초록 ▼

The geometry of the cast part is provided as a digital pattern and an inverse pattern for the lost casting mold including any core is generated from the digital pattern. A layer of a particulate molding material is provided. The molding material is made of a first material and a second material. The

The geometry of the cast part is provided as a digital pattern and an inverse pattern for the lost casting mold including any core is generated from the digital pattern. A layer of a particulate molding material is provided. The molding material is made of a first material and a second material. The first material is chemically inert when irradiated by electromagnetic radiation. The second material is curable by a chemical curing process that is initiated by electromagnetic radiation. The layer is scanned by irradiating electromagnetic radiation on places of the layer corresponding to the inverse pattern for the lost casting mold including any core. The irradiation is controlled to initiate the chemical curing process in the second material. The layer providing, scanning and controlling steps are repeated for subsequent layers of the molding material to connect each layer to the immediately preceding layer by the irradiation to produce the lost casting mold including any core for subsequently casting the desired cast part.

대표청구항 ▼

[ We claim:] [1.] 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 fo

[ We claim:] [1.] 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.