CN102206482A - Preparation method of carbon fiber brake block - Google Patents
Preparation method of carbon fiber brake block Download PDFInfo
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- CN102206482A CN102206482A CN2011100474146A CN201110047414A CN102206482A CN 102206482 A CN102206482 A CN 102206482A CN 2011100474146 A CN2011100474146 A CN 2011100474146A CN 201110047414 A CN201110047414 A CN 201110047414A CN 102206482 A CN102206482 A CN 102206482A
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Abstract
The invention relates to a preparation method of a carbon fiber brake block, relating to the technical field of automobile brake systems. Aiming at the problems of thermal conductivity and high-temperature controllability existing in the current asbestos-free organism-type (NAO type) automobile brake block, the invention provides the preparation method of the carbon fiber brake block which is prepared from the following raw materials including the following components in percentage by weight: 35-55% of carbon fiber, 15-35% of phenolic resin and 20-40% of powdery packing. The prepared carbon fiber brake block has thermal conductivity and electrical conductivity as well as thermal resistance and corrosion resistance of a metal material; and as the rise of temperature, the friction coefficient is kept constant and even is slightly increased, therefore, the carbon fiber brake block has very excellent brake stability.
Description
Technical field
The present invention relates to the brake system of car technical field, specifically relate to a kind of carbon fiber automobile brake sheet and preparation method thereof.
Background technology
Along with the enhancing of developing of automobile industry and people's awareness of safety, the vehicle braked problem is subject to people's attention gradually, and brake facing is the key part in the breaking system.Be used for arresting brake facing at present and mainly contain three classes: asbestos base brake facing, semi-metallic based brake facing and no asbestos organism type brake facing.Wherein, asbestos base brake facing produces easily carcinogenic asbestos dust in brake process, have a strong impact on health of people, except the factor of health risk aspect, asbestos type brake facing also exists another major issue, because asbestos are adiabatic, its capacity of heat transmission is poor especially, usually use stopper that heat is piled up in brake facing repeatedly, after the brake facing heating, its braking ability will change, produce same friction and damping force and can need the number of times that more touches on the brake, this phenomenon is called as " braking atrophy ", if brake facing reaches certain temperature, will cause brake failure.Semi-metallic based mixture type brake facing interior metal content is higher and intensity is big, high metal content has also changed the rubbing characteristics of brake facing simultaneously, typically referring to semi-metallic brake pad needs higher brake pressure to finish same braking effect, particularly high metal content just means that equally also brake facing can cause the bigger retarding disc or the surface abrasion of brake drum, can produce bigger noise simultaneously in low temperature environment.No asbestos organism type (NAO type) brake facing mainly uses glass fibre, the cruel fiber of fragrant adoption is cruel or other fiber is used as reinforcement material, its performance depends primarily on type and other interpolation mixture of fiber, with regard to performance, NAO type brake facing is more near asbestos brake lining, rather than semi-metallic brake pad, it has good thermal conductivity and good high-temperature controllability unlike semi-metallic brake pad.For China's braking brake block industry, NAO type prescription will be the main direction that we develop.
Carbon fiber is that a kind of carbon content is at the carbon materials with random graphits structure more than 90%, it not only has the wear-resistant self-lubricating of carbon materials, have the heat-conductivity conducting of metallic substance and the heat-and corrosion-resistant of stupalith again, carbon fiber also can be applicable on the automobile brake sheet because of its environmental protection, attrition resistant characteristics.
Publication number is the preparation method that the Chinese patent of CN101671465A discloses a kind of Resins, epoxy/ptfe composite, this invention is used to make automobile brake sheet, belong to no asbestos organism type (NAO type) brake facing, can reduce abrasion loss, increase work-ing life, the preparation method is simple, and cost is low, good manufacturability.But should invent the problem that solves no asbestos organism type (NAO type) brake facing thermal conductivity and high temperature controllability.
Summary of the invention
Exist the problem of thermal conductivity and high temperature controllability at present no asbestos organism type (NAO type) automobile brake sheet, the present invention proposes a kind of preparation method of carbon fiber brake facing, the carbon fiber brake facing of preparing has the heat-conductivity conducting and the heat-and corrosion-resistant of metallic substance; And along with temperature rising frictional coefficient remains unchanged even can slightly raise, thereby has very outstanding insensitivity.
Technical scheme of the present invention is: a kind of carbon fiber brake facing,
(1) powder filler is mixed by following each material component, and the weight percent of each material component is:
Copper powder 20 ~ 40%
Aluminum oxide 4 ~ 20%
Kaolin 20 ~ 40%
Talcum powder 10 ~ 20%
Graphite Powder 99 0 ~ 15%
Barium sulfate 0 ~ 15%
Iron powder 0 ~ 10%;
(2) the carbon fiber brake facing is prepared from by following each material component, and the weight percent of each material component is:
Carbon fiber 35 ~ 55%
Resol 15 ~ 35%
Powder filler 20 ~ 40%.
Carbon fiber is meant the inorganic polymer fiber of carbonaceous amount mark between 90% ~ 95%, is a kind of novel metalloid material, has characteristics such as high temperature resistant, corrosion-resistant, antifatigue, intensity height, fibre density be low.The main application of carbon fiber is compound with matrixes such as resin, metal, pottery, concrete, constitutes matrix material.Compare with traditional material, carbon fiber is a kind of novel material of mechanical property excellence, and the characteristic of its high strength (be common metal 3 ~ 5 times), high-modulus, low density (be common metal 1/4 ~ 1/5) makes it become loss of weight, enhanced best materials; Higher thermostability (inert stable to 2000 ℃, 400 ℃ of slow oxidationes in the air) and unreactiveness make it have anti-ablation and corrosion resistant advantage; Because carbon fiber possesses the soft workability of textile fibres, with metal, pottery, glass fibre etc. good affinity is arranged, and can adapt to the different component shape, convenient formation; In addition, carbon fiber also possesses characteristics such as fatigue resistance height, thermal expansivity is little, resistivity is little.
As preferably, described carbon fiber is selected from the PAN base carbon fibre.PAN (polyacrylonitrile) base carbon fibre not only has higher specific tenacity, excellent mechanical property such as specific modulus, and can guarantee that physical strength is unattenuated at 2000 ℃, not only density is low for its prepared carbon fiber brake facing, and braking is good, and anti-environment capacity is strong, and brake noise is low, and wear resistance is good.And along with temperature rising frictional coefficient remains unchanged even can slightly raise, thereby has very outstanding insensitivity.
A kind of preparation method of carbon fiber brake facing is following steps:
(1) with resol and dehydrated alcohol according to solute dissolved quantity of solvent is dissolved, make the resin ethanolic soln;
(2) carbon fibre tow is cut into the chopped strand that length is 1 ~ 5mm;
(3) with each component thorough mixing under homogenizer of powder filler, make mixed fillers; As preferably, the well-mixed time is 30min ~ 60min.
(6) in the banburying jar resin solution, chopped strand and mixed fillers are carried out thorough mixing then, the compound after the drying treatment is made profiled member through hot compression molding, makes the carbon fiber brake facing through aftertreatment again.As preferably, molding temperature is at 230 ~ 260 ℃, aftertreatment 1 ~ 4 hour, and temperature is 180 ~ 210 ℃.
The present invention is that to select the most superior PAN base carbon fibre of over-all properties for use be skeleton, resol is wedding agent, dehydrated alcohol is a thinner, fleuts such as copper powder mix, a kind of semi-metallic based carbon fiber brake facing is made in compression molding through pulverizing, adding, the excellent properties such as antiwear heat resisting of carbon fiber excellence have not only been effectively utilized, adopt other more general resin and fillers simultaneously, reduced the cost of carbon class brake facing effectively.
The present invention makes full use of the performance of carbon fiber excellence, provides a kind of with low cost, and manufacturing process is simple, and technical parameter and performance all can reach the semi-metallic based carbon fiber brake facing that the automobile use technology requires; And effectively utilized the excellent properties such as antiwear heat resisting of carbon fiber excellence, and adopt other more general resin and fillers simultaneously, reduced the cost of carbon class brake facing effectively.
Compared with prior art, the invention has the beneficial effects as follows not only have heat-conductivity conducting and heat-and corrosion-resistant; And along with temperature rising frictional coefficient remains unchanged even can slightly raise, thereby has very outstanding insensitivity; Environmental protection simultaneously, cost are lower.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Below in conjunction with embodiment and embodiment the present invention is described in further detail, raw material required for the present invention is commercial product.
Embodiment 1
(1) raw material of preparation carbon fiber brake facing: PAN base carbon fibre 45kg, resol 25kg, copper powder 9kg, aluminum oxide 3kg, the kaolin 10.5kg of the trade mark MXK201 of Inner Mongol Meng Xi powder limited-liability company, the talcum powder 5.4kg that Chengdu China credit chemical industry company limited produces, barium sulfate 2.1kg.
(2) be prepared according to the process flow sheet shown in the accompanying drawing 1.
A) resol and dehydrated alcohol are dissolved according to mass ratio 5:1, make the resin ethanolic soln.
B) PAN base carbon fibre tow is cut into the little chopped strand that length is 5mm.
C) simultaneously with copper powder 9kg, aluminum oxide 3kg, kaolin 10.5kg, talcum powder 5.4kg, powder filler thorough mixing 40min under homogenizer that barium sulfate 2.1kg forms makes mixed fillers 30kg.
D) then in the banburying jar with the resin ethanolic soln, weak point is cut base carbon fibre fiber 45kg and mixed fillers 30kg carries out thorough mixing, compound after the drying treatment is made profiled member through hot compression molding, molding temperature is 240 ℃, make the carbon fiber brake facing through aftertreatment again, post-processing temperature is 190 ℃, and the time is 4 hours.
Embodiment 2
(1) raw material of preparation carbon fiber brake facing: PAN base carbon fibre 50kg, resol 30kg, copper powder 7kg, aluminum oxide 3kg, the kaolin 7kg of the trade mark MXK201 of Inner Mongol Meng Xi powder limited-liability company, the talcum powder 2kg that Chengdu China credit chemical industry company limited produces, barium sulfate 1kg.
(2) be prepared according to the process flow sheet shown in the accompanying drawing 1.
A) resol and dehydrated alcohol are dissolved according to mass ratio 3:1, make the resin ethanolic soln.
B) PAN base carbon fibre tow is cut into the little chopped strand that length is 4mm.
C) simultaneously with copper powder 7kg, aluminum oxide 3kg, kaolin 7kg, talcum powder 2kg, powder filler thorough mixing 60min under homogenizer that barium sulfate 1kg forms makes mixed fillers 20kg.
D) then in the banburying jar with the resin ethanolic soln, weak point is cut base carbon fibre and mixed fillers carries out thorough mixing, compound after the drying treatment is made profiled member through hot compression molding, molding temperature is 260 ℃, make the carbon fiber brake facing through aftertreatment again, post-processing temperature is 200 ℃, and the time is 3 hours.
Embodiment 3
(1) raw material of preparation carbon fiber brake facing: PAN base carbon fibre 40kg, resol 20kg, copper powder 10kg, aluminum oxide 2kg, the kaolin 10kg of the trade mark MXK201 of Inner Mongol Meng Xi powder limited-liability company, the talcum powder 5kg that Chengdu China credit chemical industry company limited produces, Graphite Powder 99 5kg, barium sulfate 5kg, iron powder 3kg.
(2) be prepared according to the process flow sheet shown in the accompanying drawing 1.
A) resol and dehydrated alcohol are dissolved according to mass ratio 6:1, make the resin ethanolic soln.
B) PAN base carbon fibre tow is cut into the little chopped strand that length is 3mm.
C) simultaneously with copper powder 10kg, aluminum oxide 2kg, kaolin 10kg, talcum powder 5kg, barium sulfate 5kg, Graphite Powder 99 5kg, iron powder 3kg, the powder filler of composition is thorough mixing 30min under homogenizer, makes mixed fillers 40kg.
D) then in the banburying jar with the resin ethanolic soln, weak point is cut base carbon fibre and mixed fillers carries out thorough mixing, compound after the drying treatment is made profiled member through hot compression molding, molding temperature is 250 ℃, make the carbon fiber brake facing through aftertreatment again, post-processing temperature is 180 ℃, and the time is 2 hours.
Embodiment 4
(1) raw material of preparation carbon fiber brake facing: PAN base carbon fibre 35kg, resol 35kg, copper powder 8kg, aluminum oxide 3kg, the kaolin 8kg of the trade mark MXK201 of Inner Mongol Meng Xi powder limited-liability company, the talcum powder 5.kg that Chengdu China credit chemical industry company limited produces, Graphite Powder 99 3kg, barium sulfate 2.kg, iron powder 1kg.
(2) be prepared according to the process flow sheet shown in the accompanying drawing 1.
A) resol and dehydrated alcohol are dissolved according to mass ratio 4:1, make the resin ethanolic soln.
B) PAN base carbon fibre tow is cut into the little chopped strand that length is 1mm.
C) simultaneously with copper powder 8kg, aluminum oxide 3kg, kaolin 8kg, talcum powder 5kg, Graphite Powder 99 3kg, barium sulfate 2.kg, powder filler thorough mixing 50min under homogenizer that iron powder 1kg forms makes mixed fillers 30kg.
D) then in the banburying jar with the resin ethanolic soln, weak point is cut the base carbon fibre fiber and mixed fillers 30kg carries out thorough mixing, compound after the drying treatment is made profiled member through hot compression molding, molding temperature is 230 ℃, make the carbon fiber brake facing through aftertreatment again, post-processing temperature is 210 ℃, and the time is 1 hour.
The not only every index of the carbon fiber brake facing that the embodiment of the invention is made reaches the requirement of GB5763-1998, and automobile is when travelling under high-speed and high-temperature, and brake facing does not have that heat declines, heat expansion, hot tearing, free from environmental pollution.
Claims (5)
1. carbon fiber brake facing is characterized in that:
(1) powder filler is mixed by following each material component, and the weight percent of each material component is:
Copper powder 20 ~ 40%
Aluminum oxide 4 ~ 20%
Kaolin 20 ~ 40%
Talcum powder 10 ~ 20%
Graphite Powder 99 0 ~ 15%
Barium sulfate 0 ~ 15%
Iron powder 0 ~ 10%;
(2) the carbon fiber brake facing has following each feed composition to be prepared from, and the weight percent of each material component is:
Carbon fiber 35 ~ 55%
Resol 15 ~ 35%
Powder filler 20 ~ 40%.
2. a kind of carbon fiber brake facing according to claim 1, it is characterized in that: described carbon fiber is selected from the PAN base carbon fibre.
3. the preparation method of an a kind of carbon fiber brake facing as claimed in claim 1 or 2 is characterized in that, the preparation method is following steps:
(1) with resol and dehydrated alcohol according to solute dissolved quantity of solvent is dissolved, make the resin ethanolic soln;
(2) carbon fibre tow is cut into the chopped strand that length is 1 ~ 5mm;
(3) with each component thorough mixing under homogenizer of powder filler, make mixed fillers;
(4) then in the banburying jar with the resin ethanolic soln, weak point is cut base carbon fibre and mixed fillers carries out thorough mixing, the compound after the drying treatment is made profiled member through hot compression molding, makes the carbon fiber brake facing through aftertreatment again.
4. the preparation method of a kind of carbon fiber brake facing according to claim 3 is characterized in that: powder filler thorough mixing in the step (3), the time is 30min ~ 60min.
5. the preparation method of a kind of carbon fiber brake facing according to claim 3 is characterized in that: in the step (6) molding temperature at 230 ~ 260 ℃, aftertreatment 1 ~ 4 hour, temperature is 180 ~ 210 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011100474146A CN102206482A (en) | 2011-02-28 | 2011-02-28 | Preparation method of carbon fiber brake block |
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| CN2011100474146A CN102206482A (en) | 2011-02-28 | 2011-02-28 | Preparation method of carbon fiber brake block |
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| CN102206482A true CN102206482A (en) | 2011-10-05 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103352945A (en) * | 2013-05-27 | 2013-10-16 | 湖北飞龙摩擦密封材料股份有限公司 | Packaging bag for packaging friction material |
| CN103912618A (en) * | 2014-03-13 | 2014-07-09 | 中实洛阳工程塑料有限公司 | Manufacturing method of flame-retardant, anti-static and asbestos-free brake shoe |
| CN104179858A (en) * | 2014-07-29 | 2014-12-03 | 济源市金港特纤科技有限公司 | Brake pad enhanced with smelting slag and fly ash inorganic fibers as well as preparation method of brake pad |
| CN104471014A (en) * | 2012-07-04 | 2015-03-25 | 日清纺制动器株式会社 | Friction material |
| CN104946201A (en) * | 2014-03-31 | 2015-09-30 | 比亚迪股份有限公司 | Friction material, brake pad made of friction material, preparation method of brake pad, and vehicle |
| CN105778402A (en) * | 2016-03-17 | 2016-07-20 | 合肥晨煦信息科技有限公司 | Resin-based wear-resistant metal |
| CN108518432A (en) * | 2018-03-08 | 2018-09-11 | 山东金麒麟股份有限公司 | A kind of no copper NAO friction materials and its preparation method and application |
| CN111234449A (en) * | 2020-01-12 | 2020-06-05 | 宁国飞鹰汽车零部件股份有限公司 | Friction material composition of automobile brake pad |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1228448A (en) * | 1998-04-24 | 1999-09-15 | 吉林省广达摩擦制品有限公司 | Carbon fibre friction facing for brake device |
| CN1446875A (en) * | 2003-01-28 | 2003-10-08 | 西北工业大学 | Paper based friction material with carbon fibers enhanced and its preparation method |
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2011
- 2011-02-28 CN CN2011100474146A patent/CN102206482A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1228448A (en) * | 1998-04-24 | 1999-09-15 | 吉林省广达摩擦制品有限公司 | Carbon fibre friction facing for brake device |
| CN1446875A (en) * | 2003-01-28 | 2003-10-08 | 西北工业大学 | Paper based friction material with carbon fibers enhanced and its preparation method |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104471014A (en) * | 2012-07-04 | 2015-03-25 | 日清纺制动器株式会社 | Friction material |
| CN104471014B (en) * | 2012-07-04 | 2016-06-29 | 日清纺制动器株式会社 | Friction material |
| CN103352945A (en) * | 2013-05-27 | 2013-10-16 | 湖北飞龙摩擦密封材料股份有限公司 | Packaging bag for packaging friction material |
| CN103352945B (en) * | 2013-05-27 | 2015-04-08 | 湖北飞龙摩擦密封材料股份有限公司 | Packaging bag for packaging friction material |
| CN103912618A (en) * | 2014-03-13 | 2014-07-09 | 中实洛阳工程塑料有限公司 | Manufacturing method of flame-retardant, anti-static and asbestos-free brake shoe |
| CN104946201A (en) * | 2014-03-31 | 2015-09-30 | 比亚迪股份有限公司 | Friction material, brake pad made of friction material, preparation method of brake pad, and vehicle |
| CN104179858A (en) * | 2014-07-29 | 2014-12-03 | 济源市金港特纤科技有限公司 | Brake pad enhanced with smelting slag and fly ash inorganic fibers as well as preparation method of brake pad |
| CN105778402A (en) * | 2016-03-17 | 2016-07-20 | 合肥晨煦信息科技有限公司 | Resin-based wear-resistant metal |
| CN108518432A (en) * | 2018-03-08 | 2018-09-11 | 山东金麒麟股份有限公司 | A kind of no copper NAO friction materials and its preparation method and application |
| CN111234449A (en) * | 2020-01-12 | 2020-06-05 | 宁国飞鹰汽车零部件股份有限公司 | Friction material composition of automobile brake pad |
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Application publication date: 20111005 |