CN102662075B - A kind of multi-pole magnetic plastic encoder and production technology thereof - Google Patents
A kind of multi-pole magnetic plastic encoder and production technology thereof Download PDFInfo
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- CN102662075B CN102662075B CN201210128522.0A CN201210128522A CN102662075B CN 102662075 B CN102662075 B CN 102662075B CN 201210128522 A CN201210128522 A CN 201210128522A CN 102662075 B CN102662075 B CN 102662075B
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Abstract
The invention discloses a kind of multi-pole magnetic plastic encoder, comprise magnetic plastics outer ring, iron frame inner ring and bonding sulphurated siliastic layer between the two.Owing to both containing thermoplastics in plastic outer ring, again containing a large amount of ferrite powder, therefore plastic outer ring not only had certain flexibility, also had excellent heatproof, weatherability; Middle level is bonding sulphurated siliastic, is bonded to as a whole after high temperature vulcanized, and its fastness is well more many than normal temperature embedding bonding silica gel; Inner ring is iron frame.Carry out magnetic by high precision magnetizing equipment, this multi-pole magnetic plastic encoder not only has stronger magnetic induction density, but also has the distribution of accurate magnetic pole.In actual applications, the serviceable life of Magnetic Field, stronger environmental suitability and excellence accurately can be provided.
Description
Technical field
The present invention relates to a kind of multi-pole magnetic plastic encoder and production technology thereof.
Background technology
The security of the vehicles is problems that everyone is concerned about most, particularly public transport, more will cause the concern of people.Therefore people are when development research or the update vehicles, and what stand in the breach is exactly safety guarantee, and magnetic plastics scrambler is exactly produce in this context.
Multi-pole magnetic plastic encoder is the velocity of rotation coordinating active sensor to collect wheel, instead of traditional phonic drum and passive sensor.That looks like to traffic safety along with people improves constantly, and no matter is the vehicles such as motor-car, subway or the car of running at high speed, and all needs the safe reliability improving and strengthen driving.Just because of this, some vehicle-mounted computer traffic safety operating systems are essential, and these operating systems need a very important parameter to assist---vehicle wheel rotational speed.How to collect the road speed of current accuracy, this needs sensor and the multi-pole magnetic plastic encoder of in wheel, installing an active, the north and south pole change information on those scramblers constantly rotated along with wheel walking is gathered by sensor, be that digital signal is transported in vehicle-mounted computer and goes these convert information, operating system is allowed to obtain accurate each faster rotating wheel, safety assistant control system, guarantee driving safety.
Summary of the invention
For prior art Problems existing, the object of the invention is to propose a kind of multi-pole magnetic plastic encoder and production technology thereof, the magnetic property of this multi-pole magnetic plastic encoder is excellent, interlaminar bonding is firm, Magnetic Field accurately can be provided in application process, there is stronger environmental suitability and excellent serviceable life.
For reaching this object, the present invention by the following technical solutions:
A kind of multi-pole magnetic plastic encoder, comprises magnetic plastics outer ring, iron frame inner ring and bonding sulphurated siliastic layer between the two.
Preferably, described magnetic plastics outer ring is the compound mixture of thermoplastics and ferrite powder.
Preferably, described thermoplastics is polypropylene, nylon 12, nylon 11, NYLON610, nylon66 fiber, poly-trifluoro-ethylene or polycarbonate.
Preferably, described ferrite powder is barium ferrite, strontium ferrite, SmCo ferrite, neodymium iron boron ferrite or other rare earth, iron oxysomes.
Preferably, the mass percent of described ferrite powder is 60% ~ 90%.
Preferably, described bonding sulphurated siliastic layer is that polysiloxane, hard carbon black and organic peroxide sulfuration form.
Preferably, described polysiloxane is dimethyl-silicon rubber (MQ), methyl ethylene silicon raw rubber (VMQ) or methyl phenyl vinyl silicon raw rubber (PVMQ).
Preferably, described hard carbon black is amorphous silicic acid and silicate, can be gel and the aerogel of precipitated silica, aerosil or superfine silicon dioxide.
Preferably, described organic peroxide can be benzoyl peroxide, 2,4-dichlorobenzoperoxides, cumyl peroxide, 2,5-dimethyl-2,5-di-t-butyl hexane peroxides.
Preferably, described iron frame inner ring is medium carbon steel.
A production technology for multi-pole magnetic plastic encoder, comprises following operation:
Step 1: the compound mixture under high temperature fused state by thermoplastics and ferrite powder, by obtaining feed particulate material after extruding pelletization, then makes plastic outer ring by extrusion shaping machine, stand-by.
Step 2: add amorphous silicic acid and silicate in polysiloxane, then mixing in the Banbury mixer of uniform temperature and pressure, mixing complete after the compound adhesive of acquisition silicon rubber and hard carbon black, organic peroxide in compound adhesive, by obtaining bonding vulcanizing silicone rubber composite after mill mixing dispersion, stand-by;
Step 3: select medium carbon steel blank, become iron frame inner ring stand-by by machine tooling.
Step 4: iron frame inner ring and plastic outer ring are assembled together, bonding vulcanizing silicone rubber composite according to the rules size cut into strip, panel vulcanizing press is warming up to suitable temperature, then open panel vulcanizing press and open mould simultaneously, first put into the assembly of iron frame inner ring and plastic outer ring, then put into rapidly bonding vulcanizing silicone rubber composite, close die, start panel vulcanizing press; Under the condition of high temperature, high pressure and certain hour, complete sulfuration combination, obtain sulfuration assembly;
Step 5: the sulfuration assembly completed is put on magnetizing equipment and adds magnetic, make the multi-pole magnetic plastic encoder of finished product.
Based on disclosing of above technical scheme, the present invention possesses following beneficial effect:
In the present invention, owing to both containing thermoplastics in plastic outer ring, again containing a large amount of ferrite powder, therefore plastic outer ring not only had certain flexibility, also had excellent heatproof, weatherability; Middle level is bonding sulphurated siliastic, is bonded to as a whole after high temperature vulcanized, and its fastness is well more many than normal temperature embedding bonding silica gel; Inner ring is iron frame.Carry out magnetic by high precision magnetizing equipment, this multi-pole magnetic plastic encoder not only has stronger magnetic induction density, but also has the distribution of accurate magnetic pole.In actual applications, the serviceable life of Magnetic Field, stronger environmental suitability and excellence accurately can be provided.
Embodiment
Technical scheme of the present invention is further illustrated by embodiment below in conjunction with accompanying drawing:
The present invention proposes a kind of multi-pole magnetic plastic encoder, comprise magnetic plastics outer ring, iron frame inner ring and bonding sulphurated siliastic layer between the two.
Plastic outer ring, is in thermoplastics, add a large amount of ferrite powder, is formed by shear extrusion granulation, and its characteristic has excellent magnetic and flexibility, and the heatproof of excellence, weatherability.Thermoplastics is a carrier, special restriction is not done to its material, can be plastics or rubber elastomer, preferred molten temperature and the higher thermoplastics of melting index herein, such as polypropylene, nylon 12, nylon 11, NYLON610, nylon66 fiber, poly-trifluoro-ethylene, polycarbonate etc.; And thermoplastics content in plastic outer ring is higher, then the magnetic property of plastic outer ring can be caused to decline, therefore, the mass percent of thermoplastics not higher than 50%, preferably lower than 20%.Ferrite powder mass percent in plastic outer ring is not less than 70%, and be preferably 60 ~ 90%, this ferrite powder is cohesiveness ferrite, can select barium ferrite, strontium ferrite, SmCo ferrite, neodymium iron boron ferrite etc.Preferred strontium ferrite and barium ferrite herein, relative to SmCo, neodymium iron boron or other rare earth, iron oxygen, much lower in price, its cost performance is higher.
In process of production, first, thermoplastics and cohesiveness ferrite powder are mixed, is uniformly dispersed as much as possible, then scattered potpourri is passed through extruding granulator melt pelletization, after resulting composition cooling, encapsulation is stand-by; It is plastic outer ring that composition stand-by for encapsulation is passed through extrusion molding machining, and shape is determined by extrusion die.Stand-by through last phase tidying up, inspection, storage after plastic seal ring cooling.
Bonding high-temperature silicon disulfide rubber layer, for polysiloxane, hard carbon black and organic peroxide sulfuration form, have good heat cure, its curing temperature must not higher than 180 DEG C; As a whole owing to being bonded to after high temperature vulcanized, its fastness is well more many than normal temperature embedding bonding silica gel.Wherein, polysiloxane, can select dimethyl-silicon rubber (MQ), methyl ethylene silicon raw rubber (VMQ) or methyl phenyl vinyl silicon raw rubber (PVMQ); Preferable methyl vinylsiloxane rubber herein, because a small amount of vinyl greatly can improve sulfurate activity, expands the range of choice of organic peroxide, improves ageing-resistant, physical strength and the compression set performance of vulcanizate.Hard carbon black is a kind of amorphous silicic acid and silicate, can be the gel and aerogel etc. of precipitated silica, aerosil or superfine silicon dioxide; Preferred precipitated silica herein, has excellent rebound resilience, compression set, anti-swelling and good processability, and low price, and sizing material is the advantage such as structuring not easily.Organic peroxide can be benzoyl peroxide, 2,4-dichlorobenzoperoxides, cumyl peroxide, 2,5-dimethyl-2,5-di-t-butyl hexane peroxides etc.; Preferred 2,5-dimethyl-2,5-di-t-butyl hexane peroxides herein, because it is active large, non-volatile under normal temperature, the volatility of decomposition product is large, can shorten the post vulcanization time.
In process of production, mixing apparatus adopts kneader or other high-speed mixers, polysiloxane and amorphous silicic acid and silicate are joined in bonding agent, in this step, temperature can be risen to 120 DEG C if necessary, accelerate the compound of polysiloxane and hard carbon black, be more conducive to the combination dispersion of two kinds of materials; Also methyl-silicone oil or vinyl silicone oil can be added for regulating viscosity and structure control etc.; Then gained potpourri is cooled to less than 40 DEG C, now adds organic peroxide, this step need not heat up, and mediates under state of nature, finally packed for standby use after gains cooling.
Irony circular framework, range of choices is comparatively wide, can select medium carbon steel, herein the steel of preferably 45 steel or other types.According to the specification of scrambler, according to drawing outward appearance and dimensional requirement, use numerically-controlled machine to carry out cutting finish-milling to irony blank, then it is carried out to the detection of size and outward appearance, qualified rear encapsulation is stand-by.
Complete above-mentioned plastic outer ring, after the production of iron frame inner ring and bonding sulphurated siliastic layer between the two, enter the assembly production of multi-pole magnetic plastic encoder: first panel vulcanizing press will be warming up to 120 ~ 170 DEG C, this problem can be determined according to organic peroxide difference, interior ring framework and magnetic plastics outer ring are assembled together simultaneously, middle level cementing compositions according to the rules size cut into strip, then vulcanizing press is opened, open mould simultaneously, first put into the assembly of ring framework and outer ring magnetic plastics, then middle level cementing compositions is put into rapidly, close die, start vulcanizing press, under the condition of high temperature, high pressure and certain hour, just can complete sulfuration combination step, obtain sulfuration assembly.
The sulfuration assembly completed is put on magnetizing equipment and adds magnetic, make the multi-pole magnetic plastic encoder of finished product, need in this step to use high-accuracy magnetizing equipment and checkout equipment.Sulfuration assembly obtained above is placed in the fixture of high-accuracy magnetizing equipment, starts the button that magnetizes, in about 5 seconds, half-finished process that magnetizes can be completed.Completing the product that magnetizes through high-accuracy checkout equipment, detection validation being carried out to its magnetic property, filters out underproof product, qualified product be we invent the multi-pole magnetic plastic encoder produced.
Based on above-mentioned multi-pole magnetic plastic encoder, the invention allows for a kind of production technology of multi-pole magnetic plastic encoder, comprise the following steps:
Step 1: by strontium ferrite powder compound mixture under high temperature fused state of the nylon66 fiber of 100 mass parts and 500 mass parts, by obtaining feed particulate material after extruding pelletization.Then make plastic outer ring by extrusion shaping machine, after cooling arranges, encapsulation is stand-by.
Step 2: weigh each material according to the proportioning of adding 50 mass parts precipitated silica powders in 100 mass parts polysiloxane, then mediate mixing in the Banbury mixer of uniform temperature and pressure, mixing complete after the compound adhesive of acquisition silicon rubber and hard carbon black, (e) 2 that 150 grams are added 0.7 gram is got from compound adhesive, 5-dimethyl-2,5-di-t-butyl hexane peroxide, by obtaining bonding vulcanising composition after mill mixing dispersion, encapsulates stand-by.
Step 3: select 45 suitable steel billet material, referenced drawing requires to become irony inner ring by machine tooling, stand-by after packaging.
Step 4: panel vulcanizing press will be warming up to 165 DEG C, interior ring framework and magnetic plastics outer ring are assembled together, middle level cementing compositions according to the rules size cut into strip, then panel vulcanizing press is opened, open mould simultaneously, first put into the assembly of ring framework and outer ring magnetic plastics, then put into rapidly middle level cementing compositions, close die, start panel vulcanizing press.Under the condition of high temperature, high pressure and certain hour, just can complete sulfuration combination step, obtain sulfuration assembly.
Step 5: the sulfuration assembly completed is put on magnetizing equipment and adds magnetic, then detect magnetic property, rejects defective products, namely obtains qualified multi-pole magnetic plastic encoder.
The specific performance of the multi-pole magnetic plastic encoder of above-mentioned production sees the following form:
The invention provides multi-pole magnetic plastic encoder, it has smooth outward appearance, the continuous north and south magnetic pole be evenly distributed, one pole deviation and the low and stronger magnetic induction density of Accumulated deviation, in actual applications, such as, be used in the hub bearing of high ferro motor-car and subway rail car to provide the signal of vehicle wheel rotational speed, one week continuous north and south magnetic pole accurately, through inner fixing sensor collection signal, the number of revolutions of wheel is converted into digital signal to be sent in vehicle-mounted computer, it can provide Magnetic Field accurately, stronger environmental suitability and excellent serviceable life.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious realization of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that method is conceived and technical scheme is carried out of invention; or the design of invention and technical scheme directly applied to other occasion, all in protection scope of the present invention without to improve.
Claims (2)
1. a production technology for multi-pole magnetic plastic encoder, described scrambler comprises magnetic plastics outer ring, iron frame inner ring and bonding sulphurated siliastic layer between the two; Described magnetic plastics outer ring is the compound mixture of thermoplastics and ferrite powder, and described thermoplastics is polypropylene, nylon 12, nylon 11, NYLON610, nylon66 fiber, poly-trifluoro-ethylene or polycarbonate; Described bonding sulphurated siliastic layer is that polysiloxane, hard carbon black and organic peroxide sulfuration form; Described polysiloxane is dimethyl-silicon rubber (MQ), methyl ethylene silicon raw rubber (VMQ) or methyl phenyl vinyl silicon raw rubber (PVMQ); Described hard carbon black is amorphous silicic acid and silicate; Described ferrite powder is barium ferrite, strontium ferrite, SmCo ferrite, neodymium iron boron ferrite or other rare earth, iron oxysomes;
Described organic peroxide is benzoyl peroxide, 2,4-dichlorobenzoperoxides, cumyl peroxide or 2,5-dimethyl-2,5-di-t-butyl hexane peroxide;
Described iron frame inner ring is medium carbon steel;
It is characterized in that, described production technology comprises following operation:
Step 1: the compound mixture under high temperature fused state by thermoplastics and ferrite powder, by obtaining feed particulate material after extruding pelletization, then makes plastic outer ring by extrusion shaping machine, stand-by;
Step 2: add amorphous silicic acid and silicate in polysiloxane, then mixing in the Banbury mixer of uniform temperature and pressure, mixing complete after the compound adhesive of acquisition silicon rubber and hard carbon black, organic peroxide is added in compound adhesive, by obtaining bonding vulcanizing silicone rubber composite after mill mixing dispersion, stand-by;
Step 3: select medium carbon steel blank, become iron frame inner ring stand-by by machine tooling;
Step 4: iron frame inner ring and plastic outer ring are assembled together, bonding vulcanizing silicone rubber composite according to the rules size cut into strip, panel vulcanizing press is warming up to suitable temperature, then open panel vulcanizing press and open mould simultaneously, first put into the assembly of iron frame inner ring and plastic outer ring, then put into rapidly bonding vulcanizing silicone rubber composite, close die, start panel vulcanizing press; Under the condition of high temperature, high pressure and certain hour, complete sulfuration combination, obtain sulfuration assembly;
Step 5: the sulfuration assembly completed is put on magnetizing equipment and adds magnetic, make the multi-pole magnetic plastic encoder of finished product.
2. the production technology of multi-pole magnetic plastic encoder according to claim 1, is characterized in that, described hard carbon black is gel and the aerogel of precipitated silica, aerosil or superfine silicon dioxide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210128522.0A CN102662075B (en) | 2012-04-27 | 2012-04-27 | A kind of multi-pole magnetic plastic encoder and production technology thereof |
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| CN201210128522.0A CN102662075B (en) | 2012-04-27 | 2012-04-27 | A kind of multi-pole magnetic plastic encoder and production technology thereof |
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| CN102662075A CN102662075A (en) | 2012-09-12 |
| CN102662075B true CN102662075B (en) | 2016-01-20 |
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| CN103331855B (en) * | 2013-07-08 | 2015-10-28 | 江苏天辰新材料股份有限公司 | The hot rubber vulcanization processes of a kind of magnetic |
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| CN1723385A (en) * | 2003-05-22 | 2006-01-18 | 日本精工株式会社 | Load measuring device for rolling bearing unit and load masuring rolling bearing unit |
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| CN101639367A (en) * | 2008-07-29 | 2010-02-03 | 上海人本集团有限公司 | Process for manufacturing multi-polar magnetic coder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007016057A (en) * | 2005-07-05 | 2007-01-25 | Nok Corp | Thermoplastic elastomer composition |
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| CN1056369A (en) * | 1990-04-19 | 1991-11-20 | 帝国化学工业公司 | Resin bound type magnet and production method thereof |
| CN1723385A (en) * | 2003-05-22 | 2006-01-18 | 日本精工株式会社 | Load measuring device for rolling bearing unit and load masuring rolling bearing unit |
| CN1934421A (en) * | 2004-01-22 | 2007-03-21 | 日本精工株式会社 | Magnetic encoder and bearing |
| CN101639367A (en) * | 2008-07-29 | 2010-02-03 | 上海人本集团有限公司 | Process for manufacturing multi-polar magnetic coder |
Non-Patent Citations (1)
| Title |
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| 室温硫化硅橡胶胶粘剂粘接增强改性研究进展;王云英等;《中国胶粘剂》;20080731;第17卷(第7期);第50-53页 * |
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