Process of fabricating an elongated glass body particularly a pr

Details Process of fabricating an elongated glass body particularly a pr Process of fabricating an elongated glass body particularly a pr

1985-02-21

1986-11-04

Schor, Kenneth M.

Glass manufacturing

Processes

With shaping of particulate material and subsequent fusing...

264120, 264332, C03B 1906

Patent

active

046208623

ABSTRACT:
In order to facilitate a shape-keeping compression in a process of fabricating an elongated glass-body, particularly a preform for optical waveguides on the basis of SiO.sub.2 in which, from a powdery glass starting material a porous body is formed and sintered into a glass body, there is provided a process in which the filling of the powdery glass starting material into the compression mold is carried out by simultaneously effecting a precompaction and in which, following the fill-in operation, the pre-compacted powdery material is compressed to obtain the porous body. Steps and measures are proposed for stabilizing the flexible hose which is preferably used as a compression mold, in its shape during the fill-in process. For the filling-in of the material there is used a screw conveyor or an arrangement of several screw conveyors arranged coaxially or next to each other, in order to form a porous body having the desired radial material composition. Differently designed compression molds for fabricating tubular or rod-shaped porous bodies are described.

REFERENCES:
patent: Re20460 (1937-08-01), Jeffery
patent: 2888715 (1959-06-01), Frank
patent: 3092878 (1963-06-01), Conger
patent: 3956452 (1976-05-01), Saito
patent: 4097977 (1978-07-01), Pollner
patent: 4285896 (1981-08-01), Miller
patent: 4401615 (1983-08-01), Gerhardson
patent: 4473526 (1984-09-01), Buhler
patent: 4501601 (1985-02-01), Haupt

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