Range in Textile Manufacturing: An Overview

What is meant by the stretch? ?

The draw frame is a spinning machine that converts several carded or combined slivers into slivers of a certain quality.

The role of the draw frame in textiles

The role of the draw frame in textiles is improve the internal structure of the sliver and thus improve its homogeneity over the entire cross-section. At the same time, weight non-uniformities are reduced, the fibers in the sliver are straightened and parallelized, hooks are reduced, the count criteria are met and different types or qualities are ensuredof the raw material. The materials are mixed evenly to achieve the desired mixing ratio.

The Structure of the Line

The line usually consists of a feeding part, an extending part, a splitter part and some automatic devices. The following is the stretcher machine diagram.

Feeding section

The entire feeding section consists of a feed hopper, a sliver These include a guide roller, a sliver guide platform (or elevated frame) and a cotton feed roller, among others. The sliver is guided out of the feed can by the sliver guide roller and the sliver press roller, and guided on a certain path to the feed can sliver guide platform. The guide roller is located near the feed can on the high speedspeed stretch, and the sliver is pushed onto the platform and then guided by the feed roller to the stretching mechanism. A positive feed prevents unintentional stretching and avoids turbulence inside the outgoing sliver.

Sliver rack: This item is usually located on the drive takes place in the infeed area of ​​the machine and is used to insert the sliver treated sliver or man-made fiber sliver while at the same time ensuring an even supply of material.

Drive section:This section usually consists of one or more sets consisting of gears and chain mechanisms that drive the sliver to be processed transport to the infeed belt and rollers.

Infeed belt:This component consists mainly of two moving belts to which the sliver can be drawn from the creel to the infeed roller while maintaining a constant tension and speedneed to be processed. To ensure that the sliver enters the machine evenly.

Intake rollers:This segment is composed of numerous rollers that pull the sliver from the infeed belt into the interior of the machine and at the same time its length and control quantity.

Electronic control system: This is an important part that regulates the feeding, the working condition and the process of the part, and monitors the working status of the equipment and control parameters such as setting.

Drawing part

It consists of a drawing mechanism and an automatic cleaning device.

There are different types of drawing mechanisms, mostly controlled by the combination of drawing rollers and other control components. There are three combinations of top and bottom drafting rollers, namely one up and down (a top roller and a bottom roller), one up and two down (one largeupper roller and two lower rollers). rollers) and two on top and one on bottom (two top rollers and one bottom roller).

Linear drafting is when each pair of rollers has one on top and one on bottom and the yarn is held in the same plane. Curve Drafting is when part of them belongs to a combination of one up and two down or two up and down, e.g. B. three up and four down and so on.

The job of the cleaning device is to remove the flies and dust adhere to the surface of the top roller and the roller in time, thus preventing hemorrhoids and fading into the sliver , to generate yarn defects, which is crucial especially in high-speed lines.

Strip part

Including bundling mechanism, bell mouth, nip roller, coiler, sliver can base, etc.

A clustering device, a clustering roller and an arc duct form the cluster mechanism. The bundler is ea novel metal collector positioned in front of the front stretching roller and has a large entrance and a small exit. The task is to gather the cotton web into a tape in time, minimize lateral fiber loss and fiber entanglement when the cotton web is produced at high speed, promote fiber cohesion, and eliminate the phenomenon of winding rolls and broken strips. The Bundle The role of the roller is to compress the cotton sliver and stabilize the straightness of the fiber. The arc-shaped channel is a semi-closed or closed copper channel that smoothly guides the cotton tape into the bell mouth to prevent the cotton tape from breaking or the bell blocking mouth.

The bell mou, through the compression roller, the cotton tape becomes one tight and smooth sliver of fiber, reducing inadvertent stretching upon withdrawaland the capacity of the sliver container is increased. The compressed sliver enters the inclined tube gear of the reel and is wound into the sliver bin in a cycloid shape. To adapt to the processing of chemical fiber raw materials, the sliver section uses the winding disk of the inclined tube with spiral space curve, which can avoid the inclined tube from clogging.

In addition, the high- The fast line must be equipped with high-sensitivity self-stop devices be equipped, such as such as winding rolls and broken ends in front of the machine, automatic stops for broken ends and missing strips, and safety self-stop devices behind the machine. me\'s braking device can avoid quality problems such as yarn failure and machine component loss caused by the inertia of high-speed parts after shutdown.

What is the process of the stretch?

The worktThe flow of a draw frame generally includes the preparation of the sliver, its entry into the machine and the collection of the processed sliver.

Preparation of the sliver

Before entering the draw frame, it is necessary to place several cotton lay Lay ribbons or man-made ribbons flat on the ribbon laying table and make sure their length and thickness are the same to achieve more even mixing in the machine. Likewise, the strip must be treated to keep its surface clean and free of contaminants.

The process of entering the machine.

Once all the strips are ready, they are fed to the draw frame\'s infeed system. Here the slivers are fed into a series of feeders to ensure that they are fed one at a time. The sliver fed into the machine is of consistent count and length. The sliver then enters the front roller unit, where overa series of take-off rollers effectively mixes the thickness of the sliver, removing inhomogeneous parts.

Merging of strips

After the front roller treatment, the sliver passes to the rear roller unit, where it is processed into strips of continuous fibers. Because the speed of the latter two sets of rollers is slower than that of the first two sets of rollers, the density of the sliver can be adjusted, and the tension between the integrated roller and the speed difference roller smoothes the fibers in the sliver while removing fluff balls and other irregularities. Clean substance.

Collect silver

Once Passing through the back roller equipment, the sliver has been merged and has higher softness, water absorption and air permeability. At this point the sliver flows from the top of the machine over the conveyor and is wound into a circle on the basis. Before tapes leave the mesh machine, they are checked to ensure they are of the expected quality.

In summary, the workflow of a course is complex and requires multiple steps to complete. Through the coordinated operation of key equipment such as bulk feeders, front roll equipment, and back roll equipment, multiple slivers can be brought together quickly and efficiently, providing more uniform, tougher, and more elastic raw materials for the subsequent spinning process.

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