4 ways to improve the quality of overflow dyeing machine
Mar 01, 2023
1. The effect of cloth capacity
The overflow dyeing machine has a larger nominal capacity and is not suitable for any fabric. Therefore, during production, the actual production capacity of the dyeing machine should be determined according to the thickness and width of the fabric. For the same width of fabric, the thinner and lighter the fabric, the smaller the capacity. This is because supplying thin and light fabrics according to their nominal capacity inevitably increases the length of the fabric, increasing the cycle time during the dyeing process and making the fabric more prone to knotting in the dyeing room. Creates messy and mottled fabrics.
2. The influence of winch speed and nozzle pressure
The fabric in the dyeing room is winched into the nozzles. The nozzle is an annular outlet, and the dye solution is sprayed through the slit of the nozzle. The pressure of the nozzle sprays the dye solution onto the rope cloth, and the speed of the cloth is determined by the following formula. Winch speed and nozzle pressure. In the temperature range where the fabric absorbs the dye, increase the number of cycles of the fabric, that is, increase the running speed of the fabric and promote the level dyeing of the fabric. In the case of a certain amount of liquid, increasing the flow rate of the dyeing liquid (that is, increasing the nozzle pressure) can increase the cycle times of the dyeing liquid, the temperature in the dyeing machine and the uniformity of the dye distribution. The number of contact between the dye and the fabric increases and the dyeing time shortens .
3. The influence of bath ratio
The bath ratio not only affects the color of the fabric, but also affects the normal operation of the fabric in the dyeing machine. If the liquid ratio is too small, it is difficult for the fabric to move, and the winch cannot smoothly lift the fabric from the dyeing room, and the fabric moves slowly. If the bathing speed is too high, the fabric will float on the water, causing turbulence and knotting, and the fabric will be stained.
4. The influence of dyeing process
(1) The main factors affecting the quality of the overflow dyeing machine are the use and addition method of dye, dyeing temperature, the type, dosage and addition method of salt and alkali agent, dyeing time, dye bath rate, etc. Among the above factors, except for the addition methods of dyes, salts and alkalis and the bath ratio, other factors only affect the color depth of the fabric.
(2) For disperse dyes. When disperse dyes are dyed at 90°C, the heating rate can be higher. Above 90°C, especially around 130°C, to avoid uneven dyeing, the dyeing temperature should be controlled slowly. Dyeing with disperse dyes is greatly affected by temperature, so within the temperature range where the dye is absorbed, increasing the number of cycles between the fabric and the dye liquor can make the dye and temperature distribution in the dyeing chamber even.
