CN103714965A - Manufacturing method for anisotropic permanent magnetic ferrite magnet - Google Patents
Manufacturing method for anisotropic permanent magnetic ferrite magnet Download PDFInfo
- Publication number
- CN103714965A CN103714965A CN201310667540.0A CN201310667540A CN103714965A CN 103714965 A CN103714965 A CN 103714965A CN 201310667540 A CN201310667540 A CN 201310667540A CN 103714965 A CN103714965 A CN 103714965A
- Authority
- CN
- China
- Prior art keywords
- permanent
- magnet
- magnetic
- ferrite
- magnetic powder
- 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
Links
Images
Landscapes
- Magnetic Ceramics (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention discloses a manufacturing method for an anisotropic permanent magnetic ferrite magnet and belongs to field of production of magnetic materials. The manufacturing method for the anisotropic permanent magnetic ferrite magnet comprises the following steps of quantitatively injecting liquid adhesive in the process of compression forming of magnets; adding lubricant in the process of preparation of permanent magnetic ferrite magnetic powder for mixing and dispersing. According to the manufacturing method, the consistency of magnetic property, production efficiency and technical indexes can be favorably improved.
Description
Technical field
The present invention relates to a kind of magnetic materials production method, a kind of method that particularly anisotropy permanent-magnet ferrite magnet is manufactured.
Background technology
Anisotropy permanent-magnet ferrite magnet need provide a magnetic field to carry out oriented to the particle of permanent magnetic ferrite magnetic powder when compressing, and magnet is upwards obtained compared with high magnetic characteristics user.The degree of orientation is higher, and the performance of magnetic material is just better, for obtaining the higher degree of orientation, needs permanent magnetic ferrite magnetic powder particle to have good lubrification and dispersiveness, and permanent magnetic ferrite magnetic powder particle is successfully arranged along magnetic direction in magnetic field.Blank after simultaneously compressing need to have certain mechanical strength and density uniformity, prevent transportation, pile up with sintering process in produce piece and cracking, this just needs between permanent magnetic ferrite magnetic powder particle, to have good cementability.Prior art is to reach the higher degree of orientation and the mechanical strength of blank, generally adopts Wet-pressing molding and dry-pressing formed.
Wet-pressing molding adopts permanent magnetic ferrite magnetic powder is made to slip, and water or other liquid are as disperseing medium, and General Decentralized medium accounts for 25～50% of slip weight, disperses medium as lubricant, dispersant and bonding agent herein.Wet-pressing molding has advantages of that the degree of orientation is high, magnetic property is higher, and its shortcoming is in pressing process, to need vacuum drawn to disperse medium, and compressing efficiency is low, and blank density is difficult for evenly, cause sintering after rate of finished products lower.
Dry-pressing formed be to disperse after adding the lubricant of solid state powder shape and bonding agent to mix in permanent magnetic ferrite magnetic powder simultaneously.Dry-pressing formed have advantages of that shaping efficiency is high, but owing to adding bonding agent in permanent magnetic ferrite magnetic powder, lubrification, dispersiveness and the fillibility of material are affected, make permanent magnetic ferrite magnetic powder particle arrange resistance along magnetic direction and increase, affect the magnet degree of orientation and magnetic property.
Summary of the invention
The object of the invention is to overcome above-mentioned Wet-pressing molding and dry-pressing formed shortcoming, improve shaping efficiency, rate of finished products and the magnetic property of magnetic part.
The present invention only adds lubricant not add bonding agent in material process processed, avoids the adverse effect of bonding agent to the lubrification of permanent magnetic ferrite magnetic powder, dispersiveness and fillibility.One or more that add stearic acid or stearates in permanent magnetic ferrite magnetic powder are as lubricant, addition is 0.4～2.0% of permanent magnetic ferrite magnetic powder weight, in batch mixer, mix, sieve or high speed dispersor that mixed permanent magnetic ferrite magnetic powder is crossed more than 100 orders disperse, and make permanent magnetic ferrite magnetic powder have good lubrification, dispersiveness and fillibility.
After the present invention adopts permanent magnetic ferrite magnetic powder particle to be orientated in compressing process, inject the method for liquid adhesive in magnetic field, avoid the impact of bonding agent on permanent magnetic ferrite magnetic powder orientation of particles degree.Its process is as follows: after adding permanent magnetic ferrite magnetic powder in mold cavity and completing, first carry out matched moulds, make upper die head seal mould type accent, start alignment magnetic field and keep alignment magnetic field, make permanent magnetic ferrite magnetic powder particle arrange and keep orientation constant along magnetic direction, then with constant displacement pump by the quantitative filling liquid bonding agent of pore (seeing shown in figure) in mold cavity, core rod, upper die head and wherein one or more of lower die head of mould, then the descending driven mold die cavity of upper die head, lower die head maintains static, and completes bidirectional pressed moulding.
Liquid adhesive of the present invention is conducive to rapid osmotic and disperse in permanent magnetic ferrite magnetic powder.It consists of one or more and the mixture (camphor content is 0～20%) of camphor in wherein one or more of ethanol, methyl alcohol, acetone and the mixture of water (content of water is 0～60%) or methyl alcohol, ethanol, carbon disulfide, toluene, acetone, kerosene, and the injection rate of liquid adhesive is 7～20% of magnetic weight.
The magnetic flux density of alignment magnetic field of the present invention should be greater than 350mT.
The invention has the beneficial effects as follows the shaping efficiency, rate of finished products and the magnetic property that have improved magnet.
Accompanying drawing explanation
Fig. 1 implements schematic diagram of the present invention.In accompanying drawing, mold cavity, upper die head, lower die head and core rod form mould jointly, and the common formation of constant displacement pump, pore system and liquid adhesive quantitatively provides the system of liquid adhesive to permanent magnetic ferrite magnetic powder, and alignment magnetic field line bag provides alignment magnetic field.
embodiment
Below in conjunction with embodiment, the invention will be further described, should understand following embodiment and only for the present invention is described, is not used in and limits the scope of the invention.
Embodiment 1:
Enforcement group: the permanent magnetic ferrite magnetic powder of taking the MYF-32B trade mark is raw material, adds lubricant by claim 3 is mixed 10 minutes in SHR-100A high speed mixer, in CM-250 dispersion machine, disperses.Mold cavity is reinforced is highly 38mm, is pressed into external diameter Ф 30, the annulus of internal diameter Ф 12.Liquid adhesive is that claimed in claim 2 its consists of wherein one or more of ethanol, methyl alcohol, acetone and the mixture of water, and liquid adhesive is to inject after the permanent magnetic ferrite magnetic powder magnetic field orientating in mold cavity.
Control group: the permanent magnetic ferrite magnetic powder of taking the MYF-32B trade mark is raw material, adopts original technology, when material system adds 0.9% calcium stearate that pan feeding is heavy as lubricant, adds 1.3% camphor that pan feeding is heavy as bonding agent.Adopt and organize identical raw material, mould, mixing and dispersing mode with enforcement, then suppress.
The sample piece of enforcement group and control group sintering at identical temperature, then tests magnetic property.
Table 1
| Magnetic property | Remanent magnetism Br (mT) | Coercive force (kA/m) | HCJ (kA/m) | Maximum magnetic energy product (kJ/m3) |
| Enforcement group | 391.4 | 231.6 | 236.5 | 27.8 |
| Control group | 384.3 | 228.1 | 233.0 | 25.9 |
As seen from Table 1, the magnetic property indices of enforcement group is all high than control group, and wherein maximum magnetic energy product is higher by 7.3% than control group.
Implementing assembly part average weight is 17.61 grams, standard deviation sigma=0.11, and control group blank average weight is 18.53 grams, standard deviation sigma=0.22.As can be seen here, the average blank weight of enforcement group is little, and the permanent magnetic ferrite magnetic powder apparent density that this explanation enforcement group makes is little, good dispersion; Implement assembly part weight standard poor little, illustrate and implement assembly part weight high conformity, the high conformity that permanent magnetic ferrite magnetic powder is filled.
Embodiment 2:
The permanent magnetic ferrite magnetic powder of taking the MYF-32B trade mark is raw material, by claim 3, adds lubricant, mixes 10 minutes in SHR-100A high speed mixer, in CM-250 dispersion machine, disperses.Mold cavity is reinforced is highly 38mm, is pressed into external diameter Ф 30, the annulus of internal diameter Ф 12.Liquid adhesive is that claimed in claim 2 its consists of one or more and the mixture of camphor in methyl alcohol, ethanol, carbon disulfide, toluene, acetone, kerosene, and liquid adhesive is to inject after the permanent magnetic ferrite magnetic powder magnetic field orientating in mold cavity.After blank sintering, test magnetic property.
Table 2
| Magnetic property | Remanent magnetism Br (mT) | Coercive force (kA/m) | HCJ (kA/m) | Maximum magnetic energy product (kJ/m3) |
| Numerical value | 391.2 | 234.8 | 237.9 | 27.7 |
Blank average weight is 17.68 grams, standard deviation sigma=0.12.
Magnetic property, blank average weight, the weight standard of the enforcement group in embodiment 2 and embodiment 1 are poor basically identical, illustrate that the dispersiveness of its magnetic property, material and fillibility are all better.
The above, be only preferred embodiment of the present invention, is not the present invention to be done to the restriction of any other form, and according to any modification or equivalent variations that technical spirit of the present invention is done, still belongs to the present invention's scope required for protection.
Claims (7)
1. the method that an anisotropy permanent-magnet ferrite magnet is manufactured, it is characterized in that: described anisotropy permanent-magnet ferrite magnet injects liquid adhesive in compressing process, be also included in permanent magnetic ferrite magnetic powder and add lubricant to mix dispersion in material process processed.
2. the method that a kind of anisotropy permanent-magnet ferrite magnet according to claim 1 is manufactured, it is characterized in that: it consists of one or more and the mixture (camphor content is 0～20%) of camphor in the mixture (content of water is 0～80%) of one or more and water in ethanol, methyl alcohol, acetone or methyl alcohol, ethanol, carbon disulfide, toluene, acetone, kerosene described liquid adhesive, the injection rate of described liquid adhesive is 7～20% of described permanent magnetic ferrite magnetic powder weight
.
3. the method that a kind of anisotropy permanent-magnet ferrite magnet according to claim 1 is manufactured, it is characterized in that: described lubricant is one or more of stearic acid or stearates, addition is 0.4～2.0% of described permanent magnetic ferrite magnetic powder weight.
4. the method that a kind of anisotropy permanent-magnet ferrite magnet according to claim 1 is manufactured, it is characterized in that: first add described permanent magnetic ferrite magnetic powder in mold cavity and open alignment magnetic field and make described permanent magnetic ferrite magnetic powder oriented, be pressed again after injecting described liquid adhesive when keeping alignment magnetic field.
5. the method for manufacturing according to a kind of anisotropy permanent-magnet ferrite magnet described in claim 1,2 and 4, is characterized in that: described liquid adhesive is quantitatively injected in described permanent magnetic ferrite magnetic powder by constant displacement pump and by the pore in described mold cavity, core rod, upper die head and wherein one or more of lower die head.
6. the method for manufacturing according to a kind of anisotropy permanent-magnet ferrite magnet described in claim 1 and 3, it is characterized in that: described permanent magnetic ferrite magnetic powder and lubricant mix in batch mixer, sieve or high speed dispersor that mixed permanent magnetic ferrite magnetic powder is crossed more than 100 orders disperse.
7. the method that a kind of anisotropy permanent-magnet ferrite magnet according to claim 4 is manufactured, is characterized in that: the magnetic flux density of the alignment magnetic field described in described mold cavity should be greater than 350mT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310667540.0A CN103714965A (en) | 2013-12-07 | 2013-12-07 | Manufacturing method for anisotropic permanent magnetic ferrite magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310667540.0A CN103714965A (en) | 2013-12-07 | 2013-12-07 | Manufacturing method for anisotropic permanent magnetic ferrite magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103714965A true CN103714965A (en) | 2014-04-09 |
Family
ID=50407850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310667540.0A Pending CN103714965A (en) | 2013-12-07 | 2013-12-07 | Manufacturing method for anisotropic permanent magnetic ferrite magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103714965A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460211A (en) * | 2019-07-16 | 2019-11-15 | 宁波韵升粘结磁体有限公司 | A kind of mold being molded permanent magnet for manufacturing anisotropy |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1645525A (en) * | 2005-01-20 | 2005-07-27 | 横店集团东磁有限公司 | Formula of composite bonded magnet |
| CN2754196Y (en) * | 2003-05-20 | 2006-01-25 | 株式会社协丰制作所 | Manufacturing apparatus for ring or arc magnet |
| CN101477866A (en) * | 2008-09-19 | 2009-07-08 | 广州金南磁塑有限公司 | Anisotropic flexible adhesion Nd-Fe-B magnets and manufacturing method thereof |
| CN102229492A (en) * | 2011-06-09 | 2011-11-02 | 南通万宝实业有限公司 | Method for preparing anisotropic bonded ferrite by compression process |
-
2013
- 2013-12-07 CN CN201310667540.0A patent/CN103714965A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2754196Y (en) * | 2003-05-20 | 2006-01-25 | 株式会社协丰制作所 | Manufacturing apparatus for ring or arc magnet |
| CN1645525A (en) * | 2005-01-20 | 2005-07-27 | 横店集团东磁有限公司 | Formula of composite bonded magnet |
| CN101477866A (en) * | 2008-09-19 | 2009-07-08 | 广州金南磁塑有限公司 | Anisotropic flexible adhesion Nd-Fe-B magnets and manufacturing method thereof |
| CN102229492A (en) * | 2011-06-09 | 2011-11-02 | 南通万宝实业有限公司 | Method for preparing anisotropic bonded ferrite by compression process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460211A (en) * | 2019-07-16 | 2019-11-15 | 宁波韵升粘结磁体有限公司 | A kind of mold being molded permanent magnet for manufacturing anisotropy |
| CN110460211B (en) * | 2019-07-16 | 2022-02-15 | 宁波韵升粘结磁体有限公司 | Mold for manufacturing anisotropic injection molding permanent magnet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103489621B (en) | A kind of employing two one-step forming techniques prepare the method for anisotropic bonded magnet | |
| CN102360918A (en) | Adhesive composite magnet and preparation method thereof | |
| CN104384510B (en) | The 3 D-printing manufacture method of isotropism bonded permanent magnet | |
| CN1846906A (en) | Micro injection process of forming soft magnetic Fe-Ni alloy | |
| CN111390163A (en) | Forming die and method for preparing high-performance radial neodymium ring magnet | |
| CN100481281C (en) | Process for clinkering anisotropic permanent ferrite through polymer bonding and modeling | |
| CN106756579A (en) | A kind of fe-Ni soft magnetic alloy and fe-Ni soft magnetic alloy part with shot-range ordered structure | |
| CN102568731A (en) | High-corrosion-resistance sintered neodymium-iron-boron-based permanent magnet material prepared by doping zinc nano-particles and preparation method thereof | |
| CN103065760A (en) | Integral type anisotropic multipolar ferrite bead and preparation method thereof | |
| US10210972B2 (en) | Heat-resistant isotropic bonded NdFeB magnet and its preparation technology | |
| CN102173768B (en) | Preparation method of high-performance radially isotropic dry pressing permanent magnetic ferrite | |
| CN103128286B (en) | Anisotropism sintering rare earth permanent magnetic material radial orientation device and orientation method thereof | |
| CN105206369B (en) | A kind of high temperature resistant anisotropic bonded NdFeB magnet and preparation method thereof | |
| CN101556863B (en) | Preparing method of nylon bonded Nd-Fe-B magnet | |
| CN103714965A (en) | Manufacturing method for anisotropic permanent magnetic ferrite magnet | |
| KR102454806B1 (en) | Anisotropic bonded magnet and preparation method thereof | |
| CN103295770B (en) | A kind of preparation method of compoiste adhering permanent magnet | |
| CN203140772U (en) | Anisotropic sintering rare earth permanent magnetic material radial orientation device | |
| CN107200569A (en) | A kind of high-performance dry-pressing permanent-magnet ferrite rotor and its manufacture method | |
| CN103594217B (en) | A kind of isotropism rare-earth bound permanent magnet material and preparation method thereof | |
| CN101937769A (en) | High-speed press forming method for anisotropic binder-free neodymium iron boron magnet | |
| CN105895360A (en) | Preparation method of anisotropic magnet | |
| CN102964090B (en) | High-fluidity ferrite-nylon granule material and preparation method thereof | |
| CN109438974A (en) | It is a kind of to prepare injecting ferrite additive and a kind of injecting ferrite and preparation method thereof | |
| CN206003579U (en) | A kind of aligning device of injection anisotropic bond ferrimagnet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140409 |