| 摘要 |
PURPOSE:To provide a lost wax casting method which dispenses with using a ceramic core or a water soluble core which is expensive and inferior in productivity, and can make a hollow casting at low cost and with high productivity. CONSTITUTION:A resin mold is formed so that an inside surface shape roughly coincides with a shape of a hollow part. The resin mold is set in a metallic mold having a shape of an external form of a product. By injecting wax between the metallic mold and the resin mold, a wax model formed integrally with the resin mold is formed. By convering this wax model with a refractory material, an unburned casting mold is made. From this unburned casting mold, wax is dewaxed. This unburned casting mold is burned. A molten metal is poured into the burned casting mold. Subsequently, by disjointing the mold, finish is executed. The resin mold can be made by an optical molding method, or a heat melted resin lamination molding method, etc. |
