In the production of medium- and high-voltage power cables, robust mechanical protection and excellent flexibility are non-negotiable. The RLB Continuous Interlock Armouring Machine (models RLH-30, RLH-50, RLH-100, RLH-130) delivers industry-leading continuous interlocking steel tape armoring for circular cables. This advanced tangential interlocking system forms a strong, uniform, and flexible armor layer in a single high-speed pass — ideal for underground, submarine, and industrial cables that must withstand crushing, impact, and environmental stress while maintaining excellent bending performance.
Designed for seamless integration into existing stranding, laying-up, or extrusion lines, the RLB continuous interlock armouring machine ensures consistent overlap, minimal material waste, and superior cable quality at rotation speeds up to 1200 RPM.
Working Principle of the Continuous Interlocking Armoring Machine
The machine employs a proven tangential continuous interlocking system: flat steel tape is fed from a payoff stand through a precision forming head that rotates at high speed while the cable core advances linearly. The tape is helically wrapped and mechanically interlocked edge-to-edge with exact overlap (typically 20–30%), creating a strong, flexible armor layer without welding or gaps. Servo-driven controls ensure consistent pitch, tension, and synchronization, while the heavy-duty frame and aerodynamic design minimize vibration for stable operation even at maximum speeds.
Key Engineering Advantages
- Continuous Interlocking Technology: Forms a tight, helical interlocked steel tape armor with precise overlap, providing outstanding mechanical protection without gaps or weak points.
- High-Speed Performance: Maximum rotation speeds from 1200 RPM (RLH-30) down to 700 RPM (RLH-130) deliver exceptional productivity for a wide range of cable diameters.
- Wide Material Compatibility: Handles steel tape widths from 9.5 mm to 25.4 mm and thicknesses from 0.5 mm to 0.8 mm, suitable for galvanized or stainless steel tapes.
- Stable & Reliable Operation: Heavy-duty construction with servo-driven controls ensures smooth, vibration-free running and consistent armor quality from start to finish.
- Flexible Cable Range: Armors circular cables with outer diameters from Φ30 mm up to Φ130 mm, covering most medium- and high-voltage power cable requirements.
These features result in armored cables that meet stringent IEC, GB, and customer specifications for crush resistance, flexibility, and long-term durability.
Technical Specifications
| Model |
Tape Width (mm) |
Tape Thickness (mm) |
Armoured Cable Outer Diameter (mm) |
Max. Rotate Speed (rpm) |
| RLH-30 |
9.5 – 12.7 |
0.5 – 0.8 |
Φ30 |
1200 |
| RLH-50 |
9.5 – 12.7 |
0.5 – 0.8 |
Φ50 |
1000 |
| RLH-100 |
9.5 – 19 |
0.5 – 0.8 |
Φ100 |
800 |
| RLH-130 |
9.5 – 25.4 |
0.5 – 0.8 |
Φ130 |
700 |
RLB Continuous Interlocking Armoring Machine vs Traditional Steel Wire Armor – Performance Comparison
| Feature |
RLB Continuous Interlock Armor |
Traditional Steel Wire Armor |
| Armor Type |
Helical interlocked steel tape |
Stranded steel wires |
| Flexibility & Bend Radius |
Excellent (lighter, more flexible) |
Good but stiffer |
| Crush & Impact Resistance |
Outstanding (uniform layer) |
High longitudinal strength |
| Production Speed |
High-speed single pass (up to 1200 RPM) |
Lower speed, multi-pass |
| Material Waste |
Minimal (precise overlap) |
Higher |
| Weight & Cost |
Lower |
Higher |
| Ideal Applications |
Underground, submarine, MV/HV power |
Heavy-duty pulling applications |
Primary Applications
- Medium- and High-Voltage Power Cables requiring steel tape armoring for mechanical protection
- Underground and Direct-Buried Cables
- Submarine and Offshore Cables
- Industrial and Mining Cables exposed to harsh mechanical conditions
- Fire-Resistant and Armored Control Cables
The continuous interlocking process produces a flexible yet extremely strong armor layer that protects the cable core during installation and throughout its service life, while maintaining excellent bending radius for easier handling and laying.
Why Choose Your Reliable China Interlocking Armouring Machine Manufacturer
With decades of experience as a leading cable machinery supplier, RLB combines German-level engineering precision with practical, customer-driven customization. Every Continuous Interlocking Armoring Machine undergoes rigorous dynamic testing, CE/ISO verification, and factory acceptance before shipment. We focus on reliable quality, technical solutions, customized service, and long-term cooperation—providing full lifecycle support from initial consultation and factory layout design to installation, operator training, spare parts, and remote technical assistance.
Inquiry Now
– Contact our senior technical team today for a detailed proposal tailored to your cable specifications, production volume, and plant requirements. Let us help you upgrade your armoring line with proven, high-performance technology that maximizes output, minimizes costs, and ensures consistent premium cable quality.
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