Patent ID: 6170560
Filing Date: 2001-01-09
Classification: B29C,B33Y,E04B

Abstract:
A method of producing a shell mold for preparation of a three-dimensional truss structure comprising the following steps:providing an integrally formed three-dimensional truss structure made from a medium capable of solidification and forming said three-dimensional truss structure wherein said structure contains outer top and bottom plane surfaces thereof comprising interconnected rod segments, said rod segments integrally formed at their points of intersection on said outer top and bottom surfaces, said top and bottom surfaces integrally joined together through additional interconnected rod segments passing through an integrally formed intersection, wherein said additional interconnected rod segments passing through said integrally formed intersection form a three-dimensional continuous array of trianglesforming a shell-mold by placing said three-dimensional truss structure into a coating formulation to coat said three-dimensional truss structure to form a shell thereon, followed by removal of said solid three-dimensional type structure.