Matters needing attention in carding process

Due to the poor hygroscopicity of polyester fiber and the large coefficient of friction, static electricity can be generated during the carding process, which often leads to difficulties in students' carding work and study. The structure of the double twisting unit of the double twisting machine mainly includes the spindle braking device, the spindle part of the double twisting machine, the yarn winding device, and the special device of the double twisting unit. Grinder A spinning machine that turns fiber strands into rovings.

The main function is to draft and twist, and to wind the roving into a certain package to meet the processing requirements of the spinning frame. During the spinning process of the spinning frame, the semi-finished roving or sliver is drafted, twisted, and wound into a spinning machine. The combed sliver and the needle-carding machine combine the sliver, the needle row is drafted to improve the sliver structure, and the roving is further spun into spun yarn on the ring spinning frame, which is the main spinning machine. 1. Xinjinlong wrapping is a phenomenon in which the fibers perforate between the needle teeth, which weakens the combing ability of the needle teeth.

The phenomenon of flower entanglement is mostly local, that is, white stripes are formed on the needle surface of Xinjinlong, and there are many neps on the cotton net. There are many factors affecting the flowers around Xilin, mainly in the following aspects. (1) Raw material factors If the surface of polyester fiber contains excessive oiling agent or poor performance, such as excessive viscosity, poor antistatic performance, and high fiber moisture regain, the friction between the fiber and the surface of the stitch will increase, resulting in the surface of Jilin stitch.

(2) Process configuration 1. The linear speed ratio between the cylinder and the licker-in is too small, and the fiber-holding licker-in cannot be smoothly transferred to the surface of the needle cylinder, thus causing the needling roll to grind, thereby increasing the amount of carding between the licker-in and the licker-in. The cartridge causes the load to press against the fibrous filling in the interdental space. 2. The speed of Xinjinlong is obviously low, the centrifugal force of fiber passing through is small, and the effect of transfer learning is poor. 3. The cylinder and flattening progress is too small, during the combing process, the fibers are pressed against the teeth with greater force.

(3) Mechanical state 1. The selection of Xinjinlong and Doffer card clothing is not good. 2. Due to negligence in work or poor surface flatness of the needle teeth, the distance between the author and the Taoist priest is too large or partial, and the transmission effect is poor. 3. Needle burrs or crush injuries.

This condition is common and must be corrected as soon as possible. 4. The channel is clean. To ensure fiber passage, the cylinders are replicated clear at least once a day, and periodically (eg, combined with a wiping cycle for vehicles) brushed with a brush roller grease.

(4) Workshop temperature and humidity The temperature and temperature environment conditions of the carding workshop must be able to ensure that the polyester fiber cell surface oil can exert its best antistatic and lubricating effects. Generally, enterprises require different temperatures to be lower, and relatively higher humidity to be higher, with a temperature of 20-28°C and a relative humidity of 55-60%. Low temperature can reduce the viscosity of the oil and improve the smoothness of the fiber, while high humidity can effectively reduce the generation of static electricity.

Second, the cotton net floats and discharges the cotton net 1. The quantitative wool is too light. Especially in the case of the stripping tower roll device, the roll paper should be appropriately increased. 2. The tension of the cotton web is too small for drafting.

Improper temperature and humidity control. Under the condition of low temperature and low humidity, the cotton mesh is easy to float, but the over-wet cotton mesh leaks. 4. The performance of fiber oil is poor, and the static electricity interference is serious.

Third, the oblique jurisdiction of the coiled sliver 1. The quantitative sliver is too large, which is not compatible with the diameter of the spiral pipe. 2. The pressure time of the large pressure roller is insufficient, and the compression of the sliver is poor. 3. The characteristics of fiber curling are bad, the cohesion between fibers is poor, and the lobes are fluffy.

4. Poor performance of fiber oil, poor antistatic technical effect or low oil content of fiber products, poor cohesion between fibers. Improper temperature and humidity control, electrostatic interference, and loose strip structure. The inclined pipe is oily and the channel is not smooth.

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