Mainly silk singe and cotton yarn singeing. The silk is a product of crepe spinning. It has to be singed due to the long hair on the surface and the adhering coarse particles and crumbs. After singeing, the ash of these bristles and rough granules form a spherical induration and are not easily removed from the surface of the crepe. Therefore, a plurality of nail caps are arranged on the silk singeing machine, and the silk thread is wound around the rotatable nail cap with a certain tension, and reciprocates 5 to 9 times through the flame mouth, and the ash is removed by the friction of the nail cap and the yarn, and then the coil is rolled. Wrap around the bobbin.
The main process conditions for singeing are: flame temperature, the speed of the filament through the flame, the distance between the crepe and the core, the number of nails, the tension and the number of singeing. These conditions are generally determined based on the quality requirements of the finished product. The smoothness of the silk after singeing is called the cleanliness of singeing, which is one of the indicators for the appearance quality of crepe. Cotton yarn singeing is mostly used for the production of cotton yarn for woven fabrics, sewing threads, embroidery threads, etc. The process conditions are similar to those of silk singeing, but the ash is easily removed after burning of cotton fibers, and singeing is not A capping device is required. After the singeing of the yarn, the weight per unit length is reduced, that is, the number of counts is increased. Therefore, the singeing loss should be considered in the process design to ensure that the yarn count meets the requirements. The heat source of the yarn singeing machine is usually gas, and other heat sources are also used.