CN102794912B - Preparation method of friction material for vehicle brake disc - Google Patents
Preparation method of friction material for vehicle brake disc Download PDFInfo
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- CN102794912B CN102794912B CN201210305714.4A CN201210305714A CN102794912B CN 102794912 B CN102794912 B CN 102794912B CN 201210305714 A CN201210305714 A CN 201210305714A CN 102794912 B CN102794912 B CN 102794912B
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Abstract
The invention discloses a preparation method of a friction material for a vehicle brake disc, which is characterized in that: the friction material comprises the following components: 23-27 parts by weight of a thermosetting resin, 6-8 parts by weight of a resin curing agent, 10-12 parts by weight of an alumina fiber, 4-6 parts by weight of a potassium titanate whisker, 2-4 parts by weight of an attapulgite, 5-7 parts by weight of a chromite powder, 6-8 parts by weight of a calcium silicate ceramic powder, 8-10 parts by weight of barium sulfate, 2-4 parts by weight of colloidal molybdenum disulfide, 3-5 parts by weight of a talc, and 8-10 parts by weight of a flake graphite; the preparation method comprises the following steps: 1) weighting the raw materials according to the above weight ratio, firstly mixing the attapulgite, the chromite powder, the calcium silicate ceramic powder, the barium sulfate, and the talc, and then adding the colloidal molybdenum disulfide into the mixture and finally adding the graphite into the mixture, so as to obtain a mixture material; 2) mixing the resin curing agent, the thermosetting resin, the alumina fiber, and the potassium titanate whisker, and then adding the mixture material obtained by the step 1) into the mixture, so as to obtain a friction material mixture; 3) pressing the friction material mixture into a green body, and compression molding the green body.
Description
Technical field
The present invention relates to field of compound material, particularly a kind of preparation method of Friction material for auto brake pad.
Background technology
Along with the fast development of auto industry, automobile pollution is also in continuous expansion.Automobile brake sheet is as the critical component of brake system of car, and need meet brake safe reliable, operate steadily noiseless requirement.Current domestic automotive friction material type can be divided into three kinds: 1) asbestos base: its low cost of manufacture, and technique is simple; Be mainly used in agricultural vehicle and engineering machinery.Its shortcoming existed: asbestos are harmful, contaminated environment, high-temperature hot decline is serious, poor stop, and safety coefficient is little, and this kind of product is reducing year by year, belongs to obsolete product.2) semi-metallic based: have good temperature tolerance and at high temperature resistance to decline performance, manufacturing cost is moderate; Domestic application is more extensive.Its shortcoming existed: the hardness of product is high, braking time have noise, particularly low speed braking or morning effect easily produce noise, product surface easily gets rusty, corrode mating plate simultaneously, thermal conductivity factor is high, when friction temperature is higher than 300 DEG C, easily makes the adhesive between friction material and steel disc decompose, on the other hand high friction heat is transmitted to rapidly brake hydraulic mechanism, causes the aging and brake fluid generation vapour lock of hydraulic pressure " O " RunddichtringO and causes brake fade.3) few Metal Substrate: advantage is less to the aggressiveness of dish drum, and noise is little, wears away relatively semi-metallic based little; Car use more.The shortcoming existed: noise and the grey problem that falls still do not solve, easy-to-rust.The development trend of external automotive friction material is based on ceramic base, ceramic-based friction material is invented by Japanese friction material enterprise, advantage is that high temperature heat-resistant fails, anti-wear performance is excellent, the coefficient of heat conduction is little, intensity is high, environmental protection, is applicable to very much the brake request of high-performance passenger car.Current ceramic-based friction material has occupied two large Main Auto markets, the whole world---more than 60% of North America and Japanese market.
But domestic ceramic-based friction material brake block is also immature, and its properties of product can't meet user demand.
Summary of the invention
For the deficiencies in the prior art, an object of the present invention is the preparation method providing a kind of Friction material for auto brake pad.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of preparation method of Friction material for auto brake pad, this friction material is made up of following component with parts by weight: thermosetting resin 23-27 part, resin curing agent 6-8 part, alumina fibre 10-12 part, potassium titanate crystal whisker 4-6 part, attapulgite 2-4 part, chromite powder 5-7 part, calcium silicates ceramic powder 6-8 part, barium sulfate 8-10 part, colloid molybdenum bisuphide 2-4 part, talcum 3-5 part, flake graphite 8-10 part; Described preparation method comprises the steps:
1) by above-mentioned weight proportion weighing, then attapulgite, chromite powder, calcium silicates ceramic powder, barium sulfate, talcum are put into batch mixer and mixed about 2-4 hour, then add colloid molybdenum bisuphide and mix about 1-2 hour again, then add flake graphite and mix about 1-2 hour again, prepare powder compound for subsequent use;
2) thermosetting resin, resin curing agent, alumina fibre and potassium titanate crystal whisker mix and blend are about 1-3 hour, then add step 1) compound prepared, then stir about 2-4 hour, obtain friction material compound;
3) by step 2) the friction material compound that obtains is pressed into base substrate, then at about 180-190 DEG C, mold pressing 13-17 minute under the pressure of 15-25MPa, then at 195-205 DEG C heat treatment 10-14 hour.
In the present invention, said thermosetting resin can be one or more in phenolic resins, boron modified phenolic resin, melamine modified phenolic resin and aralkyl modified phenolic resins.
Said resin curing agent can be one or more in hexamethylenetetramine, sulphur and methenamine.
The present invention has following beneficial effect:
1) the optimum choice of the present invention material of friction component and lubricant component, the combination of material ceramic powder, fiber and whisker as friction group member, and on the basis of great many of experiments, reasonably have selected the ratio of each component, make alumina fibre, potassium titanate crystal whisker, attapulgite, chromite powder and calcium silicates ceramic powder can play coordinative role effect at friction material duration of work, namely reasonably allocate coefficient of friction, make it stable suitable, again reduce wearing and tearing, and stable working, noiselessness.Heat conduction efficiency is good, and braking quality is stablized, safe and reliable.
2) preparation method of the present invention is by the characteristic repeatedly substep mixing of component, particularly the colloid molybdenum bisuphide not easily mixed and the follow-up gradation of graphite is added, adds respectively again, make the powder mixture uniformity prepared after the mixing of other powder.Fiber and crystal whisker materials are mixed with resin, then it is mixed with powder mixture, finally ensure that the Homogeneous phase mixing of friction material compound.Then according to feature and the ratio of selected each component, the basis of great many of experiments optimizes temperature and pressure of hot pressing and heat treated temperature and time, thus make the Properties of Friction Materials of preparation excellent.Utilize the distinctive wear-resistant property of ceramic material, on the basis of stable friction material coefficient of friction, effectively reduce its wear rate, thus improve the service life of friction material.
Detailed description of the invention
Embodiment one
A kind of preparation method of Friction material for auto brake pad, this friction material is made up of following component with parts by weight: 23 parts, phenolic resins, hexamethylenetetramine 8 parts, alumina fibre 10 parts, potassium titanate crystal whisker 6 parts, attapulgite 2 parts, chromite powder 7 parts, calcium silicates ceramic powder 6 parts, 10 parts, barium sulfate, colloid molybdenum bisuphide 2 parts, 5 parts, talcum, flake graphite 8 parts; Described preparation method comprises the steps:
1) by above-mentioned weight proportion weighing, then attapulgite, chromite powder, calcium silicates ceramic powder, barium sulfate, talcum are put into batch mixer and mixed about 2 hours, then add colloid molybdenum bisuphide and mix about 2 hours again, then add flake graphite and mix about 1 hour again, prepare powder compound for subsequent use;
2) by phenolic resins, hexamethylenetetramine, alumina fibre and potassium titanate crystal whisker mix and blend about 1 hour, then step 1 is added) compound prepared, then stir about 4 hours, obtain friction material compound;
3) by step 2) the friction material compound that obtains is pressed into base substrate, then about 180 DEG C, mold pressing 13 minutes under the pressure of 25MPa, then heat treatment 10 hours at 205 DEG C.
Embodiment two
A kind of preparation method of Friction material for auto brake pad, this friction material is made up of following component with parts by weight: boron modified phenolic resin 27 parts, 6 parts, sulphur, alumina fibre 12 parts, potassium titanate crystal whisker 4 parts, attapulgite 4 parts, chromite powder 5 parts, calcium silicates ceramic powder 8 parts, 8 parts, barium sulfate, colloid molybdenum bisuphide 4 parts, 3 parts, talcum, flake graphite 10 parts; Described preparation method comprises the steps:
1) by above-mentioned weight proportion weighing, then attapulgite, chromite powder, calcium silicates ceramic powder, barium sulfate, talcum are put into batch mixer and mixed about 4 hours, then add colloid molybdenum bisuphide and mix about 1 hour again, then add flake graphite and mix about 2 hours again, prepare powder compound for subsequent use;
2) by boron modified phenolic resin, sulphur, alumina fibre and potassium titanate crystal whisker mix and blend about 3 hours, then step 1 is added) compound prepared, then stir about 2 hours, obtain friction material compound;
3) by step 2) the friction material compound that obtains is pressed into base substrate, then about 190 DEG C, mold pressing 17 minutes under the pressure of 15MPa, then heat treatment 14 hours at 195 DEG C.
Embodiment three
A kind of preparation method of Friction material for auto brake pad, this friction material is made up of following component with parts by weight: melamine modified phenolic resin 25 parts, methenamine 7 parts, alumina fibre 11 parts, potassium titanate crystal whisker 5 parts, attapulgite 3 parts, chromite powder 6 parts, calcium silicates ceramic powder 7 parts, 9 parts, barium sulfate, colloid molybdenum bisuphide 3 parts, 4 parts, talcum, flake graphite 9 parts; Described preparation method comprises the steps:
1) by above-mentioned weight proportion weighing, then attapulgite, chromite powder, calcium silicates ceramic powder, barium sulfate, talcum are put into batch mixer and mixed about 3 hours, then add colloid molybdenum bisuphide and mix about 1.5 hours again, then add flake graphite and mix about 1.5 hours again, prepare powder compound for subsequent use;
2) by melamine modified phenolic resin, methenamine, alumina fibre and potassium titanate crystal whisker mix and blend about 1.5 hours, then step 1 is added) compound prepared, then stir about 3 hours, obtain friction material compound;
3) by step 2) the friction material compound that obtains is pressed into base substrate, then about 185 DEG C, mold pressing 15 minutes under the pressure of 20MPa, then heat treatment 12 hours at 200 DEG C.
The constant speed experimental result of the friction material of embodiment one to three is as follows:
The constant speed experimental result of the friction material of table 1 embodiment one to three
Applicant states, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, namely do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of auxiliary element, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.
Claims (3)
1. the preparation method of a Friction material for auto brake pad, it is characterized in that, this friction material is made up of following component with parts by weight: thermosetting resin 23-27 part, resin curing agent 6-8 part, alumina fibre 10-12 part, potassium titanate crystal whisker 4-6 part, attapulgite 2-4 part, chromite powder 5-7 part, calcium silicates ceramic powder 6-8 part, barium sulfate 8-10 part, colloid molybdenum bisuphide 2-4 part, talcum 3-5 part, flake graphite 8-10 part; Alumina fibre, potassium titanate crystal whisker, attapulgite, chromite powder and calcium silicates ceramic powder can play coordinative role at friction material duration of work; Described preparation method comprises the steps:
1) by above-mentioned weight proportion weighing, then attapulgite, chromite powder, calcium silicates ceramic powder, barium sulfate, talcum are put into batch mixer and mixed about 2-4 hour, then add colloid molybdenum bisuphide and mix about 1-2 hour again, then add flake graphite and mix about 1-2 hour again, prepare powder compound for subsequent use;
2) thermosetting resin, resin curing agent, alumina fibre and potassium titanate crystal whisker mix and blend are about 1-3 hour, then add step 1) compound prepared, then stir about 2-4 hour, obtain friction material compound;
3) by step 2) the friction material compound that obtains is pressed into base substrate, then at about 180-190 DEG C, mold pressing 13-17 minute under the pressure of 15-25MPa, then at 195-205 DEG C heat treatment 10-14 hour.
2. the preparation method of Friction material for auto brake pad according to claim 1, it is characterized in that, said thermosetting resin can be one or more in phenolic resins, boron modified phenolic resin, melamine modified phenolic resin and aralkyl modified phenolic resins.
3. the preparation method of Friction material for auto brake pad according to claim 1, is characterized in that, said resin curing agent can be one or more in hexamethylenetetramine, sulphur and methenamine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210305714.4A CN102794912B (en) | 2012-08-24 | 2012-08-24 | Preparation method of friction material for vehicle brake disc |
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| CN201210305714.4A CN102794912B (en) | 2012-08-24 | 2012-08-24 | Preparation method of friction material for vehicle brake disc |
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| CN102794912A CN102794912A (en) | 2012-11-28 |
| CN102794912B true CN102794912B (en) | 2015-03-11 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6211282B2 (en) | 2013-03-27 | 2017-10-11 | 大塚化学株式会社 | Resin composition, friction material, and production method thereof |
| CN104943183B (en) * | 2015-04-30 | 2018-01-05 | 张春文 | A kind of cold pressing one-shot forming technique of disc brake pad |
| CN105152203B (en) * | 2015-08-24 | 2017-01-04 | 句容亿格纳米材料厂 | The preparation method of a kind of potassium titanate and the application in friction material thereof |
| CN105130484B (en) * | 2015-08-26 | 2017-11-28 | 贵州宏安制动器科技有限公司 | A kind of ceramic frication material method for mixing raw materials |
| CN105713569A (en) * | 2016-03-09 | 2016-06-29 | 苏州莱特复合材料有限公司 | Preparation method of fiber-doped resin based friction material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1814657A (en) * | 2005-02-02 | 2006-08-09 | 中南大学 | Environment-protection type high-performance automobile braking piece and making method |
| CN101759958A (en) * | 2009-12-21 | 2010-06-30 | 中国计量学院 | Enhanced ceramic friction material and preparation method thereof |
| JP2010144034A (en) * | 2008-12-18 | 2010-07-01 | Akebono Brake Ind Co Ltd | Thermosetting resin composition, method for producing the same, friction material binder, and friction material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009242656A (en) * | 2008-03-31 | 2009-10-22 | Ube Ind Ltd | Friction material and resin composition for friction material |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1814657A (en) * | 2005-02-02 | 2006-08-09 | 中南大学 | Environment-protection type high-performance automobile braking piece and making method |
| JP2010144034A (en) * | 2008-12-18 | 2010-07-01 | Akebono Brake Ind Co Ltd | Thermosetting resin composition, method for producing the same, friction material binder, and friction material |
| CN101759958A (en) * | 2009-12-21 | 2010-06-30 | 中国计量学院 | Enhanced ceramic friction material and preparation method thereof |
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Effective date of registration: 20150113 Address after: 415000, Linjiang Road, Linjiang Road, Changde 35, Wuling District, Hunan, Applicant after: Hunan Changde Jiada Friction Material Co., Ltd. Address before: Yinzhou District Lianfeng road 315175 Zhejiang city of Ningbo Province, No. 889 Applicant before: Dai Chufa |
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