CN115678202A - Composite brake shoe and preparation method thereof - Google Patents
Composite brake shoe and preparation method thereof Download PDFInfo
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- CN115678202A CN115678202A CN202211705069.5A CN202211705069A CN115678202A CN 115678202 A CN115678202 A CN 115678202A CN 202211705069 A CN202211705069 A CN 202211705069A CN 115678202 A CN115678202 A CN 115678202A
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Abstract
The invention discloses a composite brake shoe and a preparation method thereof, wherein the composite brake shoe comprises a shoe back and a friction body, and the friction body comprises components such as nitrile rubber, powdery phenolic resin, nitrile rubber powder, brown corundum, crystalline flake graphite, barium sulfate, pottery clay, reduced iron, ferrous sulfide, calcined petroleum coke, diatomite, rock wool, hemp fiber, potassium titanate fiber, steel fiber, glass fiber and the like. The friction material is prepared by mixing and banburying the components and the like, and then the friction material and steel are back-pressed to synthesize the composite brake shoe. The composite brake shoe has the advantages of light weight, good friction, small abrasion and low noise in the braking process, and can effectively replace the cast iron brake shoe in the prior art.
Description
Technical Field
The invention belongs to the technical field of friction materials, and particularly relates to a composite brake shoe and a preparation method thereof.
Background
With the development of Chinese economy, the mainstream of economic development becomes to reduce energy consumption, reduce emission and improve safety, a brake shoe made of a composite material is often used at the beginning of the design of a newly-built vehicle at present, and the blending of brake parameters and the like is also matched with the performance of the brake shoe made of the composite material. However, china still has a huge number of diesel locomotives in foreign countries, the locomotives use cast iron brake shoes for braking, old locomotives cannot be replaced by new locomotives in a short time due to economic benefits and other reasons, and the problem of replacing the cast iron brake shoes with the synthetic material brake shoes is based on the consideration of factors such as not changing a braking system, ensuring driving safety, protecting environment, reducing the operation and maintenance cost of the old locomotives and the like.
The cast iron brake shoe has the following defects:
1. the brake shoe has high specific gravity, is not easy to carry or carry, and has high labor intensity for locomotive crew members to replace the brake shoe;
2. the abrasion is large, the service life is short (about 10 days of left stones), and the replacement needs to be repeated;
3. the damage to a basic brake device of the locomotive is large easily in the braking process;
4. the poor quality conditions such as expansion box, surface sand sticking, sand holes, air holes, shrinkage cavities and the like are easy to occur in the production process of the brake shoe;
5. the major source of noise in rail transport is the old freight cars and most freight trains are operated at night, producing noise levels averaging between 92 and 94 decibels 75mm away from the rail when the truck is operated at 80 km/h.
Therefore, a new composite brake shoe is needed, which can realize complete replacement without changing any parameters of the old locomotive, effectively improve the defects of large specific gravity, large abrasion, large harm, poor appearance quality, large noise and the like of the cast iron brake shoe, and effectively prolong the service life of the old locomotive.
Disclosure of Invention
The invention aims to provide a composite brake shoe and a preparation method thereof, which aim to solve the problems in the prior art.
The invention is realized by the following technical scheme: a composite brake shoe characterized by: the tile back comprises a tile back and a friction body, wherein the friction body comprises the following components in percentage by mass: 7-11% of nitrile rubber, 0.5-1% of rubber accelerator, 0.5-0.9% of rubber vulcanizing agent, 0.5-0.9% of anti-aging agent, 7-12% of powdery phenolic resin, 3-8% of nitrile rubber powder, 3-6% of brown corundum, 8-15% of flake graphite, 6-10% of barium sulfate, 1-5% of clay, 3-7% of reduced iron powder, 1-3% of ferrous sulfide, 3-6% of calcined petroleum coke, 1-5% of diatomite, 8-15% of rock wool, 7-12% of fibrilia, 5-10% of potassium titanate fiber, 3-8% of steel fiber and 2-5% of glass fiber.
The invention also discloses a preparation method of the composite brake shoe, which is characterized by comprising the following steps: firstly, preparing a friction body, comprising the following steps: s1, open-milling nitrile rubber in two stages, wherein the roll temperature of the first stage is 40-45 ℃, the roll distance is 2-3 mm, adding raw rubber and a rubber accelerator, and discharging and standing; the second stage of roller temperature is 50-70 ℃, the roller distance is 3-4 mm, rubber vulcanizing agent and cutting knife are added, the mixture is uniformly mixed, anti-aging agent is added, and the mixture is uniformly mixed in a cutting knife thin-pass mode after all the mixture is mixed;
s2, adding the obtained open rubber and the rest components of the friction body into an internal mixer, pressurizing the mixture under 5-7MPa, mixing the mixture for 25-30 minutes at the temperature of less than or equal to 150 ℃, pouring out the raw materials, cooling the raw materials to room temperature, and granulating the mixture to obtain a mixture for later use; wherein the particle size is 1-3 mm;
s3, putting the prepared mixture and the steel backing into a die for pressing, wherein the press force is 3000N/cm 2 Keeping the pressure at 170-180 ℃, and obtaining a molded semi-finished product according to the thickness of the product for 1 mm and 1 minute by molding time:
s4, performing thermal treatment on the prepared semi-finished product in an oven by adopting hot air circulation electric heating for 24 hours, wherein the first 16 hours are a heating stage until the highest thermal treatment temperature reaches 220 ℃, and then keeping the thermal treatment temperature at 220 ℃ for 8 hours to ensure that all raw materials are fully reacted and completely cooked, so as to obtain a friction body;
and finally, pressing the friction body and the shoe back to obtain the composite brake shoe.
Compared with the prior art, the invention has the advantages that:
1. the product of the scheme does not contain asbestos, lead and other substances which are possibly harmful to human health, and belongs to an environment-friendly product;
2. the friction performance can be adjusted according to the braking requirement of the locomotive. The friction performance of the composite brake shoe can be changed by changing and adjusting the formula and the process, the friction coefficient of the composite brake shoe is stable and the braking curve is more concentrated under the same working condition, so that the range of the designed braking friction coefficient of the original vehicle is more satisfied;
3. the brake shoe made of the composite material has the advantages of small specific gravity, weight of about 1/3 of that of the original matched brake shoe, easy carrying and transportation, more labor-saving brake shoe replacement and lower labor intensity, and simultaneously reduces the dead weight of the vehicle and the energy consumption of the locomotive;
4. the original cast iron brake shoe has poor wear resistance, the service life is prolonged by 5 to 6 times, and the replacement frequency is reduced;
5. the safety is good, no spark is generated during braking, and the synthetic brake shoe is used, so that the damage of worn iron powder and fire accidents caused by the fact that sparks are sprayed by braking can be effectively avoided. When the composite brake shoe is braked, no or little abrasion iron powder is scattered, so that fire accidents can be prevented, and the adverse effect on vehicles is reduced; the composite brake shoe has no groove in the use process, has very slight damage to the wheel and the steel rail, and prolongs the service life of the wheel and the steel rail;
6. if the composite brake shoe is used for matching with a surface polished wheel and a bogie with good damping performance, the brake is more comfortable and stable, the noise generated by freight transportation is reduced by about 20 percent, namely, the noise level is 25 percent of the current noise level, and the product has obvious effect of reducing the noise;
7. the friction body material of the invention adopts solid block-shaped glue and rubber powder which are blended for use, thereby ensuring the specific gravity of the bonding component and simultaneously considering the advantages of different performance raw materials. The solid block rubber has good wear resistance and elasticity, stronger rubber powder dispersibility and more stable performance due to blending use. The solid block rubber has high elasticity, good wear resistance, good cold resistance, high rubber powder strength, good dispersibility and stable molecular weight, and can well cure the brake shoe after vulcanization;
8. the friction body material uses the sub-state metal compound, the sub-state metal can generate oxidation-reduction reaction under different conditions, because the temperature rise is large when the original cast iron brake shoe vehicle brakes, and when the temperature is high, the reduction reaction is generated, the heat can be effectively absorbed, the further temperature rise is prevented, and the reduced component is also the common component of the brake shoe, the product performance can not be influenced; under the condition of proper ambient temperature, the fuel can be slowly oxidized, and the condition that the wheel is damaged due to overheating during braking is regulated.
Detailed Description
A composite brake shoe comprises a shoe back and a friction body, wherein the friction body comprises the following components in percentage by mass: 7-11% of nitrile rubber, 0.5-1% of rubber accelerator, 0.5-0.9% of rubber vulcanizing agent, 0.5-0.9% of anti-aging agent, 7-12% of powdery phenolic resin, 3-8% of nitrile rubber powder, 3-6% of brown corundum, 8-15% of flake graphite, 6-10% of barium sulfate, 1-5% of clay, 3-7% of reduced iron powder, 1-3% of ferrous sulfide, 3-6% of calcined petroleum coke, 1-5% of diatomite, 8-15% of rock wool, 7-12% of fibrilia, 5-10% of potassium titanate fiber, 3-8% of steel fiber and 2-5% of glass fiber.
The invention also discloses a preparation method of the composite brake shoe, which comprises the following steps: s1, open-milling nitrile rubber in two stages, wherein the roll temperature of the first stage is 40-45 ℃, the roll distance is 2-3 mm, adding raw rubber and a rubber accelerator, and discharging and standing; the second stage of roller temperature is 50-70 ℃, the roller distance is 3-4 mm, rubber vulcanizing agent and cutting knife are added, the mixture is uniformly mixed, anti-aging agent is added, and the mixture is uniformly mixed in a cutting knife thin-pass mode after all the mixture is mixed;
s2, adding the obtained mill batch and the rest components of the friction body into an internal mixer, pressurizing the mixture at 5-7MPa, mixing the mixture for 25-30 minutes at the temperature of less than or equal to 150 ℃, pouring out the raw materials, cooling the raw materials to room temperature, and then granulating the mixture to obtain a mixture for later use; wherein the particle size is 1-3 mm;
s3, putting the prepared mixture and the steel backing into a die for pressing, wherein the press force is 3000N/cm 2 Keeping the pressure at 170-180 ℃, and obtaining a molded semi-finished product according to the thickness of the product for 1 mm and 1 minute by molding time:
s4, performing thermal treatment on the prepared semi-finished product in an oven by adopting hot air circulation electric heating for 24 hours, wherein the first 16 hours are heating stages until the highest thermal treatment temperature reaches 220 ℃, and then keeping the thermal treatment temperature at 220 ℃ for 8 hours, so that all raw materials are fully reacted, and thorough ripening is ensured, thus obtaining a friction body;
and finally, pressing the friction body and the shoe back to obtain the composite brake shoe.
The invention is further illustrated by the following specific examples.
Example 1
The technical scheme adopted by the embodiment is that the composite brake shoe for the locomotive, which is made of a composite material instead of a cast iron material, comprises a friction body and a steel backing, wherein the friction body comprises the following components in percentage by mass: 8.5% of nitrile rubber, 0.8% of rubber accelerator, 0.6% of rubber vulcanizing agent, 0.6% of anti-aging agent, 9% of phenolic resin, 5% of nitrile rubber powder, 4% of brown corundum, 10% of crystalline flake graphite, 8% of barium sulfate, 3% of clay, 5% of reduced iron powder, 1.5% of ferrous sulfide, 4.5% of calcined petroleum coke, 3% of diatomite, 11% of rock wool, 9% of hemp fiber, 8% of potassium titanate fiber, 5% of steel fiber and 3.5% of glass fiber.
The preparation method of the composite brake shoe comprises the following steps:
nitrile rubber is milled in two sections, the first section of the mill rolls are at the temperature of 40-45 ℃ and the roll spacing is 2-3 mm, raw rubber and rubber accelerator are added firstly, and the nitrile rubber is taken out and is placed; the second stage of roller temperature is 50-70 ℃, the roller distance is 3-4 mm, rubber vulcanizing agent and cutting knife are added, the mixture is uniformly mixed, anti-aging agent is added, and the mixture is uniformly mixed in a cutting knife thin-pass mode after all the mixture is mixed;
1) Adding the obtained glue and the rest components of the friction body into an internal mixer, pressurizing the mixture under the pressure of 5-7MPa, mixing the mixture for 25-30 minutes at the temperature of less than or equal to 150 ℃, discharging the raw materials, cooling the discharged raw materials to room temperature, and then performing granulation treatment (the particle size is 1-3 mm) to obtain a mixture for later use:
2) Putting the mixture prepared in the step 1) and a steel backing into a designed die for pressing, wherein the pressure of a press is 3000N/cm 2 Keeping the pressure at 170-180 ℃, and obtaining a molded semi-finished product according to the thickness of the product for 1 mm and 1 minute by molding time:
3) And (3) performing thermal treatment on the semi-finished product prepared in the step 2) in an oven by adopting hot air circulation electric heating for 24 hours, gradually raising the temperature in the first 16 hours until the highest thermal treatment temperature reaches 220 ℃, keeping the thermal treatment temperature at 220 ℃ after 8 hours, fully reacting all raw materials, and ensuring complete maturity to prepare the synthetic brake shoe. The heat treatment adopts a sectional heat treatment mode, the temperature is gradually increased, the surface of the brake shoe is ensured to be consistent with the internal temperature of the brake shoe, the maturation degree of the composite material is ensured to be consistent, and the heat treatment can be effectively carried out by adopting hot air circulation electric heating.
Example 2
In this embodiment, the composite brake shoe comprises a friction body and a steel backing, wherein the friction body comprises the following components in percentage by mass: 8.5% of nitrile rubber, 0.8% of rubber accelerator, 0.6% of rubber vulcanizing agent, 0.6% of anti-aging agent, 9% of phenolic resin, 5% of nitrile rubber powder, 4% of brown corundum, 10% of crystalline flake graphite, 8% of barium sulfate, 3% of clay, 4% of reduced iron powder, 2.5% of ferrous sulfide, 4.5% of calcined petroleum coke, 3% of diatomite, 11% of rock wool, 9% of hemp fiber, 8% of potassium titanate fiber, 5% of steel fiber and 3.5% of glass fiber.
The preparation method of the friction body material comprises the following steps:
nitrile rubber is milled in two sections, the first section of the mill rolls are at the temperature of 40-45 ℃ and the roll spacing is 2-3 mm, raw rubber and rubber accelerator are added firstly, and the nitrile rubber is taken out and is placed; the second stage of roller temperature is 50-70 ℃, the roller distance is 3-4 mm, rubber vulcanizing agent and cutting knife are added, the mixture is uniformly mixed, anti-aging agent is added, and the mixture is uniformly mixed in a cutting knife thin-pass mode after all the mixture is mixed;
1) Adding the obtained glue and the rest components of the friction body into an internal mixer, pressurizing the mixture under the pressure of 5-7MPa, mixing the mixture at the temperature of less than or equal to 150 ℃ for 25-30 minutes, discharging the raw materials, cooling the raw materials to room temperature, and then performing granulation treatment (the granularity is 1-3 mm) to obtain a mixture for later use:
2) Putting the mixture prepared in the step 1) and a steel backing into a designed die for pressing, wherein the press force is 3000N/cm 2 Keeping the pressure at 170-180 ℃, and obtaining a molded semi-finished product according to the thickness of the product for 1 mm and 1 minute by molding time:
3) And (3) performing thermal treatment on the semi-finished product prepared in the step 2) in an oven by adopting hot air circulation electric heating for 24 hours, gradually raising the temperature in the first 16 hours until the highest thermal treatment temperature reaches 220 ℃, keeping the thermal treatment temperature at 220 ℃ after 8 hours, fully reacting all raw materials, and ensuring complete maturity to prepare the synthetic brake shoe. The heat treatment adopts a sectional heat treatment mode, the temperature is gradually increased, the surface of the brake shoe is ensured to be consistent with the internal temperature thereof, the maturation degree of the composite material is ensured to be consistent, and the effective heat treatment can be ensured by adopting hot air circulation electric heating.
The examples and comparative examples were subjected to weight measurement, wherein the comparative examples were cast iron brake shoes having the same profile. The detection results are shown in the table below, and the detection results show that the weight of the composite brake shoe is greatly reduced to about 1/3 of that of the cast iron brake shoe with the same shape, and the replacement operation is convenient.
The composite brake shoe of the embodiment is compared with the requirements of the low friction composite brake shoe in the TB/T3104.1-2020 standard, and the detection value completely meets the locomotive brake shoe industry standard.
The friction performance of the cast iron brake shoe of the first embodiment and the cast iron brake shoe of the comparative example is compared (see table 3 for details), under the same working condition, the brake tread temperature of the cast iron brake shoe of the first embodiment and the synthetic brake shoe of the comparative example is low, the brake tread temperature is reduced by 10 to 70 ℃ under the low-speed condition, and the brake tread temperature is reduced by about 30 ℃ in the whole test procedure.
In the first light parking brake under the no-load dry condition, the abrasion loss of the composite brake shoe of the embodiment is about 1/15 of the abrasion loss of the cast iron brake shoe of the comparative example; in the first light parking brake under the dry load condition, the abrasion loss of the composite brake shoe of the embodiment is about 1/10 of the abrasion loss of the cast iron brake shoe of the comparative example; under the condition of continuous braking, the abrasion loss of the composite brake shoe of the embodiment I is about 1/2 of that of the cast iron brake shoe of the comparative example; the wear of the composite brake shoe of the example was about 1/6 of the wear of the cast iron brake shoe of the comparative example in a light stop brake under wet conditions, and about 1/2 of the wear of the cast iron brake shoe of the comparative example after the entire test procedure was completed.
In the whole test procedure, the average friction coefficient of the synthetic brake shoe of the embodiment is 10 to 40 percent lower than that of the cast iron brake shoe of the comparative example, and the low-friction brake shoe friction coefficient requirement is further met (see table 4 for details). The friction coefficient of the composite brake shoe is more stable and centralized, the fluctuation range is small, the average friction coefficient range under each working condition is extremely smaller than that of a comparative cast iron brake shoe (see table 4 in detail), the friction coefficient is stable, the brake distance is stable, and the brake safety is improved.
In conclusion, the product does not contain asbestos, lead and other substances which are possibly harmful to human health, and belongs to an environment-friendly product; the friction performance of the invention can adjust the friction coefficient according to the braking requirement of the locomotive. The friction performance of the composite brake shoe can be changed by changing and adjusting the formula and the process, the friction coefficient of the composite brake shoe is stable and the braking curve is more concentrated under the same working condition, so that the range of the designed braking friction coefficient of the original vehicle is more satisfied; the brake shoe made of the composite material has the advantages of small specific gravity, weight of about 1/3 of that of the original matched brake shoe, easy carrying and transportation, more labor-saving brake shoe replacement and lower labor intensity, and simultaneously reduces the dead weight of the vehicle and the energy consumption of the locomotive; the original cast iron brake shoe has poor wear resistance, the service life is prolonged by 5 to 6 times, and the replacement frequency is reduced; the safety is good, and no spark is generated during braking, and the composite brake shoe can effectively avoid the dirt of the worn iron powder and the fire accident caused by the spark sprayed by braking. When the composite brake shoe is braked, no or little abrasion iron powder is scattered, so that fire accidents can be prevented, and the adverse effect on vehicles is reduced; the composite brake shoe has no groove in the use process, has very slight damage to the wheel and the steel rail, and prolongs the service life of the wheel and the steel rail; if the composite brake shoe is used for matching with a surface polished wheel and a bogie with good damping performance, the brake is more comfortable and stable, the noise generated by freight transportation is reduced by about 20 percent, namely, the noise level is 25 percent of the current noise level, and the product has obvious effect of reducing the noise; the friction body material of the invention adopts solid block-shaped glue and rubber powder which are blended for use, thereby ensuring the specific gravity of the bonding component and simultaneously considering the advantages of different performance raw materials. The solid block rubber has good wear resistance and elasticity, stronger rubber powder dispersibility and more stable performance due to blending use. The solid block rubber has high elasticity, good wear resistance, good cold resistance, high rubber powder strength, good dispersibility and stable molecular weight, and can well cure the brake shoe after vulcanization; the friction body material uses the sub-state metal compound, the sub-state metal can generate oxidation-reduction reaction under different conditions, because the temperature rise is large when the original cast iron brake shoe vehicle brakes, and when the temperature is high, the reduction reaction is generated, the heat can be effectively absorbed, the further temperature rise is prevented, and the reduced component is also the common component of the brake shoe, so the product performance can not be influenced; under the condition of proper ambient temperature, the carbon dioxide can be slowly oxidized, and the condition that the wheel is damaged due to overheating brake is adjusted.
Claims (2)
1. A composite brake shoe characterized by: the tile back comprises a tile back and a friction body, wherein the friction body comprises the following components in percentage by mass:
7-11% of nitrile rubber, 0.5-1% of rubber accelerator, 0.5-0.9% of rubber vulcanizing agent, 0.5-0.9% of anti-aging agent, 7-12% of powdery phenolic resin, 3-8% of nitrile rubber powder, 3-6% of brown corundum, 8-15% of flake graphite, 6-10% of barium sulfate, 1-5% of clay, 3-7% of reduced iron powder, 1-3% of ferrous sulfide, 3-6% of calcined petroleum coke, 1-5% of diatomite, 8-15% of rock wool, 7-12% of fibrilia, 5-10% of potassium titanate fiber, 3-8% of steel fiber and 2-5% of glass fiber.
2. A method of making a composite brake shoe according to claim 1 wherein: firstly, preparing a friction body, comprising the following steps: s1, open-milling nitrile rubber in two stages, wherein the roll temperature of the first stage is 40-45 ℃, the roll distance is 2-3 mm, adding crude rubber and a rubber accelerator, and discharging and standing; the second stage of roller temperature is 50-70 ℃, the roller distance is 3-4 mm, rubber vulcanizing agent and cutting knife are added, the mixture is uniformly mixed, anti-aging agent is added, and the mixture is uniformly mixed in a cutting knife thin-pass mode after all the mixture is mixed;
s2, adding the obtained mill batch and the rest components of the friction body into an internal mixer, pressurizing to 5-7MPa, mixing at the temperature of less than or equal to 150 ℃, intensively mixing for 25-30 minutes, pouring out the raw materials, cooling to room temperature, and granulating to obtain a mixture for later use; wherein the particle size is 1-3 mm;
s3, putting the prepared mixture and the steel backing into a die for pressing, wherein the press force is 3000N/cm 2 Keeping the pressure at 170-180 ℃, and obtaining a molded semi-finished product according to the thickness of the product for 1 mm and 1 minute by molding time:
s4, performing thermal treatment on the prepared semi-finished product in an oven by adopting hot air circulation electric heating for 24 hours, wherein the first 16 hours are heating stages until the highest thermal treatment temperature reaches 220 ℃, and then keeping the thermal treatment temperature at 220 ℃ for 8 hours, so that all raw materials are fully reacted, and thorough ripening is ensured, thus obtaining a friction body;
and finally, pressing the friction body and the shoe back to obtain the composite brake shoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211705069.5A CN115678202A (en) | 2022-12-29 | 2022-12-29 | Composite brake shoe and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211705069.5A CN115678202A (en) | 2022-12-29 | 2022-12-29 | Composite brake shoe and preparation method thereof |
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| CN115678202A true CN115678202A (en) | 2023-02-03 |
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| CN202211705069.5A Withdrawn CN115678202A (en) | 2022-12-29 | 2022-12-29 | Composite brake shoe and preparation method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5083643A (en) * | 1989-10-10 | 1992-01-28 | Abex Corporation | Noise abating brake shoe |
| CN1468890A (en) * | 2003-06-12 | 2004-01-21 | 山东大学 | Carbon fiber reinforced friction material and its prepn |
| US20100186823A1 (en) * | 2008-12-31 | 2010-07-29 | Eternal Chemical Co., Ltd. | Solvent-free conductive paste composition and solar cell element employing the same |
| CN102191015A (en) * | 2011-04-08 | 2011-09-21 | 复旦大学 | Hybrid fiber reinforced friction material for train braking and preparation method thereof |
| CN104099063A (en) * | 2014-05-04 | 2014-10-15 | 中国矿业大学 | Mine hoist hard magnetic brake shoe material formula and producing thereof |
| JP2015004037A (en) * | 2013-06-24 | 2015-01-08 | 日清紡ブレーキ株式会社 | Friction material |
| CN110628171A (en) * | 2019-08-13 | 2019-12-31 | 北京天仁道和新材料有限公司 | Friction material, long-service-life friction lining and preparation method thereof |
| CN112538234A (en) * | 2020-12-29 | 2021-03-23 | 沈阳远程摩擦密封材料有限公司 | 1: synthetic brake shoe replacing cast iron brake shoe |
| CN112852034A (en) * | 2021-01-29 | 2021-05-28 | 山东金麒麟股份有限公司 | Friction material, composite brake shoe and preparation method |
-
2022
- 2022-12-29 CN CN202211705069.5A patent/CN115678202A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5083643A (en) * | 1989-10-10 | 1992-01-28 | Abex Corporation | Noise abating brake shoe |
| CN1468890A (en) * | 2003-06-12 | 2004-01-21 | 山东大学 | Carbon fiber reinforced friction material and its prepn |
| US20100186823A1 (en) * | 2008-12-31 | 2010-07-29 | Eternal Chemical Co., Ltd. | Solvent-free conductive paste composition and solar cell element employing the same |
| CN102191015A (en) * | 2011-04-08 | 2011-09-21 | 复旦大学 | Hybrid fiber reinforced friction material for train braking and preparation method thereof |
| JP2015004037A (en) * | 2013-06-24 | 2015-01-08 | 日清紡ブレーキ株式会社 | Friction material |
| CN104099063A (en) * | 2014-05-04 | 2014-10-15 | 中国矿业大学 | Mine hoist hard magnetic brake shoe material formula and producing thereof |
| CN110628171A (en) * | 2019-08-13 | 2019-12-31 | 北京天仁道和新材料有限公司 | Friction material, long-service-life friction lining and preparation method thereof |
| CN112538234A (en) * | 2020-12-29 | 2021-03-23 | 沈阳远程摩擦密封材料有限公司 | 1: synthetic brake shoe replacing cast iron brake shoe |
| CN112852034A (en) * | 2021-01-29 | 2021-05-28 | 山东金麒麟股份有限公司 | Friction material, composite brake shoe and preparation method |
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Application publication date: 20230203 |