ASU Optical Cable Production

ASU optical cables are produced using specialized high-speed production lines that integrate stranding, sheathing, and water-blocking processes for aerial self-supporting fiber deployment. Cable Structure and FeaturesASU (Aerial Self-Supporting Unit) optical cables are designed for outdoor aerial distribution networks. They feature an all-dielectric construction with FRP (Fiber Reinforced Plastic) strength members, eliminating the need for grounding and providing immunity to electromagnetic interference.

Key structural components include: Central Strength Member (FRP): Provides high tensile strength while keeping the cable non-metallic. Loose Tube Technology: PBT loose tubes containing optical fibers (up to 144 cores) are stranded around the central member and filled with water-blocking jelly to protect fibers from moisture. Water Blocking System: Dry water-blocking yarns or tapes prevent water ingress.

Outer Sheath (PE): UV-stabilized HDPE jacket protects against sunlight, abrasion, and environmental conditions. Rip Cord: Facilitates easy jacket stripping during termination.

AS

U cables are optimized for spans of 80m to 120m, making them suitable for urban and rural aerial installations.

Production Process

The production of ASU optical cables involves several integrated steps using advanced machinery: Fiber Payoff: 1–12 cores of optical fiber are fed using Danfoss driver-controlled payoffs. Jelly Filling: Loose tubes are filled with water-blocking jelly and air is removed automatically. Electrostatic Cleaning: Impurities on fiber surfaces are removed before extrusion.

Extrusion: High-quality PP/PPT materials are extruded over the fibers using main extruders with Siemens motors. Stranding and Sheathing: Tube and FRP stranding, along with outer sheathing, are performed simultaneously on high-speed lines (up to 90 m/min) controlled by PLC+IPC systems. Cooling and Diameter Control: Warm and cooling water troughs gradually cool the cable, while diameter gauges monitor dimensions in real-time.

Capstan and Take-

Up: Line speed is automatically adjusted, and finished coils are taken up semi-automatically. ApplicationsASU optical cables are ideal for: Campus networks and inter-building connections. Medium and long-distance LAN backbones requiring compact, robust, and self-supporting cables.

Installations alongside power lines without the need for metallic shielding.

Advantages

Lightweight and cost-effective compared to traditional ADSS cables. High mechanical strength due to FRP central members. Water and environmental protection through jelly-filled tubes and HDPE jackets.

Operational efficiency with high-speed, automated production lines.

AS

U optical cable production combines precision engineering, advanced materials, and automated processes to deliver reliable, high-performance aerial fiber solutions suitable for modern telecommunications infrastructure.