| 摘要 |
PROBLEM TO BE SOLVED: To provide the drain hole of a heat insulating foamed container. SOLUTION: A core is arranged in a cavity formed by all of molds so as to be capable of molding a vertically piercing drain hole and a communication hole, which communicates with the vertical drain hole from the bottom part of a container main body, in the wall of a foaming container molded by charging a raw material in the cavity and the core molding the communication hole is made movable and revolvable by a spring and drawn in after the molding of the container or made revolvable in connection with the taking-out movement of a molded article.
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