Draw Frame in Textile Manufacturing: An Overview

 


What is meant by draw frame?

The draw frame is a spinning machine that converts multiple carded or combed fiber strips into fiber strips of a certain grade.

The role of draw frame in textile

​The role of draw frame in textile is to enhance the internal structure of the sliver, enhancing its long-section homogeneity. At the same time, decrease weight unevenness, straighten and parallelize the fibers in the sliver, reduce hooks, fulfill the fineness criteria, and ensure that different types or quality of raw materials mix uniformly to reach the desired mixing ratio.

What is the process of draw frame?

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

Preparation of the sliver

Before entering the drawing frame, it is necessary to place multiple cotton slivers or chemical fiber slivers flat on the sliver laying table, and ensure that their length and thickness are equal, so as to get a more uniform mixing inside the machine. Likewise, the sliver needs to be treated to keep its surface clean and free of impurities.

The process of entering the machine

Once all the slivers are ready, they are fed to the infeed system of the draw frame. Here, the slivers are fed into a set of dosing feeders to ensure that each sliver fed to the machine is a consistent number and length. Next, the sliver enters the front roll unit, where, through a series of take-off rolls, the thickness of the sliver is effectively mixed and inhomogeneous parts are removed in the process.

Merging of strips

After the front roll treatment, the sliver goes to the back roll unit where it is processed into strips of continuous fiber. Here, 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 integral roller and the speed difference roller will flatten the fibers inside the sliver, and at the same time remove fluff balls and other irregularities. clean substance.

Collect silvers

Once passed through the back roller equipment, the sliver has been merged and the sliver has a higher softness, water absorption and air permeability. At this point, the sliver will flow down the conveyor belt from the top of the machine and be wound into a circle on the base. Before the slivers are sent out of the net machine, they are inspected to ensure that they are of the expected quality.
In summary, the work flow of a draw frame is complex and requires several steps to complete. Through the coordinated operation of key equipment such as quantitative feeder, front roller equipment, and rear roller equipment, multiple slivers can be merged quickly and efficiently, providing more uniform, tougher and elastic raw materials for the subsequent spinning process .

This post is reproduced from fyitester.com.

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