Equipment for optical cable sheathing

Optical cable sheathing equipment includes extrusion lines, stranding machines, and sheathing systems designed to produce high-quality fiber optic cables for indoor, outdoor, and specialized applications.

Overview of Sheathing Equipment

Optical cable sheathing equipment is used to apply protective layers to fiber optic cables, ensuring durability, flexibility, and environmental resistance. The process typically involves extrusion of plastic materials such as PE, PVC, or LSOH over the fiber core, sometimes combined with armoring or strength members for mechanical protection . Sheathing equipment is essential for producing cables like loose tube, tight buffer, ADSS, and FTTH drop cables .

Key Types of Equipment

1. Cable Sheathing Extrusion Lines These machines apply the outer jacket to the fiber cable. They can handle single or dual-layer sheaths, gel-filled or dry designs, and are capable of high-speed production with precise control over diameter and centricity .
2. Stranding and Twisting Machines SZ stranders, single/double twist bunchers, and aramid yarn stranding devices twist fibers or strength members together before sheathing. This ensures low tension fluctuation, stable lay length, and consistent binding tension .
3. Fiber Coating and Coloring Machines These machines apply protective coatings to individual fibers and color them for identification. Coatings can include polyethylene, nylon, or other polymers .
4. Cabling and Bunching Machines These combine multiple fibers or subunits into a single cable structure, preparing it for the final sheathing process .
5. Monitoring and Quality Control Systems Advanced lines integrate real-time fiber length monitoring, tension control, and high-resolution measurement devices to reduce scrap and ensure consistent quality .

Leading Manufacturers and Suppliers

• Rosendahl Nextrom: Offers complete fiber optic cable production solutions, including loose tube production, tight buffering, SZ stranding, and sheathing lines for indoor and outdoor cables .
• HAGSIN: Provides extrusion lines, stranding machines, and complete FTTH and ADSS cable production lines with PLC control and high-speed operation .
• Maillefer: Specializes in extrusion technology for high-quality jacketing, supporting a wide range of plastic materials and cable diameters .
• Dongguan Wirecan Technology: Supplies ADSS fiber production lines, including sheathing, stranding, and coating equipment, with technical support and customization options .

Applications

Optical cable sheathing equipment is used to manufacture cables for:

• Telecommunications and broadband networks
• Power transmission (ADSS cables)
• Indoor installations (tight buffer and patch cords)
• Outdoor and harsh environment applications

Technical Considerations

• Extrusion speed: Typically up to 60 m/min for PE jackets .
• Diameter range: Outer sheaths from 5 mm to 35 mm depending on cable type .
• Material flexibility: Supports LDPE, MDPE, HDPE, PA12, PVC, and LSOH .
• Automation: Modern lines include PLC and IPC control, man-machine interfaces, and remote monitoring . Optical cable sheathing equipment is critical for producing high-performance, durable, and reliable fiber optic cables, and modern systems offer flexibility, high throughput, and integrated quality control to meet diverse industry requirements.