Method of controlling the diameter of a fiber preform including

Details Method of controlling the diameter of a fiber preform including Method of controlling the diameter of a fiber preform including

1998-04-02

1999-10-19

Hoffmann, John

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

With measuring, controlling, sensing, programming, timing,...

65382, 65381, 65384, 65404, 65435, C03B 37027

Patent

active

059682213

ABSTRACT:
Disclosed is a method of controlling the diameter of a glass rod drawn from a glass preform. The diameter control begins as soon as a glass gob begins to move away from a heated portion of the preform. The velocity of the gob is measured and furnace temperature adjusted to maintain gob velocity at a pre-selected target value. By starting diameter control at this early stage of the process, utilization of the preform is improved as is the utilization of the drawing equipment.

REFERENCES:
patent: 4944783 (1990-07-01), Hongo
patent: 5676725 (1997-10-01), Ito

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