Glass rod manufacturing method and glass rod manufacturing apparatus
a manufacturing method and glass rod technology, applied in lighting and heating apparatus, furniture, instruments, etc., can solve the problems of difficult to manufacture optical fibers of high quality, problems such as problems often arose, and the inability of the plumb bob to adjust,
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example 1
[0208] A glass rod 106 having a diameter of 60 mm was end-drawn according to the setting values shown in FIG. 43. An AC servomotor of 200 W was used for the tail stock driving motor 275. A rotary encoder that can detect the amount of rotation of the tail stock driving motor 275 was used as the tail stock driving encoder 273. The rotation speed of the tail stock driving motor 275 was controlled by the output of the tail stock driving encoder 273. The moving distance of the tail stock 116 was obtained by measuring the output of the tail stock driving encoder 273. The time required for the end drawing was 15 minutes. The shape of the processed glass rod 106 at the region which was end-drawn was a well formed circular cone shape. The length and the diameter of the region were 61 mm and 60 mm respectively.
example 2
[0209] A glass rod 106 having a diameter of 60 mm was end-drawn according to the setting values shown in FIG. 43. A linear encoder that can detect the moving distance of the tail stock 116 was provided on the tail stock 116. The gas amount and the moving distance of the heating source 122, and the moving speed of the tail stock 116 were controlled based on the moving distance of the tail stock 116 detected by the linear encoder. The shape of the processed glass rod 106 at the region that was end-drawn was a well formed circular cone. The length and the diameter of the region were 65 mm and 60 mm respectively.
[0210] FIG. 44 shows a configuration of the heating source 122 of the glass rod second elongating apparatus 111. The bottom end of the outside pipe 285 of the heating source 122 is closed. The outside pipe 285 is connected to a combustible gas channel 312. This is a channel for hydrogen gas which is an example of a suitable combustible gas. The heating source 122 has a combustib...
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