CN106050990A - Brake pad taking coir fibers as framework and preparation method thereof - Google Patents
Brake pad taking coir fibers as framework and preparation method thereof Download PDFInfo
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- CN106050990A CN106050990A CN201610407609.XA CN201610407609A CN106050990A CN 106050990 A CN106050990 A CN 106050990A CN 201610407609 A CN201610407609 A CN 201610407609A CN 106050990 A CN106050990 A CN 106050990A
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- coir
- brake pad
- brake block
- friction
- performance
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- 239000000835 fiber Substances 0.000 title abstract description 24
- 238000002360 preparation method Methods 0.000 title description 8
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 13
- -1 FKF compound Chemical class 0.000 claims abstract description 12
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 9
- 239000007822 coupling agent Substances 0.000 claims abstract description 8
- 239000002557 mineral fiber Substances 0.000 claims abstract description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000571 coke Substances 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 6
- 239000004411 aluminium Substances 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims description 15
- 229920006231 aramid fiber Polymers 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 6
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
- 239000011733 molybdenum Substances 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 238000009940 knitting Methods 0.000 claims description 4
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 9
- 239000000945 filler Substances 0.000 abstract description 7
- 229920005989 resin Polymers 0.000 abstract description 7
- 239000011347 resin Substances 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 239000004760 aramid Substances 0.000 abstract 1
- 229920003235 aromatic polyamide Polymers 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000004005 microsphere Substances 0.000 abstract 1
- 239000003607 modifier Substances 0.000 abstract 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 abstract 1
- 238000009716 squeeze casting Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 17
- 239000002783 friction material Substances 0.000 description 14
- 239000002131 composite material Substances 0.000 description 12
- 235000013162 Cocos nucifera Nutrition 0.000 description 10
- 238000009941 weaving Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 244000060011 Cocos nucifera Species 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000012783 reinforcing fiber Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 241000737241 Cocos Species 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000005011 phenolic resin Substances 0.000 description 3
- 229920001568 phenolic resin Polymers 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 241001195377 Prorates Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
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- 238000001125 extrusion Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229910017344 Fe2 O3 Inorganic materials 0.000 description 1
- 229920000433 Lyocell Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229920006253 high performance fiber Polymers 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 125000003010 ionic group Chemical group 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Braking Arrangements (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
A brake pad taking coir fibers as a framework mainly comprises the coir fibers, FKF compound mineral fibers, aramid fibrils, rare earth modified phenolic resin, a titanate coupling agent, nonionic polyacrylamide, carbon monofluoride, flexible coke, molybdenum disulfide, flake aluminium powder, hollow microsphere powder and calcium sulfate whiskers. Firstly, the natural coir fibers are woven into a three-dimensional integral fabric consistent with the brake pad in size, the resin, filler, a friction performance modifier and the like are injected through a moulding technology, and finally the high-performance automobile brake pad is formed through curing by means of a squeeze casting technology. The product not only meets the requirements of automobiles for various properties such as the friction coefficient, abrasion rate, hardness and impact toughness but also has the advantages of having no noise during braking, causing no pollution to the environment and the like.
Description
Technical field
The present invention relates to automobile brake brake block technical field, be specifically related to a kind of brake block with coir as skeleton
And preparation method thereof.
Background technology
Along with production, technology and the market situation of domestic and international brake friction material industry there occurs important change, make braking
Material is faced with the situation of sternness, more and more higher to its performance requirement: will to have enough and stable coefficient of frictions；Dynamic and static rub
The difference wiping coefficient is little；There are good heat conductivity, bigger thermal capacity and certain high temperature mechanical strength；Have good wear-resisting
Property and block resistance, be difficult to abrade mating plate, noiseless；Low cost, environmentally safe etc..At present, external friction material
Research, application work are still and go out in terms of material composition, preparation method, process route, structure design and analysis of experiments means etc.
Sending out and carry out overall restructuring, although the method that various countries use is varied, but its purpose is still to improve asbestos-free comprehensively
The performance of friction material, to meet demand and the society requirement to environmental conservation of auto industry development at high speed.
Brake block belongs to composite, and its performance is directly by factors such as the performance of its component, content, proportioning, physical dimensions
Impact.Particularly reinforcing fiber, the main component such as binding agent is the closest with the property relationship of friction material.Make from using cotton thread
First brake strip for reinforcing fiber is born, and to asbestos brake friction plate, semimetal friction material, then rubs to NAO
Material, high performance fibre reinforced friction material, all it is accompanied by research and development and the application of novel enhanced material.And high-quality brake
Sheet development it is important that make reinforcing fiber give full play to strengthen skeleton function, reduce brake block processing and use during splitting
Seam, crack performance.
Coir is again coir fibre, is wrapped around the coconut fibre tissue on coconut husk surface, is very difficult natural fiber, its matter
Ground is solid, and wearability is fine, it is possible to waterproof.The elasticity of coconut fibre silk makes it may be elongated to great limit, but still will not rupture；
Meanwhile, coir can support antimicrobial degrading and erosion that sea water is permanent, and it can tolerate permanent elastic elongation
Ability is seldom shown in.Coir length about 5～25CM, its content of lignin is high, has that fiber rigidity is big, fracture strength is high, disconnected
Split the features such as elongation is little, initial modulus is big.Prepare friction material using natural coconut fiber as reinforcing fiber, can be effectively improved and stop
The toughness of car sheet, extends the service life of brake disc, does not produces or produces harmful friction dust less, meets modern environmental protection and wants
Ask, represent the developing direction of current friction material.Additionally, exploitation renewable biomass resource is put into by China 12 planning
The precedence of national development strategy, exploitation coir can make full use of natural green resource, Biomass Industry Development of China, meet
Current national policy.
Three dimensional weaving technique is a kind of novel high-performance composite technology of preparing grown up from 20 end of the centurys, development
Its purpose is structural member and the shortcoming of high function product being difficult to make primary load bearing in order to solve conventional composite materials.And
Common fiber reinforcement brake block is typical brittle matrix composite, and its interface is the weak link of material internal, fiber
With the mechanical performance that matrix, the interfacial structure of filler and performance greatly affect material.
Summary of the invention
What first purpose of the present invention was the shortcoming for existing automobile brake sheet and provided a kind of uses intensity high, tough
Good, the stable friction performance high-performance automobile braking piece of property.On the one hand, utilize the feature that coir thickness is uneven, fibre can be made
Dimension axial stress distribution uniformity in brake block, reduces interfacial shear force simultaneously；On the other hand, three dimensional weaving technique is used
Coir is spun into 3-D solid structure, improves the transmission of power, make composite property less dependence interface, be obviously improved
The impact flexibility of brake block and the ability of opposing cracks can spread so that intensity and the impact flexibility of material are greatly improved.
Its advantage is the reinforced effects that can significantly improve fiber, makes the performance less dependence boundary strength of composite,
Its hot strength reaches 5～8 times of common brake block, and bending strength is 1.5 times of common brake block；Coir is used to prepare
D braided composites is as strengthening skeleton, and it acts on the screw-thread steel structural framing being similar in building, can improve and stop
The intensity of car sheet and toughness, effectively reduce the crack performance during brake block uses, meet necessary to automobile brake
Performance requirement.
Second object of the present invention is to make full use of existing natural coconut fiber, and a kind of tenor of preparation is low, braking
Time wear rate is little, chatter is less, noiselessness in braking procedure, do not produce harmful gas and powder, environment amenable automobile is stopped
The preparation method of car sheet.
The implementation method of the present invention is as follows:
For realizing first purpose of the present invention, the present invention use D braided composites as strengthen skeleton, initially with
Natural coconut fiber is compiled into preform by three dimensional knitting machine, then uses moulding technology resin by injection, filler and frictional behaviour to adjust
Joint agent etc., finally utilize Extrution casting technique to solidify to form high performance automobile brake sheet.
For realizing second object of the present invention, the key component of a kind of brake block with coir as skeleton is as follows: coconut palm
Fiber, FKF compound mineral fiber, aramid fiber fibril, rare earth modified phenolic resin, titanate coupling agents, non-ionic polyacrylamide,
Fluorographite, flexible coke, molybdenum bisuphide, scale aluminium powder, tiny balloon powder, calcium sulfate crystal whiskers.
Concrete technology flow process is as follows:
1, coir pretreatment: coconut palm will be through chemical method pretreatment before using: it is 2.5% that coir is soaked in mass fraction
NaOH solution in, boil process 1h, then be neutrality with deionized water rinsing, dry for standby.
2, spinning 3-D solid structure: with coir as raw material, utilize three dimensional knitting machine to be compiled into preform, be used as and stopping
The enhancing skeleton of car sheet.Its size is close with common brake block, and its product thickness is about 35～40mm, and porosity is 55%.Three-dimensional
In weaving preform, fiber is interweaved on three-dimensional, forms an overall space net structure, thus from structure
On enhance composite, it is to avoid brake block produce fracture or crack performance.
3, raw material mixing: carry out dispensing in automatic batching system, puts into self-control according to the ratio of formula by material and stirs
Stirring 15～20min in device, rotating speed is 500～800 r/min.In test preparation process, according to intensity, the friction system of brake block
Several pro rates to raw material are adjusted.
4, raw material injects: is put in the die cavity of mold closing by 3 D weaving preform, utilizes press injector former by mix
Material inject die cavity, utilize vacuum pump evacuation simultaneously, make raw material well into 3 D weaving preform, and primary solidification become
Type.Wherein injection pressure is 4.5Mpa.
5, squeeze cast form: after feeding injection in the die cavity equipped with 3 D weaving preform, in pressure head effect
Making raw material solidify, the extrusion equipment of use is YA32-100 type extruder, and wherein pressing speed is 7～10mm/s, and pressure is 50
～about 60MPa, hot pressing temperature is 180 DEG C, and pressing pressing time is 10～15 min.
Described reinforcing fiber comprises coir, FKF compound mineral fiber, aramid fiber fibril.
Wherein coir will be through chemical treatment before using.Coir filament length after process is 5～12cm, the most singly
Fibre fineness 0.7tex, broken filament intensity 5.5 cN/dtex.
Wherein FKF compound mineral fiber comprises multi mineral fiber, and main fibre is that high temperature resistant nonmetallic mineral is through 1000
DEG C high temperature above melting, centrifugal or spray webbing form, then are aided with a small amount of other and strengthen the tencel kind that compositions are mixed.Its
Fibre length is about 20mm, and main chemical composition has: SiO2, 40～43%；AL2 O3, 16～18%；CaO, 18～22%；MgO,
5～7%；Fe2 O3, 3～5%.In the present invention, the FKF compound mineral fiber of addition 18% is as reinforcing material.
Aramid fiber fibril therein is the velvet-like fiber grinding to form fibril, and surface is fluffy filoplume shape, presents in friction material
Going out stable friction factor, wear rate is low, the advantage that intensity is good.The performance indications of the aramid fiber fibril that the present invention uses are as follows: fiber
Length 0.5～2.2mm, tensile strength 16～20 × 103 K/cm.
The binding agent used in patent of the present invention selects rare earth modified phenolic resin prepared by Harbin Institute of Technology.Use
Rare earth material be rare earth chloride, resin is nbr modified phenolic resins, and method of modifying is outer addition formula physical modification, dilute
Soil addition is the 4% of nbr modified phenolic resins.The friction material manufactured according to Conventional process parameters with rare earth modified resin,
Coefficient of friction is the highest and stable.The chemism of rare earth is high, its addition and the uniform network structure of resin formation, has
It is beneficial to the interaction in interface of each constituent element and mutually moistening, makes whole material system be in the most steady state of thermodynamics, rubbing
Wipe the carbide produced under material at high temperature operating mode and little molecule material matter is few, so the heat fading of coefficient of friction is little.Through modification
Phenolic resin various raw materials can be bonded well, the most every physical and chemical index of brake block produced is excellent
Good.The heat resistanceheat resistant decline ability of brake block can be significantly improved as brake block matrix resin, there is good friction performance.
The coupling agent used in patent of the present invention is titanate coupling agents.Titanate coupling agents adds during batch mixing
Enter, can also be used with it and filler is carried out pretreatment.Titanate coupling agents is sprayed on wollastonite, improves combination circle of itself and resin
Face.
Using surfactant in patent of the present invention is non-ionic polyacrylamide.Non-ionic polyacrylamide strand contains
There are amide groups or ionic group, mineral fibres and organic affinity can be improved, improve mineral fibres and resinoid bond
The compatibility.
The frictional property regulator used in patent of the present invention is fluorographite, flexible coke, molybdenum bisuphide, scale aluminum
Powder.
Fluorographite heat stability and chemical stability are the best, are resistant to 400 DEG C～500 DEG C of high temperature, in friction material
The effect such as anti-attrition and regulation high temperature friction coefficient can be played.
Flexible coke is through proper temperature roasting and with the coke blacking of special process processing and manufacturing, can rise in friction material
To lubrication, damping, wear-resisting etc. act on, with fluorographite with the use of, effect is preferable.
Molybdenum bisuphide is used for antifriction when friction material major function is low temperature, increases and rub during high temperature.Meanwhile, it covers in friction
The surface of material, can protect other materials, prevents them oxidized.
Scale aluminium powder adds a small amount of lubricant with pure aluminum foil, through pounding crushing for squamous powder.For friction material, play
Stablize coefficient of friction, reduce abrasion and the effect of heat radiation.
Using filler in patent of the present invention is tiny balloon powder, calcium sulfate crystal whiskers.
Tiny balloon powder therein mainly comprises as borosilicate, mean diameter: 35 m, and relative density is 0.70 g/cm
, fusing point: 700 DEG C.As filler, granule spherical-like morphology is favorably improved the dimensional stability of brake block, reduces product weight.
Calcium sulfate crystal whiskers is threadiness monocrystal, has high intensity, high-modulus, high tenacity, high-insulativity, abrasion performance, resistance to
High temperature, many excellent physicochemical properties such as inexpensive.Patent of the present invention uses the index of calcium sulfate crystal whiskers: length is about 150
Um, diameter 7～8 um, fusing point: more than 1000 DEG C.
Detailed description of the invention
D braided composites prepared by a kind of brake block employing coir using coir as skeleton is as strengthening bone
Frame, first by the three-dimensional integral fabric of natural coconut fibrage one-tenth Yu brake block consistent size, then uses moulding technology to inject tree
Fat, filler and frictional property regulator etc., finally utilize Extrution casting technique to solidify to form high performance automobile brake sheet.Product
Not only can meet the automobile requirement to properties such as coefficient of friction, wear rate, hardness, impact flexibility, and there is braking nothing
Noise, the advantage such as free from environmental pollution.
The optimum formula ratio that the present invention obtains through test of many times is:
| Sequence number | Title | Mass ratio |
| 1 | Coir | 16% |
| 2 | FKF compound mineral fiber | 14% |
| 3 | Aramid fiber fibril | 6% |
| 4 | Rare earth modified phenolic resin | 12% |
| 5 | Titanate coupling agents | 2.5% |
| 6 | Non-ionic polyacrylamide | 3.5% |
| 7 | Fluorographite | 3.5% |
| 8 | Flexible coke | 2.5% |
| 9 | Molybdenum bisuphide | 4% |
| 10 | Scale aluminium powder | 6% |
| 11 | Tiny balloon powder | 14% |
| 12 | Calcium sulfate crystal whiskers | 16% |
The technological process used of this formula:
1, coir pretreatment: coconut palm will be through chemical method pretreatment before using: it is 2.5% that coir is soaked in mass fraction
NaOH solution in, boil process 1h, then be neutrality with deionized water rinsing, dry for standby.
2, spinning 3-D solid structure: with coir as raw material, utilize three dimensional knitting machine to be compiled into preform, be used as and stopping
The enhancing skeleton of car sheet.Its size is close with common brake block, and its product thickness is about 35～40mm, and porosity is 55%.Three-dimensional
In weaving preform, fiber is interweaved on three-dimensional, forms an overall space net structure, thus from structure
On enhance composite, it is to avoid brake block produce fracture or crack performance.
3, raw material mixing: carry out dispensing in automatic batching system, puts into self-control according to the ratio of formula by material and stirs
Stirring 15～20min in device, rotating speed is 500～800 r/min.In test preparation process, according to intensity, the friction system of brake block
Several pro rates to raw material are adjusted.
4, raw material injects: is put in the die cavity of mold closing by 3 D weaving preform, utilizes press injector former by mix
Material inject die cavity, utilize vacuum pump evacuation simultaneously, make raw material well into 3 D weaving preform, and primary solidification become
Type.Wherein injection pressure is 4.5Mpa.
5, squeeze cast form: after feeding injection in the die cavity equipped with 3 D weaving preform, in pressure head effect
Making raw material solidify, the extrusion equipment of use is YA32-100 type extruder, and wherein pressing speed is 7～10mm/s, and pressure is 50
～about 60MPa, hot pressing temperature is 180 DEG C, and pressing pressing time is 10～15 min.
The D braided composites that the present invention is prepared using coir as strengthening skeleton, and repeatedly orthogonal experiment to formula
In the pro rate of various raw materials be adjusted, utilize novel high-performance fiber to improve existing automobile brake sheet and be prone to fracture, table
The shortcoming of face be full of cracks, has ultimately formed the production technology formula of a kind of high-performance environment-friendly automobile brake sheet.This brake block is through tens of
The actual road test of platform automobile, the properties such as its coefficient of friction, wear rate, impact flexibility all reaches to use requirement.
Claims (2)
1. the brake block with coir as skeleton, it is characterised in that: in its formula, the mass ratio of each component is coir
16%, FKF compound mineral fiber 14%, aramid fiber fibril 6%, rare earth modified phenolic resin 12%, titanate coupling agents 2.5%, nonionic
Polyacrylamide 3.5%, fluorographite 3.5%, flexible coke 2.5%, molybdenum bisuphide 4%, scale aluminium powder 6%, tiny balloon powder 14%,
Calcium sulfate crystal whiskers 16%.
2. according to a kind of brake block with coir as skeleton described in claim 1, it is characterised in that: with coir as raw material,
Utilizing three dimensional knitting machine to be compiled into preform, be used as the enhancing skeleton of brake block, product thickness is about 35～40mm, porosity
It is 55%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610407609.XA CN106050990B (en) | 2016-06-12 | 2016-06-12 | It is a kind of using coir as brake block of skeleton and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610407609.XA CN106050990B (en) | 2016-06-12 | 2016-06-12 | It is a kind of using coir as brake block of skeleton and preparation method thereof |
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| CN106050990A true CN106050990A (en) | 2016-10-26 |
| CN106050990B CN106050990B (en) | 2018-08-31 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3891595A (en) * | 1972-08-30 | 1975-06-24 | Ici Ltd | Friction material |
| CN103267074A (en) * | 2013-05-16 | 2013-08-28 | 江西元邦摩擦材料有限责任公司 | Novel magnesium borate and calcium sulfate whisker composite cooperative reinforcement brake disc |
| CN103644231A (en) * | 2013-11-21 | 2014-03-19 | 桂林福冈新材料有限公司 | Automobile brake pad resistant to abrasion and high temperature |
| CN103836098A (en) * | 2013-12-21 | 2014-06-04 | 姜著川 | Car brake block mixed with piemarker fiber and preparing method of car brake block |
| CN103899694A (en) * | 2014-01-19 | 2014-07-02 | 姜著川 | Heavy truck brake pad and manufacturing method thereof |
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2016
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3891595A (en) * | 1972-08-30 | 1975-06-24 | Ici Ltd | Friction material |
| CN103267074A (en) * | 2013-05-16 | 2013-08-28 | 江西元邦摩擦材料有限责任公司 | Novel magnesium borate and calcium sulfate whisker composite cooperative reinforcement brake disc |
| CN103644231A (en) * | 2013-11-21 | 2014-03-19 | 桂林福冈新材料有限公司 | Automobile brake pad resistant to abrasion and high temperature |
| CN103836098A (en) * | 2013-12-21 | 2014-06-04 | 姜著川 | Car brake block mixed with piemarker fiber and preparing method of car brake block |
| CN103899694A (en) * | 2014-01-19 | 2014-07-02 | 姜著川 | Heavy truck brake pad and manufacturing method thereof |
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| CN106050990B (en) | 2018-08-31 |
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