| 摘要 |
A thermal jacket (30) for use in the production of a semi-solid slurry bille t. The thermal jacket (30) includes symmetrical halves (30a, 30b), each having a heat transfer surface (50) extending between a pair of longitudinal edges (54a, 54b). An actuator mechanism (32) engages the heat transfer surfaces (5 0) into intimate contact with a vessel (20) containing metallic melt to effectuate conductive heat transfer, with the longitudinal edges (54a, 54b) being disposed in a generally opposite, spaced relationship. The thermal jacket (30) includes a plurality of cooling air passageways (120, 122) for extracting heat from the metallic melt, and a plurality of electric heating elements (132) for adding heat to the metallic melt. The cooling rate of the metallic melt is controlled within a range of about 0.1 to 10 degrees Celsius/second by regulating the flow of cooling air and the activation of t he heating elements (132). Fluid manifolds (104, 106) are disposed at opposite ends of the thermal jacket (30) to distribute and direct the flow of cooling air.
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