DE1235516B - Mold holder for centering a flow of metal in a vertical continuous casting device - Google Patents

Description

GERMAN ^ 7 ¥ W PATENT OFFICE

EDITORIAL

German class: 31 b2 -11/10

Number: 1235 516

File number: O 8929 VI a / 31 b2

1 235 516 Filing date: August 13, 1962

Open date: March 2, 1967

The invention relates to a mold holder for centering a pouring crucible, Funnel od. The like. Exiting metal stream on the center of the cross-sectional area of the displaceable Molds of a vertical continuous caster.

In most of the known, vertical continuous casting processes for cast metals, In particular steel, the molten metal is or from a suitable crucible. The like. In a funnel Poured in from durable material. An outflow opening is arranged at its bottom, which the molten metal in a continuous stream as vertically as possible into an ordinary lets flow in water-cooled form with an open end. In this form the metal gets through Cooling brought to solidify on the outer wall. The cast partially solidified in this way is continuously withdrawn from the lower end of the mold. When the molten metal gets into the When the shape occurs, it is extremely important that the stream of metal leaving the funnel is in the geometric Center of (for example) having a circular or square cross-section Opening the mold drops to ensure that the cooling is as symmetrical as possible. Nevertheless, a damaged outlet opening and any turbulence phenomena can widen the metal flow and deflect it by flowing down at an angle from the center of the shape.

It is possible, by means of suitable movements of the funnel in the horizontal, to prevent these undesirable To correct phenomena even during pouring. This known solution for centering of the metal flow is only satisfactory as long as it is for machines for the production of a single one Continuous casting is used.

In machines in which two or more strands come from one and the same crucible at the same time or funnel flow, an additional task must be solved, namely the distribution of the metal flow on the individual forms. If this distribution by using a larger funnel for the purpose of covering the additional forms, it is no longer possible to use the known above-mentioned method to correct each metal stream separately, which simultaneously flows from this funnel to the various shapes.

It is also known to carry out an individual adjustment by arranging a separate, horizontally adjustable one Funnel over any shape. Nevertheless, the mold holder is used to center a stream of metal in a vertical continuous caster

Applicant:

Erik Allan Olsson, Küsnacht, Zurich (Switzerland)
Representative:

Dr.-Ing. H. Fincke, Dipl.-Ing. H. Bohr
and Dipl.-Ing. S. Staeger, patent attorneys,
Munich 5, Müllerstr. 31

Named as inventor:

Franz Ruckstuhl, Uster, Zurich (Switzerland)

it is necessary to use a device to distribute the metal flow to the various funnels To provide this funnel and below the crucible, for example a pivoting channel for the double metal flow and distribution channels with outlets and closures for multiple strand casting. There are difficulties for each distribution facility, which the economic Question the feasibility of such a multiple continuous casting device. Above all, lead the known solutions to an extension of the path from the metal stream to the crucible and the different forms must be passed, what the temperature drop and the oxidation of the metal elevated. The number of funnels made of resistant material must also be increased, which is more Requires energy for the heating and thus reduces the economic efficiency of the process.

It is therefore the object of the invention to overcome the shortcomings and disadvantages of the known methods and switch off device for multiple continuous casting and an economically working mold holder to accomplish.

The object is achieved in that, according to the invention, the individual molds of a double or Mehrfachstranggießanlage are arranged to be displaceable, with the displacement of a mold takes place along a spherical surface, the center of which is an extension of the center line of the mold lies.

Since the path described by the metal flow in the mold holder according to the invention is relative is far, the above-mentioned disadvantages of known mold holders of a multiple continuous caster do not apply.

709 517/421

Claims (4)

A modification of the invention is that the center point lies in the plane of the drive rollers. Furthermore, it can be advantageous that a drive device which can be deflected together with the mold is provided for the vertical back and forth movement of the mold during casting. It can also be expedient if the cooling device for a strand emerging from the mold can be deflected together with the mold. Further details of the inventive concept emerge from the description and the drawings. It shows F i g. 1 shows the upper section of a continuous caster in section along the line 1-1 of FIG. 2 and F i g. Fig. 2 is a section along the line 2-2 of Fig. 1. The liquid metal flows down from a crucible 4 into a funnel 5 and from there through an outlet 6 as stream 7 into an open-ended mold 8, which is known per se is. The partially or completely solidified casting 3 in the mold 8 is drawn by driven rollers 24. Under normal conditions, the current 7 contacts the metal surface 9 in the center 10 of the mold cross-section. The drive unit 11, which communicates a vertical, reciprocating movement to the mold, has in the embodiment shown a frame 12, a piston 13, a cylinder 14 and a main frame 15, the latter being provided with supports 16 which are on supports 17 rest, which in turn are firmly connected to the machine bed 18. The surfaces of the carrier 16 and the supports 17, which are in contact with one another, have a spherical shape with a common radius 20 and a center point 21 which lies on an extension of the center line of the mold 22, at the level of a line 23 passing through the upper pair of drive rollers 24 extend. The spherical surface 25, which is determined by the radius 20 and is only shown one-dimensionally in FIG. 1, coincides with the contact surfaces 19, which are concave on the supports 16 and convex on the supports 17. The device for subsequent cooling 26, which is usually arranged on these machines, is arranged with its guide rollers 27 in a flexible or fixed manner on the main frame 15 by means of links 28 or the like. If a subsequent centering of the stream 7 is necessary in order to bring it to the center 10, this is achieved by deflecting the mold 8 and its entire drive unit 11 with the aid of an adjusting device 29. The cooling device follows this adjustment movement, the result being a position that is correct in relation to the center line of the mold. The invention is not limited to the mold holder described for example, but can also be implemented with other devices in which the casting is moved relative to the mold. Patent claims: 1. Mold holder for centering a metal stream emerging from a pouring crucible, funnel or the like onto the center of the cross-sectional area of displaceable molds of a vertical continuous casting device, characterized in that the individual molds (8) of a double or multiple continuous caster are arranged to be displaceable for themselves, with a mold is displaced along a spherical surface (25) , the center point (21) of which lies in an extension of the center line of the mold. 2. Mold holder according to claim 1, characterized in that the center point (21 ) lies in the plane (23) of the drive rollers (24). 3. Mold holder according to claims 1 or 2, characterized in that a drive device (11, 12, 13, 14) which can be deflected together with the mold is provided for the vertical back and forth movement of the mold during casting. 4. Mold holder according to Claims 1 to 3, characterized in that the cooling device (26) can be deflected together with the mold for a strand emerging from the mold. Considered publications:
"Excerpts from German patent applications", Vol. 19, p. 663, file number W 116007 VIa / 31 c. 1 sheet of drawings 709 517/421 2.67 © Bundesdruckerei Berlin