CN105470778B - A kind of cleaning machine brush for electromachine and preparation method thereof - Google Patents
A kind of cleaning machine brush for electromachine and preparation method thereof Download PDFInfo
- Publication number
- CN105470778B CN105470778B CN201410443730.9A CN201410443730A CN105470778B CN 105470778 B CN105470778 B CN 105470778B CN 201410443730 A CN201410443730 A CN 201410443730A CN 105470778 B CN105470778 B CN 105470778B
- Authority
- CN
- China
- Prior art keywords
- brush
- electromachine
- cleaning machine
- preparation
- binder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Motor Or Generator Current Collectors (AREA)
Abstract
The invention discloses a kind of cleaning machine machine brush for electromachine and preparation method thereof, the composition material of the brush for electromachine belongs to materials science field, the preparation method of brush includes first by natural graphite, expanded graphite, polybenzoate resin, polyimides, additive, binder, curing agent is uniformly mixed, drying, and it crushes and is placed in mold, compression moulding, then curing process is carried out again, cutting, grinding, turn hole, line is filled out to form, cleaning machine brush for electromachine low noise in use prepared by the method for the present invention, commutation ability is good, electric efficiency requires high and service life long, more importantly there is high-wearing feature, low noise, grade of spark is low, spark requires small when unloaded, product stability is good.
Description
Technical field
The present invention relates to brush for electromachine to belong to more particularly to a kind of cleaning machine brush for electromachine and preparation method thereof
Motor field, and be widely used on medical industry, manufacturing and Domestic cleaning machine motor.
Background technology
Motor brush be the rotating machineries such as motor or generator fixed part and rotating part between transmit energy or
The device of signal, also known as carbon brush.Carbon brush is usually that pure carbon adds coagulator to be made, and external form is usually square, is stuck on metallic support,
There is spring handle in the inside, and it is pressed in shaft, is to make sliding contact with movement parts and form a kind of conductive component being electrically connected.Carbon
The rubber item that the appearance of brush is somewhat like wiping pencil is such, there is conducting wire extraction on top.Volume varies.Carbon brush is a kind of for changing
To on device or slip ring, as the slide contact member for importing and exporting electric current, it is widely used in many electrical equipments.It
Conduction, heat conduction and greasy property are good, and the instinct with certain mechanical strength and commutation property spark.It is almost all of straight
Galvanic electricity machine and commutating machine all use brush, it is the important composition component of motor.
Brush is divided into soft brush, middle hard brush and hard brush by the soft or hard of material；Object is used by brush
Steam turbine generator brush, steel mill electric machine brush, traction electric machine brush, automobile and tractor brush, electronic work can be divided into
Tool brush, aircrafts electric machinery electricity consumption etc.；It is divided into black electrical brush (being made of pure carbon graphite material) and colored electrodeposition by the color of brush
It brushes (being made of the metal materials such as copper and graphite)；By the difference of brush material, can be divided into：(1) electrographite brush.(2) electrographite
Brush.(3) metal-graphite brush.
In the prior art, generally use carbon, graphite composite powder for base-material, and using resin as adhesives, through kneading, milling,
It is molded and cures to manufacture brush,
Cleaning machine motor direct current generator is because of the high feature of its low noise, rotating speed, by requiring brush to have commutation ability
Well, the advantages that service life is long, efficiency requirements are high；Further, since the commutation of cleaning machine motor requires harshness, it is desirable that brush changes
Tropism will be got well, and spark is inhibited to require the features such as high.However, general brush performance is poor, stability is bad, brush unit
Hypertonia, resistance is big, hardness is high, and existing cleaning machine brush for electromachine leans on import substitution, domestic carbon brush factory cannot be satisfied substantially
The requirement of cleaning machine brush for electromachine, relies on Imported Electrical Brush substantially.
Invention content
The primary and foremost purpose of the present invention is that a kind of cleaning machine brush for electromachine is provided the problem of presence for the above-mentioned prior art
And preparation method thereof, brush for electromachine resistivity of the invention is low, wearability is good, commutation ability is good, efficient and service life
It is long, it is often more important that with low noise, grade of spark is low, product stability is good.
To achieve the purpose of the present invention, one aspect of the present invention provides a kind of preparation method of cleaning machine brush for electromachine, packet
It includes：
1) raw material natural graphite, expanded graphite, polybenzoate resin, polyimides, additive, curing agent are uniformly mixed,
Premix is made；
2) raw material binder is mixed with solvent acetone, dissolving is uniformly mixed, and binder solution is made；
3) it after mixing by premix and binder solution, places, brush raw mixture is made；
4) drying and processing, break process are carried out successively to brush raw mixture, brush material mix powder is made；
5) compression process is carried out to brush material mix powder, brush crude green body is made；
6) brush crude green body is subjected to curing process, brush blank is made；
7) the brush blank after curing process cut, be ground, turn hole, filled out the mechanical processing steps such as line and get product
Brush.
Wherein, step 1), raw material natural graphite described in step 2), expanded graphite, polybenzoate resin, polyimides, add
The weight of agent, binder, curing agent is added to be：Natural graphite 60-80, expanded graphite 5-10, polybenzoate resin 4-8, gather
Acid imide 1-4, additive 0.8-5, binder 15-30, curing agent 2-5.
In particular, the weight of the raw material is preferably：Natural graphite 65-75, expanded graphite 6-10, polybenzoate tree
Fat 5-7.5, polyimides 1-3, additive 1.5-5, binder 18-28, curing agent 2-4.
Especially, the granularity of the natural graphite is 100-200 mesh, carbon content >=99%, ash≤1%；The expansion
The granularity of graphite is 200-300 mesh, carbon content >=99%, ash≤1%, moisture content≤1%；
Polybenzoate (i.e. ekonol, the Ekonol or PHB) resin is aromatic polyester liquid crystal polymer, is in
Brown is formed by P-hydroxybenzoic acid phenyl ester polycondensation, and molecular backbone contains to oxygen benzoyl constitutional repeating unit, and crystallinity is very
Height, self lubricity is good, and thermal stability is high, has preferable mechanical strength and processing performance.
In particular, the polybenzoate is preferably the ZC1011 type polybenzoate of Zi Gong Zhong Cheng special plastics Co., Ltd production.
The polyimides is Thermocurable polyimide, is a kind of yellow powder, thermal stability, machinery with height
Intensity and superior wear-resisting, self lubricity.
In particular, the relative density of the polybenzoate resin is 1.43~1.46g/cm3, preferably 1.44g/cm3, average
15~100 μm of grain size, number-average molecular weight are 7000~60000；The relative density of the polyimides is about 1.30~1.39g/
cm3, average grain diameter is 30~40 μm, number-average molecular weight 9000~70000.
Especially, the polyimides is preferably the SP-1 type polyimides of Mitsui Chemicals, Inc's production.
Wherein, the additive selection molybdenum disulfide and silicon carbide.Additive molybdenum disulfide and silicon carbide have excellent
Frictional behaviour, friction coefficient is relatively low, and commutation ability is good.
In particular, the weight of the molybdenum disulfide and silicon carbide is 2-3：1, preferably 2.5：1.
Especially, the average grain diameter of the additive is 200-300 mesh, and preferably 200 mesh, molybdenum disulfide has excellent
Frictional behaviour, friction coefficient is relatively low, and commutation ability is good.
Especially, the silicon carbide is hexagonal crystallographic texture, and proportion is 3.20~3.25, and silicon carbide chemical property is steady
Calmly, thermal coefficient is high, coefficient of thermal expansion is small, wear-resisting property is good, while itself and brush raw graphite good mixing property of the present invention, makes
Raw material is uniformly mixed, the commutation ability that can be effectively increased brush intensity, inhibit electric spark, improve brush.
Wherein, the binder selection epoxy resin, phenolic resin, preferably epoxy resin.
In particular, the epoxy resin is diglycidyl ether type epoxy resin.
Especially, the epoxy resin is the bisphenol A type epoxy resin in glycidyl ether type epoxy resin.
In particular, the epoxide number of the epoxy resin is 0.25-0.45.
Especially, the epoxide number of the glycidyl ether type epoxy resin is 0.25-0.45.
Especially, epoxy resin selection glycidol ethers made of diphenol propane and epoxychloropropane polycondensation
Epoxy resin.
Wherein, the curing agent selects epoxy curing agent.
In particular, the epoxy curing agent selects epoxy resin latent curing agent.
Especially, the epoxy resin lalent solidifying agent selection modified aliphatic amine, aromatic diamines dicyandiamide
Class, imidazoles organic acid anhydride, organic hydrazides, lewis acid or microcapsules based epoxy resin latent curing agent.
In particular, the epoxy resin lalent solidifying agent selection adipic dihydrazide, T-31 curing agent, preferably T-31
Curing agent.
Especially, the T-31 curing agent is a kind of phenolic aldehyde amine of performance synthesis (PAA) epoxy hardener, light brown clear
Viscous liquid, (20 DEG C) of density are 1.08~1.09g/cm3；460~550mgKOH/g of amine value；Refractive index 1.5250~
1.5300；75 DEG C of flash-point (opening cup)；Viscosity (25 DEG C) 1000~1300mPa.s.
The spies such as the natural graphite of the present invention has light weight, conduction, heat conduction, greasy property is good, machining property is excellent
Point, it is 100-200 mesh, carbon content >=99%, ash≤1% especially to select crystalline flake graphite, average grain diameter；The expansion stone
Ink have bulk density is small, make the close property of material system is good, later stage operation when inhibit spark, average grain diameter is 200 mesh, carbon content >=
99%, ash≤1%, moisture content≤1%, expanded graphite material is soft, wear-resistant, enhances wear-resisting property, the anti-interference of brush
Energy and commutation ability, spark is small when being contacted with commutator；Epoxy resin of binder is solid by high temperature in brush preparation process
Change, active group open chain and is chained up with the special groups in graphite and additive component in resin, a variety of materials structure is glutinous
Knot together, makes that material structure is finer and close, performance is stablized, and plays the role of adhesive.
Wherein, the mixing for carrying out raw material in step 1) at ambient temperature obtains the premix.
In particular, the room temperature is 15-35 DEG C, preferably 20-35 DEG C.
In particular, raw material is uniformly mixed by stirring in step 1), mixing time 1-2.5h, preferably 1-1.5h.
Wherein, the weight of binder described in step 2) and solvent acetone is 1：1.8-2.5 preferably 1：2.0-
2.3。
In particular, the premix is uniformly mixed with binder solution by stirring in step 3), mixing time 1-
2.5h, preferably 1.0-1.5h.
In particular, further include that the premix that will be uniformly mixed is placed at least for 24 hours with binder solution, solvent flashing acetone.
Especially, the placement processing for 24 hours or more, natural solvent flashing acetone are carried out in step 3) at room temperature.
In particular, the room temperature is 15-35 DEG C, preferably 20-35 DEG C.
Wherein, drying and processing described in step 4) stabilizes to 60-80 DEG C, preferably 65-75 DEG C；Drying time is 8-
12h, preferably 10-12h；The mesh of the granularity of the brush material mix powder≤60, the granularity of brush material mix powder
More thinner, better, preferably 60-200 mesh, further preferably 60-100 mesh.
Wherein, the bulk density of control brush crude green body is 1.68-1.76g/ during the compression moulding described in step 5)
cm3, preferably 1.72-1.74g/cm3。
Wherein, the temperature of curing process described in step 6) is 200-230 DEG C；The curing process time is 7-10h, preferably
7.5-9.5h。
In particular, the temperature of brush crude green body is warming up to 200-230 DEG C in 5-6h by room temperature (15-35 DEG C) first, so
2-4h is kept at being afterwards 200-230 DEG C in temperature；It is warming up to 200-230 DEG C by 15-35 DEG C preferably in 5-6h, then in temperature
Degree is to keep 2.5-4h at 200-230 DEG C.
Especially, heating rate be 28-42 DEG C/h, preferably 28-37 DEG C/h.
The cleaning machine brush for electromachine of the present invention has the following advantages：
1, invention brush raw material composition is reasonable, scientific formulation, the brush for electromachine wearability prepared using binder resin
It can excellent, low noise, service life length, environmental protection, 10% or more wear-resisting property raising.
2, use molybdenum disulfide in brush for electromachine of the invention, motor commutation performance is good, and stability is high, it is anti-interference by force with
And properties of brush can be protected unaffected in various environment.
3, expanded graphite, silicon carbide are used in brush for electromachine of the invention, it is suppressed that machine occur during brush use
Tool spark, grade of spark is low, and no-spark when unloaded, spark reduces at least one grade, extends the service life of brush.
4, the resistivity of cleaning machine brush for electromachine prepared by the method for the present invention is low, wearability is good, commutation ability is good, anti-dry
It disturbs that ability is strong, service life is long, can preferably meet cleaning machine motor to the various requirement of brush, have a wide range of application.
5, the preparation method of brush for electromachine of the invention is simple, and preparation process is simple, and product quality stablizing effect is apparent,
And it is easy to use.
6, cleaning machine brush for electromachine prepared by the present invention is used suitable for high pressure (220V) cleaning machine, in being particularly suitable for
The country of state cleaning machine motor uses.
Specific implementation mode
The invention will now be further described with reference to specific embodiments, the advantages and features of the present invention will be with description and
It is apparent.But examples are merely exemplary for these, and it is not intended to limit the scope of the present invention in any way.People in the art
Member it should be understood that without departing from the spirit and scope of the invention can to the details of technical solution of the present invention and form into
Row modifications or substitutions, but these modifications and replacement are each fallen in protection scope of the present invention.
The granularity of the natural graphite used in the present invention is 100 mesh, carbon content >=99%, ash≤1%；It is described swollen
The granularity of swollen graphite is 200-300 mesh, carbon content >=99%, ash≤1%, moisture content≤1%；The polybenzoate is aromatic polyester
Liquid crystal polymer, it is brown, it is formed by P-hydroxybenzoic acid phenyl ester polycondensation, density is 1.43~1.46g/cm3, average grain diameter
15-100 μm, number-average molecular weight is 7000~60000, and molecular backbone contains to oxygen benzoyl constitutional repeating unit, crystallinity
Very high, self lubricity is good, and thermal stability is high, has preferable mechanical strength and processing performance；The polyimides is thermosetting property
Polyimides, is a kind of yellow powder, and relative density is about 1.30~1.39g/cm3；Average grain diameter is 30~40 μm；Number is divided equally
Son amount is 9000~70000, the thermal stability with height and wear-resisting, self lubricity more.
The polybenzoate resin used in the embodiment of the present invention is purchased from Zi Gong Zhong Cheng special plastics Co., Ltd, model
ZC1011, it is characterized in that：Relative density is 1.43~1.46g/cm3, 15~100 μm of average grain diameter, number-average molecular weight 7000
~60000；Polyimides be purchased from Mitsui Chemicals, Inc, model SP-1, it is characterized in that：Density is about 1.30~1.39g/
cm3, average grain diameter is 30~40 μm, number-average molecular weight 9000~70000.
Embodiment 1
1) (kg) is stocked up according to following weight proportion：
Wherein, additive includes molybdenum disulfide and silicon carbide, and the weight proportion of molybdenum disulfide and silicon carbide is 2.5：1；It is viscous
It ties agent and selects bisphenol A type epoxy resin, epoxide number 0.25-0.45；The curing agent selects latent curing agent T-31 solid
Agent (Changzhou mountain peak Chemical Co., Ltd.)；
2) raw material natural graphite, expanded graphite, polybenzoate resin (PHB), polyimides, additive, curing agent are placed in
In kneading pot, the tumbler of kneading pot is opened, stops after mixing 1.5h under room temperature (35 DEG C), then discharges, premix is made
Material.
3) epoxy resin of binder of 24kg is dissolved in the acetone of 48kg, is uniformly mixed, binder solution is made；
4) binder solution is added in premix and stirs, is uniformly mixed, stir 1.5h, after mixing extract
Material, is placed under room temperature (25 DEG C), and acetone volatilization is placed more than for 24 hours so that without acetone residue in material, brush raw material is made
Mixture；
5) brush raw mixture is placed in baking oven first and carries out drying and processing, further remove acetone, be made and be free of
The raw mixture of acetone, the wherein temperature of drying and processing are 70 DEG C, and the drying and processing time is 10h；Then by the object after drying
Material carries out break process, and broken material crosses 60 mesh sieve, brush material mix powder, brush material mix powder granularity is made
≤ 60 mesh；
6) brush material mix powder is placed in mold, compression process is carried out using hydraulic press, in 8.5MPa pressure
Lower compression molding, obtains cleaning machine brush for electromachine crude green body, and the bulk density of wherein cleaning machine brush for electromachine crude green body reaches
1.70-1.73g/cm3, stop compression moulding processing；
The bulk density of control brush crude green body is the abrasion for the control brush later stage, spark, noise in pressing process
With the elements such as service life.Bulk density control difference directly affects properties of brush, wear-resisting property and service life etc.！Bulk density is excessive, then
Cause the hardness of follow-up brush bigger than normal, and resistance reduces, spark is big, high noise；If bulk density is too small, follow-up brush is caused
Hardness it is less than normal, the service life is shorter, thus the present invention prepare cleaning machine brush for electromachine control crude green body bulk density be
1.68-1.76g/cm3, can make cleaning machine brush for electromachine obtained with longer service life with preferably
Spark, noise and abrasion resistance properties.
7) brush crude green body is placed in baking oven in 6h, oven temperature is increased to 200 DEG C by room temperature (25 DEG C), wherein rising
Warm rate is 30 DEG C/h；Then 3h is kept at being 200 DEG C in temperature, the brush blank after curing process is made；
8) the brush blank after curing process cut, grinding machine, drilled, filling out line up to cleaning machine brush for electromachine.
It is measured according to the method for JB/T8133.14-1999 (electric carbon product physical and chemical performance test method bulk density)
The bulk density of cleaning machine brush for electromachine；According to JB/T8133.2-1999 (electric carbon product physical and chemical performance test method electricity
Resistance rate) method measure cleaning machine brush for electromachine resistivity；Using the Shore hardness of HS-19CTV type hardness tester machine private wipers,
It the results are shown in Table 1.
Embodiment 2
1) (kg) is stocked up according to following weight proportion：
Wherein, additive includes molybdenum disulfide and silicon carbide, and the weight proportion of molybdenum disulfide and silicon carbide is 3.5：1.5；
Binder selects bisphenol A type epoxy resin, epoxide number 0.25-0.45；The curing agent selects epoxy resin resting form solid
Agent adipic dihydrazide (Wuxi City Liang Xi Fine Chemical Co., Ltd)；
2) raw material natural graphite, expanded graphite, polybenzoate resin (PHB), polyimides, additive, curing agent are placed in
In kneading pot, the tumbler of kneading pot is opened, stops after mixing 1h under room temperature (25 DEG C), premix is made.
3) epoxy resin of binder of 18kg is dissolved in the acetone of 41.4kg, is uniformly mixed, binder solution is made；
4) binder solution is added in premix and stirs, is uniformly mixed, stirred 1h, take out material after mixing,
It is placed under room temperature (15 DEG C), acetone volatilization is placed more than for 24 hours so that without acetone residue in material, brush raw material mixing is made
Object；
5) brush raw mixture is placed in baking oven first and carries out drying and processing, further remove acetone, be made and be free of
The raw mixture of acetone, the wherein temperature of drying and processing are 75 DEG C, and the drying and processing time is 8h；Then by the material after drying
Break process is carried out, broken material sieves with 100 mesh sieve, and brush material mix powder, brush material mix powder granularity is made
≤ 100 mesh；
6) brush material mix powder is placed in mold, compression process is carried out using hydraulic press, under 15MPa pressure
Compression molding, obtains cleaning machine brush for electromachine crude green body, and the bulk density of wherein cleaning machine brush for electromachine crude green body reaches
1.72-1.74g/cm3, stop compression moulding processing；
7) brush crude green body is placed in baking oven in 5h, there is room temperature (20 DEG C) to be increased to 200 DEG C oven temperature, wherein rising
Warm rate is 36 DEG C/h；Then 2.5h is kept at being 230 DEG C in temperature, the brush blank after curing process is made；
8) the brush blank after curing process cut, grinding machine, drilled, filling out line up to cleaning machine brush for electromachine.
It is measured according to the method for JB/T8133.14-1999 (electric carbon product physical and chemical performance test method bulk density)
The bulk density of cleaning machine brush for electromachine；According to JB/T8133.2-1999 (electric carbon product physical and chemical performance test method electricity
Resistance rate) method measure cleaning machine brush for electromachine resistivity；Using the Shore hardness of HS-19CTV type hardness tester machine private wipers,
It the results are shown in Table 1.
Embodiment 3
1) (kg) is stocked up according to following weight proportion：
Wherein, additive includes molybdenum disulfide and silicon carbide, and the weight proportion of molybdenum disulfide and silicon carbide is 1：0.5；It is viscous
It ties agent and selects bisphenol A type epoxy resin, epoxide number 0.25-0.45；The curing agent selects the solidification of epoxy resin resting form
Agent T-31 curing agent (Changzhou mountain peak Chemical Co., Ltd.)；
2) raw material natural graphite, expanded graphite, polybenzoate resin (PHB), polyimides, additive, curing agent are placed in
In kneading pot, the tumbler of kneading pot is opened, stops after mixing 1.5h under the conditions of room temperature (35 DEG C), premix is made.
3) epoxy resin of binder of 28kg is dissolved in the acetone of 56kg, is uniformly mixed, binder solution is made；
4) binder solution is added in premix and stirs, is uniformly mixed, stir 1.5h, after mixing extract
Material, is placed under room temperature (20 DEG C), and acetone volatilization is placed more than for 24 hours so that without acetone residue in material, brush raw material is made
Mixture；
5) brush raw mixture is placed in baking oven first and carries out drying and processing, further remove acetone, be made and be free of
The raw mixture of acetone, the wherein temperature of drying and processing are 65 DEG C, and the drying and processing time is 12h；Then by the object after drying
Material carries out break process, and broken material crosses 60 mesh sieve, brush material mix powder, brush material mix powder granularity is made
≤ 60 mesh；
6) brush material mix powder is placed in mold, compression process is carried out using hydraulic press, under 12MPa pressure
Compression molding, obtains cleaning machine brush for electromachine crude green body, and the bulk density of wherein cleaning machine brush for electromachine crude green body reaches
1.74-1.76g/cm3, stop compression moulding processing；
7) brush crude green body is placed in baking oven in 5.5h, there is room temperature (30 DEG C) to be increased to 230 DEG C oven temperature, wherein
Heating rate is 36.4 DEG C/h；Then 4h is kept at being 230 DEG C in temperature, the brush blank after curing process is made；
8) the brush blank after curing process cut, grinding machine, drilled, filling out line up to cleaning machine brush for electromachine.
It is measured according to the method for JB/T8133.14-1999 (electric carbon product physical and chemical performance test method bulk density)
The bulk density of cleaning machine brush for electromachine；According to JB/T8133.2-1999 (electric carbon product physical and chemical performance test method electricity
Resistance rate) method measure cleaning machine brush for electromachine resistivity；Using the Shore hardness of HS-19CTV type hardness tester machine private wipers,
It the results are shown in Table 1.
Embodiment 4
1) (kg) is stocked up according to following weight proportion：
Wherein, additive includes molybdenum disulfide and silicon carbide, and the weight proportion of molybdenum disulfide and silicon carbide is 0.6：0.2；
Binder selects bisphenol A type epoxy resin, epoxide number 0.25-0.45；The curing agent selects latent curing agent T-31
Curing agent (Changzhou mountain peak Chemical Co., Ltd.)；
2) raw material natural graphite, expanded graphite, polybenzoate resin (PHB), polyimides, additive, curing agent are placed in
In kneading pot, the tumbler of kneading pot is opened, stops after mixing 1h under room temperature (15 DEG C), premix is made.
3) epoxy resin of binder of 30kg is dissolved in the acetone of 54kg, is uniformly mixed, binder solution is made；
4) binder solution is added in premix and stirs, is uniformly mixed, stirred 2h, take out material after mixing,
It is placed under room temperature (25 DEG C), acetone volatilization is placed more than for 24 hours so that without acetone residue in material, brush raw material mixing is made
Object；
5) brush raw mixture is placed in baking oven first and carries out drying and processing, further remove acetone, be made and be free of
The raw mixture of acetone, the wherein temperature of drying and processing are 60 DEG C, and the drying and processing time is 12h；Then by the object after drying
Material carries out break process, and broken material sieves with 100 mesh sieve, and brush material mix powder, brush material mix powder grain is made
Spend≤100 mesh；
6) brush material mix powder is placed in mold, compression process is carried out using hydraulic press, under 14MPa pressure
Compression molding, obtains cleaning machine brush for electromachine crude green body, and the bulk density of wherein cleaning machine brush for electromachine crude green body reaches
1.68-1.70g/cm3, stop compression moulding processing；
7) brush crude green body is placed in baking oven in 6h, there is room temperature (30 DEG C) to be increased to 200 DEG C oven temperature, wherein rising
Warm rate is 28.4 DEG C/h；Then 3.5h is kept at being 200 DEG C in temperature, the brush blank after curing process is made；
8) the brush blank after curing process cut, grinding machine, drilled, filling out line up to cleaning machine brush for electromachine.
It is measured according to the method for JB/T8133.14-1999 (electric carbon product physical and chemical performance test method bulk density)
The bulk density of cleaning machine brush for electromachine；According to JB/T8133.2-1999 (electric carbon product physical and chemical performance test method electricity
Resistance rate) method measure cleaning machine brush for electromachine resistivity；Using the Shore hardness of HS-19CTV type hardness tester machine private wipers,
It the results are shown in Table 1.
Embodiment 5
1) (kg) is stocked up according to following weight proportion：
Wherein, additive includes molybdenum disulfide and silicon carbide, and the weight proportion of molybdenum disulfide and silicon carbide is 2.5：1；It is viscous
It ties agent and selects bisphenol A type epoxy resin, epoxide number 0.25-0.45；The curing agent selects latent curing agent adipic acid
Two hydrazides；
2) raw material natural graphite, expanded graphite, polybenzoate resin (PHB), polyimides, additive, curing agent are placed in
In kneading pot, the tumbler of kneading pot is opened, stops after mixing 2.5h under room temperature (25 DEG C), premix is made.
3) epoxy resin of binder of 15kg is dissolved in the acetone of 37.5kg, is uniformly mixed, binder solution is made；
4) binder solution is added in premix and stirs, is uniformly mixed, stirred 1h, take out material after mixing,
It is placed under room temperature (25 DEG C), acetone volatilization is placed more than for 24 hours so that without acetone residue in material, brush raw material mixing is made
Object；
5) brush raw mixture is placed in baking oven first and carries out drying and processing, further remove acetone, be made and be free of
The raw mixture of acetone, the wherein temperature of drying and processing are 80 DEG C, and the drying and processing time is 10h；Then by the object after drying
Material carries out break process, and broken material crosses 60 mesh sieve, brush material mix powder, brush material mix powder granularity is made
≤ 60 mesh；
6) brush material mix powder is placed in mold, compression process is carried out using hydraulic press, under 15MPa pressure
Compression molding, obtains cleaning machine brush for electromachine crude green body, and the bulk density of wherein cleaning machine brush for electromachine crude green body reaches
1.73-1.75g/cm3, stop compression moulding processing；
7) brush crude green body is placed in baking oven in 5h, there is room temperature (15 DEG C) to be increased to 200 DEG C oven temperature, wherein rising
Warm rate is 37 DEG C/h；Then 4h is kept at being 200 DEG C in temperature, the brush blank after curing process is made；
8) the brush blank after curing process cut, grinding machine, drilled, filling out line up to cleaning machine brush for electromachine.
The density of cleaning machine brush for electromachine is measured according to the method for JB/T8133.14-1999；According to JB/T8133.2-
1999 methods measure the resistivity of cleaning machine brush for electromachine；The Shore hardness of brush is measured using HS-19CTV type hardness tester machines,
It the results are shown in Table 1.
Reference examples
With commercially available cleaning machine motor (karcher HD5/11C KSH, 220V) brush example as a contrast.
The density of cleaning machine brush for electromachine is measured according to the method for JB/T8133.14-1999；According to JB/T8133.2-
1999 methods measure the resistivity of cleaning machine brush for electromachine；The Shore hardness of brush is measured using HS-19CTV type hardness tester machines,
It the results are shown in Table 1.
The physical performance index of 1 brush of table
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Reference examples | |
| Density g/cm3 | 1.45 | 1.38 | 1.42 | 1.40 | 1.41 | 1.39 |
| Shore hardness HSD | 25 | 20 | 24 | 21 | 23 | 19 |
| Resistivity μ Ω m | 450 | 801 | 611 | 657 | 585 | 516 |
The test result of table 1 shows：The bulk density of cleaning machine brush for electromachine prepared by the present invention is low, and bulk density is
1.38-1.45g/cm3；The hardness of cleaning machine brush for electromachine is high, Shore hardness 20-25；Resistance is small, is suitable for low pressure
(220V) cleaning machine motor uses.And the hardness of existing cleaning machine brush for electromachine is low, spark stability is poor, and Shore hardness exists
Between 18-24, electrical resistivity range is small, only 380-600 μ Ω m.
1 cleaning machine brush for electromachine wear rate of test example is tested
Using cleaning machine brush for electromachine, control made from FNC-5 types load endurance test controller testing example 1-5
Example import cleaning machine brush for electromachine (karcher HD5/11C KSH, manufacturer：Germany is triumphant to speed；Density：1.39；Resistance：
516Ω；Shore hardness：19；Voltage：Wear rate 220V), test result are shown in Table 2.
The physical performance index of 2 brush of table
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Reference examples | |
| Wear rate mm/100H | 1.02 | 1.20 | 0.91 | 0.77 | 1.13 | 1.15 |
As seen from the results in Table 2：The low wear rate of the brush for electromachine of the present invention, low wear rate are wear-resisting in 1.2mm/100H
Performance is excellent, and compared with import cleaning machine brush for electromachine, abrasion resistance properties are suitable or even wear resistance can exceed that import cleaning
The wear-resisting property of machine brush for electromachine.
2 cleaning machine brush for electromachine of test example is high pressure resistant, grade of spark is tested
According to national standards《Electric rotating machine main technique requirements (GB/T 755-2000)》Test above-described embodiment 1-5 systems
High pressure resistant, the grade of spark of the cleaning machine brush for electromachine obtained, with commercially available import cleaning machine motor (karcher HD5/11C
KSH, manufacturer：Germany is triumphant to speed；Density：1.39；Resistance：516Ω；Voltage：220V Shore hardness：19；Wear rate：1.15)
Example, test result are shown in Table 3 to brush as a contrast.
The performance test results of 3 brush of table
From the test result of table 3：The grade of spark of the brush for electromachine of the present invention is low, is 11/4, with it is common it is commercially available into
The cleaning machine brush for electromachine of mouth is compared, and grade of spark reduces 1 grade, is inhibited spark ability good, is improved safe to use
Property.
Claims (8)
1. a kind of preparation method of cleaning machine brush for electromachine includes the steps that following sequence carries out：
1) raw material natural graphite, expanded graphite, polybenzoate resin, polyimides, additive, curing agent are uniformly mixed, are made
Premix, wherein additive selects molybdenum disulfide and silicon carbide；
2) raw material binder is mixed with solvent acetone, dissolving is uniformly mixed, and binder solution is made；
3) it after mixing by premix and binder solution, places, brush raw mixture is made；
4) drying and processing, break process are carried out successively to brush raw mixture, brush material mix powder is made；
5) compression process is carried out to brush material mix powder, brush crude green body is made；
6) brush crude green body is subjected to curing process, brush blank is made；
7) the brush blank after curing process cut, be ground, turn hole, filling out line to obtain the final product；
Wherein, step 1), raw material natural graphite described in step 2), expanded graphite, polybenzoate resin, polyimides, additive,
Binder, curing agent weight be：Natural graphite 60-80, expanded graphite 5-10, polybenzoate resin 4-8, polyimides
1-4, additive 0.8-5, binder 15-30, curing agent 2-5.
2. preparation method as described in claim 1, it is characterized in that the weight of the raw material is preferably：Natural graphite
65-75, polyimides 1-3, expanded graphite 6-10, polybenzoate resin 5-7.5, additive 1.5-5, binder 18-28, curing agent
2-4。
3. preparation method as described in claim 1, it is characterized in that the curing agent selects epoxy curing agent.
4. the preparation method as described in claim 1-2 is any, it is characterized in that binder selection epoxy resin or phenolic aldehyde tree
Fat.
5. the preparation method as described in claim 1-2 is any, it is characterized in that the temperature of drying and processing described in step 4) is 60-
80℃。
6. the preparation method as described in claim 1-2 is any, it is characterized in that being controlled during the compression process in step 5)
The bulk density of brush crude green body processed is 1.68-1.76g/cm3.
7. the preparation method as described in claim 1-2 is any, it is characterized in that the temperature of curing process described in step 6) is
200-230℃。
8. a kind of cleaning machine brush for electromachine, it is characterized in that being prepared according to such as any the methods of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410443730.9A CN105470778B (en) | 2014-09-03 | 2014-09-03 | A kind of cleaning machine brush for electromachine and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410443730.9A CN105470778B (en) | 2014-09-03 | 2014-09-03 | A kind of cleaning machine brush for electromachine and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105470778A CN105470778A (en) | 2016-04-06 |
| CN105470778B true CN105470778B (en) | 2018-07-13 |
Family
ID=55608231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410443730.9A Active CN105470778B (en) | 2014-09-03 | 2014-09-03 | A kind of cleaning machine brush for electromachine and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105470778B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4458524B2 (en) * | 2003-06-26 | 2010-04-28 | 日機装株式会社 | Method for manufacturing commutator motor brush |
| CN100388600C (en) * | 2003-09-04 | 2008-05-14 | 东炭化工株式会社 | Carbon brush for electric machine |
| CN102035118B (en) * | 2009-09-30 | 2013-09-18 | 苏州东豪碳素有限公司 | Manufacturing formula of electric brush for series-excitation AC-DC washing motor |
| JP5825705B2 (en) * | 2010-03-26 | 2015-12-02 | 東洋炭素株式会社 | Carbon brush |
| CN103259150B (en) * | 2012-02-16 | 2015-10-28 | 苏州东南碳制品有限公司 | A kind of electric brush for electric tool motor and preparation method thereof |
-
2014
- 2014-09-03 CN CN201410443730.9A patent/CN105470778B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105470778A (en) | 2016-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105322410B (en) | The preparation method of brush used for electric engine of cleaner and the brush prepared by this method | |
| CN104779511B (en) | The preparation method of running machine motor brush and the brush prepared by the method | |
| CN101665613B (en) | High-temperature baking resistant phenolic molding plastic | |
| CN104099065B (en) | Without copper friction materials and preparation method thereof | |
| CN101353544A (en) | Tough sintering epoxy powder coating and preparation thereof | |
| CN103554935B (en) | High-performance conductive asphalt and preparation method thereof | |
| CN104779503B (en) | A kind of running machine motor brush and preparation method thereof | |
| CN106010126A (en) | Graphene-based antistatic wear-resistant two-component epoxy resin coating | |
| CN103665771A (en) | Wear-resistant composition, wear-resistant gear and manufacturing method of wear-resistant gear | |
| CN106543648A (en) | Modified epoxy resin-based super-weather-resistant composite material for bus duct | |
| CN105470778B (en) | A kind of cleaning machine brush for electromachine and preparation method thereof | |
| CN106433067A (en) | Formula and preparation method of environment-friendly PC (polycarbonate)/ABS (acrylonitrile-butadiene-styrene) alloy material | |
| CN107090162A (en) | A kind of power distribution station electric power cabinet glass steel surface plate material and preparation method thereof | |
| CN109486115A (en) | A kind of non-dusting brush and motor brush structure | |
| CN105036747A (en) | Nano-hydroxyapatite-doped high-density motor carbon brush material and preparation method thereof | |
| US7094366B2 (en) | Resin-bonded graphite material, method for the production of a resin bonded graphite material and use thereof | |
| CN103194108A (en) | Wear-resistant conductive coating paint and preparation method thereof | |
| CN104987661A (en) | High-toughness motor carbon brush material mixed with nano zirconia and preparation method of material | |
| CN107254169B (en) | Heat-resistant electric brush and preparation method thereof | |
| CN106654782A (en) | Electric brush for treadmill motor | |
| CN106381115A (en) | Graphite-based epoxy resin conductive adhesive and preparation method thereof | |
| CN107254170B (en) | Electric brush based on cyanate ester/bismaleimide resin and preparation method thereof | |
| CN107325554B (en) | High-performance electric brush and preparation method thereof | |
| CN107666104A (en) | A kind of preparation method of running machine motor brush | |
| CN106519591A (en) | Engineering plastic material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200426 Address after: Wenzhou Shuangfeng town Industrial Park Taicang city Suzhou city Jiangsu province 215416 Patentee after: SUZHOU DONEKA NEW MATERIALS CORP. Ltd. Address before: Wenzhou Shuangfeng town Industrial Park Taicang city Suzhou city Jiangsu province 215415 Patentee before: SUZHOU DONON CARBON WARE Co.,Ltd. |