B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/168, 22/53
B22D 11/06 (2006.01)
Patent
CA 1070925
ABSTRACT OF THE DISCLOSURE Continuous casting methods and apparatus are des- cribed wherein the temperature of the flexible casting belts in twin-belt machines having two or more main rolls in each belt carriage is controllably elevated prior to contact with the molten metal to improve the casting conditions and the operation of the thin flexible casting belts; the temperature elevation preferably being relatively gradual may be carried out while the traveling belts axe approaching the nip rolls or while the belts are in contact with the nip rolls, or both. Zone control of belt pre-heating is disclosed, and control of the coolant streams issuing from the curved nip roll tubes by use of fingernail-like extenders may be provided to aid in pre- heating the belts and in controlling their operation. In- tensive infra-red heaters are shown directed at close range toward the casting surfaces of the belts, these heaters erving also to cure and dry any coating material on the belts. Heat- ing of the nip rolls by means of hot fluid, such as steam, is described, with the hot fluid being directed into the interior of the nip roll or being directed into the deep grooves in the nip roll beneath the rear surfaces of the casting belts. Mechanical and thermal sensors may be employed to sense the distortion of the belts and to measure their operating tempera- tures, these sensors being shown with automatic control of the belt pre-heating action. The methods and apparatus of the invention can be applied to twin-belt casting machines regard- less of whether the molten metal is supplied by open pool, closed pool or injection feeding. -1-
212480
Hazelett Robert W.
Wood John F.b.
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