Temperature Field Simulation And Warping Deformation Control Of Variable Mold Temperature

Variable mold temperature molding technology is based on the forming mold in the filling heating stage of rapid heating,in the late pressure after the rapid cooling injection molding process,under the conditions of ensuring productivity,variable mold temperature injection molding technology,can be a good solution to the plastic products Surface floating fiber,weld marks,the product surface becomes bright.Improve the surface quality of the product,simplify the subsequent secondary processing,optimize the process,save cost,green production,variable mold temperature injection molding,the heating device set and the closed cavity surface temperature uniformity control is still the process Technical difficulties,so this paper,combined with heat transfer,computer simulation,experiment,numerical analysis and other methods were studied.Combined with the characteristics of the mold temperature injection molding process,contact the heat transfer theory,the study of mold temperature injection molding mold and mold temperature heating device between the heat exchange process analysis,between the mold and mold around the environment Of the heat transfer to explore the analysis.Based on the ABAQUE simulation technique,the temperature field and the temperature distribution are analyzed by changing the temperature field of the mold temperature injection molding.The main factors are as follows: the diameter of the heating pipe,the heating pipe spacing,the number of heating pipes,The distance between the tube and the closed cavity,the heating efficiency of the mold and the temperature field uniformity.The temperature field of the closed cavity and the distribution range of the temperature during the injection molding process are analyzed and summarized.The basic law is that the temperature of the central part of the closed cavity is higher than the temperature at other positions,the temperature change rate of the central part is faster than the temperature change of other parts,the temperature on both sides of the closed cavity is lower than the middle,The temperature change rate is slow,summarize and analyze the factors that affect the temperature uniformity of the mold cavity in the mold temperature forming: the distance between the heating pipe and the distance between the heating pipe and theHeating pipe design method,using CAE technology,orthogonal experiment,multi-objective optimization,to automotive rear panel injection mold as an example,the use of these methods,the closed cavity temperature field research,design a reasonable heating tube layout program,The temperature rise rate of the mold cavity of the mold is changed so that the temperature field of the closed cavity becomes more uniform and the accuracy of the result is verified by experiments.In this paper,CAE technique and orthogonal experiment are used to determine the optimum process parameters.The results are analyzed by means of extreme analysis.The results show that the control of the product is more complicated due to the increase of the local mold temperature.The CAE technique is used to analyze the deformation of the cavity under the action of heat and heat,and the deformation results are predicted and the design defects are corrected immediately.The deformation of the cavity is analyzed by CAE technique.Control product quality.