Rittal Cables – an introduction to the process characteristics of cables

1. The impact of large-length continuous superposition combined production mode on the production of wires and cables is global and controllable, which involves and affects:

(1) Production process and equipment layout

All kinds of equipment in the production workshop must be reasonably discharged according to the process flow required by the product, so that the semi-finished products at each stage can be circulated sequentially. The equipment configuration should consider the different production efficiency and balance the production capacity, and some equipment may have to be configured with two or more units to balance the production capacity of the production line. Therefore, the reasonable selection and combination of equipment and the layout of the production site must be balanced and comprehensively considered according to the product and production volume.

(2) Production organization and management

Production organization and management must be scientific and reasonable, careful and accurate, strict and meticulous, the operator must be meticulous in accordance with the process requirements of the implementation, any link problems, will affect the smooth flow of the process, affect the quality of the product and delivery. Especially for multi-core cables, if the length of a certain pair or basic unit is short, or if there is a quality problem, the entire cable will not be long enough, resulting in scrapping. Conversely, if a cell is too long, it must be sawn away and wasted.

(3) Quality management

The production method of continuous superposition and combination of large lengths makes any link in the production process and a little problem occur instantaneously, which will affect the quality of the entire cable. The more quality defects occur in the inner layers and are not detected in time to terminate production, the greater the losses will be. Because the production of wires and cables is different from assembled products, they can be disassembled and reassembled and replaced with other parts; The quality problem of any part or process of the wire and cable is almost irreparable and irreparable for this cable. The after-the-fact treatment is very negative, either sawing or downgrading, or scrapping the entire cable. It cannot be taken apart and reassembled.

The quality management of wires and cables must run through the entire production process. The quality management and inspection department should inspect the entire production process, self-inspection of operators, and mutual inspection of upper and lower processes, which is an important guarantee and means to ensure product quality and improve the economic benefits of enterprises.

2. There are many types of production processes and large material flow

Wire and cable manufacturing involves a wide range of processes, from non-ferrous metal smelting and pressure processing, to plastics, rubber, paint and other chemical technologies; Textile technology such as wrapping and weaving of fiber materials, to metal wrapping and longitudinal wrapping of metal strips, and metal forming processing technology for welding.

The various materials used in the manufacture of wires and cables not only have many categories, varieties and specifications, but also a large quantity. Therefore, the dosage, reserve amount, batch cycle and batch size of various materials must be approved. At the same time, the decomposition, recycling, reuse and waste disposal of waste products are an important part of management, and we should do a good job in material quota management and pay attention to conservation.

In the production of wires and cables, from the entry and exit and storage of raw materials and various auxiliary materials, the flow of semi-finished products in each process to the storage and delivery of products, the material flow is large, and it must be reasonably laid out and dynamically managed.

3. There are many special equipment

The wire and cable manufacturing uses special production equipment with the characteristics of the industry's process to adapt to the structure and performance requirements of cable products, and to meet the requirements of large-length continuous and high-speed production as much as possible, thus forming a series of special equipment for cable manufacturing. Such as extrusion machine series, wire drawing machine series, stranding machine series, stapling machine series, etc.

The manufacturing process of wires and cables and the development of special equipment are closely related and promote each other. new process requirements to promote the generation and development of new special equipment; In turn, the development of new special equipment has promoted the promotion and application of new processes. Such as wire drawing, annealing, extrusion tandem wire; Special equipment such as physical foaming production line has promoted the development and improvement of wire and cable manufacturing process, and improved the product quality and production efficiency of cables.

Second, the main process of wire and cable wire and cable is made through three processes: drawing, twisting and coating, the more complex the model and specifications, the higher the repeatability.

1. Pulling

In metal pressure machining. The technical processing method of forcibly passing the metal through the die (pressure wheel) under the action of external force, the metal cross-sectional area is compressed, and the shape and size of the required cross-sectional area are obtained.

The drawing process is divided into: monofilament drawing and stranding drawing.

2. Stranding

In order to improve the flexibility and integrity of wires and cables, two or more single wires are intertwined in a specified direction, which is called stranding.

Stranding process is divided into: conductor stranding, cable formation, braiding, steel wire armor and winding.

3. Wrapping

According to the different performance requirements of wires and cables, special equipment is used to coat the conductor with different materials. Coating process is divided into:

A. Extruded bag: rubber, plastic, lead, aluminum and other materials.

B. Longitudinal bag: eraser, wrinkled aluminum strip material.

C. Wrapping: ribbon-like paper tape, mica tape, alkali-free glass fiber tape, non-woven fabric, plastic tape, etc., linear cotton yarn, silk and other fiber materials.

D. Dip coating: insulating paint, asphalt, etc

Rittal Cables – an introduction to the process characteristics of cables

Rittal Cables – an introduction to the process characteristics of cables

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