Patent ID: 6155331
Filing Date: 2000-12-05
Classification: B22C,B29C,B33Y,Y02P

Abstract:
A method for manufacturing a three-dimensional lost casting mold including any core for sand casting of a cast part, the method comprising the following steps of:providing the geometry of said cast part as a digital pattern;generating from said digital pattern an inverse pattern for the lost casting mold including any core;providing a layer of a particulate molding material, said molding material comprising a first material and a second material, said first material being chemically inert when irradiated by electromagnetic radiation and said second material being curable by a chemical curing process which is initiated by electromagnetic radiation,scanning said layer by irradiating electromagnetic radiation on places of said layer corresponding to a cross-section of said inverse pattern for the lost casting mold including any core,controlling said irradiation so as to initiate said chemical curing process in said second material, andrepeating said layer providing, scanning and controlling steps for subsequent layers of said molding material such that a subsequent layer is connected to the immediately preceding layer by said irradiation to produce the lost casting mold including any core for subsequently casting said cast part.