The Key To The Rapid Development Of Domestic Spinning Is The Need For Continuous Innovation.

How to effectively improve production efficiency of Chinese textile has always been

The focus of attention of enterprises.

Lida textile machinery specially set up "spinning high speed" column.

In this column, we will discuss with you the colleagues in the textile industry about the feasibility of increasing productivity through spinning machines, and share the customers' examples of increasing the speed of the compact spinning machines.

New concept of improving production efficiency -- speed increase of spinning

In recent years, with cotton spinning at home and abroad

Competition is becoming more and more intense. Cotton mills must be able to pursue higher economic benefits and reduce production costs.

The most direct way to achieve high efficiency is to increase production.

For spinning mills, achieving high-speed production of spinning frames is one of the effective ways to increase production capacity.

The high speed production of spinning frame is not only to improve spindle speed, but to improve vehicle speed and achieve stable production under the premise of ensuring quality and broken ends, so as to increase production.

Spindle speed difference between Chinese and Indian spinning frames

What is the speed of a Chinese spinning machine at present?

Take the K series compact spinning frame (also known as the "Camo spinning machine") as an example, according to incomplete statistics, the average speed of China's K compact spinning machines is about 30% lower than that of India users.

In India market, the spindle speed of Lida K series compact spinning machine can reach 22000 revolutions per minute, and many customers have spindle speed of 25000 rpm.

What is the reason for the difference in spindle speed between Chinese and Indian spinning machines? What are the reasons for this? Are the equipment limitations, raw material differences, factory management level, or other reasons?

Achieving high-speed production of spinning frames is one of the effective ways to increase production capacity, but we also find that the average speed of spinning machines of Chinese users is much lower than that of India users.

Does spinning equipment limit the high-speed production of spinning machines?

Indeed, many spinning enterprises in China are concerned about the high speed spinning of spinning frames, on the one hand, because of the factors themselves.

This includes the design and manufacturing process of the spinning frame itself, as well as the

It also has a certain impact on the operation of equipment.

First, the frame structure and stability of the spinning frame will affect the high-speed operation of the spinning frame.

For example, many spinning frames in the market use 36 spindles as a section of dragons, with a span of 1260mm, with less support points under the same spindle number, resulting in poor stability at high speed.

Secondly, when the spinning machine is running at high speed, if the main motor and spindle roll of the equipment are of poor machining accuracy and quality, the vibration of the machine will increase, resulting in adverse effects on spinning stability.

In addition, the key spinning special parts that participate in spinning and winding will also affect the high speed of the spinning frame.

When the spindle is rotating at high speed, it will cause abnormal, vibration and wear problems due to the influence of tube weight, air ring tension, air resistance and spindle belt friction resistance.

The friction between the traveller and the steel collar will generate tremendous heat. When the traveller rotates beyond a certain linear speed, the traveller will burn up due to the rapid heating up, resulting in the phenomenon of flying circles.

The selection of travellers is also closely related to yarn breakage and quality.

The steel collar is complementary to the traveller, which has a direct effect on the service life and effect of the traveller.

Therefore, the high quality spinning accessories are the most important factors to ensure the stability of the spinning frame after high speed operation.

As mentioned above, if spinning enterprises adopt stable frame structure, high precision spinning machine, and high quality spinning accessories, spinning machine itself can run at high speed.

Take the K 42 of Lida compact spinning machine as an example, the drafting system adopts mechanical gears to ensure the excellent stability of the equipment when running. This is the basis for high-speed production of spinning machines. For example, according to Lida's recommended spindle speedometer, when spinning 60 pure cotton woven yarns, 38 millimeter steel rings (usually 36 mm steel collar are used by foreign customers), the maximum spindle speed recommended by Lida is 20000 revolutions / points, and 80 woven yarns are up to 19000 rpm.

After spinning at high speed, the spinning tension changes greatly, and the stability of spinning process is reduced.

K 42 the distinctive geometric angle of spinning ensures small and stable spinning tension. It reduces yarn breakage, improves spinning stability and machine efficiency. At the same time, this is also the reason why the spindle speed can be increased more quickly to the highest spindle speed after the doffing. The longer the machine runs at the highest speed, the higher the output of the single spindle in a doffing cycle.

In addition, the structure design of the suction drum is very scientific and reasonable. The surface of the suction drum is treated by special coating, not only wear-resisting, but also further improves the stability of the spinning; the air guiding control element is covered on the suction drum to realize the direction of the directional air flow, so that all the fibers in the gathering area are controlled, so as to achieve full effective aggregation.

K 42 superscript with special parts, such as the Blake bar, which ensures the K 42 bar at high speed, single yarn strength and evenness.

And yarn defects can still maintain a good level.

Therefore, the K 42 of Lida compact spinning machine can run at high speed and still maintain excellent quality. Therefore, equipment is not the bottleneck that hinder high-speed production, so why many spinning mills are still right?

Does the high speed look at the forbidden area? Is it a long-term experience and habit that restricts the power of challenge and high speed? We will make further analysis in the next issue.