HK22494A - Method for forming doughnut-shaped permanent magnet and forming mold therefor - Google Patents

Method for forming doughnut-shaped permanent magnet and forming mold therefor

Info

Publication number
HK22494A
HK22494A HK22494A HK22494A HK22494A HK 22494 A HK22494 A HK 22494A HK 22494 A HK22494 A HK 22494A HK 22494 A HK22494 A HK 22494A HK 22494 A HK22494 A HK 22494A
Authority
HK
Hong Kong
Prior art keywords
forming
permanent magnet
doughnut
shaped permanent
mold therefor
Prior art date
Application number
HK22494A
Inventor
Kazuhito Yoshida
Hiroshi Noritake
Toshio Shimizu
Original Assignee
Seikosha Kk
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 Seikosha Kk filed Critical Seikosha Kk
Publication of HK22494A publication Critical patent/HK22494A/en

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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/58—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres
    • B29C70/62—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres the filler being oriented during moulding
    • 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
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2616—Moulds having annular mould cavities
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
    • B29C70/882—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding
    • 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
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B29C45/2708—Gates
    • B29C2045/2714—Gates elongated, e.g. film-like, annular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B29K2995/0005—Conductive

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Power Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
HK22494A 1988-12-29 1994-03-17 Method for forming doughnut-shaped permanent magnet and forming mold therefor HK22494A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33121288A JPH02178011A (en) 1988-12-29 1988-12-29 Manufacture of annular permanent magnet, annular permanent magnet manufactured thereby and mold for annular permanent magnet

Publications (1)

Publication Number Publication Date
HK22494A true HK22494A (en) 1994-03-25

Family

ID=18241149

Family Applications (1)

Application Number Title Priority Date Filing Date
HK22494A HK22494A (en) 1988-12-29 1994-03-17 Method for forming doughnut-shaped permanent magnet and forming mold therefor

Country Status (7)

Country Link
JP (1) JPH02178011A (en)
CN (1) CN1044187A (en)
CH (1) CH681183A5 (en)
DE (1) DE3943328C2 (en)
FR (1) FR2641228A1 (en)
GB (1) GB2226789B (en)
HK (1) HK22494A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3893987B2 (en) * 2001-03-16 2007-03-14 東海ゴム工業株式会社 Molding method for tank joint parts and ring-shaped resin moldings
DE10125560A1 (en) * 2001-05-23 2002-11-28 Basf Ag Production of profiled parts of increased ductility from polyamide nanocomposites containing polyamide A and a delaminated silicate layer consisting of hydrophobized bentonite
CN101447331B (en) * 2002-10-08 2011-08-17 日立金属株式会社 Production method of sintered R-Fe-B permanent magnet
DE102005017543A1 (en) * 2005-04-16 2006-10-19 Balda Solutions Deutschland Gmbh Method for producing plastic items with integral magnetic pattern by including magnetic particles into the moulding process
CN101882505A (en) * 2010-04-08 2010-11-10 广元瑞峰精工机械制造有限公司 Improvement structure of slight structure precision mold

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55145326A (en) * 1979-05-02 1980-11-12 Daido Steel Co Ltd Manufacturing method of anistropic magnet
US4549157A (en) * 1982-05-27 1985-10-22 Xolox Corporation Plastic bonded magnet with circumferentially spaced poles having substantially uniform magnetic properties
JPS59216453A (en) * 1983-05-20 1984-12-06 Hitachi Metals Ltd Manufacture of cylindrical permanent magnet
JPS60220917A (en) * 1984-04-17 1985-11-05 Hitachi Metals Ltd Manufacture for anisotropic magnetic roll
JPS60246614A (en) * 1984-05-22 1985-12-06 Hitachi Metals Ltd Manufacture of anisotropic magnet roll
JP2558628B2 (en) * 1985-12-23 1996-11-27 松下電器産業株式会社 Method for manufacturing anisotropic resin magnets
EP0261292B1 (en) * 1986-07-28 1992-06-10 Crucible Materials Corporation Method of producing fully dense permanent magnet alloy article
NL8701394A (en) * 1987-06-16 1989-01-16 Kinetron Bv MULTI-POLE ROTOR.

Also Published As

Publication number Publication date
GB8929319D0 (en) 1990-02-28
GB2226789B (en) 1992-04-29
CN1044187A (en) 1990-07-25
DE3943328C2 (en) 1995-04-27
DE3943328A1 (en) 1990-07-05
FR2641228B1 (en) 1995-02-24
JPH02178011A (en) 1990-07-11
CH681183A5 (en) 1993-01-29
GB2226789A (en) 1990-07-11
FR2641228A1 (en) 1990-07-06

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