Leather dyeing machine

Abstract

The invention provides a leather dyeing machine, and belongs to the technical field of leather dyeing equipment and the leather dyeing machine can be used for solving the technical problem in the prior art that the leather dyeing machine has low dyeing efficiency. The leather dyeing machine comprises a base, wherein the base is provided with a drum body, the drum body is internally provided with an inner cavity, a rotary shaft I and a rotary shaft II are respectively fixed at two ends of the drum body, a drive device is arranged between the base and the outer end of the rotary shaft I, the rotary shaft II is pivoted on the base, a rotary joint II is arranged outside the rotary shaft II, a power-driven three-way valve is connected outside the rotary joint II, the power-driven three-way valve comprises an outlet I, an outlet II and an inlet, the inlet is communicated with the outer side of the rotary joint II, a vacuum pump is also fixed on the base, and the vacuum pump is communicated with the outlet I through a gas guide tube. Through vacuum pretreatment on the leather in the inner cavity of the drum body, the dyeing efficiency of the leather dyeing machine is improved.

Description

technical field [0001] The invention belongs to the technical field of leather dyeing equipment, and relates to a leather dyeing machine. Background technique [0002] Leather dyeing is a complex physical and chemical process, which is the process of penetration and bonding of dye molecules to leather fibers, and is the total effect of physical and chemical effects. During the whole dyeing process, adsorption, diffusion, penetration and fixation interact and alternate with each other. The leather dyeing process involves a wide range of factors, and there are many influencing factors, which can be mainly divided into factors such as equipment, dyeing materials, technology and operation. Although with the continuous development of production and the continuous improvement of scientific and technological level, dyeing machinery is also becoming more and more advanced, but the quality problems caused by equipment cannot be completely avoided. [0003] Chinese patent CN 2017223...

AI Technical Summary

Problems solved by technology

However, in the leather dyeing machine in the prior art, after running for a period of time during the dyeing process, the pH value in the dyeing solution will change accordingly, and the leather cannot be kept in a relatively stable pH environment, which will affect the dyeing efficiency of the leather.

In addition, because the dyes in the dyeing liquor penetrate through the concentration gradient difference between the dyeing liquor and the leather, in the prior art, the dyeing efficiency can only be improved by increasing the concentration of the dyeing liquor. However, this The method is less economical, will cause more waste, and the production cost is higher, therefore, it is not suitable for popularization and use

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