Glass manufacturing – Processes – With shaping of particulate material and subsequent fusing...
Patent
1983-11-28
1986-03-18
Bashore, S. Leon
Glass manufacturing
Processes
With shaping of particulate material and subsequent fusing...
65 32, 65115, 65116, C03B 3702
Patent
active
045766223
ABSTRACT:
The invention relates to a glass lathe for producing preforms which may be drawn into energy transmitting fibers. The apparatus includes a head stock and a tail stock for rotatably holding a starter tube and the preform as it is built from the starter tube. The tail stock is movable along the lathe bed with respect to the head stock so that a preform may be drawn down to approximately the diameter of the starter tube. A carriage is provided on the lathe bed which carries at least one burner for melting a particulate quartz feed and depositing it onto the rotating surface of the starter tube. A slide member mounted on the carriage supports a container for catching particulate quartz which does not adhere to the tube and a coolant reservoir adapted to produce a fountain for contacting and cooling the tube downstream of the burner. Layers of silica and doped silica are first deposited on the tube interior by introducing reactant vapors into the tube interior while traversing the length of the starter tube with the burner. Subsequent to the internal deposition step, the OD of the tube is built up by deposition of successive layers of fused quartz by feeding particulate quartz through the burner flame onto the rotating outer tube surface. After building the tubular preform to suitable diameter, it is drawn down to approximately the OD of the starter tube and cut into suitable lengths for use as preforms.
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Bashore S. Leon
Boyer Michael K.
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