The CAE Analysis And Optimization Of Injection Moulding And Mold Structure On Armaturenbrett's Bottom Cover

Along with the proportion of plastic which using in automobile industry is become higher and higher,the plasticization and lightweight of automobile has become an important sign of the automobile industry's development.The degree that the traditional mold design and molding process denpend on the technology of technicist is very high.It is difficult to produce high quality molds,and restrict the development of automobile industry.The CAE technology of injection mold can analyze and simulate mould structure and injection molding by finite element model theoretical analysis and computer numerical simulation technology.The CAE technology which can effectively improve mold quality and life expectancy and reduce the production cost and production cycle could promote the development of auto plastic.The research contents which for injection moulding process and mold structure of armaturenbrett's bottom cover are as follows:(1)First of all,the injection molding process of armaturenbrett's bottom cover was simulated by Moldflow for the first time,and analyze the result of the flow,cooling and warp.According to the results of the analysis to determine and optimize unreasonable place of the mold design.(2)The warping of moulding was used for reference,selecting injection molding process parameters and factor levels in a reasonable way,and using orthogonal experiment method to analyze and optimize the influence of various factors on the plastic parts warp.The best parameters combination which can reduce the plastic parts warp was reached.(3)According to the principle of pressure decay time piecewise fitting,the dwell pressure of combination was optimized,and make the dwell pressure close to the pressure curves of injection molding machine.The dwell pressure that was optimized can reduce the defects of injection molding,such as warping deformation,welding mark.(4)Using the Transient thermal of ANSYS Workbench to analyze the distribution of temperature field when the cavity was worked to inject.The result of Transient thermal,together with the clamping force and injection pressure to analyze the stress-strain's condition of the mold by thermal-structure coupling analysis.According to fatigue damage accumulation theory,the mold cavity was analyzed by the fatigue tool topredict the fatigue life of mold cavity.(5)According to the phenomenon of stress concentration and prone to fatigue in the mold cavity,the Design Xplorer of ANSYS Workbench was used to optimize the mold cavity.This optimization can prolong the the service life of the cavity,and reduce the failure rate and maintenance cost of mould.Through a serious of calculation for the injection molding and mold cavity,it will get relevant data,and provides the structural improvements and theories of optimizing improvements about the structure for theinjection moulding processt and the mold structure.