Polyester yarn

100% polyester 42s/2 22s/2 polyester spun yarn

There are many matters needing attention in the spinning process of polyester yarn, and the cotton cleaning process is in the first process.

How to control air flow in opening and cleaning process to improve product quality and production environment?

In the process of cotton spinning, the operation of equipment, the suction of fan, the control of dust removal unit and many other process air flows in the production workshop, which has a certain impact on the air conditioning of the workshop, and changes the local temperature and humidity to varying degrees, affecting the product quality and air conditioning. Strengthening the control and utilization of process air flow will play a positive role in adjusting the air quality of workshop, improving product quality, reducing labor intensity and improving production environment. Now the utilization and control of air flow in opening and cleaning process are shared with you.

Control of process air flow of cotton Grabber

The process air flow will be generated by the rotation of the gripper and the suction of the front spinning condenser, which will mix with each other. Their function is to grab the cotton block, but it also affects the effect of grasping. When the wind force is weak, it is easy to cause back flowers and form bunches and neps when the wind is weak. If it is too high, the energy consumption will be increased. According to the hardness of cotton block and the type of material, appropriate wind speed can achieve the purpose of both energy consumption and quality stability.

Control of process air flow in cotton conveying pipeline

The process air flow of cotton conveying pipeline belongs to positive and negative pressure operation process air flow, which has certain directionality, mainly conveying cotton block or dust. The wind speed determines the weight and volume of the pipeline and the effect of transportation; the pipe diameter determines the flow rate. If the flow rate is low, the cotton block is easy to stay in the pipe, which will affect the mixing. Therefore, the wind speed should be set reasonably according to the bearing volume and air volume, and the stable air flow transportation is the main way. The process air flow in the conveying pipeline has a constant speed. By using the relatively closed characteristics, the heavy object dropper can be added to make the impurities or heavy objects fall, which provides a good guarantee for the quality and safety.

Control of process air flow in cotton condenser

The process air flow of the condenser belongs to the power suction positive negative pressure process air flow, and its main function is to pump the cotton flow and eliminate short fibers. The strength of air flow determines the speed of fiber bundle transportation, and when rubbing with fiber, neps are easily produced due to long residence time. According to the conveying distance and fiber volume, the wind speed should be matched with the pipe diameter to stabilize the cotton air ratio and ensure the fiber transportation. In the positive pressure operation, as the power of pressing into the dust removal unit, the fine dust is separated in the first stage, and the purified air is removed in the second stage, which can save energy consumption and reduce power consumption.

Control of process air flow of cotton mixer

The process air flow of the mixing and opening machine belongs to the negative pressure operation air flow, which is produced by the suction of the fan of the front spinning equipment, and its main function is to transport the cotton block. The strength of air flow has a great influence on the conveying of cotton block, and it is easy to cause choking if it is too small. Because the air flow of the mixed opening cotton machine is mostly vertical pipe, and the bending angle is mostly right angle, which affects the wind speed and air volume. Therefore, in the design, it is necessary to make the bending radian of the elbow be twice of the pipe diameter, and try to avoid right angle turning to reduce the running resistance and energy consumption. It is the best time to separate the dust and impurities. The U-shaped impurity dropping device is installed at the outlet of the machine to separate the impurities from the fiber.

Air flow control of multi bin cotton mixer

The process air flow of multi bin cotton mixer belongs to power suction flow, which is used to transport cotton flow and blended fiber. The air flow is required to be stable, and the range of pressure is positively related to the density of cotton layer. Unstable air flow easily affects the density of cotton layer and the mixing of fibers. The air flow is required to be constant in a certain range to make the motion speed uniform and ensure the fiber mixing effect. The process gas flow is divided into output and input flow. At the input, the process air flow is positive pressure, and the fiber jet is dispersed; when the output process air flow is the process air flow in front of the cotton condenser, and the free dropping points can be added with the help of the movement characteristics of the air flow.

Control of process air flow in coiler

Mechanical suction rotary air flow is the characteristic of the process air flow of the coiler, which belongs to negative pressure air flow, mainly condensing cotton layer and conveying fiber. The process air flow will be produced by the integrated beater rotation, and the boundary layer air flow with faster rotation speed has a greater impact on the falling impurity. The influence of the technological air flow of the condensing fan on the quality and effect of the condensing cotton is obvious.

Due to the influence of the beater's rotation speed on the air flow in the comprehensive beating process, the speed should be reasonably selected according to the fiber strength. The process air flow of the coiler should be stable and smooth, especially the turning point of the air flow discharged from the blower of the winder should be able to reduce the pipe resistance and ensure the smooth air flow. According to the principle of falling impurity in the boundary layer, the air flow of the beater can be divided into dead box and live box, which can separate the collecting fiber from the falling impurity and reduce the dust absorption into the cotton layer.

The main purpose of the living box is to collect impurities and the dead box to recover fibers, so as to reduce the dust adsorption to the cotton layer and affect the impurity removal effect. The air flow in the bottom row condenser is the key of the condenser, and its distribution state depends on the movement state of the air flow. The transverse width and longitudinal length of the cotton lap affect its weight cv. According to the motion law of the air flow and the processing performance of the fiber, it can be adjusted to make the dust cage condense the cotton and reduce the phenomenon of the lap stratification. The transverse closure from both ends of the dust cage can reduce the lap width and reduce the weight CV of the cotton coil.