Study On The Rapid Yarn Twist Setting

Microwave is the wavelength of 1mm-1m, corresponding to a frequency of 300MHz-300GHz electromagnetic waves, in the case of the electromagnetic spectrum, ultra-high frequency electromagnetic waves, electromagnetic waves in this frequency range have been successfully applied in industry, television, microwave communications, radar and satellite communications.Microwave has wide applications in industrial and agricultural production. Microwave technology has been used widely in the textile industry, for its energy-saving features,has become one of the hot high-tech development of textile.The paper designed 20GB microwave yarn setting machine, explored the effect of the factors affecting yarn setting using cotton yarns and comparised microwave steaming yarn and yarn steaming effect. The study includes the following:(1) Experimental instrument design related improvements in performance testing and equipment:microwave frequency of choice, the choice of transformer and the microwave cavity area after repeated selection of these are arguments to conclude. Through the microwave region uneven nature of microwave testing of the equipment proposed improvements and equipment related to power-related aspects of testing and optimization of rotary speed. The results show that after the installation of microwave mixers microwave uneven areas of significant improvement. Output power at 0-10kW, the instrument and test the power of linear output power is better. Wheel speed selection 3r/min, is the better choice.(2) Yarn microwave setting experiment:First, a single cheese and, by experiments, analysis of yarn moisture regain, microwave power, reaction time effect on the setting, optimizing a single cheese microwave setting process. To the experimental results of a single cheese, based on the entire package yarn setting test, draw the whole package of yarn setting process. Experiments show that the moisture regain of 12% cotton 14%, the microwave setting with good results. Microwave power setting should not exceed 8kW, setting the yarn more, you can improve the setting time by the appropriate setting to achieve results.(3) Evaluation of Microwave setting:A steaming yarn and yarn without setting as a reference, passed the test yarn Snarl index, obtained the stability of three types of yarn twist, the yarn tenacity and elongation testing, analysis steaming and microwave steaming yarn yarn on the yarn properties. By steaming yarn, yarn and microwave steaming undetermined form large circular knitting machine yarn machine test, the rate of three kinds of yarn and fabric knitting down the quality evaluation of microwave setting. Experiments show that the steam and microwave setting yarn twist yarn stability was better than undecided students shape yarn, yarn steaming slightly better than the microwave setting yarn.Yarn setting,for the characteristics of microwave heating, use of the water absorption of the yarn itself contains a lot of heat generated by microwave, rapid heat generation, while setting a short time. Amorphous compared to the steaming time of 2 hours or so, just a few minutes of microwave amorphous. The effect of steam yarn setting is a little better than microwave setting. Steam setting, under saturated steam, the yarn is easy to be stains and yellow, the inner and outer yarn penetration problems because of the steam inside and outside the setting uneven. Microwave setting will not have these problems.