Patent ID: 8002155

Claim:
A slide valve device for automatic surface pressure application, comprising: a fixed plate ( 3 ) fixed within a base frame ( 2 ) firmly adhering to a bottom lower surface ( 1 a ) of a molten metal vessel ( 1 ); a slide case ( 4 ) having a slide plate ( 5 ) slidably provided by means of an actuator ( 7 ) below the fixed plate ( 3 ); a seal case ( 21 ) provided below the slide case ( 4 ) and having a seal plate ( 21 a ) and/or a shooting nozzle ( 6 ); a movable body ( 14 ) provided to each side portion of the seal case ( 21 ) so as to be movable on a support surface ( 13 ); and a coupling means ( 23 ) for coupling a guide piece ( 4 b ) coupled with the slide case ( 4 ) with the seal case ( 21 ), wherein the guide piece ( 4 b ) and the seal case ( 21 ) are slid by means of the actuator ( 7 ) in a state of being coupled with each other through an intermediation of the coupling means ( 23 ) so that the surface pressure can be applied and released.