CN111961945A - Friction block containing manganese-based complex powder and preparation method thereof - Google Patents
Friction block containing manganese-based complex powder and preparation method thereof Download PDFInfo
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- CN111961945A CN111961945A CN202010726476.9A CN202010726476A CN111961945A CN 111961945 A CN111961945 A CN 111961945A CN 202010726476 A CN202010726476 A CN 202010726476A CN 111961945 A CN111961945 A CN 111961945A
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- 239000000843 powder Substances 0.000 title claims abstract description 77
- 239000011572 manganese Substances 0.000 title claims abstract description 65
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 64
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 40
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 38
- 238000007731 hot pressing Methods 0.000 claims abstract description 38
- 229920001971 elastomer Polymers 0.000 claims abstract description 29
- 239000005060 rubber Substances 0.000 claims abstract description 29
- 239000005011 phenolic resin Substances 0.000 claims abstract description 28
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 25
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 22
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 21
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 21
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 21
- 239000010428 baryte Substances 0.000 claims abstract description 21
- 229910052601 baryte Inorganic materials 0.000 claims abstract description 21
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 21
- 239000011593 sulfur Substances 0.000 claims abstract description 21
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 21
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 20
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910000604 Ferrochrome Inorganic materials 0.000 claims abstract description 14
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 9
- 239000011707 mineral Substances 0.000 claims abstract description 9
- 238000007711 solidification Methods 0.000 claims abstract description 9
- 230000008023 solidification Effects 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 8
- 229910052681 coesite Inorganic materials 0.000 claims description 8
- 229910052906 cristobalite Inorganic materials 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052682 stishovite Inorganic materials 0.000 claims description 8
- 229910052905 tridymite Inorganic materials 0.000 claims description 8
- 229910052593 corundum Inorganic materials 0.000 claims description 7
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 150000003505 terpenes Chemical class 0.000 claims description 2
- 235000007586 terpenes Nutrition 0.000 claims description 2
- WJQOZHYUIDYNHM-UHFFFAOYSA-N 2-tert-Butylphenol Chemical compound CC(C)(C)C1=CC=CC=C1O WJQOZHYUIDYNHM-UHFFFAOYSA-N 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000002783 friction material Substances 0.000 abstract description 5
- 238000007670 refining Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 7
- -1 tert-butyl phenolic resin Chemical compound 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 238000011049 filling Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Inorganic materials O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 1
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0094—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with organic materials as the main non-metallic constituent, e.g. resin
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Braking Arrangements (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention belongs to the technical field of friction materials, and particularly relates to a friction block containing manganese-based complex powder, which comprises the following raw material components in percentage by weight: 6 to 12 percent of nitrile rubber, 2.5 to 3 percent of sulfur, 0.5 to 1 percent of accelerator M, 0.5 to 1 percent of anti-aging agent, 7 to 9 percent of phenolic resin, 14 to 20 percent of barite, 11 to 25 percent of calcium carbonate, 9 to 15 percent of magnesium oxide, 12 to 14 percent of ferrochrome mineral powder and 10 to 30 percent of manganese-based complex powder; the preparation method of the friction block comprises the following steps: mixing nitrile rubber; then adding other raw material components except the nitrile rubber for roll refining to prepare a film and then discharging the film; carrying out hot-pressing solidification on the rubber sheet in an upper hot die of a press; carrying out heat treatment on the product after hot pressing and curing; grinding to obtain friction blocks; according to the invention, by adding the manganese-based complex powder raw material, the prepared motor friction block has high stability of friction coefficient at high temperature and normal temperature, strong hardness and low wear rate, the comprehensive use performance of the friction block is obviously improved, and the safety problem is ensured when the friction block is used for elevator braking.
Description
Technical Field
The invention belongs to the technical field of friction materials, and particularly relates to a friction block containing manganese-based complex powder and a preparation method thereof.
Background
The motor friction block is mainly used for elevator braking, is an important consumable part for ensuring safety, and is required to have higher and stable friction coefficient and good wear resistance in use.
At present, the motor friction block is made of reinforced fiber, nitrile rubber, styrene butadiene rubber, phenolic resin and various filling materials, such as barite, alumina, magnesia, feldspar powder, wollastonite and the like, as well as various matching materials for rubber, such as accelerator M, anti-aging agent, sulfur and the like, and the materials are mixed by an internal mixer or an open mill, and then are processed into a sheet, hot-press molded and ground to finally prepare the motor friction block. The friction block of the existing motor generates heat due to the braking action of the friction block of the motor during use, and the friction performance of the friction block is often in an undesirable state that the friction coefficient is unstable at high temperature and normal temperature and the abrasion is increased due to the influence of heat.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a friction block containing manganese-based complex powder, and the prepared motor friction block has high stability of friction coefficient at high temperature and normal temperature and low wear rate by adding the manganese-based complex powder, so that the comprehensive use performance of the friction block is obviously improved, and the safety problem is ensured by applying the friction block to elevator braking.
In order to achieve the purpose, the invention adopts the following technical scheme:
a friction block containing manganese-based complex powder comprises the following raw material components in percentage by weight: 6-12% of nitrile butadiene rubber, 2.5-3% of sulfur, 0.5-1% of accelerator M, 0.5-1% of anti-aging agent, 7-9% of phenolic resin, 14-20% of barite, 11-25% of calcium carbonate, 8-15% of magnesium oxide, 12-14% of ferrochrome mineral powder and 10-30% of manganese-based complex powder.
The manganese-based complex powder is manganese ore slag generated after manganese ore powder is smelted by manganese ore and manganese is extracted, and the inventor of the scheme can obtain the manganese ore slag by sampling and analyzing the manganese ore slag, wherein the manganese ore slag contains MnO in components2In addition, it contains Al as other component2O3、SiO2And CaO, etc., butThe manganese-based complex powder does not contain forbidden substances in friction material products such as hexavalent chromium, lead and the like, and further research finds that the manganese (Mn) contained in the manganese-based complex powder is about 7-12 percent, is a manganese-based solid solution powdery material, is suitable for friction materials in performance, and is a new material with excellent valence-to-price ratio. Through a plurality of experimental researches, the inventor discovers that the friction block prepared by adding the manganese-based complex powder raw material has good friction coefficient stability and small wear rate under normal temperature and high temperature conditions, remarkably improves the comprehensive use performance of the friction block, ensures the safety problem when the friction block is used for elevator braking, and meets the use requirements of the friction block under high-temperature and high-speed environments.
Further, according to the invention, the friction block containing the manganese-based complex powder comprises the following raw material components in percentage by weight: 12% of nitrile butadiene rubber, 3% of sulfur, 1% of accelerator M, 1% of anti-aging agent, 8% of phenolic resin, 20% of barite, 20% of calcium carbonate, 13% of magnesium oxide, 12% of ferrochrome mineral powder and 10% of manganese-based complex powder.
Further, according to the invention, the friction block containing the manganese-based complex powder comprises the following raw material components in percentage by weight: 12% of nitrile butadiene rubber, 3% of sulfur, 1% of accelerator M, 1% of anti-aging agent, 8% of phenolic resin, 18% of barite, 15% of calcium carbonate, 10% of magnesium oxide, 12% of ferrochrome mineral powder and 20% of manganese-based complex powder.
Further, according to the invention, the friction block containing the manganese-based complex powder comprises the following raw material components in percentage by weight: 12% of nitrile rubber, 3% of sulfur, 1% of accelerator M, 1% of anti-aging agent, 8% of phenolic resin, 14% of barite, 11% of calcium carbonate, 8% of magnesium oxide, 12% of ferrochrome mineral powder and 30% of manganese-based complex powder.
Preferably, the nitrile rubber is selected from one of nitrile rubber DN401, nitrile rubber 2865C and nitrile rubber 3330F.
Preferably, the phenolic resin is one selected from 803-L terpene phenolic resin, 2402 tert-butyl phenolic resin and 2123 phenolic resin.
Preferably, the manganese-based complex powder component contains 7 to 12 weight percent of MnO213-20% of Al2O3、33-40％SiO2、23-45％CaO。
According to the present invention, the types of the sulfur, the accelerator M, the antioxidant, the barite, the calcium carbonate, the magnesium oxide and the chromite powder are not particularly limited, and may be those known to those skilled in the art, and specifically, the antioxidant 264, the antioxidant 1076, the antioxidant 168, or a combination thereof may be mentioned.
The invention also provides a preparation method of the friction block containing the manganese-based complex powder, which comprises the following steps:
(1) preparing each raw material properly according to a component formula;
(2) putting the prepared nitrile rubber into a mixing mill to mix the nitrile rubber until the nitrile rubber has uniform roll wrapping performance;
(3) adding prepared sulfur, an accelerator M, an anti-aging agent, phenolic resin, barite, calcium carbonate, magnesium oxide, chromite powder and manganese-based complex powder into the mixing roll in the step (2), mixing for 5-7min, uniformly mixing to form a film, and discharging the film from a lower roll;
(4) carrying out hot-pressing solidification on the rubber sheet prepared in the step (3) in a pressing die on a pressing machine;
(5) putting the product obtained after the hot-pressing solidification in the step (4) into a heat treatment device, heating the product to 175 ℃ from room temperature, preserving the heat for 2h at the temperature of 170-175 ℃, and then cooling the product to room temperature along with the heat treatment device;
(6) and finally, taking out the product and grinding the product to obtain the friction block.
Further, according to the present invention, the step (3) of putting the film into the slitter to form the adhesive tape which is easy to be put into the die on the press.
Specifically, the hot-pressing temperature of the hot-pressing curing in the step (4) is 165-170 ℃, the hot-pressing pressure is 8-10MPa, and the hot-pressing time is 180-200 s.
Compared with the prior art, the invention has the following technical effects:
1. the novel manganese-based complex powder as the filling material is added to strengthen the components of the friction block, so that the prepared motor friction block has high stability of friction coefficient at high temperature and normal temperature, strong hardness and low wear rate, the comprehensive use performance of the friction block is obviously improved, the safety problem is ensured when the friction block is used for elevator braking, and the use requirement of the friction block in high-temperature and high-speed environments is met.
2. The manganese-based complex powder is selected to be used as the filling material for preparing the motor friction block, so that the resource is recycled, and the economic cost is saved.
3. According to the invention, the rubber sheet formed by uniform mixing is placed into the slitter to be made into the rubber strip, so that the rubber strip is conveniently placed into the pressing die for hot pressing in the hot pressing and curing process steps, the preparation process of the friction block is ensured to be stably, uninterruptedly and orderly carried out, and the working efficiency of friction block preparation is greatly improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present invention with reference to specific examples. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
All the starting materials in the present invention, the sources of which are not particularly limited, may be either commercially available or prepared according to conventional methods well known to those skilled in the art.
All the raw materials used in the present invention are not particularly limited in purity, and the present invention preferably employs a purity which is conventional in the field of analytical purification or composite materials.
Example 1
A friction block containing manganese-based complex powder comprises the following raw material components in percentage by weight: nitrile butadiene rubber DN 40112%, sulfur 3%, accelerator M1%, anti-aging agent 2641%, 2123 phenolic resin 8%, barite 20%, calcium carbonate 20%, magnesium oxide 13%, ferrochromium ore powder 12% and manganese-based complex powder 10% (the components contain MnO 12% by weight)213% of Al2O330% SiO245% CaO).
The preparation method of the friction block containing the manganese-based complex powder comprises the following steps:
(1) preparing each raw material properly according to a component formula;
(2) putting the prepared nitrile rubber DN401 into a mixing roll to mix until the nitrile rubber DN401 has uniform roll wrapping performance;
(3) adding prepared sulfur, an accelerator M, an anti-aging agent 264, 2123 phenolic resin, barite, calcium carbonate, magnesium oxide, chromite powder and manganese-based complex powder (the components of which contain 12 percent by weight of MnO) into the mixing roll in the step (2)213% of Al2O330% SiO245% of CaO), mixing and roll-milling for 6min, uniformly mixing to form a rubber sheet, then discharging a lower roller of the rubber sheet, and then putting the rubber sheet into a slitter to prepare a rubber strip which is convenient to be arranged in a pressing die on a press and has the specification of 10 x 40 x 3 mm;
(4) carrying out hot-pressing curing on the rubber sheet prepared in the step (3) in a pressing die on a press, wherein the hot-pressing temperature is 168 ℃, the hot-pressing pressure is 9MPa, and the hot-pressing time is 190 s;
(5) putting the product obtained after hot-pressing solidification in the step (4) into a heat treatment device, heating the product to 170 ℃ from room temperature, preserving the heat for 2 hours at the temperature of 170 ℃, and then cooling the product to room temperature along with the heat treatment device;
(6) and finally, taking out the product and grinding the product to obtain the friction block.
Example 2
A friction block containing manganese-based complex powder comprises the following raw material components in percentage by weight: nitrile butadiene rubber DN 40112%, sulfur 3%, accelerator M1%, anti-aging agent 2641%, 2402 tert-butyl phenolic resin 8%, barite 18%, calcium carbonate 15%, magnesium oxide 10%, ferrochromium ore powder 12% and manganese-based complex powder 20% (the components contain MnO with the weight percentage of 12%)213% of Al2O330% SiO245% CaO).
The preparation method of the friction block containing the manganese-based complex powder comprises the following steps:
(1) preparing each raw material properly according to a component formula;
(2) putting the prepared nitrile rubber DN401 into a mixing roll to mix until the nitrile rubber DN401 has uniform roll wrapping performance;
(3) adding prepared sulfur, an accelerator M, an anti-aging agent 264, 2402 tert-butyl phenolic resin, barite, calcium carbonate, magnesium oxide, chromite powder and manganese-based complex powder (the components of which contain 12 percent by weight of MnO) into the mixing roll in the step (2)213% of Al2O330% SiO245% of CaO), mixing and roll-milling for 6min, uniformly mixing to form a rubber sheet, then discharging a lower roller of the rubber sheet, and then putting the rubber sheet into a slitter to prepare a rubber strip which is convenient to be arranged in a pressing die on a press and has the specification of 10 x 40 x 3 mm;
(4) carrying out hot-pressing curing on the rubber sheet prepared in the step (3) in a pressing die on a press, wherein the hot-pressing temperature is 168 ℃, the hot-pressing pressure is 9MPa, and the hot-pressing time is 190 s;
(5) putting the product obtained after hot-pressing solidification in the step (4) into a heat treatment device, heating the product to 170 ℃ from room temperature, preserving the heat for 2 hours at the temperature of 170 ℃, and then cooling the product to room temperature along with the heat treatment device;
(6) and finally, taking out the product and grinding the product to obtain the friction block.
Example 3
A friction block containing manganese-based complex powder comprises the following raw material components in percentage by weight: nitrile butadiene rubber DN 40112%, sulfur 3%, accelerator M1%, anti-aging agent 2641%, 2402 tert-butyl phenolic resin 8%, barite 14%, calcium carbonate 11%, magnesium oxide 8%, ferrochromium ore powder 12% and manganese-based complex powder 30% (the components contain MnO with the weight percentage of 12%)213% of Al2O330% SiO245% CaO).
The preparation method of the friction block containing the manganese-based complex powder comprises the following steps:
(1) preparing each raw material properly according to a component formula;
(2) putting the prepared nitrile rubber DN401 into a mixing roll to mix until the nitrile rubber DN401 has uniform roll wrapping performance;
(3) adding prepared sulfur and accelerator into the mixing roll in the step (2)M, age inhibitor 264, 2402 tert-butyl phenolic resin, barite, calcium carbonate, magnesium oxide, ferrochromium ore powder and manganese-based complex powder (the components contain 12 wt% of MnO)213% of Al2O330% SiO245% of CaO), mixing and roll-milling for 6min, uniformly mixing to form a rubber sheet, then discharging a lower roller of the rubber sheet, and then putting the rubber sheet into a slitter to prepare a rubber strip which is convenient to be arranged in a pressing die on a press and has the specification of 10 x 40 x 3 mm;
(4) carrying out hot-pressing curing on the rubber sheet prepared in the step (3) in a hot-pressing die on a press, wherein the hot-pressing temperature is 168 ℃, the hot-pressing pressure is 9MPa, and the hot-pressing time is 190 s;
(5) putting the product obtained after hot-pressing solidification in the step (4) into a heat treatment device, heating the product to 170 ℃ from room temperature, preserving the heat for 2 hours at the temperature of 170 ℃, and then cooling the product to room temperature along with the heat treatment device;
(6) and finally, taking out the product and grinding the product to obtain the friction block.
Comparative example
A motor friction block comprises the following raw material components in percentage by weight: nitrile butadiene rubber DN 40112%, sulfur 3%, accelerator M1%, anti-aging agent 2641%, 2402 tert-butyl phenolic resin 8%, barite 20%, calcium carbonate 25%, magnesium oxide 15% and ferrochromium ore powder 15%.
The preparation method of the motor friction block comprises the following steps:
(1) preparing the raw materials properly according to the formula of the components;
(2) putting the prepared nitrile rubber DN401 into a mixing roll to mix until the nitrile rubber DN401 has uniform roll wrapping performance;
(3) adding prepared sulfur, an accelerator M, an anti-aging agent 264, 2402 tert-butyl phenolic resin, barite, calcium carbonate, magnesium oxide and chromite powder into the mixing mill in the step (2), mixing and roll-refining for 6min, uniformly mixing to form a rubber sheet with the specification of 1500 x 40 x 3mm, then discharging the rubber sheet from a lower roll, and then putting the rubber sheet into a slitter to prepare a rubber strip which is convenient to be arranged in a pressing die on a press and has the specification of 10 x 40 x 3 mm;
(4) carrying out hot-pressing curing on the rubber sheet prepared in the step (3) in a hot-pressing die on a press, wherein the hot-pressing temperature is 168 ℃, the hot-pressing pressure is 9MPa, and the hot-pressing time is 190 s;
(5) putting the product obtained after hot-pressing solidification in the step (4) into a heat treatment device, heating the product to 170 ℃ from room temperature, preserving the heat for 2 hours at the temperature of 170 ℃, and then cooling the product to room temperature along with the heat treatment device;
(6) and finally, taking out the product and grinding the product to obtain the friction block.
The friction blocks prepared in the examples 1 to 3 and the comparative example were tested at different temperatures, and the friction coefficient stability, shore hardness and total wear rate performance indexes of the friction block under normal temperature and high temperature conditions were compared, except that the manganese-based complex powder raw material was added in the examples 1 to 3 and the manganese-based complex powder raw material was not added in the comparative example.
According to the standard requirements of the friction material for GB/T11834-2011 industrial machinery, the performance index test results are shown in Table 1:
the experimental results of table 1 show that: the friction block prepared by the invention has small friction coefficient change under the conditions of normal temperature and high temperature, and the friction stability is superior to that of the comparative example; the comprehensive use performance of the prepared friction block is optimal when the content of the added manganese-based complex powder is controlled to be 20% of the total amount of the formula.
The preferred embodiments of the present invention have been described in detail with reference to the examples, but the present invention is not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. The friction block containing the manganese-based complex powder is characterized by comprising the following raw material components in percentage by weight: 6-12% of nitrile butadiene rubber, 2.5-3% of sulfur, 0.5-1% of accelerator M, 0.5-1% of anti-aging agent, 7-9% of phenolic resin, 14-20% of barite, 11-25% of calcium carbonate, 8-15% of magnesium oxide, 12-14% of ferrochrome mineral powder and 10-30% of manganese-based complex powder.
2. The friction block containing manganese-based complex powder according to claim 1, comprising the following raw material components in percentage by weight: 12% of nitrile rubber, 3% of sulfur, 1% of accelerator M, 1% of anti-aging agent, 8% of phenolic resin, 20% of barite, 20% of calcium carbonate, 13% of magnesium oxide, 12% of ferrochrome mineral powder and 10% of manganese-based complex powder.
3. The friction block containing manganese-based complex powder according to claim 1, comprising the following raw material components in percentage by weight: 12% of nitrile butadiene rubber, 3% of sulfur, 1% of accelerator M, 1% of anti-aging agent, 8% of phenolic resin, 18% of barite, 15% of calcium carbonate, 10% of magnesium oxide, 12% of ferrochrome mineral powder and 20% of manganese-based complex powder.
4. The friction block containing manganese-based complex powder according to claim 1, comprising the following raw material components in percentage by weight: 12% of nitrile rubber, 3% of sulfur, 1% of accelerator M, 1% of anti-aging agent, 8% of phenolic resin, 14% of barite, 11% of calcium carbonate, 8% of magnesium oxide, 12% of ferrochrome mineral powder and 30% of manganese-based complex powder.
5. The friction block containing manganese-based complex powder according to any one of claims 1 to 4, wherein said nitrile rubber is one selected from the group consisting of nitrile rubber DN401, nitrile rubber 2865C, and nitrile rubber 3330F.
6. The friction block containing manganese-based complex powder according to any one of claims 1 to 4, wherein said phenolic resin is one selected from 803-L terpene phenolic resin, 2402 t-butyl phenol phenolic resin, 2123 phenolic resin.
7. Friction block containing a manganese-based complex powder according to any one of claims 1 to 4, characterised in that the manganese-based complex powder composition contains MnO in a percentage by weight of 7 to 12%213-20% of Al2O333-40% of SiO2And 23-45% of CaO.
8. The preparation method of the manganese-based complex powder friction block is characterized by comprising the following steps of:
(1) preparing each raw material properly according to a component formula;
(2) putting the prepared nitrile rubber into a mixing mill to mix the nitrile rubber until the nitrile rubber has uniform roll wrapping performance;
(3) adding prepared sulfur, an accelerator M, an anti-aging agent, phenolic resin, barite, calcium carbonate, magnesium oxide, chromite powder and manganese-based complex powder into the mixing roll in the step (2), mixing for 5-7min, uniformly mixing to form a film, and discharging the film from a lower roll;
(4) carrying out hot-pressing solidification on the rubber sheet prepared in the step (3) in a pressing die on a pressing machine;
(5) putting the product obtained after the hot-pressing solidification in the step (4) into a heat treatment device, heating the product to 175 ℃ from room temperature, preserving the heat for 2h at the temperature of 170-175 ℃, and then cooling the product to room temperature along with the heat treatment device;
(6) and finally, taking out the product and grinding the product to obtain the friction block.
9. The method for preparing a friction block containing manganese-based complex powder according to claim 8, wherein said step (3) is to put the rubber sheet into a slitter to form a rubber strip which is easy to be put into a die on a press.
10. The method as claimed in claim 8, wherein the hot pressing temperature of the hot pressing and curing in step (4) is 165-170 ℃, the hot pressing pressure is 8-10MPa, and the hot pressing time is 180-200 s.
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Denomination of invention: A friction block containing manganese based complex powder and its preparation method Effective date of registration: 20230510 Granted publication date: 20220304 Pledgee: Anhui Guangde Rural Commercial Bank Co.,Ltd. Qiuchun Branch Pledgor: ANHUI LONGXING SEALING ELEMENT CO.,LTD. Registration number: Y2023980040281 |
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