The vast majority of wire and cable products are products with the same cross-section (cross-section) shape (ignoring the error caused by manufacturing) and in long strip shape, which is determined by the characteristics used in the system or equipment as forming lines or coils. Therefore, research and analysis of the structure of cable products, only from its cross-section to observe and analyze.
As a whole, the structural components of wire and cable products can be divided into four main structural components: conductor, insulating layer, shielding and protective layer, as well as filling element and bearing element. According to the use requirements and application occasions, some products have very simple structure.
2. Cable material
In a sense, wire and cable manufacturing industry is a material finishing and assembly industry. The first is that the material consumption is huge, and the material cost of cable products accounts for 80-90% of the total manufacturing cost; the second is that the types and varieties of materials used are very many, and the performance requirements are particularly high. For example, the purity of copper is required to be above 99.95% for copper conductor, and oxygen free high-purity copper is required for some products; Third, the selection of materials will have a decisive impact on the manufacturing process, product performance and service life.
At the same time, the benefits of wire and cable manufacturing enterprises are closely related to the selection, processing and production management of materials.
Therefore, in the design of wire and cable products and material selection at the same time, generally take the selection of several materials, through the process and performance screening test to determine.
Materials for cable products can be divided into conductive materials, insulating materials, filling materials, shielding materials and protective layer materials according to their use parts and functions. But some of these materials are common to several structural members. In particular, thermoplastic materials, such as polyvinyl chloride and polyethylene, can be used on insulation or sheath as long as part of the formula is changed.
The materials used in the manufacture of cable products involve a wide range of categories and specifications (brands).
3. Name and material of product structure
(1) Lead wire: the basic and essential main component of current or electromagnetic wave information transmission function.
Main materials: conductor is the abbreviation of conductive wire core, which is made of copper, aluminum, copper clad steel, copper clad aluminum and other non-ferrous metals with excellent conductivity, and optical fiber is used as conductor.
There are bare copper wire, tinned wire; single branch line, stranded wire; twisted tin wire.
