Method for compensating tension of elastane yarns of vertical elastane yarn warping machine

Abstract

The invention provides a method for compensating tension of elastane yarns of a vertical elastane yarn warping machine. In the method, the total length of the elastane yarns and the preset linear velocity of a creel roller are inputted through an human-machine interface; a programmable controller divides the current elastane yarn into 20 equal parts in accordance with the total length according to the setting of the human-machine interface so as to obtain 21 points; tension values of the 21 points are detected by a yarn tension detecting device, and the final tension values of the 21 points are saved by the programmable controller, and a compensation curve is drawn; the length of the current elastane yarn is detected by an encoder, and the programmable controller calculates a compensation value of the elastane yarn corresponding to the current length according to a mathematical model; and the programmable controller can calculate the linear velocity of the creel roller of the current length according to the compensation value of the elastane yarn corresponding to the current length, which is calculated in the step d, and regulates the linear velocity of the creel roller so as to regulate the tension of the elastane yarn. The method can ensure stable warping quality for the elastane yarn under a condition of large variation of temperature and humidity.

Description

technical field [0001] The present invention relates to the field of textile weaving, specifically the compensation of elastic yarn characteristic curve, according to the tension compensation curve, by adjusting the linear speed of creel roller, thereby adjusting the tension method of elastic yarn, that is, vertical elastic yarn Compensation method for elastic yarn tension in warping machines. Background technique [0002] 1. Spandex [0003] Spandex is also called elastic yarn and Lycra, which is a kind of polymer synthetic fiber similar to nylon and polyester. Its main characteristic is that it has strong elasticity. Under the action of external force, it can be stretched seven times without breaking. Due to this characteristic, it can be mixed with other fabrics (such as 5%-20%) to be woven into elastic fashion clothing fabrics. [0004] 2. Warping [0005] Winding hundreds of yarn bobbins on warp beams is called warping, and the warped warp beams can be used for weav...

AI Technical Summary

Problems solved by technology

[0012] In the past, when warping elastic yarn, the control method was to use the pressure sensor to measure the tension of the yarn in real time. Since the elastic yarn is greatly affected by temperature and humidity, the tension value detected by the pressure sensor will be different when the same batch of raw materials is under different temperature and humidity. Different, the specifications of the winding head are inconsistent, and the warping quality is unstable, which affects the quality of the cloth surface

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