Optimization Design For Instructure Parameters Of Toggle Clamping Unit Of Injection Molding Machine

Injection molding is one of the main methods for polymer processing. Whatever they are medium-scale, small-scale or large-scale injection molding machines, all of machines require larger ratio of stroke and the force amplification, which would not only obtain mould maximum board average velocity but also low the energy consumptions. Ways of optimization design completely change previous designing ways which rely on experience, analysis and approximate calculating, emancipate designers from the hard work and lay a foundation on CAD of injection molding machine.In this article, an analysis of motional and mechanical characteristics for optimization design for oblique five hinge joint-double toggle clamping unit of injection molding machine is made by structure method, systematically making establishment of motional and mechanical model which includes the mold board stroke, the oil cylinder stroke, ratio of stroke, the speed variation coefficient, the force amplification, the force of clamping, the critical angle, the systematical stiffness, the pushing force of closure oil cylinder and else. Based on above, overall and systematical optimization to clamping unit of which the force of clamping is 2000kN has been produced.During the optimization design of toggle clamping unit, amplification on clamping force and stroke ratio are regarded as the objective function in all multiple objective functions, other objectives functions are convert into constraint conditions. Optimized toggle clamping unit by adopting penalty function method to optimize, using Turbo C and Visual C++ to optimize program. Save your time and energy. Compared with before optimization, outcomes of optimization increase 10.1% in the stroke ratio and 8.9% in the force amplification. From optimization results we can get it is obvious that motional and mechanical characteristics has been improved accompanied with ratio of stroke and the force amplification .So we will gain the highest efficiency at a cost of low energy consumptions.From the calculating formula, we adopted VS2003 software to work out interactive program, which can greatly decrease working capacity of project planner. Finally, I used UG software to modeling, and mapping out three-dimensional graph of major parts. This work could provide intuitive reference to designers of clamping unit.The completions of this paper provided better theoretical models and optimize methods for optimization design of Oblique Five-Hinge Joint-Double Toggle Clamping Unit of Injection Molding Machine.