Discussion On The Cause Of Twining Of Leather Roller

In the production process, due to the differences in geographical, climatic, raw materials, process parameters and other factors, the problem of cot winding is widespread, which leads to the difficulty of workshop life and the more serious impact on product quality. At present, all cotton textile enterprises are troubled by this problem to varying degrees. At the same time, they are actively seeking effective measures to control cots. What are the reasons for the cotwing of COTS?

Electrostatic winding

Any two contact objects will generate static electricity after separation, and the static charge has the characteristics of distributing on the outer surface of the object. Friction can be seen as a phenomenon of constant contact and separation, so the phenomenon of tribo electrification can be seen everywhere in life.

In the process of drafting, slow or floating fibers should gradually change into fast fibers, so there will be friction between fibers and fibers. Generally speaking, the same substance will not generate charge redistribution when contacting with the same substance, but the fast fiber is in contact with the rubber roller. It is necessary to consider the fast fiber and the front cots as a whole. At the same time, cots and fibers are constantly contacting and separating, which is another reason for static electricity generation. Assuming that the surface area of the cot is gathered enough charge, then the next fiber reaches the surface of the jaw when it reaches the jaw. At first it is just a few, and then more and more, it forms a twining.

Two, fiber embedding

Sometimes cracks occur on the surface of cots, which are not always visible to the naked eye. The type of coating on COTS is mainly divided into coating type and permeable type. After coating the coating, a layer of film is formed on the surface of the rubber roller. In the process of drafting, in order to ensure enough pulling force, it is necessary to exert great pressure on the cots and form the friction boundary. The deformation of the rubber roller is caused by the deformation of the pressure and the large pulling force. The surface of the cots is easy to crack. Sometimes it is the cracks in the coating. Sometimes even the cracks appear in the coating due to aging. Under the action of pulling force, the cracks are magnified as far as possible, and the fibers enter into the cracks. When the cracks pass through the friction boundary, the cracks are tightened. At that time, the fibers are tightly embedded and eventually lead to entanglement.

Three, the surface cleaning of cots.

Natural cotton fibers contain cotton fat and cotton wax, which will inevitably be transferred to cots during drafting. If the washing and maintenance work is not done well, it will be difficult to remove a mixture of milky white cotton and cotton wax on the surface. The black cot is particularly obvious. Of course, the cotton wool and cotton wax in this form will not adhere to the fibers, but the speed of the front cots is relatively high. After a certain period of time, it will be heated and the temperature will rise. The viscosity of the mixture of cotton and fat and cotton wax will increase, and the fibers may be adhered to the surface of the cots, which will eventually cause entanglement.

Four, other aspects

Workshop management is not in place, the cleaning condition is not good; the surface of the cots will also be wound and wound. Clogging of suction passages can also cause entanglement.

In conclusion, it is necessary to carefully analyze the causes, find the problems and take different measures to solve the problem.