Glass manufacturing – Processes – With shaping of particulate material and subsequent fusing...
Patent
1992-01-02
1992-08-25
Lindsay, Robert L.
Glass manufacturing
Processes
With shaping of particulate material and subsequent fusing...
65 181, 65901, 249117, 501 12, 425808, B28B 720, B29C 3300, C03C 400
Patent
active
051415461
ABSTRACT:
In a method of manufacturing a glass article by means of a sol-gel process, a metal alkoxide is hydrolyzed, dehydrated and condensed to obtain a wet gel. A molding container is used for drying and shrinking the wet gel to obtain a dry gel. A bottom wall of the molding container has an inner surface formed with a recess or recesses. The wet gel is dried and shrunk to form a gap or gaps between the inner surface of the bottom wall and the gel on the way of drying and shrinking. The gap or gaps communicate with a space which occurs between an inner surface of a peripheral wall of the molding container and the gel on the way of drying and shrinking. A liquid layer, which is generated by the drying and shrinking of the wet gel, between the inner surface of the bottom wall and the gel on the way of drying and shrinking, accompanied with the drying and shrinking of the wet gel, is vaporized and removed to the ambient atmosphere through the gap or gaps and the space, according to which the gel on the way of drying and shrinking is dried.
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Hoya Corporation
Lindsay Robert L.
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