Guide

Backtwisting and pre-twisting of conductors: types of stranding equipment and their features

Backtwist is a technological process in which the spool with the workpiece rotates in the opposite direction relative to the twisting element of the machine during one working cycle. This is necessary to reduce internal stresses in the wire that arise during the stranding of conductive cores (CC). Without backtwist, the wire may deform, increasing active resistance, causing losses, and potentially leading to wire breaks or displacement from the lay. Two types of mechanisms are used to ...

Types of tape applicators, purpose, line composition, and technological recommendations

Types of tape application equipments: Central. The tape roller is positioned in a plane perpendicular to the axis of the wrapped product. The axes of the roller and the product coincide. They are manufactured in both vertical designs (for wrapping diameters of up to 8 mm) and horizontal designs (for wrapping diameters of up to 80 mm). The advantage of this winder is its high wrapping speed, while the drawback is that when the wrapping material runs out, the workpiece ...

Conform lines, correct use, configuration and operating principle

The equipment for continuous extrusion by the Conform method is designed for the manufacture of fabricated shape, pins, trapezoidal pins, tubes, bars, flat wire, cable sheaths of optical systems and other long length products.

Calculation of dimensions and weights of cables and wires structural elements

The diameter of a round stranded conductor is equal to the product of the wire diameter and the correction coefficient, that depending on the total amount and wire distribution in the CCC. Dс = Dпр × К. Number of wires in the core Coefficient Number of wires in the core Coefficient Number of wires in the core Coefficient ...

Application of insulation and sheathing made of organosilicon rubber (silicone)

Where cable products with insulation and sheathing made of organosilicon rubber are used?

For the manufacture of thermoresistant and frost–resistant cable products, it’s used special compounded rubber - organosilicon (silicone) rubbers.

Cabling. Selection of cabling equipment

Cabling is a technological operation in which insulated cores are stranding into the round-shaped cable workpiece.

Depending on the working unit structure, there are following types of stranding machines for cabling:

Current-carrying conductor (CCC) manufacturing

Depending on the purpose and operating conditions of cable products, it’s used CCC with different designs.

What materials are used in the CCC manufacturing?

The main materials for CCC manufacturing are copper or aluminum wire.

The application of polymer insulation and sheathing. Selection of extrusion lines for the application of polymer insulation and sheathing

The manufacture of insulated and sheathed cable products made of thermoplastic polymers with using extrusion lines is the most common manufacturing method.