MXPA98010306A - Fl plate plant - Google Patents

Abstract

The present invention relates to a strip casting unit with a feeder mechanism of molten metal, a support belt for molten and solidified metal and side limiters in close contact with the support belt, in which the feeder mechanism and the side limiters are manufactured to be able to oscillate in the plane of the support tape and are articulated to a device for the production of oscillations perpendicular to the direction of movement of the tape, characterized in that the lateral limiters can be fixed at an angle between

Description

PULLOVER OF STRIP PACKING The invention relates to a strapping plant, in particular for the casting of steel strip. By melting steel strip, the thickness of the strand casting can be selected to an excellent extent, depending on the thickness required of the finished hot strip (1 to 3 mm), as well as on the conformation in hot necessary to obtain adequate properties of the material. German patent document DE 31 42 099 discloses a device for continuous casting of metal comprising a feeding device for liquid metal, a support belt for liquid and solidified metal and lateral constraints that closely adjoin the belt of metal. support. The lateral restrictions are fixed to the support belt in the manner of a chain of links. Such a form of construction is technically very expensive. It is also only suitable for relatively small strip widths. In the case of larger bandwidths, the tension applied to the support by the thermal load is substantially greater than in the case of narrow strapping, so that in the case of large bandwidths the construction of the restriction can not be used. lateral that circulates like a chain, which acts as a reinforcement. In the case of an immobile lateral restriction in relation to the transport direction of the strapping or support, during the casting process, an adhesion of the solidified steel occasionally occurs. This leads to massive defects of the strapping and operation delays that reach the interruption of the casting. Similar problems arise in the feeding device. Steel is also occasionally adhered to it, which causes the same difficulties. Accordingly, there was the task of providing a strip casting plant in which the adhesion of solidified steel to the feeding device and to lateral restrictions is reliably prevented. This task is solved by proceeding in such a way that the feeding device and / or the lateral restrictions in the plane of the support belt are designed so that they can vibrate and, they are connected to a vibration generating device. By these measures the adhesion of solidified material can be avoided. According to a preferred embodiment, the vibrations of the feeding devices and / or the lateral restrictions develop substantially perpendicular to the direction of conveyance of the strip. Either the vibration is carried out in the plane of the support belt, or the strand of cast steel, but transversely with respect to the direction of transportation. This has the advantage that the cost of construction is less than in the case of a vibration in the direction of transportation, with which it would be necessary to accurately drive the lateral restriction along the entire length. Furthermore, in the case of this design, it is possible to optimally adjust the vibration in the area of the metallurgical length (from the area of the casting to the total solidification of the strip), proceeding, for example, so that the lateral restrictions are subdivide in this zone into individual sections with respectively optimum frequency and amplitude. According to another preferred embodiment, the side restriction walls can be adjusted so that they form an angle with respect to one another. This applies both to the opposite side restriction walls, as well as to the sections that eventually exist on each of the sides. By this it is possible to improve the uniformity of the thickness of the strip across the entire width of the strapping. In particular, the lateral restraints are also inclined relative to the perpendicular with respect to the surface of the support tape. In accordance with a preferred embodiment, the lateral restriction walls are constituted by hollow profiles cooled by water. The devices for the generation of vibrations are preferably eccentric drives, but nevertheless it is also possible to use electromagnets or hydraulic cylinders. The shape of the vibration can have, among others, sinusoidal shape, sawtooth shape or trapezoidal shape. The stroke frequency is, for example, 50 Hz in the case of a stroke of, for example, 0.5 mm. The cooling water is fed through flexible hoses. In the case of a cover that preferably exists on the cast strip, for the waterproofing between the lateral restrictions and the covers a layer of temperature-resistant waterproofing material, in particular of ceramic fiber felt, is provided. A corresponding waterproofing is provided between the feeding device and the support tape, with an aluminum foil being preferably sandwiched between the support tape and the waterproofing, so that in the case of a vibration only the foil is carried out. a relative movement between the felt layer and the aluminum foil. The feeding device and the lateral constraints are preferably supported by coil springs. According to another preferred embodiment, the constraints can vibrate simultaneously both perpendicularly as well as parallel to the movement of the strip (direction of the casting), so that overall a thrust force acting in the direction of casting on the edge also results. of the strap. In particular the vibration has components in all three spatial directions. Otherwise, the vibration can be perpendicular with respect to the surface of the strip. In a special embodiment, the excitation of the vibrations is carried out by beating in the longitudinal and transverse direction of the lateral restriction. By means of this it is possible to apply longitudinal waves at once with which adhesion is effectively prevented.

Claims (1)

1. CLAIMS Strip casting plant with a feeding device for liquid metal, a support belt for liquid metal and solidified, and lateral restrictions that adjoin closely with the support tape, characterized by the fact that the feeding device and / or The lateral restraints, in particular in the plane of the support tape, are designed so that they can vibrate and are connected with a vibration generating device. Strip casting plant according to claim 1, characterized in that the vibration of the feeding device and / or the lateral restrictions is carried out substantially perpendicular to the conveyance direction of the strip. Strip casting plant according to claim 2, characterized in that lateral restraints are arranged which can be adjusted so that they form an angle with respect to each other. Strip casting plant according to one of claims 1 to 3, characterized in that the lateral restrictions are constituted by one or several sections of hollow profiles cooled by water. Strip casting plant according to claim 1, characterized in that the vibration of the lateral restriction is carried out simultaneously both perpendicularly and also parallel to the direction of the casting.