Method and device for sealing a gap between a roller front face and side seal on a roller-strip-casting machine
AssigneesSMS Demag AG, Main Management Inspiration AG
InventorsHeinrich Marti, Jacques Barbé, Dominique Salathè, Alfred Koch
Life of this patent
Estimating the term…
Abstract
The reliable sealing of a gap (10), between a roller front face (7) and a side seal (3) on a roller-strip-casting machine is achieved by the generation of an electrical eddy field in the region of the gap (10), such as to produce a local gradient field (13). The eddy currents generated in the metal melt for casting prevent the ingress of the metal into the gap (10) or eject the metal from the gap (10). The risk of escape of liquid metal is essentially eliminated and the formation of ridges on the narrow edge of the metal strip avoided.
Claims12
Method of sealing a gap between the end face of a casting roll (1, 2) and a side seal (3) of a roll strip-casting machine, comprising the steps of:
- inducing a rotational electric field in a region of the gap (10) in such a way that a local gradient field (13) is produced, whereby eddy currents generated in the molten metal to be cast prevent the molten metal from penetrating the gap (10) or force the molten metal out of the gap (10), such that a “field guide” (20) is built into an end face (7) of the roll, wherein the roll (1, 2) has a basis material (5), and a wear-resistant surface layer (6);
- positioning the “field guide” (20) relative to the surface of the roll in such a way that the basis material (5) and the wear-resistant layer (6) extend to the end face (7) of the roll;
- installing copper plates (22, 23) inside the iron body (16) of a magnetic element for influencing the gradient formation of the rotational electric field, the copper plates (22, 23) simultaneously serving as cooling elements.
Device for sealing an air gap between the end face of a casting roll (1, 2) and a side seal (3) of a roll strip-casting machine, comprising:
- at least one magnetic element (15), which comprises a coil (17) and an iron body (16) that forms the air gap, wherein the iron body (16) is installed in such a way that a gradient field is generated in the air gap in the region of the gap (10) between the end face (7) of the roll and the side seal (3);
- and copper plates (22, 23) are installed inside the iron body (16) for optimizing the gradient field to be generated and for cooling.
Dependencies are inferred from the claim text.