Electrical equipment wire and cable manufacturers: wire and cable process and structural characteristics
Electrical equipment with wire and cable manufacturers: understand the process of wire and cable. The main insulation material and protective layer material of plastic wire and cable are plastic. Thermoplastic has excellent performance and good processing performance. Especially when it is used for the production of wire and cable extrusion insulation layer and protective layer, the process is simple and convenient. The basic method of producing wire and cable plastic insulation layer and protective layer is continuous extrusion with a single screw extruder.
Because the extruder has the characteristics of continuous extrusion, the production process of plastic insulation and sheath is also continuous. As far as wire and cable production is concerned, the differences in product specifications and extrusion components often determine some changes in extrusion equipment and process parameters, But generally speaking, the extrusion coating process of various products and parts is similar. The extrusion principle, process and die types are introduced below, mainly for general use, supplemented by individual ones.
The working principle of the extruder is: use a screw of a specific shape to rotate in a heated barrel to extrude the plastic sent from the hopper forward, so that the plastic is uniformly plasticized (ie melted), and extruded into the required die. Various shapes and different shapes of continuous plastic layers are then extruded and wrapped on the wire core and cable.
The plastic insulation and sheath of the wire are carried out through continuous extrusion. The extrusion equipment is generally a single screw extruder. Before the plastic is extruded, check whether the plastic is wet, and then preheat the screw and add it to the hopper. During the extrusion process, The plastic in the hopper enters the barrel by gravity or the feeding screw, and under the thrust of the rotating screw, it continues to advance, gradually moving from the preheating section to the homogenization section.
Electrical equipment wire and cable manufacturers: structural characteristics of wire and cable products
Most of them are products and strips with exactly the same cross-sectional (cross-sectional) shape (ignoring manufacturing errors), which are determined by the characteristics used as circuits or coils in the system or equipment. Therefore, to study and analyze the structural composition of cable products, it is only necessary to observe and analyze from its cross-section.
The structural components of wire and cable products can generally be divided into four main structural components: conductors, insulating layers, shielding and protective layers, filling elements and tensile elements. According to the product's use requirements and applications, some product structures are extremely simple.
In a sense, the wire and cable manufacturing industry is an industry of material finishing and assembly. First, the material consumption is huge, and the material cost in cable products accounts for 80-90% of the total manufacturing cost. Second, there are many types and varieties of materials used, and the performance requirements are particularly high. For example, copper for conductors requires copper purity of more than 99.95, and some products require oxygen-free high-purity copper, the choice 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 also closely related to whether materials can be scientifically saved in material selection, processing and production management. Therefore, the design of wire and cable products must be carried out at the same time as the selection of materials. Generally, several materials are selected and determined after screening tests of process and performance.
The electric wire and cable manufacturers for electrical equipment have explained here. Thank you for watching.
What are the main points of purchasing wires and cables? Let's take a look. As the main carrier of power transmission, wire and cable are widely used in electrical equipment, lighting circuits, household appliances, etc. Its quality directly affects the quality of the project and the safety of consumers' lives and property. There are many wire varieties on the market, and appropriate wires should be used according to their own power load.
What are the precautions for wires and cables? Let's take a look. Common cable faults: wire surface markings-according to national standards, the wire surface should have continuous markings of the manufacturer's name, product model and rated voltage. This helps to find the manufacturing plant in time when there is a problem during the use of the wire, and consumers should pay attention to this when buying the wire.
There are many kinds of wire and cable products for electrical equipment on the market, which are difficult for ordinary consumers to distinguish. So what are the main categories of wire and cable products? What are the product naming principles of wire and cable? The editor brings you a brief understanding of relevant content knowledge.
The wires and cables for electrical equipment are mainly used for internal or external connection of electrical equipment, low-voltage transmission lines and various electrical signal transmission lines. Generally speaking, except for power cables, communication cables and magnet wires, most insulated wires and cables are classified as wires and cables for electrical equipment.
Electrical equipment with wire and cable is a large class of wire and cable products, a wide range of applications, many varieties, many series, large output, process type complex. The rated voltage of wires and cables for electrical equipment is low, and the working voltage is 450/750v and below, which is not more than 0.6/1kv. The working voltage of signal and instrument cables is usually 300/500v and below. The ampacity of the cable is determined according to the requirements of the cable.
Low voltage power cable winter pay attention to matters? As the weather gets colder and colder, manufacturers of low-voltage power cables usually become more difficult, which brings inconvenience to construction. Here are some precautions for winter construction. Let us take a brief look.