Mould assembly for bending difficult bending shapes in a glass s

Details Mould assembly for bending difficult bending shapes in a glass s Mould assembly for bending difficult bending shapes in a glass s

1991-11-08

1993-02-09

Woodward, Joye L.

Glass manufacturing

With fluid support for article or preform

Gaseous support

65273, 65287, C03B 23023

Patent

active

051850222

ABSTRACT:
The invention relates to a method for bending difficult bending shapes such as an S-shape in a glass sheet. The downward bending of an outline-mould supported, heated glass sheet is assisted by a non-engaging lower partial surface mould used for blowing to a bending line (BL) or its vicinity a gas having a temperature at least equal to that of glass, the gas serving simultaneously as a glass carrier preventing its falling or excessive downward sagging. Blasting orifices in the shaping surface are adapted to concentrate heating on the most problematic areas of a bending line.

REFERENCES:
patent: 3223443 (1965-12-01), Misson
patent: 3468645 (1969-09-01), McMaster et al.
patent: 3526489 (1970-09-01), McPhail
patent: 3756797 (1973-09-01), Akeyoshi et al.
patent: 4508556 (1985-04-01), Bennett et al.
patent: 4767437 (1988-08-01), Lampman et al.
patent: 4828598 (1989-05-01), Imamura et al.
patent: 4979977 (1990-12-01), Frank et al.

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