Do A Good Job Of These Common Problems To Ensure The Quality Of Blowing Carding Unit.

The diameter and number of carding neps will directly affect the number of yarn neps and yarn defects, especially the number of A1 and A2 yarn defects, and the short sliver rate will directly affect yarn strength, minimum strength, Mao Yu index H and weaving warp breakage. Blowing carding should not only control the traditional AFIS neps and short staple rate, but also consider the combing condition, the diameter of neps and the uniformity of fibers.

Common problems of cotton cleaning

The parameters of cotton grabbing are adjusted frequently, and the operation efficiency of the cotton picker is low. The running efficiency of the reciprocating cotton picker is over 90%. The depth and speed of grabbing can be determined according to the running efficiency of the cotton picker, and the depth of the drop should be adjusted reasonably to achieve the opening and loosening of the hatchet and ribs to the original cotton, so as to further enhance the opening effect of the cotton picker. It is necessary to strictly implement the speed and depth of the process determined, and eliminate the random adjustment of the cotton grasping parameters. Continuous cotton feeding is a key factor to ensure the uneven weight and raw material mixing effect. It is also conducive to ensuring the stability of cotton flow, ensuring the opening effect and the removal efficiency of cotton and hetero fiber. According to the composition and seasonal variation of cotton blending, we should timely adjust the speed of each cotton cleaning machine and the falling distance of cotton, and control the growth rate of neps and cashmere to a lower level, so as to ensure the effective removal of neps, impurities, short fiber and foreign fibers, so as to ensure the opening effect and mixing effect of raw cotton.

Common problems in carding

Nowadays, spinning mills often focus on the removal efficiency of neps and lint, but less attention is paid to the carding degree of fibers. Although carding neps and short liners are better, fiber damage may result from over combing, and yarn quality is not satisfactory. Carding is done by carding elements, and the combing elements are not in good condition, so they can not achieve ideal carding effect. The chain of the movable cover is stretched, the chain is not flexible, the wear of the movable cover and the fluctuation of the cover are common management problems of the enterprise. The wear of the heel and toe surface and the fluctuation of the cover often cause the spacing is not allowed. This happens when sliding friction and bearing rolling friction occur. The following points should be noted in the maintenance of the cover chain and the movable cover skeleton.

1) the length of the cover chain must be ensured to be within 76 mm of the whole elongation, and the root difference between two sides should be controlled within 3 mm. Secondly, the star type guide plate must be ensured to be free from wear, distortion and integrity.

2) regularly clean the chain and fill the gas, periodically measure the length, install the short root chain on the main transmission side, eliminate the difference between the length and the length, and prevent the cover plate from running parallel.

3) adjust the tension of the chain correctly, with the middle supporting feet as the main body, and the rear supporting feet as the auxiliary parts, and pay attention to the horizontal condition of the top of the adjusted movable cover, so as to ensure the tension on both sides is uniform, so as to eliminate the uneven sides of the sides and the excessive or too small tension.

4) pay attention to the lubrication effect of the lead powder block of the movable cover, ensure that the lubrication is good, stop the excessive resistance of the cover plate caused by poor lubrication, and extend the chain.

We should strengthen the management of Carding Clothing. Carding Clothing is not only a periodic part, but also a fragile part. In the management of card clothing, there are several problems in general enterprises.

1) the replacement cycle of card clothing is not clear, the use of card clothing is too serious, and even for more than 6 years, it does not pay attention to carding quality. It is suggested that the use cycle of the card clothing should be set according to the actual output and the quality of the card clothing, and the condition of the card clothing and carding quality should be observed at any time to ensure the use time of the card clothing and the quality of the finished product. For example, when the 100% cotton long staple cotton combed 7.4 tex, and the carding platform produces 24 kg/h, the import line brand of cylinder clothing will be used for 3 years, and the imported ordinary brand can be used for 2 years. The domestic first-line brand card clothing can be used for 1.5 years, which can meet the quality requirements of USTER 2013 bulletin.

2) the needle belt is injured and the disease is running on the machine. In case of accidental replacement of needle clothing, strict evaluation must be carried out. For accidental injury, the cause must be found and the two damage after the machine is eliminated.

3) there is no sound card clothing management regulations and the use of ledgers, the use of lax clothing, casual replacement. It is suggested to set up the replacement account for the card clothing, constantly carry out the optimization test of the card clothing type, and select the brand and model suitable for the enterprise and cost-effective. If the varieties are changed frequently and the raw materials change greatly, it is suggested that the general card clothing should be selected and the yarn quality level between different raw materials should be considered.

According to AFIS test, neps will increase more than 2 times when the suction tube of the carding machine is blocked. To ensure that the suction system of the carding machine is smooth is also conducive to ensuring the quality of carding sliver. The key to ensure the smooth ventilation system of the carding machine is that the dust quantity is suitable, and the two is to check and remove the running personnel in time.