Fiber optic cable coloring machines apply UV-curable inks to fibers for identification, ensuring precise, high-speed, and automated coloring and spooling.

Purpose and Function

Fiber optic coloring machines are used to color the surface of optical fibers to enable easy identification of individual fibers within loose tubes or micron cables, which is critical for splicing, installation, and maintenance of fiber optic networks . Coloring is typically done using UV-curable inks, which are applied in a thin, uniform layer without affecting the fiber's optical performance . The process often includes rewinding, ensuring fibers are neatly spooled and tension-controlled to prevent damage .

Key Features

• High-speed operation: Machines can reach speeds up to 3,000 m/min for single-line systems, with multi-fiber color coding options available .
• UV or LED curing: UV or LED lamps cure the ink quickly, providing a smooth, durable coating .
• Automation and control: Modern machines use PLC systems for automated operation, including self-diagnosis, automatic alarming, and stopping in case of faults .
• Tension and placement control: Electromagnetic dancers and belt-type capstans maintain precise fiber tension, while coil and spool scanners ensure accurate fiber placement on reels .
• Multi-fiber capability: Machines can color multiple fibers simultaneously, often in full-color chromatographic patterns for easy identification .

Integration in Production Lines

Fiber coloring machines are part of a fiber optic cable production line, typically following the bare fiber drawing process and preceding secondary coating, SZ stranding, and sheathing . Proper coloring and rewinding ensure signal integrity and prevent installation errors, which is essential for high-quality, reliable fiber optic cables.

Example Specifications

• Speed: Up to 1,800 m/min for some models .
• Tension range: 0.3–1.2 N for single-mode fibers .
• Power requirements: ~AC380V, 50Hz, three-phase .
• Coloring capacity: Approximately 90 km/h .
• Automation: Single operator can manage multiple devices with PLC control . Fiber optic coloring machines are essential for efficient, precise, and high-speed fiber identification, forming a critical step in modern optical fiber manufacturing. They combine UV curing, automated tension control, and multi-fiber handling to ensure consistent quality and reliability in communication networks .