Direct cooled metal casting process and apparatus

Details Direct cooled metal casting process and apparatus Direct cooled metal casting process and apparatus

1994-02-25

1996-12-10

Batten, Jr., J. Reed

Metal founding

Process

Shaping liquid metal against a forming surface

164444, 164487, B22D 1104, B22D 1124

Patent

active

055822304

ABSTRACT:
In direct cooling an ingot emerging from a mold, two sets 136 and 142 of liquid coolant streams are discharged onto the ingot from an annulus 62 circumposed about the lower end opening 72 of the mold. One set of streams, 136, is discharged downwardly at 22.5 degrees to the axis 12 of the mold, and the other, 142, is discharged downwardly at 45 degrees to the axis of the mold. The two sets are staggered to one another circumferentially of the mold, and because of the high angle of incidence of the 45 degree set to the axis of the mold, substantial portions of the 45 degree streams rebound from the surface of the ingot at their points 144 of impact with the ingot, and mushroom into corolla-like masses of air borne liquid coolant spray 146 lying crosswise the paths of the 22.5 degree streams, which in turn entrain the spray and impact the successive layers 138 of coolant therebelow with the spray. To aid in the entrainment, the respective streams are spaced apart from one another so closely that the respective pairs of adjacent corolla-like masses of spray actually shoot up "interaction fountains" 148 of spray directly in the paths of the 22.5 degree streams of coolant. The effect is to widen the bands 135 of turbulence in the layers 138 of coolant; and the bands may even be widened to the extent of eliminating the laminar flow regime 137 in each layer. The height 133 of the bands is also commonly raised.

REFERENCES:
patent: 3713479 (1973-01-01), Bryson
patent: 4166495 (1979-09-01), Yu
patent: 4693298 (1987-09-01), Wagstaff
patent: 5040595 (1991-08-01), Wagstaff
patent: 5119883 (1992-06-01), Wagstaff et al.
S. J. Salyzak et al "Effects of Interactions Between Adjoining Rows of Circular, Free Surface Jets on Local Heat Transfer from the Impingement Surface", Journal of Heat Transfer, American Society of Mechanical Engineers, vol. 16, Feb. 1994, pp. 88-95.

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