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. 24, 2023
Filed:
Aug. 10, 2018
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sumitomo Electric Sintered Alloy, Ltd., Takahashi, JP;
Tatsuya Saito, Osaka, JP;
Asako Watanabe, Osaka, JP;
Tomoyuki Ueno, Osaka, JP;
Hijiri Tsuruta, Takahashi, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
SUMITOMO ELECTRIC SINTERED ALLOY, LTD., Takahashi, JP;
Abstract
A method for manufacturing a dust core, including: a step of preparing a raw material powder including a coated pure iron powder composed of a plurality of pure iron particles each having an insulating coating layer, a coated iron alloy powder composed of a plurality of iron alloy particles each having an insulating coating layer, and a metal soap; a step of manufacturing a molded article by performing a compression molding of the raw material powder filled in a mold; and a step of performing a heat treatment of the molded article to eliminate distortions in the coated pure iron powder and the coated iron alloy powder, wherein a difference Tm−Td between a melting point Tm of the metal soap and a temperature Td of the mold in the step of manufacturing the molded article is greater than or equal to 90° C.