CN103887056A - Neodymium-iron-boron adhesive magnet forming machine and machining process for neodymium-iron-boron adhesive magnet - Google Patents
Neodymium-iron-boron adhesive magnet forming machine and machining process for neodymium-iron-boron adhesive magnet Download PDFInfo
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- CN103887056A CN103887056A CN201410092668.3A CN201410092668A CN103887056A CN 103887056 A CN103887056 A CN 103887056A CN 201410092668 A CN201410092668 A CN 201410092668A CN 103887056 A CN103887056 A CN 103887056A
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- forming machine
- iron boron
- neodymium iron
- bonded magnet
- magnetic field
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- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 49
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 238000003754 machining Methods 0.000 title abstract 7
- 239000000853 adhesive Substances 0.000 title abstract 4
- 230000001070 adhesive effect Effects 0.000 title abstract 4
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000007906 compression Methods 0.000 claims abstract description 14
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000012545 processing Methods 0.000 claims description 17
- 238000005516 engineering process Methods 0.000 claims description 13
- 238000009826 distribution Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 claims description 8
- 229920000299 Nylon 12 Polymers 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000005347 demagnetization Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 13
- 238000001125 extrusion Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 230000005389 magnetism Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000007590 electrostatic spraying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Abstract
The invention discloses a neodymium-iron-boron adhesive magnet forming machine and a machining process for a neodymium-iron-boron adhesive magnet. The forming machine comprises a spiral material pushing device, wherein a compression material divider is installed at the discharge end of the spiral material pushing device, and a magnetic field orientation coil is installed at the end, away from the spiral material pushing device, of the compression material divider. The forming machine has the advantages that the size is small, the structure is simple, operation is easy and operating cost is low; compared with crushing equipment in the prior art, the forming machine has the advantages that energy consumption is low under the same yield condition, quick-wear parts are convenient and fast to replace, and quality of magnets is high. The machining process includes the five steps of material mixing, pelleting, extrusion molding, demagnetizing and cutting. The machining process has the advantages that the number of procedures is small, the machining cycle is short and machining efficiency is high, and various performance indexes of neodymium-iron-boron permanent magnets machined through the machining process are substantially improved.
Description
Technical field
The present invention relates to a kind of magnet process equipment and processing technology, specifically, relate to the processing technology of a kind of bonded magnet forming machine and bonded magnet.
Background technology
Twentieth century end, man invented neodymium iron boron (NdFeB) permanent magnetism, with enrich cheap neodymium replace rare costliness cobalt manufacture rare earth permanent magnet, not only increased substantially magnetic property, and greatly reduced strategic resources--the dependence of cobalt.Due to the significantly reduction of cost, make a large amount of manufactures and extensive use rare earth permanent magnet become possibility.
Nd-Fe-B permanent magnetic has higher remanent magnetism, coercive force, magnetic energy product, and there is good dynamic recovery, it is the strongest one of magnetic in the magnetic material of finding in the world at present, large several times to tens times than the ferrite permanent-magnet of extensive use of its magnetic properties, nearly double than the first generation, second generation rare earth magnet (samarium cobalt permanent magnet).Owing to thering is the very high ratio of performance to price, make it just become the ideal material of manufacturing high-effect, small size, light weight magnetic function device, also progressively replace the status of conventional permanent magnet in every profession and trade application.
At present, be also imperfection all of the process equipment of Nd-Fe-B permanent magnet or the processing technology of Nd-Fe-B permanent magnet, there is many defects.As process equipment complexity, cost are high, be not easy operation; The operation of processing technology is various, inefficiency and the product quality that processes is poor, cost performance is low.
Summary of the invention
The technical problem to be solved in the present invention is to overcome above-mentioned defect, provide a kind of simple in structure, cost is low, easy-operating neodymium iron boron bonded magnet forming machine.In addition, also provide the processing technology of neodymium iron boron bonded magnet, this processing technology operation is few, and efficiency is high, and the product quality that processes is higher, cost performance is high.
For addressing the above problem, the technical solution adopted in the present invention is:
Neodymium iron boron bonded magnet forming machine, comprises spiral pusher device, it is characterized in that: the discharge end of described spiral pusher device is provided with compression feeding-distribution device, and described compression feeding-distribution device is provided with magnetic field orientating coil away from one end of spiral pusher device.
Compression feeding-distribution device can fully compress mixed material, the material after compression is extruded again simultaneously, guarantees the abundant mixing of material, and guarantees product self rigidity processing.
Improve as one:
Described compression feeding-distribution device comprises the porous plate and the tripper that are positioned at spiral pusher device discharging opening place, tripper is connected with compressing head, and the periphery of compressing head is provided with die head, and described die head is connected with a mouthful mould, the outside of described mouthful of mould is provided with heating collar, and described magnetic field orientating coil is positioned at the outside of heating collar.
Magnetic field orientating coil can carry out magnetic field orientating by material, makes material just realize magnetic field orientating in the process of processing, has saved operation, has improved operating efficiency, has reduced production cost.
Between described magnetic field orientating coil and heating collar, be provided with heat insulating mattress.
Heat insulating mattress can stop the heat transmission of heating collar effectively, prevents the normal magnetic field orientation of the heat effects magnetic field orientating coil of heating collar, guarantees carrying out smoothly of magnetic field orientating.
As further improvement:
The discharge end of described mouthful of mould is connected with cooling device.
Cooling device is directly connected with a mouthful mould, prevents from extruding ground magnet oxidized be exposed to air in the time of high temperature in, has effectively protected magnet.
Described spiral pusher device comprises machine barrel, and the two ends of machine barrel are provided with head, and the feed end of described machine barrel is provided with feeder, between feeder and the close head of feeder, is provided with reductor, and described speed reducer drive is connected with power set; In described machine barrel, be provided with screw charging ram, screw charging ram is connected with speed reducer drive near one end of feeder.
The periphery fixed packet of described machine barrel is wrapped with zone of heating.
Zone of heating can guarantee the temperature in machine barrel, and can stablize the temperature in machine barrel, for the abundant mixing of material lays the foundation.
As further improving:
An extruding-out process for neodymium iron boron bonded magnet, is characterized in that, described technique comprises the following steps:
A, by nylon 12 and magnetic and additive mixing in 4.5: 92.5: 3 by weight, heats at 180～200 ℃ of temperature mixing to nearly cake powdery;
The cake powder raw material in steps A is added granulation in comminutor by B, makes raw material form particle;
C is first heated to respectively 260～300 ℃ by each section of extrusion shaping machine, again particle is added in forming machine and stir, melt, form the magnetic mixture of viscous state, the magnetic mixture of viscous state mixes after shunting evenly by porous plate, the extruded velocity of forming machine is stabilized in to 5～10rpm, obtains the anisotropy neodymium iron boron bonded magnet after moulding;
D demagnetization, demagnetizes the anisotropy neodymium iron boron bonded magnet of moulding;
E cutting, cuts into by anisotropy neodymium iron boron bonded magnet the small magnet that meets dimensional requirement according to the actual needs.
Wherein, nylon 12 is from butadiene linearity, and hypocrystalline-crystallographic thermoplastic material hits nylon 12 and uses as bonding agent originally penalizing.It is low that nylon 12 has water absorption rate, good stability of the dimension, and lower temperature resistance is good, can reach-70 ℃, and fusing point is low, and processing and forming is easy, forming temperature wider range; Flexibility, chemical stability, oil resistance, resistance to wear are all better, and genus self-extinguishing, method is processed into monofilament, film, plate, rod, section bar can to adopt injection moulding, extrude etc., powder can adopt the method processing such as thermopnore infusion process, electrostatic spraying method, rotational forming, especially suitable coating in metal surface and spraying; Nylon 12 be good electrical insulators and the same with other polyamide can be because of moisture effect insulation property, it has good impact resistance chemical machine stability; The viscosity of nylon 12 depends primarily on humidity, temperature and storage time; Its mobility is fine, and shrinkage is between 0.5% to 2%.
Additive comprises coupling agent, plasticizer, lubricant etc.
As further improving:
In described step C, the pressure that in described forming machine, compressing head is pressed into the magnetic mixture of viscous state in mouthful mould is 50～200MPa.
In described step C, the stage of the squeezed entrance mould of magnetic mixture of viscous state is carried out stationary magnetic field orientation with oriented coils, applies pulse be simultaneously orientated with pulsed magnetic field by 50ms.
The anisotropic neodymium iron boron magnetic body being orientated is down to forming machine fast to 80 ℃ of cooling and shapings under the state that keeps stationary magnetic field, and in the process of whole processing technology, the alignment magnetic field of maintenance is consistent.
Owing to having adopted technique scheme, it is little that the present invention has equipment volume, simple in structure, easy to operate, and operating cost is low, compared with disintegrating apparatus in the past, have identical output power consumption low, change the quick and magnet quality high of consumable accessory.
The processing technology that the present invention states, has the efficiency high that operation is few, the process-cycle is short, process, and the property indices of the product-Nd-Fe-B permanent magnet processing by this processing technology all has raising by a relatively large margin.
For the performance of the Nd-Fe-B permanent magnet that makes of checking the present invention, choose some of the Nd-Fe-B permanent magnets (P) that traditional handicraft makes, as a control group, choose some of the Nd-Fe-B permanent magnets (B) that technique of the present invention makes simultaneously, as experimental group, to its performance index: remanent magnetism Br, coercivity H j, magnetic energy product (BH) max detect.Testing result as shown in Table 1.
Table one
As can be seen from Table I, the neodymium iron boron bonded magnet that control group adopts conventional equipment and traditional handicraft to process all greatly lags behind experimental group in remanent magnetism Br, coercivity H j, tri-indexs of magnetic energy product (BH) max, so the prepared neodymium iron boron bonded magnet of the present invention has the advantages that quality is good, cost performance is high.
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of a kind of embodiment of neodymium iron boron bonded magnet forming machine of the present invention;
Accompanying drawing 2 be in accompanying drawing 1 A-A to cutaway view;
Accompanying drawing 3 is the structural representations that compress feeding-distribution device and magnetic field orientating coil in neodymium iron boron bonded magnet forming machine of the present invention;
Accompanying drawing 4 be in accompanying drawing 3 B-B to cutaway view.
In figure: 1-reductor; 2-feeder; 3-machine barrel; 4-head; 5-connects end cap; 6-porous plate; 7-cooling device; 8-power transmission shaft; 9-zone of heating; 10-screw charging ram; 11-tripper; 12-compressing head; 13-magnetic field orientating coil; 14-heat insulating mattress; 15-mouth mould; 16-heating collar; 17-die head.
Embodiment
Embodiment: as depicted in figs. 1 and 2, neodymium iron boron bonded magnet forming machine, comprises spiral pusher device, and the discharge end of described spiral pusher device is provided with compression feeding-distribution device, compression feeding-distribution device is connected with head 4 by connecting end cap 5.
Described compression feeding-distribution device is provided with magnetic field orientating coil 13 away from one end of spiral pusher device.
As shown in Figure 3 and Figure 4, described compression feeding-distribution device comprises the porous plate 6 and the tripper 11 that are positioned at machine barrel 3 discharging opening places, tripper 11 is connected with compressing head 12, the periphery of compressing head 12 is provided with die head 17, die head 17 is connected with mouthful mould 15, and described tripper 11 is positioned at and is connected end cap 5 and die head 17 inside with compressing head 12.The outside of described mouthful of mould 15 is provided with heating collar 16, and described magnetic field orientating coil 13 is positioned at the outside of heating collar 16.Between described magnetic field orientating coil 13 and heating collar 16, be provided with heat insulating mattress 14.The discharge end of described mouthful of mould 15 is connected with cooling device 7, described cooling device 7 is refrigerating head, and refrigerating head links together with a mouthful mould 15, and refrigerating head inside is provided with the extrude passage identical with mouth mould 15 diameters, be provided with cooling chamber in the periphery of extruding passage, in cooling chamber, can inject coolant.
Described spiral pusher device comprises machine barrel 3, the two ends of machine barrel 3 are provided with head 4, the feed end of described machine barrel 3 is provided with feeder 2, between feeder 2 and the close head 4 of feeder 2, is provided with reductor 1, and described reductor 1 is connected with power set by power transmission shaft 8; In described machine barrel 3, be provided with screw charging ram 10, screw charging ram 10 is in transmission connection near one end and the reductor 1 of feeder 2.The periphery fixed packet of described machine barrel 3 is wrapped with zone of heating 9.
The extruding-out process of neodymium iron boron bonded magnet, described technique comprises the following steps:
A, by nylon 12 and magnetic and additive mixing in 4.5: 92.5: 3 by weight, heats at 180-200 ℃ of temperature mixing to nearly cake powdery;
The cake powder raw material in steps A is added granulation in comminutor by B, makes raw material form particle;
C is first heated to respectively 260-300 ℃ by each section of extrusion shaping machine, again particle is added in forming machine and stir, melt, form the magnetic mixture of viscous state, the magnetic mixture of viscous state mixes after shunting evenly by porous plate 6, the extruded velocity of forming machine is stabilized in to 5～10rpm, obtains the anisotropy neodymium iron boron bonded magnet after moulding;
D demagnetization, demagnetizes the anisotropy neodymium iron boron bonded magnet of moulding;
E cutting, cuts into by anisotropy neodymium iron boron bonded magnet the small magnet that meets dimensional requirement according to the actual needs.
In described step C, the pressure that in described forming machine, compressing head 12 is pressed into the magnetic mixture of viscous state in mouthful mould 15 is 50～200MPa.The size of pressure can regulate according to actual conditions or dissimilar product.
In described step C, the stage of the squeezed entrance mould of magnetic mixture of viscous state is carried out stationary magnetic field orientation with oriented coils, applies pulse be simultaneously orientated with pulsed magnetic field by 50ms.
The neodymium iron boron magnetic body being orientated is down to forming machine fast to 80 ℃ of cooling and shapings under the state that keeps stationary magnetic field, and in the process of whole processing technology, the alignment magnetic field of maintenance is consistent.
Above-mentioned comminutor is vacuum granulation machine, is commercially available equipment, and manufacturer is Weifang De-Nol Ci Ye Co., Ltd, model ZK-JB50L; Forming machine is neodymium iron boron bonded magnet forming machine of the present invention.
Claims (10)
1. neodymium iron boron bonded magnet forming machine, comprise spiral pusher device, it is characterized in that: the discharge end of described spiral pusher device is provided with compression feeding-distribution device, described compression feeding-distribution device is provided with magnetic field orientating coil (13) away from one end of spiral pusher device.
2. neodymium iron boron bonded magnet forming machine according to claim 1, it is characterized in that: described compression feeding-distribution device comprises the porous plate (6) and the tripper (11) that are positioned at spiral pusher device discharging opening place, described tripper (11) is connected with compressing head (12), the periphery of compressing head (12) is provided with die head (17), described die head (17) is connected with a mouthful mould (15), the outside of described mouthful of mould (15) is provided with heating collar (16), and described magnetic field orientating coil (13) is positioned at the outside of heating collar (16).
3. neodymium iron boron bonded magnet forming machine according to claim 2, is characterized in that: between described magnetic field orientating coil (13) and heating collar (16), be provided with heat insulating mattress (14).
4. neodymium iron boron bonded magnet forming machine according to claim 2, is characterized in that: the discharge end of described mouthful of mould (15) is connected with cooling device (7).
5. neodymium iron boron bonded magnet forming machine according to claim 1, it is characterized in that: described spiral pusher device comprises machine barrel (3), the two ends of machine barrel (3) are provided with head (4), the feed end of described machine barrel (3) is provided with feeder (2), between feeder (2) and the close head (4) of feeder (2), be provided with reductor (1), described speed reducer drive is connected with power set; In described machine barrel (3), be provided with screw charging ram (10), screw charging ram (10) is in transmission connection near one end and the reductor (1) of feeder (2).
6. neodymium iron boron bonded magnet forming machine according to claim 5, is characterized in that: the periphery fixed packet of described machine barrel (3) is wrapped with zone of heating (9).
7. an extruding-out process for neodymium iron boron bonded magnet, is characterized in that, described technique comprises the following steps:
A, by nylon 12 and magnetic and additive mixing in 4.5: 92.5: 3 by weight, heats at 180～200 ℃ of temperature mixing to nearly cake powdery;
The cake powder raw material in steps A is added granulation in comminutor by B, makes raw material form particle;
C is first heated to respectively 260～300 ℃ by each section of forming machine, again particle is added in forming machine and stir, melt, form the magnetic mixture of viscous state, the magnetic mixture of viscous state mixes after shunting evenly by porous plate (6), the extruded velocity of forming machine is stabilized in to 5～10rpm, obtains the anisotropy neodymium iron boron bonded magnet after moulding;
D demagnetization, demagnetizes the anisotropy neodymium iron boron bonded magnet of moulding;
E cutting, cuts into by anisotropy neodymium iron boron bonded magnet the small magnet that meets dimensional requirement according to the actual needs.
8. the extruding-out process of neodymium iron boron bonded magnet according to claim 7, it is characterized in that: in described step C, the pressure that compressing head in described forming machine (12) is pressed into the magnetic mixture of viscous state in a mouthful mould (15) is 50～200MPa.
9. the extruding-out process of neodymium iron boron bonded magnet according to claim 7, it is characterized in that: in described step C, the stage of the squeezed entrance mould of magnetic mixture of viscous state is carried out stationary magnetic field orientation with oriented coils, applies pulse be simultaneously orientated with pulsed magnetic field by 50ms.
10. the extruding-out process of neodymium iron boron bonded magnet according to claim 9, it is characterized in that: the neodymium iron boron magnetic body being orientated is down to forming machine fast to 80 ℃ of cooling and shapings under the state that keeps stationary magnetic field, in the process of whole processing technology, the alignment magnetic field of maintenance is consistent.
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| CN201410092668.3A CN103887056B (en) | 2014-03-01 | 2014-03-01 | The processing technology of neodymium iron boron bonded magnet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877048A (en) * | 2017-01-18 | 2017-06-20 | 启东乾朔电子有限公司 | Connector and its manufacture method |
| CN109500398A (en) * | 2018-12-28 | 2019-03-22 | 上海三环磁性材料有限公司 | A kind of binding rare earth permanent magnet oriontation molding die |
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| CN2222959Y (en) * | 1994-07-20 | 1996-03-20 | 北京矿冶研究总院 | Magnetic orientation anisotropic bonded magnet extrusion molding machine |
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| JP2007287764A (en) * | 2006-04-13 | 2007-11-01 | Sumitomo Metal Mining Co Ltd | Injection molding device and forming method of composite for resin bonding-type magnet |
| CN202983837U (en) * | 2012-11-01 | 2013-06-12 | 山西京宇天成科技有限公司 | Charging auxiliary device for neodymium ion boron jet mill |
| US20130187311A1 (en) * | 2011-12-27 | 2013-07-25 | Nichia Corporation | Method of manufacturing cylindrical bonded magnet and manufacturing equipment for cylindrical bonded magnet |
| CN203774081U (en) * | 2014-03-01 | 2014-08-13 | 潍坊德诺磁业有限公司 | NdFeB bonded magnet forming machine |
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2014
- 2014-03-01 CN CN201410092668.3A patent/CN103887056B/en not_active Expired - Fee Related
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| CN2222959Y (en) * | 1994-07-20 | 1996-03-20 | 北京矿冶研究总院 | Magnetic orientation anisotropic bonded magnet extrusion molding machine |
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| JP2007287764A (en) * | 2006-04-13 | 2007-11-01 | Sumitomo Metal Mining Co Ltd | Injection molding device and forming method of composite for resin bonding-type magnet |
| US20130187311A1 (en) * | 2011-12-27 | 2013-07-25 | Nichia Corporation | Method of manufacturing cylindrical bonded magnet and manufacturing equipment for cylindrical bonded magnet |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106877048A (en) * | 2017-01-18 | 2017-06-20 | 启东乾朔电子有限公司 | Connector and its manufacture method |
| CN109500398A (en) * | 2018-12-28 | 2019-03-22 | 上海三环磁性材料有限公司 | A kind of binding rare earth permanent magnet oriontation molding die |
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| CN103887056B (en) | 2017-07-04 |
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Denomination of invention: Neodymium-iron-boron adhesive magnet forming machine and machining process for neodymium-iron-boron adhesive magnet Effective date of registration: 20171206 Granted publication date: 20170704 Pledgee: Industrial Commercial Bank of China Ltd. Weicheng Weifang branch Pledgor: Weifang DawnMAG Co.,Ltd. Registration number: 2017980000538 |
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