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Patent Searching and Data


Title:
METHOD AND DEVICE FOR CUTTING TUBULAR GLASS, AND METHOD FOR MANUFACTURING TUBULAR GLASS
Document Type and Number:
WIPO Patent Application WO/2017/073118
Kind Code:
A1
Abstract:
A method for cutting glass is provided with a heating step for radiating laser light L11 to a portion to be cut CP of a tubular glass G2 and heating the portion to be cut CP, an internal crack region formation step for radiating laser light L12 so as to be focused on the inside of the portion to be cut CP and causing an internal crack region C1 including one or a plurality of cracks to occur by multiphoton absorption in the region irradiated by the laser light L12, and a cooling step for causing a crack to develop inside the portion to be cut CP by cooling the portion to be cut CP.

Inventors:
WADA MASANORI (JP)
IWASAKI TAKANORI (JP)
Application Number:
PCT/JP2016/070581
Publication Date:
May 04, 2017
Filing Date:
July 12, 2016
Export Citation:
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Assignee:
NIPPON ELECTRIC GLASS CO (JP)
International Classes:
B23K26/53; C03B33/095; B28D5/00
Domestic Patent References:
WO2012063348A12012-05-18
Foreign References:
JPH1171124A1999-03-16
JP2003088973A2003-03-25
JPS5939734A1984-03-05
JP2013147405A2013-08-01
JP2008063207A2008-03-21
JP2015157293A2015-09-03
Other References:
See also references of EP 3369715A4
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (JP)
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