| 简介 |
PROBLEM TO BE SOLVED : To provide a cooling device variable of a cooling power and capable of decreasing the cooling power in a high temperature zone particularly without decreasing the cooling power in the low temperature zone affecting a cooling time, and to provide an apparatus for strip-casting a rare earth metal magnet alloy, which is provided with the cooling device and a method therefor.
SOLUTION : In this cooling device, the cooling power is changed and controlled by using a triple-tube system cooling tube unit constituted of an outer tube, a middle tube and an inner tube, and allowing a cooling medium to flow through a passage constituted of the inner tube and the middle tube and exhausting gas under vacuum or introducing helium for promoting the cooling through the annular gap part between the outer tube and the middle tube. |
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