Design On Double-Layer Packing Box For Powder Hazardous Chemical Packaging

At present,the packaging form of some powdery hazardous chemicals with high energy and fast explosive speed is still in the state of manual packaging or semi-automatic packaging,which has high labor cost,low packaging efficiency and serious safety risks.The existing domestic packaging equipment is difficult to meet the market demand for powdery hazardous chemicals packaging.In order to prevent moisture absorption and prolong the shelf life of powdery hazardous chemicals,double-layer(or multi-layer)packaging bags with good barrier are often used to wrap them,and the packaging bags need to be manually prefabricated and then put into the packing box.This work is time-consuming and labor-intensive,which affects the production efficiency of the powdery hazardous chemicals packaging line.At present,the research on the technology of double-layer packaging bag is still in the primary stage in China.Therefore,after the research on the technology of automatic packaging production of powder hazardous chemicals with high energy,the key module of automatic packaging production line-double-layer packaging bag and carton device is optimized.The main contents of this paper include:Firstly,conceptual design method is used to analyze the functional requirements of the process of packing bag and box,and the box and box function is divided into four sub-functional modules:bag feeding,bag opening and bag moving,box feeding and bag opening.The sub-functions are analyzed from the aspects of behavior,structure and constraints,and the alternative scheme meeting the basic requirements is obtained.Secondly,the Analytic Network Process(ANP)was used to establish an evaluation index system based on the BOCR principle.The alternative schemes were evaluated according to the evaluation factors,and the optimal schemes meeting the requirements were obtained.Then,the Solidworks software is used to establish the overall three-dimensional model of the double-layer packaging box device for powdery hazardous chemicals.The detailed structural design is carried out for the important mechanisms such as the supply bag,the opening of the bag and the moving bag,the supply box and the opening bag.Finally,the key component of the bag opening mechanism was analyzed statically by Workbench module of ANSYS software,and the stiffness and strength of the component were checked according to its deformation and stress distribution under maximum load.Through modal analysis,the natural frequency of the first six orders of the bag-opening plate is obtained,and compared with the excitation frequency generated externally,to ensure that no resonance phenomenon will occur in the normal working process.The double-layer packing box device for powdery hazardous chemicals designed according to the above ideas has good stability and reliability.The actual verification shows that the technical indicators meet the project requirements.