Method and apparatus for bending and tempering glass sheets

Details Method and apparatus for bending and tempering glass sheets Method and apparatus for bending and tempering glass sheets

1997-01-03

1998-05-26

Griffin, Steven P.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65104, 65106, 65114, 65275, 65287, 65356, C03B 23023, C03B 2700

Patent

active

057558450

ABSTRACT:
The invention relates to the press bending and tempering of glass sheets, especially for use as glazings in vehicles. When the press bending system is not located in a heated environment such as a furnace, it is important to maintain the glass sheets at a sufficiently high temperature for an adequate degree of temper to be achieved on quenching the sheet. The present invention provides a method of bending and tempering a thin glass sheet comprising pressing the substantially horizontal sheet between moulds having opposed complementary shaping surfaces, at least one of the surfaces being heated, and subsequently quenching the surfaces of the sheet characterised in that the heated shaping surface is maintained at a temperature in the range from 200.degree. C. to 350.degree. C.

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