The CAE Analysis And Optimal Design Of Injection Mold On Auto Parts

Automotive plastics have become an important symbol of the development in automobile industry along with the widely used of plastic in the automobile industry. While the traditional plastic injection molding process and mold design mostly depend on the experience of the design personnel which restricted the development of the car industry increasingly, CAE technology which conduct simulation analysis by computer on the injection molding process solve the problem effectively. So that the success rate of mode testing can be raised, the production cycle and coast can be lowed, and the benefit of industries can be high.In this paper, we used Moldflow software to simulate the process design of injection molding auto dashboards through research the application status of the plastics in the automotive industry and combined with CAE technology in the application of the injection molding, then improve the preliminary design based on the analysis results and draw the following results:(1)Used Moldflow injection mold software to simulate the preliminary gate location to find the best gate location, and Used current analysis to gate location and quantity for optimization analysis. Ultimately balance filling was obtained when the mold part had two pouring gate.(2) Calculated the mainstream gating system the diameter of3.5mm, diversion way for4mm, some gate diameter of0.8mm according to the polymer rheology theoretical basis, found that welding mark is the greatest weakness by analyzing flow of the preliminary design for pouring system, the length of the weld lines and number significantly reduced, and volume contraction improved0.03%through the point gate improved to the dormant gate compared to the results of that was not improved.(3) Cooling pipe diameter and the number were calculated for10mm, for3mm respectively in the cooling system combined with Heat transfer basic theory and used cooling analysis module to simulate and analyze the preliminary design of the cooling system combined with features of pipeline layout structure parts, reasonable optimization design on the cooling system was analyzed, cooling time was reduced from13.34s to12.90s after the optimization plastic parts improved and cooling efficiency has increased by3.3%. made the time of the open mold from4.279s to4.150s, reduced the open mode time, shorten the cooling cycle.(4) Simulation analysis was carried out after molding of the glove compartment of the warping, through the warping analysis module, results were found that uneven contraction caused the warping deformation, total amount of the warping deformation change from0.4926mm before optimization to0.418mm by changing the pressure curve and reduced by15.1%. the warping deformation amount of the formed products was reduced greatly.