EP0968778B1 - Device and method for continuous casting of hollow profiles - Google Patents

Device and method for continuous casting of hollow profiles Download PDF

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Publication number
EP0968778B1
EP0968778B1 EP99110102A EP99110102A EP0968778B1 EP 0968778 B1 EP0968778 B1 EP 0968778B1 EP 99110102 A EP99110102 A EP 99110102A EP 99110102 A EP99110102 A EP 99110102A EP 0968778 B1 EP0968778 B1 EP 0968778B1
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Prior art keywords
regions
workpiece
wall thickness
possess
produced
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EP99110102A
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German (de)
French (fr)
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EP0968778A1 (en
Inventor
Franz Dr. Gütlbauer
Hartmut Prof. Dr. Hoffmann
Andreas Dr. Pöllmann
Volker Prof. Dr. Thomas
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Daimler AG
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DaimlerChrysler AG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/055Cooling the moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/009Continuous casting of metals, i.e. casting in indefinite lengths of work of special cross-section, e.g. I-beams, U-profiles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/0406Moulds with special profile

Definitions

  • the invention relates to a device and a method for continuous casting of in their interior at least with a cavity having workpieces small, over the cross section changing wall thicknesses.
  • DE-PS 429 217 is a process for the preparation of pipes, wires, etc. known, which the known centrifugal casting with the well-known Extrusion method connects.
  • DE 31 50 684 C2 describes a semi-continuous Continuous casting process for metals with upward stripping strand.
  • Fig. 1 is a device 1 for continuous casting with a crucible 2, a filling device 3 and a mold 4 shown. From the mold 4 enters at its bottom through Continuously casting manufactured workpiece 5 or this is deducted by appropriate facilities.
  • melt 6 filled, which in this case by their own hydrostatic pressure via the filling device 3 enters the mold 4.
  • a pulsating pressure generator such as. a stamp or an extruder
  • the delivery of the Melt 6 thereby also take place in the horizontal direction. From the melt 6 is formed in the mold. 4 by solidification the workpiece 5.
  • the temperature control system 7 has coolant lines 8 and in the present case also heating cables 9.
  • the temperature control system 7 is intended, the melt 6 and the workpiece 5 to cool so that until the escape of Workpiece 5 at the bottom of the mold. 4 forms a uniform, symmetrical solidification front and no distortion of the workpiece 5 is formed. Much more this occurs straight from the mold. 4 out.
  • the workpiece 5, which is formed by a cavity 10 in the mold 4, has in its cross-section areas 11 with a larger wall thickness d 1 and areas 12 with a smaller wall thickness d 2 .
  • areas 11 with greater wall thicknesses d 1 there are more coolant lines 8 than in the areas 12 with the smaller wall thickness d 2 , where, if appropriate, heating lines 9 can also be located.
  • the regions 11 with the larger wall thicknesses d 1 require a longer solidification time than the regions 12 with the smaller wall thicknesses d 2 .
  • the coolant lines 8 and the heating cables 9 must be arranged and matched to one another so that the workpiece 5 uniformly solidifies. However, for example, in the regions 11 on the walls to the mold 4, a faster solidification will still occur than in the middle of the regions 11, so that the solidification front will run here in the manner of a parabola.
  • the workpiece 5 is a one Hollow profile with a recess in its interior, why the mold 4 is also a se known mandrel 13 which also with Coolant lines 8 and possibly with heating cables 9 is provided. Instead of the mandrel 13 could alternatively also a well-known bridge matrix be provided. These could also be with coolant lines 8 and optionally provided with heating cables 9 his.
  • the coolant lines 8 in the areas 11 with greater wall thickness d 1 have a larger diameter than the coolant lines 8 in the areas 12 with a smaller wall thickness d 2 .
  • An adaptation of the volume flow in the coolant lines 8 and the heating cables 9 to the necessary cooling of the workpiece 5 is possible.
  • the regions 11 of the workpiece 5 with the larger wall thickness d 1 are cooled more strongly than the regions 12 of the workpiece 5 with the smaller wall thickness d 2 .
  • the uniformly solidifying layer of the workpiece 5 that results at the lower edge of the molding tool 4 workpieces 5 of any desired cross section can be produced by the molding tool 4, in particular with different wall thicknesses varying over the cross section and with at least one cavity in its inner region.
  • FIG. 3 shows a further exemplary embodiment of the molding tool 4 with coolant lines 8, which here has different heights or lengths in order to take into account the different solidification times due to the different wall thicknesses d 1 and d 2 of the workpiece 5.
  • the cavity 10 and the mandrel 13 of the mold 4 in Fig. 3 is not shown.
  • the mold 4 has a greater height h 1 than in the areas 12 with the smaller wall thickness d 2 , where the mold 4 only has the height h 2 .
  • an inflow region 14 is provided in the filling device 3, the height h 3 of which corresponds to the difference between the height h 1 of the higher regions 11 and the height h 2 of the shallower regions 12.

Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Stranggießen von in ihrem Innenbereich zumindest einen Hohlraum aufweisenden Werkstücken mit geringen, über den Querschnitt sich verändernden Wandstärken.The invention relates to a device and a method for continuous casting of in their interior at least with a cavity having workpieces small, over the cross section changing wall thicknesses.

Aus der DE 195 29 931 C1 ist eine Plattenkokille zur Erzeugung von Strängen aus Stahl bekannt, bei welcher die Breitseitenwände mindestens drei nebeneinander liegende und voneinander unabhängige Kühlsegmente aufweisen. Hierdurch soll es möglich sein, eine differenzierte Aussage über den partiellen Wärmestrom über die Kokillenbreite zu machen.From DE 195 29 931 C1 is a plate mold for Production of steel strands known in which the broad side walls at least three next to each other have lying and independent cooling segments. This should make it possible, a differentiated Statement about the partial heat flow over the Mold width to make.

Die DE 32 04 339 A1 beschreibt eine Stranggußkokille zum Gießen von Trägerrohlingen, welche mit Kühlmittelleitungen versehen ist.DE 32 04 339 A1 describes a continuous casting mold for casting carrier blanks, which with coolant lines is provided.

Eine weitere Vorrichtung sowie ein entsprechendes Verfahren sind aus der DE-OS 26 50 016 bekannt. Bei diesem als Extrudieren bezeichneten Verfahren wird aus einem flüssigen Metall in einem Formwerkzeug, in diesem Fall als Extrudiermatrize bezeichnet, als Werkstück ein Endlosstrang abgezogen.Another device and a corresponding method are known from DE-OS 26 50 016. In this The process referred to as extruding is made a liquid metal in a mold, in this Case referred to as Extrudiermatrize, as a workpiece an endless strand deducted.

Aus der DE-PS 429 217 ist ein Verfahren zur Herstellung von Rohren, Drähten usw. bekannt, welches das bekannte Schleudergußverfahren mit dem ebenfalls bekannten Strangpreßverfahren verbindet.From DE-PS 429 217 is a process for the preparation of pipes, wires, etc. known, which the known centrifugal casting with the well-known Extrusion method connects.

Des weiteren beschreibt die DE 31 50 684 C2 ein halbkontinuierliches Stranggießverfahren für Metalle mit nach oben abzuziehendem Strang. Durch das dort beschriebene, sehr komplizierte Verfahren soll sichergestellt werden, daß sich auch aus komplexen Legierungen seigerungsfreie Stränge ausgezeichneter Qualität bei hoher Produktionsleistung herstellen lassen.Furthermore, DE 31 50 684 C2 describes a semi-continuous Continuous casting process for metals with upward stripping strand. By the one described there, very complicated procedures should be ensured that are also made of complex alloys segregation-free strands of excellent quality high production output.

Durch sämtliche der oben beschriebenen Verfahren und Vorrichtungen ist es nachteiligerweise nicht möglich, Werkstücke mit komplizierten Querschnitten, welche insbesondere unterschiedliche Dicken aufweisen, durch Stranggießen herzustellen.Through all of the methods described above and Devices are disadvantageously not possible Workpieces with complicated cross sections, which in particular, have different thicknesses, through To produce continuous casting.

Die Verfahren Stranggießen und Strangpressen sind außer aus den oben genannten Schriften auch aus dem allgemeinen Stand der Technik bekannt. Um beliebige, je nach Verwendungszweck teilweise recht komplizierte Profile herzustellen, wird meist ein Halbzeug durch Stranggießen hergestellt und anschließend durch Strangpressen in die endgültige Form gebracht.The processes continuous casting and extrusion are out of the question from the above-mentioned writings also from the general Known in the art. Any, ever according to purpose partly quite complicated Producing profiles is usually a semi-finished by Continuous casting and then by Extruders brought into the final shape.

Der hohe Fertigungsaufwand und die damit verbundenen hohen Kosten dieses Verfahrens und der dabei verwendeten Vorrichtungen sind jedoch sehr nachteilig.The high production costs and the associated high cost of this process and the one used However, devices are very disadvantageous.

Es ist daher Aufgabe der vorliegenden Erfindung, eine Vorrichtung und ein Verfahren zum Stranggießen zu schaffen, mit welchen auch Werkstücke von kompliziertem Querschnitt mit unterschiedlichen, über den Querschnitt sich verändernden Dicken bzw. Wandstärken hergestellt werden können.It is therefore an object of the present invention to provide a Apparatus and method for continuous casting create, with which also workpieces of complicated Cross section with different, across the cross section made of varying thicknesses or wall thicknesses can be.

Erfindungsgemäß wird diese Aufgabe durch die in Anspruch 1 genannten Merkmale gelöst.According to the invention this object is achieved by the claim 1 mentioned features solved.

Eine verfahrensmäßige Lösung ergibt sich aus den in Anspruch 9 genannten Merkmalen.A procedural solution results from the in Claim 9 mentioned features.

Durch die erfindungsgemäße Auslegung des Temperierungssystems des Formwerkzeugs können nunmehr Bereiche des herzustellenden Werkstücks mit größerer Wandstärke stärker gekühlt werden und Bereiche mit geringerer Wandstärke können weniger stark gekühlt oder sogar beheizt werden. Dadurch ist es möglich, Werkstücke mit beliebigem, insbesondere mit kompliziertem Querschnitt durch Stranggießen herzustellen, da die Erstarrungsfront, also der Bereich in dem die Schmelze in das fertige Werkstück übergeht, trotz der unterschiedlichen Wandstärken nunmehr gleichmäßig über den Querschnitt verteilt ist. Man könnte auch von einem symmetrisch Verlauf der Erstarrungsfront über den Querschnitt sprechen, bei dem das Mittel der zuletzt erstarrenden Bereiche sich in der Art einer Kraftresultierenden im Mittelpunkt des Werkstücks befindet..Vorteilhafterweise tritt nunmehr der gegossene Strang geradlinig aus dem Formwerkzeug aus. Due to the inventive design of Temperierungssystems of the mold can now areas of the workpiece to be produced with greater wall thickness be cooled more and areas with lesser Wall thickness can be cooled less or even less be heated. This makes it possible to workpieces with Any, especially with a complicated cross-section by continuous casting, since the solidification front, So the area where the melt in the finished workpiece passes, despite the different Wall thicknesses now evenly across the cross section is distributed. You could also think of a symmetrical Course of the solidification front over the cross section speak, in which the means of the last solidifying Areas are in the nature of a force-resultant located in the center of the workpiece .. Advantageously now comes the cast strand straight from the mold.

Die bisherige Problematik, daß Bereiche mit größerer Wandstärke eine längere Erstarrungszeit haben als Bereiche mit geringerer Wandstärke und dadurch sehr starker Verzug an dem aus der Kokille austretenden Strang auftreten würde, ist somit nicht mehr gegeben.The previous problem that areas with larger Wall thickness have a longer solidification time than areas with a smaller wall thickness and therefore very strong distortion on the emerging from the mold Strand would occur, is thus no longer given.

Durch das erfindungsgemäße Verfahren ist es möglich, auf das Strangpressen zu verzichten, das bisher zusätzlich zum Stranggießen notwendig war, um Werkstücke mit komplizierteren Querschnitten herzustellen.By the method according to the invention it is possible to dispense with the extruding, so far in addition for continuous casting was necessary to workpieces produce with more complicated cross sections.

Eine vorteilhafte Ausführungsform der Erfindung geht aus den Unteransprüchen 2 bis 4 hervor.An advantageous embodiment of the invention is from the dependent claims 2 to 4.

Durch das Anpassen der Anzahl bzw. des Durchmessers der Kühlmittelleitungen bzw. der Heizleitungen ergibt sich eine einfache konstruktive Umsetzung der erfindungsgemäßen Auslegung des Temperierungssystems.By adjusting the number or diameter the coolant lines and the heating cables results a simple structural implementation of the invention Design of the temperature control system.

Eine alternative Möglichkeit der Ausführung des erfindungsgemäßen Temperierungssystems des Formwerkzeugs ergibt sich aus den Unteransprüchen 5 und 6.An alternative way of carrying out the invention Temperature control system of the mold arises from the subclaims 5 and 6.

Durch die geringere Höhe bzw. Länge des Formwerkzeugs in den Werkstückbereichen mit geringerer Wandstärke ergibt sich eine geringere wirksame Höhe des Temperierungssystems, welches somit einen geringeren Kühleffekt in den Bereichen mit geringerer Wandstärke des herzustellenden Werkstücks erzeugt.Due to the lower height or length of the mold in the workpiece areas with a smaller wall thickness results in a lower effective height of the tempering system, which thus a lower cooling effect in the areas with lower wall thickness of produced workpiece produced.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den weiteren Unteransprüchen und aus dem nachfolgend anhand der Zeichnung prinzipmäßig dargestellten Ausführungsbeispiel.Further advantageous embodiments of the invention emerge from the other dependent claims and from in the following with reference to the drawing in principle Embodiment.

Es zeigt:

Fig. 1
die erfindungsgemäße Vorrichtung zum Stranggießen in einer stark schematisierten Darstellung;
Fig. 2
eine erste Ausführungsform des erfindungsgemäßen Formwerkzeugs im Schnitt nach der Linie II-II aus Fig. 1; und
Fig. 3
eine zweite Ausführungsform des erfindungsgemäßen Formwerkzeugs in einer Vorderansicht.
It shows:
Fig. 1
the inventive apparatus for continuous casting in a highly schematic representation;
Fig. 2
a first embodiment of the mold according to the invention in section along the line II-II of Fig. 1; and
Fig. 3
a second embodiment of the mold according to the invention in a front view.

Gemäß Fig. 1 ist eine Vorrichtung 1 zum Stranggießen mit einem Schmelztiegel 2, einer Einfülleinrichtung 3 und einem Formwerkzeug 4 dargestellt. Aus dem Formwerkzeug 4 tritt an dessen Unterseite ein durch Stranggießen hergestelltes Werkstück 5 aus bzw. dieses wird durch geeignete Einrichtungen abgezogen.According to Fig. 1 is a device 1 for continuous casting with a crucible 2, a filling device 3 and a mold 4 shown. From the mold 4 enters at its bottom through Continuously casting manufactured workpiece 5 or this is deducted by appropriate facilities.

In den Schmelztiegel 2 wird an dessen Oberseite Schmelze 6 eingefüllt, welche in diesem Fall durch ihren eigenen hydrostatischen Druck über die Einfülleinrichtung 3 in das Formwerkzeug 4 gelangt. In nicht dargestellter Art und Weise wäre es auch möglich, die Schmelze 6 über einen pulsierenden Druckerzeuger, wie z.B. einen Stempel oder einen Extruder, dem Formwerkzeug 4 zuzuführen. Dies wäre insbesondere dann sinnvoll, wenn höhere Preßkräfte erforderlich wären. In beiden Fällen könnte die Zuführung der Schmelze 6 dabei auch in horizontaler Richtung erfolgen. Aus der Schmelze 6 entsteht in dem Formwerkzeug 4 durch Erstarrung das Werkstück 5.In the crucible 2 is at the top Melt 6 filled, which in this case by their own hydrostatic pressure via the filling device 3 enters the mold 4. In it would not be possible to the melt 6 via a pulsating pressure generator, such as. a stamp or an extruder, to supply the mold 4. This would be particular then makes sense if higher pressing forces required would. In both cases, the delivery of the Melt 6 thereby also take place in the horizontal direction. From the melt 6 is formed in the mold. 4 by solidification the workpiece 5.

Fig. 2 zeigt einen Schnitt durch das Formwerkzeug 4, welches in an sich bekannter Weise mit einem Temperierungssystem 7 versehen ist. Das Temperierungssystem 7 weist Kühlmittelleitungen 8 und im vorliegenden Fall auch Heizleitungen 9 auf. Das Temperierungssystem 7 ist dafür vorgesehen, die Schmelze 6 bzw. das Werkstück 5 so abzukühlen, daß sich bis zum Austreten des Werkstücks 5 an der Unterseite des Formwerkzeugs 4 eine gleichmäßige, symmetrische Erstarrungsfront bildet und kein Verzug des Werkstücks 5 entsteht. Vielmehr tritt dieses geradlinig aus dem Formwerkzeug 4 aus.2 shows a section through the mold 4, which in a conventional manner with a Temperierungssystem 7 is provided. The temperature control system 7 has coolant lines 8 and in the present case also heating cables 9. The temperature control system 7 is intended, the melt 6 and the workpiece 5 to cool so that until the escape of Workpiece 5 at the bottom of the mold. 4 forms a uniform, symmetrical solidification front and no distortion of the workpiece 5 is formed. Much more this occurs straight from the mold. 4 out.

Das Werkstück 5, welches durch einen Hohlraum 10 in dem Formwerkzeug 4 gebildet wird, weist in seinem Querschnitt Bereiche 11 mit einer größeren Wandstärke d1 und Bereiche 12 mit einer geringeren Wandstärke d2 auf. In den Bereichen 11 mit größeren Wandstärken d1 befinden sich mehr Kühlmittelleitungen 8 als in den Bereichen 12 mit der geringeren Wandstärke d2, wo sich gegebenenfalls auch Heizleitungen 9 befinden können.The workpiece 5, which is formed by a cavity 10 in the mold 4, has in its cross-section areas 11 with a larger wall thickness d 1 and areas 12 with a smaller wall thickness d 2 . In the areas 11 with greater wall thicknesses d 1, there are more coolant lines 8 than in the areas 12 with the smaller wall thickness d 2 , where, if appropriate, heating lines 9 can also be located.

Dies ist der Fall, weil die Bereiche 11 mit den größeren Wandstärken d1 eine längere Erstarrungszeit benötigen als die Bereiche 12 mit den geringeren Wandstärken d2. Die Kühlmittelleitungen 8 und die Heizleitungen 9 müssen so angeordnet und aufeinander abgestimmt sein, daß das Werkstück 5 gleichmäßig erstarrt. Es wird jedoch beispielsweise in den Bereichen 11 an den Wänden zu dem Formwerkzeug 4 noch immer zu einer schnelleren Erstarrung kommen als in der Mitte der Bereiche 11, so daß die Erstarrungsfront hier in der Art einer Parabel verlaufen wird. Am Ausgang aus dem Formwerkzeug 4 ist zumindest die äußere Schale des Werkstücks 5 erstarrt, es kann jedoch bereits im Formwerkzeug 4 ein vollständig durcherstarrtes Werkstück 5 vorliegen.This is the case because the regions 11 with the larger wall thicknesses d 1 require a longer solidification time than the regions 12 with the smaller wall thicknesses d 2 . The coolant lines 8 and the heating cables 9 must be arranged and matched to one another so that the workpiece 5 uniformly solidifies. However, for example, in the regions 11 on the walls to the mold 4, a faster solidification will still occur than in the middle of the regions 11, so that the solidification front will run here in the manner of a parabola. At the exit from the mold 4, at least the outer shell of the workpiece 5 is solidified, but it can already be present in the mold 4, a completely solidified workpiece 5.

Bei dem Werkstück 5 handelt es sich hierbei um ein Hohlprofil mit einer Aussparung in seinem Innenbereich, weshalb das Formwerkzeug 4 auch einen an sich bekannten Dorn 13 aufweist, welcher ebenfalls mit Kühlmittelleitungen 8 und gegebenenfalls mit Heizleitungen 9 versehen ist. Statt des Dorns 13 könnte alternativ auch eine ebenfalls bekannte Brückenmatrize vorgesehen sein. Auch diese könnte mit Kühlmittelleitungen 8 und gegebenenfalls mit Heizleitungen 9 versehen sein.The workpiece 5 is a one Hollow profile with a recess in its interior, why the mold 4 is also a se known mandrel 13 which also with Coolant lines 8 and possibly with heating cables 9 is provided. Instead of the mandrel 13 could alternatively also a well-known bridge matrix be provided. These could also be with coolant lines 8 and optionally provided with heating cables 9 his.

In einem nicht dargestellten Ausführungsbeispiel kann auch vorgesehen sein, daß die Kühlmittelleitungen 8 in den Bereichen 11 mit größerer Wandstärke d1 einen größeren Durchmesser aufweisen als die Kühlmittelleitungen 8 in den Bereichen 12 mit geringerer Wandstärke d2. Auch eine Anpassung des Volumenstroms in den Kühlmittelleitungen 8 bzw. den Heizleitungen 9 an die notwendige Kühlung des Werkstücks 5 ist möglich.In one embodiment, not shown, it may also be provided that the coolant lines 8 in the areas 11 with greater wall thickness d 1 have a larger diameter than the coolant lines 8 in the areas 12 with a smaller wall thickness d 2 . An adaptation of the volume flow in the coolant lines 8 and the heating cables 9 to the necessary cooling of the workpiece 5 is possible.

Durch die beiden beschriebenen Anordnungen werden die Bereiche 11 des Werkstücks 5 mit der größeren Wandstärke d1 stärker gekühlt als die Bereiche 12 des Werkstücks 5 mit der geringerer Wandstärke d2. Durch die sich am unteren Rand des Formwerkzeuges 4 ergebende gleichmäßig erstarrende Schicht des Werkstücks 5 können durch das Formwerkzeug 4 Werkstücke 5 mit beliebigem Querschnitt hergestellt werden, insbesondere mit unterschiedlichen, sich über den Querschnitt verändernden Wandstärken und mit zumindest einem Hohlraum in ihrem Innenbereich.As a result of the two arrangements described, the regions 11 of the workpiece 5 with the larger wall thickness d 1 are cooled more strongly than the regions 12 of the workpiece 5 with the smaller wall thickness d 2 . As a result of the uniformly solidifying layer of the workpiece 5 that results at the lower edge of the molding tool 4, workpieces 5 of any desired cross section can be produced by the molding tool 4, in particular with different wall thicknesses varying over the cross section and with at least one cavity in its inner region.

Fig. 3 zeigt eine weiteres Ausführungsbeispiel des Formwerkzeugs 4 mit Kühlmittelleitungen 8, welches hier verschiedene Höhen bzw. Längen aufweist, um die unterschiedlichen Erstarrungszeiten durch die unterschiedlichen Wandstärken d1 und d2 des Werkstücks 5 zu berücksichtigen. Aus Übersichtlichkeitsgründen ist der Hohlraum 10 und der Dorn 13 des Formwerkzeugs 4 in Fig. 3 nicht dargestellt. In den Bereichen 11 (nicht dargestellt) mit der größeren Wandstärke d1 des herzustellenden Werkstücks 5 weist das Formwerkzeug 4 eine größere Höhe h1 auf als in den Bereichen 12 mit der geringeren Wandstärke d2, wo das Formwerkzeug 4 lediglich die Höhe h2 aufweist. In den Bereichen 12 mit niedrigerer Höhe h2 ist in der Einfülleinrichtung 3 ein Einfließbereich 14 vorgesehen, dessen Höhe h3 der Differenz zwischen der Höhe h1 der höheren Bereiche 11 und der Höhe h2 der flacheren Bereiche 12 entspricht.3 shows a further exemplary embodiment of the molding tool 4 with coolant lines 8, which here has different heights or lengths in order to take into account the different solidification times due to the different wall thicknesses d 1 and d 2 of the workpiece 5. For clarity, the cavity 10 and the mandrel 13 of the mold 4 in Fig. 3 is not shown. In the areas 11 (not shown) with the larger wall thickness d 1 of the workpiece 5 to be produced, the mold 4 has a greater height h 1 than in the areas 12 with the smaller wall thickness d 2 , where the mold 4 only has the height h 2 , In the regions 12 with a lower height h 2 , an inflow region 14 is provided in the filling device 3, the height h 3 of which corresponds to the difference between the height h 1 of the higher regions 11 and the height h 2 of the shallower regions 12.

Bei Werkstücken 5 mit sehr komplizierten Querschnitten können sich selbstverständlich noch weitere Höhendifferenzen der entsprechenden Bereiche ergeben, so daß letztendlich ein Formwerkzeug 4 mit einer vollständig an das Werkstück 5 angepaßten Kontur entsteht.For workpieces 5 with very complicated cross sections Of course, there may be further height differences the corresponding areas, so that ultimately a mold 4 with a complete adapted to the workpiece 5 contour arises.

In den Bereichen 11 ergibt sich somit eine stärkere Kühlung durch die Kühlmittelleitungen 8 als in den Bereichen 12, die aufgrund ihrer geringen Höhe h2 auch kürzere Kühlmittelleitungen 8 aufweisen.In the areas 11, there is thus greater cooling through the coolant lines 8 than in the areas 12, which also have shorter coolant lines 8 due to their small height h 2 .

Somit ist auch durch dieses Formwerkzeug 4 die Herstellung von Werkstücken 5 mit beliebigen Querschnitten durch Stranggießen möglich, und es muß nicht wie bisher ein zusätzlicher Arbeitsschritt, nämlich das Strangpressen, durchgeführt werden.Thus, the production is also by this mold 4 of workpieces 5 with arbitrary cross sections possible by continuous casting, and it does not have to be like that so far an additional step, namely the Extrusions, be performed.

Selbstverständlich ist es auch möglich, sowohl unterschiedliche Höhen des Formwerkzeugs 4 als auch die oben beschriebene Verteilung der Kühlmittelleitungen 8 und der Heizleitungen 9 miteinander in einem Formwerkzeug 4 zu kombinieren.Of course it is also possible, both different Heights of the mold 4 and the Distribution of the coolant lines 8 described above and the heating cables 9 together in a mold 4 to combine.

Claims (9)

  1. Apparatus (1) for the continuous casting of workpieces (5) having at least one cavity in their inner region and possessing small wall thicknesses varying over the cross section, with a crucible (2), with a filling device (3) and with a moulding die (4) which is provided with a thermal control system (7), the thermal control system (7) of the moulding die (4) being designed in such a way that regions (11) of the workpiece (5) to be produced which possess a greater wall thickness (d1) can be cooled to a greater extent, and in such a way that regions (12) of the workpiece (5) to be reduced which possess a smaller wall thickness (d2) can be cooled to a lesser extent and/or can be heated.
  2. Apparatus according to Claim 1, characterized in that the thermal control system (7) of the moulding die (4) has coolant lines (8) and, if appropriate, heating lines (9).
  3. Apparatus according to Claim 2, characterized in that a larger number of coolant lines (8) are provided in the regions (11) of the workpiece (5) to be produced which possess a greater wall thickness (d1) than in the regions (12) of the workpiece (5) to be produced which possess a smaller wall thickness (d2).
  4. Apparatus according to Claim 2, characterized in that the coolant lines (8) have a larger diameter in the regions (11) of the workpiece (5) to be produced which possess a greater wall thickness (d1) than in the regions (12) of the workpiece (5) to be produced which possess a smaller wall thickness (d2), or in that heating lines (9) are provided in the regions (12) of the workpiece (5) to be produced which possess a smaller wall thickness (d2).
  5. Apparatus according to Claim 1 or 2, characterized in that the moulding die (4) is designed with a greater height (h1) in the regions (11) of the workpiece (5) to be produced which possess a greater wall thickness (d1) than in the regions (12) of the workpiece (5) to be produced which possess the smaller wall thickness (d2).
  6. Apparatus according to Claim 5, characterized in that the filling device (3) has provided in it, in the regions (12) possessing a lower height (h2), an inflow region (14), the height (h3) of which corresponds to the difference between the height (h1) of the higher regions (11) and the height (h2) of the flatter regions (12).
  7. Apparatus according to one of Claims 1 to 6, characterized in that the moulding die (4) has a mandrel (13) which is provided with coolant lines (8) and, if appropriate, heating lines (9).
  8. Apparatus according to one of Claims 1 to 7, characterized in that, for feeding the melt (6) into the moulding die (4), the hydrostatic pressure of the melt (6) and/or a pulsating plunger and/or an extruder is provided.
  9. Method for continuous casting of workpieces (5) having at least one cavity in their inner region and possessing small wall thicknesses varying over the cross section, a crucible (2) being fed with a melt (6) which is introduced into a moulding die (4) provided with a thermal control system (7), in the moulding die (4) regions (11) of the workpiece (5) to be produced which possess a greater wall thickness (d1) being cooled to a greater extent and regions (12) of the workpiece (5) to be produced which possess a smaller wall thickness (d2) being cooled to a lesser extent and/or being heated.
EP99110102A 1998-05-28 1999-05-25 Device and method for continuous casting of hollow profiles Expired - Lifetime EP0968778B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823797 1998-05-28
DE19823797A DE19823797A1 (en) 1998-05-28 1998-05-28 Apparatus and method for continuous casting of workpieces

Publications (2)

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EP0968778A1 EP0968778A1 (en) 2000-01-05
EP0968778B1 true EP0968778B1 (en) 2004-12-01

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EP99110102A Expired - Lifetime EP0968778B1 (en) 1998-05-28 1999-05-25 Device and method for continuous casting of hollow profiles

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EP (1) EP0968778B1 (en)
DE (2) DE19823797A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10031844A1 (en) * 2000-06-30 2002-01-10 Sms Demag Ag Continuous casting mold comprises a copper plate fitting the progress of the casting cross-section for a profiled casting cross-section with holes for coolant in the casting direction and collection holes opening out into water tanks
DE102006024778B3 (en) 2006-03-02 2007-07-19 J. Eberspächer GmbH & Co. KG Static mixer for exhaust system of internal combustion engine, has flow conducting surfaces arranged at web materials so that surfaces are arranged with cells at their diverting side and extend in direction of flow in tube
WO2008007715A1 (en) * 2006-07-14 2008-01-17 Asahi Glass Company, Limited Liquid crystal optical device and process for manufacturing the same
EP1918042A1 (en) * 2006-10-10 2008-05-07 Concast Ag Mould for continuous casting of pre-profiled billets
JP4829830B2 (en) * 2007-03-29 2011-12-07 株式会社青木科学研究所 Oil-based lubricant for forging, forging method and coating apparatus
DE102015009920A1 (en) 2015-07-30 2016-01-28 Daimler Ag Vessel for a metallic melt

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE429217C (en) * 1924-03-30 1926-05-21 Jose Merle Process for the production of pipes, wires, etc.
DE1900882A1 (en) * 1969-01-09 1970-08-20 Schloemann Ag Mandrel for casting metallic hollow bars
US3987655A (en) 1975-11-10 1976-10-26 Myotte Robert J Method of continuously transforming solid non-ferrous metal into elongated extruded shapes
US4308908A (en) * 1980-01-15 1982-01-05 Gus Sevastakis Methods and apparatus for effecting quick mandrel changes in continuous casting operations
JPS57134243A (en) * 1981-02-10 1982-08-19 Nippon Steel Corp Mold for casting beam blank
AT374709B (en) * 1982-03-23 1984-05-25 Uralsky Politekhn Inst SEMI-CONTINUOUS CONTINUOUS CASTING METHOD
EP0225523B1 (en) * 1985-11-30 1989-11-15 Akio Nakano Molding die for use in casting
AT389251B (en) * 1987-12-23 1989-11-10 Voest Alpine Ind Anlagen COOLING OF A CONTINUOUS CASTING CHILL
US5404932A (en) * 1990-10-17 1995-04-11 Outokumpu Castform Oy Apparatus and method for intensifying cooling in the casting of metal objects
AT396439B (en) * 1991-05-13 1993-09-27 Sommerhuber Franz Apparatus for permanent-mould casting of sections of large dimensions, in particular hollow sections, from light alloy
US5213149A (en) * 1991-10-10 1993-05-25 Cmi International, Inc. Mold and method for making variable thickness cast articles
DE19529931C1 (en) * 1995-08-02 1997-04-03 Mannesmann Ag Plate mold for the production of steel strands
US5771958A (en) * 1995-09-14 1998-06-30 Ag Industries, Inc. Mold for continuous casting system
DE19549275C1 (en) * 1995-12-27 1997-04-30 Mannesmann Ag Concasting mould for making profile sections

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DE19823797A1 (en) 1999-12-09
US6401800B1 (en) 2002-06-11
DE59911163D1 (en) 2005-01-05
EP0968778A1 (en) 2000-01-05

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