SIMION HARAGAS, LUCIAN TUDOSE, DANIELA JUCAN, ANDREI SZUDER MULTI-OBJECTIVE OPTIMIZATION OF THE PNEUMATIC EJECTORS FOR PLASTICS THIN-WALL INJECTED PARTS In this paper a modern multi-objective optimization of the pneumatic ejectors of the plastic injection mold is presented. For this Pareto multi-objective optimization, two objective functions (volume and efficiency of the ejector) and four genes were taken into consideration and a set of twelve constraints were formulated. In solving the optimization problem we used an original two-phase evolutionary algorithm (2PhEA) inspired from the concept of “punctuated equilibrium”. 2PhEA is implemented in Cambrian v.3.2 which is in operation at the Optimal Design Centre of the Technical University of Cluj-Napoca, Romania. The study on the individuals along the obtained Pareto front reveals some important conclusions useful in the design of the pneumatic ejectors.
Keywords: optimal design, evolutionary algorithms, pneumatic ejector, injected part