| The design of multi-cavity can reduce the number of injection equipment,reduce costs and improve producion efficiency.In this paper, we firstly design the product structure on different numbers cavities PET bottle injection molds,determine the reasonable PET materials processing,and design rheological balance of unnatural balanced hot runner system.And then we use ANSYS to simulate the hot runner temperature field, including its single board heating, injection molding processing temperature; Test the temperature and thermal expansion of runner plate, advance the effective way to make hot runners analysis.In addition,we use professional mold flow software Moldflow to analysis the filling, flow, packing and cooling conditions of non-equilibrium multi-cavity (such as 12,28,32, etc.),and forecasts the defects on design.Design a reasonable option (reference numerical simulation results), to test mold test according to the analysis.At last,through the CAE analysis on multi-cavity hot runner PET bottles injection mold, we get these following conclusions:(1) Designed semi-circular, parabolic preform and cone preform products, through the MPI analysis we obtained Parabolic preform design is most reasonable and materials saving in the PET preform lightweight design;(2) Unbalance gating system is feasible in multi-cavity injection mold, balance design can be done by flow balance method or the gate balance method;(3) Heat loss influence the stability of the process in hot runner injection mold, and hot runner system can achieve thermal equilibrium by analyzing the temperature field, calculating heating power,optimizat optimally arranging heat pipe and heating power, thermocouple(4) Forecasting product defects which may appear is a focus of Injection Molding CAE applications.Analysising the injection molding situactions of filling, flow, packing and cooling,improving the injection molding process, making better the cooling effect, can improve the success rate of test mode.
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