Slide valve apparatus for automatic application of surface pressure and surface pressure application method thereof

A surface pressure application method for a slide valve device for automatic surface pressure device,

• the slide valve device for automatic surface pressure application including:
• a fixed plate (3) fixed inside a base frame (2) that is mounted onto a bottom lower surface (la) of a molten metal vessel (1);
• a slide case (4) including a slide plate (5), the slide case (4) being provided below the fixed plate (3) so as to be slidable by an actuator (7);
• a seal case (21) provided below the slide case (4), the seal case (21) including a seal plate (6) or including a seal plate (6) and a shooting nozzle (21a);
• and
• a movable member (14) provided to each side portion of the seal case (21) so as to be movable on a support surface (13) situated at each side portion of the base frame (2),
• the slide case (4) and the seal case (21) being slidable by the actuator (7) so that a surface pressure is appliable and releasable,
• the base frame (2) of the slide valve device for automatic surface pressure application including:
• a positioning member (51) for determining an arrangement location (X) of the seal case (21);
• and
• a stopper (52) for fixing the seal case (21) at the arrangement location (X),
• the slide case (4) or a guide piece of the slide valve device for automatic surface pressure application including a pusher (53) for pushing the seal case (21),
• the surface pressure application method comprising:
• sliding the slide case (4) in a surface pressure application direction to move the seal case (21) to the arrangement location (X) together with the slide case (4) through the intermediation of the pusher (53);
• and
• fitting the stopper (52) to the seal case (21) that has been moved to the arrangement location (X) to fix the seal case (21) at the arrangement location (X).