GB1531317A - Method for the manufacture of permanent magnets - Google Patents

Method for the manufacture of permanent magnets

Info

Publication number
GB1531317A
GB1531317A GB3067276A GB3067276A GB1531317A GB 1531317 A GB1531317 A GB 1531317A GB 3067276 A GB3067276 A GB 3067276A GB 3067276 A GB3067276 A GB 3067276A GB 1531317 A GB1531317 A GB 1531317A
Authority
GB
United Kingdom
Prior art keywords
die
mould
magnetization
mixture
binding
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
Application number
GB3067276A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BBC Brown Boveri AG Switzerland, BBC Brown Boveri France SA filed Critical BBC Brown Boveri AG Switzerland
Publication of GB1531317A publication Critical patent/GB1531317A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0266—Moulding; Pressing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Powder Metallurgy (AREA)

Abstract

1531317 Permanent magnets; magnetization BBC BROWN BOVERI & CO Ltd 22 July 1976 [24 July 1975] 30672/76 Heading H1P A permanent magnet is manufactured from a mixture of a powdered magnetizable substance of high magnetic crystal anisotropy with a binding medium and charging the mixture into a press comprising a mould cylinder 2 and pneumatically operated dies 1, 3. Die 1 is constructed as an ultrasonic resonator excited from generator 6 and the cylinder 2 is surrounded by magnetizing coil 7. The mixture is precompressed by die 1 with magnetization and the resultant tablet is raised to the upper edge of the mould by die 3; after which it is compressed under die 1 with application of magnetization and of ultrasonic vibrations to produce local heating by absorption of oscillatory energy. After cooling the magnet is removed from the mould by actuating die 3. The magnetizable substance may be a cobalt rare earth or alnico alloy, and the binding medium may be thermoplastic or thermosetting. In the case of the former the mould is held below the softening temperature and in the case of the latter it is held above the setting temperature. The medium may be, e.g., polyphenyl sulphide, polyamide, polyethylene, polyester or low melting point metals e.g. tin or Wood metal. The magnetic powder may be tin-coated to assist in binding.
GB3067276A 1975-07-24 1976-07-22 Method for the manufacture of permanent magnets Expired GB1531317A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH966075A CH586954A5 (en) 1975-07-24 1975-07-24

Publications (1)

Publication Number Publication Date
GB1531317A true GB1531317A (en) 1978-11-08

Family

ID=4354314

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3067276A Expired GB1531317A (en) 1975-07-24 1976-07-22 Method for the manufacture of permanent magnets

Country Status (6)

Country Link
JP (1) JPS5214898A (en)
CA (1) CA1075567A (en)
CH (1) CH586954A5 (en)
DE (1) DE2535745A1 (en)
FR (1) FR2319185A1 (en)
GB (1) GB1531317A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128849A (en) * 1982-10-14 1984-05-02 Bestobell Transducer element
US4562019A (en) * 1979-02-23 1985-12-31 Inoue-Japax Research Incorporated Method of preparing plastomeric magnetic objects
EP0234476A1 (en) * 1986-02-17 1987-09-02 MITSUI TOATSU CHEMICALS, Inc. Permanent magnet and process for producing the same

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS568750Y2 (en) * 1978-11-07 1981-02-25
JPS6033285B2 (en) * 1979-12-20 1985-08-02 住友ベークライト株式会社 plastic magnet composition
US6007757A (en) * 1996-01-22 1999-12-28 Aichi Steel Works, Ltd. Method of producing an anisotropic bonded magnet
DE102008019959A1 (en) * 2008-04-21 2009-10-22 Blue Object Ohg Magnetic surface, for the display of paper notices and the like, is of woven wire tensed between upper holder and lower weighted rod
CN105623240A (en) * 2015-12-17 2016-06-01 上海交通大学 Anisotropic high-molecular permanent magnetic compound material and preparation method therefor
DE102016205243A1 (en) 2016-03-30 2017-10-05 Thyssenkrupp Ag Apparatus and method for processing a sample material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849213A (en) * 1966-09-01 1974-11-19 M Baermann Method of producing a molded anisotropic permanent magnet
DE2258780A1 (en) * 1971-12-14 1973-06-28 Goldschmidt Ag Th PROCESS FOR PRODUCING PERMANENT MAGNETS BASED ON COBALT-RARE EARTH ALLOYS

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4562019A (en) * 1979-02-23 1985-12-31 Inoue-Japax Research Incorporated Method of preparing plastomeric magnetic objects
GB2128849A (en) * 1982-10-14 1984-05-02 Bestobell Transducer element
EP0234476A1 (en) * 1986-02-17 1987-09-02 MITSUI TOATSU CHEMICALS, Inc. Permanent magnet and process for producing the same
US4810572A (en) * 1986-02-17 1989-03-07 Mitsui Toatsu Chemicals, Inc. Permanent magnet and process for producing the same

Also Published As

Publication number Publication date
CA1075567A (en) 1980-04-15
JPS5214898A (en) 1977-02-04
CH586954A5 (en) 1977-04-15
FR2319185A1 (en) 1977-02-18
DE2535745A1 (en) 1977-02-10

Similar Documents

Publication Publication Date Title
JPS6427208A (en) Cylindrical permanent magnet, motor using same and manufacture thereof
ES8502738A1 (en) RE-TM-B alloys, method for their production and permanent magnets containing such alloys.
US3849213A (en) Method of producing a molded anisotropic permanent magnet
GB1531317A (en) Method for the manufacture of permanent magnets
GB1447264A (en) Polymer bonded magnets
EP0265016A2 (en) Process of making a permanent magnet
Gould Permanent magnets
JPH08111337A (en) Method and apparatus for forming field of permanent magnet
GB1392915A (en) Method of manufacturing permanent magnets from a cast cobalt samarium alloy
US4056800A (en) Magnetic field aligning means
JPS62224916A (en) Manufacture of rare-earth magnet
JPS61214402A (en) Manufacture of sintered magnet
JPS56125814A (en) Manufacture of cylindrical permanent magnet
JPS55160404A (en) Manufacture of magnetically anisotropic permanent magnet and device thereof
JPS5630708A (en) Material of permanent magnet
Hadfield Permanent Magnets by Powder Metallurgy--Both a History and a Future
JPS644403A (en) Production of magnetic power for resin bonded rare earth-iron permanent alloy
JPS528910A (en) Compression molding method in magnetic field
JPS589805B2 (en) KIDOLI COBALTO
JPH07211567A (en) Method of molding cylindrical radial anisotropic bonded magnet
JPH08130143A (en) Anisotropic bonded magnet and manufacturing method
JPH0785458B2 (en) Rare earth magnet manufacturing method
JPS5668255A (en) Rotor for miniature motor of watch
JPS5645002A (en) Preparation of magnet of rare earth cobalt
JPS54148111A (en) Compression molding of powder

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee