CN104088933B - Without the micro-metal polycrystalline fibre of asbestos drum brake for automobile liner - Google Patents

Without the micro-metal polycrystalline fibre of asbestos drum brake for automobile liner Download PDF

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Publication number
CN104088933B
CN104088933B CN201410257171.2A CN201410257171A CN104088933B CN 104088933 B CN104088933 B CN 104088933B CN 201410257171 A CN201410257171 A CN 201410257171A CN 104088933 B CN104088933 B CN 104088933B
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fibre
powder
drum brake
cashew nut
batching
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CN104088933A (en
Inventor
周怀良
安忠文
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FUJIAN GUANLEAN AUTOMOTIVE PARTS INDUSTRY Co Ltd
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FUJIAN GUANLEAN AUTOMOTIVE PARTS INDUSTRY Co Ltd
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Abstract

The present invention is open a kind of without the micro-metal polycrystalline fibre of asbestos drum brake for automobile liner, does is the formula of described drum brake lining of city each component: cashew nut oil modified alkyd resin? 10~15; PNBR? 3~6; Polycrystalline mullite fibre? 5~8; Wood fibre 10~20; Polyacrylonitrile fibre 2~8; Cashew nut shell oil friction powder 2~10; Blanc fixe 5~15; Graphite? 3~18; Zirconium English powder 1~10; Other fillers 16~23. Production technology is for to mix described component through automatic mixing machine, the material finally forming takes after aequum by the required specification of drum brake lining of city, and cold moudling is cold base, after hot-forming, heat treatment and grinding, boring step, is processed into finished product. The main feature of these formula goods is: stable friction factor, soft, brake sensitive, comfortable, noiselessness, meet environmental requirement. The properties requirement requiring while meeting automobile brake, is used safety, comfortable steady, environmentally safe.

Description

Without the micro-metal polycrystalline fibre of asbestos drum brake for automobile liner
Technical field
The invention belongs to brake system of car technical field, relate in particular to a kind of drum brake for automobile liner production and joinSide.
Background technology
Brake block is one of requisite accessories of motor vehicles such as automobile, is a kind of composite, and it is mainly by boningAgent, reinforcing material, filler three part compositions. Before eighties of last century nineties, reinforcing material used is mainly taking asbestos as main, andAsbestos can cause environmental pollution and harm health of human body. Along with auto industry fast development, auto parts machinery buying also becomes the whole worldChange the trend of development, the consumption of brake facing increases year by year, and its performance is also proposed to higher requirement. For with the worldMarket integrates with, and domestic automobile friction material industry is researched and developed one after another without asbestos product, has wherein invented a lot of other fiber generationsFor asbestos, however the hardness that have the drum brake lining of city of much making to have in these formulas high, injure antithesis, some high temperature is resistance toMill property is poor etc.
Summary of the invention
The object of the present invention is to provide a kind of life without the micro-metal polycrystalline fibre of asbestos drum brake for automobile linerProduce formula and production technology thereof, not only solved the problem that uses asbestos to cause environmental pollution and harm health of human body, can keep away againExempt to use high strength fibre cause product hardness too high, injure the disadvantages such as antithesis. Its goods major advantage is: coefficient of friction is steadyFixed, soft, brake sensitive, comfortable, noiselessness, meet environmental requirement.
The object of the present invention is achieved like this, and described serves as a contrast without the micro-metal polycrystalline fibre of asbestos drum brake for automobileSheet, it is made up of the raw material of following weight percentage proportioning:
Weight percentages of components (%)
Cashew nut oil modified alkyd resin 10~15;
PNBR 3~6;
Polycrystalline mullite fibre 5~8;
Wood fibre 10~20;
Polyacrylonitrile fibre 2~8;
Cashew nut shell oil friction powder 2~10;
Blanc fixe 5~15;
Graphite 3~18;
Zirconium English powder 1~10;
Sulphur 0.6~1.8;
Vulcanization accelerator TMTD 0.021~0.042;
Antioxidant d 0.06~0.12;
Zinc stearate 0.06~0.7;
Chromite powder 5~7;
Molybdenum bisuphide 1~3;
Expanded vermiculite 4~6;
Calcined coke powdered carbon 6~9;
Large red powder thermosetting 1~3.5.
Production method without the micro-metal polycrystalline fibre of asbestos drum brake for automobile liner of the present invention, comprisesFollowing steps:
1) batching
Premix one: press raw material proportioning, weigh up zinc stearate and polycrystalline mullite fibre, wood fibre, polyacrylonitrile fibreDimension is poured in vertical shaft type high speed mixer, adjusts the speed of mainshaft, stirs, and makes the abundant shredding of fiber, and discharge material is premixOne is stand-by;
Premix two: press raw material proportioning, weigh up cashew nut oil modified alkyd resin, PNBR, cashew nut shell oil and rubCrocus, blanc fixe, graphite, zirconium English powder, sulphur, vulcanization accelerator TMTD, antioxidant d, chromite powder, molybdenum bisuphide, expansionVermiculite, calcined coke powdered carbon, large red powder thermosetting are put in batch mixer and are fully stirred, evenly mix, and then willThe material of premix one adds, and continues to be stirred to abundant mixing and obtains batching;
2) preformed
Press the required specification of drum brake lining of city, in the batching of step 1), take after aequum, pressure 10~At 60~70 DEG C of 15Mpa, temperature, carrying out cold moudling is cold base;
3) hot-forming
By step 2) the cold base that suppresses is by 300 tonnage single-layer hot presses, is 5 in pressure 25~35Mpa, dwell timeHot-forming at 150~160 DEG C of~7min, temperature;
4) heat treatment
The hot press formed product that step 3) is obtained is heat-treated at 130~170 DEG C of temperature;
5) product step 4) being obtained is processed into finished product after grinding, boring step.
Specifically, process of the present invention: first weigh various raw materials by the material rate of regulation in formula, step by stepPremix.
Premix one: by vertical to entering to the zinc stearate weighing up and polycrystalline mullite fibre, wood fibre, polyacrylonitrile fibreIn shaft type high speed mixer, adjust the speed of mainshaft, stir 10 minutes, make the abundant shredding of fiber, discharging material is premix oneStand-by.
Premix two: the resin-oatmeal, rubber powder, the filler that specify in formula are put in batch mixer and carried out fully stirring 5~10 minutes, evenly mix, and then the material of premix one is added, continue to be stirred to abundant mixing and obtain batching. HereBatch mixing object is to make fiber to mix in two steps, avoids material to meet group, thereby improves products appearance, improves goods and rubsWipe polishing machine.
Take after the batching of aequum by the required specification of drum brake lining of city, in pressure (Mpa), the time of regulation(min), temperature (DEG C) under to carry out cold moudling be cold base, by the cold base suppressing by hot press, at the pressure of regulation(Mpa), time (min), temperature (DEG C) lower hot-forming, through the temperature of regulation (DEG C), the time (h) enters hot-forming goodsRow heat treatment is then processed into finished product after grinding, boring step.
The effect of the part of wherein filling a prescription component is as follows:
1) cashew nut oil modified alkyd resin: binding agent is commercially available prod, the present invention adopts sea, Shandong Butterworth company to produceProduct, it can all be bonded in various fiber reinforcement materials, filler and auxiliary material etc. in friction material uniformlyTogether, through heating, pressurization, curing molding, become compact structure, meet the friction material that the every serviceability of friction material requiresEntirety.
2) PNBR: bonding agent is commercially available prod. Acrylonitrile-butadiene rubber has good tensile strength and heat resistance,Quality softness, low temperature frictional behaviour is better, can reduce braking chatter and noise. And PNBR advantage is: easy to use,Can directly mix use with resin, fiber, filler etc., its consumption is not limited by process conditions, can be according to products machinery intensity, hardThe requirement of degree and other performance, regulates its consumption how many.
3) polycrystalline mullite fibre: be commercially available prod, the product that the present invention adopts Ke Lei crystal fibre Co., Ltd to produce,The principal crystalline phase of polycrystalline mullite fibre is single mullite phase, is at high temperature to use in polycrystalline alumina fiber, thermally-stabilisedThe one that property is best, the product of serviceability temperature more than 1400 DEG C. Polycrystalline mullite fibre is micro-by refractory metal oxideThe fiber that crystal group forms, the main district of it and common refractory fibre (glass fibre, mineral wool, alumina silicate fibre, high aluminum fiber)Do not see the following form 1:
Table 1
4) wood fibre, is commercially available prod, the product that the present invention adopts Langfang Sheng Xianglong energy-saving material Co., Ltd to produce,This fiber has powerful crosslinked function, when and other material can become network structure between fiber after mixing, can improve systemThe physical and mechanical properties of product. In addition, the dimensional stability of wood fibre is very good, can improve goods crack resistance.
5) polyacrylonitrile fibre, is commercially available prod, and the present invention adopts East China, Wujin special fibre Manufacturing Co., Ltd to produceProduct, polyacrylonitrile fibre is the fibre-grade product that polypropylene chip is made through spinning, drawing process, has high temperature resistant, resistance toThe excellent properties such as burn into creep resistant, use this fiber can improve goods high temperature friction performance of the present invention, can also reduce abrasion,Improve impact strength.
6) cashew nut shell oil friction powder, is commercially available prod, and the present invention adopts hero bio tech ltd, Yantai, Shandong rawThe product producing, it is to improve the frictional behaviour of friction material goods and reduce noise in effect of the present invention.
7) blanc fixe, is commercially available prod, and it is to stablize coefficient of friction in effect of the present invention, reduces abrasion, particularlyAt high temperature, can form stable friction interlayer, to prevent mating material galled spots, make antithesis surface grind brighter and cleanlyer.
8) graphite, antifriction material. Matter is soft, has good conduction, heat conduction and resistance to elevated temperatures. And native graphite, as phosphorusSheet graphite, lubricity is good, and antifriction function is good, can make that friction surface conducts heat, radiating rate is fast, brakes soft.
9) zirconium English powder, is commercially available prod, and it is the hardness that regulates friction material goods in effect of the present invention, and conventionallyAs increasing rub filler use.
10) conditioning agent has sulphur, vulcanization accelerator TMTD and antioxidant d, and sulfur consumption is rubber mass 20~30%, sulphur0.7% left and right that to change Vulcanization accelerator TMTD (claiming again Vulcanization accelerator TMTD) consumption be rubber mass, antioxidant d consumption is rubber mass 2%.In the present invention, the product that sulphur adopts Foochow industrial chemicals Co., Ltd to produce, vulcanization accelerator TMTD adopts hat source light industryThe product of Products Co., Ltd, antioxidant d adopts the product of Guangzhou Dong Xin Chemical Co., Ltd., and they are at work of the present inventionWith being the physical and mechanical properties of improving rubber.
11) zinc stearate, is commercially available prod, and it is mainly to prevent that fiber from meeting group in the present invention, help fiber open loose, fromAnd performance and the outward appearance of raising goods.
12) other fillers have chromite powder, molybdenum bisuphide, expanded vermiculite, calcined coke powdered carbon and large red powder thermosetting,There is no special ratios relation, consumption is pressed the given scope of claims 1. In the present invention, chromite powder adopts yellowThe product that building materials mineral products company of stone city produces, it has in the present invention good low temperature and high temperature increases the effect of rubbing; Molybdenum bisuphideThe product that adopts the Gao of Zhongshan city lubriation material Co., Ltd to produce, the crystal structure that it is unique, is used as and subtracts in the present inventionThe filler that rubs uses to regulate goods coefficient of friction; Expanded vermiculite adopt Lingshou County rise mineral products processing factory produce product,In the present invention, can effectively reduce product braking noise and proportion; Calcined coke powdered carbon adopts Lingshou County Hao Tai mineral products processing factory to produceProduct, it has loose structure, can reduce product braking noise in the present invention; Large red powder thermosetting is commercially available productProduct, can adopt the product of Hangzhou Jin Ying molding powder Co., Ltd or the like product of other company, are mainly used in regulating friction materialThe color of material products.
The invention has the beneficial effects as follows: the needs that the present invention hurries up according to bogie user Duola, correspondingly also require to stopThe indexs such as the braking of car sheet is sensitive, high temperature resistant, long service life, the present invention requires to set about from environmental protection, few metal, rationally adopts a kind ofPolycrystalline fibre is reinforcing material, for avoiding fibrous caking or destroyed, also will adjust mixing equipment in the time adjustingRotating speed, makes material performance embody optimum state, develops a kind of without the micro-metal polycrystalline fibre of asbestos drum brake for automobileLiner, the main feature of formula goods of the present invention is: stable friction factor, heat resistanceheat resistant decline, brake sensitive, comfortable, noiselessness,Long service life, meets environmental requirement.
Detailed description of the invention
Illustrate: in production process and equipment and the identical situation of technological parameter, goods taking 15mm thickness asExample, carries out two groups of tests, and raw material consumption is except polycrystalline mullite fibre and common refractory fibre, and other consumption is identical,In example 1, add polycrystalline mullite fibre, (being glass fibre, is a kind of reinforcing material, adopts in example 2, to add common refractory fibreThe product that Danyang Zhenxing Glass Fiber Products Co., Ltd. produces), carry out contrast test, concrete data are in table 2); Technique of the present inventionMethod: first weigh various raw materials, step by step premix by the material rate of regulation in formula.
1) batching
Premix one: by the raw material proportioning in example 1 or example 2 (concrete numerical value is in table 2), weigh up zinc stearate and exampleThe glass fibre of 1 polycrystalline mullite fibre or example 2, wood fibre, polyacrylonitrile fibre are poured vertical shaft type high speed mixer intoIn, adjust the speed of mainshaft, stir 10 minutes, make the abundant shredding of fiber, discharging material is that premix one is stand-by.
Premix two: by the raw material proportioning in example 1 or example 2 (concrete numerical value is in table 2), weigh up cashew nut oil modified phenolUrea formaldehyde, PNBR, cashew nut shell oil friction powder, blanc fixe, graphite, zirconium English powder, conditioning agent (sulphur, sulfuration promotionAgent TMTD, antioxidant d---concrete numerical value is in table 2), other fillers (chromite powder, molybdenum bisuphide, expanded vermiculite, calcined cokePowdered carbon, large red powder thermosetting---concrete numerical value is in table 2) put in batch mixer and carry out fully stirring 13 minutes, evenlyMix, and then the material of premix one is added, continue to be stirred to abundant mixing and obtain batching.
Here batch mixing object is to make fiber to mix in two steps, avoids material to meet group, thereby improves outside goodsSee, improve goods friction and wear behavior.
2) preformed
Take by the drum brake lining of city specification of this area routine after the batching (2 kilograms) of the step 1) of aequum,At 65 DEG C of pressure 13Mpa, the temperature of regulation, carrying out cold moudling is cold base.
3) hot-forming
By the cold base suppressing by 300 tonnage single-layer hot presses, pressure 30Mpa, the dwell time of regulation be 6min,Hot-forming at 155 DEG C of temperature.
4) heat treatment
150 DEG C of temperature, time 20h through regulation heat-treat hot-forming goods.
5) then after grinding, boring step, be processed into finished product.
In production process and equipment and the identical situation of technological parameter, the drum brake lining of city system makingProduct are taking 15mm thickness as example, by same formula being added to polycrystalline fibre and common refractory fibre carries out contrast test, specifically formulaData are in table 2.
Table 2
The drum brake lining of city sample made is through series of experiments, and concrete result of the test is as follows, see the following form 3, table 4 andTable 5:
Table 3 impact strength, hardness test
The test of table 4 constant speed frictional behaviour
The test of table 5CHASE friction and wear behavior
From above-mentioned test data, its coefficient of friction of drum brake lining of city product of the present invention and wear rate all meetNational standard, especially hot stage stable friction performance, wear rate is low, does not occur the phenomenons such as foaming, crackle, expansion.
Although embodiment of the present invention are open as above, it is not restricted in description and embodiment listedUse, it can be applied to various applicable the field of the invention completely, for those skilled in the art, and can be easilyRealize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention does not limitIn specific details with illustrate here and the example of describing.

Claims (2)

1. without the micro-metal polycrystalline fibre of an asbestos drum brake for automobile liner, it is former by following weight percentage proportioningMaterial is made:
Weight percentages of components (%)
Cashew nut oil modified alkyd resin 10~15;
PNBR 3~6;
Polycrystalline mullite fibre 5~8;
Wood fibre 10~20;
Polyacrylonitrile fibre 2~8;
Cashew nut shell oil friction powder 2~10;
Blanc fixe 5~15;
Graphite 3~18;
Zirconium English powder 1~10;
Sulphur 0.6~1.8;
Vulcanization accelerator TMTD 0.021~0.042;
Antioxidant d 0.06~0.12;
Zinc stearate 0.06~0.7;
Chromite powder 5~7;
Molybdenum bisuphide 1~3;
Expanded vermiculite 4~6;
Calcined coke powdered carbon 6~9;
Large red powder thermosetting 1~3.5.
2. the production method without the micro-metal polycrystalline fibre of asbestos drum brake for automobile liner claimed in claim 1, comprisesFollowing steps:
1) batching
Premix one: press raw material proportioning, weigh up zinc stearate and polycrystalline mullite fibre, wood fibre, polyacrylonitrile fibreEnter in vertical shaft type high speed mixer, adjust the speed of mainshaft, stir, make the abundant shredding of fiber, discharging material is that premix one is treatedWith;
Premix two: press raw material proportioning, weigh up cashew nut oil modified alkyd resin, PNBR, cashew nut shell oil friction powder,Blanc fixe, graphite, zirconium English powder, sulphur, vulcanization accelerator TMTD, antioxidant d, chromite powder, molybdenum bisuphide, expanded vermiculite,Calcined coke powdered carbon, large red powder thermosetting are put in batch mixer and are fully stirred, evenly mix, and then by premixOne material adds, and continues to be stirred to abundant mixing and obtains batching;
2) preformed
Press the required specification of drum brake lining of city, in the batching of step 1), take after aequum, in pressure 10~15Mpa, temperatureAt spending 60~70 DEG C, carrying out cold moudling is cold base, and the batching of described step 1) refers to after premix two steps of step 1)The batching obtaining;
3) hot-forming
By through step 2) the cold base that cold moudling suppresses that carries out at 60~70 DEG C of pressure 10~15Mpa, temperature pass through300 tonnage single-layer hot presses are hot-forming at 150~160 DEG C of 5~7min, temperature in pressure 25~35Mpa, dwell time;
4) heat treatment
By the hot pressing obtaining at pressure 25~35Mpa, dwell time are 150~160 DEG C of 5~7min, temperature through step 3)Shaped article is heat-treated at 130~170 DEG C of temperature;
5) by through the product of heat-treating acquisition at 130~170 DEG C of temperature of step 4) through grinding, after boring stepBe processed into finished product.
CN201410257171.2A 2014-06-11 2014-06-11 Without the micro-metal polycrystalline fibre of asbestos drum brake for automobile liner Active CN104088933B (en)

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CN105650157A (en) * 2014-11-30 2016-06-08 衡阳市安骋汽车配件有限公司 Particles having noise reduction and high-temperature declining resistance functions and preparation method of particles
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CN105650169A (en) * 2014-11-30 2016-06-08 衡阳市安骋汽车配件有限公司 Granules with noise reduction function and large porosity and preparation method of granules
CN104533998A (en) * 2014-12-28 2015-04-22 福建冠良汽车配件工业有限公司 Non-asbestos micro-metal mineral fiber disk type brake block for automobile
CN105041926A (en) * 2015-05-21 2015-11-11 江苏普华力拓摩擦材料有限公司 Little-dust and low-metal friction material and preparation method thereof
CN105864331B (en) * 2016-06-01 2018-03-20 江苏金麦穗新能源科技股份有限公司 A kind of building waste inserts brake block friction material production technology
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