Molding apparatus of glass mass, method of manufacturing a glass gob, a method for producing glass moldings, and a method of manufacturing an optical element

摘要

Molding apparatus of glass mass (1), the supply flow channel is more than one mold which is connected to the gas supply unit (102A, 102B) is branched towards the each, each branch flow path after the branch (106aA, 106aB) but the corresponding glass mold (102A, 102B) through hole group by being connected to the (102H) and communicates the respective branch paths (106aA, 106aB) during the squeeze branch channel (106aA, 106aB) throttle portion (118A, 118B) are provided. Throttle portion (118A, 118B) cross-sectional area of ​​the branch flow path throttled by (S1) is manifested through hole group and (102H) on the cut surface when cut in a direction perpendicular to the axial direction, a plurality of through-holes Each is smaller than the sum W of the cross-sectional areas. By a molding apparatus of the glass gob (1), it is possible to stably levitate the molten glass in each of the glass mold.