Design For Toy Car Steering Plastic Mold And Process Optimization

In the process of injection molding, due to the toy car type of plastic parts of the structure is complicated, engineering and technical personnel are difficult to determine a one-time molding process, it is often need to pass through many times to test, change mould, adjust process parameters can be formally put into production. In this paper, plastic toy car steering gear as the research object, to determine the plastic forming technology and die design process, forecasting products possible defects, to determine the optimal scheme, improve the success rate of a test, shorten the product molding cycle and reduce the production cost. Through the research the main achievements and the work is as follows:(1) Based on Proe software to turn the toy cars steering plastic shell assembly parts 3 d model from top to bottom, through analyzing the characteristics of the plastic molding process, mold cavity configuration, parting surface, pouring system, core process scheme for the size and arrangement of cooling system drawing mold core structure 3 d model, and mold assembly drawing.(2) By adopting the combination of Taguchi experiment and numerical simulation method, simulation analysis was carried out on the injection molding process, melt temperature, mold temperature, injection time, holding pressure and holding time on the quantity and the influence of the volumetric shrinkage, warping and respectively established between warp and volume shrinkage ratio and the parameters of linear mathematical model, and verified experiment. With the aid of the Design-expert statistical software for statistical analysis of orthogonal experiment data obtained buckling quantity and volume shrinkage rate integrated optimum technological parameters combination.(3) Combined with the numerical simulation results of MoldFlow, through the finite element analysis software Ansys Workbench to add temperature load and pressure load coupled thermal-mechanical analysis. By solving for concave and convex mold temperature field distribution and core stress and strain contours, intuitive reflects the stress and strain of each part of the injection mould core, as a mold core parts molding size optimization.