Cage Type Core Laying Machine With Back Twist , Electric Wire Stranding Machine 1250/1+1+3

Cage Type Core Laying Machine With Back Twist , Electric Wire Stranding Machine 1250/1+1+3

A laying up machine is a specialized piece of equipment used in the wire and cable manufacturing industry to combine individual insulated cores into a final, multi-core cable. It works by twisting or stranding the cores together and can be used for a variety of cable types, including power cables, control cables, and telephone cables. These machines come in different types, such as drum, bow, or planetary, and often feature advanced control systems like PLC and touch screens for precise operation.

1250/3 bobbin stranding cage

Pay off bobbin size:PN1250

 Max load capacity:3T each bobbin

Max speed :50r/min

 Pitch range:500-3600mm (stepless adjustable on PLC)

Driving motor power: 45KW(AC)

 Back twist structure : planetary gear

The winch is operated through the HMI touch screen, and the programmable controller PLC coordinates and controls the start, stop, jog and other operations of the cage.

The 1250/3 stranding cage is supported by the reduction box and the large bearing seat. The main shaft is a whole piece of high-quality seamless steel pipe, driven by a separate AC variable frequency motor, and has the left and right stranding function. 100% back-twist twisting is realized through the planetary gear mechanism.

The whole machine is designed for high-speed operation, without tugboat load, and runs through the reduction box and the internal bearing of the large bearing seat. The interior of the reduction box is sprayed and lubricated by the oil pump motor; oil supply, lubrication and cooling are circulated through the oil pump motor (patented design).

The back-twist mechanism of the stranding cage adopts planetary gear back-twist, which can withstand large torque.

The cage pre-twisting mechanism is driven by 3 geared motors and can be adjusted online.

The stranding cage is independently driven by a 45KW AC motor with a built-in encoder. The encoder operates in a closed-loop control system and is coordinated and controlled by the programmable logic controller PLC and each unit.

Pay-off tension: The reel frame provides the tension required for pay-off through mechanical belt friction, and the tension can be adjusted manually.

Braking system: winch cage braking through: air pressure brake, frequency converter, braking resistor, etc. are coordinated by PLC to complete the braking process. The entire braking process is synchronized with the whole machine to ensure stable pitch.

There are 12 sets of filling rope pay-off racks at the outlet end of twisted body.

Various protections such as drive motor failure alarm, large bearing over-temperature alarm, circulating oil supply shortage alarm, etc. When a fault occurs, the man-machine interface prompts and displays specific fault information, which is convenient for troubleshooting and maintenance.

Cradle laying up machine overview

A cradle laying up machine uses a rotating cradle (or “basket”) to twist multiple insulated cores—round or sector—into a finished cable with controlled lay length and low residual torsion. Typical machines support 3–7 cores, can apply back‑twist or zero back‑twist, and are widely used for MV/LV power cables, control cables, communication cables, mining cables, and XLPE‑insulated cables​ with or without steel armouring. Cage bobbins are commonly PN800–PN1600 (DIN 46391), with some lines up to PN2000; PLC/HMI control is standard on modern machines

How to size for your application

Define finished cable OD, structure​ (e.g., 1+1+3, 3+3), and whether you need back‑twist​ (planetary) or zero back‑twist.

Match single‑core capability: ensure max single‑wire diameter/section​ is within the machine’s rated range (e.g., single‑core section up to about 300 mm²​ on large frames).

Set haul‑off and capstan: choose a capstan diameter​ and line speed​ consistent with your production target and pull force​ (e.g., capstan Ø up to 2500 mm​ on large frames).

Reel logistics: confirm PN sizes​ for in‑cage bobbins and take‑up to match plant handling.

Control and quality: plan for PLC/HMI​ with tension, pitch, and length control; add in‑line OD/geometry​ and eccentricity monitoring as required.

Typical line configuration and options

Core group: central pay‑off​ with cradle(s); support back‑twist​ or zero back‑twist; cradles can be locked for zero back‑twist when required.

Taping/armouring: non‑metallic​ or metallic taping​ devices; steel wire armouring​ optional; pitch and speed are continuously adjustable.

Metering and traction: meter counter​ + capstan​ sized to line speed and haul‑off force.

Take‑up: column‑type take‑up with traverse​ sized to finished OD​ and drum capacity.

Automation: PLC/HMI​ touchscreen for tension, pitch, and length; recipe storage and interlocks; optional emergency stop​ upgrades

Lead time and procurement notes

Typical lead time: about 90–100 working days​ after deposit for standard configurations; warranty commonly 12 months.

Brands and components: many suppliers offer SIEMENS PLC/HMI, Siemens AC drives, Schneider​ LV components, AIRTAC​ pneumatics; verify final BOM​ with the vendor.

Packaging: seaworthy packing​ suitable for export is standard

The electric control part is composed of operation cabinet, touch screen, etc., and each unit is equipped with corresponding control buttons such as emergency stop, inching, brake release, etc. for easy operation.

The control cabinet is designed with good mechanical performance and dust-proof performance, and is equipped with an appropriate amount of forced ventilation fan.

The power supply is three wire five phase system : 380V(±10%)50HZ.

Total installed power : 110KW

Motor protection function: the electrical control circuit is designed with functions such as phase loss, overload and overheating protection to prevent motor damage.

The alarm fault information can be queried online on the touch screen or Ethernet, with the function of alarm fault storage, and the historical operation information can be set to be deleted only by personnel with management authority.

All drive motors are designed with encoders, and the encoder feedback operates in the closed-loop control system.

The unit adopts PLC for unified and coordinated control operation. Touch screen HMI is adopted for operation. Simple and convenient operation.