Apparatus for cutting vitreous silica crucible
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United States of America Patent
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Jan 31, 2017
Grant Date -
Jan 20, 2011
app pub date -
Mar 16, 2009
filing date -
Mar 19, 2008
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A cutting method and an apparatus are provided which enable a rim area or other part of a vitreous silica crucible to be cut off so as to leave a smooth cut surface without damaging the cut edge, etc. The apparatus for cutting the crucible comprises a disk-shaped cutting blade (10) disposed to be movable with respect to the crucible. Without rotating the crucible (20), the rotating cutting blade (10) is brought into contact with a surface of the crucible wall and pushed forward in the wall thickness direction to make a cut piercing the crucible wall. The cutting blade (10) is moved relatively to the crucible (20) in the circumferential direction of the crucible (20) while keeping the cutting blade in the state of piercing the wall. A rim area (25) of the crucible (20) is thus cut off.
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