GB455806A - Process for making permanent magnets - Google Patents
Process for making permanent magnetsInfo
- Publication number
- GB455806A GB455806A GB18598/35A GB1859835A GB455806A GB 455806 A GB455806 A GB 455806A GB 18598/35 A GB18598/35 A GB 18598/35A GB 1859835 A GB1859835 A GB 1859835A GB 455806 A GB455806 A GB 455806A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- nonmagnetic
- powder
- pressing
- plungers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 abstract 4
- 239000000843 powder Substances 0.000 abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 2
- 238000005266 casting Methods 0.000 abstract 2
- 239000000696 magnetic material Substances 0.000 abstract 2
- 239000010959 steel Substances 0.000 abstract 2
- 229910000851 Alloy steel Inorganic materials 0.000 abstract 1
- 239000003302 ferromagnetic material Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 230000005291 magnetic effect Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 238000002791 soaking Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/08—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
- H01F1/083—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together in a bonding agent
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
455,806. Magnets. BAERMANN, M., 30, Deutscher Ring, and DYNAMIT AKT.- GES. VORM. A. NOBEL & CO., Troisdorf Bez, both in Cologne, Germany. June 28, 1935, Nos. 18598 and 18599. Convention dates, July 11, 1934 and Aug. 11, 1934. [Class 35] A permanent magnet is made by reducing ferromagnetic material of high coercive force to powder, mixing or soaking it with a binding medium, forming it into a solid by casting, pressing or other hot or cold treatment and finally magnetizing it. A suitable magnetic material is a nickel-aluminium-steel alloy having a coercive force higher than 240 Oerstedt, and as a binding material, natural or artificial resins or a nonmagnetic metal of low melting point may be used. The magnet may be protected by a sleeve of nonmagnetic material. A magnetic field may be applied during the pressing operation. Polepieces of high permeability material may be built into the magnet and secured thereto by extensions of nonmagnetic material projecting into the magnet. The pressing or casting operation, the heating of the mould and the insertion of the polepieces may be effected in a single operation. The mixture may be introduced into a hollow nonmagnetic body bounded by two steel plungers, one of which is fixed and the other movable and magnetized from an external source through the steel plungers or by means of a winding placed either on the hollow body or on a piece of soft iron bridging the plungers. The magnetic material is formed by reducing larger pieces to powder so that grains of all sizes from 0À01 mm. to 1 mm. are present. If the powder is sufficiently fine and high pressure is employed, a separate binding medium may be dispensed with.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE455806X | 1934-07-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB455806A true GB455806A (en) | 1936-10-28 |
Family
ID=6539088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18598/35A Expired GB455806A (en) | 1934-07-11 | 1935-06-28 | Process for making permanent magnets |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB455806A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2589766A (en) * | 1945-05-04 | 1952-03-18 | Bradley Evelyn | Magnetic oil seal construction |
| EP0125752A2 (en) * | 1983-05-09 | 1984-11-21 | General Motors Corporation | Bonded rare earth-iron magnets |
-
1935
- 1935-06-28 GB GB18598/35A patent/GB455806A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2589766A (en) * | 1945-05-04 | 1952-03-18 | Bradley Evelyn | Magnetic oil seal construction |
| EP0125752A2 (en) * | 1983-05-09 | 1984-11-21 | General Motors Corporation | Bonded rare earth-iron magnets |
| EP0125752A3 (en) * | 1983-05-09 | 1987-01-28 | General Motors Corporation | Bonded rare earth-iron magnets |
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