Moldflow Analysis On Big-sized Injection Molding Parts Of Composite Materials And Their Optimization Of Process Parameters

Over one third of the plastic products are manufactured via the injection moldingtechnology in the world. However, traditional injection moulding technology is graduallyshowing its disadvantages, for example, it not only requires the technicians to have richpractical experience in injection mold, but also costs a lot. Taking the big-sized injectionmolding parts of composite materials as a case, the thesis makes a study on its disadvantages,including high cost&risk of warp&deformation caused by the feature of big size and thinwall during injection mould, which fail to satisfy the customers’ requirement. To solve thisproblem, the thesis tries to conduct a deep research on CAE analysis of injection mold andoptimization of process parameters so as to improve the success rate of trying mould. With thedevelopment of science and technology, the study on the factors and methods that influencethe quality of products has far-reaching significance of technology in the practical production.With architectural templates of big-sized composite materials as research subject, thethesis analyses the base of CAE technology of injection mould at home and abroad, andanalyses the influe nce of the proc ess parameters upo n the quality of the prod ucts during theinjection mould in view of practical prod uction, then takes an analogue simulation of theformation process with aids of CAE software (Mouldflow), and finally makes an optimizinganalysis on process parameters of injection mould in light of Orthogonal Experiment, so as tocontrol the deformation degree of the big-sized injection moulding parts in qualified range.The main content of the studys read as follows.(1) To analyse the influence of process parameters upon the quality of the final products.Owing to the fact that process conditions directly impact on the moulding state of the fondantin the moulding cavity and the quality of the fina l prod ucts, the thesis makes a study on howthe main process parameters of the injection mould influence the quality of the final productsaccording to the construction features and quality requirement of the architectural templatesof big-sized composite material.(2) With the help of CAD software, the thesis gives the architectural templates ofcomposite material a three-dimension modelling, imports Moldflow software to create amodelling and has an analysis in the fields of filling,flowing, warping and cooling, thenachieves the process parameters of the fondant temperature, mould temperature, injection time, dwell timeand cooling time, etc, providing reference for the later optimization.(3) After analysing the orthogonal experiment of the five main parameters, the thesis hasa quadratic optimization on the most important3influential parameters and acheives the bestprocess parameters of the injection moulding parts, which can effectively decrease the degree ofdeformation and shortens the time of trying mould.(4) Designing a practical planning for trying mould, the thesis takes a practical test onthe architectural templates in Hai Tian injection mould with the optimization result and gainsa good effect.Combining the simulation experiment and o rthogonal opt imization method together time,the thesis make s an analysis on the products with CAE technology before putting intoproduction, tries to find o ut some problems and takes measures to solve them, then lowers thedegree of deformation from angle of optimization of process parameters. Finally, it draws thefollowing conclusions: Adoption of the CAE technology and the parameters of orthogona loptimization is efficient to lower the deformation degree of composite-material templates. Thestudy will play an important role in solving some practical problems existing in enterpriseproduction.