Method for producing glass sheet with bent portion and glass sheet with bent portion
AssigneeNippon Electric Glass Co., Ltd.
InventorsOsamu Odani, Masayuki Ikemoto, Masahiro Kobayashi, Tomoya Iwakoshi, Masanori Wada
Life of this patent
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Abstract
Provided is a method capable of producing a glass sheet with a bent portion in which a flattened portion has high flatness and high smoothness. A flat glass sheet 20 is radiationally heated with a first portion 21 thereof held between first and second heat-insulating members 31, 32. And then, a second portion 22a, 22b of the flat glass sheet 20 not held between the first and second heat-insulating members 31, 32 is bent.
Claims7
A method for producing a glass sheet with a bent portion, the glass sheet including a flattened portion and the bent portion continued to the flattened portion,
- wherein a flat glass sheet is radiationally heated with a first portion of the flat glass sheet held between and in contact with first and second heat-insulating members and then a second portion of the flat glass sheet not held between the first and second heat-insulating members is bent while the first portion is held between and in contact with the first and second heat-insulating members,
- wherein the flat glass sheet is heated by radiationally heating an entire region of the second portion until the first portion of the flat glass sheet reaches a temperature equal to or higher than a strain point of the flat glass sheet while the first portion is held between and in contact with the first and second heat-insulating members,
- wherein the first and second heat-insulating members include a through hole and a coolant is fed through the through hole to control a temperature of the first and second heat-insulating members holding the first portion so as to avoid a temperature of the first portion from becoming above a softening point of the flat glass sheet, and
- wherein the through hole is provided in an internal portion of the first and second heat-insulating members and is configured to direct coolant to the internal portion of the first and second heat-insulating members.
Dependencies are inferred from the claim text.