CN102324812B - Method for manufacturing plastic bonded permanent magnet rotor with buffering layer - Google Patents
Method for manufacturing plastic bonded permanent magnet rotor with buffering layer Download PDFInfo
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- CN102324812B CN102324812B CN2011101808036A CN201110180803A CN102324812B CN 102324812 B CN102324812 B CN 102324812B CN 2011101808036 A CN2011101808036 A CN 2011101808036A CN 201110180803 A CN201110180803 A CN 201110180803A CN 102324812 B CN102324812 B CN 102324812B
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- 229920003023 plastic Polymers 0.000 title claims abstract 9
- 239000004033 plastic Substances 0.000 title claims abstract 9
- 238000004519 manufacturing process Methods 0.000 title claims abstract 5
- 238000000034 method Methods 0.000 title claims abstract 5
- 230000003139 buffering effect Effects 0.000 title 1
- 238000001746 injection moulding Methods 0.000 claims abstract 10
- 238000002360 preparation method Methods 0.000 claims abstract 10
- 229910052751 metal Inorganic materials 0.000 claims abstract 9
- 239000002184 metal Substances 0.000 claims abstract 9
- 238000000465 moulding Methods 0.000 claims abstract 6
- 239000011265 semifinished product Substances 0.000 claims abstract 4
- 239000000047 product Substances 0.000 claims abstract 3
- -1 polyoxymethylene Polymers 0.000 claims 9
- 238000002347 injection Methods 0.000 claims 8
- 239000007924 injection Substances 0.000 claims 8
- 238000001816 cooling Methods 0.000 claims 6
- 239000006247 magnetic powder Substances 0.000 claims 6
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 claims 2
- 229920000106 Liquid crystal polymer Polymers 0.000 claims 2
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 claims 2
- 229920000571 Nylon 11 Polymers 0.000 claims 2
- 229920000299 Nylon 12 Polymers 0.000 claims 2
- 229920003189 Nylon 4,6 Polymers 0.000 claims 2
- 229920002292 Nylon 6 Polymers 0.000 claims 2
- 229920000305 Nylon 6,10 Polymers 0.000 claims 2
- 229920002302 Nylon 6,6 Polymers 0.000 claims 2
- 229920000572 Nylon 6/12 Polymers 0.000 claims 2
- 229930040373 Paraformaldehyde Natural products 0.000 claims 2
- 239000004698 Polyethylene Substances 0.000 claims 2
- 239000004743 Polypropylene Substances 0.000 claims 2
- 229920010524 Syndiotactic polystyrene Polymers 0.000 claims 2
- 239000003822 epoxy resin Substances 0.000 claims 2
- 239000005038 ethylene vinyl acetate Substances 0.000 claims 2
- 239000000463 material Substances 0.000 claims 2
- 229920001568 phenolic resin Polymers 0.000 claims 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims 2
- 229920000515 polycarbonate Polymers 0.000 claims 2
- 239000004417 polycarbonate Substances 0.000 claims 2
- 229920000647 polyepoxide Polymers 0.000 claims 2
- 229920000728 polyester Polymers 0.000 claims 2
- 229920000573 polyethylene Polymers 0.000 claims 2
- 229920006324 polyoxymethylene Polymers 0.000 claims 2
- 229920001155 polypropylene Polymers 0.000 claims 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims 2
- 239000004800 polyvinyl chloride Substances 0.000 claims 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims 2
- 229920005989 resin Polymers 0.000 claims 2
- 239000011347 resin Substances 0.000 claims 2
- PFRGGOIBYLYVKM-UHFFFAOYSA-N 15alpha-hydroxylup-20(29)-en-3-one Natural products CC(=C)C1CCC2(C)CC(O)C3(C)C(CCC4C5(C)CCC(=O)C(C)(C)C5CCC34C)C12 PFRGGOIBYLYVKM-UHFFFAOYSA-N 0.000 claims 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229920000049 Carbon (fiber) Polymers 0.000 claims 1
- 229920000265 Polyparaphenylene Polymers 0.000 claims 1
- 239000004734 Polyphenylene sulfide Substances 0.000 claims 1
- SOKRNBGSNZXYIO-UHFFFAOYSA-N Resinone Natural products CC(=C)C1CCC2(C)C(O)CC3(C)C(CCC4C5(C)CCC(=O)C(C)(C)C5CCC34C)C12 SOKRNBGSNZXYIO-UHFFFAOYSA-N 0.000 claims 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims 1
- PRQMIVBGRIUJHV-UHFFFAOYSA-N [N].[Fe].[Sm] Chemical compound [N].[Fe].[Sm] PRQMIVBGRIUJHV-UHFFFAOYSA-N 0.000 claims 1
- 229910000828 alnico Inorganic materials 0.000 claims 1
- 239000004760 aramid Substances 0.000 claims 1
- 229920006231 aramid fiber Polymers 0.000 claims 1
- 239000004917 carbon fiber Substances 0.000 claims 1
- 239000011852 carbon nanoparticle Substances 0.000 claims 1
- 239000002041 carbon nanotube Substances 0.000 claims 1
- 229910021393 carbon nanotube Inorganic materials 0.000 claims 1
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 claims 1
- 239000005007 epoxy-phenolic resin Substances 0.000 claims 1
- 239000003365 glass fiber Substances 0.000 claims 1
- 230000001788 irregular Effects 0.000 claims 1
- 229910001172 neodymium magnet Inorganic materials 0.000 claims 1
- 239000005011 phenolic resin Substances 0.000 claims 1
- 239000002861 polymer material Substances 0.000 claims 1
- 229920000069 polyphenylene sulfide Polymers 0.000 claims 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims 1
- 150000003568 thioethers Chemical class 0.000 claims 1
- 229910000859 α-Fe Inorganic materials 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
本发明公开了一种具有缓冲层的塑料粘结磁体永磁转子的制备方法，属于永磁转子领域。其技术方案为：其中，塑料粘结磁体永磁转子包括金属轴和粘结磁体，金属轴和粘结磁体之间设置有缓冲层；制备方法包括以下步骤：步骤一：将缓冲层采用模压或注塑的方式成型加工到金属轴的外侧形成半成品；步骤二：将粘结磁体经注塑或模压的方法成型加工到缓冲层的外侧形成成品。本发明的有益效果是：制备方法无需改变现有的生产工艺和生产设备即可生产本发明设计的带缓冲层的塑料粘结磁体永磁转子，易于工业化；制备得到的塑料粘结磁体永磁转子，通过设置缓冲层结构，能够有效避免塑料粘结磁体永磁转子在成型加工过程中或使用过程中产生裂纹；同时降低成本。
The invention discloses a preparation method of a plastic bonded magnet permanent magnet rotor with a buffer layer, belonging to the field of permanent magnet rotors. The technical solution is as follows: wherein, the plastic bonded magnet permanent magnet rotor includes a metal shaft and a bonded magnet, and a buffer layer is arranged between the metal shaft and the bonded magnet; the preparation method includes the following steps: Step 1: The buffer layer is molded or Forming and processing the outer side of the metal shaft by injection molding to form a semi-finished product; Step 2: molding and processing the bonded magnet to the outer side of the buffer layer by injection molding or molding to form a finished product. The beneficial effects of the present invention are: the preparation method can produce the plastic bonded magnet permanent magnet rotor with a buffer layer designed by the present invention without changing the existing production process and production equipment, which is easy to industrialize; the prepared plastic bonded magnet permanent magnet For the rotor, by setting the buffer layer structure, it is possible to effectively avoid cracks of the plastic bonded magnet permanent magnet rotor during the forming process or the use process; at the same time, the cost is reduced.
Description
Technical field
The present invention relates to the p-m rotor technical field, particularly have the preparation method of the plastic bonded magnets p-m rotor of resilient coating.
Background technology
In recent years, digital information technology and the automatic technology take office automation, home automation and industrial automation (3A) as representative have become one of new and high technology focus that promotes modern social development.Because magnetic signal is easy to store and digitlization, signal acquisition process is without advantages such as physics contacts, and magnetic material has become the important foundation material in the modern high technology field.Traditional permanent magnet normally forms by technique manufacturings such as casting and sintering, because its good magnetic property obtains to apply widely.But traditional permanent magnet hardness is high, fragility large, poor in processability, be difficult to make the product complex-shaped, that structure is meticulous, thereby limited the practical application of permanent magnet, far can not meet the particularly high-tech growth requirement such as Hyundai Motor electronic technology of modern technologies.Therefore, novel plastic bonded magnets just arises at the historic moment.
Plastic-bonded magnet is that the plastic substrate that processing characteristics is good, density is lower is mixed with magnetic, adopts suitable forming method, according to the permanent magnetic material with various shapes and performance of demand preparation.The component of plastic bonded magnets mainly comprises magnetic, binding agent and various auxiliary agent.Polymeric matrix adopts polyamide (PA) polyphenylene sulfide (PPS) and liquid crystal polymer etc. usually.Most important magnetic fillers comprises ferrite (SrFeO, BaFeO) and the rare earth permanent-magnet powder take neodymium iron boron (NdFeB) and SmCo (SmCo) etc. as representative.The auxiliary agent such as coupling agent and lubricant can improve mechanical performance and the magnetic property of plastic-bonded magnet when improving processing characteristics.
Compare with traditional permanent magnet, the plastic bonded magnets relative density is low, and easily machine-shaping becomes dimensional accuracy height and complex-shaped goods, and Magnetic Field Design is flexible; Simultaneously the mechanical performance of plastic bonded magnets for example obviously improve by intensity and elasticity.In view of the outstanding feature at technology and economic aspect, the share of plastic bonded magnets in permanent magnetic material market is more and more higher, and growth rate is considerably beyond traditional magnet.
By the magnetic device of plastic-bonded magnet preparation in sensing technology (the ABS system in automobile, be used as various positions, rotating speed and angular transducer in air bag, seat adjustment System, central control system) and drive system (the magnetic roller in laser printer is used for the p-m rotor of the various micromachines of automatically controlling etc.) in be widely used.It is multipole magnetized and the distributing very evenly of Surface field that transducer and micromachine permanent magnetism all require magnetic device.When moulding, multipole magnetized process occurs to be orientated and to complete under the effect of the magnetic fillers particle many magnetic pole and magnetic fields in die cavity in the plastic-bonded magnet melt.The orientation of magnetic particle makes a significant impact with one side each hierarchical structure on plastic substrate that distributes, can cause on the other hand the inner thermal conductivity generation of melt larger difference, thereby cause the complicated of melt cools, and then the various performances of sample especially uniformity and dimensional stability are exerted an influence.Usually the production of p-m rotor directly realizes one-step shaping by method and the metal shaft of injection or mold pressing with plastic-bonded magnet, has namely saved assembling process and has been conducive to again improve assembly precision and assembling intensity.But the percent thermal shrinkage of plastic-bonded magnet will be much larger than metal shaft, and the fragility of plastic-bonded magnet is larger, and p-m rotor is easy in cooling procedure after injection moulding and cracks in use procedure.Because the toughness of nylon 12 is better than nylon 6, p-m rotor by nylon 12 bonded permanent magnet preparations is difficult for cracking in injection moulding and use procedure, the p-m rotor of nylon 6 bonded permanent magnet preparations is easy to crack, thereby p-m rotor often uses the higher nylon 12(PA12 of price) etc. material do basis material, and can not use that price is lower, heat resistance and the better nylon 6(PA6 of other combination properties), cause the material cost of p-m rotor high, this is also one of problem in the urgent need to address in actual production.In addition, the applications such as auto industry, this means and will use higher magnetic loading and high-temperature resistance plastice, thereby aggravated the possibility that p-m rotor cracks constantly proposing higher requirement aspect magnetic property and heat resistance plastic-bonded magnet.
In realizing process of the present invention, the inventor finds that there is following problem at least in prior art: due to the percent thermal shrinkage of the plastic bonded magnets percent thermal shrinkage much larger than metal shaft, and the fragility of plastic bonded magnets is larger, and p-m rotor is easily cracked in processing and use procedure; In order to reduce in processing and use procedure and to crack as far as possible, can only adopt the higher PA12 of price to do basis material, cause the material cost of p-m rotor high; The applications such as auto industry are constantly proposing higher requirement to plastic-bonded magnet aspect magnetic property and heat resistance, can only use higher magnetic loading and high-temperature resistance plastice to reach related request, and this kind mode has been aggravated the possibility that p-m rotor cracks as far as possible.
Summary of the invention
The embodiment of the present invention provides a kind of preparation method with plastic bonded magnets p-m rotor of resilient coating, the described plastic bonded magnets p-m rotor with resilient coating for preparing, can improve in the plastic bonded magnets p-m rotor processing that causes because of the percent thermal shrinkage difference and use procedure and crack, the material cost of reduction p-m rotor.
In order to realize the foregoing invention purpose, the technical scheme of the embodiment of the present invention is as follows:
Preparation method with plastic bonded magnets p-m rotor of resilient coating, wherein, described plastic bonded magnets p-m rotor comprises metal shaft and bonded permanent magnet, is provided with resilient coating between described metal shaft and described bonded permanent magnet;
Described preparation method comprises the following steps:
Step 1: the semi-finished product mould that described metal shaft is placed in preheating, then described resilient coating is adopted the outside of the mode processing and forming of mold pressing or injection moulding to described metal shaft, be cooled to after described resilient coating moulding after design temperature or cooling certain hour to take out in described semi-finished product mould and form semi-finished product;
Step 2: the finished product mould that the semi-finished product of described step 1 is placed in the production magnet rotor of preheating, described bonded permanent magnet is arrived the outside of described resilient coating through the method processing and forming of injection moulding or mold pressing, die sinking after certain hour under described finished product mold temperature, sampling, thus whole forming process completed.
In described step 1, the preheat temperature of described semi-finished product mould is 30
oC ~ 150
oC； Be preferably 70
oC ~ 150
oC。
In described step 1, with described resilient coating 60
oC ~ 180
oDrying at least 1 under C ~ 6 hour are worked into the outside of described metal shaft by injection molding machine injection moulding, injection temperature is 160
oC ~ 340
oC, injection rate is 20mm/s ~ 200 mm/s, die sinking and semi-finished product are taken out after cooling 5 ~ 30 seconds; Said process can also be preferably: in described step 1, with described resilient coating 70
oC ~ 120
oDrying at least 3 under C ~ 5 hour are worked into the outside of described metal shaft by injection molding machine injection moulding, injection temperature is 220
oC ~ 350
oC, injection rate is 70mm/s ~ 100 mm/s, die sinking and semi-finished product are taken out after cooling 7 ~ 15 seconds.
In described step 2, the preheat temperature of described finished product mould is 30
oC ~ 150
oC； Be preferably 80
oC ~ 140
oC。
In described step 2, described bonded permanent magnet drying at least 3 ~ 5 hour under 60 ℃ ~ 180 ℃ are worked into the outside of described resilient coating by injection molding machine injection moulding, injection temperature is 160 ℃ ~ 340
oC, injection rate 20mm/s ~ 200 mm/s, die sinking after cooling 5 ~ 30 seconds, taking-up goods, complete production process; Said process can also be preferably: in described step 2, described bonded permanent magnet drying at least 3 ~ 5 hour under 80 ℃ ~ 110 ℃ are worked into the outside of described resilient coating by injection molding machine injection moulding, injection temperature is 260 ℃ ~ 340
oC, injection rate 50mm/s ~ 70 mm/s, die sinking after cooling 8 ~ 12 seconds, taking-up goods, complete production process.
Described step 1 and described step 2 were completed by two one steps of component plastic injection molding machine, were about to described metal shaft and were placed in two component injection molds of preheating, and the preheat temperature of mould is 30
oC ~ 150
oC, behind drying 3 ~ 5 hour be respectively put into resilient coating and viscosity magnet in two screw rods of two component injection molding machines at least under 60 ℃ ~ 180 ℃; At first the described resilient coating of injection moulding, injection temperature is 160
oC ~ 340
oC, injection rate is 20mm/s ~ 200 mm/s, uses another injection screw injection binding magnet after cooling 5 ~ 30 seconds, injection temperature is 160 ℃ ~ 340
oC, injection rate is 20mm/s ~ 200 mm/s, die sinking after cooling 5 ~ 30 seconds, taking-up goods, complete production process; Said process can also be preferably: described step 1 and described step 2 were completed by two one steps of component plastic injection molding machine, were about to described metal shaft and were placed in two component injection molds of preheating, and the preheat temperature of mould is 80
oC ~ 140
oC, behind drying 3 ~ 5 hour be respectively put into resilient coating and viscosity magnet in two screw rods of two component injection molding machines at least under 80 ℃ ~ 120 ℃; At first the described resilient coating of injection moulding, injection temperature is 220
oC ~ 350
oC, injection rate is 70mm/s ~ 100 mm/s, rotates afterwards two component injection molds and uses another injection screw injection binding magnet in cooling 7 ~ 15 seconds, the injection temperature injection temperature is 260 ℃ ~ 340
oC, injection rate is 50mm/s ~ 70 mm/s, die sinking after cooling 8 ~ 12 seconds, taking-up goods, complete production process.。
Described resilient coating is the high-ductility polymer material.
Described cushioning layer material is one or more in nylon 6, nylon 66, nylon 12, NYLON610, nylon 11, nylon 46, nylon 612, polyphenylene sulfide, polyester, Merlon, syndiotactic polystyrene, polyformaldehyde, polytetrafluoroethylene, liquid crystal polymer, polypropylene, polyethylene, polyvinyl chloride, ethylene-vinyl acetate copolymer, epoxy resin or phenolic resins, perhaps one or more modified products through glass fibre, carbon fiber, aramid fiber, carbon nano-tube, nano particle or other packing strengthening agents in above-mentioned resin.。
9, according to claim 1-6 arbitrary described preparation methods, it is characterized in that, the basis material of described bonded permanent magnet is one or more in nylon 6, nylon 66, nylon 12, NYLON610, nylon 11, nylon 46, nylon 612, polyphenylene sulfide, polyester, Merlon, syndiotactic polystyrene, polyformaldehyde, polytetrafluoroethylene, liquid crystal polymer, polypropylene, polyethylene, polyvinyl chloride, ethylene-vinyl acetate copolymer, epoxy resin or phenolic resins; The magnetic of described bonded permanent magnet is one or more in ferromagnetic oxide powder, NdFeB magnetic powder, samarium-cobalt magnetic powder, aluminium-nickel-cobalt magnetic powder or samarium iron nitrogen magnetic.Above-mentioned ferromagnetic oxide powder, NdFeB magnetic powder, samarium-cobalt magnetic powder, aluminium-nickel-cobalt magnetic powder and samarium iron nitrogen magnetic can be namely magnetic isotropy can be also magnetic anisotropy.In addition, can also add various processing aids and coupling agent to improve the performance of plastic bonded magnets.
The cross section of described resilient coating is circle, triangle, rectangle, square, other polygons or other are irregularly shaped.
the beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is: the preparation method need not to change existing production technology and production equipment gets final product the p-m rotor of the plastic bonded magnets with resilient coating of production the present invention design, thereby is easy to industrialization, the plastic bonded magnets p-m rotor for preparing, by buffer layer structure is set, the crackle that can avoid the plastic bonded magnets p-m rotor to produce due to thermal expansion coefficient difference between the bonded permanent magnet of fragility and metal shaft in molding process, while particularly adopting the high-ductility polymer material as resilient coating, because the Toughness Ratio plastic-bonded magnet of resilient coating is high a lot, can eliminate due to the internal stress that produces because thermal coefficient of expansion is different between metal shaft and plastic-bonded magnet, thereby the generation of Crack prevention, qualification rate and the processing characteristics of product have been improved, simultaneously, can obviously improve or avoid the plastic bonded magnets p-m rotor in use because the external conditions such as temperature, humidity constantly change the crackle that produces, greatly improve the useful life of product, thereby improve the safety and reliability of whole product, the resilient coating that adopts is positioned at the centre of p-m rotor, to the magnetic property of p-m rotor without any harmful effect, and because resilient coating has solved the crack problem of p-m rotor in processing and use procedure, thereby can adopt lower and better nylon 6 of the combination properties such as physical and mechanical properties and temperature tolerance of price etc. as basis material, and needn't adopt the higher nylon of price 12 when preparing p-m rotor, in addition, because resilient coating is pure plastics or reinforced plastics, the density ratio bonded permanent magnet is much lower, thereby can reduce the quality of plastic bonding p-m rotor and can improve its mechanical performance, thereby realizes lightweight, high performance and reduce costs, while adopting two component plastic injection molding machine, can realize one step processing by two component injection mouldings and insert injection moulding technology, greatly enhance productivity.
Description of drawings
Fig. 1 is that the overall structure master of the p-m rotor of the embodiment of the present invention looks cutaway view;
Fig. 2 is the overall structure end view of the p-m rotor of the embodiment of the present invention.
Embodiment
the embodiment of the present invention is the preparation method with plastic bonded magnets p-m rotor of resilient coating, and prepare a high-quality product, need that enough bonding strengths are arranged between the interior adjacent two parts of product, the p-m rotor of embodiment of the present invention preparation is by metal shaft, three layers of resilient coating and bonded permanent magnets form and are different materials, therefore in order to guarantee between metal shaft and resilient coating, and have enough bonding strengths between resilient coating and bonded permanent magnet, need suitable material to select to cooperatively interact with corresponding machined parameters, for making purpose of the present invention, technical scheme and advantage are clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Embodiment 1
Preparation method with plastic bonded magnets p-m rotor of resilient coating, plastic bonded magnets p-m rotor wherein comprises metal shaft 3 and bonded permanent magnet 1, is provided with resilient coating 2 between metal shaft 3 and bonded permanent magnet 1;
Bonded permanent magnet 1 is selected nylon 12 bonding strontium ferrites, and resilient coating 2 is selected nylon 12; Resilient coating 2 cross sections are circular;
Its preparation method is:
Step 1: metal shaft 3 is placed in mould, 80 ℃ of mold temperatures, with nylon 12 under 80 ℃ drying at least 4 hours by injection molding machine injection moulding resilient coating 2, become semi-finished product, 240 ℃ of injection temperatures, injection rate 80mm/s, die sinking and semi-finished product are taken out after cooling 10 seconds;
Step 2: above-mentioned semi-finished product are placed in the p-m rotor mould, 80 ℃ of mold temperatures, with above-mentioned nylon 12 bonding strontium ferrites under 80 ℃ at least dry 4 hours by injection molding machine injection binding magnet part, 280 ℃ of injection temperatures, injection rate 60mm/s, die sinking after cooling 10 seconds, taking-up goods, complete production process.
Embodiment 2
Preparation method with plastic bonded magnets p-m rotor of resilient coating, plastic bonded magnets p-m rotor wherein comprises metal shaft 3 and bonded permanent magnet 1, is provided with resilient coating 2 between metal shaft 3 and bonded permanent magnet 1;
Bonded permanent magnet 1 is selected nylon 6 bonding strontium ferrites, and resilient coating 2 is selected nylon 6; Resilient coating 2 cross sections are circular;
Its preparation method is:
Step 1: metal shaft 3 is placed in mould, 80 ℃ of mold temperatures, with nylon 6 under 80 ℃ drying at least 4 hours by injection molding machine injection moulding resilient coating 2, become semi-finished product, 240 ℃ of injection temperatures, injection rate 80mm/s, die sinking and semi-finished product are taken out after cooling 10 seconds;
Step 2: above-mentioned semi-finished product are placed in the p-m rotor mould, 80 ℃ of mold temperatures, with above-mentioned nylon 6 bonding strontium ferrites under 80 ℃ at least dry 4 hours by injection molding machine injection binding magnet part, 285 ℃ of injection temperatures, injection rate 60mm/s, die sinking after cooling 10 seconds, taking-up goods, complete production process.
Embodiment 3
Preparation method with plastic bonded magnets p-m rotor of resilient coating, plastic bonded magnets p-m rotor wherein comprises metal shaft 3 and bonded permanent magnet 1, is provided with resilient coating 2 between metal shaft 3 and bonded permanent magnet 1;
The polyphenylene sulfide bonding strontium ferrite of bonded permanent magnet 1, resilient coating 2 is selected polyphenylene sulfide; Resilient coating 2 cross sections are circular;
Its preparation method is:
Step 1: metal shaft is placed in mould, 120 ℃ of mold temperatures, with polyphenylene sulfide under 100 ℃ drying at least 4 hours by injection molding machine injection moulding resilient coating 2, become semi-finished product, 320 ℃ of injection temperatures, injection rate 80mm/s, die sinking and semi-finished product are taken out after cooling 10 seconds;
Step 2: above-mentioned semi-finished product are placed in the p-m rotor mould, 120 ℃ of mold temperatures, with above-mentioned polyphenylene sulfide bonding strontium ferrite under 100 ℃ at least dry 4 hours by injection molding machine injection binding magnet part, 320 ℃ of injection temperatures, injection rate 60mm/s, die sinking after cooling 10 seconds, taking-up goods, complete production process.
Embodiment 4
Preparation method with plastic bonded magnets p-m rotor of resilient coating, plastic bonded magnets p-m rotor wherein comprises metal shaft 3 and bonded permanent magnet 1, is provided with resilient coating 2 between metal shaft 3 and bonded permanent magnet 1;
Bonded permanent magnet 1 is selected the polyphenylene sulfide Agglutinate neodymium-iron-boron, and resilient coating 2 is selected polyphenylene sulfide; Resilient coating 2 cross sections are circular;
Its preparation method is:
Metal shaft 3 is placed in two component injection molds, and 120 ℃ of mold temperatures, be respectively put into polyphenylene sulfide and polyphenylene sulfide bonding rubidium iron boron in two screw rods of two component injection molding machines at least after dry 4 hours under 100 ℃; At first the injection moulding resilient coating 2,320 ℃ of injection temperatures, injection rate 80mm/s, rotated afterwards two component injection molds and used another injection screw injection binding magnet 1,320 ℃ of injection temperatures, injection rate 60mm/s in cooling 7 seconds, die sinking after cooling 10 seconds, taking-up goods, complete production process.
Embodiment 5
Preparation method with plastic bonded magnets p-m rotor of resilient coating, plastic bonded magnets p-m rotor wherein comprises metal shaft 3 and bonded permanent magnet 1, is provided with resilient coating 2 between metal shaft 3 and bonded permanent magnet 1;
Bonded permanent magnet 1 is selected nylon 12 bonding SmCos, and resilient coating 2 is selected nylon 12; Resilient coating 2 cross sections are circular;
Its preparation method is:
Metal shaft 3 is placed in two component injection molds, and 80 ℃ of mold temperatures, be respectively put into above-mentioned nylon 12 and nylon 12 bonding SmCos in two screw rods of two component injection molding machines at least after dry 4 hours under 80 ℃; At first the described resilient coating of injection moulding, 240 ℃ of injection temperatures, injection rate 80mm/s, rotated afterwards two component injection molds and used another injection screw injection binding magnet, 280 ℃ of injection temperatures, injection rate 60mm/s in cooling 10 seconds, die sinking after cooling 10 seconds, taking-up goods, complete production process.
Embodiment 6
Preparation method with plastic bonded magnets p-m rotor of resilient coating, plastic bonded magnets p-m rotor wherein comprises metal shaft 3 and bonded permanent magnet 1, is provided with resilient coating 2 between metal shaft 3 and bonded permanent magnet 1;
Bonded permanent magnet 1 is selected nylon 6 bonding SmCos, and resilient coating 2 is selected nylon 6; Resilient coating 2 cross sections are circular;
Its preparation method is:
Metal shaft 3 is placed in two component injection molds, and 100 ℃ of mold temperatures, then be respectively put into above-mentioned nylon 6 and nylon 6 bonding SmCos in two screw rods of two component injection molding machines at least after dry 4 hours under 80 ℃; At first injection moulding resilient coating, 240 ℃ of injection temperatures, injection rate 80mm/s, rotated afterwards two component injection molds and used another injection screw injection binding magnet part, 290 ℃ of injection temperatures, injection rate 60mm/s in cooling 7 seconds, die sinking after cooling 10 seconds, taking-up goods, complete production process.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
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| CN2011101808036A CN102324812B (en) | 2011-06-30 | 2011-06-30 | Method for manufacturing plastic bonded permanent magnet rotor with buffering layer |
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|---|---|---|---|
| CN2011101808036A CN102324812B (en) | 2011-06-30 | 2011-06-30 | Method for manufacturing plastic bonded permanent magnet rotor with buffering layer |
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| KR101558777B1 (en) * | 2014-05-29 | 2015-10-07 | 현대자동차주식회사 | Apparatus for molding rotor of motor |
| CN107332404B (en) * | 2017-02-20 | 2019-02-01 | 德清恩乐电子有限公司 | The preparation method of motor internal rotor and the motor internal rotor prepared by this method |
| CN107986230B (en) * | 2017-12-07 | 2020-04-07 | 天津大学 | Preparation method of patterned bionic magnetic micro-nano robot |
| CN108494125B (en) * | 2018-03-09 | 2023-07-14 | 沈阳工业大学 | An outer rotor high-speed motor whose rotor is bound in layers with composite permanent magnet materials |
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| JP2543489Y2 (en) * | 1991-11-21 | 1997-08-06 | マブチモーター株式会社 | Rotor for rotating electric machine |
| JP2001327105A (en) * | 2000-05-17 | 2001-11-22 | Fujitsu General Ltd | Rotor of motor and its manufacturing method |
| CN101202486A (en) * | 2007-09-30 | 2008-06-18 | 许正民 | Method for making radial direction orientation permanent ferrite rotor |
| JP5231790B2 (en) * | 2007-11-20 | 2013-07-10 | 日本電産テクノモータ株式会社 | Motor rotor and motor |
| CN101364467A (en) * | 2008-06-12 | 2009-02-11 | 青岛科技大学 | A preparation method of ferrite bonded magnet with good processability |
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