CAE Analysis And Structure Optimization Design Of POS Shell Injection Mold

With the continuous development and application of plastic daily products and engineering plastics parts,the demand for plastic products is increasing.From the coverage rate of POS terminals,the number of POS machines per capita in China is far lower than that in other countries,and the market space is vast.Data show that China has 13.7 POS machines per million people,the number in the United States jumped to 179 units,while South Korea is as high as 625 units.The per capita coverage rate of POS in China is less than 1/8 in developed countries.The twenty-first Century is an era of information,the POS machine market will inevitably be a great market.Considering the appearance of a POS shell products related factors and product price,economic strength,die life,using UG8.5 and ASM2014 software,a new design method is proposed for molding the products,through the simulation analysis and experiment combined mold design to optimize the POS cabinet.Firstly,the 3D entity of POS shell is created by UG8.5,and the gate location,filling,cooling time and weld mark of POS shell forming die are optimized by ASM2014.Secondly,specify the POS shell weld line as the optimization goal,set the gating system(using needle hot runner)and cooling system as the constraint condition,optimization variables are defined: injection time,injection speed,injection molding process parameters of pressure,cooling time and melt temperature,evaluated and optimized by orthogonal experiment method,and determine the optimal solutions.Then,the structure design of the POS shell forming die is carried out by using UG8.5.The contents include: parting,adjusting mould frame,gating system(adopting needle valve hot runner),cooling system,pushing out system,slide block,inclined roof and standard parts.Finally,use the corresponding types of injection molding machines,injection molding parameters obtained by optimization of production,check the shell surface of weld line,deformation and so on,then get the conclusion: with CAE analysis and the use of hot runner mold valve,injection molding product surface weld line is almost invisible,deformation is controlled in the tolerance range,POS and other plastic machine can be smoothly installed.The research makes the enterprise replace the traditional test mode with systematic technology,and eliminates the waste caused by the instability of the production conditions,reduces the production cost,and improves the competitiveness of the enterprise in the market.