Patent ID: 7722802
Filing Date: 2010-05-25
Classification: B22F,B29C,B29K,B33Y,C22C,Y02P

Abstract:
1. A coated powder material for a two step generative rapid prototyping processes involving a first step of forming a green compact followed by a second step of sintering, the powder material comprising: individual core particles or granules, wherein the individual core particles or granules are respectively coated, the coating containing an activatable adhesive, wherein the coating additionally contains sinterable and/or glass-forming fine-grained spacer material, wherein the activatable adhesive is activatable in the first step of forming the green compact without changing the physical properties of the individual core particle or granule or the fine grained spacer material, wherein the average particle size of the fine-grained material lies below 30% of the particle size of the core particles, and wherein the size and/or composition of the sinterable and/or glass-forming fine-grained spacer material is such that upon sintering the fine grained spacer material sinters earlier than the individual core particles or granules.