CN112712988A - Positioning adsorption magnet and preparation method and application thereof - Google Patents
Positioning adsorption magnet and preparation method and application thereof Download PDFInfo
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- CN112712988A CN112712988A CN202011448565.8A CN202011448565A CN112712988A CN 112712988 A CN112712988 A CN 112712988A CN 202011448565 A CN202011448565 A CN 202011448565A CN 112712988 A CN112712988 A CN 112712988A
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0231—Magnetic circuits with PM for power or force generation
- H01F7/0247—Orientating, locating, transporting arrangements
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Abstract
The invention discloses a positioning adsorption magnet and a preparation method and application thereof. The positioning adsorption magnet is prepared by the following preparation method: mixing the magnetic powder and the binder, then performing injection molding and magnetizing. The positioning adsorption magnet obtained through injection molding has the advantages of simple production process, short operation flow, low cost, good magnetic property, high resistivity and the like, and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of magnetic materials, in particular to a positioning adsorption magnet and a preparation method and application thereof.
Background
At present, many occasions need to be adsorbed by positioning, for example, when a mobile phone is charged wirelessly, a coil at a charging end needs to be aligned with a coil at a mobile phone end, and the charging efficiency can reach the highest. In the prior art, 36 (more or less) high-performance sintered Nd-Fe-B sheets are magnetized (single-sided or double-sided charging of two electrodes) and then spliced into a ring. Two parts 1 and 2 with opposite magnetic poles are respectively manufactured (refer to the attached figure 1), and then when the two parts are close to each other, the positioning and the adsorption are completed under the action of magnetic attraction force.
The existing technical scheme adopts a splicing mode instead of a mode of an integral ring, and mainly has the following two reasons: 1. the sintered neodymium iron boron is a brittle material, has an integral sheet structure, is easy to damage and is difficult to post-process (electroplating and the like); 2. the whole circular ring has small resistivity, and can generate eddy current during charging, thereby not only influencing the charging efficiency, but also causing temperature rise. Therefore, the prior art has the defects of complex production process, long operation flow, overhigh cost and the like.
Disclosure of Invention
In order to overcome the problems of the positioning and attracting magnet in the prior art, the invention provides a positioning and attracting magnet with the advantages of simple production process, short operation flow, low cost and the like, and provides a preparation method of the positioning and attracting magnet and an application of the positioning and attracting magnet.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention provides a preparation method of a positioning adsorption magnet, which comprises the following steps:
and mixing the magnetic powder with the binder, then performing injection molding and magnetizing to obtain the positioning adsorption magnet.
Preferably, in the method for manufacturing the positioning adsorption magnet, the mass ratio of the magnetic powder to the binder is 10: (0.5 to 2); further preferably, the mass ratio of the magnetic powder to the binder is 10: (0.8 to 1.2).
Preferably, in the preparation method of the positioning adsorption magnet, the magnetic powder comprises at least one of aluminum-nickel-cobalt permanent magnet alloy powder, iron-cobalt permanent magnet alloy powder, permanent magnetic ferrite powder and rare earth permanent magnet powder; further preferably, the magnetic powder includes at least one of permanent magnetic ferrite magnetic powder and neodymium iron boron magnetic powder. In some embodiments of the present invention, the magnetic powder is selected from at least one of anisotropic ferrite magnetic powder and anisotropic neodymium iron boron magnetic powder.
Preferably, in the method for manufacturing the positioning adsorption magnet, the binder includes at least one of Polyamide (PA), Chlorinated Polyethylene (CPE), nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR), polyvinyl chloride (PVC), Polyethylene (PE), polypropylene (PP), Polyphenylene Sulfide (PPs), epoxy resin, ethylene-vinyl acetate copolymer (EVA), ethylene acrylic acid copolymer (EAA), Ethylene Ethyl Acrylate (EEA), thermoplastic elastomer (TPE), Isoprene Rubber (IR), butyl rubber (IIR), Chloroprene Rubber (CR), Ethylene Propylene Diene Monomer (EPDM), Natural Rubber (NR), ethylene-vinyl acetate copolymer emulsion (EVA emulsion), propyl benzene emulsion, silicone-propyl emulsion, acrylic emulsion, vinyl acetate emulsion, polyurethane emulsion, and silicone. Wherein the thermoplastic elastomer comprises at least one of polyolefin thermoplastic elastomer (POE), thermoplastic polyurethane elastomer (TPU), styrene thermoplastic elastomer (SBS) and hydrogenated styrene-butadiene block copolymer (SEBS). Further preferably, the binder is at least one selected from the group consisting of polyamide, chlorinated polyethylene, nitrile rubber, hydrogenated nitrile rubber, polyphenylene sulfide, epoxy resin, ethylene-vinyl acetate copolymer, isoprene rubber, butyl rubber, chloroprene rubber, ethylene propylene diene monomer rubber, natural rubber, and silicone rubber.
Preferably, the preparation method of the positioning adsorption magnet further comprises adding an auxiliary agent for mixing.
In the preparation method of the positioning adsorption magnet, an auxiliary agent can be added according to actual needs to meet the requirements of production or application. The addition amount of the auxiliary agent is preferably to meet the requirements of production or application. In some embodiments of the present invention, the amount of the auxiliary agent is 0.05% to 5%, preferably 0.1% to 2%, of the total mass of the magnetic powder and the binder.
Preferably, in the preparation method of the positioning adsorption magnet, the auxiliary agent comprises at least one of an antioxidant, a stabilizer, a lubricant, a coupling agent, an ultraviolet absorber, a dispersant, a defoaming agent, a thickener and a plasticizer.
Preferably, the antioxidant is at least one of hindered phenol antioxidants, phosphite antioxidants, hindered amine antioxidants, thioester antioxidants and inorganic phosphate antioxidants.
Preferably, the stabilizer is at least one of a lead salt stabilizer, a metal soap stabilizer, an organic tin stabilizer, an organic antimony stabilizer, an organic rare earth stabilizer, a calcium zinc stabilizer and epoxidized soybean oil.
Preferably, the lubricant is at least one of silicone oil, silicone powder, white mineral oil, vegetable oil, fatty acid amide, stearic acid, stearate, montanate, paraffin wax, polyethylene wax, ethylene bis-stearamide, pentaerythritol bis-stearate.
Preferably, the coupling agent is at least one of a silane coupling agent, a titanate coupling agent, an aluminate coupling agent, a zirconate coupling agent and a rare earth coupling agent.
Preferably, the ultraviolet absorber is at least one of benzophenones, benzotriazoles, salicylates, triazines, substituted acrylonitriles and hindered amine light stabilizers.
Preferably, the dispersant is at least one of sodium oleate, carboxylate, sulfate ester salt, sulfonate, octadecenylamine acetate, alkyl quaternary ammonium salt, aminopropylamine dioleate, modified polyaminoamide phosphate, fatty acid ethylene oxide adduct, polyethylene glycol polyol, polyethyleneimine derivative, phosphate ester high molecular polymer and oleyl aminooleate.
Preferably, the defoaming agent is at least one of an organic silicon defoaming agent, a polyether modified organic silicon defoaming agent, mineral oil and a modified product thereof, and natural oil.
Preferably, the thickener is at least one of a natural thickener, a cellulose thickener, an inorganic thickener, and a synthetic polymer thickener.
Preferably, the plasticizer is at least one of phthalate plasticizers, fatty acid ester plasticizers, phosphate plasticizers and epoxy ester plasticizers.
Preferably, in the preparation method of the positioning adsorption magnet, the injection molding is performed under the condition that the magnetic field intensity is 0T-3T. When the magnetic field intensity is 0T, non-oriented injection molding is carried out, and the adopted magnetic powder is isotropic magnetic powder, such as isotropic ferrite magnetic powder and isotropic neodymium iron boron magnetic powder; when the magnetic field intensity is not 0T, the orientation injection molding is carried out. When the injection molding is the orientation injection molding, the magnetic field strength of the injection molding is preferably 100mT to 3T, and more preferably 600mT to 1T.
Preferably, in the preparation method of the positioning adsorption magnet, the injection molding temperature of the injection molding is 230-280 ℃; further preferably, the injection molding temperature of the injection molding is 245-265 ℃.
Preferably, in the preparation method of the positioning adsorption magnet, the injection molding pressure of the injection molding is 0.3MPa to 1 MPa; more preferably, the injection pressure of the injection molding is 0.5MPa to 0.7 MPa.
Preferably, the temperature of the injection mold is 50-160 ℃ during injection molding; further preferably, the temperature of the injection mold is 120-150 ℃.
Preferably, in the method for manufacturing the positioning adsorption magnet, the injection molding mode includes at least one of axial orientation injection molding and interpolar orientation injection molding. The injection molding of the orientation such as the axial orientation injection molding or the inter-electrode orientation injection molding means that the orientation (axial orientation or inter-electrode orientation) is performed simultaneously at the time of injection molding. The axial orientation refers to an N pole and an S pole of an external magnetic field and is respectively arranged above and below a product, so that an orientation field which is uniformly distributed along the thickness direction of the magnet is obtained, the easy magnetization directions of the magnetic powder are arranged along the direction of the magnetic field during injection molding, and the schematic diagram of the axial orientation can be seen in an attached drawing 2. The orientation of the interelectrode means that the N pole and the S pole of the external magnetic field are at the same end of the product, so as to obtain an arc-shaped orientation field, the easy magnetization direction of the magnetic powder is arranged along the magnetic field direction during injection molding, and the schematic diagram of the orientation of the interelectrode can be seen in fig. 3. By means of the orientation between the poles, the magnetic flux leakage on one side of the magnet can be reduced during the subsequent magnetization, thereby enhancing the magnetic properties of the working surface.
Preferably, in the method for preparing the positioning adsorption magnet, the shape of the positioning adsorption magnet comprises at least one of a circular ring, an arc, an ellipse and a rectangle; further preferably, the shape of the positioning adsorption magnet comprises a circular ring and/or an arc. The shape of the positioning adsorption magnet can be adjusted according to actual needs, and then injection molding is carried out by selecting and using a mold with a corresponding shape.
Preferably, when the positioning adsorption magnet is in the shape of a circular ring, the inner diameter of the circular ring is 40mm to 50mm, the outer diameter of the circular ring is 50mm to 60mm, and the inner diameter and the outer diameter are not 50mm at the same time; more preferably, the inner diameter of the circular ring is 40 mm-48 mm, and the outer diameter is 50 mm-60 mm; still more preferably, the inner diameter of the ring is 44mm to 48mm, and the outer diameter is 52mm to 56 mm. The thickness of the circular ring can be adjusted according to actual needs, for example, the thickness is 0.2 mm-3 mm. In some embodiments of the invention, the thickness of the ring is between 0.5mm and 1 mm.
The second aspect of the present invention provides a positioning adsorption magnet produced by the production method according to the first aspect of the present invention.
A third aspect of the invention provides a positioning and attracting assembly including at least two positioning and attracting magnets according to the second aspect of the invention, the two positioning and attracting magnets having opposite poles.
A fourth aspect of the invention provides the use of a positioning and adsorbing magnet according to the second aspect of the invention in the fields of electronics, machinery, toys, packaging, home, or aerospace.
In some embodiments of the present invention, the positioning adsorption magnet is applied to wireless charging, for example, the positioning adsorption magnet provided by the present invention is disposed on an electronic device, so that accurate positioning adsorption with a wireless charger can be achieved.
In some embodiments of the present invention, the positioning adsorption magnet is applied to a mobile phone, for example, the positioning adsorption magnet provided by the present invention is disposed in a mobile phone, so that accurate positioning adsorption with a wireless charger or a vehicle-mounted mobile phone cradle can be achieved.
In some embodiments of the present invention, the positioning adsorption magnet is applied to the mobile phone shell, for example, the positioning adsorption magnet provided by the present invention is disposed in the mobile phone shell, so that a mobile phone using the mobile phone shell can realize accurate positioning adsorption with the wireless charger or the vehicle-mounted mobile phone cradle.
In some embodiments of the present invention, the positioning and adsorbing magnet is applied to a toy, for example, the positioning and adsorbing magnet provided by the present invention is disposed in an electronic toy, so that accurate positioning and adsorption with a wireless charger can be realized; or a first positioning adsorption magnet is arranged in the first toy, a second positioning adsorption magnet is arranged in the second toy, the magnetic poles of the first positioning adsorption magnet and the second positioning adsorption magnet are opposite, and the positioning adsorption assembly formed by the two positioning adsorption magnets can realize accurate positioning adsorption between the two toys.
The invention has the beneficial effects that:
the positioning adsorption magnet obtained through injection molding has the advantages of simple production process, short operation flow, low cost, good magnetic property, high resistivity and the like, and has wide application prospect.
Specifically, compared with the prior art, the invention has the following advantages:
1. the high-performance magnet for positioning and adsorption is prepared by an injection molding mode, and the magnet is integrally injection molded, so that the process is simple and convenient, and the cost is low.
2. By adjusting the binder, the injection molding magnet obtained by the invention can be rigid or flexible, and has the advantages of flexible and convenient use and wide application.
3. The injection molding magnet provided by the invention has large resistivity, small interference to electromagnetic waves and small temperature rise during charging, and can be integrally made to prevent heating during charging.
4. The injection molding mode is various, common axial orientation and magnetization can be realized through orientation injection molding, and the magnetism of the working surface can be strengthened through interpolar orientation and magnetization, so that a better positioning and adsorption function is achieved.
Drawings
FIG. 1 is a schematic view of a prior art positioning suction assembly;
FIG. 2 is a schematic view of an axial orientation;
FIG. 3 is a schematic view of the interpolar orientation;
FIG. 4 is a schematic view of a positioning and adsorbing assembly according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples. The starting materials, reagents or apparatus used in the examples and comparative examples were obtained from conventional commercial sources or can be obtained by a method of the prior art, unless otherwise specified. Unless otherwise indicated, the testing or testing methods are conventional in the art.
Example 1
Mixing anisotropic ferrite magnetic powder, a polyamide binder, a silane coupling agent and a phthalate plasticizer, and granulating, wherein the mass ratio of the anisotropic ferrite magnetic powder to the polyamide binder is 10:1, and the use amounts of the silane coupling agent and the phthalate plasticizer respectively account for 1% of the mass sum of the anisotropic ferrite magnetic powder and the polyamide binder; then, under the condition that an orientation field is 1T, carrying out axial orientation injection molding to form a circular ring, wherein an axial orientation schematic diagram can be shown in FIG. 2, the injection molding temperature is 260 ℃, the injection molding pressure is 0.6MPa, the injection molding mold temperature is 120 ℃, the inner diameter of the prepared circular ring is 46.1mm, the outer diameter is 54.1mm, and the thickness is 1 mm; and magnetizing after the injection molded product is demagnetized to obtain the positioning adsorption magnet of the embodiment.
Example 2
Mixing and granulating the neodymium-iron-boron anisotropic powder, a polyamide binder, a silane coupling agent and a phthalate plasticizer, wherein the mass ratio of the neodymium-iron-boron anisotropic powder to the polyamide binder is 10:1, and the use amounts of the silane coupling agent and the phthalate plasticizer respectively account for 1% of the sum of the mass of the neodymium-iron-boron anisotropic powder and the mass of the polyamide binder; then carrying out interelectrode orientation injection molding to form a ring under the condition that an orientation field is 600mT, wherein an interelectrode orientation schematic diagram can be shown in FIG. 3, the injection molding temperature is 260 ℃, the injection molding pressure is 0.65MPa, the injection molding mold temperature is 150 ℃, the inner diameter of the prepared ring is 46.1mm, the outer diameter is 54.1mm, and the thickness is 1 mm; and magnetizing after the injection molded product is demagnetized to obtain the positioning adsorption magnet of the embodiment.
Comparative example
The positioning adsorption magnet of a circular ring formed by splicing 36 sintered NdFeB magnetic sheets is used as a comparative example, and the inner diameter of the prepared circular ring is 46.1mm, the outer diameter of the prepared circular ring is 54.1mm, and the thickness of the prepared circular ring is 0.55 mm.
Table 1 shows the results of the performance test of the positioning absorption magnets of examples 1 and 2 and the comparative example. Wherein the resistivity data of the comparative example is data of the bulk sintered neodymium iron boron material.
TABLE 1 test results of performance of positioning adsorption magnet
As can be seen from the comparison of the test results in Table 1, the positioning adsorption magnet prepared in the example has good magnetic property and larger specific resistance ratio than the comparative example.
FIG. 4 is a schematic view of a positioning and adsorbing assembly according to the present invention. In fig. 4, the outer working surface of the component 1 of the positioning and adsorbing assembly is an annular S pole, and the inner working surface is an annular N pole; the outer working surface of the part 2 of the positioning adsorption component is an annular N pole, and the inner working surface of the part 2 of the positioning adsorption component is an annular S pole. As can be seen from comparison between fig. 4 and fig. 1, the positioning and adsorbing magnet manufactured by the injection molding method according to the embodiment of the present invention can be integrally molded to form a complete ring-shaped magnetic pole. By combining the members 1 and 2 having the opposite magnetic poles as shown in fig. 4, a positioning suction unit can be obtained.
The positioning adsorption magnet and the positioning adsorption component provided by the embodiment of the invention have wide application, and are suitable for the fields of electronics, machinery, toys, packaging, home furnishing or aerospace. Specific application examples are as follows:
1. the location adsorption magnet is installed in the cell-phone, perhaps installs in the cell-phone shell, and this be equipped with the cell-phone that the location adsorbed the magnet, perhaps use the cell-phone that is equipped with the cell-phone shell that the location adsorbed the magnet, can realize accurate location with wireless end of charging and adsorb, make the efficiency of charging reach the highest, perhaps can realize accurate location with on-vehicle cell phone stand again and adsorb.
2. The subassembly is adsorbed in the location is used on electronic toy, and this electronic toy who adsorbs the magnet in the location is equipped with, can realize accurate location with wireless end that charges and adsorb, realizes efficient wireless charging.
3. The positioning adsorption magnet A is arranged on one building block toy, the positioning adsorption magnet B is arranged on the other building block toy, the magnetic poles of the positioning adsorption magnet A and the positioning adsorption magnet B are opposite (see the part 1 and the part 2 shown in figure 4), and accurate positioning adsorption can be realized between the two building block toys.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A preparation method of a positioning adsorption magnet is characterized by comprising the following steps: the method comprises the following steps:
and mixing the magnetic powder with the binder, then performing injection molding and magnetizing to obtain the positioning adsorption magnet.
2. The method of claim 1, wherein: the mass ratio of the magnetic powder to the binder is 10: (0.5-2).
3. The method of claim 1, wherein: the magnetic powder comprises at least one of aluminum-nickel-cobalt permanent magnet alloy powder, iron-cobalt permanent magnet alloy powder, permanent magnetic ferrite powder and rare earth permanent magnet powder; the binder comprises at least one of polyamide, chlorinated polyethylene, nitrile rubber, hydrogenated nitrile rubber, polyvinyl chloride, polyethylene, polypropylene, polyphenylene sulfide, epoxy resin, ethylene-vinyl acetate copolymer, ethylene acrylic acid copolymer, ethylene ethyl acrylate, thermoplastic elastomer, isoprene rubber, butyl rubber, chloroprene rubber, ethylene propylene diene monomer rubber, natural rubber, ethylene-vinyl acetate copolymer emulsion, propyl benzene emulsion, silicone-acrylic emulsion, pure acrylic emulsion, vinyl acetate-acrylic emulsion, polyurethane emulsion and silica gel.
4. The method of claim 1, wherein: also comprises adding auxiliary agent and mixing; the auxiliary agent comprises at least one of an antioxidant, a stabilizer, a lubricant, a coupling agent, an ultraviolet absorber, a dispersant, a defoaming agent, a thickening agent and a plasticizer.
5. The method of claim 1, wherein: the injection molding is carried out under the condition that the magnetic field intensity is 0T-3T.
6. The method of claim 1, wherein: the injection molding mode comprises at least one of axial orientation injection molding and interelectrode orientation injection molding.
7. The production method according to any one of claims 1 to 6, characterized in that: the shape of the positioning adsorption magnet comprises at least one of a circular ring, an arc, an ellipse and a rectangle.
8. A positioning adsorption magnet produced by the production method according to any one of claims 1 to 7.
9. A positioning and adsorbing assembly is characterized in that: comprising at least two positioning attracting magnets of claim 8, the two positioning attracting magnets having opposite poles.
10. Use of the positioning adsorption magnet of claim 8 in the fields of electronics, machinery, toys, packaging, home furnishing or aerospace.
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| CN202011448565.8A CN112712988A (en) | 2020-12-11 | 2020-12-11 | Positioning adsorption magnet and preparation method and application thereof |
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| CN202011448565.8A CN112712988A (en) | 2020-12-11 | 2020-12-11 | Positioning adsorption magnet and preparation method and application thereof |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61220315A (en) * | 1985-03-26 | 1986-09-30 | Japan Steel Works Ltd:The | Manufacture of magnetic molded body |
| JPH07220917A (en) * | 1994-02-02 | 1995-08-18 | Magufuain:Kk | Attraction magnet |
| JP2000150285A (en) * | 1998-11-05 | 2000-05-30 | Noboru Ito | Manufacture of attraction magnetic sheet |
| CN2681299Y (en) * | 2003-04-29 | 2005-02-23 | 户田工业株式会社 | Permanent magnet for sorption |
| CN201534370U (en) * | 2009-04-22 | 2010-07-28 | 邓崇岭 | Axially oriented die for large-scale ferrite plastic-magnetic product |
| CN102741954A (en) * | 2010-02-05 | 2012-10-17 | 日立金属株式会社 | Magnetic circuit for a non-contact charging device, power supply device, power receiving device, and non-contact charging device |
| CN105023707A (en) * | 2015-08-11 | 2015-11-04 | 深圳市新宜康科技有限公司 | Magnetic force attracting device |
| CN107599537A (en) * | 2017-08-15 | 2018-01-19 | 广州新莱福磁电有限公司 | High-damping plastic cement magnetic material and preparation method thereof |
| CN108172356A (en) * | 2018-01-30 | 2018-06-15 | 广州新莱福磁电有限公司 | A kind of double property magnetic materials and preparation method thereof |
| CN208570245U (en) * | 2018-07-09 | 2019-03-01 | 田莉 | A kind of composite magnetic joint strip |
-
2020
- 2020-12-11 CN CN202011448565.8A patent/CN112712988A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61220315A (en) * | 1985-03-26 | 1986-09-30 | Japan Steel Works Ltd:The | Manufacture of magnetic molded body |
| JPH07220917A (en) * | 1994-02-02 | 1995-08-18 | Magufuain:Kk | Attraction magnet |
| JP2000150285A (en) * | 1998-11-05 | 2000-05-30 | Noboru Ito | Manufacture of attraction magnetic sheet |
| CN2681299Y (en) * | 2003-04-29 | 2005-02-23 | 户田工业株式会社 | Permanent magnet for sorption |
| CN201534370U (en) * | 2009-04-22 | 2010-07-28 | 邓崇岭 | Axially oriented die for large-scale ferrite plastic-magnetic product |
| CN102741954A (en) * | 2010-02-05 | 2012-10-17 | 日立金属株式会社 | Magnetic circuit for a non-contact charging device, power supply device, power receiving device, and non-contact charging device |
| CN105023707A (en) * | 2015-08-11 | 2015-11-04 | 深圳市新宜康科技有限公司 | Magnetic force attracting device |
| CN107599537A (en) * | 2017-08-15 | 2018-01-19 | 广州新莱福磁电有限公司 | High-damping plastic cement magnetic material and preparation method thereof |
| CN108172356A (en) * | 2018-01-30 | 2018-06-15 | 广州新莱福磁电有限公司 | A kind of double property magnetic materials and preparation method thereof |
| CN208570245U (en) * | 2018-07-09 | 2019-03-01 | 田莉 | A kind of composite magnetic joint strip |
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Application publication date: 20210427 |