POLYMER BEADS DESIGNED TO BE EXPANDED TO MAKE A FOUNDRY MODEL, MODEL AND EXPENDABLE MODEL METHOD FOR MAKING A METAL PART

摘要

The invention mainly concerns polymer beads designed to be expanded to make a foundry model having a mean diameter less than 0.35 mm. The invention is in particular applicable to the manufacture of metal parts, for example in the automotive field, by an expendable model method wherein an expanded polymer model is used made from such beads.