GB2226789B - Method for forming doughnut-shaped permanent magnet and forming mold therefor - Google Patents
Method for forming doughnut-shaped permanent magnet and forming mold thereforInfo
- Publication number
- GB2226789B GB2226789B GB8929319A GB8929319A GB2226789B GB 2226789 B GB2226789 B GB 2226789B GB 8929319 A GB8929319 A GB 8929319A GB 8929319 A GB8929319 A GB 8929319A GB 2226789 B GB2226789 B GB 2226789B
- Authority
- GB
- United Kingdom
- Prior art keywords
- forming
- permanent magnet
- doughnut
- shaped permanent
- mold therefor
- 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 - Lifetime
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)
- Moulds For Moulding Plastics Or The Like (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
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 (3)
Publication Number | Publication Date |
---|---|
GB8929319D0 GB8929319D0 (en) | 1990-02-28 |
GB2226789A GB2226789A (en) | 1990-07-11 |
GB2226789B true GB2226789B (en) | 1992-04-29 |
Family
ID=18241149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8929319A Expired - Lifetime GB2226789B (en) | 1988-12-29 | 1989-12-29 | 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)
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)
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. |
-
1988
- 1988-12-29 JP JP33121288A patent/JPH02178011A/en active Pending
-
1989
- 1989-12-29 CN CN 89109848 patent/CN1044187A/en active Pending
- 1989-12-29 FR FR8917424A patent/FR2641228A1/en active Granted
- 1989-12-29 GB GB8929319A patent/GB2226789B/en not_active Expired - Lifetime
- 1989-12-29 DE DE19893943328 patent/DE3943328C2/en not_active Expired - Fee Related
- 1989-12-29 CH CH468089A patent/CH681183A5/de not_active IP Right Cessation
-
1994
- 1994-03-17 HK HK22494A patent/HK22494A/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE3943328C2 (en) | 1995-04-27 |
JPH02178011A (en) | 1990-07-11 |
FR2641228B1 (en) | 1995-02-24 |
GB8929319D0 (en) | 1990-02-28 |
GB2226789A (en) | 1990-07-11 |
DE3943328A1 (en) | 1990-07-05 |
CN1044187A (en) | 1990-07-25 |
CH681183A5 (en) | 1993-01-29 |
HK22494A (en) | 1994-03-25 |
FR2641228A1 (en) | 1990-07-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
746 | Register noted 'licences of right' (sect. 46/1977) |
Effective date: 19930520 |
|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19951229 |