GB1506053A - Apparatus and method for forming permanent magnets by moulding - Google Patents

Apparatus and method for forming permanent magnets by moulding

Info

Publication number
GB1506053A
GB1506053A GB2374675A GB2374675A GB1506053A GB 1506053 A GB1506053 A GB 1506053A GB 2374675 A GB2374675 A GB 2374675A GB 2374675 A GB2374675 A GB 2374675A GB 1506053 A GB1506053 A GB 1506053A
Authority
GB
United Kingdom
Prior art keywords
magnetic
moulding
mould
mould plate
cores
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
GB2374675A
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.)
MAGNETIC POLYMERS Ltd
Original Assignee
MAGNETIC POLYMERS Ltd
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 MAGNETIC POLYMERS Ltd filed Critical MAGNETIC POLYMERS Ltd
Priority to GB2374675A priority Critical patent/GB1506053A/en
Priority to FR7615859A priority patent/FR2313755A1/en
Priority to DE19762622796 priority patent/DE2622796A1/en
Priority to JP51061343A priority patent/JPS51144999A/en
Publication of GB1506053A publication Critical patent/GB1506053A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0013—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fillers dispersed in the moulding material, e.g. metal particles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H01F13/003—Methods and devices for magnetising permanent magnets
    • 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
    • H01F41/0273—Imparting anisotropy

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Hard Magnetic Materials (AREA)
  • Powder Metallurgy (AREA)

Abstract

1506053 Moulding magnets MAGNETIC POLYMERS Ltd 7 May 1976 [31 May 1975] 23746/75 Heading B5A [Also in Divisions C3 and H1] Apparatus for moulding a magnet comprises upper and lower magnetic cores between which is a non-magnetic removable mould plate 12; the upper core being vertically movable by an hydraulic ram 14; the surfaces of the cores defining walls of a cavity 15 in which the mould plate is disposed, which is bounded by non- magnetic sidewalls 16 abutting mould cheeks 17 when the mould is closed. The cores are surrounded by coils 10, 11 and contain heater coils 20, 21. Magnetically conducting tiebars 23, 24 connect magnetically conducting end plate 22 to bed 13. The mould plate contains 36 square holes which are charged with a composition of SmCo 5 alloy powder with a thermosetting polyester resin binder. Ram pressure is applied while the apparatus is heated, while a magnetic field is applied to the composition by energizing coils 18, 19 to align the magnetic particle remains. A modified mould plate (Fig. 2, not shown) enables injection or transfer moulding to be employed to form the magnets, and other cobalt rare earth alloy powders e.g. Mischmetall Co 5 , PrCo 5 , Sm 2 Co 17 , SmCo 5 , PrSmCo 5 may be used. Also strontium ferrite, AlNiCoFe alloy, iron oxide, or electrolytic soft iron powders may be used. The binder resin may be a thermoplastic polymer.
GB2374675A 1975-05-31 1975-05-31 Apparatus and method for forming permanent magnets by moulding Expired GB1506053A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB2374675A GB1506053A (en) 1975-05-31 1975-05-31 Apparatus and method for forming permanent magnets by moulding
FR7615859A FR2313755A1 (en) 1975-05-31 1976-05-19 APPARATUS AND METHOD FOR MOLDING MAGNETS FROM MAGNETIC PARTICLES AND A BINDER
DE19762622796 DE2622796A1 (en) 1975-05-31 1976-05-21 METHOD AND DEVICE FOR MANUFACTURING MAGNETS IN THE MOLD
JP51061343A JPS51144999A (en) 1975-05-31 1976-05-28 Apparatus for and method of forming magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2374675A GB1506053A (en) 1975-05-31 1975-05-31 Apparatus and method for forming permanent magnets by moulding

Publications (1)

Publication Number Publication Date
GB1506053A true GB1506053A (en) 1978-04-05

Family

ID=10200644

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2374675A Expired GB1506053A (en) 1975-05-31 1975-05-31 Apparatus and method for forming permanent magnets by moulding

Country Status (4)

Country Link
JP (1) JPS51144999A (en)
DE (1) DE2622796A1 (en)
FR (1) FR2313755A1 (en)
GB (1) GB1506053A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122128A (en) * 1982-06-24 1984-01-11 Electrical Remote Control Co Valve control mechanism
US4562019A (en) * 1979-02-23 1985-12-31 Inoue-Japax Research Incorporated Method of preparing plastomeric magnetic objects

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61112310A (en) * 1984-11-07 1986-05-30 Sumitomo Bakelite Co Ltd Manufacture of permanent magnet
JPH01275113A (en) * 1988-04-28 1989-11-02 Yazaki Corp Manufacturing device for rotary plastic magnet
DE3931628C2 (en) * 1989-09-22 1994-01-20 Steingroever Magnet Physik Electromagnet with adjustable air gap
DE102014106346B4 (en) 2013-05-17 2024-02-01 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) METHOD AND DEVICE FOR INJECTION MOLDING ROTOR MAGNETS

Cited By (2)

* 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
GB2122128A (en) * 1982-06-24 1984-01-11 Electrical Remote Control Co Valve control mechanism

Also Published As

Publication number Publication date
JPS51144999A (en) 1976-12-13
FR2313755B3 (en) 1979-02-16
FR2313755A1 (en) 1976-12-31
DE2622796A1 (en) 1976-12-09

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee
728C Application made for restoration (sect. 28/1977)
728R Application refused (sect. 28/1977)