greyyarn

The internal key of the coupling between the roller drive

Check whether the roller transmission gear and shaft and key pin are loose and doze and wear. The short pile and fiber accumulate in the round sealing plate at the bottom of the top winding device. Cleaning and combing cause more fiber damage, resulting in high sliver short-pile growth rate; poor fiber separation and orientation in the sliver, bundle fibers and chaotic fibers; 3. The fine, combined, and coarse up and down cleaning devices are not effective, resulting in the accumulation of velvet belts and piles on the pile board into the sliver; 8. Answer: The roving spitting head has the following reasons: 1.

The fibers on the velvet Draw Texturing Yarns factory on the drape are scraped into a pile of velvet and brought into the drafting zone by the velvet cover And dropped onto the drafting bar; the lower cleaning apron is damaged and the hanging flower is brought into the sliver by the lower roller; 3. The roving roller head has vibration: the roller drive shaft (roller synchronous belt wheel shaft), the roller head section, and the roller head section have different axes;

the internal key of the coupling between the roller drive shaft and the roller head section and The key groove is worn out; the roller bearing at the connection between the roller head and the roller head is worn or knocked; the bearing in the bearing housing of the roller drive shaft is damaged; 2. The draw bar and roller sticky flower are attached to the sliver; 6. Due to unreasonable process design such as roving roller gauge, jaw distance, top roller pressure, draft distribution, etc. 58.

The channels of combing, finishing, merging, thick beard and yarn are not smooth, causing sticking, Hanging, winding, accumulating, and belting; 7. When the feeding is biased, the output is biased when the leveling is turned on, indicating that the leveling strength is weak. The 61a version of HSD961AL, the adjustment rate formula (taking 8 feed bars as an example): the current adjustment rate (set to 100) ’the average weight of the output of 7 feeds minus the average output of 9 feeds

Combining the use period and the sliver quality index level

Combing Colorful Yarn Suppliers process (1) The quality of small rolls is better: the small rolls should have a uniform structure, clear layers, non-stick rolls, and good fiber orientation and straightness. (3) During production, the rollers and top rollers must be free of entanglement and damage to the top rollers, otherwise a large number of slubby yarn defects will be generated, which will increase the number of broken ends and produce a large number of belly-bellied yarn defects. (9) In order to reduce man-made defects, a jointless operation method should be established for the entire barrel to change sections. (7)

Combining the use period and the sliver quality index level, timely replacement or grinding of the needles, cover plates, spur rollers, and doffer card clothing are the basis for ensuring carding quality and stable product indicators. (4) The delivery speed directly affects the output and the quality of the sliver. However, from the perspective of saving cotton and reducing costs, an excessively high nodding rate Means higher costs.

The quality of the combed sliver is positively correlated with the quality of the finished yarn. (3) Qinghua arranges the packages according to the package diagram. (6) Roller and top roller entanglement spinning is not allowed, especially the second roller or top roller entanglement will cause a lot of continuous coarse details, directly causing coarse details of the spun yarn more than 2 meters, harming the yarn and cloth surface quality. (6)

After the raw materials are blown by each machine, the short pile and neps will continue to increase, so the growth rate of short pile and neps must be reduced by optimizing the beater speed and gauge. It must be kept in a straight line, and cross and friction are not allowed. When the basis weight is high, the output is high, but the carding quality is affected. 2 The quality control points of the carding process The carding process masters the principle of the process: the card clothing is sharp and no damage, ensure the four fronts are accurate, ensure the reasonable needle surface load and carding degree, strengthen the transfer, improve the carding quality, reduce the slivers and impurities Short pile rate.

A long-awaited technological advancement in an industry

Using small diameter and low height cans, the sliver capacity is much smaller than that of ordinary cans, and the Polyester Sd Yarns Manufacturers change frequency of draw frame can be increased several times; the capacity of full package sliver cans is also smaller than that of roving bobbins. In the industrial production of ring spinning, under the conditions of the current mainframe equipment structure and special equipment configuration, as well as the use of the latest advantages of the spinning process technology, each process function, quantitative and drafting capabilities, semi-finished products and yarn Quality and comprehensive technical and economic performance are in a relatively balanced platform area.

A long-awaited technological advancement in an industry. The original designed plant area can only arrange one-third of the spindles. Stretching device (see Figure 4), so it is necessary to change the roving frame of the spinning frame to a creel frame, and the active guide bar feeding structure is also adopted. However, from the perspective of industrial application, this technical solution still has the above-mentioned drawbacks. This program has some applications in Japan. If a super-large drafting device with a maximum total draft of 400 times or more can be designed, it can be fed directly with a sliver of 5 to 6 g/m. The following gives three technical solutions for feeding the sliver guide sliver into the spinning frame.

The difficulty of replacing the can package and guiding the sliver is also increased. Therefore, this is a ’pseudo-progress’ without industrial application conditions. If in order to prevent the sliver from stretching unexpectedly, the single-spindle conveyor belt guide method similar to RingCan spinning machine technology is adopted, so that the investment cost of each spinning machine increases even more.

The technical and economic disadvantages are obvious. There is still a lot of room for local improvement and improvement, but the confirmation of the new spinning process technology structure that changes the current status still needs time. In addition to the increase in fixed investment in related equipment such as factory buildings, power supply, and air conditioning

The effect is reduced and the long fibers in the excessively small

Under the condition of heavy sliver weight, in order to meet the carding effect, the cylinder speed must be increased accordingly to meet the requirements of carding and fiber straightening.5-22.2 Design points of the carding gauge under heavy weight conditions 2.3 Cover plate speed Increasing the cover plate speed will increase the efficiency of neps removal and increase the cover plate flower.4 Doffer Wholesale Polyester Color Yarns speed Doffer speed is related to fiber transfer effect and output and quality. (2) increase the carding area, such as increasing the width of the cylinder, adding additional carding elements, etc. 2. Good, good carding effect, less fiber damage; too large design, insufficient opening, more fiber nodding, too small fiber damage and short pile. Therefore, the characteristics of re-quantitative carding are as follows: (1)

Input quantitative increase. Under the condition of re-quantification, the thickness of the quilt increases, and the number of unopened fiber bundles also increases. 2. The focus of the process design of the front web cleaner is to actively divide the air flow of the surface layer of the cylinder using a dust removal knife to achieve the purpose of separating impurities and short piles; the small separation of the cylinder-cotton cleaner is strong and the clearance is too large to remove

The effect is reduced, and the long fibers in the excessively small lint increase. However, if the cylinder speed is too high, fiber damage will increase and yarn defects will increase.1. The gap between the general spur roller and the cotton feeding board: reverse feeding, 0.2.

Therefore, the transfer rate can be controlled on the high side, and it is beneficial to the product quality to increase the doffer speed moderately. See Table 4 for a comparison of specific gauge forms. At the same time, the exposure of impurities is obvious.6. As can be seen from the table, in the case of card clothing encryption, although the quantitative increase, but the number of single fibers subject to comb teeth is guaranteed to be within a reasonable range, the quality has been significantly improved. The distance should be large. See Table 5 for the comparison of the process setting types.

The stock solution fiber for the fine and ultra-fine fibers

In order-mixed raw materials, it is better to choose synthetic fibers with better rigidity for sensitive color fibers, and use less cellulose fibers or thicker cellulose fibers.

(2) When dyeing fibers are needed for order color matching, the first is to consider the selection of neutral and main colors; the second is to use thick fibers for dyeing according to the overall quality requirements to reduce the fiber performance after dyeing Hidden quality of neps caused by damage.

(3) In order to ensure the overall quality level of the finished yarn, it is better to use the stock solution fiber for the fine and ultra-fine fibers, and priority is given to the fibers with better rigidity. When using fine and ultra-fine cellulose fibers, proper pretreatment can be performed according to the actual order color and raw material conditions.

Production practice control

In the production process of chemical fiber blended color spinning, in order to control the yarn neps, the main control points are raw material spinnability, fiber damage and carding degree, drafting process settings, machine cleaning, etc.

Spinnability of raw materials

The spinnability of the raw materials in the order directly affects the quality of the turning operations and the quality of semi-finished products. When arranging cotton blending and production processes, attention should be paid to the spinnability of the raw materials. The spinnability of raw materials for chemical fiber blended products mainly depends on fiber selection and pre-spinning pretreatment methods. Only by improving the spinnability of raw materials can we better control the spinning quality.