1 Reasons for combing cylinder intarsia
1.1 The first row of cylinders is broken or collapsed
(1) The combing of the combed cylinders to the fiber bundles belongs to the gripping and combing, ie, the upper and the lower nippers grip the rear end of the whiskers, and the various rows of cylinders pierce the nipples from the nipper lip to the shrubs, and then Divide the combing forward, so the first row of needles suffers the most resistance to the fibers and is prone to wear and fatigue fractures.
(2) When the frontal area of ​​the cylinder used is too large or too large, or the working angle of the front needle is too small, the needle grip ability is too strong, or the front needle teeth are quenched but the hardness of the tip is not enough, it will accelerate The first row of needle teeth fatigue fracture.
(3) When the small volume is too heavy, the horizontal uniformity is not good, or the fiber straightness in the small roll is poor, it will also accelerate the first row of needle wear and fatigue fracture.
(4) The foreign matter in the fiber whisker first damages the first row of cylinder needles, and may cause broken needles or needles.
1.2 Unreasonable Transition of Rack Density
Embedded zigzag each rack of the same size, can be replaced with each other and free combination, so embedded zigzag total combing points can be more or less. Embedded cylinder is more suitable for spinning than adhesive cylinder. It is widely used by textile companies. However, the combination of racks of different densities is not arbitrary, and the degree of matching is also required. If the transition of the tooth density is unreasonable, it is easy to cause the first row of needles of the dense rack to be inlaid due to the filling of the bottom of the teeth.
For example, when spinning low Neps yarns, the rack density of a 90-degree insert cylinder is designed to be 43 T/cm2, 43 T/cm2, 84 T/cm2, 228 T/cm2, and 266 T/cm2, respectively. Carding point up to 41,000. Because the third rack and the fourth rack are very different in teeth, soon after the comber runs, it is found that the first row of the fourth rack has intarsia. Therefore, the fourth rack is changed to have a density of 199. The T/cm2 rack has no problem with the fourth rack inlay problem.
1.3 Brush status
The depth of the brush penetrating the cylinder, the line speed of the brush and the cylinder, the elasticity, fineness and stiffness of the brown hair of the brush directly affect the finish of the cylinder and even the intarsia.
1.4 raw cotton sugar content
When processing raw cotton with high sugar content, sugars in the raw cotton will liquefy and precipitate due to heat absorption, which increases the adhesion of the raw materials. This is not only unfavorable for the opening and combing of raw cotton, but also is not conducive to the removal of impurities, resulting in a large number of adhesive large impurities into the small combing volume. When the comber combs the small roll, large stickies of adhesive will stick in the backlash of the front area of ​​the cylinder to form intarsia.
A typical example of high-risk raw material that causes cylinder intarsia is the United States PIMA cotton. In production, we have found that whether it is cemented Graf cylinder or embedded Schilzlin, as long as it is a spinning sugary high In the case of PIMA cotton, the incarnation of cylinders quickly appeared. When processing raw cotton with low sugar content, Graf Xilin and Schircilin did not experience incarceration.
2 Eliminating the method of cylinder intarsia
(1) It is preferable to use the cylinder front area rack. In order to avoid the fracture and collapse of the first row of cylinders, the hardness of the tip should be high (HV800 or higher), the working angle of the teeth should not be too small (about 60°), and the tooth density should not be too large (25 T/cm2～45) The rack of T/cm2) serves as a front rack of cylinder.
(2) When combining the cylinder rack, the tooth density is a reasonable transition. Xilin's combing of the fiber whisker front belongs to progressive combing, its strength is from strong to weak, so the cylinder packing should be dilute to dense and reasonable transition. Otherwise, it is not only easy to cause incocolination, but also easily exacerbate fiber damage.
(3) Select a good brush and check the status of the brush periodically. At present, the brushes on the market are mixed, so be sure to use a brush with good elasticity, fineness and stiffness. Regularly check the diameter of the brush, adjust the speed or replace it at the right time to ensure the wire speed ratio between the brush and cylinder, and regularly check the depth of the brush penetrating into the cylinder to ensure the smoothness of the cylinder.
(4) When processing raw cotton with high sugar content, the opening and combing strength of the opener and carding machine should be strengthened to separate the impurities and fibers as much as possible; increase negative pressure of vacuum and fully utilize airflow Separation and absorption of impurities, so that large miscellaneous early falling less broken, small miscellaneous discharge, in order to reduce the raw material impurities.
(5) Optimize the volume of small rolls, improve the horizontal uniformity of the small rolls, and increase the parallelism of the fibers in the small rolls to reduce the fiber resistance of the first row of teeth and delay the decline.
3 Conclusion
The reason for combing cylinder inliner is mainly due to the fact that the first row of cylinders is broken or collapsed, the density of the racks is not reasonable, the state of the brush and the amount of sugar in the raw cotton are different due to the reasons for incoicing. Therefore, we must not stick to stereotypes on the issue of eliminating inland inflorescences, and must dare to break through and dare to innovate. After the above technical measures were taken, the cylinder intarsia was basically eliminated.
For more content, please follow this site
Bottle Opener keyring just like name, The reason we advise you make botter opener keyring. There are many functions ,not only it is a beer open tool in daily life but also you use if for promotional gift, advertising gift for keys or bags, but also it is have have very strong practicability. We can make it for use zinc alloy material ,aluminum alloy, stainless steel and so on .
Different designs: ring bottle opener, credit card bottle opener, blank bottle opener, bottle opener keychain, animal keychain,
bottle shape bottle opener, flower shape bottle opener, custom logo bottle opener, blank bottle opener keychain, customized bottle opener keychain, Cap shape bottle opener keychain.
Bottle Opener Keychain,Personalized Bottle Opener Keychain,Custom Bottle Opener Keychain,Cool Bottle Opener Keychain
Shenzhen MingFengXing Art & Craft Products CO., LTD. , https://www.mf-gift.com