The crank-rocker mechanism is often used to perform folding among the wrapping execute mechanism of packing machinery. Two sets related position of crank and rocker are given in crank-rocker mechanism

one of which is outer extreme location of mechanism. Analysis method is presented to design this kind of mechanism based on the Frendenstein equation. Based on process given to design mechanism by using the Frendenstein equation

the supplementary equation is given by applying extreme condition

dimensionality reduct ion method is adopted

and iteration method is used to solve theequations. The design processis given in detail

the universal design system of mechanism is exploited to realize parametric design and simulation of this mechanism

which uses VB and Pro/ E software. The design and simulation process is verified through an example.