral gas through said permeable parts.

De façon avantageuse, la partie perméable placée à la base de la paroi frontale est constituée d'une lèvre parallèle à la pardi de coulée et constituant le bord inférieur de la rainure dans laquelle s'engage le tenon allongé solidaire de la paroi circulaire, l'extrémité du tenon étant écartée du fond de la rainure par un espace creux dans lequel débouche. au moins un canal ménagé à l'intérieur du tenon et relié à des moyens d'insufflation sous pression d'un gaz inerte dans ledit espace creux, ce dernier étant fermé de façon. étanche de telle sorte que le gaz inerte traverse la partie perméable.Advantageously, the permeable part placed at the base of the front wall consists of a lip parallel to the pouring pardi and constituting the lower edge of the groove in which the elongated tenon secured to the circular wall engages, l end of the tenon being spaced from the bottom of the groove by a hollow space into which opens. at least one channel formed inside the post and connected to means for blowing an inert gas under pressure into said hollow space, the latter being closed so. tight so that the inert gas passes through the permeable part.

Comme on l'a indiqué, la bande de métal coulée à sa sortie de la lingotière est maintenue appliquée sur là paroi de coulée jusqu'à solidification complète. Selon une autre caractéristique essentielle de l'invention, on utilise à cet effet une série de plaques cintrées en forme de portions de cylindre parallèles à la paroi de coulée et reliées chacune à un bâti fixe par des moyens de poussée de la plaque cintrée vers la paroi de coulée avec maintien d'un espacement sensiblement constant et égal à l'épaisseur de la bande coulée. De préférence, les moyens de poussée des plaques cintrées vers -la paroi de coulée comprennent, pour chaque plaque, deux paires de vérins dirigés suivant des directions sensiblement radiales et articulés d'un côté sur un bâti fixe et- de l'autre sur la plaque et cette dernière est associée à au moins un vérin-de déplacement tangentiel de la plaque cintrée parallèlement à la paroi de coulée. Les mouvements des vérins d'application et de déplacement tangentiel de la plaque sont commandés par- un système d'alimentation comprenant des moyens de synchronisation déterminant successivement l'application de la plaque cintrée contre la bande, le déplacement tangentiel de la plaque cintrée dans le sens de rotation de la roue et à la vitesse de celle-ci, le décollement de la plaque cintrée et le retour de celle-ci à sa position initiale par déplacement tangentiel.As indicated, the metal strip cast at its exit from the mold is kept applied to the casting wall until complete solidification. According to another essential characteristic of the invention, a series of curved plates is used for this purpose in the form of cylinder portions parallel to the casting wall and each connected to a fixed frame by means of pushing the curved plate towards the casting wall with maintenance of a substantially constant spacing equal to the thickness of the casting strip. Preferably, the means for pushing the curved plates towards the pouring wall comprise, for each plate, two pairs of jacks directed in substantially radial directions and articulated on one side on a fixed frame and- on the other on the plate and the latter is associated with at least one cylinder-tangential displacement of the curved plate parallel to the casting wall. The movements of the application and tangential displacement cylinders of the plate are controlled by a supply system comprising synchronization means successively determining the application of the curved plate against the strip, the tangential displacement of the curved plate in the direction of rotation of the wheel and at its speed, detachment from the bent plate and return from it to its initial position by tangential displacement.

Mais l'invention sera mieux comprise par la description suivante d'un mode de réalisation particulier, donné à titre d'exemple et représenté sur les dessins annexés.

  • - la figure 1 est une vue schématique de l'ensemble d'une installation selon l'invention, en coupe transversale à l'axe de la roue de coulée,
  • la- figure 2 est une vue en coupe transversale, à échelle agrandie, de la zone de formation de-la bande.
  • les figures 3 et 4 son-t des vues partielles de détail de la lingotière et de la caisse d'alimentation, respectivement en coupe selon les- lignes III-III et IV-IV de la figure 2 ;
  • - la figure 5 est une vue de détail schématique, en coupe longitudinale, d'un élément du dispositif de refroidissement secondaire.
However, the invention will be better understood from the following description of a particular embodiment, given by way of example and shown in the accompanying drawings.
  • FIG. 1 is a schematic view of the assembly of an installation according to the invention, in cross section to the axis of the casting wheel,
  • FIG. 2 is a cross-sectional view, on an enlarged scale, of the zone of formation of the strip.
  • Figures 3 and 4 are partial views of detail of the mold and the feed box, respectively in section along the lines III-III and IV-IV of Figure 2;
  • - Figure 5 is a schematic detail view, in longitudinal section, of an element of the secondary cooling device.

L'installation de coulée selon l'invention comprend, d'une façon générale, une lingotière 1 alimentée en continu en acier liquide par des moyens d'alimentation 2 et à l'intérieur de laquelle se forme une bande de métal 3 qui achève de se solidifier dans un dispositif de refroidissement secondaire 4 muni également de moyens d'extraction de la- bande. Selon une disposition connue pour la coulée de bandes minces, le refroidissement est effectué sur la paroi périphérique cylindrique d'une roue de coulée 5. Après refroidissement, la bande de métal solidifié peut êtra dirigée directement vers les laminoirs ou bien vers un dispositif 6 d'enroulement en bobine.The casting installation according to the invention generally comprises an ingot mold 1 continuously supplied with liquid steel by supply means 2 and inside which a metal strip 3 is formed which completes solidify in a secondary cooling device 4 also provided with means for extracting the strip. According to a known arrangement for the casting of thin strips, the cooling is carried out on the cylindrical peripheral wall of a casting wheel 5. After cooling, the strip of solidified metal can be directed directly to the rolling mills or to a device 6 d 'reel winding.

De façon classique dans la coulée continue, l'acier amené par- une poche de coulée non représentée est déversé dans un récipient distributeur 21 contenant une qnantité d'acier liquide 30 suffisante pour assurer la continuité de la coulée pendant le remglacement d'une poche vide par la suivante. La coulée de l'acier se fait par un ou plusieurs orifices 22, le récipient distributeur 21 pouvant alimenter plusieurs installations de coulée. Chaque orifice 22 est fermé par une quenouille ou par une busette à tiroirs de type classique, que l'on n'a pas représentée sur la figure. On peut ainsi régler le débit de l'acier coulé. L'orifice 22 est prolongé par un tube de coulée 23 qui protège le métal de l'oxydation. Dans- les installations classiques pour la coulée de billettes ou de brames, le tube de coulée 23 pénètre à l'intérieur de la lingotière à parois refroidies . Dans l'installation selon l'invention, le tube de coulée 23 pénètre dans une cuve d'alimentation i comprenant un châssis 71 recouvert intérieurement d'une paroi réfractaire 72 à l'intérieur de laquelle est ménagée une cavité sans -fond 70 limitée par deux parois longitudinales 73 et 74 parallèles à l'axe -50 de la roue et deux parois transversales 75 perpendiculaires à l'axe.Conventionally in continuous casting, the steel supplied by a ladle not shown is poured into a dispensing container 21 containing a quantity of liquid steel 30 sufficient to ensure the continuity of the casting during the replacement of a ladle. empty by the next. The steel is poured through one or more orifices 22, the distributor container 21 being able to supply several casting installations. Each hole 22 is closed by a stopper or by a nozzle with drawers of conventional type, which has not been shown in the figure. It is thus possible to adjust the flow rate of the cast steel. The orifice 22 is extended by a pouring tube 23 which protects the metal from oxidation. In conventional installations for casting billets or slabs, the pouring tube 23 penetrates inside the ingot mold with cooled walls. In the installation according to the invention, the pouring tube 23 enters a supply tank i comprising a frame 71 internally covered with a refractory wall 72 inside which is formed a bottomless cavity 70 limited by two longitudinal walls 73 and 74 parallel to the axis -50 of the wheel and two transverse walls 75 perpendicular to the axis.

Les parois longitudinales et transversales de la cuve d'alimentation 3 peuvent être chauffées par des résistances électriques ou par induction à une température suffisante pour maintenir l'acier à l'état liquide.The longitudinal and transverse walls of the feed tank 3 can be heated by electrical resistances or by induction to a temperature sufficient to maintain the steel in the liquid state.

Comme on l'a représenté en détail sur les figures 2, 3 et 4, la roue de coulée 5 est limitée sur sa périphérie par une paroi cylindrique 51 centrée sur l'axe 50 et réalisée en métal conducteur, par exemple en acier recouvert extérieurement, de cuivre. Des canaux 52 sont ménagés à l'intérieur de la roue 5, le long de la face interne de la paroi cylindrique 51 et sont parcourus par un fluide caloporteur tel que de l'eau introduit par un système d'alimentation facile à concevoir,As shown in detail in Figures 2, 3 and 4, the casting wheel 5 is limited on its periphery by a cylindrical wall 51 centered on the axis 50 and made of conductive metal, for example steel coated externally , of copper. Channels 52 are formed inside the wheel 5, along the internal face of the cylindrical wall 51 and are traversed by a heat transfer fluid such as water introduced by a supply system which is easy to design,

La paroi longitudinale 73 de la caisse d'alimentation 7, placé-e du côté amont dans le sens de rotation de- la roue et les deux parois transversales 75 sont appliquées de façon étanche. sur la roue de coulée alors que la parois frontale 74 placée du côté aval reste écartée de la face extérieure de la paroi circulaire 51 par un espace de largeur e. Comme on l'a représenté sur la figure 3, les deux parois transversales 75 peuvent être appliquées le long des flancs latéraux 53 limitant la roue de coulée 5 de part et d'autre de la paroi 51 et la caisse d'alimentation repose sur un bâti fixe 8 par l'intermédiaire d'organes d'appui réglables 80 qui permettent de régler la largeur de l'espace e. Ces organes d'appui réglables 80 peuvent être de simples cales d'épaisseur ou bien des galets montés sur excentriques- permettant un réglage de hauteur. Ces galets 80 pourraient avantageusement s'appuyer sur des pistes cylindriques 54 ménagées sur la roue de coulée de part et d'autre des côtés latéraux 53 et centrées sur l'axe 50. On réaliserait ainsi à coup sûr le positionnement de la cuve d'alimentation par rapport à la roue de coulée quelles que soient les déformations- éventuelles de celle-ci.- The longitudinal wall 73 of the supply box 7, placed on the upstream side in the direction of rotation of the wheel and the two transverse walls 75 are applied in leaktight manner. on the casting wheel while the front wall 74 placed on the downstream side remains spaced from the outer face of the circular wall 51 by a space of width e. As shown in FIG. 3, the two transverse walls 75 can be applied along the lateral flanks 53 limiting the casting wheel 5 on either side of the wall 51 and the supply box rests on a fixed frame 8 by means of adjustable support members 80 which make it possible to adjust the width of the space e. These adjustable support members 80 can be simple shims of thickness or else rollers mounted on eccentrics - allowing a height adjustment. These rollers 80 could advantageously be supported on cylindrical tracks 54 formed on the casting wheel on either side of the lateral sides 53 and centered on the axis 50. This would certainly achieve the positioning of the tank feed with respect to the casting wheel whatever the deformations it may be. -

A la basé de la paroi aval 74 de la cuve d'alimentation 7, est placé un prolongement 76 qui s'étend parallèlement à la-paroi circulaire 51 et sur lequel vient se fixer la lingotière 1.At the base of the downstream wall 74 of the feed tank 7, is placed an extension 76 which extends parallel to the circular wall 51 and on which the ingot mold 1 is fixed.

En effet, selon une caractéristique essentielle de l'invention, l'espace de largeur e laissé entre le bord inférieur de la paroi aval 74 et la paroi circulaire 51 constitue un orifice de sortie 77 de la cuve, d'alimentation qui débouche dans une cavité de coulée 10 à l'intérieur de laquelle se forme la bande de métal et jouant par conséquent le rôle de la lingotière. Comme on l'a représenté en détail sur la figure 2, le métal liquide 31 contenu dans la cuve d'alimentation 7 et qui s'écoule par l'orifice de sortie 77 commence à se solidifier le long de la paroi refroidie 51 de la roue de coulée en formant une croûte solidifiée 32 dont l'épaisseur augmente progressivement. La paroi de coulée 51 constitue donc la face interne de- la lingotière dont la face externe est constituée par une paroi circulaire refroidie 11. En effet, selon une autre caractéristique de l'invention, la lingotière 1 peut être constituée en partie d'une façon analogue aux lingotières utilisées jusqu'à présent pour la coulée continue de brames. La lingotière comprendra donc un châssis 12 sur lequel sont montées la paroi circulaire 11 constituant une paroi longitudinale de la cavité de coulée et- deux parois latérales 13 (Fig. 4) en forme de lames cintrées en forme d'arcs de cercle centrés sur l'axe 50 et qui sont appliquées contre les côtés de la paroi circulaire 11 et les flancs latéraux 53 de la roue de coulée par des moyens de poussée 14 prenant appui sur le châssis 12. Ce dernier peut avantageusement avoir une forme en U inversé comprenant une base 121 et deux jambes latérales 122 qui s'appuient par l'intermédiaire de moyens de positionnement réglables sur le bâti fixe 8 de l'installation ou bien, comme on l'a déjà indiqué pour la cuve d'alimentation 7, sur des pistes circulaires 54 ménagées de part et d'autre de la roue de coulée 5.Indeed, according to an essential characteristic of the invention, the space of width e left between the lower edge of the downstream wall 74 and the circular wall 51 constitutes an outlet orifice 77 for the tank, for supply which opens into a casting cavity 10 inside which the metal strip is formed and therefore playing the role of the mold. As shown in detail in Figure 2, the liquid metal 31 contained in the supply tank 7 and which flows through the outlet orifice 77 begins to solidify along the cooled wall 51 of the casting wheel by forming a solidified crust 32 whose thickness gradually increases. The casting wall 51 therefore constitutes the internal face of the ingot mold, the external face of which consists of a cooled circular wall 11. In fact, according to another characteristic of the invention, the ingot mold 1 can be made in part of a similar to the molds used until now for the continuous casting of slabs. The mold will therefore include a frame 12 on which are mounted the circular wall 11 constituting a longitudinal wall of the casting cavity and two side walls 13 (Fig. 4) in the form of blades curved in the form of arcs of circle centered on the axis 50 and which are applied against the sides of the circular wall 11 and the lateral flanks 53 of the casting wheel by thrust means 14 bearing on the chassis 12. The latter can advantageously have an inverted U shape comprising a base 121 and two lateral legs 122 which are supported by means of positioning adjustable on the fixed frame 8 of the installation or, as already indicated for the supply tank 7, on circular tracks 54 provided on either side of the casting wheel 5.

Les moyens de positionnement réglables du châssis 12 peuvent également être de simples cales d'épaisseur ou bien des galets 123 montés sur excentriques de façon à régler la hauteur du châssis 12 par rapport à la roue de coulée, le châssis 12 étant applique vers la roue de coulée par des moyens de poussée 81 prenant appui sur le bâti fixe 8.The adjustable positioning means of the chassis 12 can also be simple shims or else rollers 123 mounted on eccentrics so as to adjust the height of the chassis 12 relative to the casting wheel, the chassis 12 being applied towards the wheel casting by thrust means 81 bearing on the fixed frame 8.

Comme on l'a indiqué, la paroi circulaire 11 est réalisée d'une façon analogue aux parois de lingotières de coulée continue de brames. Elle comprend donc, de préférence, -une plaque de contact 111 en métal conducteur comme du cuivre, constituant la face interne de la lingo-tière et fixée vers l'extérieur sur une plaque d'assemblage 112 dans laquelle sont ménagés des canaux 113 de circulation d'un fluide de refroidissement. A cet effet, la plaque d'assemblage 112 peut être constituée en deux parties; une partie interne de support de la plaque de contact 111 et une partie externe 114 dans laquelle sont ménagés les canaux 113, ces derniers étant reliés, de façon facile à concevoir, à un système de circulation d'un fluide caloporteur tel que l'eau pour assurer le refroidissement intense de la plaque de contact 111.As indicated, the circular wall 11 is produced in a similar manner to the walls of ingot molds for continuous casting of slabs. It thus includes, preferably, -a contact plate 111 made of metal conductor such as copper, forming the inner face of the flax g o-SPECT and attached outwardly on an assembly plate 112 in which are formed the channels 113 for circulating a coolant. To this end, the assembly plate 112 can be made up of two parts; an internal part for supporting the contact plate 111 and an external part 114 in which the channels 113 are formed, the latter being connected, in a manner which is easy to design, to a system for circulating a heat-transfer fluid such as water to ensure intense cooling of the contact plate 111.

De la sorte, il se forme vers l'extérieur, le long de la plaque 111, une seconde croûte solidifiée 33 qui, à la sortie de la lingotière 1, constituera la paroi extérieure de la. bande de métal 3. Etant donné la faible épaisseur de cette dernière, une croûte solidifiée 34 se forme également le long des parois latérales 13 de la lingotière 1 sans que celle-ci ait besoin d'être refroi- lie. L'acier encore liquide est donc, comme dans les installations classiques de coulée continue, complètement enfermé dans une croûte solide qui s'épaissit au fur et à mesure de l'avancement le long de la paroi de coulée 51.In this way, it forms towards the outside, along the plate 111, a second solidified crust 33 which, at the outlet of the mold 1, will constitute the outer wall of the. metal strip 3. Given the small thickness of the latter, a solidified crust 34 also forms along the side walls 13 of the ingot mold 1 without the latter needing to be cooled. lie. The still liquid steel is therefore, as in conventional continuous casting installations, completely enclosed in a solid crust which thickens as it advances along the casting wall 51.

Pour que la solidification commence sur la roue et non pas sur la paroi réfractaire 73, le bord inférieur de celle-ci est constitué par un élément perméable 78 en matière poreuse qui peut être traversé par un gaz inerte insufflé sous pression par une canalisation 731 ménagée à l'intérieur de la paroi réfractaire 73 au contact de l'élément perméable 78. Ce gaz inerte traverse l'élément poreux 78 pour s'échapper, dans le bain 31 suivant les flèches indiquées sur la figure et il peut en outre être chauffé à haute-température de façon à éviter le refroidissement de la partie inférieure de la paroi 73 le long de la paroi refroidie 51.So that solidification begins on the wheel and not on the refractory wall 73, the lower edge of the latter consists of a permeable element 78 of porous material which can be traversed by an inert gas blown under pressure by a pipe 731 formed inside the refractory wall 73 in contact with the permeable element 78. This inert gas passes through the porous element 78 to escape, into the bath 31 according to the arrows indicated in the figure and it can also be heated at high temperature so as to avoid cooling of the lower part of the wall 73 along the cooled wall 51.

De même, le prolongement 76 du bord inférieur de la paroi frontale 74,constituant la face externe de l'orifice de sortie 77 de la cuve d'alimentation, est remplacé en partie par un élément perméable 79 en matière poreuse à travers lequel est insufflé également un gaz inerte à haute température. On évite ainsi le refroidissement prématuré de l'acier le long de la face supérieure 771 de l'orifice de sortie 77 et, par conséquent, le risque d'effet de coin qui, par une solidification prématurée, pourrait bloquer l'écoulement de l'acier liquide 31 par l'orifice 77 le long de la paroi de coulée 51.Similarly, the extension 76 of the lower edge of the front wall 74, constituting the external face of the outlet orifice 77 of the supply tank, is replaced in part by a permeable element 79 of porous material through which is blown also an inert gas at high temperature. This avoids the premature cooling of the steel along the upper face 771 of the outlet orifice 77 and, consequently, the risk of wedge effect which, by premature solidification, could block the flow of l liquid steel 31 through the orifice 77 along the pouring wall 51.

De façon avantageuse, on retarde encore lé refroidissement de la partie supérieure de la bande coulée de façon que la croûte supérieure 33 ne commence à se former qu'à une distance d de l'extrémité amont de la paroi 11. Cette dernière est munie à cet effet d'une tête 15 prolongée vers l'aval par un ber 16 qui s'interpose, en s'amincissant progressivement, entre la plaque de contact 111 et la plaque d'assemblage refroidie 112, en constituant ainsi un frein au refroidissement.Advantageously, the cooling of the upper part of the cast strip is further delayed so that the upper crust 33 only begins to form at a distance d from the upstream end of the wall 11. The latter is provided with this effect of a head 15 extended downstream by a cradle 16 which becomes progressively thinner between the contact plate 111 and the cooled assembly plate 112, thereby constituting a brake on cooling.

Par. ailleurs, pour éviter le collage de la croûte 33 sur la plaque de contact 111, la lingotière 1 est animée, par des moyens bien connus en coulée continue, de mouvements d'oscillation suivant une direction tangentielle, ou bien de vibrations transmises par des vibreurs 13 interposés entre le châssis 12 et la paroi circulaire 11.By. moreover, to avoid sticking of the crust 33 on the contact plate 111, the mold 1 is driven, by means well known in continuous casting, of oscillating movements in a tangential direction, or of vibrations transmitted by vibrators 13 interposed between the frame 12 and the circular wall 11.

La aête 15, qui constitue le bord amont de la paroi circulaire 1, forme en outre un tenon allongé 17 qui s'emboîte dans une raïnure 760 ménagée à l'extrémité du prolongement 76 de la caisse d'alimentation 7 et formant mortaise.The edge 15, which constitutes the upstream edge of the circular wall 1, further forms an elongated tenon 17 which fits into a groove 760 formed at the end of the extension 76 of the supply box 7 and forming a mortise.

Comme on l'a représenté sur la figure 2, l'élément perméable 79 forme avantageusement une lèvre s'étendant parallèlement à la paroi de coulée 51 et constituant le bord infèrieur .de la rainure 760. En outre, on ménage, entre l'extrémité du tenon 17 et le fond de la rainure 760, un espace creux 761 dans lequel on injecte un gaz inerte chaud par l'intermédiaire d'un canal 171 ménagé dans le tenon 17, alimenté en gaz sous pression et débouchant dans l'espace creux 761. Ce dernier est fermé de façon étanche, de telle sorte que le gaz inerte traverse l'élément. perméable 79, comme on l'a indiqué par des flèches sur la figure 2 et évite le collage du métal sur la face supérieure de l'orifice 77.As shown in FIG. 2, the permeable element 79 advantageously forms a lip extending parallel to the casting wall 51 and constituting the lower edge of the groove 760. In addition, between the end of the stud 17 and the bottom of the groove 760, a hollow space 761 into which a hot inert gas is injected via a channel 171 formed in the stud 17, supplied with gas under pressure and opening into the space hollow 761. The latter is sealed so that the inert gas passes through the element. permeable 79, as indicated by arrows in FIG. 2 and prevents the metal from sticking to the upper face of the orifice 77.

Pour diminuer encore le risque de collage, un brouillard d'huile peut être injecté entre les extrémités en regard de la cuve d'alimentation 7 et de la lingotière 1 au moyen d'un canal 172 ménagé également dans le tenon 17 et débouchant dans le plan de joint.To further reduce the risk of sticking, an oil mist can be injected between the opposite ends of the feed tank 7 and the ingot mold 1 by means of a channel 172 also formed in the stud 17 and opening into the joint plane.

Par ailleurs, pour assurer un meilleur supportage de la bande, le bord de sortie de la paroi 11 de la lingotière, de inême que les bords amont et aval des éléments .40 qui lui- font suite, peuvent être munis de peignes, selon une disposition connue dans les machines classiques de coulée continue.Furthermore, to ensure better support for the strip, the outlet edge of the wall 11 of the mold, as well as the upstream and downstream edges of the elements .40 which follow it, may be provided with combs, according to a arrangement known in conventional continuous casting machines.

La bande de métal se forme donc sans risque de blocage par-effet de coin entre les parois parallèles 51 et 11 de la cavité de coulée,The metal strip therefore forms without risk of wedge blocking between the parallel walls 51 and 11 of the casting cavity,

A la sortie de la lingotière 1, la bande de métal froid est maintenue appliquée contre la paroi de coulée 51 qui constitue ainsi la face interne d'un dispositif de refroidissement secondaire 4 dans lequel s'achève la solidification de la bande 3.At the outlet of the ingot mold 1, the strip of cold metal is kept applied against the casting wall 51 which thus constitutes the internal face of a secondary cooling device 4 in which the solidification of the strip 3 is completed.

Dans le mode de réalisation représenté sur la figure, le dispositif 4 de refroidissement secondaire est constitué d'une série d'éléments 40 d'application de la bande 3 contre- la paroi de coulée 5.1 qui constituent également des moyens d'extraction de la bande.In the embodiment shown in the figure, the secondary cooling device 4 consists of a series of elements 40 for applying the strip 3 against the casting wall 5.1 which also constitute means for extracting the bandaged.

En effet, chaque élément 40 est constitué par une plaque 41 munie d'une face interne concave de forme cylindrique centrée sur l'axe 50 de la roue et de rayon égal à celui de la paroi de coulée 51 plus l'épaisseur e de la bande. La plaque de contact 41 est montée sur un support rigide 40 muni avantageusement de moyens de refroidissement de la plaque 41 par circulation d'eau analogues au circuit de refroidissement de la lingotière,Indeed, each element 40 is constituted by a plate 41 provided with a concave internal face of cylindrical shape centered on the axis 50 of the wheel and of radius equal to that of the casting wall 51 plus the thickness e of the bandaged. The contact plate 41 is mounted on a rigid support 40 advantageously provided with means for cooling the plate 41 by circulation of water similar to the cooling circuit of the mold,

L' élément de support 40 -est positionné et pressé contre la bande par deux paires de vérins d'application 421 La tige 420 de chaque vérin est articulée sur l'élément de support 40 autour d'axes parallèles à l'axe 50 de la roue de coulée, alors que le corps 42 est monté à l'extrémité d'une rallonge 43 qui est articulée elle-même autour d'axes parallèles à l'axe 50 de la roue sur un châssis de support 82 lui-même fixé sur le bâti fixe 8 ou directement sur le génie civil.The support element 40 is positioned and pressed against the strip by two pairs of application cylinders 421 The rod 420 of each cylinder is articulated on the support element 40 around axes parallel to the axis 50 of the casting wheel, while the body 42 is mounted at the end of an extension 43 which is itself articulated around axes parallel to the axis 50 of the wheel on a support frame 82 itself fixed on the fixed frame 8 or directly on the civil engineering.

Par ailleurs, chaque élément d'application 40 est associé à au moins un vérin de déplacement. 44 s'étendant dans une direction tangentielle perpendiculaire au rayon moyen de la plaque de contact 41 et articulé d'une part sur le bâti 8 et d'autre part sur l'élément de support 40 autour d'axes parallèles àl'axe de la roue de coulée.Furthermore, each application element 40 is associated with at least one displacement cylinder. 44 extending in a tangential direction perpendicular to the mean radius of the contact plate 41 and articulated on the one hand on the frame 8 and on the other hand on the support element 40 about axes parallel to the axis of the casting wheel.

Chaque élément d'applica-tion 40 est ainsi supporté et positionné angulairement par le vérin 44, les vérins 42 assurant en outre l'application ou le décollement de la plaque concave 41 sur la bande. A cet effet, les deux ensembles de vérins d'application 42 et de déplacement 44 sont commandés par un circuit d'alimentation 9 associé à un système de synchronisation 90,Each applicator element 40 is thus supported and angularly positioned by the jack 44, the jacks 42 additionally ensuring the application or detachment of the concave plate 41 on the strip. To this end, the two sets of application cylinders 42 and displacement cylinders 44 are controlled by a supply circuit 9 associated with a synchronization system 90,

Les vérins d'application 44 sont alimentés en permanence à pression réduite du côté 421 de la chambre du vérin de façon à assurer le décollement automatique de l'élément d'application 40 dès que la pression du côté 422 est relâchée.The application cylinders 44 are continuously supplied at reduced pressure on the side 421 of the cylinder chamber so as to ensure automatic detachment of the application element 40 as soon as the pressure on the side 422 is released.

En effet, le système de synchronisation 90 commande alternativement les déplacements tangentiels de l'élément de support 40 en synchronisme avec son application et son décollement.Indeed, the synchronization system 90 alternately controls the tangential displacements of the support element 40 in synchronism with its application and its detachment.

La plaque de contact 41 étant décollée à l'origine, sous l'action des vérins 42 alimentés à pression réduite du côté 421, le système de synchronisation 90 commande simultanément, par l'intermédiaire des servo-valves 91 et 92, respectivement l'application de la paroi concave 41 sur la bande et le déplacement tangentiel de l'élément 40 dans le sens de rotation. de la roue sur une faible distance correspondant au déplacement du vérin. A la fin de ce déplacement, l'alimentation des chambres 422 des vérins d'application. 42 est coupée, ce qui détermine automatiquement _le décollement de l'élément 40 et, en même temps, l'alimentation du vérin 44 de déplacement est inversée de façon à commander la remontés de l'élément 40 à sa position initiale. On détermine ainsi l'extraction de la bande 3 à la vitesse de rotation de la roue de coulée 5, les différents éléments 40, 45, 46 du dispositif d'extraction 4 étant commandés à tour de rôle, par un système d'alimentation séquentiel des. vérins 42 des différentes plaques déterminant un-mouvement alterné de celles-ci.The contact plate 41 being detached at the origin, under the action of the jacks 42 supplied at reduced pressure from the side 421, the synchronization system 90 controls simultaneously, via the servo-valves 91 and 92, respectively the application of the concave wall 41 on the strip and the tangential displacement of the element 40 in the direction of rotation. of the wheel over a short distance corresponding to the displacement of the jack. At the end of this movement, the supply of the chambers 422 of the application cylinders. 42 is cut, which automatically determines the separation of the element 40 and, at the same time, the supply of the displacement cylinder 44 is reversed so as to control the ascent of the element 40 to its initial position. The extraction of the strip 3 is thus determined at the speed of rotation of the casting wheel 5, the different elements 40, 45, 46 of the extraction device 4 being controlled in turn, by a sequential feeding system of. cylinders 42 of the various plates determining an alternating movement thereof.

Bien entendu, le système de synchronisatien, facile à concevoir n'a été décrit que très schématiquement et doit être muni de moyens classiques pour limiter la pression d'application, déterminer la course de déplacement tangentiel, etc...Of course, the synchronizer system, easy to design, has only been described very schematically and must be provided with conventional means for limiting the application pressure, determining the tangential displacement stroke, etc.

Chaque élément 40 est commandé de la même façon et le système de synchronisation 90 détermine un mouvement alterné des éléments d'application programmé par une alimentation séquentielle des vérins. Ce mouvement complète l'entraînement de la bande assuré par la roue (5). La bande de métal (3) achève donc de se solidifier sensiblement sur un demi-tour de la roue de coulée 5 et est ensûite décollée pour être dirigée vers un laminoir ou bien vers un dispositif d'enroulement 6. A cet effet, on peut, à la sortie de là roue de coulée 5, installer un aiguillage, schématisé par un rouleau de déviation 61, et permettant de diriger la bande soit vers le laminoir sur une table à rouleaux 62, soit vers le dispositif d'enroulement 6, ce dernier pouvant être équipé de deux mandrins 63, 64 assurant la continuité de l'enroulement lorsque la bobine enroulée sur un premier mandrin atteint le poids requis.Each element 40 is controlled in the same way and the synchronization system 90 determines an alternating movement of the application elements programmed by a sequential supply of the jacks. This movement completes the drive of the strip provided by the wheel (5). The metal strip (3) therefore completes to solidify substantially over a half-turn of the casting wheel 5 and is then peeled off to be directed towards a rolling mill or else towards a winding device 6. For this purpose, it is possible to , at the outlet of the casting wheel 5, install a switch, shown schematically by a deflection roller 61, and making it possible to direct the strip either towards the rolling mill on a roller table 62, or towards the winding device 6, this the latter can be equipped with two mandrels 63, 64 ensuring the continuity of the winding when the coil wound on a first mandrel reaches the required weight.

Bien entendu, l'invention ne -se limite pas aux détails du mode de réalisation qui vient d'être décrit e-t qui pourrait faire l'objet de modifications, notamment par l'emploi de moyens équivalents, sans s'écarter du cadre de protection défini par les revendications.Of course, the invention is not limited to the details of the embodiment which has just been described and which could be subject to modifications, in particular by the use of equivalent means, without departing from the protective framework. defined by the claims.

En particulier, l'un des avantages de l'invention réside dans le fait qu'en les adaptant à la coulée sur roue, elle permet d'utiliser les techniques déjà mises au point- en détail pour la coulée continue de brames d'épaisseur importante. De ce fait, on pourra adapter à l'installation selon l'invention les différents perfectionnements déjà mis au point, notamment pour la réalisation de la lingotière qui, par exemple, pourrait 'être équipée d'autres dispositions pour assurer son refroidissement et son oscillation ou pour favoriser son entretien. De même, la réalisation selon l'invention permet d'utiliser des dispositifs accessoires, par exemple pour contrôler le processus de solidification dans la lingotière.In particular, one of the advantages of the invention lies in the fact that by adapting them to casting on a wheel, it makes it possible to use the techniques already developed - in detail for the continuous casting of thick slabs important. Therefore, we can adapt to the installation according to the invention the various improvements already developed, in particular for the production of the mold which, for example, could 'be equipped with other provisions to ensure its cooling and oscillation or to promote its maintenance. Similarly, the embodiment according to the invention allows the use of accessory devices, for example to control the solidification process in the mold.

Claims (13)

1. Installation de coulée continue de métal en bande mince, comprenant une lingotière (1) limitée par des parois refroidies ménageant une cavité de coulée de section rectangulaire, des moyens (2) d'alimentation en continu de la lingotière en métal liquide pour la formation, dans la lingotière (1), d'une bande de métal (3) solidifiée superficiellement et des moyens (4) d'extraction et de refroidissement secondaire de la bande de métal (3) comprenant une roue de coulée (5) entraînée en rotation autour d'un axe (50) dans le sens de coulée, munie sur sa périphérie d'une paroi de coulée refroidie (51) en forme de cylindre centré sur l'axe de rotation (50), ladite roue (5) étant associée à des moyens (40) d'application de la bande de métal (3) sur la paroi de coulée (51) jusqu'à solidification complète, la bande (3) étant ensuite écartée de la roue (5), caractérisée par le fait que les moyens (2) d'alimentation en métal liquide de la lingotière comprennent une cuve sans fond (7) placéeau-dessus de la roue de coulée (5) appliquée de façon étanche sur celle-ci sur ses côtés latéraux et du côté amont dans le sens de rotation de la roue (5) et limitée du côté aval par une paroi frontale (74) sensiblement verticale dont le bord inférieur (76) est écarté de la paroi de coulée par un espace ménageant un orifice (77) de sortie de la caisse d'alimentation (7) débouchant dans la cavité de coulée (10), cette dernière étant limitée vers l'extérieur par une paroi circulaire (11) de section rectangulaize, en forme de portion de cylindre centré sur l'axe de la roue et de rayon supérieur à celui de la paroi de coulée (51) d'une distance égale à l'épaisseur de la- bande à couler, ladite paroi circulaire (11) étant associée à des moyens (113) de refroidissement et constituant une paroi longitudinale de la lingotière (1) dont une seconde paroi longitudinale.est constituée par la partie en vis-à-vis de la paroi de coulée (51).1. Installation for continuous casting of metal in a thin strip, comprising an ingot mold (1) bounded by cooled walls providing a casting cavity of rectangular section, means (2) for continuous feeding of the ingot mold in liquid metal for the formation, in the ingot mold (1), of a metal strip (3) solidified on the surface and means (4) of extraction and secondary cooling of the metal strip (3) comprising a driven casting wheel (5) in rotation about an axis (50) in the direction of casting, provided on its periphery with a cooled casting wall (51) in the form of a cylinder centered on the axis of rotation (50), said wheel (5) being associated with means (40) for applying the metal strip (3) to the casting wall (51) until complete solidification, the strip (3) then being separated from the wheel (5), characterized by the fact that the means (2) for supplying molten metal to the ingot mold comprise a bottomless tank (7) above the casting wheel (5) applied in a sealed manner to the latter on its lateral sides and on the upstream side in the direction of rotation of the wheel (5) and limited on the downstream side by a substantially vertical front wall (74) the lower edge (76) of which is spaced from the casting wall by a space providing an orifice (77) for leaving the supply box (7) opening into the casting cavity (10), the latter being limited towards the exterior by a circular wall (11) of rectangular section, in the form of a portion of cylinder centered on the axis of the wheel and of radius greater than that of the casting wall (51) by a distance equal to the thickness of the strip to be cast, said circular wall (11) being associated with cooling means (113) and constituting a longitudinal wall of the mold (1), a second longitudinal wall of which is formed by the facing part pouring wall screw (51). 2. Installation de coulée continue selon la revendication 1, constituée par. le fait que la cuve d'alimentation (7) a une section rectangulaire et est limitée par quatre parois sensiblement verticales, respectivement une paroi arrière (73) et une paroi frontale (74) parallèles à l'axe de la roue et deux parois latérales (75) perpendiculaires à l'axe, la paroi arrière (73) et les parois latérales (75 ) étant appliquées de façon étanche au métal, respectivement sur la paroi de coulée(51) et sur les côtés làtéraux (53) de la roue de coulée (5).2. Continuous casting installation according to claim 1, constituted by. the fact that the ali tank mentation (7) has a rectangular section and is limited by four substantially vertical walls, respectively a rear wall (73) and a front wall (74) parallel to the axis of the wheel and two side walls (75) perpendicular to the axis, the rear wall (73) and the side walls (75) being applied in a sealed manner to the metal, respectively on the casting wall (51) and on the lateral sides (53) of the casting wheel (5). 3. Installation de coulée continue selon la revendication 1, caractérisée par le fait que la cuve d'alimentation (7) est munie de moyens réglables (80) de réglage de sa position relative par rapport à la paroi de coulée (51)3. Continuous casting installation according to claim 1, characterized in that the feed tank (7) is provided with adjustable means (80) for adjusting its relative position relative to the casting wall (51) 4. Installation de coulée continue selon la revendication 3, caractérisée par le fait que les moyens (80) de réglage de la position de la cuve d'alimentation sont constitués par des cales d'épaisseur ajustable prenant appui sur un bâti fixe (8).4. Continuous casting installation according to claim 3, characterized in that the means (80) for adjusting the position of the feed tank are constituted by shims of adjustable thickness bearing on a fixed frame (8) . 5. Installation de coulée continue selon la revendication 3, caractérisée par le fait que les moyens de réglage de la position de la caisse d'alimentation sont constitués par des galets (80) montés sur excentriques et-roulant -sur des pistes circulaires (54) centrées sur l'axe et ménagées de part et d'autre de la roue de coulée (5).5. Continuous casting installation according to claim 3, characterized in that the means for adjusting the position of the supply box are constituted by rollers (80) mounted on eccentric and rolling on circular tracks (54 ) centered on the axis and formed on either side of the casting wheel (5). 6. Installation de coulée continue selon l'une des revendications précédentes, caractérisée par le fait que la paroi- circulaire (11) de la lingotière (1) comprend une plaque de contact (111) en métal conducteur constituant la face interne de la. lingotière (1) et fixée, du côté extérieur, sur une plaque d'assemblage (112) à l'intérieur de laquelle sont ménagés des canaux (113) de circulation d'un fluide de refroidissement, la plaque de contact (111) et la plaque d'assemblage (112) étant cintrées en forme de cylindre parallèle à la paroi de coulée (51).6. Continuous casting installation according to one of the preceding claims, characterized in that the circular wall (11) of the mold (1) comprises a contact plate (111) of conductive metal constituting the internal face of the. ingot mold (1) and fixed, on the outside, on an assembly plate (112) inside which are formed channels (113) for circulation of a cooling fluid, the contact plate (111) and the assembly plate (112) being bent in the form of a cylinder parallel to the casting wall (51). 7. Installation de coulée continue selon la revendication 6, caractérisée par lé fait que la paroi circulaire (11) de la lingotière est munie, le long de son côté amont parallèle à l'axe de la roue (5) et tourné vers la caisse d'alimentation (7), d'un tenon allongé (17) s'engageant dans une rainure (760) correspondante ménagée à la base de la paroi frontale de la cuve d'alimentation (7).7. Continuous casting installation according to claim 6, characterized in that the circular wall (11) of the mold is provided, along its upstream side parallel to the axis of the wheel (5) and turned towards the body feed (7), an elongated tenon (17) engaging in a corresponding groove (760) formed at the base of the front wall of the feed tank (7). 8. Installation de coulée continue selon la revendication 2, caractérisée par le fait que la paroi arrière (73) et la paroi frontale (74) de la cuve d'alimentation (7) sont munies, le long de leur bord inférieur tourné vers la paroi de-coulée (51) de parties perméables (78,79) réalisées. en matière poreuses, et sont associées à des moyens (731,171) d'insufflation d'un gaz neutre à travers lesdites parties perméables (78,79).8. Continuous casting installation according to claim 2, characterized in that the rear wall (73) and the front wall (74) of the feed tank (7) are provided, along their lower edge facing the pouring wall (51) of permeable parts (78,79) produced. in porous material, and are associated with means (731,171) for blowing a neutral gas through said permeable parts (78,79). 9. Installation de coulée continue selon les revendications 7 et 8, caractérisée par le fait que la partie perméable (79) placée à la base de la paroi frontale (74) forme une lèvre parallèle à la paroi de coulée et constituant le bord inférieur de la rainure (760) dans laquelle s'engage le tenon allongé (17), l'extrémité de ce dernier étant écartée du fond de la rainure (760) par un espace creux (761) dans lequel débouche au moins un canal (171) ménagé à l'intérieur du tenon allongé (17) et relié à des moyens d'insufflation sous pression d'un gaz inerte dans ledit espace creux (761), ce dernier étant fermé de façon étanche de telle sorte que le gaz inerte traverse la partie perméable (79) vers -la cavité de coulée. (10).9. Continuous casting installation according to claims 7 and 8, characterized in that the permeable part (79) placed at the base of the front wall (74) forms a lip parallel to the casting wall and constituting the lower edge of the groove (760) into which the elongated tenon (17) engages, the end of the latter being spaced from the bottom of the groove (760) by a hollow space (761) into which opens at least one channel (171) formed inside the elongated post (17) and connected to means for blowing an inert gas under pressure into said hollow space (761), the latter being closed in leaktight manner so that the inert gas passes through the permeable part (79) towards the casting cavity. (10). 10. Installation de coulée continue selon la revendication 6, caractérisée par le fait que la paroi circulaire (11) de'la lingotièr.e (1) est-montée sur un châssis (12) prenant appui sur des pistes circulaires'(54) ménagées sur un bâti fixe (8) sur la roue de coulée (5), par l'intermédiaire d'organes d'appui (123) réglables en hauteur et. que les-parois transversales (75) de la lingotière (1) sont constituées par des lames cintrées (13) en forme d'arcs de cercles centrés sur l'axe de la roue et appliquées contre les côtés latéraux de la paroi circulaire (11) et de la roue de coulée (5) par des organes de poussée (14) prenant appui sur ledit châssis. (12).10. Continuous casting installation according to claim 6, characterized in that the circular wall (11) de'la ingotièr.e (1) is mounted on a frame (12) bearing on circular tracks' (54) formed on a fixed frame (8) on the casting wheel (5), by means of support members (123) adjustable in height and. that the transverse walls (75) of the mold (1) consist of curved blades (13) in the form of arcs of circles centered on the axis of the wheel and applied against the lateral sides of the circular wall (11 ) and the casting wheel (5) by thrust members (14) bearing on said chassis. (12). 11. Installation de coulée continué selon la revendi- chtion 1, caractérisée par le fait que les moyens (40) -d'application de la bande de métal (3) sur la paroi de coulée (51) sont constitués par une série de plaques (41) cintrées en forme de portion de cylindre parallèle à la paroi de coulée (51) et montées chacune sur un châssis-(40) relié à un bâti fixe (82) par des moyens (42) d'application de la plaque cintrée (41) vers la paroi de coulée (51) avec maintien d'un espacement sensiblement constant et égal à l'épaisseur de la bande coulée (3).11. Continuous casting installation as claimed chtion 1, characterized by the fact that the means (40) for applying the metal strip (3) to the casting wall (51) consist of a series of plates (41) bent in the shape of a cylinder portion parallel to the pouring wall (51) and each mounted on a chassis (40) connected to a fixed frame (82) by means (42) for applying the curved plate (41) to the casting wall (51 ) with maintenance of a substantially constant spacing equal to the thickness of the cast strip (3). 12. Installation de coulée-continue selon la revendication 11, caractérisée par le fait que les moyens d'application des plaques cintrées (41) vers la paroi de coulée (51) comprennent, pour chaque élément (40), deux paires de vérins (42) dirigés suivant des directions sensiblement radiales et dont le corps et la tige sont articulés respectivement su un bâti fixe (82) et sur l'élément (40), ce dernier étant associé à au moins un vérin (44) de déplacement tangentiel de la plaque cintrée (41) parallèlement à la paroi de coulée (51).12. continuous-casting installation according to claim 11, characterized in that the means for applying the curved plates (41) to the casting wall (51) comprise, for each element (40), two pairs of jacks ( 42) directed in substantially radial directions and the body and rod of which are articulated respectively on a fixed frame (82) and on the element (40), the latter being associated with at least one jack (44) for tangential displacement of the curved plate (41) parallel to the casting wall (51). 13, Installation de coulée continue selon la revendication 12, caractérisée par le fait que les vérins d'application (42) et le vérin (43) de déplacement tangentiel sont alimentés par un système (9) comprenant des moyens (90) de synchronisation déterminant successivement l'application de la plaque cintrée (4) contre la bande (3), le déplacement tangentiel de la plaque cintrée (41) dans le sens de rotation de la roue (5) et à la vitesse de celle-ci, le décollement de la plaque cintrée (41) et le retour de celle-ci à sa position initiale par déplacement tangentiel. -13, continuous casting installation according to claim 12, characterized in that the application cylinders (42) and the cylinder (43) of tangential movement are supplied by a system (9) comprising means (90) determining synchronization successively applying the curved plate (4) against the strip (3), the tangential movement of the curved plate (41) in the direction of rotation of the wheel (5) and at the speed thereof, detachment of the curved plate (41) and the return of the latter to its initial position by tangential displacement. -
EP86401134A 1985-05-28 1986-05-28 Continuous-casting machine for sheet metal Expired - Lifetime EP0206869B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86401134T ATE54588T1 (en) 1985-05-28 1986-05-28 CONTINUOUS CASTING MACHINE FOR THIN METAL STRIP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8507984 1985-05-28
FR8507984A FR2582551B1 (en) 1985-05-28 1985-05-28 CONTINUOUS CASTING OF THIN STRIP METAL

Publications (2)

Publication Number Publication Date
EP0206869A1 true EP0206869A1 (en) 1986-12-30
EP0206869B1 EP0206869B1 (en) 1990-07-18

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EP86401134A Expired - Lifetime EP0206869B1 (en) 1985-05-28 1986-05-28 Continuous-casting machine for sheet metal

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EP (1) EP0206869B1 (en)
AT (1) ATE54588T1 (en)
DE (1) DE3672702D1 (en)
ES (1) ES8705270A1 (en)
FR (1) FR2582551B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1611911A (en) * 1925-02-20 1926-12-28 Hazelett Storage Battery Compa Apparatus for casting sheet metal
US2139215A (en) * 1937-04-28 1938-12-06 Clinton I Wasson Method for forming zinc sheets
GB736401A (en) * 1952-03-17 1955-09-07 Brennan Joseph Barry Improvements in or relating to the continuous casting of materials

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU908493A1 (en) * 1980-06-09 1982-02-28 Государственный Научно-Исследовательский И Проектный Институт Сплавов И Обработки Цветных Металлов Continuous casting unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1611911A (en) * 1925-02-20 1926-12-28 Hazelett Storage Battery Compa Apparatus for casting sheet metal
US2139215A (en) * 1937-04-28 1938-12-06 Clinton I Wasson Method for forming zinc sheets
GB736401A (en) * 1952-03-17 1955-09-07 Brennan Joseph Barry Improvements in or relating to the continuous casting of materials

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED, Section Mechanical, semaine J51, 09 février 1983 (11298, J/51, M22, P53), Derwent Publications Ltd., Londres, GB; & SU - A - 908 493 (NON-FERR METAL ALLO) 28-02-1982 *

Also Published As

Publication number Publication date
FR2582551B1 (en) 1988-05-27
ATE54588T1 (en) 1990-08-15
EP0206869B1 (en) 1990-07-18
DE3672702D1 (en) 1990-08-23
FR2582551A1 (en) 1986-12-05
ES8705270A1 (en) 1987-05-01
ES555429A0 (en) 1987-05-01

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