Apparatus and method for improved optical glass GOB preform prod

Details Apparatus and method for improved optical glass GOB preform prod Apparatus and method for improved optical glass GOB preform prod

1997-05-30

1999-05-04

Griffin, Steven P.

Glass manufacturing

Processes

Discharging molten glass downwardly through orifice

65127, 65324, 65325, 65375, C03B 700, C03B 708

Patent

active

059000333

ABSTRACT:
A gob formation device and method for improved production of molten glass preforms for use in the precision glass molding of optical glass elements. The device is a dispensing tip which is attached to a stem extending from a working crucible containing a supply of molten glass. The dispensing tip includes a longitudinal bore through which the molten glass flows, and a downwardly projecting gob formation surface located at a distal end of tip. The downwardly projecting gob formation surface is preferably convex which aids in achieving greater uniformity of mass in the gob formation process as well as improving preform internal quality.

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