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METHOD FOR PRODUCING GLASS GOB, METHOD FOR PRODUCING GLASS MOLDED BODY, GLASS GOB PRODUCTION DEVICE, AND GLASS MOLDED BODY PRODUCTION DEVICE
METHOD FOR PRODUCING GLASS GOB, METHOD FOR PRODUCING GLASS MOLDED BODY, GLASS GOB PRODUCTION DEVICE, AND GLASS MOLDED BODY PRODUCTION DEVICE
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机译:玻璃坯料的制造方法,玻璃坯料的制造方法,玻璃坯料的制造装置以及玻璃坯料的制造装置
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摘要
PROBLEM TO BE SOLVED: To provide production methods where the generation of air pockets can be securely prevented without using a lower die having large ruggedness at the surface, and a glass gob and a glass molded body having reduced surface roughness can be efficiently produced.;SOLUTION: When molten glass drops are dropped to a lower die, in such a manner that the collision between the lower die and the molten glass drops is performed in a reduced pressure atmosphere where pressure is made lower than the atmospheric pressure, the region of the circumference of the lower die is depressurized.;COPYRIGHT: (C)2009,JPO&INPIT
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