CN1058776C - Asbestos-free friction material and producing method thereof - Google Patents
Asbestos-free friction material and producing method thereof Download PDFInfo
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- CN1058776C CN1058776C CN97112643A CN97112643A CN1058776C CN 1058776 C CN1058776 C CN 1058776C CN 97112643 A CN97112643 A CN 97112643A CN 97112643 A CN97112643 A CN 97112643A CN 1058776 C CN1058776 C CN 1058776C
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Abstract
The present invention relates to an asbestos-free friction material and a producing method thereof, which is characterized in that hair and steel fibers are used as reinforcing materials, the ratio of the hair to the steel fibers is 1/1 to 10/1 and which occupies 2 to 20% of proportioning contents, and butadiene-acrylonitrile rubber is not used. The cost of raw materials and the production technology of the asbestos-free friction material is low, so the cost of products is largely lower than that of the existing asbestos-free friction material; the present invention has the advantages of good friction, high wear resistance, heat fading stability, and high safety and reliability. The present invention is especially suitable for automobile brake blocks, and especially for friction wafers of drum brakes.
Description
What the present invention relates to is the brake strip made technology of motor vehicle and mechanical braking control, particularly in, heavy-duty car drum type brake friction liner material manufacturing technology.
In traditional friction material manufacturing technology, asbestos are to be used to one of main raw material(s) of making automobile brake friction liner and other mechanical braking friction facing, and its content can reach about 50%.But asbestos have been carcinogens by generally acknowledging, and asbestos dust not only causes severe contamination to environment, and very big to human health damage.In addition, asbestos friction material also has hardness height, thermal expansion, heat fade problem on performance.Therefore, people have begun to develop asbestos-free friction material, as the alternative of asbestos friction material.See that from present circumstances mainly containing the semimetal system is the friction material of reinforcing material with the alternative asbestos of steel fiber promptly, friction material as No. 2100275 patent disclosures of the Britain in 82 years is with steel fiber---raw materials such as Steel Fibre, carbon fiber replace asbestos, the friction material of CN88105160 patent disclosure is to substitute asbestos with Steel Fibre, it contains content of steel fiber at 5-50%, and the friction material of CN93115918 patent disclosure is to substitute asbestos with Steel Fibre and brucite fiber.Though the frictional behaviour of semimetal system friction material is better, steel fiber costs an arm and a leg, so raw material and cost of production are very high, and than great, hardness is also higher, has problems such as damaging mating material easily during use.At present the another kind of asbestos-free friction material of research and development is to be that reinforcing material substitutes asbestos with glass fibre and other organic or inorganic fiber blends, is to substitute asbestos with short glass fiber 10-25% and poly-propionitrile fiber 10-25% as the friction material of CN90109428 patent disclosure.Not only to the worker of direct contact is healthy certain harmfulness arranged in process of production as the glass fibre of main reinforcing material, its product frictional behaviour is also undesirable, its wear rate is the several times of asbestos material normally, particularly its wear rate is bigger when 300 ℃ of high temperature, material wear ability is poor, friction element is just short working life, and safety reliability descends, and heat fade simultaneously and hot restorability are all undesirable.Though with glass fibre and other organic or inorganic fiber blends is that reinforcing material substitutes asbestos, the reinforcing material cost is low than Steel Fibre, but its prescription all is as tackiness agent with nitrile butadiene rubber and modified phenolic resin resin blends, nitrile butadiene rubber and phenol-formaldehyde resin modified material blend producing process are complicated, and the price of nitrile butadiene rubber is also very expensive, equally also improve cost of production, made the cost of asbestos-free friction material be higher than about one to two times of asbestos friction material.The friction material of CN93102131 patent disclosure is to substitute asbestos with glass fibre 16% and Kafra fiber 4%, though it has improved the wear resistance of material, frictional behaviour is also better, but is to use nitrile butadiene rubber and modified phenolic resin resin blends as tackiness agent too, and product cost is higher too.
The purpose of this invention is to provide a kind of do not have asbestos, glass fibre, nitrile butadiene rubber and frictional behaviour good drag friction sheet material and production method, to solve above-mentioned prior art problem, particularly cost problem of higher.
Friction material of the present invention includes phenol-formaldehyde resin modified, metal powder, magnesium oxide, zine oxide, blanc fixe, wollastonite, graphite, potter's clay, junked tire powder, lamination coating and constitutes, lamination coating is hair and Steel Fibre, and metal powder is one of former iron powder, aluminium powder, copper powder or its mixture.
The present invention realizes by following raw material proportioning and production technology:
One, forms proportioning (weight percentage); Phenol-formaldehyde resin modified 15-30%, metal powder 10-40%, Steel Fibre 1-5%, blanc fixe 3-25%, wollastonite 3-30%, junked tire powder 2-10%, hair 1-15%, graphite 1-10%, zine oxide 1-15%, magnesium oxide 1-15%, potter's clay 3-30%, hair is 1-10 with the Steel Fibre ratio: 1.
Two, manufacturing technique method;
1, weighing batch mixing: above-mentioned raw materials by after the proportioning weighing, is added batch mixer and stirs;
2, preheating: above-mentioned all mixed material is placed in the baking oven, and preheating is 30 minutes under 110-130 ℃ temperature;
3, hot-forming: with the temperature and pressure 250kg/cm of the material after the above-mentioned preheating (pressing the required weighing of goods specification) usefulness mould at 165-170 ℃
2Down hot-forming, the thickness of hot-forming time root a tree name goods friction plate and determining is generally at 5-20 minute;
4, vulcanizing treatment: said products is carried out vulcanizing treatment, 170 ± 3 ℃ of sulfurize temperatures, cure time 1.5-2 hour (thickness according to sheet is decided);
5, grind processing and make finished product.
The present invention is mainly with hair and to join a small amount of Steel Fibre be reinforcing material, (Steel Fibre is a reinforcing material, but the use of Steel Fibre is main in the present invention is to add in a small amount in order to increase hardness to use), at mechanical properties hair and Steel Fibre 1: 1-10: 1 mixes application demonstrates all tangible advantages.Because the present invention adopts hair to substitute asbestos, glass fibre, it has not only eradicated asbestos dust to the pollution of environment and to the harm of health, has also eliminated the influence that glass fibre endangers human body.Owing to adopt hair and hair to have the characteristics of tensile strength height, good toughness, the impact strength of friction material goods of the present invention is improved, good toughness, therefore product is not only applicable to the friction plate use of general vehicle, and can be applicable to that especially the drum-type friction facing of large and medium-sized automobile uses.Material prescription metal powder content of the present invention is higher, the multiple friction filler batching of collocation rationally, promptly guaranteed the hardness of material, fully improved the thermal conductivity of material again, the heat that friction plate is produced when braking can in time go to dispel the heat to the braking shoes by its internal delivery, reduces the temperature of friction lamellar body, and reduces thermal expansion, thereby solved problems such as thermal expansion in use, heat fade preferably, and stable friction performance.In addition, the present invention is because the hair and the junked tire powder of employing price cheapness are raw material, reduce and use content of steel fiber, do not use expensive nitrile butadiene rubber, also saved simultaneously the complex techniques process of nitrile butadiene rubber and resin alloy, thereby greatly reduce raw material and cost of production, simplified production technology, make the price of these friction material goods basic identical with the like product price that contains asbestos, frictional behaviour is better than and contains asbestos product, fundamentally solved the substitute products problem, made fully to substitute to contain asbestos product and become possibility.
Embodiment 1
Material is formed proportioning (weight percentage): phenol-formaldehyde resin modified 16%, metal powder 30%, Steel Fibre 2%, blanc fixe 10%, wollastonite 10%, junked tire powder 3%, hair 5%, graphite 2%, magnesium oxide 2%, zine oxide 2%, potter's clay 18%.Manufacturing technique method: above-mentioned raw materials is stirred with batch mixer after by the proportioning weighing, use baking oven preheating 30 minutes under 110-130 ℃ temperature then, the material after the preheating is pressed after the weighing of products made thereby specification with the temperature and pressure 250kg/cm of mould at 165-170 ℃
2Hot-forming down, the thickness of dwell time according to goods determines, generally at 5-20 minute, finish hot-forming back pressure release and take out, carry out vulcanizing treatment again, 170 ± 3 ℃ of sulfurize temperatures, cure time 1.5-2 hour, decide according to the thickness of goods, grind at last process finished product.
Embodiment 2
Material is formed proportioning (weight percentage): phenol-formaldehyde resin modified 25%, metal powder 20%, Steel Fibre 3%, blanc fixe 3%, wollastonite 15%, junked tire powder 5%, hair 11%, graphite 5%, magnesium oxide 5%, zine oxide 5%, potter's clay 3%.Manufacturing technique method is as described in the embodiment 1.
Embodiment 3
Material is formed proportioning (weight percentage): phenol-formaldehyde resin modified 20%, iron powder 25%, Steel Fibre 5%, blanc fixe 8%, wollastonite 5%, junked tire powder 8%, hair 8%, graphite 1%, magnesium oxide 7%, zine oxide 7%, potter's clay 6%.Manufacturing technique method is as described in the embodiment 1.
GB5763-86 presses in the national car mass of friction material Nikkei April 4 in 1997 of the present invention supervision and inspection center and the JF04-2A-1996 automobile detects with brake facing technical specifications ministry standard, every technical performance index all is up to state standards, and concrete data are referring to subordinate list 1
| Interventions Requested | Standard-required | Assay | Meet judgement | |
| Friction factor (μ) | 100℃ | 0.30-0.60 | 0.40 | Meet |
| 150℃ | 0.30-0.60 | 0.46 | ||
| 200℃ | 0.25-0.60 | 0.46 | ||
| 250℃ | 0.20-0.60 | 0.38 | ||
| 300℃ | 0.15-0.60 | 0.29 | ||
| 250℃ | 0.20-0.60 | 0.38 | ||
| 200℃ | 0.20-0.60 | 0.38 | ||
| 150℃ | 0.30-0.60 | 0.38 | ||
| 100℃ | 0.30-0.60 | 0.38 | ||
| Wear rate (10 -7cm 3N.m) | 100℃ | ≤0.51 | 0.33 | Meet |
| 150℃ | ≤0.77 | 0.25 | ||
| 200℃ | ≤1.02 | 0.24 | ||
| 250℃ | ≤2.04 | 0.43 | ||
| 300℃ | ≤3.57 | 0.46 | ||
| Impact strength (KJ m 2) | ≥4.5 | 4.7 | Meet | |
| Brinell hardness (Mpa) | 196-490 | 380 | Meet | |
| Interior shear strength (Mpa) | ≥11.3 | 13.0 | Meet | |
From last table test mass testing result, illustrate that asbestos-free friction material of the present invention has excellent friction, wear resistance, heat fade stability, make the particularly friction plate of drum brake of big-and-middle-sized automobile friction with it, braking is good, the safety reliability height, the little antithesis element that promptly do not damage of antithesis abrasion.Because its raw material and production technology cost are low, so the product cost price is significantly less than existing asbestos-free friction material.
Claims (5)
1, a kind of asbestos-free friction material is used for the friction material of motor vehicle brake device friction facing, and it is characterized in that: material mixture ratio consists of (weight percentage); Phenol-formaldehyde resin modified 15-30%, metal powder 10-40%, Steel Fibre 1-5%, blanc fixe 3-25%, wollastonite 3-30%, junked tire powder 2-10%, hair 1-15%, graphite 1-10%, zine oxide 1-15%, magnesium oxide 1-15%, potter's clay 3-30%, hair is 1-10 with the Steel Fibre ratio: 1.
2, friction material according to claim 1 is characterized in that: it is (weight percentage) that material is formed proportioning: phenol-formaldehyde resin modified 16%, metal powder 30%, Steel Fibre 2%, blanc fixe 10%, wollastonite 10%, junked tire powder 3%, hair 5%, graphite 2%, magnesium oxide 2%, zine oxide 2%, potter's clay 18%.
3, friction material according to claim 1 is characterized in that: it is (weight percentage) that material is formed proportioning: phenol-formaldehyde resin modified 25%, metal powder 20%, Steel Fibre 3%, blanc fixe 3%, wollastonite 15%, junked tire powder 5%, hair 11%, graphite 5%, magnesium oxide 5%, zine oxide 5%, potter's clay 3%.
4, friction material according to claim 1 is characterized in that: it is (weight percentage) that material is formed proportioning: phenol-formaldehyde resin modified 20%, iron powder 25%, Steel Fibre 5%, blanc fixe 8%, wollastonite 5%, junked tire powder 8%, hair 8%, graphite 1%, magnesium oxide 7%, zine oxide 7%, potter's clay 6%.
5, a kind of method of making the described friction material of claim 1, it is characterized in that the said ratio raw material is stirred with batch mixer after by the proportioning weighing, use baking oven preheating 30 minutes under 110-130 ℃ temperature then, the material after the preheating is pressed after the weighing of products made thereby specification with the temperature and pressure 250kg/cm of mould at 165-170 ℃
2Down hot-forming, the dwell time is 5-20 minute, finishes hot-forming back pressure release and takes out, and carries out vulcanizing treatment again, 170 ± 3 ℃ of sulfurize temperatures, cure time 1.5-2 hour, grind at last process finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97112643A CN1058776C (en) | 1997-06-20 | 1997-06-20 | Asbestos-free friction material and producing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97112643A CN1058776C (en) | 1997-06-20 | 1997-06-20 | Asbestos-free friction material and producing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1203326A CN1203326A (en) | 1998-12-30 |
| CN1058776C true CN1058776C (en) | 2000-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97112643A Expired - Fee Related CN1058776C (en) | 1997-06-20 | 1997-06-20 | Asbestos-free friction material and producing method thereof |
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| CN (1) | CN1058776C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100361797C (en) * | 2005-05-24 | 2008-01-16 | 东华大学 | Method for preparing brake sheets made from macromolecule alloy |
| CN100389274C (en) * | 2006-04-04 | 2008-05-21 | 王彦钧 | Preparation process for disk type brake lining and dedicated apparatus therefor |
| CN100384960C (en) * | 2006-05-22 | 2008-04-30 | 孙忠义 | Brake block friction material granulating manufacturing process |
| CN102221058A (en) * | 2010-04-19 | 2011-10-19 | 王子健 | Asbestos-free inorfil friction plate and manufacturing technology thereof |
| CN103644230A (en) * | 2013-11-15 | 2014-03-19 | 宁国飞鹰汽车零部件股份有限公司 | Non-asbestos brake block containing animal fibers and manufacturing method thereof |
| CN104675890A (en) * | 2013-11-28 | 2015-06-03 | 招远市东晟橡胶制品有限公司 | Rubber friction plate |
| CN107254295A (en) * | 2017-08-17 | 2017-10-17 | 苏州曼里尼斯金属科技有限公司 | One kind is without asbestos low metal automotive friction material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042763A (en) * | 1988-11-18 | 1990-06-06 | 沈阳市石棉制品研究所 | Manufacturing process of brake friction plate |
| CN1051781A (en) * | 1990-11-22 | 1991-05-29 | 华南理工大学 | A kind of manufacture method of asbestos-free friction material |
| CN1075782A (en) * | 1993-03-03 | 1993-09-01 | 周侃 | Do not contain the asbestos braking material |
| CN1093149A (en) * | 1993-11-17 | 1994-10-05 | 沈阳摩擦密封材料总厂 | friction plate |
| CN1152085A (en) * | 1995-12-12 | 1997-06-18 | 宋春燕 | Gasket for disc brake |
-
1997
- 1997-06-20 CN CN97112643A patent/CN1058776C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042763A (en) * | 1988-11-18 | 1990-06-06 | 沈阳市石棉制品研究所 | Manufacturing process of brake friction plate |
| CN1051781A (en) * | 1990-11-22 | 1991-05-29 | 华南理工大学 | A kind of manufacture method of asbestos-free friction material |
| CN1075782A (en) * | 1993-03-03 | 1993-09-01 | 周侃 | Do not contain the asbestos braking material |
| CN1093149A (en) * | 1993-11-17 | 1994-10-05 | 沈阳摩擦密封材料总厂 | friction plate |
| CN1152085A (en) * | 1995-12-12 | 1997-06-18 | 宋春燕 | Gasket for disc brake |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1203326A (en) | 1998-12-30 |
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