Extrusion blow molding is an efficient way to produce hollow parts with complex geometry. In this paper a jounce bumper geometry is investigated and numerical simulations are compared with experimental data. In addition a parametrical study is performed to visualize the influence of the processing conditions on the resulting wall thickness distribution. An analytical procedure is derived to correct overestimation of stretching during inflation. This is caused by the membrane approximation approach that is implemented in the simulation software. Accuracy of the simulation results is within the variation of the measurements for thin areas and shows 5 % up to 15 % underestimation in thick areas. Furthermore, a parameter study is employed to correlate initial parison geometry with final wall thickness distribution. Thus the choice for suitable processing conditions in terms of initial parison geometry aiming for a certain wall thickness distribution is accelerated.
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