CN102161812A - Carbon-fiber-reinforced wear-resistant polyformaldehyde gear and preparation method thereof - Google Patents
Carbon-fiber-reinforced wear-resistant polyformaldehyde gear and preparation method thereof Download PDFInfo
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- CN102161812A CN102161812A CN 201110142559 CN201110142559A CN102161812A CN 102161812 A CN102161812 A CN 102161812A CN 201110142559 CN201110142559 CN 201110142559 CN 201110142559 A CN201110142559 A CN 201110142559A CN 102161812 A CN102161812 A CN 102161812A
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Abstract
The invention relates to a carbon-fiber-reinforced polyformaldehyde gear which is prepared from polyformaldehyde resin, chopped carbon fiber, molybdenum disulfide, calcium stearate, coupling agent and phenolic resin. The invention also relates to a preparation method of the carbon-fiber-reinforced polyformaldehyde gear, which comprises the following steps: carrying out composite surface treatment on the carbon fiber; and putting the raw materials into a high-speed mixer according to the percentage in the formula, sufficiently mixing, granulating, and carrying out injection molding in an injection molding machine. The composite surface treatment, which is carried out on the chopped carbon fiber, greatly improves the wettability of the carbon fiber surface, and maximally enhances the interfacial adhesiveness between the carbon fiber and the polyformaldehyde matrix, thereby greatly enhancing the mechanical properties of the composite material. The gear prepared from the carbon-fiber-reinforced wear-resistant polyformaldehyde has the advantages of low specific gravity, low noise, favorable wear resistance, favorable self-lubrication effect, chemical corrosion resistance, high specific strength, large specific modulus, small thermal expansion coefficient, static resistance and the like, and does not produce sparks, thereby being capable of replacing the original steel part. In addition, the invention reduces the labor intensity of workers, and lowers the energy consumption.
Description
Technical field
The present invention relates to a kind of mechanical transmissioning technology, particularly a kind of carbon fiber strengthens wear-resisting polyformaldehyde gear and preparation method thereof.
Background technology
In the mining industry mechanical means at home and abroad, a kind of small-sized drill is arranged in the hand-held pneumatic rig, and the gas motor is as the key part of hand-held pneumatic rig, its function is to the drilling rod transmitting torque, realizes the revolution of drilling tool.Motor is made up of housing, cover plate, gear, axle etc., and its middle gear is its core part, and the quality of gear wear resistance directly influences the performance and the life-span of gas motor.Gear turns round in the gas motor, not only will bear bigger frictional force and surging force, also needs good dimensional stability, also will be subjected to the influence of Working environment simultaneously, as corrosion such as dust, sand, acid, alkali, salt.Therefore require gear must have high anti-friction wear-resistant, the erosion resistance of complex environment and favorable mechanical performance.At present, the gear major part of using on the hand-held pneumatic rig is steel part high frequency nitriding processing again after processing, solve wear-resisting problem, even so also there is following shortcoming: than great, noise is big, complete processing is complicated, anti-friction wear-resistant is poor, be easy to generate spark when running up, labour intensity was big when the workman operated, energy consumption is big.
Summary of the invention
The technical problem to be solved in the present invention is at the deficiencies in the prior art, proposed a kind ofly have that outstanding anti-friction wear-resistant, self-lubricating effect are good, resist chemical, specific tenacity height, specific modulus is big, thermal expansivity is little, antistatic and do not produce spark, alleviate labor strength simultaneously, the carbon fiber of energy efficient strengthens wear-resisting polyformaldehyde gear and preparation method thereof.
The technical problem to be solved in the present invention is achieved through the following technical solutions, and a kind of carbon fiber strengthens the polyoxymethylene gear, is characterized in: adopt following raw materials by weight percent to make,
Polyformaldehyde resin 50-85 %, carbon fiber weak point are cut 5-20%, molybdenumdisulphide 5-20%, calcium stearate 1-3%, coupling agent 0.1-2%, resol 1-10%.
The preparation method that carbon fiber of the present invention strengthens the polyoxymethylene gear is:
At first carbon fiber being carried out compound surface handles.Concrete operations are as follows: the first step is cut into the 4-8mm weak point with carbon fiber filament cuts, and puts it into then in the cabinet-type electric furnace, with 300-600 ℃ of insulation 30-90 minute, stops heating then, cools to normal temperature with the furnace; The solution that second step cut the carbon fiber weak point after the oxidation with resol and coupling agent applies; Carbon fiber weak point after final step will apply is cut in air and is dried, and is placed in the side feed hopper stand-by.
Except that the carbon fiber weak point is cut; other drops into each raw material in the high mixer by described prescription per-cent; between 80-110 ℃, fully stir; various raw materials are mixed; and raw material is kept dry; water ratio is lower than 0.5%, enters parallel parallel dual-screw tablets press by e Foerderanlage then and carries out granulation, puts into injection moulding machine at last and carries out injection moulding.
The technical problem to be solved in the present invention can also come further to realize by the following technical programs, in the granulation process, through 9 heating zone heating and meltings, carries out tie rod, cooling, oven dry, pelletizing, oven dry, packing promptly then,
Prilling temperature: a district 150-190 ℃, two district 150-190 ℃, three district 150-190 ℃, four district 150-190 ℃, five district 160-200 ℃, six district 160-200 ℃, seven district 160-200 ℃, eight district 160-200 ℃, nine district 160-200 ℃.
The granulation time: from being fed to discharging is 3-5 minute, and the time that stops in the heating zone is 1-2 minute.
The present invention compared with prior art, the carbon fiber weak point is cut through compound surface and is handled, pass through oxide treatment, increased the functional group of carbon fiber surface greatly, resol and coupling agent react with the active function groups that generates again then, increased carbon fibre surface energy, thereby greatly improved the wetting property of carbon fiber surface, simultaneously because polyoxymethylene matrix and resol have good consistency, so improved the interfacial adhesion of carbon fiber and polyoxymethylene matrix to greatest extent, thereby improved the mechanical property of matrix material greatly.
Adopt carbon fiber to strengthen wear-resisting polyformaldehyde and make gear, proportion is little, noise is low, anti-friction wear-resistant is good, self-lubricating effect is good, resist chemical, specific tenacity height, specific modulus is big, thermal expansivity is little, antistatic and do not produce advantages such as spark, therefore replace original steel part, simultaneously also alleviate working strength of workers, saved energy consumption.Specific as follows:
(1) density is low, in light weight, noise is low.The density that carbon fiber strengthens wear-resisting polyformaldehyde is 1.4, than aluminium light half, lighter by 1/6 than steel; In light weight, shock attenuation result is good.So not only alleviate working strength of workers, and saved energy consumption.
(2) anti-friction wear-resistant is good, self-lubricating effect is good.Though the metal supporting capacity is big, the anti-attrition wear resistance is relatively poor, can not self-lubricating.Carbon fiber strengthens the anti-attrition wear resistance of wear-resisting polyformaldehyde than metal height, because contain carbon fiber and molybdenumdisulphide in this material, so frictional coefficient is little, self-lubricating effect is good.Particularly be used on the gas motor of mining industry mechanical means, effect is obvious especially.
(3) resist chemical.Carbon fiber strengthens polyoxymethylene has erosion resistance preferably to general acid, alkali, salt, grease and dust, sand, more much better than metallic substance and some inorganic materials.
(4) specific tenacity height, specific modulus height.Carbon fiber strengthens the specific tenacity of polyoxymethylene far above cement concrete, near in addition surpass steel part, belong to a kind of material of high-strength light.Weight/power ratio intensity height that is to say under the condition that obtains same intensity, strengthens polyoxymethylene with carbon fiber and can make product become lighter, can strengthen making it reach the requirement of intensity and hardness by flexible design, skeleton.
(5) thermal expansivity is little, and dimensional stability is good, prolongs life.The gap of gas motor middle gear can not be too big, otherwise pressurized air leaks in a large number, reduced the pressure of working chamber, thereby increased the air consumption of gas motor, reduced the performance of gas motor; The gap can not be too little, otherwise can increase the resistance of motion, reduces the mechanical efficiency of gas motor, even grind phenomenons such as cylinder, vexed car, parking.Gear in the gas motor is a metallic substance at present, because metallic substance expands with heat and contract with cold and frictional coefficient is big, so greatly reduce the performance of gas motor, and my the carbon fiber enhancing wear-resisting polyformaldehyde gear of company's research and development has solved this problem, improved the performance of gas motor, prolong the life-span of gas motor, thereby replaced metal gear.
(6) antistatic effect is good, runs up also can not produce spark.Particularly be used on the coal mine machinery equipment, metal gear is easy to generate spark, and carbon fiber enhancing wear-resisting polyformaldehyde gear can not produce spark, and is safe and reliable.
(7) reduce labor strength, save energy.About about 1.7 kilograms/, 2 gears are exactly 3.4 kilograms to the weight of metallic substance gear greatly; And carbon fiber strengthens the weight of wear-resisting polyformaldehyde gear at 0.3 kilogram/, and the gear weight of 2 kinds of differing materials differs 2.8 kilograms (2).Because this rig is a hand-held, promptly the workman holds operation, so every bench drill machine alleviates 2.8 kilograms weight, has just alleviated working strength of workers greatly, and has saved the energy.
Embodiment
A kind of carbon fiber strengthens the wear-resisting polyformaldehyde gear, adopts following raw materials by weight percent to make,
Polyformaldehyde resin 50-85 %, carbon fiber weak point are cut 5-20%, molybdenumdisulphide 5-20%, calcium stearate 1-3%, coupling agent 0.1-2%, resol 1-10%.
At first carbon fiber being carried out compound surface handles.Concrete operations are as follows: the first step is cut into the 4-8mm weak point with carbon fiber filament cuts, and puts it into then in the cabinet-type electric furnace, with 300-600 ℃ of insulation 30-90 minute, stops heating then, cools to normal temperature with the furnace; The solution that second step cut the carbon fiber weak point after the oxidation with resol and coupling agent applies; Carbon fiber weak point after final step will apply is cut in air and is dried, and is placed in the side feed hopper stand-by.
The carbon fiber weak point that compound surface was handled is cut to be placed in the side feed hopper and is added twin screw; other drops into each raw material in the high mixer by described prescription per-cent; between 80-110 ℃, fully stir; various raw materials are mixed; and raw material is kept dry; water ratio is lower than 0.5%, enters parallel parallel dual-screw tablets press by e Foerderanlage then and carries out granulation, puts in the loft drier of injection moulding machine oven dry at last and carries out injection moulding after 2-4 hour.
In the granulation process,, carry out tie rod, cooling, oven dry, pelletizing, oven dry, packing promptly then through 9 heating zone heating and meltings.
Prilling temperature: a district 150-190 ℃, two district 150-190 ℃, three district 150-190 ℃, four district 150-190 ℃, five district 160-200 ℃, six district 160-200 ℃, seven district 160-200 ℃, eight district 160-200 ℃, nine district 160-200 ℃.
The granulation time: from being fed to discharging is 3-5 minute, and the time that stops in the heating zone is 1-2 minute.
Claims (4)
1. a carbon fiber strengthens the wear-resisting polyformaldehyde gear, it is characterized in that: adopt following raw materials by weight percent to make,
Polyformaldehyde resin 50-85 %, carbon fiber weak point are cut 5-40%, molybdenumdisulphide 5-20%, calcium stearate 1-3%, coupling agent 0.1-2%, resol 1-10%.
2. the described carbon fiber of claim 1 strengthens the preparation method of wear-resisting polyformaldehyde gear, it is characterized in that: carbon fiber filament is cut into the 4-8mm weak point cuts, put it into then in the cabinet-type electric furnace, with 300-600 ℃ of insulation 30-90 minute, stop heating then, cool to normal temperature with the furnace; The solution that carbon fiber weak point after the above-mentioned oxidation is cut with resol and coupling agent applies, and the weight proportion of resol and coupling agent is 1 ~ 4:0.5 ~ 1; Carbon fiber weak point after applying cut in air dry; be placed on and add in the dual-screw pelletizer in the side feed hopper; by described prescription per-cent each raw material is dropped in the high mixer then; between 80-110 ℃, fully stir; various raw materials are mixed, and raw material is kept dry, water ratio is lower than 0.5%; enter parallel parallel dual-screw tablets press by e Foerderanlage then and carry out granulation, put into injection moulding machine at last and carry out injection moulding.
3. carbon fiber according to claim 2 strengthens the preparation method of wear-resisting polyformaldehyde gear, it is characterized in that: in the granulation process,, carry out tie rod, cooling, oven dry, pelletizing, oven dry, packing promptly then through 9 heating zone heating and meltings,
Prilling temperature: a district 150-190 ℃, two district 150-190 ℃, three district 150-190 ℃, four district 150-190 ℃, five district 160-200 ℃, six district 160-200 ℃, seven district 160-200 ℃, eight district 160-200 ℃, nine district 160-200 ℃.
4. granulation time: from being fed to discharging is 3-5 minute, and the time that stops in the heating zone is 1-2 minute.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101425594A CN102161812B (en) | 2011-05-30 | 2011-05-30 | Carbon-fiber-reinforced wear-resistant polyformaldehyde gear and preparation method thereof |
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| CN2011101425594A CN102161812B (en) | 2011-05-30 | 2011-05-30 | Carbon-fiber-reinforced wear-resistant polyformaldehyde gear and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537302A (en) * | 2011-12-30 | 2012-07-04 | 大连益利亚工程机械有限公司 | Gapless gear transmission multifunctional limiter |
| CN103497484A (en) * | 2013-09-06 | 2014-01-08 | 开滦能源化工股份有限公司 | High-modulus high-strength high-heatproofnesspolyoxymethylene composite material and preparation method thereof |
| CN106280229A (en) * | 2016-09-07 | 2017-01-04 | 芜湖德鑫汽车部件有限公司 | Plastic gear used for automobile air conditioning and preparation method thereof |
| CN106633608A (en) * | 2016-12-13 | 2017-05-10 | 无锡市四方达高分子材料有限公司 | Novel wear-resistant high-molecular material |
| CN106633613A (en) * | 2016-12-13 | 2017-05-10 | 无锡市四方达高分子材料有限公司 | Novel wear-resisting plastic gear |
| CN106633609A (en) * | 2016-12-13 | 2017-05-10 | 无锡市四方达高分子材料有限公司 | Abrasion-resistant plastic gear |
| CN113024989A (en) * | 2021-03-19 | 2021-06-25 | 爱驰汽车有限公司 | Modified polyformaldehyde, automobile accelerator pedal bushing and preparation method |
-
2011
- 2011-05-30 CN CN2011101425594A patent/CN102161812B/en active Active
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| 《摩擦学学报》 20100131 胡坤宏等 二硫化钼改性聚甲醛自润滑复合材料的微观摩擦学性能研究 第39-43页 1-4 第30卷, 第1期 * |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537302A (en) * | 2011-12-30 | 2012-07-04 | 大连益利亚工程机械有限公司 | Gapless gear transmission multifunctional limiter |
| CN102537302B (en) * | 2011-12-30 | 2014-12-31 | 大连益利亚工程机械有限公司 | Gapless gear transmission multifunctional limiter |
| CN103497484A (en) * | 2013-09-06 | 2014-01-08 | 开滦能源化工股份有限公司 | High-modulus high-strength high-heatproofnesspolyoxymethylene composite material and preparation method thereof |
| CN103497484B (en) * | 2013-09-06 | 2016-03-09 | 开滦能源化工股份有限公司 | Gao Mo, high-strength, high heat-resisting polyformaldehyde composite material and preparation method thereof |
| CN106280229A (en) * | 2016-09-07 | 2017-01-04 | 芜湖德鑫汽车部件有限公司 | Plastic gear used for automobile air conditioning and preparation method thereof |
| CN106633608A (en) * | 2016-12-13 | 2017-05-10 | 无锡市四方达高分子材料有限公司 | Novel wear-resistant high-molecular material |
| CN106633613A (en) * | 2016-12-13 | 2017-05-10 | 无锡市四方达高分子材料有限公司 | Novel wear-resisting plastic gear |
| CN106633609A (en) * | 2016-12-13 | 2017-05-10 | 无锡市四方达高分子材料有限公司 | Abrasion-resistant plastic gear |
| CN113024989A (en) * | 2021-03-19 | 2021-06-25 | 爱驰汽车有限公司 | Modified polyformaldehyde, automobile accelerator pedal bushing and preparation method |
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| Publication number | Publication date |
|---|---|
| CN102161812B (en) | 2012-07-18 |
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Owner name: CHANGZHOU SHENYING CARBON PLASTIC COMPOSITE MATERI Free format text: FORMER OWNER: LIANYUNGANG YINGYOU CARBON PLASTIC MATERIAL CO., LTD. Effective date: 20130904 |
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Effective date of registration: 20130904 Address after: 213100 Jiangsu province Changzhou Tenglong Economic Development Zone Wujin Road No. 2 Patentee after: Changzhou Shenying Carbon Plastic Composite Materials Co., Ltd. Address before: 222000, Zhenxing Road, Haizhou Economic Development Zone, Haizhou District, Jiangsu, Lianyungang, 1 Patentee before: Lianyungang Yingyou Carbon Plastic Material Co., Ltd. |