Metal founding – Means to shape metallic material – Continuous or semicontinuous casting
Patent
1989-04-20
1990-02-20
Rowan, Kurt
Metal founding
Means to shape metallic material
Continuous or semicontinuous casting
B22D 1104
Patent
active
049017837
ABSTRACT:
A continuous casting apparatus wherein molten metal flows through a die progressively and is solidified in the die and withdrawn from the die comprising a die and cooling assembly including a tubular die having an external tapered surface which is uniformly tapered radially inwardly in the direction of movement of metal to the die, a cooling sleeve having an internal surface complementary to the external surface of the die and in substantial intimate surface contact with the external surface of the die, an annular cooling shell surrounding the cooling sleeve and having portions thereof spaced from the sleeve to define a cooling chamber, and at least one inlet to the chamber, at least one outlet from the chamber. The tubular die has an internal surface which is uniformly tapered radially inward in the direction of movement of metal to the die such that as the molten metal flows progressively through the die and is solidified and contracts, substantially intimate contact is maintained between the internal surface of the tubular die and the solidified metal so that improved heat transfer is achieved. The tubular die has a greater external diameter before assembly than the internal diameter of the cooling sleeve before assembly and the cooling sleeve is shrunk fit on the tubular die such that the tubular die is in compression at ambient temperature and the strength of the die is increased and such that as the cooling sleeve temperature increases in usage, intimate contact is maintained between the cooling sleeve and the die.
REFERENCES:
Perry, Robt. H. et al., Eds., Chemical Engineers' Handbook, 5th Ed. (McGraw-Hill, 1973), pp. 3-99 and 3-100.
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