TUBE GLASS CUTTING METHOD AND CUTTING DEVICE, AND TUBE GLASS PRODUCT MANUFACTURING METHOD

Title:

TUBE GLASS CUTTING METHOD AND CUTTING DEVICE, AND TUBE GLASS PRODUCT MANUFACTURING METHOD

Document Type and Number:

WIPO Patent Application WO/2016/208248

Kind Code:

A1

Abstract:

In this method for cutting a tube glass G1, the tube glass G1 is irradiated with a laser light L that is focused inside the tube glass G1, and an inner crack region C1 which includes one or multiple cracks is formed on a portion of the tube glass G1 in the circumferential direction thereof due to multiphoton absorption that occurs in the irradiation region of the laser light L, and stress is generated in the tube glass G1 to promote the cracks in the inner crack region C1 to develop in the circumferential direction of the tube glass G1 in order to develop the cracks throughout the entire circumference of the tube glass G1 and consequently cut the tube glass G1.

Inventors:

WADA MASANORI (JP)
INOUE MASATO (JP)

Application Number:

PCT/JP2016/060308

Publication Date:

December 29, 2016

Filing Date:

March 30, 2016

Export Citation:

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Assignee:

NIPPON ELECTRIC GLASS CO (JP)

International Classes:

C03B33/06; B23K26/53; B28D5/00

Foreign References:

JPH1171124A	1999-03-16
JP2002205181A	2002-07-23
JP2007167875A	2007-07-05
JP2007099587A	2007-04-19
JPH05193969A	1993-08-03
JPS6126530A	1986-02-05
JPS5939734A	1984-03-05

Other References: