| 摘要 |
PROBLEM TO BE SOLVED: To provide a glass fiber manufacturing apparatus and a manufacturing method, which can cool a glass fiber in an excellent cooling efficiency while preventing the occurrence of a deficiency that a glass fiber contacts with a cooling device and breaks.SOLUTION: An apparatus for manufacturing a glass fiber G1 comprises: a heating furnace 2 for heating and softening a glass preform G, and a cooling device 7 for cooling the glass fiber G1 drawn from the glass preform G softened in the heating furnace 2. The cooling device 7 includes a cylindrical cooling pipe 21 having an insertion passage 22 therein for passing the glass fiber G1 advancing in a fiber drawing direction A and adapted to be supplied with a cooling gas in the insertion passage 22. In the cooling pipe 21, the distance normal to the drawing direction A and between the inner face of the insertion passage 22 and the glass fiber G1 is made shorter toward the downstream side of the drawing direction A. |
