Title:
METHOD OF DRAWING GLASS PREFORM FOR OPTICAL FIBER
Document Type and Number:
Japanese Patent JP2020142937
Kind Code:
A
Abstract:
To provide a method of drawing a glass preform for optical fiber in which a glass rod with high external diameter precision can be obtained at low cost.SOLUTION: The present invention relates to a method of manufacturing a small-diameter glass rod by drawing a large-diameter glass preform, and the method comprises: drawing the glass preform which has a transparent glass tapered part at one end of a glass preform straight trunk part and also has a tapered part including an opaque glass part at the other end. Prior to the drawing, a part of the tapered part including the opaque glass part is cut, and a take-up dummy connected to a take-up mechanism of a drawing device is deposited with the cut face at a lower end. The cut face is circular and has an external diameter of 135 to 160 mm.SELECTED DRAWING: Figure 3
Inventors:
MITA REI
Application Number:
JP2019038593A
Publication Date:
September 10, 2020
Filing Date:
March 04, 2019
Export Citation:
Assignee:
SHINETSU CHEMICAL CO
International Classes:
C03B37/027; G02B6/02
Domestic Patent References:
| JP2014019606A | 2014-02-03 | |||
| JP2013147376A | 2013-08-01 | |||
| JP2002274878A | 2002-09-25 | |||
| JP2010059033A | 2010-03-18 | |||
| JP2012076989A | 2012-04-19 |
Attorney, Agent or Firm:
Eiichiro Shimazaki