Molds used for blowing glass articles.

摘要

In order to form a steam cushion between a glass and a metal mold during operation blowing the glass in the mold, the mold is provided with a large number of small holes mechanically-formed in and distributed overthe innersurface of the mold for retaining water therein. Since the metallic inner surface of the mold is directly exposed to the molding cavity of the mold, the mold is not substantially subjected to abrasion and burning during the blowing operation so that the working life of the mold is extended.