Improve the dyeing quality of overflow dyeing machines

The overflow dyeing machine is not sensitive to the wrinkle of the semi-finished product, and the dyed 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. Stylish and cotton-like effect. There are many factors that affect the quality of overflow dyeing, and the more difficult quality problem is the level dyeing of the fabric surface. 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 and width of the fabric. For the same width of fabric, the thinner it is, the smaller the capacity. This is because if the light and thin fabrics are fed according to the nominal capacity, the length of the fabric will be too long, and the cycle period during dyeing will be long, which will easily cause the fabric to be knotted due to disorder in the dyeing room, resulting in fabric mottled. The fabric in the dyeing chamber is drawn into the nozzle by the winch. The nozzle is an annular outlet, and the dye liquor is sprayed from the gap of the nozzle. With the pressure of the nozzle, the dye liquor is sprayed on the rope-like fabric, changing the position of the fabric folded due to accumulation in the dyeing chamber. The speed of the fabric depends on the speed of the winch and nozzle pressure. In the temperature area where the fabric absorbs the dye, increasing the number of cycles of the fabric, that is, increasing the running speed of the fabric, is beneficial to the leveling of the fabric. When the liquid volume is constant, by increasing the flow rate of the dye liquor (that is, increasing the nozzle pressure), the cycle times of the dye liquor can be increased, the temperature in the dyeing machine and the uniformity of the dyestuff distribution can be improved, and the contact times between the dyestuff and the fabric can be increased, and the dyeing time can be shortened. shorten. While increasing the fabric speed and increasing the number of dye liquor circulation, attention should be paid to the mutual cooperation between the winch speed and the nozzle pressure, otherwise it will directly affect the product quality. For example, if the speed of the winch is too slow and the nozzle pressure is too high, the cloth speed is greater than the speed of the winch, which is easy to cause fabric scratches; if the speed of the winch is too fast, exceeding the ability of the nozzle to pass through the fabric, the fabric will accumulate at the nozzle, Clogged nozzles will stop the dyeing machine and cause fabric mottled.