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Rubber sleeve cable technology - Introduction

This topic is about the design and analysis of the rubber sleeve cable continuous curing, when it comes to "curing", I briefly introduce the purpose and significance of "curing". Many excellent polymer insulated cables, such as polyethylene, ethylene propylene rubber, EPDM rubber, polyethylene or three - vinyl acetate copolymer are straight chain thermoplastic material. There is no link between the long chain molecules, BVR电缆easy to move with each other. When the temperature is high to a certain extent, they will occur mechanical deformation, and reduce the working temperature. In order to improve their resistance to temperature, the molecular structure of the straight line can be linked through physical or chemical methods. Become a multiple line structure. After crosslinking, the original thermoplastic elastomer is a thermal elastomer. This crosslinking process is essentially the same as the vulcanization process of the rubber, so it is sometimes called "cross - linking" ".BVR电缆

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The crosslinking method has two types of physical chemistry. Physical method is the use of high-energy particle rays (such as gamma rays) irradiation of linear polymers, in its chain played a number of free radicals, referred to as the contact point. The contact is very active and can be connected to two or more linear molecules. For electric power cable, because of thick insulation, larger diameter, generally do not use physical crosslinking and chemical crosslinking. Chemical crosslinking is a chemical method to direct the chain of PE and EPDM and other thermoplastic linear molecules, through the chemical reaction to cross link, into a three-dimensional network structure. Chemical crosslinking can also be divided into peroxide crosslinking and silane grafting and crosslinking of two kinds of.

With regard to the cable in the curing of the tube in the tube to wipe the problem of the solution, abroad has been a good development. Now there are more than and 10 kinds of crosslinking method characteristics, curing production line has absorbed many advanced technologies including computers, there appeared some kind of high level of automation, good product quality, stable process performance unit, the introduction of a large number of NOKIA, Davis, curing production line of TROESTER and Royal and other foreign famous Equipment Manufacturing Company, standardize the process requirements improve the quality of the products. Through the automatic control software of the computer system, it can greatly reduce the difficulty of process control, and provide a good guarantee for solving the problem of cleaning tube. The suspension controller is a lot of examples, through its control, so that the cable products in the tube in the position of the automatic adjustment, but also make it appear in the operator's eyes. To facilitate further adjustments. The so-called "clean", is vulcanized on the cable vulcanization pipe, as the cable weight will appear the phenomenon of dropping, if this phenomenon appears in front of the vulcanizing tube, the surface of the cable has yet to be fully cured, various properties of rubber has not reached the required degree of frictional resistance is so, the cable and the contact surface of the vulcanizing tube part will appear serious abrasion, the apparent effect of cable products and the use of performance, this phenomenon is not allowed. This issue is followed by the problems in this area, the analysis of the system to find a solution to the problem.

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Our country in recent years the introduction of vulcanization technology, production line of nearly more than 20 over vulcanization technology in China is stagnant situation, shorten the gap between advanced level in the world. With regard to the tube cleaning problems with its own analysis and solutions, especially in recent years, the rapid development of China's cable industry, the need for all aspects of the technology to keep up with. Now the cable products used in particular occasions require the performance of cable products are guaranteed, especially like coal mines, ships,

Electric cable in the place of residence, etc.. So the tube cleaning problems need to be solved urgently.

There are many reasons for cleaning the tube, so the solution is not the same. In this paper, the problem of cleaning tube in water vapor continuous curing unit and CCV production line is analyzed. The solution of cleaning tube of steam continuous curing unit is mainly to control the production of cable, and the temperature and pressure in the process of production. CCV production line and the main line of the layout of the production line, so the layout of the production line has a high demand, it is also very complex analysis.

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In this research, we study the problem of cleaning tube in the above methods. From the layout and production process of the production line are briefly introduced, and find out the reasons and solutions of the drag tube method, so as to improve the production line layout, strengthen the process control of the production process, such as pressure, temperature, time control