Correct maintenance of the apron can keep the quality of the apron in good condition. When the apron is in operation, the fibers affected by the drawing force are constantly rubbing against the surface of the apron, and between the roller and the inner layer of the apron. After a period of use, the surface will be rough, grooved, damaged and stained by fiber impurities, resulting in The friction factor on the apron surface increases, thereby destroying normal drafting. Therefore, the apron must be maintained periodically to prevent yarn defects and breakage caused by defective apron. In addition, periodic replacement can restore the elasticity of the rubber ring and prevent early cracking caused by operating fatigue, thereby extending the service life. The use conditions of apron are different, so the maintenance period is also different, which should be determined according to the requirements of spinning variety and process settings.
Replacement cycle
The replacement cycle can be combined with a small flat car or a wiper car. As the equipment With the replacement of new generations, textile factories are employing fewer and fewer workers, and equipment maintenance has undergone fundamental changes. For example, large flat cars have been eliminated, and even small flat cars and partial maintenance have been eliminated. Only maintenance is used to maintain equipment. Therefore, replacing the rubber ring can be done regularly by inserting it into the maintenance content. The establishment of the replacement cycle varies depending on the conditions of use, and is generally determined according to the variety and process requirements. When cotton wax, sugar or synthetic fiber grease is deposited on the surface of the rubber ring, it must be replaced. Clean the replaced apron with high-quality cleaning agent in a washing machine with a water temperature below 60 ℃, and rinse with tap water. In areas with high alkali content in tap water, water with improved water quality should be used for cleaning. Otherwise, the cleaned rubber ring will easily become twisted after being put on the car.
Replacement cycle: 3 to 6 months for spinning cotton with spun yarn and apron; 2 to 3 months for spinning chemical fiber blending; about 3 months for cotton spinning with roving apron, and 0.5 to 0.5 for blending. 1 month; when spinning pure cotton, if you encounter raw materials with high sugar content or dirty cotton, the apron application cycle needs to be shortened to facilitate smooth spinning.
Update cycle
After the rubber ring has been running for a period of time, mechanical fatigue will occur, and webs will appear on the surface. Like cracks. Cracks generally occur first at the molecular interface or the interface of the vulcanized rubber mixture. The mixture has poor compatibility and the larger the particles, the more obvious the interface, and the easier it is to produce cracks. When slight cracks appear on the surface of the rubber ring, the cracks will extend quickly under the action of flexural stress; at the same time, ozone molecules invade the vulcanized rubber, causing the rubber molecular chains to slowly break, starting on the surface, and then gradually deepening, destroying The effect is getting bigger and bigger. Therefore, at the beginning or before mechanical fatigue occurs, the apron needs to be updated, otherwise short lint and flying fibers will be caught in the yarn, causing yarn defects and affecting the spinning quality.
In recent years, the formula of apron products has been greatly improved, which makes the apron delay mechanical fatigue. After the improvement, although no cracks were found on the surface of the apron, the surface hardness increased and the elasticity weakened. During the drafting process, the friction factor decreased, and the +35% short slubs increased significantly, which directly affected the spinning quality; due to the larger It is difficult to find out the cause, and the rubber ring should be renewed periodically.
The determination of the apron update cycle is related to the host machine model, spinning variety and production environment. Under normal circumstances, the renewal cycle of pure cotton apron is 1 year; the upper apron of chemical fiber blended type is about 9 months, and the lower apron is about 6 months; if the pressure is high, the use time should be shortened. When updating, the entire unit or batch should be replaced, the upper and lower rubber rings should be matched with old and new ones, and attention should be paid to partition management. </p
