INVESTIGATION OF RAW SILK THREAD TENSION DURING WINDING COCOON

The principle of operation and the work of the automatic cocoon-reeling machines are the same. The linear density of the yarn is controlled and regulated by the plot tension force change in raw silk. Yarn stretching deformation in the loop has a local character and does not cover the next areas after the loop. The thread in the control device is in a stretched state and undergoes a certain deformation and is wound on the reel in a wet condition. During the drying of raw silk yarn the tension increases. As a result of investigations it was found that the thread tension before laying on the reel is more than 8 cN, elongation at break of the filament is reduced significantly.