PURPOSE: To obtain a constructing method to be easily performed and having excellent amorphous charging density by blowing gas through a gas blowing tube, and vibration-charging an amorphous refractory material on the outer surface of a core by regulating buoyancy at the time of charging the material on the outer surface of the core and blowing the air.
CONSTITUTION: An internal pressure of a core 4 is held by feeding compressed air 7 through a manual valve 7-1 and a motor-driven valve 7-2, and so automatically operating the valve 7-2 by the cooperation of a voltage controller 7-3 and a pressure gauge 8 as to become a set pressure. When the pressure excessively rises, a safety valve 9 is operated to hold at a predetermined pressure. The internal pressure of a flexible core is varied by the combination cooperation of the valve 9, the valve 7-2 and the controller 7-3, a timer and a pressure setter held in the controller 7-3 when the flowing refractory material is still in a fluidized state to improve charging properties of the material. 7-4 opens the connected valve 7-1 to apply vibration to a core sheath when air bubbles are passed through storage water to improve charging properties of the material.
ISOMURA SACHIYOSHI
MATSUI TAIJIRO
NAKAMURA HITOSHI
