Glass manufacturing – Processes – Sequentially forming – reheating – and working
Patent
1993-07-02
1994-09-13
Lindsay, Robert L.
Glass manufacturing
Processes
Sequentially forming, reheating, and working
65102, 65157, 65162, 65 2919, C03B 2300
Patent
active
053465229
ABSTRACT:
A method and apparatus are disclosed which place a glass blank on a lower mold arranged in an opposed relation to an upper mold, heat these molds and glass blank by an infrared lamp unit or high-frequency coil arranged around the molds and press-mold an optical glass element. In the method and apparatus, the infrared lamp unit or high-frequency coil is supported by a supporting mechanism such that it is movable along a direction in which the mold is moved. In cases where a relative position of the infrared lamp unit or high-frequency coil to the mold varies depending upon the shape and size of such molds or the shape and size of optical glass elements obtained, the infrared lamp or high-frequency coil is adjustably moved relative to the mold by a movable mechanism using a motor or air cylinder as an operation source. By using temperature sensors attached to both the molds, the temperatures of the upper and lower molds are controlled to a corresponding desired level.
REFERENCES:
patent: 4591373 (1986-05-01), Sato
patent: 5264016 (1993-11-01), Komiyama
patent: 5282878 (1994-02-01), Komiyama et al.
Arai Fumio
Hasegawa Yutaka
Komiyama Yoshizo
Nakanishi Fusao
Sugiyama Hisataka
Lindsay Robert L.
Toshiba Machine Co. Ltd.
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