There are many factors that affect the quality of products. All dyeing machines should strictly control the dyeing process of fabrics. There are many factors that affect the dyeing effect of dyeing machine, such as temperature, concentration and time of dyeing solution. Temperature is one of the factors that affect the dyeing effect.

At present, the temperature control of domestic dyeing machine is mostly manual operation. According to the reading of the thermometer, the workers make a judgment based on experience, and then heat or cool it. As a result, the subjective error is large, and the dyeing process can not strictly follow the process curve of heating, heat preservation and cooling, resulting in more color flowers and color differences on the cloth. In addition, some dyeing plants have carried out automatic temperature control, but they simply control the switch of heating valve and cooling valve. When the temperature reaches the specified value, the corresponding valve will be closed. The temperature control in dyeing process cannot be carried out according to the process curve.

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