METHOD FOR MANUFACTURING GLASS MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a glass molding such as a lens by which the release from a molding die is easily carried out to obtain a product having a high precision surface shape even in the case of a temperature condition or a molding shape which cause the strong sticking on the upper side.

SOLUTION: This method for manufacturing the glass molding is performed by press-molding a heated and softened glass base material using a manufacturing apparatus having an upper die and a lower die opposed to each other and containing a cylindrical member surrounding directly or indirectly the upper die and the lower die or a manufacturing apparatus containing an upper die and a lower die opposed to each other and having forcibly releasing means around the upper die and the lower die. After the press-molding and before the molded glass molding is taken out from the manufacturing apparatus, at least one of the upper die and the lower die is vertically reciprocated one or more times.

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