Orifice plate for use in glass-fiber spinning hearth

Details Orifice plate for use in glass-fiber spinning hearth Orifice plate for use in glass-fiber spinning hearth

1977-07-11

1978-10-24

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

76107S, 425 72S, C03B 3702

Patent

active

041219180

ABSTRACT:
Disclosed is an orifice plate for use in glass-fiber spinning having a number of densely arranged orifices. Each orifice has a larger diameter at the inlet side thereof facing the molten glass and a smaller diameter at the outlet side thereof facing the ambient air. The ratio of the larger diameter to the smaller diameter is so selected to fall within a range between 1 : 0.4 and 1 : 0.9. The reduced diameter of the orifices at their outlet side provides sufficiently large space between adjacent orifices at their outlet sides, in spite of the high density at which the orifices are arranged, so that the joining of glass cones suspended from respective orifices is conveniently avoided even after the brims of the orifices are ground by the viscous cooled molten glass.

REFERENCES:
patent: 3514841 (1970-06-01), Woodward et al.
patent: 3526487 (1970-09-01), Bour
patent: 3905790 (1975-09-01), Strickland

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