Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1992-04-24
1993-09-14
Lindsay, Robert L.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 2, 65 312, 65 181, 65 183, C03B 37075
Patent
active
052444856
ABSTRACT:
The method of manufacturing a silica glass preform comprises the steps of inserting a rod-like member mainly containing a ductile material, into a forming space of a mold, charging the remaining space of the forming space with a forming material containing silica glass powder or doped silica glass powder, compressing the mold charged with the forming material from outside such as to form a porous glass body of the forming material around the rod-like member, removing the rod-like member from the porous glass body, inserting a glass rod into the hole formed after removal of the rod-like member, purifying said porous glass body in which the glass rod is inserted, and consolidating said porous glass body purified in the above purifying step.
REFERENCES:
patent: 4620862 (1986-11-01), Dorn et al.
patent: 4775401 (1988-10-01), Fleming et al.
patent: 4786304 (1988-11-01), Chen
patent: 5185020 (1993-02-01), Satoh et al.
Enomoto Noritsugu
Hihara Hiroshi
Morikawa Takayuki
Oku Masato
Sato Tsuguo
Lindsay Robert L.
The Furukawa Electric Co. Ltd.
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