Study on spinning process and constant tension control system of absorbable suture

In the producing process of absorbable suture, in order to solve the problem of suture diameter and the tensile strength are uneven, constant tension control system of absorbable suture is designed. Detection device using three rollers tension sensor whose sensitive element is the resistance strain gauge; Control device using programmable controller; Execution device using three-phase motor; Display device using we in view touch screen. Experiments show that the constant tension control system can control the controlled tension error in less than 0.1N. The system has good real-time performance and high reliability. The suture made by the constant tension control system is completely in line with the standard of the USP thirty-second edition of the collagen suture.