CN111942331A - Friction material, friction body, cleaning tile comprising friction body, preparation method and application of cleaning tile - Google Patents
Friction material, friction body, cleaning tile comprising friction body, preparation method and application of cleaning tile Download PDFInfo
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- CN111942331A CN111942331A CN202010791584.4A CN202010791584A CN111942331A CN 111942331 A CN111942331 A CN 111942331A CN 202010791584 A CN202010791584 A CN 202010791584A CN 111942331 A CN111942331 A CN 111942331A
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- metal
- phenolic resin
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- modified phenolic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/62—Other vehicle fittings for cleaning
- B60S1/66—Other vehicle fittings for cleaning for cleaning vehicle exterior
- B60S1/68—Other vehicle fittings for cleaning for cleaning vehicle exterior for freeing wheels or tyres from foreign matter, e.g. wheel scrapers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
- C09K3/149—Antislip compositions
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to the technical field of friction materials, in particular to a friction material, a friction body, a cleaning tile comprising the friction body, a preparation method of the cleaning tile and application of the cleaning tile. The friction material provided by the invention comprises the following raw materials in parts by weight: 10-14 parts of adhesive, 19-24 parts of metal fiber, 8-11 parts of nonmetal fiber, 45-50 parts of tackifier, 4-10 parts of elastic particles and 4-7 parts of lubricant. The friction material provided by the invention is applied to the cleaning tile, so that the defect of the wheel tread can be effectively eliminated, the tread roughness is increased, the adhesion coefficient between the wheel tread and the steel rail is further improved, and the phenomena of idle running and slipping of the wheel in the running process of a train are prevented.
Description
Technical Field
The invention relates to the technical field of friction materials, in particular to a friction material, a friction body, a cleaning tile comprising the friction body, a preparation method of the cleaning tile and application of the cleaning tile.
Background
The braking system of railway rolling stock and urban rail transit vehicle generally uses tread braking mode (brake shoe braking) to brake train, and adopts cast iron brake shoe and composite brake shoe to hold wheel tread tightly, and utilizes friction to make wheel stop rotating so as to implement parking brake. The braking mode has small friction area, increases the braking heat load of the tread along with the increase of the speed of the train, and easily causes the defects of abnormal abrasion, cracks, peeling and the like of the tread of the wheel.
With the increase of the running speed of the train, the tread brake is difficult to meet the brake of the high-speed train, so that the disc brake with large friction area and high brake efficiency is developed. The disc brake can greatly reduce the thermal load and mechanical abrasion of the wheel tread, and has stable braking and low noise. However, the disc brake has disadvantages that the tread of the disc brake wheel is lack of the friction of brake shoes, and the wheel-rail adhesion is deteriorated, which is not beneficial to the wheel-rail adhesion. For the rail transit train with the wheel-rail contact as the main mode, the contact state between the wheel and the rail has important influence on traction and braking. The railway train mainly utilizes the adhesion coefficient between the wheel rails to play a role in braking and traction, when the speed of the railway train is low, the adhesion coefficient between the wheel rails can meet the braking and traction requirements of the train, but along with the speed increase of railway passenger transportation and the heavy load of freight transportation, the adhesion coefficient has more and more obvious importance on the traffic safety especially for the train with the speed per hour of more than 120 kilometers.
The existing tread cleaning tile is mainly composed of a steel back and a friction body, and is used for grinding and cleaning the tread of a train wheel, so that on one hand, impurities such as stains, grease, rust stains and the like attached to the tread of the wheel can be removed, on the other hand, the tread of the wheel can be repaired by using the tread cleaning tile, the defect of the tread of the wheel is eliminated, the tread state of the wheel is improved and the adhesion force between wheel rails is enhanced by grinding and scraping the tread of the wheel. However, the existing tread cleaning tile material, especially the friction body material, can not effectively eliminate the defect of the tread of the wheel when in contact with the tread of the wheel, the tread state of the wheel is improved, the adhesion coefficient between the tread of the wheel and the steel rail is further low, and the wheel is easy to idle and slip in the running process of a train.
Disclosure of Invention
The invention aims to overcome the defects that the prior tread cleaning tile material, particularly the friction body material, can not effectively eliminate the tread defect of a wheel when in action contact with the tread of the wheel, improve the tread state of the wheel, further cause the low adhesion coefficient between the tread of the wheel and a steel rail and easily cause the idle running and the slipping of the wheel in the running process of a train, and further provides a friction material, a friction body, a cleaning tile comprising the friction body and a preparation method and application of the cleaning tile.
In order to achieve the purpose, the invention adopts the following technical scheme:
a friction material comprises the following raw materials in parts by weight:
10-14 parts of adhesive, 19-24 parts of metal fiber, 8-11 parts of nonmetal fiber, 45-50 parts of tackifier, 4-10 parts of elastic particles and 4-7 parts of lubricant.
Preferably, the adhesion promoter is selected from one or more of metal oxides, metal powders and non-metal oxides.
Preferably, the binder consists of butyronitrile modified phenolic resin, boron modified phenolic resin and cashew nut shell oil modified phenolic resin.
Preferably, the mass ratio of the butyronitrile modified phenolic resin to the boron modified phenolic resin to the cashew nut shell oil modified phenolic resin is (2-5) to (1-3) to 2.
Preferably, the metal fibers consist of steel fibers and brass fibers, and the mass ratio of the steel fibers to the brass fibers is 1 (0.8-1.2);
the non-metallic fibers comprise inorganic fibers and organic fibers; the nonmetal fibers consist of aramid fibers and mineral fibers, and the mass ratio of the aramid fibers to the mineral fibers is (1-3): 4;
the tackifier consists of metal oxide, metal powder and non-metal oxide, and the mass ratio of the metal oxide to the metal powder to the non-metal oxide is (2-5): (6-8) 4;
the lubricant consists of graphite and petroleum coke, and the mass ratio of the graphite to the petroleum coke is (0.8-1.2): 1.
Preferably, the cashew nut shell oil modified phenolic resin is liquid cashew nut shell oil modified phenolic resin;
the metal oxide is selected from one or more of magnesium oxide, calcium oxide, iron oxide and aluminum oxide;
the metal powder is metal simple substance powder and/or alloy powder; the metal powder is selected from one or more of iron powder, magnesium powder, aluminum powder and ferrochrome powder;
the non-metal oxide is silicon oxide;
the graphite is flake graphite.
The elastic particles of the present invention are those known in the art, and can be prepared by known methods or commercially available. Optionally, the elastic particles are organic elastic particles, and optionally, the elastic particles may be styrene butadiene rubber or polyurethane elastomer.
The invention also provides a friction body which is made of the friction material.
The invention also provides a cleaning tile which comprises a steel backing and the friction body.
The invention also provides a preparation method of the cleaning tile, which comprises the following steps:
1) mixing and banburying the raw materials to obtain a banburying mixture;
2) granulating the banburying mixture to obtain mixture particles;
3) pressing the mixture particles and the steel backing to obtain a rough blank of the cleaning tile;
4) and curing the rough blank of the cleaning tile to obtain the cleaning tile.
Preferably, the banburying temperature is 65-75 ℃, and the banburying time is 5-12 min;
the particle size of the mixture particles is 2-5 mm;
the pressing temperature is 20-30 ℃, the pressing pressure is 25-35MPa, and the pressing time is 20-60 s;
the curing temperature is 180 ℃ and 210 ℃, and the curing time is 6-10 h.
The cleaning tile comprises a steel back and a friction body, wherein the steel back and the friction body are connected together through the method in a mold forming mode. Optionally, the steel backing is made of a T12 steel plate meeting the GB/T1298 requirements by sheet metal forming. Optionally, the size of the cleaning tile interface meets the size requirement of the corresponding interface of the cleaner, the cleaning tile friction surface is matched with the wheel tread, and four edges of the friction surface adopt chamfer or fillet design, so that the cleaning tile friction surface is well attached to the wheel tread, and meanwhile, the chamfer or fillet design of the four edges avoids the appearance of block falling caused by abnormal stress of the cleaning tile.
The invention also provides the cleaning tile or the application of the cleaning tile prepared by the preparation method of the cleaning tile in rail transit trains.
The invention has the beneficial effects that:
1) the friction material provided by the invention comprises the following raw materials in parts by weight: 10-14 parts of adhesive, 19-24 parts of metal fiber, 8-11 parts of nonmetal fiber, 45-50 parts of tackifier, 4-10 parts of elastic particles and 4-7 parts of lubricant. According to the invention, the tackifier with the specific content is matched with the adhesive, the metal fiber, the nonmetal fiber, the elastic particles and the lubricant, so that the prepared friction body can effectively eliminate the defect of the wheel tread when in friction contact with the wheel tread, increase the roughness of the wheel tread, further improve the adhesion coefficient between the wheel tread and the steel rail, and prevent the wheel from idling and slipping in the running process of a train.
2) The friction material provided by the invention further comprises a tackifier, wherein the tackifier consists of metal oxide, metal powder and non-metal oxide; the mass ratio of the metal oxide to the metal powder to the nonmetal oxide is (2-5): (6-8) 4; the binder consists of butyronitrile modified phenolic resin, boron modified phenolic resin and cashew nut shell oil modified phenolic resin; the mass ratio of the butyronitrile modified phenolic resin to the boron modified phenolic resin to the cashew nut shell oil modified phenolic resin is (2-5) to (1-3) to 2. The adhesion coefficient between the wheel tread and the steel rail can be improved on the basis of ensuring the basic performance of the friction body by the interaction of the tackifier and the adhesive in a specific ratio.
3) The friction material provided by the invention is further characterized in that the metal oxide is selected from one or more of magnesium oxide, calcium oxide, iron oxide and aluminum oxide; the metal powder is metal simple substance powder and/or alloy powder; the metal powder is selected from one or more of iron powder, magnesium powder, aluminum powder and ferrochrome powder; the non-metal oxide is silicon oxide; the invention can further improve the adhesion coefficient between the wheel tread and the steel rail by matching the specific components with the specific adhesive and other components and applying the components to the cleaning tile.
4) The invention also provides a cleaning tile which comprises a steel backing and the friction body. The cleaning tile is applied to a medium-high speed (more than or equal to 100km/h) disc brake train, so that the cleaning of the wheel tread of the rail transit vehicle can be realized, the stain on the wheel tread is removed, the defect of the wheel tread is eliminated, the wheel tread state and the adhesion coefficient between steel rails are improved, the adhesion force between the wheel rails of the train is enhanced, the train is ensured to have enough adhesion coefficient, the idling and the slipping in the running process of the train are prevented, and the guarantee is provided for the high-speed rail transit.
5) The invention also provides a preparation method of the cleaning tile, and the method adopts a cold pressing mode to prepare the cleaning tile, so that the production efficiency of the cleaning tile can be improved, and the supply period of products can be shortened.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
The butyronitrile modified phenolic resin used in the following examples and comparative examples of the present invention is available from Shanghai Rodi New Material science and technology Co., Ltd, model No. PR 55291; the boron modified phenolic resin is purchased from Zhengzhou city double pigeon resin Co., Ltd, and has the model of PF 2123; the liquid cashew nut shell oil modified phenolic resin is purchased from Kadelia corporation, and has the model number of NX-5341; the elastic particles are purchased from Shizhuang Shuo Mao Friction Material science and technology Co., Ltd, and have a model number of KL-1.
Example 1
The embodiment provides a friction material, which comprises the following raw materials: 12g of binder, 20g of metal fiber, 10g of nonmetal fiber, 48g of tackifier, 6g of elastic particle and 6g of lubricant; the binder consists of butyronitrile modified phenolic resin, boron modified phenolic resin and liquid cashew shell oil modified phenolic resin, and the mass ratio of the butyronitrile modified phenolic resin to the boron modified phenolic resin to the liquid cashew shell oil modified phenolic resin is 3:2: 2; the metal fiber consists of steel fiber and brass fiber, and the mass ratio of the steel fiber to the brass fiber is 1: 1; the nonmetal fibers are composed of aramid fibers and mineral fibers, and the mass ratio of the aramid fibers to the mineral fibers is 1: 2; the tackifier consists of aluminum oxide, ferrochrome powder and silicon oxide, wherein the mass ratio of the aluminum oxide to the ferrochrome powder to the silicon oxide is 3: 7: 4; the lubricant consists of crystalline flake graphite and petroleum coke, and the mass ratio of the crystalline flake graphite to the petroleum coke is 1: 1;
the method for preparing the cleaning tile by adopting the friction material comprises the following steps:
1) respectively weighing the raw materials, and then sequentially putting the binder, the metal fiber, the nonmetal fiber, the tackifier, the elastic particles and the lubricant into an internal mixer for mixing and banburying to obtain a banburying mixture; the banburying temperature is 70 ℃, and the banburying time is 10 min;
2) putting the banburying mixture into a granulator for granulation to obtain mixture particles; the particle size of the mixture particles is 3 mm;
3) placing the mixture particles and the steel backing in a press die for pressing so as to form a friction body on the steel backing, and obtaining a rough blank of the cleaning tile; the pressing temperature is 25 ℃, the pressing pressure is 30MPa, and the pressing time is 30 s;
4) and curing the cleaning tile rough blank at 200 ℃ for 8 hours to obtain the cleaning tile.
Example 2
The embodiment provides a friction material, which comprises the following raw materials: 10g of binder, 24g of metal fiber, 8g of nonmetal fiber, 50g of tackifier, 4g of elastic particle and 7g of lubricant; the binder consists of butyronitrile modified phenolic resin, boron modified phenolic resin and liquid cashew shell oil modified phenolic resin, and the mass ratio of the butyronitrile modified phenolic resin to the boron modified phenolic resin to the liquid cashew shell oil modified phenolic resin is 2:1: 2; the metal fiber consists of steel fiber and brass fiber, and the mass ratio of the steel fiber to the brass fiber is 1: 0.8; the nonmetal fibers are composed of aramid fibers and mineral fibers, and the mass ratio of the aramid fibers to the mineral fibers is 1: 4; the tackifier consists of aluminum oxide, ferrochrome powder and silicon oxide, wherein the mass ratio of the aluminum oxide to the ferrochrome powder to the silicon oxide is 1: 3: 2; the lubricant consists of crystalline flake graphite and petroleum coke, and the mass ratio of the crystalline flake graphite to the petroleum coke is 0.8: 1;
the method for preparing the cleaning tile by adopting the friction material comprises the following steps:
1) respectively weighing the raw materials, and then sequentially putting the binder, the metal fiber, the nonmetal fiber, the tackifier, the elastic particles and the lubricant into an internal mixer for mixing and banburying to obtain a banburying mixture; the banburying temperature is 65 ℃, and the banburying time is 12 min;
2) putting the banburying mixture into a granulator for granulation to obtain mixture particles; the particle size of the mixture particles is 2 mm;
3) placing the mixture particles and the steel backing in a press die for pressing so as to form a friction body on the steel backing, and obtaining a rough blank of the cleaning tile; the pressing temperature is 20 ℃, the pressing pressure is 25MPa, and the pressing time is 60 s;
4) and curing the cleaning tile rough blank at 180 ℃ for 10 hours to obtain the cleaning tile.
Example 3
The embodiment provides a friction material, which comprises the following raw materials: 14g of binder, 19g of metal fiber, 11g of nonmetal fiber, 45g of tackifier, 10g of elastic particle and 4g of lubricant; the binder consists of butyronitrile modified phenolic resin, boron modified phenolic resin and liquid cashew shell oil modified phenolic resin, and the mass ratio of the butyronitrile modified phenolic resin to the boron modified phenolic resin to the liquid cashew shell oil modified phenolic resin is 5:3: 2; the metal fiber consists of steel fiber and brass fiber, and the mass ratio of the steel fiber to the brass fiber is 1: 1.2; the nonmetal fibers are composed of aramid fibers and mineral fibers, and the mass ratio of the aramid fibers to the mineral fibers is 3: 4; the tackifier consists of iron oxide, aluminum powder and silicon oxide, wherein the mass ratio of the iron oxide to the aluminum powder to the silicon oxide is 5: 8: 4; the lubricant consists of crystalline flake graphite and petroleum coke, and the mass ratio of the crystalline flake graphite to the petroleum coke is 1.2: 1;
the method for preparing the cleaning tile by adopting the friction material comprises the following steps:
1) respectively weighing the raw materials, and then sequentially putting the binder, the metal fiber, the nonmetal fiber, the tackifier, the elastic particles and the lubricant into an internal mixer for mixing and banburying to obtain a banburying mixture; the banburying temperature is 75 ℃, and the banburying time is 5 min;
2) putting the banburying mixture into a granulator for granulation to obtain mixture particles; the particle size of the mixture particles is 5 mm;
3) placing the mixture particles and the steel backing in a press die for pressing so as to form a friction body on the steel backing, and obtaining a rough blank of the cleaning tile; the pressing temperature is 30 ℃, the pressing pressure is 35MPa, and the pressing time is 20 s;
4) and curing the cleaning tile rough blank at 210 ℃ for 6 hours to obtain the cleaning tile.
Example 4
The embodiment provides a friction material, which comprises the following raw materials: 13g of binder, 21g of metal fiber, 10g of nonmetal fiber, 47g of tackifier, 6g of elastic particle and 6g of lubricant; the binder consists of butyronitrile modified phenolic resin, boron modified phenolic resin and liquid cashew shell oil modified phenolic resin, and the mass ratio of the butyronitrile modified phenolic resin to the boron modified phenolic resin to the liquid cashew shell oil modified phenolic resin is 4:3: 2; the metal fiber consists of steel fiber and brass fiber, and the mass ratio of the steel fiber to the brass fiber is 1: 1.1; the nonmetal fibers are composed of aramid fibers and mineral fibers, and the mass ratio of the aramid fibers to the mineral fibers is 2.5: 4; the tackifier consists of aluminum oxide, ferrochrome powder and silicon oxide, wherein the mass ratio of the aluminum oxide to the ferrochrome powder to the silicon oxide is (4): 7: 4; the lubricant consists of crystalline flake graphite and petroleum coke, and the mass ratio of the crystalline flake graphite to the petroleum coke is 0.9: 1;
the method for preparing the cleaning tile by adopting the friction material comprises the following steps:
1) respectively weighing the raw materials, and then sequentially putting the binder, the metal fiber, the nonmetal fiber, the tackifier, the elastic particles and the lubricant into an internal mixer for mixing and banburying to obtain a banburying mixture; the banburying temperature is 66 ℃, and the banburying time is 11 min;
2) putting the banburying mixture into a granulator for granulation to obtain mixture particles; the particle size of the mixture particles is 3 mm;
3) placing the mixture particles and the steel backing in a press die for pressing so as to form a friction body on the steel backing, and obtaining a rough blank of the cleaning tile; the pressing temperature is 25 ℃, the pressing pressure is 29MPa, and the pressing time is 44 s;
4) curing the cleaning tile rough blank at 190 ℃ for 7 hours to obtain the cleaning tile.
Example 5
This example provides a friction material and method of making a sweeping shoe using the friction material that differs from example 1 only in that the adhesion promoter is silica.
Example 6
This example provides a friction material and a method for manufacturing a sweeping shoe using the friction material, which differs from example 1 only in that the adhesion promoter is composed of alumina and ferrochrome powder, and the mass ratio of the alumina to the ferrochrome powder is 3: 11.
comparative example 1
This comparative example provides a friction material and a method of manufacturing a sweeping shoe using the friction material, which differs from example 1 only in that the friction material does not contain a tackifier.
Performance testing
Test example 1
The method comprises the steps of measuring an adhesion coefficient (namely the adhesion coefficient of a wheel rail before cleaning) between a wheel tread (made of ER8 steel) and a steel rail (made of high manganese steel) by using a wheel rail adhesion simulation testing machine, cleaning the wheel tread by using the cleaning tile prepared in the embodiment 1 of the invention for 10 times, measuring the adhesion coefficient (namely the adhesion coefficient of a wheel rail after cleaning) between the wheel tread and the steel rail by using the wheel rail adhesion simulation testing machine after cleaning, and calculating the improvement rate of the wheel rail adhesion coefficient.
The effect of the cleaning tiles prepared in inventive examples 2-6 and comparative example 1 on the adhesion coefficient of the wheel rail was tested according to the test method of example 1 above.
The increase rate of the wheel-rail adhesion coefficient/% (adhesion coefficient of the wheel rail after cleaning-adhesion coefficient of the wheel rail before cleaning)/adhesion coefficient of the wheel rail before cleaning%
The results are shown in Table 1.
TABLE 1 wheel-track adhesion coefficient test
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. The friction material is characterized by comprising the following raw materials in parts by weight:
10-14 parts of adhesive, 19-24 parts of metal fiber, 8-11 parts of nonmetal fiber, 45-50 parts of tackifier, 4-10 parts of elastic particles and 4-7 parts of lubricant.
2. The friction material of claim 1 wherein said adhesion promoter is selected from one or more of the group consisting of metal oxides, metal powders, and non-metal oxides.
3. The friction material of claim 1 or 2 wherein said adhesion promoter is comprised of metal oxides, metal powders and non-metal oxides; the mass ratio of the metal oxide to the metal powder to the nonmetal oxide is (2-5): (6-8) 4;
the binder consists of butyronitrile modified phenolic resin, boron modified phenolic resin and cashew nut shell oil modified phenolic resin; the mass ratio of the butyronitrile modified phenolic resin to the boron modified phenolic resin to the cashew nut shell oil modified phenolic resin is (2-5) to (1-3) to 2.
4. The friction material according to any of claims 1 to 3, wherein the metal fibers consist of steel fibers and brass fibers in a mass ratio of 1 (0.8-1.2);
the non-metallic fibers comprise inorganic fibers and organic fibers; the nonmetal fibers consist of aramid fibers and mineral fibers, and the mass ratio of the aramid fibers to the mineral fibers is (1-3): 4;
the lubricant consists of graphite and petroleum coke, and the mass ratio of the graphite to the petroleum coke is (0.8-1.2): 1.
5. The friction material of any of claims 1-4, wherein the cashew nut shell oil-modified phenolic resin is a liquid cashew nut shell oil-modified phenolic resin;
the metal oxide is selected from one or more of magnesium oxide, calcium oxide, iron oxide and aluminum oxide;
the metal powder is metal simple substance powder and/or alloy powder; the metal powder is selected from one or more of iron powder, magnesium powder, aluminum powder and ferrochrome powder;
the non-metal oxide is silicon oxide;
the graphite is flake graphite.
6. A friction body, characterized in that it is made of a friction material according to any one of claims 1 to 5.
7. A cleaning shoe, characterized in that it comprises a steel backing and a friction body according to claim 6.
8. A method of making the sweeping shoe of claim 7, comprising the steps of:
1) mixing and banburying the raw materials to obtain a banburying mixture;
2) granulating the banburying mixture to obtain mixture particles;
3) pressing the mixture particles and the steel backing to obtain a rough blank of the cleaning tile;
4) and curing the rough blank of the cleaning tile to obtain the cleaning tile.
9. The method for preparing the cleaning tile according to the claim 8, characterized in that the banburying temperature is 65-75 ℃, and the banburying time is 5-12 min;
the particle size of the mixture particles is 2-5 mm;
the pressing temperature is 20-30 ℃, the pressing pressure is 25-35MPa, and the pressing time is 20-60 s;
the curing temperature is 180 ℃ and 210 ℃, and the curing time is 6-10 h.
10. Use of a sweeping tile according to claim 7 or a sweeping tile prepared by the method of preparation according to claim 8 or 9 in rail transit trains.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010791584.4A CN111942331B (en) | 2020-08-07 | 2020-08-07 | Friction material, friction body, cleaning tile and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010791584.4A CN111942331B (en) | 2020-08-07 | 2020-08-07 | Friction material, friction body, cleaning tile and preparation method and application thereof |
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| CN111942331B CN111942331B (en) | 2021-12-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110628216A (en) * | 2019-08-13 | 2019-12-31 | 北京天仁道和新材料有限公司 | Friction material, friction lining and preparation method thereof |
| CN110878802A (en) * | 2019-10-25 | 2020-03-13 | 山东金麒麟股份有限公司 | Low-creep noise friction material, brake pad and preparation method thereof |
| CN111231434A (en) * | 2020-02-26 | 2020-06-05 | 杭州萧山红旗摩擦材料有限公司 | High-performance composite friction material and preparation method thereof |
| CN111396482A (en) * | 2020-02-21 | 2020-07-10 | 泰明顿摩擦材料技术(上海)有限公司 | Copper-free friction material and brake pad |
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2020
- 2020-08-07 CN CN202010791584.4A patent/CN111942331B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110628216A (en) * | 2019-08-13 | 2019-12-31 | 北京天仁道和新材料有限公司 | Friction material, friction lining and preparation method thereof |
| CN110878802A (en) * | 2019-10-25 | 2020-03-13 | 山东金麒麟股份有限公司 | Low-creep noise friction material, brake pad and preparation method thereof |
| CN111396482A (en) * | 2020-02-21 | 2020-07-10 | 泰明顿摩擦材料技术(上海)有限公司 | Copper-free friction material and brake pad |
| CN111231434A (en) * | 2020-02-26 | 2020-06-05 | 杭州萧山红旗摩擦材料有限公司 | High-performance composite friction material and preparation method thereof |
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