JPS566409A - Die for production of ferrite magnet - Google Patents

Die for production of ferrite magnet

Info

Publication number
JPS566409A
JPS566409A JP8102279A JP8102279A JPS566409A JP S566409 A JPS566409 A JP S566409A JP 8102279 A JP8102279 A JP 8102279A JP 8102279 A JP8102279 A JP 8102279A JP S566409 A JPS566409 A JP S566409A
Authority
JP
Japan
Prior art keywords
die
outlet area
magnetic property
extruder
density
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.)
Pending
Application number
JP8102279A
Other languages
Japanese (ja)
Inventor
Kazunori Tawara
Katsunobu Yamamoto
Tokuyuki Noda
Motoharu Shimizu
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.)
Proterial Ltd
Original Assignee
Hitachi Metals 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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP8102279A priority Critical patent/JPS566409A/en
Publication of JPS566409A publication Critical patent/JPS566409A/en
Pending 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Of Metal (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE:To ensure the specified molding density while improving the magnetic property with the proper orientation by specifying the ratio of an outlet area of an extruder to the outlet area of a die. CONSTITUTION:The ratio S0/S between the outlet area S0 of the extruder 7 and the outlet area S of the die 2 used communicated thereto is fixed at 5-150. This can heighten the molding density of the molded body thereby allowing the prevention of cracks which will develop during the drying and the sintering, while elevating the magnetic property beyond that with the static press. When performing the extrusion molding employing this die, an aditive for forming glasslike material is given to the magnetic oxide powder at the rate of about 0.1-2wt%. The addition of the mixing medium is properly fixed at 10-30wt% and the binder at 0.3-3wt%. With such as arrangement, the specified density can be attained thereby preventing possible cracks while magnetic property can be improved with a proper orientation due to the drawing effect.
JP8102279A 1979-06-27 1979-06-27 Die for production of ferrite magnet Pending JPS566409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8102279A JPS566409A (en) 1979-06-27 1979-06-27 Die for production of ferrite magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8102279A JPS566409A (en) 1979-06-27 1979-06-27 Die for production of ferrite magnet

Publications (1)

Publication Number Publication Date
JPS566409A true JPS566409A (en) 1981-01-23

Family

ID=13734848

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8102279A Pending JPS566409A (en) 1979-06-27 1979-06-27 Die for production of ferrite magnet

Country Status (1)

Country Link
JP (1) JPS566409A (en)

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