Method for use in casting technology

US6155331A · kind A · utility

Assignee

• EOS GmbH Electro Optical Systems · DE

Inventors

• Hans J. Langer · Stadthagen, DE
• Christian Wilkening · Beelitz, DE
• Peter Keller · Bruchmühlbach-Miesau, DE
• Florian Wendt · Freiberg, DE

Key dates

• Filing date: May 17, 1996
• Grant date: Dec 5, 2000
• Expiry date: May 17, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/25
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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.