Laying metal rubber blank with a pin board was proposed as a preparation technology. An optimization model based on background grids was built. Optimizing methods of dowels and paths planning were established with genetic algorithm according to characteristics of blank laying. Theoretical basis of metal rubber blank laying was provided. Dowel number was obtained according to non-zero grid number of bottom background grids. Dowel configuration was computed with genetic algorithm. Based on the dowel optimization design results

laying paths are devised in each layer. The blank with optimized paths is more homogeneous and denser than that with experiential paths. The advantage of paths planning is more obvious with more laying layers. There is a difference of fifty percent of object function b at ten layers between two kinds of blanks. Layinging quality is little influenced by the number of laying paths in each layer. With increase of helix screw laying length

contact states are coincident in blanks with different numbers of laying paths in each layer.