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Carding action of licker-in

Author:Xinjinlong Machinery-Fabric Recycling Machine Manufacturer

The main function of the carding roller is to card impurities. Carding machines are used to process cotton fibers and chemical fibers and belong to textile machinery. According to the spinning process, carding is an important process.

The front process of the carding machine is the opening and cleaning machine, and the latter process is the drawing frame (carding process) or the sliver coiler (combing process). 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. Special equipment for the textile industry on the winder.

As the last process of spinning and the first process of weaving, winding is the link between the past and the next.“bridge”Therefore, it occupies an important position in the textile field. Impurity defects and comb fibers can be effectively eliminated only by fully combing the cotton layer. The carding of the fiber layer clamped by the licker-in not only directly affects the carding quality between the licker-in and the cover, but also affects the carding quality of the licker-in, the uniformity of the licker-in, the whiteness of the back and the degree of fiber damage. .

Affecting roll carding In addition to the batt structure influencing factors, quality is good or bad, there are gauge blades, saw tooth force, speed of roll carding, feed plate, feed plate geometry and relative licker-in position. 1. During the carding process of the licker-in, when the licker-in is carding the cotton layer, cotton whiskers that gradually become thinner from top to bottom are formed at the feeding board, as shown in Figure 2-3, when the feeding roller 2 and the feeding Plate 3 is fed into the cotton layer, the tail end of the cotton bundle is under the control of the frictional force formed by the pressure of the feeding roller company and the joint development of the adjacent cotton bundles, while the head end enters the action arc of the licker-in roller 1, that is, it is subjected to a frictional force. The high speed of the serrations strikes and combs, and the cotton bundles are punctured and divided. Due to the constant speed feeding of the cotton layer, the holding force of the cotton bundle can be gradually weakened, and the fibers in the cotton bundle that have been combed out are gradually serrated or taken away by the serrations due to their friction with the serrations. The presence of the tail end of the fiber then slides under the control of the cotton bundle in the absence of frictional forces and adjacent countries, subject to social separation and straightening.

Because there is nearly a thousand times or even about a draft between the licker-in and the feed roller, 70%-80% of the cotton bundles in the cotton layer are decomposed by the licker-in and processed into a single-cell fibrous tissue state. 2. Saw blade specifications The material and specifications of the saw blade and the development status of related technologies have a great impact on the carding function of the licker-in. In order to improve the ability of the sawtooth to pierce the cotton layer, most recent researches use thin teeth.

In order to increase the output of the carding machine without increasing the rotation speed of the piercing too much, there is a trend of increasing the tooth density. 3. The force of the sawtooth The force of the sawtooth on the cotton bundle is composed of the frictional resistance between the two sides of the sawtooth structure and the cotton bundle and the frictional development resistance between the front working surface of the sawtooth and the cotton bundle combed by it. On the one hand, the cotton bundles between two adjacent serrations are compressed; on the other hand, the elasticity of the fibers produces a certain pressure on both sides of the serrations.

This pressure causes friction between the fibers and the serrations as the serrations pass through the tuft. It can change the position of the tuft, parallel to the zigzag plane of rotation, and possibly drive the fibers. 4. The carding degree and speed of the licker-in are generally expressed by the average number of teeth per fiber.

The licker-in value of high-yield cards is generally between 0.5-1 tooth II fiber. It is an average value and does not take into account the effects of layer structure, openness and lateral uniformity, nor does it reflect factors such as the grip of the incoming layer and the distance between the licker-in and the feeder plate. Therefore, the licker-in degree value is only used as a reference index to measure the licker-in quality.

When the main output of the carding machine continues to increase, in order to maintain a certain licker-in degree value, students can use the method of increasing the licker-in speed (the tooth density remains unchanged) or increasing the tooth density (the licker-in speed develops the same).


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