Automatic stockings conveying equipment based on pneumatic transferring technology

FANG Li-xiang1, CHEN Ying-hao2, REN Kun1, WU Xin-jie1, REN Jie-di1
(1.Faculty of Mechanical Engineering & Automation, Zhejiang Sci-Tech University,
Hangzhou 310018, China; 2.Zhejiang Willing International Co., Ltd., Jiaxing 314500, China)

Abstract: Aiming at the problems of low degree of automation of stockings transportation in real production, a new conveying method of stockings was studied,which was based on the theory of pneumatic conveying. Transport model of transfer pipe was established based on the formula of fan power with considering the weight of stockings, air flow rates, the pressures of air and the area and the length of pipe. The experiments were designed for analyzing the relation between the speed of stockings and the length of pipe, the pressures of air and the length of pipe to optimize the models. An automatic transferring technology was proposed which was based on FX series PLC and OMRON 3G3MV series inverter. An experimental prototype was made and the models were applied in production. The technology was tested by comparing the operation time of the machine with the operation time of workers. The results indicate that this technology reduces the time spent on transferring of stockings. The function of automatic reversing of stockings is realize and the function of automatic scrapping of defective products is realize. The production efficiency has been raised.
Key words: pneumatic conveying; silk stockings; theoretical model; experimental prototype