Roll for a device for the direct continuous casting of thin strips of molten metal
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United States of America Patent
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Mar 9, 1993
Issued Date -
N/A
app pub date -
Jan 9, 1992
filing date -
Oct 2, 1989
priority date (Note) -
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Abstract
An apparatus for the direct continuous casting of thin strips of molten metal comprises a source of molten metal and at least one cooled roll which receives the molten metal, wherein the at least one cooled roll includes a cylindrical inner core, a first sleeve enclosing the inner core, cooling channels provided between the first sleeve and the core and a second sleeve enclosing the first sleeve and being in contact with the molten metal. The second sleeve forms with the first sleeve two superposed cylindrical layers which are chosen of materials such that the first sleeve has a coefficient of thermal expansion higher than that of the second sleeve. The thicknesses of the first and second sleeves are chosen in relation to the thermal conductivity and coefficient of thermal expansion of the materials from which the sleeves are formed, so as to reduce when the apparatus is in use, the difference between an axial expansion of the first sleeve, which is maintained at a low temperature by a circulating cooling fluid in the cooling channels, and an axial expansion of the second sleeve which is maintained at a high temperature due to its contact with the molten metal.
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