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公开(公告)号：US3825058A
公开(公告)日：1974-07-23
申请号：US34947173
申请日：1973-04-09
Applicant: SINTOKOGIO LTD
CPC classification number: B22C9/03
Abstract: A mold prepared by a vacuum sealed molding process in which, in order to prevent breakdown of the mold during pouring of a molten metal, a tubular member forming a passage serving as a communication means between the mold cavity and the atmosphere is connected to the uppermost portion of a shield member defining the cavity so that the atmospheric pressure can be imparted to the cavity even when the molten metal is being poured into the cavity.
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