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Specifications of optical cable outer sheath extruder

An optical cable outer sheath extruder is designed to coat optical cable cores with protective polymer sheaths, offering precise control over diameter, thickness, and material properties.Core Function

The extruder continuously melts and applies polymer materials such as PE, PVC, LSZH, TPU, LDPE, MDPE, or HDPE onto the optical cable core, forming a uniform protective layer that provides mechanical protection, electrical insulation, and identification markings for the cable .

Key Specifications
  • Finished Outer Diameter: Typically ranges from 2.8 mm to 35 mm, depending on cable type and extruder model .
  • Extruder Screw Diameter: Commonly 90 mm or 120 mm, with precision screw and barrel systems for uniform extrusion .
  • Cable Types Supported: Central tube, stranded, ribbon, loose tube, parallel twin wire, and medium messenger aerial cables .
  • Production Length: Continuous extrusion up to 40 meters or more, with high-speed take-up systems .
  • Material Compatibility: Supports single or composite sheaths, including PE outer sheath, aluminum-plastic compound belts, steel-plastic compound belts, and PE composite sheaths .
Control and Automation
  • Temperature Control: PID smart controllers (e.g., Omron) ensure precise polymer melting .
  • Tension Control: Advanced double-wire tension controllers prevent core damage during extrusion .
  • PLC and HMI: Industrial PLCs with color touchscreens (Siemens or equivalent) allow real-time monitoring, parameter adjustment, and fault diagnostics .
  • Precision Parameters: High accuracy in sheath thickness, outer diameter, concentricity, and adhesion .
Auxiliary Equipment
  • Pay-Off System: Heavy-duty stands for smooth cable core release, with tension control to prevent fiber damage .
  • Core Straightening Devices: Optional units to remove natural curvature from reels before extrusion .
  • Cooling and Take-Up Systems: Water baths or air cooling, combined with large-capacity take-up reels for continuous production .
  • Optional Printing Units: For cable identification, meter marks, and branding .
Performance and Reliability
  • High Efficiency: Capable of long-length continuous production at high speeds .
  • Strong Adaptability: Handles indoor, outdoor, direct burial, and aerial cables .
  • Mechanical Protection: Ensures resistance to tension, crushing, impact, and bending during installation .
  • Electrical Insulation: Especially important for metal-armored optical cables .
Brands and Components
  • Motors: Siemens
  • Transducers: Emerson
  • Bearings: NSK or equivalent
  • Electrical Parts: Siemens, Omron, Schneider
  • Screw and Barrel: Jinhu Company This combination of precision control, material versatility, and robust auxiliary systems ensures that optical cable outer sheath extruders produce high-quality, defect-free sheaths suitable for a wide range of fiber optic applications.
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