With the rapid development of spinning technology, high-quality raw yarn is more and more popular, and spinning companies continue to improve their product quality in order to meet the needs of future customers. The carding machine is the heart of the spinning process. As the core component of the carding, card clothing has always been the focus of attention of various spinning mills. The modern carding machine maintains high-yield fibers with good combing by increasing the speed of the cylinder and adding the combing elements on the licker and the cylinder, thus ensuring high yield and high quality.

First, carding is the basis of the quality of the latter

Modern carding machines are greatly improved due to the high precision of mechanical manufacturing and assembly. High-speed production is also a matter of course. However, all high-speed and high-yield products must be under the premise of high quality. Otherwise, they cannot be regarded as high-yield in the true sense. Therefore, engineers and technicians should use the existing equipment, equipment testing and process optimization to control the quality of the carding machine, and lay a good foundation for the spinning of high-quality raw yarns in the subsequent process. The quality indicators of the card's influence on the rear road are the sliver weight and unevenness, the dry value, the neps, the cotton and the short velvet and the coarse yarn yam index, etc., but to achieve good quality of the carding, it depends on The mechanical and carding function of the card.

The quality control of the carding process should focus on the degree of separation of the fibers, that is, the fiber bundle is decomposed into a single fiber state. The fiber has a high degree of separation, and the proportion of the spinnable fiber is large, and the drafting unevenness is smoothly achieved. The adequate separation of fibers and nodules is also a prerequisite for the removal of nodules. The fiber's single fiber state also ensures better fiber mixing. The fibers are straight, the cotton is large, and the content of the short velvet is small, which ensures that the fibers are not entangled or entangled during the drawing process, and the neps are less.

The carding process is basically the last procedure for the carding process, so the neps and impurities should be removed as much as possible. In the production of combed varieties, the carding process is also related to the combing process, which is the reason why the combing speed of the combed joint has a higher rate of combing and the combing is smaller than the carding. At the same time, it is also very close to reducing the burden of combing and achieving high-performance combing. The removal capacity and the increase range of the neps of the card have a great influence on the quality of the back channel, and it is also the guarantee for the yarn-forming neps.

With the increase in the output of high-yield carding machines, the problem of the decrease in quality (such as neps and strength) caused by the increase in short piles has become increasingly prominent. The short pile rate is closely related to the quality of the yarn. The increase of short velvet, the proportion of spinnable fiber is small, the dryness of each strip will be deteriorated, the yarn crepe will increase, the number of flying flowers will increase, and the entanglement will be increased, so that the short and thick knots will increase the number of yarns (100,000 meters of yarn 疵) Some experts believe that for every 3% increase in short velvet, the dry CV value deteriorates by 1%.

Second, strictly implement the maintenance plan

In order to ensure that the yarn quality meets the needs of high-end customers, the requirements of the carding process should be standardized and provide an effective basis for controlling the quality of the carding. At the same time, it is necessary to clarify that the quality of the front road is the premise and basis of the quality of the yarn. Only when the quality is closed on the card can the quality of the semi-finished product and the quality of the yarn be stabilized and improved. There are many quality control methods in the carding process, and each spinning company should take corresponding measures according to the characteristics of their respective enterprises. Our company starts from equipment maintenance, process adjustment, enhanced carding, standard operation and control of temperature and humidity to ensure effective control of carding quality.

Equipment maintenance is a prerequisite for quality control. The maintenance of equipment needs to be systematic. Our company makes full use of advanced testing instruments to track and test the carding platform to ensure that the machine and equipment are in the best maintenance cycle. Due to the design structure and mechanical properties of the carding machine, there is a difference between each carding machine. For example, the structure of the new high-speed carding machine and the old carding machine have certain differences, the mechanical properties of the carding unit and the traditional There is also a certain difference between the laps, that is, the manufacturing precision between the same manufacturer and the card of the same model will be different. Therefore, the advanced USTER AFISPRO instrument is used to detect the nep and linters of the machine and form according to the indicators. A more practical and practical dynamic equipment maintenance schedule.

Under the general maintenance plan of the card maintenance, 80 carding machines of the company's spinning branch are in the cycle maintenance plan, and the corresponding maintenance cycle is also established for the carding components of each car, such as the comparison mill. The test data before and after the cover showed that the carding condition improved significantly after regular maintenance.

The company's original carding machine maintenance cycle is one car per car in January, and Xiaoping is once per car per year. After a year of exploration and tracking, the company finds a reasonable maintenance cycle method, which is combined with the AFIS of each stand-alone test. The number of neps and short fiber content indicators, the development of a random and regular card maintenance cycle. According to the indicator and the condition of the platform, it is determined whether the platform should be maintained, and the equipment maintenance and equipment configuration ledger of each card is established.

Track the key quality data of the existing carding machine. For example, according to the change of the number of neps and the content of the short velvet in the raw strip, analyze the card with poor index in time, establish a maintenance plan, and ensure that each card is always available. In the best condition, the quality of the sliver produced is stable, so that the problem can be solved in a targeted manner, which saves manpower and financial resources and reduces unnecessary waste. The company has established a histogram for the cotton knot index of each card (same variety, same model). It can be seen from the histogram which cards are in poor condition and should be included in the maintenance plan.

Third, the machine status should be tracked for a long time

However, it should be reminded here that it is not possible to determine the condition of a carding car with one or two data, and it is necessary to pass the average statistical value of the test data several times. Because the data is random or volatility one or two times. After using the production process quality (cotton) control chart, the quality of the sliver is effectively controlled to ensure that the carding process is in optimal process control. At the same time, the cotton knot tracking is performed on each single carding machine, and the optimal maintenance cycle can be determined, thereby effectively stabilizing the carding quality and improving the operating efficiency of the carding machine.

The quality is relative, because it is compared with the control standard, then how is the control standard formulated? Take the nep as an example, the company decides on two aspects. One is the cotton knot (grain/g) of the carding machine in the carding workshop. At least one card was tested at least once a week, and the average of the neps in the carding shop was determined using a three-month result. The second is a different spinning system. In ring spinning, the number of fiber cottons of the coarse and medium yarns should be lower than the equivalent number of rotor spinning, because the yarns produced by the two spinning systems are formed differently. For fine yarns, ring spinning and rotor spinning systems should be kept at the same level.

Jiangxi Donghua Machinery Co., Ltd. specializes in the production of polypropylene spinning machine, polypropylene strong spinning equipment, polypropylene high-strength spinning equipment, polypropylene spinning machine, polyester spinning machine, aramid 1414 fiber spinning equipment, DHP419 series high-strength polypropylene Spinning drafting machine, polypropylene spinning machine, DHP418 series polypropylene spinning drafting machine, DHkv1235-12 type polyester spinning machine, DHPE high-strength high-modulus polyethylene fiber spinning equipment, DHTA type aramid fiber 1414 fiber spinning equipment, HDZF3 High-vacuum dynamic drying-solid-phase viscosifying machine, polypropylene spinning machine.