CN100447181C - Environment-protection type high-performance automobile braking piece and making method - Google Patents
Environment-protection type high-performance automobile braking piece and making method Download PDFInfo
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- CN100447181C CN100447181C CNB2005100312396A CN200510031239A CN100447181C CN 100447181 C CN100447181 C CN 100447181C CN B2005100312396 A CNB2005100312396 A CN B2005100312396A CN 200510031239 A CN200510031239 A CN 200510031239A CN 100447181 C CN100447181 C CN 100447181C
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Abstract
The present invention relates to a preparing process for producing special articles by plastic material, particularly to automobile braking material and a preparing process thereof. The present invention is characterized in that adhesives, reinforcement fibers, frictional property regulating agents and inorganic fillers are mixed according to proportioning, the surface is processed by high-temperature resistant couplers, and environment protecting high-performance automobile brake blocks are produced through hot briquetting; automobile brake blocks made of asbestos fibers are replaced by the environment protecting high-performance automobile brake blocks which overcomes the defect of high-temperature regression of automobile brake blocks made of asbestos; the present invention has the advantages that integral frictional property of the brake blocks is enhanced, service life is prolonged, operating cost is reduced and environment is purified.
Description
Technical field:
The present invention relates to the material production particular product with plastic state, specifically is automobile brake material and preparation technology thereof.
Background technology:
Along with the raising of car speed, the increasing of weight-carrying capacity, the enhancing day by day of environmental consciousness, automobile industry has also proposed more and more higher requirement to the over-all properties of braking brake block.With the automobile brake brake facing that asbestos are made, at (about 300 ℃) under the condition of high temperature that produces after the scram, frictional coefficient can seriously descend, and causes the braking moment decline serious, influences traffic safety; And work-ing life is short, changes frequently, and this not only causes the operating cost height, and the dehydration asbestos dust that forms under high temperature wear, and human body is had very strong carcinogenesis, and environment is polluted.
Summary of the invention:
The objective of the invention is to: provide a kind of method to prepare environment-protection type high-performance automobile braking piece, substitute the automobile brake brake facing of making of fibrous magnesium silicate, to overcome the high temperature decline defective of asbestos automobile brake sheet, improve the whole frictional behaviour of brake facing, prolong its work-ing life, reduce operating cost, environment purification.
The preparation method of environment-protection type high-performance automobile braking piece of the present invention adopts tamanori, fortifying fibre, frictional property regulator, mineral filler to mix according to proportioning, utilizes high temperature resistant coupling molecule to carry out surface treatment, and concrete processing step is as follows:
A: batching, mixing:
By prescription each composition is prepared burden, then, carry out dry type with special mixer and mix, the assurance fiber fully disperses, evenly, and it is stand-by to make compound; Control mixing time: 5～40 minutes.
B: hot pressing moulding:
Adopt the compression moulding in metal die of malleation mode, controlled variable technology:
Temperature: 160 ± 5 ℃;
Pressure: 20 ± 10%Mpa;
Venting number of times: 4～6 times;
Dwell time: 1～8 minute.
C: thermal treatment:
With the product after hot-forming, again through Overheating Treatment, impel tamanori to reach best bonding state, treatment process is:
D: ground finish: utilize dry grinding equipment, product is worked into the drawing specified dimension.
E: surface spraying: utilize spraying equipment, the product non-rubbing surface is applied antirust coating.
F: seal mark, packing: press customer requirements, stamp specific sign, packed for standby use.
The composition of environment-protection type high-performance automobile braking piece of the present invention is by weight percentage:
Tamanori 4～15%, fortifying fibre 10～48%, frictional property regulator 5～40%, mineral filler 10～60%.
The preparation method of environment-protection type high-performance automobile braking piece of the present invention, its composition is:
Tamanori is: phenolic resinoid, polyamine lipid resin, redix;
Fortifying fibre is: steel fiber, copper fiber, aluminum fiber, aramid fiber, polyster fibre, carbon fiber, flaxen fiber, paper fiber, cellulosic fibre, rockwool coating resin fiber, aluminum silicate fiber, glass fibre, silicon ash cotton fibre, KFK conjugated fibre etc.;
Frictional property regulator is: Mohs' hardness is greater than 4.5 powder, as: chromite, quartz sand, aluminum oxide, silicon carbide, feldspar, magnetite, sulfurous iron ore, zircon etc.; Organic toughness reinforcing powder, as: nitrile rubber, tyre talc, organic friction agent etc.;
Various solid powder shape lubricants comprise soft metal, synthetic graphite, natural graphite, molybdenumdisulphide etc.;
Mineral filler is: Mohs' hardness is less than 4 ceramic powder, as: barium sulfate, antimony sulfide, kaolin, wilkinite, fluorite, lime carbonate, talcum powder, rhombspar, gypsum, mica, vermiculite, coral rock etc.
The environment-protection type high-performance automobile braking piece of method preparation of the present invention has overcome the high temperature decline defective of asbestos automobile brake sheets, improved the whole frictional behaviour of brake facing, substituted the automobile brake brake facing of making of fibrous magnesium silicate, prolong its work-ing life, reduce operating cost, purified environment.
Particular embodiment is as follows:
A. characteristic feature of an invention
(1) adopts multiple non-asbestos fiber, substitute the fibrous magnesium silicate dispersed, that affinity is good, utilize unique multiple high temperature resistant coupling molecule treatment technology, solved affinity (wettability) problem of non-asbestos fiber and matrix; In conjunction with the distinctive particular design of mixer internal structure, overcome the problem of uniting in the compound non-asbestos fiber mixing process, make fiber scattered in mixing process, solved defectives such as anti-insufficient strength, frictional behaviour instability in the brake facing that causes by above problem.
(2) owing to resin inherent elevated temperature heat resolution characteristic, resin content is too high in the automotive friction material, and then the high temperature decline is serious; And resin content is low excessively, and then bulk strength is not enough again.Adopt distinctive low levels resin matrix technology, the means such as crosslinked and anti-aging processing in conjunction with reinforcing rubber had both solved the toughness of material of product, improved the high temperature resistance decline performance of material, interior shear strength and ageing resistance again.
(3) utilize modern analytical technique, the basic research analysis is carried out in raw-material thermal property, phase transformation,, starting material are screened according to result of study.The constituent element that adopt Heat stability is good in the prescription, tails off mutually as key fillers such as process white, silicon gray cotton, rhombspars, has improved the resistance to elevated temperatures of brake facing; Utilize surperficial coupling technology, increase the consistency of filler and resin matrix, solved matrix, fiber, filler complex intensifying problem well, raising brake facing work-ing life.
(4) graphite material can reduce the brake facing abrasion loss, reduces brake oil, increases the brake stationarity, but more than 450 ℃, the quick oxidation of meeting causes problems such as high temperature decline and wearing and tearing increase.Adopt exclusive multicomponent lubrication technology, solved frictional interface barrier film, carbon-collecting problem, both played lubrication, do not produce the elevated temperature heat decline again, simultaneously, improve the brake facing wear resistance again.
(5) with porous raw materials such as the powder (as coal ash) of tiny balloon structure, expansion little molehill stones, utilize high temperature resistant binder to carry out the pre-mixing granulation, prepare distinctive powder porous composite particle, be applied in the brake facing, reach reduction brake facing proportion, reduce cost, suppress brake oil, reduce the effect that high temperature fails, improved the over-all properties of brake facing on the whole.Domestic and international auto-producing non-asbestos brake block, the decline of ubiquity high temperature is big, the poor toughness of materials processing, the problem of insufficient strength, and work-ing life is suitable with external like product.
(6) by basic research, a large amount of aboundresources, low-cost domestic raw materials of adopting, and, production cost is reduced significantly by process optimization, simplification production technique, product market price only is equivalent to 30% of similar imported product, has very strong domestic and international market competitive power.
B. the product performance of the present invention's production and the comparison of traditional asbestos product performance
High-performance newly developed, environment-friendly type brake facing, substitute asbestos product, do not contain harmful ingredients in the brake material, environmentally safe, and the high temperature resistance heat performance spy that declines is good, brake is sensitive, braking is steady, brakeless birdie, can satisfy the operating safety of automobile high-speed, high loading, and bring up to more than 2～3 times of asbestos product work-ing life
Asbestos and non-asbestos brake block product performance are (east wind EQ153 commercial car) relatively
From above data as can be seen, the non-asbestos brake block performance of Central South University and the exploitation of rich cloud novel material company is far superior to asbestos product.But it is on the cost, higher by about 20% than asbestos product.The compound cost of general asbestos friction material is at 3000～6000 yuan/ton, and asbestos-free friction material compound cost is at 4500～7000 yuan/ton, with east wind EQ153 brake is example, the sheet asbestos price: 11 yuan/sheet, and high-performance, non-asbestos brake block price: 14 yuan/sheet.Therefore, environment-friendly type, high-performance non-asbestos brake block are compared with traditional asbestos brake lining, have very high ratio of performance to price advantage.
Fundamentally solve the frictional property regulator three's of matrix, non-asbestos fiber and key complex intensifying problem, solved the decline of material high temperature resistance performance, brake facing intensity and wear resistance; Adopt the multicomponent lubrication technology, overcome defectives such as the high temperature decline that the graphite lubrication material causes at high temperature, wearing and tearing increase, solved frictional interface barrier film, carbon-collecting problem.
Description of drawings:
Fig. 1 is the process flow diagram of environment-protection type high-performance automobile braking piece of the present invention.
Embodiment:
A: Chang'an passenger car disc brake pad example:
1. by following prescription batching:
Resol 9%; Steel fiber 12%; Brass fiber 5%; Red copper fiber 3%; Aramid fiber 3%; Glass fibre 5%; Silicon gray cotton 6%; Synthetic graphite 5%; Natural graphite 5%; Chromite 8%; Sulfurous iron ore 8%; Magnetite 5%; Antimony sulfide 4%; Barium sulfate 10%; Rhombspar 5%; Calcium Fluoride (Fluorspan) 3%; Kaolin 4%;
2. utilize vertical mixer to mix, guarantee that each composition reaches uniform distribution;
3. utilize thermocompressor and specific frock, mould, compound is placed mould by certainweight, compression moulding;
4. utilizing high-power baking oven to carry out phenolic resin curing handles;
5. by drawing, to the product after the thermal treatment, carry out follow-up machining;
6. packing is put in storage.
B: Dongfeng Automobile EQ153 drum-type brake pad example
1. fill a prescription:
Resol 15%; Steel fiber 20%; Brass fiber 5%; Cellulosic fibre 3%; Glass fibre 5%; Rock wool 5%; FKF fiber 3%; Silicon gray cotton 5%; Synthetic graphite 4%; Natural graphite 6%; Chromite 4%; Magnetite 5%; Sulfurous iron ore 4%; Quartz sand 3%; Aluminum oxide 3%; Kaolin 5%; Wilkinite 3%; Vermiculite 2%.
2. utilize vertical mixer to mix, guarantee that each composition reaches uniform distribution;
3. utilize thermocompressor and specific frock, mould, compound is placed mould by certainweight, compression moulding;
4. utilizing high-power baking oven to carry out phenolic resin curing handles;
5. by drawing, to the product after the thermal treatment, carry out follow-up machining;
6. packing is put in storage.
C; Car Santana disc brake pad example
1. fill a prescription:
Resol 5%; Steel fiber 20%; Aramid fiber 2%; Red copper fiber 5%; Brass fiber 3%; Paper fiber 1%; Antimony sulfide 7%; Synthetic graphite 15%; Refinery coke 6%; Chromite 8%; Aluminum oxide 2%; Silicon gray cotton 9%; Barium sulfate 5%; Rhombspar 2%; Vermiculite 3%; Composite particles 7%.
2. utilize vertical mixer to mix, guarantee that each composition reaches uniform distribution;
3. utilize thermocompressor and specific frock, mould, compound is placed mould by certainweight, compression moulding;
4. utilizing high-power baking oven to carry out phenolic resin curing handles;
5. by drawing, to the product after the thermal treatment, carry out follow-up machining;
6. packing is put in storage.
Claims (2)
1, a kind of environment-protection type high-performance automobile braking piece, it is characterized in that: composition is tamanori 4～15% by weight percentage, fortifying fibre 10～48%, frictional property regulator 5～40%, mineral filler 10～60%, wherein tamanori is phenolic resinoid, polyamine lipid resin or redix; Fortifying fibre is steel fiber, copper fiber, aluminum fiber, aramid fiber, polyster fibre, carbon fiber, flaxen fiber, paper fiber, cellulosic fibre, rockwool coating resin fiber, aluminum silicate fiber, glass fibre, silicon ash cotton fibre or KFK conjugated fibre; Frictional property regulator is a Mohs' hardness greater than 4.5 powder: chromite, quartz sand, aluminum oxide, silicon carbide, feldspar, magnetite, sulfurous iron ore, zircon, in soft metal, synthetic graphite, natural graphite, the molybdenumdisulphide in the solid powder shape lubricant one or more contain organic toughness reinforcing powder or other organic friction agents of paracril, tyre talc; Mineral filler is a Mohs' hardness less than 4 ceramic powder: barium sulfate, antimony sulfide, kaolin, wilkinite, fluorite, lime carbonate, talcum powder, rhombspar, gypsum, mica, vermiculite or coral rock.
2, a kind of preparation method of environment-protection type high-performance automobile braking piece according to claim 1, be to adopt tamanori, fortifying fibre, frictional property regulator, mineral filler to mix according to proportioning, utilize high temperature resistant coupling agent to carry out surface treatment, it is characterized in that:
A: batching, mixing
By prescription each composition is prepared burden, then, carry out dry type with vertical mixer and mix, guarantee that fiber fully disperses, evenly, it is stand-by to make compound; Control mixing time: 5～40 minutes;
B: hot pressing moulding
Adopt the compression moulding in metal die of malleation mode, controlled variable technology:
Temperature: 160 ± 5 ℃,
Pressure: 20 ± 10%Mpa,
The venting number of times: 4～6 times,
Dwell time: 1～8 minute;
C: thermal treatment
With the product after hot-forming, again through Overheating Treatment, treatment process is:
Room temperature heats up and to reach 110 ℃ in 1 hour, in this temperature insulation insulation in 1 hour to 180 ℃ 5 hours that heated up again in 2 hours, heat up 30 minutes 210 ℃, be incubated 1 hour;
D: ground finish
Utilize the ground finish of dry grinding equipment;
E: surface spraying
Utilize spraying equipment, the product non-rubbing surface is applied antirust coating;
F: seal mark, packing
Stamp sign, packed for standby use.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100312396A CN100447181C (en) | 2005-02-02 | 2005-02-02 | Environment-protection type high-performance automobile braking piece and making method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100312396A CN100447181C (en) | 2005-02-02 | 2005-02-02 | Environment-protection type high-performance automobile braking piece and making method |
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| CN1814657A CN1814657A (en) | 2006-08-09 |
| CN100447181C true CN100447181C (en) | 2008-12-31 |
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| JP2003013044A (en) * | 2001-06-29 | 2003-01-15 | Aisin Seiki Co Ltd | Frictional material |
| CN1563735A (en) * | 2004-04-08 | 2005-01-12 | 广西科学院应用物理研究所 | Automotiv non-asbestos high strength braking friction disk, and its prodn. method |
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2005
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| CN1056506A (en) * | 1991-06-22 | 1991-11-27 | 北京市海淀东方石油机械技术公司 | Asbestos-free friction material and goods thereof |
| CN1075782A (en) * | 1993-03-03 | 1993-09-01 | 周侃 | Do not contain the asbestos braking material |
| CN1103142A (en) * | 1993-11-20 | 1995-05-31 | 申文清 | Once through moulding technology for brake disc assembly |
| CN1312196A (en) * | 2000-03-08 | 2001-09-12 | 上海交大贤华汽车材料发展有限公司 | Low steel fiber brake gland for vehicle and its preparation |
| JP2003013044A (en) * | 2001-06-29 | 2003-01-15 | Aisin Seiki Co Ltd | Frictional material |
| CN1563735A (en) * | 2004-04-08 | 2005-01-12 | 广西科学院应用物理研究所 | Automotiv non-asbestos high strength braking friction disk, and its prodn. method |
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| CN1814657A (en) | 2006-08-09 |
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