Spinning yarn weight ､ High speed and large packages require a stable raw material base, mature spinning equipment, periodic repair or replacement of spinning components to ensure long-term and stable cotton yarn quality. During the sliver drafting process, It can effectively control the fiber movement, move the fiber shift point forward, and reduce fiber diffusion.It is one of the most critical equipment that affects the product quality of spinning enterprises. Its performance has attracted the attention of spinning companies. Improve production efficiency and reduce production costs｡
1, bearing ､ hose storage and rubber roller processing technology
(1) Before purchasing hoses in batches, the selected hose model ､ specifications ､ performance ､ yarn quality can be achieved in the chest, bearings between rubber rollers ､ rubber hose storage account, mainly recording different bearings ､ rubber hose storage content includes: Hose model ､ Geometry ､ Outer packaging mark ､ Surface color ､ Roundness ､ Hardness and elasticity, whether there are cracks and delamination on the surface, whether the thickness of the pipe wall is uniform, etc.｡
(2) Newly purchased iron casings and mandrels are inspected. Strict quality acceptance technical standards. When making rubber rollers, the iron casings and mandrels must be inspected first to eliminate unqualified products. Adhesive aging is a principle｡
(3) Pay attention to the cleaning and processing of the surface of the rubber roller bearing iron shell to avoid deformation of the surface of the rubber roller, which will increase the unevenness of the yarn sliver.｡ Strengthen the rubber roller sleeve and rounding and shaping work to prevent the rubber roller from eccentric ､ displacement and damage. The bearing is worn out, and the rough and fine grinding of the rubber roller is well done. The diameter deviation and surface flatness of the rubber roller after strict grinding are strictly controlled. After grinding, the diameter difference of the rubber roller of the same trolley does not exceed 0.03mm.
(4) When the polished rubber roller is stored, avoid light exposure, avoid aging of the rubber layer, and affect the service life and yarn quality. 进口 For imported rubber rollers, generally no surface treatment is required, and they can be directly loaded on the car.
2, the use and management method of rubber roller
1 (1) The same production type must choose the same type of rubber roller and adopt the same surface treatment method, which can reduce the difference in the dryness and reduce the CVb% of the dryness.
(2) Each process is flat-rolled, and the rubber rollers that are dismantled and changed are sent by the equipment maintenance personnel to the rubber roller room for handover and signature.The rubber roller room is responsible for checking the replaced rubber rollers to remove the blades, aging, etc. Top rollers are strictly prohibited
(3) The gears are classified according to the diameter of the rubber rollers, classified and regrinded, and refueled. The maintained rubber rollers are installed on the car. When the new rubber rollers are made and loaded on the car, they must be put into use after the spinning test has passed the standards and established. Vehicle tracking mechanism to determine the life cycle of rubber rollers
(4) Establish the responsibility area for special personnel to contract the spinning frame, get on the car and touch the rubber roller once a day, strengthen the dynamic management of the operation of the rubber roller, and timely remove the rubber roller that is deformed, entangled, and damaged in the concave, and combined with the car inspection Replace the unqualified rubber roller｡ Track the unqualified rubber roller｡
3. Selection principles and cycle management of rubber rollers
(1) Good antistatic, anti-winding and abrasion resistance, especially to improve the ability to recover from transient deformation. It is the best choice for enterprises to choose rubber rollers. The expectations of cotton spinning companies for rubber rollers are that they can be loaded on the car after no treatment or micro treatment Use, regrind cycle is more than 3 months, good spinning quality and good stability
(2) During the production process, the principle of diligent grinding and less grinding is used to keep the rubber roller on the car in a good running state and maintain the stable yarn quality.
(3) The selection of the hardness of the rubber roller is mainly determined based on the number of spinning and the performance of the fiber. The hardness of pure cotton varieties can be controlled at about 65 degrees, and the hardness of chemical fiber varieties can be controlled at about 75 degrees. The new cellulose fibers can refer to the cotton varieties. OK, but to prevent corrosion and swelling of the rubber roller surface, foaming, entanglement of rubber rollers, new spinning technologies such as Siro spinning and compact spinning, all use micro-guided yarn movement or non-movement, and the rubber roller cycle should be far lower than traditional Spinning Technology｡
(4) The selection of rubber rollers takes into account the quality indicators, production conditions and service life.The front rubber roller should use aluminum liner rubber rollers as much as possible, and the rear rubber roller should use single-layer rubber rollers and small diameter aluminum rubber rollers, which can reduce costs. ｡The rubber roller with strong spinnability can be used to avoid adjusting the labor intensity of the rubber roller between the rollers when the fiber material changes.
(5) Pure cotton products can generally be treated without treatment or ultraviolet light to avoid aging of the rubber roller and shorten the life of the rubber roller. Therefore, the life of the rubber roller can be controlled for more than 3 months. Generally, polyester products can be treated with coatings. Polyester is prone to entanglement during processing.You should observe the production of rubber rollers on the car, and remove the entanglement with flowers caused by the heat of the rubber rollers at any time. Resolutely eliminate the use of steel hook knives to treat the rubber rollers. Get off the rubber roller, check the unqualified rubber roller, and replace it at any time. Be careful to avoid mixing new and old. New cellulose fiber products can generally be used for trial spinning. Experimental comparison analysis. Production conditions control the life cycle of the rubber roller. Production of spandex Core-spun yarns have aggravated abrasion due to the non-guided yarn path, especially the friction between the front rubber roller and the spandex yarn. Grooving and foaming often occur. The use of soft elastic rubber rollers has better results. The production of core-spun yarn will inevitably produce a certain degree of groove phenomenon, so the replacement of other varieties requires the replacement of rubber rollers.
(6) In the context of the economic downturn, most textile companies have experienced multiple varieties and small batches, which caused frequent number changes, resulting in difficulties in the use and management of spinning rollers, and increased labor intensity for workers. Pure cotton varieties and new fibers For plain fiber varieties, rubber rollers with lower hardness can be used. For polyester varieties, rubber rollers with higher hardness can be used instead of changing according to the yarn number, which reduces the labor intensity of workers and the probability of rubber roller replacement errors. After that, it is necessary to strengthen the monitoring of the running status of the rubber rollers in the machine to avoid the wrong use of the rubber rollers. At the same time, it should avoid the use of products of the same variety, multiple batches, and multiple manufacturers at the same time in one area.
4. Color management of rubber skin
After the rubber roller is regrinded after each use cycle, after the regrind, the diameter of the hose will decrease, and the hardness of the rubber roller will increase to varying degrees, resulting in unstable product quality before and after regrind of the same variety. ｡ Therefore, spinning companies use different colors of rubber shells to distinguish the diameter of rubber rolls.The color of rubber shells mainly considers the production of the same fiber, and when producing different numbers, from the perspective of product quality, the same number Use the same color rubber roller to ensure the relatively stable yarn quality.
5 Conclusion
Under the continuous update of spinning technology, spinning rubber rollers must not only adapt to the needs of the development of spinning technology, but also consider the production cost.
Hose storage and rubber roller processing technology are the basic conditions for the use of rubber rollers. The management method of rubber roller use is to ensure the stability of product quality. The selection and cycle management of rubber rollers are effective measures to stabilize the product and reduce costs. Shell color management is an urgent need for refined management of modern enterprise rubber rollers.
