Automatic liquid feeding method for dyeing processes of multi-component dyes

Abstract

The invention relates to an automatic liquid feeding method for dyeing processes of multi-component dyes. In the dyeing process of the multi-component dye A, concentrations of all the dyes in dye liquid are monitored online and real-timely; after the percentage of the mass of each dye to the total mass of the dyes is calculated according to the concentrations of all the dyes in the dye liquid, thepercentages of all the dyes are input into the same BP neural network model simultaneously, K0 values of all the dyes are output by the BP neural network model, and an absolute value of the difference obtained by subtracting the minimum value from the maximum value of the K0 values is D<max>; the change rate of D<max> relative to D<max><0> is calculated, the change rate is compared with a threshold value, and if the change rate is smaller than the threshold value, no dye liquid is replenished; otherwise, the dye liquid is replenished till the concentrations of all the dyes are equal to initial concentrations. The automatic liquid feeding method is simple, by monitoring the concentrations of all the dyes in the dye liquid online and real-timely, the dyeing result approaches to the target effect to the utmost extent, on-line feedback control is achieved, the quality of dyed products is improved, the dyeing one-time success rate is increased, and the better dyeing effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of dyeing online automatic control in the printing and dyeing industry, and relates to an automatic liquid supply method in the dyeing process, in particular to an automatic liquid supply method in the dyeing process of multi-component dyes. Background technique [0002] During the dyeing process, the dyeing stability has a great relationship with the instantaneous synchronous dye uptake rate of the dye in the dye solution tank, especially for multi-component dye color matching, the stability of the dyeing shade is closely related to the multi-component dye during this period. The synchronous dyeing rate within the time has a great relationship, the synchronous dyeing rate is consistent, the stability of the dye is better, and the change of the head-to-tail color difference is small, otherwise the head-to-tail color difference may occur. Therefore, it is an important direction to improve dyeing technology an...

AI Technical Summary

Problems solved by technology

However, in the actual color matching process, due to the interaction between dyes or other factors, the instantaneous dyeing rate of dyes is affected, which leads to changes in the compatibility of dyes.

Domestic online monitoring of dye concentration in the dyeing process is mainly carried out by UV spectrophotometer, and the UV spectrophotometer used in the quantitative analysis of the concentration of multi-component dye solution is complicated in the calculation process, resulting in large error in the results, making it possible to detect The concentration range is narrow, especially for the blending of dyes with similar structures or colors, and the ultraviolet spectrum overlaps seriously, which limits the application of ultraviolet spectrophotometers in monitoring the dyeing process to a greater extent

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