Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1977-07-05
1979-03-27
Spicer, Jr., Robert L.
Metal founding
Process
Shaping liquid metal against a forming surface
164421, B22D 1100
Patent
active
041460790
ABSTRACT:
A process for continuous casting of hollow ingots wherein the rate of heat removal from the surface of an ingot within a mold is changed gradually over the mold height from a given maximum value in the ingot skin formation zone to a given minimum value as the ingot emerges from the mold. The speed of the continuous ingot withdrawal from the mold is increased gradually during each withdrawing cycle from zero to the maximum value for apredetermined length of time. An apparatus in accordance which comprises a water-cooled mold which is made in the form of an inverted truncated cone with the diameter of any of its bases being substantially less than its height. A part of the upper portion of the mold being cylinder-shaped and formed with a plurality of slots. The diameter of projections formed by the slots is slightly less than that of the top base of the frustoconical section, with the walls of the slots passing smoothly into projections. Mounted above the mold is a detachable screen adapted to control the rate of heat removal from the ingot outside the mold.
REFERENCES:
patent: 3075264 (1963-01-01), Wognum
patent: 3410333 (1968-11-01), Woodburn, Jr.
Anisovich Gennady A.
Bevza Vladimir F.
Ivanov Gennady E.
Marukovich Evgeny I.
Mazko Vasily S.
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