Method for producing soft magnetic powdered core
US8029626B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 17, 2008 |
| Grant date | Oct 4, 2011 |
| Priority date | — |
| Expiry date | Jan 10, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for producing a soft magnetic powdered core comprises a mixing step for forming a raw powder by adding a thermoplastic resin powder to a soft magnetic powder and mixing them, a compacting step for forming a compact by compacting the raw powder into a predetermined shape, a melting and setting step for the resin in which the resin of the compact is melted by heating to at least the melting point of the thermoplastic resin and the melted resin is set by cooling to a room temperature, and a crystallizing step for the resin in which the set resin is heated to not less than the exothermic onset temperature and not more than the endothermic onset temperature, which are measured by DSC analysis of the thermoplastic resin, and is cooled to a room temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.