Dye liquor exchange method of high temperature and high pressure overflow dyeing machine
Dec 01, 2022
High temperature and high pressure overflow dyeing machine can be divided into two types according to the flow of water in the dyeing machine: one is an upward machine, and the other is a downward machine. As the name suggests, it is a walk up; a walk down. For ascending machines, the fabric runs smoothly, guaranteed and relatively energy-efficient due to its own weight and the scouring of water. Moving down requires a relatively large water pump, because the force of the water flow pushes the cloth upward, so the power consumption is relatively large. In addition, due to its relatively large water flow pressure, the tension on the cloth surface is relatively large, and the damage to the fabric is relatively large. However, due to its relatively large tension, it is also more suitable for some fabrics with serious curls (mainly some warp knitted fabrics).
The high temperature and high pressure overflow dyeing machine adopts the principle of aerodynamics, mainly using the circulation of air to replace the function of water, so as to ensure the pulling and circulation of the fabric. Therefore, if compared with the traditional dyeing machine, its dye-to-bath ratio has been reduced very effectively, but in the whole airflow dyeing machine, the fabric and dye liquor can be divided into two different exchange forms, air pressure penetration and airflow atomization .
1. Infiltration of air pressure: It is different from the overall form of airflow, but two nozzles are also used, one is a nozzle for pure air flow, and the other is a nozzle for liquid flow. When the fabric is dyed, it also needs to pass through the liquid flow nozzle, and the dye liquid can be exchanged with each other, and then it can directly enter the air flow nozzle from the position of lifting the cloth. Penetration of the dye liquor by the airflow on the fabric. Therefore, when the dyeing machine starts not to stretch the fabric, it also increases the diffusion rate of the dye liquor.
2. Air atomization: The dye liquor also needs to pass through the nozzle. After the atomization treatment, it is dispersed in the air flow, and then all dyed fabrics are exchanged with each other by the air flow of the atomized dye liquid, and the circulation and traction of the fabric are ensured, but during the exchange process, not only the atomized dye liquid is on the contact surface of the whole fabric It is very large, and the fibers contained in the fabric have relatively strong penetrating force on the entire fabric. The high temperature and high pressure overflow dyeing machine can improve the diffusion speed inside the fibers in the dye solution to a certain extent. Judging from the current usage in the market, airflow atomization is more commonly used in the form of dyeing, and the use effect is also very good.