Method of extracting spin cast fused silica
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United States of America Patent
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Oct 23, 1990
Grant Date -
N/A
app pub date -
Feb 10, 1989
filing date -
Feb 10, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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