The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 1994
Filed:
Sep. 18, 1992
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
The invention provides a method for manufacturing sintered parts, which uses as a debinder solvent a substance harmless to the human body and which can enhance the strength of an injection-molded product. Sintered parts suitable for use in industrial production processes and, moreover, extremely high in strength of injection-molded parts, can be produced by the steps of: mixing at least one of a sintering inorganic powders of a metal powder, a metal carbide, a carbon-nitride, a nitride powder and a ceramic powder, with an organic binder composed of an organic substance soluble in an alcohol series solvent and an organic substance insoluble in the same; injection-molding the composition obtained by the preceding process into a metal mold of a sintered part shape; immersing the injection-molded product obtained by the preceding step into an alcohol series solvent to elute and remove part of the organic binder; and heating the product to remove the residual organic binder and sintering the same, wherein the portion soluble in the alcohol series solvent of the organic binder accounts for 30 to 70% of the binder.