| 摘要 |
PURPOSE:To shorten dewaxing time in dewaxing an injection molded or extrusion molded article comprising metallic or ceramic powder and an organic polymer binder with an organic solvent and sintering, by using a combination of a component soluble in an organic solvent and a component insoluble in the organic solvent as the binder. CONSTITUTION:Metallic or ceramic powder is blended with a binder consisting essentially of an organic polymer, kneaded and pelletized to give a mixture, which is injection molded or extrusion molded to give a molded article of desired shape. In the operation, the organic polymer contained as the binder is a combination of one or more of a solution soluble in a certain organic solvent and a component insoluble in the organic solvent. Only the soluble binder component is extracted by a method such as immersing the molded article in a certain organic solvent and the molded article is sintered to give a sintered product. By this method, the molded article can be dewaxed in a shorter time than by heating dewaxing method and the shape of the molded article will not be damaged because the polymer insoluble in an organic solvent is left. |
