METHOD FOR MANUFACTURING GLASS FIBER STRAND

WIPO Patent Application WO/2018/225570

A1

Provided is a method for manufacturing a glass fiber strand in which a glass fiber strand is formed by bundling a plurality of glass fiber filaments comprising molten glass drawn out from a nozzle, wherein said method for manufacturing a glass fiber strand is capable of detecting breakage of the glass fiber filaments in a more reliable manner. This method comprises: an image capturing step (STEP-1) for generating a plurality of items of image data by continuously capturing images of a plurality of glass fiber filaments f; an image processing step (STEP-2) for extracting, from the image data, a high luminance object 100 having a luminance of a prescribed value or more; and a breakage detection step (STEP-3) for detecting that a glass fiber filament f has broken on the basis of the results of the image processing in the image processing step. In the breakage detection step, the presence of a change in the position of a high luminance object 100 is detected on the basis of the plurality of items of the image data, and it is determined that the glass fiber filament f has broken when a change in the position of a high luminance object 100 is detected.

JP2817865	INDUSTRIAL APPLICABILITY: Optical fiber base material stretching apparatus
WO/1991/014658	METHOD AND APPARATUS FOR THE MANUFACTURING OF A MINERAL FIBRE FELT

YANASE TOMOKI (JP)
NANBU MASARU (JP)

PCT/JP2018/020422

December 13, 2018

May 28, 2018

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NIPPON ELECTRIC GLASS CO (JP)

C03B37/07

JPS5832035A	1983-02-24
JP2005247650A	2005-09-15
JPS5992939A	1984-05-29
JPS5167815U	1976-05-28
JPS56125235A	1981-10-01
JP2017105657A	2017-06-15
JP2018070404A	2018-05-10

YANO INTERNATIONAL PATENT ATTORNEYS OFFICE, P.C. (JP)

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