Fuji Hollow Valve Inc.

Takahiro Karita

Yasushi Maeda

An umbrella part metallic sodium insertion device for inserting rod-shaped metallic sodium into a hollow part of a hollow valve; a melting device for melting the metallic sodium in the hollow part by inserting a push rod from an opening into the hollow part of the hollow valve, in which the metallic sodium has been inserted by the device, and, while pushing the rod-shaped metallic sodium in the hollow part, heating the umbrella part to a temperature at which the metallic sodium is melted; a stem part cooling device for cooling a stem part of the hollow valve, in which the metallic sodium has been melted by the melting device, to a temperature lower than the temperature at which the metallic sodium is melted; and a stem part metallic sodium insertion device for inserting rod-shaped metallic sodium into the hollow part which has been cooled by the device.

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Tokyo, Japan

Takahiro Karita