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:
Feb. 25, 1992
Filed:
Jul. 19, 1990
Applicant:
Inventors:
Masakazu Achikita, Kashiwa, JP;
Akihito Ohtsuka, Sakura, JP;
Assignee:
Sumitomo Metal Mining Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
148104 ; 419 10 ; 419 23 ; 419 25 ; 419 36 ; 419 37 ; 419 39 ;
Abstract
There is disclosed a method for manufacturing intricate shaped magnetic parts having excellent soft magnetic characteristics which includes forming powders of Fe and P having particle sizes less than 45 .mu.m; mixing 0.1 to 1.0% by weight P powder with Fe powder; adding a binder; injection-molding the mixture at 1200 kg/cm.sup.2 ; removing the binder by heating; sintering the binder free part at 1200.degree.-1400.degree. C. for 30-180 min; and cooling the sintered part at a rate of less than 50.degree. C./min.