The Structural Analysis Of Injection Mould’s Typical Mould Frame

With the continuous development of China’s automobile industry, the quantity ofpossessed motor vehicles increased rapidly, causing the increasing demand for automotiveinjection moulds. However, most of mould manufacturers in the domestic still mainly rely onpast experience to design, manufacture molds, by the number of testing mold, repairing mode,then get the qualified products, often the design manufacturing process costs a long time andspends most of money. In order to solve the problem, our research team will analyze theinjection mould in its full life cycle period by finite element method with ZhongXinZhiMoCo., Ltd. In design stage,through the strength, stiffness and the thermal-structural couplinganalysis of the injection mould, we will analyze the common failure modes of the keycomponents, and provide ways to solve practical problems. The main content of this paper isto analyze the structural analysis of injection mould’s typical mould frame, and to providetheory evidence to design the mould frame for the company.Firstly, the parametric modeling of mould frame is established with the ANSYSParametric Design Language, the deformation of the different size of mould frame in the sameinjection pressure is analyzed. Through the orthogonal experimental design program, thesensitivity analysis of the parameters which affects the deformation of the mould frame iscompleted, and the main factors that affect the deformation is determined. Then, we willcalculate the deformation of move plate of the mould frame with the theory of elasticmechanics, and the formula is found, then the error analysis between the numerical solutionand analytical solution is completed. Secondly, the concept of light-weight design for themold frame is brought forward, we will determine the best size of mould frame which meetsthe strength and stiffness requirements,so the materials used is reduced. Again, the affect ofthe support pillar’s position, manufacturing errors, and the total area to the stiffness of themould frame is analyzed. Then, the range of the support pillar location is preliminarilydetermined by the topology optimization design method, and then we will analyze thelocation of support pillar in the several common arrangement method, we get the bestarrangement and the best location of the support pillar in this method. Through the analysis ofdeformation of the support pillar in the different manufacturing error, we get the best value of the error, and then its area under the manufacturing errors impact on the deformation of themold is analyzed. Finally, based on the interfacing between Visual C++and ANSYS, wedevelop a universal finite element analysis system of the mould frame. Inputting theparameters in the interface, the program can model、solve automatically, and the results can beviewed directly in the program, saving a lot of work time and increasing the efficiency ofmold analysis and calculation.