Metal founding – Means to directly apply electrical or wave energy to work
Patent
1975-08-07
1977-01-11
Lazarus, Richard B.
Metal founding
Means to directly apply electrical or wave energy to work
164278, 164338M, B22D 2702
Patent
active
040021971
ABSTRACT:
Continuous casting apparatus is described 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 travelling belts are 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. Intensive infra-red heaters are shown directed at close range toward the casting surfaces of the belts, these heaters serving also to cure and dry any coating material on the belts. Heating 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 temperatures, these sensors being shown with automatic control of the belt pre-heating action. The apparatus of the invention can be applied to twin-belt casting machines regardless of whether the molten metal is supplied by open pool, closed pool or injection feeding.
REFERENCES:
patent: 1651678 (1927-12-01), Davis
patent: 1671360 (1928-05-01), Fletcher
patent: 2904860 (1959-09-01), Hazelett
patent: 3426836 (1969-02-01), Altenpohl et al.
patent: 3689346 (1972-09-01), Rowland
Hazelett Robert William
Wood John Frederick Barry
Hazelett Strip-Casting Corporation
Lazarus Richard B.
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