Analysis And Optimization Of Contrary Angle Clamping Unit For Injection Molding Machine

Clamping unit, the important components of injection molding machine, is the main targets of energy and material consumption. Therefore, the design level of clamping unit largely determines the product's competitiveness in the market. With the transformation of market direction and the green energy-saving injection molding machine into the mainstream, the domestic industry in this research has yielded some results, but still seem relatively short. Meanwhile, in order to implement the ideas "adhering to energy-saving priority, reduce energy consumption" in the national long-term scientific and technological development plan outline, as well as relevant policies of digestion, absorption and re-innovation of the imported technology. This paper focuses on elbow rod actuator and platen of clamping unit of injection molding machine and discusses the method and application of the optimization of its energy supplies and the reduction of the cost.The first part is mainly about the geometry and motion analysis of the contrary angle type of elbow rod actuator, using MATLAB to calculate and program size optimization and design graphical user interface, providing a convenient and practical design program of elbow rod actuator for industry designers. This part also uses Pro/ENGINEER to build the assembly model of clamping unit of injection molding machines, and motion analysis was carried out, to compare with the motion and mechanical characteristic of two types of structures, which provides a basis for performance analysis of selection on elbow rod closing actuator for industry designers.The second part is mainly about the structure optimization for the major steel consuming objects in injection molding machine:the front platen, dynamic platen and back platen, to reduce production costs by reducing the consumption of steel, including the static stress analysis, topology optimization, and fatigue and reliability analysis for the platens, and discusses the theory and method above. Through the above analysis and optimization, platen steel consumption reduces nearly 10%, while ensuring the strength, stiffness and fatigue performance of working platens, which provides a reliable basis of structural design of platens in injection molding machine for industry designers.