7 core/19core copper/aluminum double twist stranding machine take-up 1250mm, 1600mm

Application

Our double twist stranding machine is capable of twisting multi-strand bare copper, aluminum, and aluminum alloy wires up to 19 cores. It is widely used in the production of power cables, control cables, and communication cables. 

Key Features

1. It can achieve a line speed of up to 150 m/min, significantly improving production efficiency compared to traditional tubular stranding equipment.

2. A high-tech temperature control system, combined with a powerful compressor, enables non-stop operation even at full capacity—this is a critical advantage for the double twist stranding machine to maintain consistent performance in long-term production.

3. A pair of carbon-fiber bows offer additional stiffness and lightness, as well as superior stability over single-bow variants. This design reduces machine vibration during high-speed operation.

4. An intelligent communication module reduces the number of circuits, simplifying the system structure and lowering the risk of electrical failures in the double wist strander.

5. The servo motor can save up to 15% of energy, helping to reduce overall operational costs while maintaining high productivity.

Technical Specification

Production Line Composition

The standard configuration of the double twist stranding machine includes:

1. Pay-off stand (normally 7-head up to 19-head): Used to stably hold and release raw wire spools.

2. Tension stand: Ensures consistent tension of each wire during the stranding process, preventing wire breakage or uneven stranding.

3. Rotary wire assembly rack (where wires come together and form one strand): Aligns and combines multiple wires before they enter the stranding host.

4. Stranding host (which holds the take-up bobbin and where the actual rotation happens): The core component of the double twist stranding machine that completes the twisting of multiple wires into a single conductor.

Terms and Conditions

• Price terms: FOB, C&F or CIF

• Production period: 30-60 days

• Warranty: 1 year (excluding damages caused by human factors)

Q&A

Q1: Why are there many single-bow variants on the market? What is the difference?

Ans: Hopda’s double twist stranding machine is designed with a pair of stranding bows instead of just one. This design allows it to maintain good stability even when operating at high rotation speeds. Many other double twist buncher models only have one stranding bow, which means the machine vibrates heavily when running at high speeds—this not only affects stranding quality but also shortens the machine’s service life.

Q2: What material is used for the stranding bows?

Ans: In addition to the double-bow design, we use carbon fiber as the material for the stranding bows of our double twist bunching machine. Carbon fiber has better stiffness and is much lighter than spring steel (a material commonly used in other manufacturers’ products). A high rotation speed means the bows need to withstand large centrifugal force, and carbon fiber performs exceptionally well in such scenarios, ensuring long-term durability and stable operation.

Q3: How can the machine maintain a constant operating speed of 140 meters per minute?

Ans: When the double twist buncher runs continuously at such a high speed, cooling the main shaft becomes a key challenge. We have equipped our machine with special bearings and an intelligent oil cooling system, which effectively dissipates the heat generated during operation. This ensures the machine does not overheat even when operating near its maximum capacity, allowing it to maintain a constant line speed of 140 m/min.

Q4: What after-sales support do you provide for the double twist bunching machine?

Ans: We offer comprehensive after-sales support for the double twist bunching machine, including:

• Warranty: A 12-month free warranty for the entire machine (excluding wearing parts—we provide spare parts in the initial delivery to minimize downtime).

• Technical support: 24/7 online consultation (via email, phone, or video call) to help resolve common issues, such as uneven double twist stranding and abnormal noise.

• Spare parts supply: We keep stock of core parts (such as motors and control panels) to ensure quick delivery, keeping your production operations on track.

• On-site service: If the machine encounters major faults that cannot be resolved remotely (e.g., transmission system issues), our engineers will provide on-site maintenance. Service fees are waived during the warranty period; after the warranty, only travel expenses will be charged. We also offer training for your team to help them handle routine machine maintenance.

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1250 model:

1600 model: