Sliding Nozzle Device and Pouring Device

Abstract

A fixed plate ( 15 ) is provided in a fixed metal frame ( 14 ). An opening and closing metal frame ( 17 ) having a movable plate ( 21 ) is attached to the fixed metal frame ( 14 ) so as to be openable and closable. The fixed metal frame ( 14 ) is provided with a pressurizing mechanism ( 23 ) applying a pressure in a closing direction generated by a spring ( 25 ) to the opening and closing metal frame ( 17 ) in a closed state. An actuating member ( 29 ) is movably provided at a position facing the pressurizing mechanism ( 23 ). Cam surfaces ( 30 d, 32 a ) are provided between the actuating member ( 29 ) and the pressurizing mechanism ( 23 ). The spring ( 25 ) is deformed against an urging force thereof on the basis of operations of the cam surfaces ( 30 d, 32 a ) in accordance with a movement of the actuating member ( 29 ), and the pressure applied to the opening and closing metal frame ( 17 ) is strengthened.

1 . A sliding nozzle apparatus comprising:
 a fixed metal frame having a fixed plate in which a fixed nozzle hole is formed, and structured such as to be attached to a molten metal container;   an opening and closing metal frame having a movable plate in which a movable nozzle hole is formed so as to be slidable in a state of being lapped over said fixed plate and correspond to said fixed nozzle hole, and being openable and closable with respect to the fixed metal frame; and   a pressurizing means provided in said fixed metal frame and applying a pressure in a closing direction by a spring to the opening and closing metal frame in a closed state,   wherein a passage between both nozzles is opened and closed by the movable plate being slid in the closed state of the opening and closing metal frame, the sliding nozzle apparatus further comprising:   an actuating member having a cam surface is provided between the pressurizing means and the opening and closing metal frame, the spring is deformed against an urging force thereof on the basis of an operation of the cam surface in accordance with the actuation of the actuating member in the closed state of the opening and closing metal frame, whereby the pressurizing force is strengthened.   
   
   
       2 . A sliding nozzle apparatus according to  claim 1 , wherein the pressurizing means is provided with a rotating member rotatably supported by the fixed metal frame, and a holding member supported by the rotating member so as to move forward and backward and capable of moving between a position holding the opening and closing metal frame in accordance with the rotation of the rotating member and a position separated from the held position, and said spring is provided between the rotating member and the holding member. 
   
   
       3 . A sliding nozzle apparatus according to  claim 2 , wherein said actuating member is arranged between said opening and closing metal frame and the holding member, the actuating member is exposed to the reaction force of the spring by deforming said spring against its elasticity on the basis of an operation of the cam, and the reaction force is applied as a force in a direction of closing the opening and closing metal frame. 
   
   
       4 . A sliding nozzle apparatus according to  claim 3 , wherein said actuating member is constituted by a moving member arranged so as to be movable in the same direction as the forward and backward moving direction of the holding member between said opening and closing metal frame and the holding member, and a cam member arranged between the moving member and the opening and closing metal frame and pressing the opening and closing metal frame in the closing direction on the basis of the reaction force of the spring generated by moving the moving member in the direction against the elasticity of the spring due to the operation of the cam surface. 
   
   
       5 . A sliding nozzle apparatus according to  claim 4 , wherein the apparatus is provided with a switching means for switching the cam member to a state in which said cam member is arranged at a position pressurizing the opening and closing metal frame on the basis of the cam operation and a position canceling the pressurization, by being integrally moved with said movable plate, and a state in which the cam member is fixed to the opening and closing metal frame in said pressurized position. 
   
   
       6 . (canceled) 
   
   
       7 . A pouring apparatus comprising:
 a fixed metal frame having a fixed plate in which a fixed nozzle hole is formed, and structured such as to be attached to a molten metal container;   an opening and closing metal frame having a movable plate in which a movable nozzle hole is formed so as to be slidable in a state of being lapped over said fixed plate and correspond to said fixed nozzle hole, and being openable and closable with respect to the fixed metal frame;   a pressurizing means provided in said fixed metal frame and applying a pressure in a closing direction by a spring to the opening and closing metal frame in a closed state,   wherein a passage between both nozzles is opened and closed by the movable plate being slid in the closed state of the opening and closing metal frame, the sliding nozzle apparatus;   an actuating member having a cam surface is provided between the pressurizing means and the opening and closing metal frame, the spring is deformed against an urging force thereof on the basis of an operation of the cam surface in accordance with the actuation of the actuating member in the closed state of the opening and closing metal frame, whereby the pressurizing force is strengthened; and   a drive apparatus for sliding said movable plate.