| 摘要 |
PURPOSE:To efficiently produce the plastic optical fiber with good workability by cooperatively operating feed rollers, stretching rollers and heat treating rollers by the ratio synchronizing control of the speed ratios of these rollers. CONSTITUTION:The unstretched plastic optical fiber 1 is subjected to contactless heating and stretching-contactless heat treating-taking up by the process having a contactless heating and stretching device, contactless heat treating device and taking up device. The thread guard speed is first gradually increased while the speed ratios between the respective rollers are held constant by the cooperative operation control of a ratio synchronizing control panel 9 until the roller 4 running at the prescribed fiber producing speed attains 50m/min and the rollers 6, 8 attain 100m/min. The stretched plastic optical fiber strand of a prescribed fiber diameter is thus obtd. Since the thread guard operations are executed by the cooperative motions of the ratio synchronizing control system, the troubles arising from a failure in the thread guard and the decrease of the yield are eliminated. The plastic optical fiber is efficiently produced with good workability in this way. |
