Metal founding – Means to shape metallic material – Continuous or semicontinuous casting
Reexamination Certificate
2006-09-19
2006-09-19
Kerns, Kevin (Department: 1725)
Metal founding
Means to shape metallic material
Continuous or semicontinuous casting
C164S488000, C222S606000, C222S591000
Reexamination Certificate
active
07108046
ABSTRACT:
In an immersion nozzle exchanging apparatus for supporting an immersion nozzle at a flange underside thereof by a plurality of key plates parallel provided on both sides to horizontally pushing out and exchange an immersion nozzle much used with a new immersion nozzle, in order to secure high realability in the joint surface at between the immersion nozzle and the refractory positioned above thereof, the immersion nozzle exchanging apparatus comprises urge pressure providing mechanisms independent of each key plate for continuously changing a deflection amount of a spring body thereof depending on a moving position of the immersion nozzle upon exchanging the immersion nozzle and at the same time changing an immersion nozzle urging force caused on the respective key plates, and a slide frame having a spring body supporting seat surface formed with a taper surface in part thereof. The immersion nozzle to be used therein has a concave surface for holding a seal member having a depth of 1.0–10 mm in a joint surface central region. A closing fire plate has a thickness greater than a flange thickness of the immersion nozzle and a difference in thickness of at least 12 mm. Also, a closing fire plate upper surface has both ends perpendicular to a push-out direction recessed over at least a width of 10 mm and a depth of 12 mm.
REFERENCES:
patent: 4995535 (1991-02-01), Ooya et al.
patent: 5688425 (1997-11-01), Yamamoto et al.
Funato Junichi
Inoue Yukio
Kawano Yasuo
Toyota Motoki
Yokoi Nobuyuki
Jordan and Hamburg LLP
Kerns Kevin
Krosaki Harima Corporation
Lin I.-H.
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