Title:
METHOD FOR MANUFACTURING GLASS MATERIAL AND DEVICE FOR MANUFACTURING GLASS MATERIAL
Document Type and Number:
WIPO Patent Application WO/2015/190323
Kind Code:
A1
Abstract:
Provided is a method whereby a glass material having excellent homogeneity can be manufactured by a containerless float method. In a state in which a glass raw material lump (12) is floated and retained, the glass raw material lump (12) is irradiated with a plurality of laser beams and thereby heated and melted, and molten glass is obtained, after which a glass material is obtained by cooling the molten glass. The plurality of laser beams include a first laser beam (13A) and a second laser beam (13B). The size (θ) of the angle between the first laser beam (13A) and the second laser beam (13B) is from 0° to less than 180°. The position of the center (C1) of a spot (S1) of the first laser beam (13A) on the surface of the glass raw material lump (12) and the position of the center (C2) of a spot (S2) of the second laser beam (13B) on the surface of the glass raw material lump (12) are mutually different.
Inventors:
YAMADA TOMOKO (JP)
SATO FUMIO (JP)
SATO FUMIO (JP)
Application Number:
PCT/JP2015/065618
Publication Date:
December 17, 2015
Filing Date:
May 29, 2015
Export Citation:
Assignee:
NIPPON ELECTRIC GLASS CO (JP)
International Classes:
C03B8/00; C03B19/00
Domestic Patent References:
| WO2008032789A1 | 2008-03-20 | |||
| WO2010071202A1 | 2010-06-24 |
Foreign References:
| JP2006248801A | 2006-09-21 | |||
| JP2015129061A | 2015-07-16 |
Attorney, Agent or Firm:
NAKAYAMA, KAZUTOSHI (JP)
Kazutoshi Nakayama (JP)
Kazutoshi Nakayama (JP)
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