GB1213606A - A tool for the manufacture of permanent magnets - Google Patents

A tool for the manufacture of permanent magnets

Info

Publication number
GB1213606A
GB1213606A GB1213606DA GB1213606A GB 1213606 A GB1213606 A GB 1213606A GB 1213606D A GB1213606D A GB 1213606DA GB 1213606 A GB1213606 A GB 1213606A
Authority
GB
United Kingdom
Prior art keywords
cavity
hopper
powder
electromagnet
during
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
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.)
Magnetfabrik Bonn GmbH
Original Assignee
Magnetfabrik Bonn GmbH
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
Priority claimed from DE19681608355 external-priority patent/DE1608355C3/en
Application filed by Magnetfabrik Bonn GmbH filed Critical Magnetfabrik Bonn GmbH
Publication of GB1213606A publication Critical patent/GB1213606A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/008—Applying a magnetic field to the material
    • 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
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/58—Processes of forming magnets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/033—Magnet

Abstract

1,213,606. Moulding magnets. MAGNETFABRIK BONN G.m.b.H. 10 March, 1969 [19 March, 1968], No. 12545/69. Heading B5A. [Also in Division H1] A permanent magnet is moulded by feeding magnetic powder from a hopper 9 into a mould cavity 5, producing a magnetic field in the cavity by an electromagnet 6 energized with D.C. and compressing the powder during such energization by a punch 8. The electromagnet is de-energized during lateral movement of the hopper towards the cavity filling position, and an electromagnet 12 at the front of the hopper is supplied with A.C. during such movement to demagnetize that area surrounding the cavity to allow free powder flow. The cavity is formed between a die 2, core 3, and a lower punch 4 which is raised to discharge the moulded magnet which is then moved laterally by the front of the hopper. The powder may include a binding agent.
GB1213606D 1968-03-19 1969-03-10 A tool for the manufacture of permanent magnets Expired GB1213606A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681608355 DE1608355C3 (en) 1968-03-19 1968-03-19 Press tool for anisotropic permanent magnets

Publications (1)

Publication Number Publication Date
GB1213606A true GB1213606A (en) 1970-11-25

Family

ID=5681527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1213606D Expired GB1213606A (en) 1968-03-19 1969-03-10 A tool for the manufacture of permanent magnets

Country Status (3)

Country Link
US (1) US3564654A (en)
FR (1) FR2004206A1 (en)
GB (1) GB1213606A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3985843A (en) * 1971-09-17 1976-10-12 Magnetfabrik Bonn Gmbh Vorm. Gewerkschaft Windhorst Process for molding ring magnets for radially oriented particles
US4209481A (en) * 1976-04-19 1980-06-24 Toray Industries, Inc. Process for producing an anisotropically electroconductive sheet
DE2629990C3 (en) * 1976-07-03 1981-01-15 Magnetfabrik Bonn Gmbh Vorm. Gewerkschaft Windhorst, 5300 Bonn Press tool for anisotropic permanent magnets
DE2823054B1 (en) * 1978-05-26 1979-09-27 Philips Patentverwaltung Process for the production of plastic-bonded anisotropic permanent magnets
JPS61112310A (en) * 1984-11-07 1986-05-30 Sumitomo Bakelite Co Ltd Manufacture of permanent magnet
JPH0432257Y2 (en) * 1984-12-20 1992-08-03
JPS63313700A (en) * 1987-06-15 1988-12-21 Akira Hirai Powder press
US5049053A (en) * 1988-08-18 1991-09-17 Hitachi Metals, Ltd. Metal mold for molding anisotropic permanent magnets
US5672363A (en) * 1990-11-30 1997-09-30 Intermetallics Co., Ltd. Production apparatus for making green compact
US6649124B2 (en) * 2000-07-17 2003-11-18 Sumitomo Special Metals Co., Ltd. Powder pressing apparatus and powder pressing method
JP3632020B2 (en) * 2001-10-24 2005-03-23 Ｔｄｋ株式会社 Method for producing oxide magnetic material based permanent magnet

Also Published As

Publication number Publication date
US3564654A (en) 1971-02-23
FR2004206A1 (en) 1969-11-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee