In order to meet the requirements of the automated packaging line for small-particle hazardous chemicals for safe,reliable,continuous and efficient production,the working principle,technical parameters and structure model of the device for secondary tying of inner bag mouth were proposed and established by analyzing the shape and relative space position of the mouth of double-ply packaging bag after completion of the first time tying of inner bag of double-ply packaging bag of hazardous chemicals,and further the design scheme of the device for secondary ...
