What Is Fancy Wavy Yarn? How To Solve Problems In Spinning Process?

In recent years, the demand for fancy yarn has become more and more diverse in the market, and the quality requirements are higher and higher. As a new type of fancy yarn, wavy yarn has been used as a new type of fancy yarn in recent years. fashion Dress design brings rich inspiration and meets the demand of market consumption for product quality improvement.

What is fancy wavy yarn?

Wavy yarn is a new fancy yarn with richer structure form based on the yarn structure of ordinary slub yarn. It has unique appearance and yarn structure. Its yarn shape is wavy, and the coarse pitch is different from the base yarn density in the length direction of ordinary single yarn. These coarse sections consist of a group of wavelets, which look like waves on the surface, and N wavelets form a wave.

　　 Where is the difference between fancy wave yarn and ordinary slub yarn?

Ordinary slub yarn is made up of three elements: pitch, pitch and pitch. Its structure and characteristic parameters are shown below. Among them, A1, A2, A3... Indicates the slub length; B1, B2, B3... Indicates the pitch length; D1, D2, D3... It shows the density of slub yarn, and the arrangement of slub yarn is divided into two types: regular and irregular.

　　 Wavy yarns are composed of five elements: wavelength, wave length, wave base, wave crest and trough. Its structure and characteristic parameters are shown below. Among them, A1, A2, A3... Indicates the length of wave; A1, A2, A3... Wave length; B1, B2, B3... Indicates the length of wave bottom; D1, D2, D3... Represents the line density at the crest. The number, line density and length of each group of wavelets can be changed arbitrarily, and regular and irregular yarns can be spun randomly.

　　 What are the problems and solutions in the spinning process of wavy yarns?

1. broken ends and scattered ends.

In the process of spinning, the whole breakage can be focused on the following 4 reasons: (1) whether the process parameters are reasonable, whether there is any abnormality; (2) whether the gear meshing drive has a beating phenomenon; (3) whether the operation of parking and shutdown is proper; (4) electrical failure.

In addition to the above reasons, the following factors should be considered when dispersing the broken ends: (1) the shorter the wavelength, the greater the ratio of the line density to the base yarn density at the crest, the more the broken ends. In the design of wavy yarns, it is necessary to satisfy the short wavelength matching with low magnification and long wavelength matching with high magnification. (2) the properties of the suitable spinning materials should meet the needs of the yarn varieties, and the high wavy yarns can not be made with low grade raw materials, otherwise the breakage rate will be high and the production efficiency will be affected.

　　 2. no slub or yarn becomes lighter.

Some cotton mill technicians are accustomed to using the mechanical spanmission ratio as a heavy tooth instead of changing the total draft value of the base yarn. This method is not appropriate. (2) when the technological parameters of the operation panel are modified, it is necessary to stop the spinning process. When the twist of the spinning frame is changed, it is necessary to return to the interface and then drive it to prevent the slub yarn from being mistakenly set to flat yarn. (3) some manufacturers in order to prevent the breakage caused by the sudden power failure, the butterfly tooth one-way bearing is adopted, and the later bearing damage is not effective; (4) the roving is quantitatively unstable; (5) the interference of the encoder is too large; (6) the spinning category, technological parameters, process gear matching and so on are set mistakenly. During the spinning process, no slub or yarn support has become lighter. It can be checked one by one in the following situations: (1) the spanmission ratio of spinning process is not accurate.

　　 3. the actual line density of wavy yarn is larger than that of set line density.

When spinning wavy yarns, if the actual yarn linear density is much larger than the set line density, the main reasons and solutions are as follows: (1) the parameter settings are wrong; (2) the process number is directly spanferred without updating confirmation; (3) the line density at the crest can be set higher than the actual one.