Improve the dyeing quality of overflow dyeing machine

The overflow dyeing machine is not sensitive to the wrinkles of the semi-finished products. After dyeing, the fabric has a uniform color, fullness and good hand feeling. Especially after the chemical fiber and blended fabrics are processed by the overflow dyeing machine, the fabric feels soft, elastic and has good wool. Shape and cotton-like effect.

There are many factors that affect the quality of overflow dyeing, and the more troublesome quality problem is the level of dyeing on the surface of the fabric. Due to the influence of the cloth capacity of the overflow dyeing machine, the overflow dyeing machine has a larger nominal capacity, and this nominal capacity is not suitable for any fabric. Therefore, in production, the actual capacity of the overflow dyeing machine needs to be determined according to the thickness, width, and other conditions of the fabric. For fabrics of the same width, the thinner and lighter the fabric, the smaller the capacity. this

This is because if the light fabric is fed according to the nominal capacity, it will inevitably cause the fabric length to be too long, and the cycle period during dyeing is long. It is easy to make the fabric knotted in the dyeing room due to disorder, resulting in fabric mottling. The fabric in the dyeing room is drawn into the nozzle by a winch. The nozzle is a ring-shaped outlet, and the dye liquid is sprayed from the gap of the nozzle. With the pressure of the nozzle, the dye liquid is sprayed on the rope-like fabric, and the speed of the fabric is determined by the speed of the winch. And nozzle pressure.

In the temperature region where the fabric absorbs the dye, increasing the number of cycles of the fabric, that is, increasing the running speed of the fabric, is conducive to the leveling of the fabric. When the liquid volume is constant, by increasing the flow rate of the dyeing liquid (that is, increasing the nozzle pressure), the number of cycles of the dyeing liquid can be increased, the temperature in the dyeing machine, the uniformity of the dye distribution, and the number of contact between the dye and the fabric are increased, and the dyeing time is increased. shorten. While increasing the fabric speed and increasing the number of dye liquor circulation, attention should be paid to the mutual coordination between the winch speed and the nozzle pressure, otherwise it will directly affect the product quality.

For example, if the winch speed is too slow and the nozzle pressure is too high, the cloth speed is greater than the winch speed, which will easily cause fabric scratches; if the winch speed is too fast, the fabric will accumulate at the nozzle if it exceeds the nozzle’s ability to pass through the fabric. Blocking the nozzles causes the dyeing machine to stop running, causing fabric spots.