Invention of automatic control of pre shrinking machine

The traditional control method of pre shrinking machine is that in the process of driving, the weaving process is to measure a certain length before wetting and mark it. After the fabric passes through the finishing combined machine of the pre shrinking machine, the length of the fabric is measured, and then the current pre shrinkage rate is calculated. If the process requirements are not met, the rubber blanket pressure or speed can be adjusted according to the working experience Measurement work. In the process of measurement, the fabric will be pulled by man-made factors, such as the measurement of subjective factors, there is a large error, especially in the measurement of the interval length will cause the number of unqualified increase. Generally, in order to ensure the reputation of the enterprise and avoid the return of goods, the contract requires the shrinkage rate to go online, which leads to the consumption of energy such as cloth steam, which makes the production cost rise sharply.

In order to eliminate the defects of traditional technology, the automatic control method of shrinkage rate of pre shrinking finishing combined machine is designed. When the difference between the actual pre shrinkage rate and the rated pre shrinkage rate is within ± 0.2%, the speed of cloth discharge remains unchanged. When the actual pre shrinkage rate is greater than 0.2% of the rated shrinkage rate, the control device outputs control signal to speed up the cloth delivery speed until the actual pre shrinkage ratio is less than 0.2% of the rated shrinkage rate When the difference of rated pre shrinkage is within ± 0.2%, the feeding speed is consistent with the discharging speed.

The pre shrinkage rate automatic control mode of the pre shrinking machine realizes the pre shrinkage rate of the pre shrinking machine from artificial fuzzy control to accurate automatic control, reduces the influence of human factors, improves the detection and control accuracy of fabric shrinkage, improves the qualified rate of products and reduces the labor intensity. And then reduce the energy consumption and production costs, improve the competitiveness of the pre shrinking machine.

Editor: HX