Optical fiber coloring refers to a process operation in which a certain color of ink is coated on the surface of the natural fiber and cured to maintain strong adhesion.

Its purpose is to facilitate the distinction during connection; to facilitate traceability during line maintenance; to better protect the optical fiber and enhance the mechanical properties of the optical fiber.

In the coloring process, it is necessary to control the points such as pay-off, take-up tension control, line quality, coloring speed, mold base temperature, coloring mold size, ink pressure and curing power.

Overmolding is also the secondary coating of the optical fiber. In order to prevent the optical fiber from directly contacting with the outside world and further protect the optical fiber，it is necessary to effectively protect the optical fiber once coated.

We call this production process overmolding.The purpose of the plastic sleeve is to provide further mechanical protection against compression and tension for the optical fiber;to generate excess length of the optical fiber,so that the optical cable has a certain amount of expansion and contraction, and ensure that the optical cable has superior mechanical, physical and environmental performance.

The key control points of sleeve molding are: take-up and pay-off line tension, production speed, water temperature, casing routing, extruder temperature, grease temperature and pressure, etc.

The layered stranded optical cable is to twist several tight-buffered optical fibers, loose-buffered optical fibers, optical fiber bundles or ribbon optical fibers with strength members, water-blocking materials, tying yarns and other components according to certain rules to form a layered stranded structure optical cable core. a process operation.

The cabling of the skeleton optical cable is different from the layer-stranded optical cable. The cabling of the skeleton optical cable is to rotate the optical fiber, the optical fiber ribbon or the loose tube into the skeleton groove. The purpose of cabling is to increase the flexibility and bendability of the optical cable, improve the tensile strength of the optical cable and improve the temperature characteristics of the optical cable.

The key control points of cabling are: take-up and pay-off tension, production speed, stranding pitch, stranding angle, yarn tying tension, yarn tying pitch and stranding die, etc.

In order to protect the cable core from external mechanical, thermochemical, moisture and biological bites after the optical fiber is cabled, the operation process of extruding a layer of sheath outside the cable core is the sheath. There must be a jacket on the outside of the fiber optic cable core, or even an outer jacket to protect it.

The key control points of the sheathing process are mainly the tension of the take-up and release line, the mold, the pulling speed, the vacuum degree, the water temperature, the temperature of the extruder, and the routing of the optical cable (yarn, steel wire, etc.).