GB1524124A - Method for producing a magnetic powder - Google Patents

Method for producing a magnetic powder

Info

Publication number
GB1524124A
GB1524124A GB1329476A GB1329476A GB1524124A GB 1524124 A GB1524124 A GB 1524124A GB 1329476 A GB1329476 A GB 1329476A GB 1329476 A GB1329476 A GB 1329476A GB 1524124 A GB1524124 A GB 1524124A
Authority
GB
United Kingdom
Prior art keywords
moulding
magnetic powder
producing
perforations
april
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
GB1329476A
Other languages
English (en)
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki Co 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 Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Publication of GB1524124A publication Critical patent/GB1524124A/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
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/024—Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Powder Metallurgy (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
GB1329476A 1975-04-04 1976-04-01 Method for producing a magnetic powder Expired GB1524124A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4025075A JPS51115817A (en) 1975-04-04 1975-04-04 Magnet plate for electro-acoustic transducing and the method of its ma nufacture

Publications (1)

Publication Number Publication Date
GB1524124A true GB1524124A (en) 1978-09-06

Family

ID=12575442

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1329476A Expired GB1524124A (en) 1975-04-04 1976-04-01 Method for producing a magnetic powder

Country Status (3)

Country Link
JP (1) JPS51115817A (US06534493-20030318-C00166.png)
CA (1) CA1090086A (US06534493-20030318-C00166.png)
GB (1) GB1524124A (US06534493-20030318-C00166.png)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5352396A (en) * 1989-08-31 1994-10-04 Zaragueta Juan J L Method of fabricating ceramic tile
US5932498A (en) * 1996-07-12 1999-08-03 International Business Machines Corporation Magnet and method for manufacturing a magnet

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54145958A (en) * 1978-05-09 1979-11-14 Yokohama Kagaku Kinzoku Kk Method of producing porous magnet and mold used for executing same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5352396A (en) * 1989-08-31 1994-10-04 Zaragueta Juan J L Method of fabricating ceramic tile
US5932498A (en) * 1996-07-12 1999-08-03 International Business Machines Corporation Magnet and method for manufacturing a magnet

Also Published As

Publication number Publication date
JPS51115817A (en) 1976-10-12
JPS5442609B2 (US06534493-20030318-C00166.png) 1979-12-15
CA1090086A (en) 1980-11-25

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Legal Events

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