Invention Grant
- Patent Title: Method for manufacturing glass material and device for manufacturing glass material
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Application No.: US15316590Application Date: 2015-05-29
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Publication No.: US10730782B2Publication Date: 2020-08-04
- Inventor: Tomoko Yamada , Fumio Sato
- Applicant: NIPPON ELECTRIC GLASS CO., LTD.
- Applicant Address: JP Shiga
- Assignee: NIPPON ELECTRIC GLASS CO., LTD.
- Current Assignee: NIPPON ELECTRIC GLASS CO., LTD.
- Current Assignee Address: JP Shiga
- Agency: Keating and Bennett, LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@28ae9a06 com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@7539d6a9
- International Application: PCT/JP2015/065618 WO 20150529
- International Announcement: WO2015/190323 WO 20151217
- Main IPC: C03B32/00
- IPC: C03B32/00 ; C03B40/04 ; C03B19/02 ; C03B19/10

Abstract:
Provided is a method that can manufacture a glass material having excellent homogeneity by containerless levitation. A block (12) of glass raw material is heated and melted by irradiation with a plurality of laser beams with the block (12) of glass raw material held levitated, thus obtaining a molten glass, and the molten glass is then cooled to obtain a glass material. The plurality of laser beams include a first laser beam (13A) and a second laser beam (13B). A size (θ) of an angle formed between the first laser beam (13A) and the second laser beam (13B) is 0° or more but less than 180°. A center (C1) of a spot (S1) of the first laser beam (13A) on the surface of the block (12) of glass raw material and a center (C2) of a spot (S2) of the second laser beam (13B) on the surface of the block 12 of glass raw material are different from each other.
Public/Granted literature
- US20170158549A1 METHOD FOR MANUFACTURING GLASS MATERIAL AND DEVICE FOR MANUFACTURING GLASS MATERIAL Public/Granted day:2017-06-08
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