Method of extracting spin cast fused silica

Details Method of extracting spin cast fused silica Method of extracting spin cast fused silica

1989-02-10

1990-10-23

Lacey, David L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65266, 65302, C03B 1900

Patent

active

049649027

ABSTRACT:
This invention relates to a method of making an object of silica glass, such as a crucible, according to which a pot capable of rotating about its axis is filled with a refractory pulverulent material. The pot is rotated and a cylindrical cavity is formed in the material, the axis of which coincides with that of the pot. The bottom and the wall of the cavity are then formed to a certain thickness with a silica-rich material. This silica-rich material is melted, the object thus produced is cooled and then extracted vertically by an extraction mechanism comprising a gripping member which is rotating, at least initially, at the same speed as the pot.

REFERENCES:
patent: 2198750 (1940-04-01), Winder
patent: 3150951 (1964-09-01), Mayhew
patent: 3205057 (1965-09-01), Benard
patent: 3419375 (1968-12-01), Meiresonne
patent: 4416680 (1983-11-01), Bruning
patent: 4528163 (1985-07-01), Albrecht
patent: 4632686 (1986-12-01), Brown

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