Find the basics of drawing frames and roving frames for textile mills

Summary. Hello, dear. It's true that all spinning processes are inseparable from draw frames; The spinning process is as follows; 1.

To spin cotton into yarn, it generally has to go through the main processes such as clearing, carding, drawing, roving, and spinning. Yarns and threads used for high-end products require additional combing processes. 2.

For the production of cotton yarn with different requirements, different processing procedures should also be adopted, if spinning pure cotton yarn and polyester-cotton blended yarn, due to the different raw materials used, the physical properties of various raw materials are different, and the product quality requirements are different, different production processes need to be used in processing.

Hello, dear. It is true that all spinning processes in the rolling hall are inseparable from the drawing frame; The spinning process is as follows; 1.To spin cotton into yarn, it generally has to go through the main processes such as clearing, carding, drawing, roving and spuning.

The use of slag for high-grade yarns and threads also requires the addition of a combing process. 2.For the production of cotton yarn with different requirements, different processing procedures should also be adopted, if spinning pure cotton yarn and polyester-cotton blended yarn, due to the different raw materials used, the physical properties of various raw materials are different, and the product quality requirements are different, different production processes need to be used in processing.

1) Pure cotton yarn process: 1 carded yarn: clear flower, carded cotton head and two and roving spinning post-processing.

2 Combed yarn: clear flower, carded cotton, pre-combined, striped roll, combed head and two-and-three-and-three, roving, spinning post-processing. (2) The process flow of polyester-cotton blended yarn:

1 general carding old envy yarn: raw cotton: clear flowers, carded cotton heads, and two and three and three and roving spinning yarn post-processing.

Polyester: clear flower carded cotton. 2 Combed Yarn:

Raw cotton: clearing, carding, pre-combing, combing, combing, two, three, roving, spinning, post-processing. Polyester:

Clear flowers, carded cotton, pre-merged.

Hello, there are many reasons why the sliver spun by the parallel trace machine breaks on the roving guide frame, and the following are some of the possible reasons:1Excessive spinning tension:

Excessive spinning tension can cause the sliver to break and crack on the strip frame, as excessive tension can make the yarn stiff and difficult to move. 2.Tampon quality issues:

Poor quality slivers, such as short fiber length, low strength, and excessive impurities, can also lead to strip breakage. 3.Structural problems of guide strips:

The unreasonable structure or severe wear of the guide frame may cause the yarn to slide and be blocked on the guide frame, resulting in broken strips. 4.Spinning process problems:

Improper spinning process, such as too fast spinning speed, improper spinning tension, etc., may also lead to broken strips. In order to avoid the breakage of the sliver spun by the draw frame on the roving guide frame, you can improve it by the following measures:1

Control Spinning Tension: Control the spinning tension so that it is within the proper range. 2.

Optimize sliver quality: Select high-quality tampons and carry them to strict quality control. 3.

Check the structure of the guide frame: Regularly inspect the structure of the guide frame and replace the parts with serious wear and tear in time. 4.

Adjust the spinning process: adjust the spinning process according to the actual situation to ensure the quality and efficiency of spinning.

The breakage of the cotton sliver on the roving guide frame may be caused by the following reasons: Poor quality of the sliver: the tensile performance of the sliver is not good enough, or it contains impurities, twisting and other defects, which will cause the sliver to break or break when passing through the roving guide frame.

Failure of roving guide frame: Problems with the roving guide frame itself, such as unobstructed and worn conduits, or inappropriate clamping force between the conduit and the guide wheel, may lead to breakage of roving. Spinning process problems:

Problems such as the equipment adjustment and equipment of the drawing frame, such as too fast sliver feed, improper drafting adjustment, excessive roll pressure or too small call, etc., may lead to the breakage of the spun roving. External factors: working environment problems, such as unstable electricity, high temperature and other factors, may lead to abnormal operation of the machine, which in turn affects the quality of roving.

In view of the above possible reasons, it is recommended to carry out comprehensive management of the working environment while checking the drawing frame equipment, overhauling the roving guide frame, and reasonably adjusting the spinning process. This helps to reduce roving breakage problems caused by external factors. At the same time, in the spinning process, it is also necessary to pay attention to monitoring the operation status of machinery and equipment, find and eliminate abnormal situations in time, and ensure that the quality of roving spun from cotton slivers meets the requirements.

Summary. The reason for the broken end at this position of the guide frame is very clear, it is that the strip itself is broken, or the strip is blown away by the wind.

The reason for the broken end at this position of the guide frame is very clear, it is that the strip itself is broken, or the strip is blown away by the wind.

If the sliver supplied to the sliver of the roving is intermittently not connected, everyone will talk about the fact that the ant is engaged in the first servant. For the drawing stopper, the joint is a very simple action, but if the end is not connected, to the roving, it is the stop processing of the main machine. The stealer of the drawing block worker and the illegal sampling of the test worker will cause this problem.

Hello! Dear, thank you for your patience, (1) Roving clamp hard core defects. Observe the fiber arrangement state at the broken end of the roving, and find that there are hard core defects in the whiskers, which are mainly composed of short linter and dark in color, and infer that the problem lies in the combing process.

2) Roving "cotton mice" decapitated. Observing the state of the fiber arrangement at the broken end of the trillion potato roving, it was found that the whisker became "cotton mouse" After observation and analysis, the problem was that when the end of the roving frame was broken, the operation of the gear change joint of the car stopper was not standardized, and the "cotton mouse" appeared on the roving by hand rubbing the head and wrapping. I hope mine can help you, I wish you a happy life, thanks for the consultation.

Hello! See if the following ideas can help you! Thank.

1. The key words in the question are "roving" and "drawing", both of which involve the process of spinning and textile raw materials, to understand the spinning process and the classification of spinning and the raw materials used in spinning, this aspect can be checked in the textile process network.

2. Roving and drawing, the former can be popularly understood as the thickness of the yarn; After that, it can be popularly understood as the drawing process of A1+A2 yarn.

3. The focus of the problem is on the spinning process and the operation of the drawing, but the procedure is basically the same, and the other is according to the operation of the equipment.

I have, I don't know how to contact you.

Cotton drawing frames are available in single-eye, two-eye, four-eye, etc. Feeding a plurality of slivers, after merging and drafting, it is called a single-eye drawing frame; The output of two slivers is called a two-eye drawing frame, and so on. Each draw frame has a drive system with its own chamber.

The drawing frame is composed of a feeding part, a drafting part, a strip part and some automatic devices.

The function of the draw frame is to improve the internal structure of the sliver, so as to improve the uniformity of its long fragments, and at the same time reduce the weight unevenness, so that the fibers in the sliver are straight and parallel, reduce the hooks, and make the fineness meet the requirements, so that the different types of bush shirts or different quality of raw materials are mixed evenly to achieve the specified mixing ratio. According to the form of drafting mechanism, draw frames are divided into two categories: roller drawing frames and needle comb machines.

The yarn coarse section is the segment where the yarn diameter is thicker than the normal yarn (generally refers to more than 2 times the specified diameter).The details are thinner than the normal yarn segments.

The drawing frame is one of the silver spinning machines, and its function is to reduce the weight unevenness and improve the fiber straightness by combing the cotton raw strips through merging, drafting, winding and molding. It is easy to use in subsequent processes (roving frames or jet spinning machines or friction spinning machines). Ruler clear.

The coarse sections and details of the yarn refer to the thicker or finer parts that appear different from the yarn in the previous fragment of Changlingzhou. and long and thick, short and thick; It is divided into long and thin and short and thin. These need to be learned slowly by doing.

Hope that helps.