| 摘要 |
PURPOSE:To apply uniform coating layer to an optical fiber, by applying a resin composition to an optical fiber passing through a spray-coating chamber having a ventilation hole at a part of the chamber. CONSTITUTION:The spray coating chamber 7 is a double-chamber made of the inner chamber 8 and the outer chamber 9, and an optical fiber 2 is passed vertically downward through the holes 10 and 11 opened at the top and the bottom walls of the chamber 7. The spraying hole 12 of a sprayer 3 is formed horizontally to both the inner chamber 8 and the outer chamber 9. The spray of the resin composition ejected from the sprayer 3 is introduced into the inner chamber 8 through the hole 12, and made to collide with the optical fiber to form a resin coating layer. The spray of the resin composition which has passed by the optical fiber 2 reaches the side wall of the inner chamber 8. An exhaustion hole 13 is opened to the side wall at the position to receive the spray stream. The stream is passed through the exhaustion hole 13, made to collide with the wall of the outer chamber 9, dispersed in the space between the inner chamber 8 and the outer chamber 9, and recovered. |
