Finite Element Analysis And Topology Optimization Design For Platens Of Injection Molding Machine

Platens are key components of injection molding machine clamping device. The frontplaten and the dynamic platen bear bending stress in mode-locking process, and because oftheir large deformation, the plastic molding quality is impacted. For a long time, it isapproximate calculated for the injection molding machine platens, mainly used the bendingcalculation theory of ordinary beam. Designs of platens in existence, based on experience, arealmost designed with analogy method consulted the size and shape of the same type of otherplatens. Platens with this design method can not maximum embody the strength of thematerial. Its expression of mechanical path is not clear either. The results will inevitablyreduce the clamping device of the utility value, even impact the grasp of product precision.This will bring on great adverse effects of mass production of injection molding machine.Topology optimization design of injection molding machine, can realize the optimaldistribution of material to the greatest extent. It is of positive significance.The main research work are as follows：1. Using UG NX8.0, it conducted the3D digital model of EM150-V injection moldingmachine， performed motion simulation of the clamping mechanism, and verified thecorrectness of the model parameters. Using finite element analysis function in UG NX8.0“Advanced Simulation” module, the injection molding machine dynamic platens and frontplatens were analyzed by finite element analysis, and the stress distribution and deformationof the platens were determined.2. Using topology optimization function in UG NX8.0“Advanced Simulation” module,the injection molding machine platens were topology optimization designed. The before andafter the optimization of the structure were compared. The maximum deformation of theoptimized dynamic platen is decreased by20.4%, the volume is decreased by6.8%, theaverage displacement of all the nodes in the mold mounting plane is decreased by12.7%andthe maximum stress is only increased by0.8%. The maximum deformation of the optimizedfront platen is decreased by6.2%, the volume is decreased by6%, the maximum stress isdecreased by6.6%and the average displacement of all the nodes in the mold mounting planeis decreased by9.1%.The effect of optimization is obvious. 3. All of the modeling of the injection molding machine, mold assembly of the clampingdevice, motion simulation, finite element analysis and topological optimization design of theplatens were carried out in NX8.0. This ensures the unity of data and improves the editabilityof model, reduces the design cost and improves the efficiency of design.