What are the problems with the use of HT Jigger Dyeing Machine

In order to prevent the fabric from wrinkling during operation, the jigger is equipped with an arc-shaped tension frame (commonly known as a stretcher). The size of the tension and the arc will directly affect the amount of liquid in the left, middle and right of the fabric. If the arrangement is too large, it will result in a high liquid volume on the side of the fabric and a low liquid volume in the center, which is a simple form of "edge color difference" with medium and light side depths. If the radian is uneven from left to right, it will cause uneven liquid on the left and right sides of the fabric, which constitutes "left and right color difference".

The size of the cloth roll tension and the speed of the line speed are also important factors that affect the amount of liquid in the fabric. This is because there is a drainage problem in the fabric winding (the tension frame drainage and the winding kneading drainage), the tension is large, the drainage is more, and the amount of liquid is small. And the tension is more simple and uneven, which makes the left, center and right color difference and "seam head print" aggravated. During the dyeing process, the line speeds of the head, middle and end of the cloth are different, which will directly affect the length of the fabric immersion in the dye solution. This will undoubtedly have a negative impact on the uniform absorption of the dye and the elimination of the "head and tail color difference". The real problem is Some domestic jiggers only claim "constant velocity and constant tension", and the actual test results are neither constant velocity nor constant tension. During the operation of the cloth roll, the head and tail and the center are larger or smaller, and there is a difference in tension and linear speed. If some line speeds differ by more than 20%, the problem of medium and giant jigs is the most outstanding. Because the line speed is relatively slow after the cloth roll is initiated, it often constitutes tens of meters deep cloth.

Direct (porous) steam pipes and direct (closed) steam pipes are laid at the bottom of the dyeing tank of the jigsaw dyeing machine. Use a direct steam pipe to spray steam to heat the dyeing solution, and use a direct steam pipe for dyeing and heat preservation. The problem is that the direct steam pipe is a porous pipe. Even if the size of the pore size and the density of the distribution are considered in the planning, the amount of steam and water (condensation) during heating still have great unevenness. . The main reasons: First, steam (water) enters from one end of the tube, and the pressure in the tube is uneven, especially when the steam pressure is low; second, the condensed water in the steam will affect the uniform ejection of the steam; third, the steam injection hole Very simply, it is unevenly blocked by the fancy dress and the number of yarns. Obviously, the non-uniformity of the spray volume of the direct heating tube must constitute the temperature difference between the left, middle and the right of the dye solution, and the non-uniformity of the spray water (condensate) must constitute the difference in the concentration of the dye solution between the left, middle and right.