Methodology and apparatus for manufacturing dental appliances

Abstract

The present invention is a methodology and apparatus for investment casting and injection molding of dentures. The apparatus utilizes a dental flask placed in a press held in position by a turn screw. An injector, comprised of a piston inserted into a dual open ended cylinder containing dental appliance materiel, is connected to the dental flask. A hydraulic jack presses the piston further into the cylinder to inject the dental appliance material into dental flask. To prevent contaminating contact of the dental appliance with the cylinder, the dental material is inserted first into an open ended bag that partially placed in a wire loop passing through the cylinder. As the wire loop is withdrawn from the cylinder, the open end bag is drawn into and properly oriented within the cylinder so that the open end of the bag meets the injection aperture of the dental flask.

Dependencies are inferred from the claim text.