Title:
METHOD FOR MANUFACTURING GLASS PLATE
Document Type and Number:
WIPO Patent Application WO/2013/054532
Kind Code:
A1
Abstract:
This method for manufacturing a glass plate includes a melting step, a fining step, and a forming step. In the melting step, molten glass is produced by using at least electrical heating to melt a glass feedstock containing SnO2 as a fining agent. The fining step includes the following: a bubble-removal process in which the temperature of the molten glass is raised to at least 1,630°C so as to generate bubbles therein in order to perform bubble removal; and an absorption process, after the bubble-removal process, in which the temperature of the molten glass is reduced at a rate of at least 2°C/min over the temperature range from 1,600°C to 1,500°C so as to make the molten glass absorb the bubbles therein. In the forming step, a down-draw process is used to form the post-fining-step molten glass into plate glass.
Inventors:
KIMIJIMA TETSUO (JP)
MURAKAMI TSUGUNOBU (JP)
MURAKAMI TSUGUNOBU (JP)
Application Number:
PCT/JP2012/006538
Publication Date:
April 18, 2013
Filing Date:
October 11, 2012
Export Citation:
Assignee:
AVANSTRATE INC (JP)
International Classes:
C03B5/225; C03B5/235; C03B17/06; F27D11/02; G02F1/1333
Domestic Patent References:
| WO2012133467A1 | 2012-10-04 | |||
| WO2010093571A2 | 2010-08-19 |
Foreign References:
| JP2010111533A | 2010-05-20 | |||
| JP2010523457A | 2010-07-15 |
Attorney, Agent or Firm:
GLOBAL IP TOKYO (JP)
Global IP Tokyo patent business corporation (JP)
Global IP Tokyo patent business corporation (JP)
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Claims: