Blowing process for expanding a molten glass parison

Details Blowing process for expanding a molten glass parison Blowing process for expanding a molten glass parison

1986-01-24

1987-07-07

Kellogg, Arthur

Glass manufacturing

Processes

Forming product or preform from molten glass

65 76, 65 78, 65 81, 65301, C03B 936

Patent

active

046784926

ABSTRACT:
A molten glass parison is expanded to the shape of a mould cavity (16) to thereby form the parison into an article of glassware (A). Air is supplied under pressure to the interior of the parison so that an elevated pressure is created in the parison causing it to expand. The air under pressure passes through an on/off valve (30) before entering the parison and, during the blowing process, the air supply is interrupted at least twice by turning the valve off. Thus, the pressure is caused to fluctuate, during the blowing process.

REFERENCES:
patent: 3184297 (1965-05-01), Zonneveld
patent: 4553999 (1985-11-01), Ziegler et al.

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