Patent ID: 7048031
Filing Date: 2006-05-23
Classification: A61C,B22D

Abstract:
1. An apparatus for casting dental prosthesis comprising: a) a ring-placing section, formed like a platform, onto which plural rings are to be placed, each ring having a casting model of a heat-subliming material embedded inside; b) a crucible holder for holding plural cylindrical crucibles in a standing position, each crucible containing a casting material corresponding to each of the plural rings; c) a burning unit having a vertically movable lifting stage onto which each of the rings are to be placed, and a furnace which covers each of the rings placed on the lifting stage when the lifting stage is elevated, and heats each of the rings to form a mold; d) a casting unit having a chamber composed of a container for containing and heating the crucible, and a lid for covering an open top of the container while holding the mold in such a position where a sprue gate of the mold is located above the open top of the crucible contained in the container, and a chamber driver for melting the casting material in the crucible and then rotating the chamber from a normal position to a reversed position to pour the casting material into the mold; and e) a conveyer for conveying each of the rings or the crucible between the ring-placing section, the crucible holder, the burning unit and the casting unit, where the conveyer includes a gripper for holding each of the rings and the crucible, a vertical actuator for vertically moving the gripper, and a horizontal actuator for horizontally moving the gripper.