Invention Grant
- Patent Title: Method of manufacturing permanent magnets
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Application No.: US16089716Application Date: 2017-03-30
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Publication No.: US11842832B2Publication Date: 2023-12-12
- Inventor: Rainer Meinke
- Applicant: Advanced Magnet Lab, Inc.
- Applicant Address: US FL Palm Bay
- Assignee: Advanced Magnet Lab, Inc.
- Current Assignee: Advanced Magnet Lab, Inc.
- Current Assignee Address: US FL Palm Bay
- Agency: LOWNDES
- Agent Stephen C. Thomas; Richard Fredeking
- International Application: PCT/US2017/025212 2017.03.30
- International Announcement: WO2017/173186A 2017.10.05
- Date entered country: 2018-09-28
- Main IPC: H01F41/02
- IPC: H01F41/02 ; H01F1/057 ; C22C1/02 ; B22F9/04 ; B22F3/24 ; B22F3/12 ; B22F3/17 ; B22F3/16 ; B22F5/12 ; H01F13/00 ; H01F7/02 ; B22F9/06

Abstract:
A continuous method of manufacturing permanent magnets and the permanent magnets created thereby. A fine powder is created from a combination of magnetic metals. The powder (a metal alloy) is placed in a non-magnetic container of any desired shape which could be, for example, a tube. The metal alloy and tube are swaged while a magnetic field is applied. Once swaging is complete, the metal alloy and tube are sintered and then cooled. Instead of sintering, a bonding agent can mixed into the powder. Following cooling, the metal alloy is magnetized by placing it between poles of powerful electromagnets with the desired field direction. The process of the invention enables mass-produced, cost-effective PM products, which are more robust, easily assembled into products, enables new “wire like” shapes with arbitrary magnetization direction. The process enables mass production of permanent magnets of any desired cross section, produces permanent magnets continuously that may be cut to any length, and may, in an embodiment, result in directional magnets.
Public/Granted literature
- US20190122818A1 METHOD OF MANUFACTURING PERMANENT MAGNETS Public/Granted day:2019-04-25
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