CN109767905B - Magnet material hot press molding process - Google Patents
Magnet material hot press molding process Download PDFInfo
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- CN109767905B CN109767905B CN201811642989.0A CN201811642989A CN109767905B CN 109767905 B CN109767905 B CN 109767905B CN 201811642989 A CN201811642989 A CN 201811642989A CN 109767905 B CN109767905 B CN 109767905B
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- 239000000463 material Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000000465 moulding Methods 0.000 title claims description 15
- 239000006247 magnetic powder Substances 0.000 claims abstract description 90
- 239000011230 binding agent Substances 0.000 claims abstract description 56
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 34
- 238000003756 stirring Methods 0.000 claims abstract description 26
- 230000001070 adhesive effect Effects 0.000 claims abstract description 21
- 239000000853 adhesive Substances 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 27
- 238000000227 grinding Methods 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 239000000696 magnetic material Substances 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- -1 polydimethylsiloxane Polymers 0.000 claims description 8
- 229920000877 Melamine resin Polymers 0.000 claims description 7
- 235000021355 Stearic acid Nutrition 0.000 claims description 7
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 7
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 7
- 239000008117 stearic acid Substances 0.000 claims description 7
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 229920001903 high density polyethylene Polymers 0.000 claims description 6
- 239000004700 high-density polyethylene Substances 0.000 claims description 6
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 claims description 6
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 5
- QOHMWDJIBGVPIF-UHFFFAOYSA-N n',n'-diethylpropane-1,3-diamine Chemical compound CCN(CC)CCCN QOHMWDJIBGVPIF-UHFFFAOYSA-N 0.000 claims description 5
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical group [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 6
- 239000005543 nano-size silicon particle Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 235000004279 alanine Nutrition 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007850 degeneration Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920000555 poly(dimethylsilanediyl) polymer Polymers 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Manufacturing Cores, Coils, And Magnets (AREA)
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
Abstract
The invention relates to the technical field of magnet forming, and particularly discloses a hot-press forming process for a magnet material, which comprises the following steps: providing graphene powder, magnetic powder and a binder; providing a stirring device, and uniformly mixing and stirring the graphene powder, the magnetic powder and the binder by the stirring device to form magnetic powder; providing a forming die and a pressure device, wherein the forming die is provided with a heating part and a die cavity, the die cavity contains the magnetic powder processed by the stirring device, the heat emitted by the heating part is transferred to the magnetic powder in the die cavity to heat the magnetic powder, and the pressure device applies pressure to the magnetic powder heated by the heating part in the die cavity to enable the magnetic powder to be formed into the magnetic part; by utilizing the characteristics of the graphene, the magnetic energy product and the oxidation resistance of the magnet material are improved, the coercive force of the magnet material is improved, and the isotropy of the magnet material is ensured; the adhesive enhances the adhesive force of the magnet material, and the magnetic part is hot-pressed by using the forming die, so that the processing and manufacturing cost of the magnetic part is reduced.
Description
Technical Field
The invention relates to the technical field of magnet molding, and particularly discloses a hot press molding process for a magnet material.
Background
The magnet is one of the common basic accessories, the application field of the magnet is very wide, for example, the magnet is applied to a motor, a magnetic suspension, an electromagnet and the like, the magnet is mainly made of a magnetic part which is magnetized through a magnetizing machine, in the prior art, the magnetic part is mainly formed by sintering a magnetic material at a high temperature, then the magnetic part is cut and ground into a semi-finished product, and then the semi-finished product is magnetized through the magnetizing machine to form the magnet. The processing technology of the magnet is complicated, and the manufacturing cost is high. In addition, the magnetic energy product and the oxidation resistance of the existing magnetic material are relatively low, the coercive force is relatively weak, and the anisotropy of the magnetic material also has adverse effects on magnetization, so that the performance of the magnetic material is poor, and the increasingly strict requirements of the magnetic material cannot be met.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a hot press molding process for a magnet material, which utilizes the characteristics of graphene to improve the magnetic energy product and the oxidation resistance of the magnet material, improve the coercive force of the magnet material and ensure the isotropy of the magnet material; the adhesive enhances the adhesive force of the magnet material, and the magnetic part is hot-pressed by using the forming die, so that the processing and manufacturing cost of the magnetic part is reduced.
In order to achieve the above object, the present invention provides a hot press molding process for a magnet material, comprising the steps of:
providing graphene powder, magnetic powder and a binder;
providing a stirring device, wherein the stirring device is used for uniformly mixing and stirring the graphene powder, the magnetic powder and the binder to form magnetic powder;
the forming die is provided with a heating part and a die cavity, the die cavity is used for containing the magnetic powder processed by the stirring device, the heat emitted by the heating part is transferred to the magnetic powder in the die cavity to heat the magnetic powder, and the pressing device applies pressure to the magnetic powder heated by the heating part in the die cavity to enable the magnetic powder to be formed into the magnetic part.
Preferably, the heat emitted from the heat generating member is transferred to the magnetic powder in the mold cavity to raise the temperature of the magnetic powder to 150-1500 ℃.
Preferably, the heat emitted by the heating member is transferred to the magnetic powder in the mold cavity so that the temperature of the magnetic powder is raised to a reference temperature, the reference temperature is higher than the melting point of the binder, and the reference temperature is lower than the melting point of the graphene powder and the melting point of the magnetic powder.
Preferably, the forming mold comprises a fixed mold plate and a movable mold plate detachably connected with the fixed mold plate, the fixed mold plate and the movable mold plate are surrounded to form a mold cavity, the pressure applying device is provided with a power pump, and the power pump pumps the magnetic powder processed by the stirring device into the mold cavity and applies pressure to the magnetic powder in the mold cavity.
Preferably, the magnet material hot press molding process further includes the steps of:
and providing three grinding devices, and grinding the graphene material, the magnetic material and the binder material respectively by the three grinding devices to form graphene powder, magnetic powder and a binder.
Preferably, each of the grinding devices is provided with a first filter screen and a second filter screen, the aperture of the filtering hole of the first filter screen is smaller than that of the filtering hole of the second filter screen, and the materials leaked through the second filter screen and blocked by the first filter screen are conveyed to the stirring device.
Preferably, the particle size of the magnetic powder is the same as that of the graphene powder, and the particle size of the binder is smaller than that of the magnetic powder.
Preferably, the magnetic powder has a particle size of 3 to 5 μm.
Preferably, the binder has a particle size of 20-35 pm.
Preferably, the mass ratio of the graphene powder to the magnetic powder to the binder is (1-20): (70-95): (5-10).
Preferably, the binder is prepared from the following raw materials in parts by weight: 60-70 parts of bisphenol A epoxy resin, 7-12 parts of high-density polyethylene, 5-8 parts of melamine formaldehyde resin, 4-7 parts of fumed nano silica, 3-5 parts of polydimethylsiloxane, 3-5 parts of trimethylolethane, 3-5 parts of stearic acid and 2-4 parts of diethylaminopropylamine.
Preferably, the preparation method of the binder comprises the following steps: the components are uniformly mixed in a molten state according to a certain proportion to obtain a binder mixture, and then the binder mixture is processed to obtain the binder.
The binding agent has strong binding force with the magnetic powder and the graphene powder, is uniformly adhered, so that the magnetic part has excellent mechanical property and corrosion resistance, the machinability is good, the prepared product has uniform density distribution, is not easy to deform, is not easy to have the defects of corner material shortage, flow line generation and the like, has stable product quality, and is beneficial to reducing the processing and manufacturing cost of the magnetic part.
According to the invention, the bisphenol A epoxy resin 6, the high-density polyethylene and the melamine formaldehyde resin are matched to be used as matrix components, so that the prepared adhesive has good adhesive property and mechanical property, and the compatibility of the adhesive, magnetic powder and graphene powder can be improved by adding the gas-phase nano silicon dioxide, the polydimethylsilane, the trimethylolethane, the stearic acid and the diethylamino alanine, so that the dispersion effect of the adhesive is improved, the stability of a magnetic part is improved, the size precision of the material is improved, and the surface defects of the material are reduced.
The gas phase nano silicon dioxide has more surface micropores, has the advantages of large specific surface area, high surface hydroxyl content and the like, has good compatibility with other organic components in the binder, can be uniformly dispersed in the binder system, improves the water resistance and the bonding strength of the binder, and ensures that a magnetic part has good mechanical property. The stearic acid can reduce the friction between the whole system of the binder, the magnetic powder and the graphene powder and the inner surface of the die, is convenient for forming and demoulding, reduces the loss and reduces the cost. The melamine formaldehyde resin can connect copolymer molecules in a system to form a cross-linked network structure, can improve the adhesive force and the solvent resistance of the adhesive, improve the heat resistance, increase the cohesive strength and improve the adhesive property of the adhesive, and has excellent comprehensive performance.
Preferably, the magnetic powder is neodymium iron boron powder.
The invention has the beneficial effects that: by utilizing the characteristics of the graphene, the magnetic energy product and the oxidation resistance of the magnet material are improved, the coercive force of the magnet material is improved, and the isotropy of the magnet material is ensured; the adhesive enhances the adhesive force of the magnet material, and the magnetic part is hot-pressed by using the forming die, so that the processing and manufacturing cost of the magnetic part is reduced.
Drawings
FIG. 1 is a block diagram of the structural layout of the present invention.
The reference numerals include:
1-stirring device 2-forming die 3-pressure device
4-heating element 5-die cavity 6-grinding device.
Detailed Description
For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
Example 1
Referring to fig. 1, a hot press molding process for a magnet material according to the present invention includes the following steps:
providing graphene powder, magnetic powder and a binder;
providing a stirring device 1, conveying graphene powder, magnetic powder and a binder into the stirring device 1 according to a preset weight proportion by using an external conveying device in the using process, wherein the stirring device 1 is used for uniformly mixing and stirring the graphene powder, the magnetic powder and the binder to form magnetic powder;
providing a forming die 2 and a pressure device 3, wherein the forming die 2 is provided with a heating part 4 and a die cavity 5, the die cavity 5 is used for accommodating magnetic powder formed after the mixing and stirring treatment of the stirring device 1, the heat emitted by the heating part 4 is transferred to the magnetic powder in the die cavity 5 to heat the magnetic powder, and the pressure device 3 applies pressure to the magnetic powder heated by the heating part 4 in the die cavity 5 so that the magnetic powder is formed into the magnetic part through hot press forming.
The characteristics of graphene in the magnetic part are utilized, the magnetic energy product and the oxidation resistance of the magnet material are improved, the stronger magnetism of the magnet in unit volume made of the magnetic part is ensured, and the magnet made of the magnetic part is prevented from being oxidized by the external environment and being denatured; the coercive force of the magnet material is improved, the demagnetization rate of the magnet made of the magnetic part is delayed, and the stable performance of the magnetic size of the magnet is ensured; the isotropy of the magnet material is ensured, and the magnet with the required polarity can be easily magnetized by the magnetizer; the adhesive enhances the adhesive force of the magnet material, and reduces the probability that the magnet made of the magnetic part is loosened by external collision; the magnetic part is hot-formed by the forming die 2 at one time, the die cavity 5 with the required shape can be processed on the forming die 2 according to the required shape, the cutting and grinding processing of the magnetic part are not needed, the processing and forming procedures of the magnetic part are simplified, and the processing and manufacturing cost of the magnetic part is reduced.
The heat emitted by the heating element 4 is transferred to the magnetic powder in the die cavity 5, so that the temperature of the magnetic powder is raised to 150-1500 ℃; preferably, the heat generated by the heating element 4 is transferred to the magnetic powder in the die cavity 5 to raise the temperature of the magnetic powder to 500 ℃, so that the magnetic powder in the die cavity 5 is in a high-temperature state, the binder is fully melted and mixed in the magnetic powder, and the pressure state of the pressing device 3 is matched to ensure that the magnetic powder in the die cavity 5 forms a compact and firm magnetic element, thereby improving the density and the bonding strength of the magnetic element.
The heat transfer that generates heat 4 sent is so that the temperature of magnetic powder risees to reference temperature to the magnetic powder in die cavity 5, and reference temperature is greater than the melting point of binder, ensures that the binder can fully melt, and reference temperature is less than the melting point of graphite alkene powder and the melting point of magnetic powder, avoids graphite alkene powder, magnetic powder to influence the degeneration because of high temperature, under the prerequisite of guaranteeing magnetic member self intensity, ensures the performance of magnetic member.
The forming die 2 comprises a fixed die plate and a movable die plate detachably connected with the fixed die plate, the fixed die plate and the movable die plate are arranged in a surrounding mode to form a die cavity 5, the pressure applying device 3 is provided with a power pump, the power pump pumps the magnetic powder processed by the stirring device 1 into the die cavity 5 and applies pressure to the magnetic powder in the die cavity 5, and the magnetic powder in the die cavity 5 is ensured to be in a high-pressure state. Of course, the pressing device 3 may also be a vacuum pumping device, which performs vacuum pumping on the mold cavity 5, so as to ensure that the magnetic powder in the mold cavity 5 is in a high pressure state.
The hot press molding process of the magnet material further comprises the following steps:
the three grinding devices 6 are provided, the three grinding devices 6 grind the graphene material, the magnetic material and the adhesive material respectively to form graphene powder, magnetic powder and an adhesive, and output materials (namely the graphene powder, the magnetic powder and the adhesive) of the three grinding devices 6 are conveyed to the stirring device 1 through the output devices according to a preset weight proportion, so that automatic production of the magnetic material and automatic forming of the magnetic part are realized, the automation degree of magnet manufacturing is improved in an auxiliary mode, and the stability of magnet production quality is ensured.
Each grinding device 6 is provided with a first filter screen and a second filter screen, the aperture of the filtering hole of the first filter screen is smaller than that of the filtering hole of the second filter screen, the materials which leak out of the second filter screen and are blocked by the first filter screen are conveyed to the stirring device 1, the materials which exceed the preset particle size are filtered by the second filter screen, and the materials which exceed the preset particle size are prevented from reducing the bonding strength of the magnetic piece; materials with the particle size smaller than the preset particle size are filtered by the first filter screen, the influence of the materials with the particle size smaller than the preset particle size on the magnetic force of the magnetic part after magnetization is prevented, and the quality stability of the magnetic part is ensured.
The particle size of the magnetic powder is the same as that of the graphene powder, and the particle size of the binder is smaller than that of the magnetic powder, so that the binder particles are filled between gaps of the magnetic powder particles and the graphene powder particles, and the uniformity of the self bonding strength of the magnetic part is ensured.
Preferably, the particle size of the magnetic powder is 3-5 μm, the particle size of the binder is 20-35pm, and 1pm is 1 μm/1000, so that the circumference of each magnetic powder particle and each graphene powder particle is "surrounded" by a plurality of binder particles, thereby ensuring that the magnetic powder can be sufficiently and uniformly mixed, and simultaneously ensuring that the bonding strength of the magnetic member is maximized, and preventing the magnetic member from being easily broken.
In this embodiment, the magnetic powder is neodymium iron boron powder, and the magnet made of the magnetic member is a strong magnet.
Example 2
In this embodiment, the mass ratio of the graphene powder to the magnetic powder to the binder is 10: 80: 8.
in the embodiment, the binder is prepared from the following raw materials in parts by weight: 65 parts of bisphenol A epoxy resin, 9 parts of high-density polyethylene, 6 parts of melamine formaldehyde resin and 5 parts of fumed nano silicon dioxide. 4 parts of polydimethylsiloxane, 4 parts of trimethylolethane, 4 parts of stearic acid and 3 parts of diethylaminopropylamine.
The preparation method of the adhesive comprises the following steps: the components are uniformly mixed in a molten state according to a certain proportion to obtain a binder mixture, and then the binder mixture is processed to obtain the binder.
The rest of this embodiment is the same as embodiment 1, and will not be described herein again.
Example 3
In this embodiment, the mass ratio of the graphene powder to the magnetic powder to the binder is 1: 70: 5.
in the embodiment, the binder is prepared from the following raw materials in parts by weight: 60 parts of bisphenol A epoxy resin, 7-parts of high-density polyethylene, 5 parts of melamine formaldehyde resin, 4 parts of gas-phase nano silicon dioxide, 3 parts of polydimethylsiloxane, 3 parts of trimethylolethane, 3 parts of stearic acid and 2 parts of diethylaminopropylamine.
In this embodiment, the preparation method of the binder includes the following steps: the components are uniformly mixed in a molten state according to a certain proportion to obtain a binder mixture, and then the binder mixture is processed to obtain the binder.
The rest of this embodiment is the same as embodiment 1, and will not be described herein again.
Example 4
In this embodiment, the mass ratio of the graphene powder to the magnetic powder to the binder is 20: 95: 10.
in the embodiment, the binder is prepared from the following raw materials in parts by weight: 70 parts of bisphenol A epoxy resin, 12 parts of high-density polyethylene, 8 parts of melamine formaldehyde resin and 7 parts of fumed silica. 5 parts of polydimethylsiloxane, 5 parts of trimethylolethane, 5 parts of stearic acid and 4 parts of diethylaminopropylamine.
In this embodiment, the preparation method of the binder includes the following steps: the components are uniformly mixed in a molten state according to a certain proportion to obtain a binder mixture, and then the binder mixture is processed to obtain the binder.
The rest of this embodiment is the same as embodiment 1, and will not be described herein again.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (6)
1. A hot press molding process for a magnet material is characterized by comprising the following steps:
providing graphene powder, magnetic powder and a binder;
providing a stirring device, wherein the stirring device is used for uniformly mixing and stirring the graphene powder, the magnetic powder and the binder to form magnetic powder;
providing a forming die and a pressing device, wherein the forming die is provided with a heating part and a die cavity, the die cavity is used for accommodating the magnetic powder processed by the stirring device, the heat emitted by the heating part is transferred to the magnetic powder in the die cavity to heat the magnetic powder, and the pressing device applies pressure to the magnetic powder heated by the heating part in the die cavity to enable the magnetic powder to be formed into the magnetic part;
providing three grinding devices, and grinding the graphene material, the magnetic material and the binder material by the three grinding devices respectively to form graphene powder, magnetic powder and a binder;
each grinding device is provided with a first filter screen and a second filter screen, the aperture of the filtering hole of the first filter screen is smaller than that of the filtering hole of the second filter screen, and the materials leaked through the second filter screen and blocked by the first filter screen are conveyed to the stirring device;
the heat emitted by the heating part is transferred to the magnetic powder in the die cavity so that the temperature of the magnetic powder is raised to a reference temperature, the reference temperature is higher than the melting point of the binder, and the reference temperature is lower than the melting point of the graphene powder and the melting point of the magnetic powder;
the forming die comprises a fixed die plate and a movable die plate detachably connected with the fixed die plate, the fixed die plate and the movable die plate are enclosed to form a die cavity, the pressure applying device is provided with a power pump, and the power pump pumps the magnetic powder treated by the stirring device into the die cavity and applies pressure to the magnetic powder in the die cavity;
the particle size of the magnetic powder is the same as that of the graphene powder, and the particle size of the binder is smaller than that of the magnetic powder, so that the binder particles are filled between gaps of the magnetic powder particles and the graphene powder particles, and the uniformity of the self bonding strength of the magnetic part is ensured.
2. A hot press molding process for a magnet material according to claim 1, characterized in that: the heat emitted by the heating element is transferred to the magnetic powder in the mold cavity, so that the temperature of the magnetic powder is raised to 150-1500 ℃.
3. A hot press molding process for a magnet material according to claim 1, characterized in that: the mass ratio of the graphene powder to the magnetic powder to the binder is (1-20): (70-95): (5-10).
4. A hot press molding process for a magnet material according to claim 1, characterized in that: the magnetic powder is neodymium iron boron powder, and the particle size of the magnetic powder is 3-5 μm.
5. A hot press molding process for a magnet material according to claim 1, characterized in that: the particle size of the binder is 20-35 pm.
6. A hot press molding process for a magnet material according to claim 1, characterized in that: the adhesive is prepared from the following raw materials in parts by weight: 60-70 parts of bisphenol A epoxy resin, 7-12 parts of high-density polyethylene, 5-8 parts of melamine formaldehyde resin, 4-7 parts of fumed nano silica, 3-5 parts of polydimethylsiloxane, 3-5 parts of trimethylolethane, 3-5 parts of stearic acid and 2-4 parts of diethylaminopropylamine.
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| CN101593590A (en) * | 2009-04-10 | 2009-12-02 | 华中科技大学 | A kind of preparation method of warm compaction molding phenolic resin bonded Nd-Fe-B magnet |
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| CN104841927A (en) * | 2015-05-07 | 2015-08-19 | 昆山瑞仕莱斯高新材料科技有限公司 | Preparation method of high corrosion resistance and high weather resistance rare earth permanent magnetic material |
| CN206605830U (en) * | 2017-01-24 | 2017-11-03 | 河南雅利安新材料有限公司 | A kind of powder shaping press |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212714B (en) * | 2013-04-27 | 2015-04-22 | 安徽大地熊新材料股份有限公司 | Method for preparing neodymium iron boron material |
| CN105788790A (en) * | 2016-03-08 | 2016-07-20 | 佛山市程显科技有限公司 | Graphene-added material for material additive manufacturing magnetic core |
| CN105905421A (en) * | 2016-05-20 | 2016-08-31 | 成都德兴磁业有限公司 | Material charging box for bonding of neodymium iron boron magnet |
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2018
- 2018-12-29 CN CN201811642989.0A patent/CN109767905B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593590A (en) * | 2009-04-10 | 2009-12-02 | 华中科技大学 | A kind of preparation method of warm compaction molding phenolic resin bonded Nd-Fe-B magnet |
| CN202290552U (en) * | 2011-10-14 | 2012-07-04 | 桐乡市朗基电子材料有限公司 | Magnetic powder vibrating screen |
| CN104841927A (en) * | 2015-05-07 | 2015-08-19 | 昆山瑞仕莱斯高新材料科技有限公司 | Preparation method of high corrosion resistance and high weather resistance rare earth permanent magnetic material |
| CN206605830U (en) * | 2017-01-24 | 2017-11-03 | 河南雅利安新材料有限公司 | A kind of powder shaping press |
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Effective date of registration: 20211224 Address after: 523000 Xiaohe Village Industrial Zone, Daojiao Town, Dongguan City, Guangdong Province Patentee after: JIN KUN MAGNET Co.,Ltd. Address before: 523000 Room 202, unit 2, building 20, jinghuwanpan, 28 Binhe Road, Xinji community, Nancheng District, Dongguan City, Guangdong Province Patentee before: Chen Liang |