Gas-blow casting nozzle

Details Gas-blow casting nozzle Gas-blow casting nozzle

1986-07-07

1988-05-24

Rolla, Joseph J.

Dispensing

Molten metal dispensing

Gaseous fluid engages molten metal

164337, 164437, 266220, B22D 1110

Patent

active

047460385

ABSTRACT:
A gas-blow casting nozzle has an annular gas-blowing hollow chamber with a gas-permeable part which is provided between the hollow chamber and the pouring hole of the nozzle body, and a number of joint parts for integrally joining the inner wall and the outer wall of the hollow chamber, which are provided in the radial direction of the annular hollow chamber. The total of the vertical section of the cylindrical area of the joint parts is about 30% to 70% of the cylindrical area of the hollow chamber. The gas-blowing hollow chamber which has the function of a heat-insulating layer is so constructed that the inner wall and the outer wall of the hollow chamber are partially and uniformly joined with the joint parts, and the joint parts are made to have the function of a heat-transfering layer, whereby the temperature difference in the radial direction of the nozzle body may be made small and the occurrence of thermal stress in the casting nozzle may be prevented. Because of the reduction of the temperature difference between the inner part and the outer part of the hollow chamber in the gas-blow casting nozzle, the breakdown damage of the nozzle body may be prevented.

REFERENCES:
patent: 3253307 (1966-05-01), Griffiths et al.
patent: 4531567 (1985-07-01), Gruner et al.

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