Metal founding – Means to shape metallic material – Continuous or semicontinuous casting
Patent
1986-06-17
1987-09-15
Batten, Jr., J. Reed
Metal founding
Means to shape metallic material
Continuous or semicontinuous casting
164482, B22D 1106
Patent
active
046932950
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for continuous casting, in which the melted material is fed into a recess that runs along the outer periphery of a casting wheel in the direction of the circumference of said wheel, said recess being open to the outside in a radial direction, the material hardening in part in this recess during the rotational movement of the casting wheel, before the casting that is so formed is removed from the recess by means of a band that closes off in the direction of the circumference, at least partially, the recess that is filled with the material, said band pressing against the casting wheel.
In a known device of this kind the band consists of an endless steel strip that passes over three guide rollers. One of these three guide rollers is mounted in such a manner as to render it movable and is subject to a force such that there is a specific tension in the steel strip.
This tension is essential in order to generate the pressure of the steel band against the casting wheel. However, because of the high temperature of the melted material and the large amount of tension that is involved, the steel strip is subjected to considerable loads, with the result that it wears very rapidly and thus has to be replaced very frequently.
Thus, it is the task of the present invention to create a casting device of the type described in the introduction hereto, in which the amount of wear on the band is considerably reduced.
According to the present invention, this task has been solved in that a separate pressure element is provided, this being behind the band so as to press the band against the casting wheel. This pressure element consists preferably of a rotating chain. This chain and the band can pass over three guide rollers, of which two are used jointly by the chain and by the band. In an advantageous configuration at least one of the guide rollers for the chain is installed so as to be movable and subjected to a force that generates tension in the chain.
The present invention will be described below on the basis of an exemplary version illustrated in the drawings appended hereto. These drawings are as follows:
FIG. 1: A continuous casting device in principle, in a side view;
FIG. 2: A section on the line II--II in FIG. 1, perpendicular to the plane of the drawing.
The installation that is shown in the drawings permits continuous casting and, combined with an associated rolling plant, makes it possible to produce a finished product such as steel rod, simple profiles, or rolled wire continuously from the melt heat of the molten steel. This continuous operation of a casting installation in conjunction with a rolling plant results in a considerable reduction in costs.
In known manner, the installation comprises a tundish 1 filled with molten steel from a transport ladle (not illustrated herein). The tundish is used to position the casting stream very precisely and, during sequential casting operations, as a buffer when the ladles are being changed. The molten steel passes through a nozzle into a recess 4 in a casting wheel 5. This recess runs in the direction of the periphery of the casting wheel 5 and forms a closed groove. This is of trapezoidal shape, which is to say that--in the radial direction--its inner surface is somewhat narrower than the outer surface. As an example, the inner surface is approximately 130 mm long in the axial direction of the casting wheel, whereas the depth of the recess 4 is 128 mm, for example. The recess 4 is open to the outside in the radial direction. It is preferred that the casting wheel consist of a steel frame and a water-cooled copper ring that embodies the recess 4.
At least in the area of the still molten steel filling the open side fo the recess 4 is closed off by a steel band 6 that rotates with it. This steel band moves over a length of approximately one-quarter of the circumference of the casting wheel 5 with the casting wheel, and consists of an endless steel strip that passes over three guide rollers 7, 8, and 9 in such a manner that the steel b
REFERENCES:
patent: 2206930 (1940-07-01), Webster
patent: 2246907 (1941-06-01), Webster
patent: 4030537 (1977-06-01), Ward
patent: 4117880 (1978-10-01), Cimetiere et al.
Batten, Jr. J. Reed
Korf Engineering GmbH
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