The Design of Automatic Temperature Control System for the Dyeing Machine

Abstract

This article analyzed the temperature control system of the dyeing machine in the textile industry, adopted the technology of PLC to automatically control the temperature and realized the automatic temperature adjustment in the work process of the dyeing machine. The spot adjustment proved that this method could fulfill the basic requirement of the dyeing machine to the temperature.Keywords: PLC, Dyeing machine, Temperature 1. The temperature control principle of the dyeing machine The application of automatization technology in the textile industryThe textile machinery manufacturing of China has been quickly developed for almost twenty years and has acquired great achievements, and the technical level and product stability of textile machinery have been fully enhanced. The automatic control of the textile machinery takes the sports control as its core, and is assisted by the textile technical parameters. In recent ten years, the electric power electronic technology, computer control technology and network communication technology have been applied and extended in the control and production management of the textile machinery quickly, which make the mechanical and electronic integration level of China fully enhanced. The intention of the controlThe parameters of the textile technology are numerous, which generally includes temperature, pressure, flux, liquid position, length, speed and displacement. The dyeing technology of the textile has strict requirement of the temperature, and the temperature ascending process, temperature keeping process, temperature descending process of the dyeing trough must accord with the technical requirements, and the manual control is very difficult. If the used machine is the small sample machine, it may bring trouble for the bulk samples. And the production equipments will make the color replay difficultly and induce serious kettle difference, and finally bring unnecessary losses for the production. Therefore, the automatic temperature control of the dyeing machine is very important. The control system is required to freely set up the temperature ascending curve, temperature keeping curve, temperature descending curve, and the operation time, actual temperature and process temperature in the work process can be displayed to ensure the right implementation of the technology. The Structure of the temperature systemThe control objective is the dyeing sample machine, and the structure of its temperature system is seen in Figure 1. The temperature control range of the system is from 20 to 150 centigrade degree, and because the water can not achieve 150 centigrade degree, so the glycerin is adopted. The glycerin can achieve 150 centigrade degree under normal pressure.When the dyeing machine is working, the temperature of the glycerin in the dyeing trough must be changed according to the technical requirements. If the temperature is lower than the set value, the temperature control system should close the heat switch 7, heat glycerin through the heating wire and stop heating unt...

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