Patent ID: 6802358
Filing Date: 2004-10-12
Classification: B22C

Abstract:
A method for producing an approximately 80-1000 gram lost mold for titanium casting from a curable embedding compound which contains at least one oxidizing ingredient, the method comprising the steps of:a) preparing a model of an object to be cast from a material which can be melted out of the embedding compound; (b) fastening said model to a casting gate shaper in a muffle ring; (c) mixing the embedding compound with a specified amount of a pasting liquid; (d) coating the embedding compound by pouring over said model in a muffle; (e) subjecting said muffle with said casting gate shaper to an excess pressure; (f) curing the embedding compound for at least 30 minutes and then removing said casting gate shaper; (g) placing said muffle in a cold furnace and heating said furnace to a holding temperature of 850Â° C. at a rate of at least 7Â° C./min.; (h) holding said furnace at said holding temperature until the mold is thoroughly heated; (i) turning off said furnace and cooling an interior of said furnace by opening a door of said furnace for approximately 15 minutes: (j) placing the mold on an edge of an opening of said furnace or on a register of said furnace and allowing the mold to cool for approximately 15 minutes; and (k) placing the mold outside said furnace and allowing it to reach a desired temperature for a casting operation.