Finite Element Analysis And Optimal Design For The Lower Platen Of Injection Blow Moulding Machine

The current production of plastic bottles injection equipment is mainly blow molding machine(Referred to as injection blow machine). Clamping mechanism which is a key component injection blow molding machine, the entire machine is the most important part and a larger force. Under the template for structural optimization, can significantly improve the situation by force, to reduce the weight and increase the rationality of the structure, thus improving overall quality and reduce costs. All along, injection blow molding machine templates designed to experience-based, conservative template design, product bulky structure is irrational, the template is easy to break. Generous injection blow molding machine template ratio exceeds 0.2, is a plate. Thick curved issue has been a major problem of mechanics, analytical solutions of the forces of its theoretical value only, and not for the actual design. Therefore, the use of finite element analysis software templates and structure optimization design, and product design has been used directly as a template design trends.FEM is first rod and the whole template analysis using ANSYS modeling comes direct modeling, set up between the lower plate and the lower nut were six pairs of contact between the cylinder and the template, such as lead guide post mounting holes right, after applying the boundary conditions and loads the stress and displacement contours rod template machine model. Cloud seen by stress and displacement, the force of the worst situations template, the amount of deformation is also the largest, verified under the template in the actual work is often the site of fracture. Comprehensive stress and displacement contours that, under Templates higher safety factor, there is greater room for improvement optimization, finite element and therefore the whole rod and template analysis model to optimize the design of the next template provides a basis alone.Finite element analysis results as a basis for the topology optimization under the template, set the amount of material removal is 50%, the convergence of iterations to run 17 times, got the topology map and topology optimization unit under cloud templates, clearly reflect the under template distribution form and position of the ribs, and further provides a reference for optimization under parametric template.Parametric optimization is under the template and the template for the whole rod finite element analysis done and the next template topology optimization work continues, parametric optimization result is the final result of this paper to get. After the establishment of a finite element model template parameter optimization, operation optimization, after 21 iterations to get optimal results. Under the template optimized by reducing the total volume after volume reduction of about 21.7%, reaching the purpose of weight reduction, achieved under article template optimization design goal.Finally modal analysis of lower platen which before and after optimization was carried on. The results show that resonance will not happen between lower platen and fluid cylinder. The dynamic characteristics of lower platen which before and after optimization meet the requirements.