Analysis Of Bamboo Fiber Vortex Spinning Process Two

Three

Combining bamboo fiber properties and

3.1 card clothing specification

The specification parameters of card clothing must meet the requirements of enhanced carding and pfer, so that carding and pfer can get the best configuration and optimal carding quality during carding process.

Considering the fine fineness, long length and less impurity of bamboo fiber, there are many static electricity in the carding process and easy to wrap the card clothing. Therefore, the card clothing should be used to fill the card clothing of the carding machine with less fiber load, higher fiber pfer rate, fewer sliver nodes, higher clarity of the cotton web, better fiber carding and less fiber damage.

Needle roller clothing: high quality steel saw blades, sharp teeth, sharpness, abrasion resistance, smoothness and smoothness, avoid abrasion and reverse teeth damage, appropriately increase the number of teeth per unit area and narrow base thickness, so as to improve carding and reduce the burden of carding in cylinder and cover area.

Cylinder linen: the use of short teeth, shallow teeth, in the carding process to make fiber at the tip of the tooth, increase the contact length and the number of teeth of the cylinder linen and another needle surface, is conducive to the fiber carding and pfer, improve the carding effect and even mixing effect.

The clothing load is light and the pfer rate is high, which is beneficial to reduce neps.

The use of thin teeth and dense teeth increases the ability of holding and combing the fibers. The thinning of the base thickness increases the lateral density of the clothing, increases the ratio of the pverse and longitudinal teeth, and facilitates the bundling of the fiber bundles into single fibers, which is conducive to the reduction of neps, the improvement of the evenness of the cotton web, the structure of the cotton net and the straightening of the fiber dimension, the improvement of the yarn quality and the reduction of the wear of the tooth tips.

In order to enhance the pfer and release properties of bamboo fiber during the carding process and avoid the rapid increase of neps, the working angle can be grasped.

Doffer clothing: the main function of doffer clothing is to coagulated fibers, to pfer the combed single fibers from the cylinder in time, and to form a cotton net. The doffer clothing should have enough grasping power.

Therefore, in order to ensure timely, adequate and normal pfer of fibers and solve the problem of smooth guidance of high-speed airflow, the pfer capability can be improved by using tooth height, large gap capacity, small working angle and arc tooth tip.

The depth of doffer clothing is increased, the capacity between teeth is increased, and the grip of doffer clothing is large. It helps to accommodate more fibers, and is conducive to the guidance and release of air flow in the area of cylinder and doffer.

The arc shaped cusp tip can greatly improve the stripping and pferring performance of doffer clothing. Reducing the cusp angle is beneficial to the puncture of the fiber layer and the agglomeration of the cotton net, and also significantly reduces the neps and improves the quality of the cotton net.

Flat card clothing: cylinder and cover plate are the main carding area of carding machine. The carding effect is completed by the cylinder linen and the flat clothing. The flat clothing is arranged in a circular curve with a small pverse needle tip and a gradual thinning distance between the needle roots, which is conducive to the release and pfer of fibers, the light load of the clothing, the less flower cover, and the guarantee of adequate combing and reducing neps.

3.2 drop roller control

Because

The influence of the most tight spacing between the cotton plate and the needle roller on the breaking strength of the bamboo fiber vortex yarn is studied.

The speed of the needle roller is high, and the puncture roller can open and break the fibers tightly for the fibers which are held by the cotton roller and the cotton plate. Improper treatment can cause fiber damage.

In order to avoid excessive damage to fibers and improve the strength of yarn, the radial feeding plate can be used. The most tight spacing between the cotton plate and the needle roller should be enlarged appropriately.

At the same time, noil control should be strengthened, the location of the dust removal cutter should be increased and the installation angle of the dust removal cutter should be increased, and the suction volume should be increased without disturbing the air flow in the air hood of the puncture roller.

You can also use the mesh free light plate to leak the bottom and reduce the inlet spacing, which prevents a large number of airflow from entering the bottom of the air, resulting in too high air pressure, and reduces the small leakage of the bottom and accumulates the flowers inside.

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3.3 line speed ratio between Xilin and doffer

Because

Xilin and doffer line speed ratio (Vc/Vd) pairs

3.4 control of relative humidity

Relative humidity pair

According to the practice of bamboo fiber spinning, the relative humidity is controlled between 65% and 70%, so that the phenomenon of sticking needle clothing and winding roller can be reduced, and the quality of the sliver can be guaranteed.

Before spinning, a suitable amount of antistatic agent and antiskid agent can be sprayed on the fibers to increase the softness and cohesion of the fibers, so as to achieve the spinning requirements.

4 Conclusion

(1) adoption

(2) select carding cloth to enhance carding, pfer, reduce neps and fiber damage, so as to enhance the carding and pfer ability of needle clothing, so that the best carding quality of bamboo fiber can be obtained during carding process.

(3) increase the speed of the thorn roller, enhance the opening and carding of the thorn roller, and improve the pfer ability of the fiber to the cylinder, so as to reduce the NEP and improve the yarn evenness.

(4) increase the speed ratio between Xilin and doffer to achieve fast pfer, increase fiber elongation of sliver, reduce the yield of fiber hook and improve the quality of bamboo fiber vortex spinning.

(5) the relative humidity of the workshop has obvious influence on the spinning quality of bamboo fiber. The relative humidity is too high or too low will obviously affect the quality of the sliver. Therefore, it is necessary to strengthen the control of relative humidity in the production process.