In the fast-evolving wire and cable industry, efficient bunching of fine multi-strand conductors is essential for producing high-quality electronic wires, automotive harnesses, and specialty cables. The RLB Double Twist Bunching Machine (models 315E to 1250) delivers industry-leading performance, combining high rotational speeds, precise lay control, and full automation to meet the demands of modern high-volume production.
Designed for stranding multi-stranded copper wires, tinned wires, enameled wires, and copper-clad aluminum wires, this double-twist buncher achieves exceptional productivity while maintaining uniform lay length, stable tension, and superior surface quality.
Equipment Description
Full-automatic dual-twisting stranding machine adopts PLC + HMI system control. Operators can easily preset lay pitch, lay direction, and take-up tension through the intuitive touch-screen interface. The operation is simple, stable, and highly efficient.
The machine delivers up to twice the output of single-twist systems while maintaining superior conductor integrity and electrical performance.
Brief Technological Process
Pay-off → Double-Twist Bunching Head → Constant Tension Control → Precision Lay Pitch → Automatic Take-up Incoming single wires from pay-off racks (in-line or multi-head) → High-speed double-twist bunching head (100% back-twist) → Advanced tension control system → PLC-controlled lay pitch and direction → Finished compact, bright, high-quality multi-strand bunched conductor wound onto take-up bobbins.
The double-twist mechanism provides two twists per rotation, doubling output compared to single-twist systems while maintaining superior conductor integrity and electrical performance.
A double twist strander to widen the product range of low voltage cables
Core Technical Advantages & Operational Benefits
- Full-Automatic Dual-Twisting Technology: Delivers up to twice the productivity of single-twist systems with consistent lay length and excellent flexibility.
- PLC + HMI Intelligent Control: Simple touchscreen interface for preset lay pitch, lay direction, and take-up tension — real-time monitoring and easy operation.
- Constant Tension Control: Ensures stability from full to empty bobbin, minimizing wire breakage and defects.
- Wide Application Range: Handles ultra-fine wires (Φ0.04 mm) up to larger conductors (Φ3.2 mm) across eight models.
- Flexible Pay-off Configurations: Supports both in-line pay-off racks and double-bobbin multi-head pay-off racks for seamless integration into existing lines.
- Robust & Low-Maintenance Design: Carbon-fiber composite options (select models) and closed safety enclosure with noise isolation improve operator comfort and machine longevity.
These features result in bright, compact, high-quality bunched conductors ready for downstream extrusion, laying-up, or final cable assembly.
Technical Specifications
| Model |
Max. Bobbin Dimension (mm) |
Copper Wire Diameter (mm) |
Sectional Area (mm²) |
Max. OD of Laying Up (mm) |
Lay Range (mm) |
Max. Speed (rpm) |
| 315E |
Φ300 × 180 |
0.04 – 0.1 |
0.25 |
– |
1.15 – 11.24 |
3000 |
| 500A-C |
Φ500 × 320 |
0.08 – 0.32 |
2 |
– |
5.34 – 40.02 |
3000 |
| 500E |
Φ500 × 320 |
0.06 – 0.26 |
1.5 |
– |
2.86 – 44 |
3000 |
| 630C |
Φ630 × 475 |
0.23 – 0.64 |
1.5 – 6 |
– |
26.19 – 75 |
1570 |
| 630P |
Φ630 × 475 |
0.15 – 0.64 |
1.5 – 5 |
– |
15.54 – 73.89 |
2200 |
| 800 |
Φ800 × 600 |
0.25 – 0.8 |
2.5 – 16 |
– |
34.56 – 181.76 |
1200 |
| 1000 |
Φ1000 × 750 |
0.4 – 1.5 |
4 – 20 |
≤Φ12 |
34.55 – 181.76 |
800 |
| 1250 |
Φ1250 × 950 |
1.2 – 3.2 |
70 |
≤Φ22 |
40 – 500 |
650 |
Custom configurations and higher-capacity models available upon request.
Pay-off Options & Layout
Different pay-off devices are selected according to the bunching machine model and pay-off bobbin size:
In-line Pay-off Rack
- Bobbin sizes: Φ100, Φ180, Φ250, Φ300 mm
- Wire diameter: Φ0.08 – 0.4 mm
- Inlet wires: 7, 10, 12, 20, 24, 30, 48 or combinations
Double Bobbin Multi-Head Pay-off Rack
- Bobbin sizes: Φ500, Φ630, Φ800 mm
- Wire diameter: Φ0.15 – 1.41 mm
- Inlet wires: Depends on multi-head wire drawing machine winding number
The flexible configurations ensure seamless integration into your existing production line.
Primary Applications
- Multi-stranded copper and tinned wires for electronic cables and harnesses
- Enameled wires for magnet and winding applications
- Copper-clad aluminum wires for lightweight conductors
- Small-core laying-up for data, control, and communication cables
The machine supports various pay-off options — in-line racks for Φ100–300 mm bobbins or multi-head racks for larger Φ500–800 mm bobbins — allowing seamless integration into existing production lines.
Detailed FAQs
Q1: What wires can the RLB Double Twist Bunching Machine process?
A: Multi-stranded copper wires, tinned wires, enameled wires, copper-clad aluminum wires, and small-core wires (1000/1250 models).
Q2: How does the double-twist technology improve productivity?
A: It provides two twists per rotation, delivering up to twice the output of single-twist systems while maintaining uniform lay length.
Q3: Is operation simple for new operators?
A: Yes. PLC + HMI touchscreen allows preset lay pitch, direction, and tension — operation is simple and intuitive.
Q4: What pay-off options are available?
A: In-line rack (Φ100–300 mm) or double-bobbin multi-head rack (Φ500–800 mm) to match your wire drawing line.
Q5: Do you provide installation and training in Saudi Arabia?
A: Yes. Full turnkey installation, commissioning, English operator training, 24/7 remote support, and local spare parts.
Why Choose RLB Double Twist Bunching Machine?
- Reliable Quality: Every machine is factory-tested for consistent performance and long service life.
- Customized Service: Tailored configurations, pay-off systems, and layout drawings to match your exact factory needs in Saudi Arabia & GCC.
- Long-term Cooperation: Complete installation, training, spare parts supply, remote diagnostics, and performance maintenance contracts.
- Vision 2030 Ready: High-efficiency, low-maintenance technology supporting local cable manufacturing and green energy projects.
Inquiry Now
Contact our technical team today. Within 48 hours we will provide a detailed configuration proposal, ROI calculation, layout drawings, and reference cases from similar GCC projects.
Ready to increase your fine-wire bunching efficiency?
Inquiry Now — Let us deliver the high-speed Double Twist Bunching Machine that powers your cable manufacturing success in Saudi Arabia and the GCC.
Double Twist Bunching Machine
High-speed Double Twist Bunching Machine (315E to 1250 Series) for stranding multi-stranded copper wires, tinned wires, enameled wires and copper-clad aluminum wires. PLC+HMI control, constant tension, and flexible pay-off options.
Product SKU:
DTB-630 / DTB-1000 / DTB-1250
Product Brand:
Reliable Machinery
Product Currency:
USD
Product Price:
Contact for Quote
Product In-Stock:
InStock
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