MC nylon is a vibration-damping and wear-resistant material instead of nonferrous metals and alloy steel in machinery. A 400 kg nylon product, the actual volume is equivalent to 2.7 tons of steel or 3 tons of bronze. The use of MC nylon parts not only improves the mechanical efficiency and reduces the maintenance, but also generally improves the service life by 4-5 times. MC nylon is a new engineering plastic. Because of its excellent comprehensive properties, its position in engineering plastics has risen rapidly, and it has become an important material with more and more extensive uses.
(1) has high strength and can bear load for a long time;
(2) it has good resilience, can be bent without deformation, and at the same time, it maintains toughness and is resistant to repeated impact;
(3) Wear resistance and self-lubrication, providing better working performance than bronze cast iron, carbon steel and phenolic laminate in oil-free (or deoiling) lubrication applications, reducing consumption and saving energy;
(4) Noise absorption and shock absorption. The modulus of MC nylon is much smaller than that of metal, which greatly attenuates vibration and provides a better practical way to prevent noise than metal.
(5) Compared with metal, MC nylon has low hardness and does not damage worn parts;
(6) Low mc coefficient makes it possible for it to be widely used in friction parts;
(7) High chemical stability, resistance to alkali, alcohol, ether, hydrocarbon, weak acid, lubricating oil, detergent and water (seawater), odorless, nontoxic, tasteless and rustless, which provides excellent conditions for its wide application in alkali corrosion resistance, environmental protection and sanitation, food, textile printing and dyeing, etc.
(8) Simplify machine maintenance, save labor, have excellent mechanical cutting performance and improve labor productivity.
(9)MC nylon is limited to the following environments and media:
A. The service temperature exceeds120℃ for a long time;
B, strong acid, phenol, sodium chlorate, barium chloride, etc. ;
C, key parts of high-precision machines. There are different varieties of MC nylon according to different uses, mainly including the following:
1: MC nylon (ivory white): The characteristics of unmodified cast nylon 6 are very close to those of nylon 66, with good comprehensive performance, high strength, stiffness and hardness, creep resistance, wear resistance, thermal aging resistance and good machinability.
2: MC 90 1 (blue): This modified nylon 6 has striking blue color, higher toughness, better flexibility and fatigue resistance than ordinary cast nylon, which proves to be an ideal material for gears, racks and transmission gears.
3:PA6+ oil (green): This cast nylon 6 is a veritable self-lubricating nylon, which is specially developed for manufacturing parts that cannot be lubricated, with high load and low running speed. The application range of nylon is greatly broadened, and the friction coefficient is lower (can be reduced by 50%) and the wear resistance is improved (can be increased by 10 times) than that of ordinary nylon.
4:PA6+ Molybdenum disulfide (grayish black): It contains Molybdenum disulfide powder, which can improve the bearing capacity and wear resistance of unmodified cast nylon without affecting its impact resistance and fatigue resistance. Widely used in manufacturing gears, bearings, star wheels and shaft sleeves.
5:PA6+ solid lubricant (gray): The patented cast nylon 6 formula contains solid lubricant. This material has self-lubrication, excellent friction, outstanding wear resistance and pressing speed (5 times higher than ordinary cast nylon). It is especially suitable for moving parts that run at high speed and cannot be lubricated, and it is a perfect supplement to oil-containing nylon. pulley
Traditional pulleys are mostly cast iron or steel castings, which have high bearing capacity, but poor wear resistance, which damages the wire rope. In addition, the process of cast steel pulley is complicated, and the actual cost is higher than that of MC nylon pulley. The pulley made of MC nylon has high strength and is easy to process. As long as the formula is suitable, it can also be made into pulleys with different performance requirements. After using MC nylon pulley, the life of pulley is increased by 4-5 times, and the life of wire rope is increased by 10 times. Compared with "metal pulley" and "MC nylon pulley", MC nylon pulley can reduce the weight of boom and boom head by 70%, improve production efficiency, enhance lifting function and overall mechanical performance, and facilitate maintenance, disassembly and oil-free lubrication. Many foreign crane manufacturers, such as Liebherr of Germany and Kato of Japan, have been using MC nylon pulleys since 1970s. At present, the domestic 12- 125 seven-stage truck crane has been fully applied. Taking LT40 truck crane as an example, the application of MC nylon pulley can save the maintenance cost of wire rope and pulley by 654.38 million yuan.
Gear worm wheel
Making gears and worm wheels with MC nylon can greatly reduce noise. Take 400Kg air hammer and concrete mixer as examples. 400Kg air hammer (small) gear m=8, z= 19, motor power 40KW. The original phenolic pressure plate was manufactured and used for about half a year, and then it was changed to MC nylon iron skeleton structure. It has been used for 7 years, but it is still not damaged. Concrete mixer (small) gear m= 10, z=20, motor power 7KW. The original metal gear is noisy and the tooth surface is seriously worn. After changing to MC nylon gear, the transmission is stable and low noise, and the service life is over 10 years.
slider
In construction machinery, the slider is almost an indispensable part, such as the slider used to support the boom of automobile crane, which used to be made of brass. Now, after switching to MC nylon slider, the service life is improved by 4-5 times. MC nylon slider has a long service life and can maintain lubrication performance for a long time after one-time refueling. At the same time, it also has the advantages of impact resistance, vibration resistance, fatigue resistance, low noise, light weight, convenient assembly and wear resistance.
Shaft sleeve, bearing bushing and bearing
In construction machinery, it is very common to use MC nylon instead of copper and babbitt alloy to make shaft sleeves and bearing shells of various sizes. Features: good wear resistance and self-lubricating performance, high PV value in the current general thermoplastics; Small friction coefficient, impact resistance, not easy to hold the shaft, not melting, not damaging the journal; Long lubrication cycle, reduced maintenance, strong adaptability to harsh environment and long service life. For example, the guy balance shaft sleeve of WK- 10 excavator is φ200×φ 160× 160, and has always been made of ZQA 19-4. Because of the heavy dust and poor lubrication conditions, the sleeve wears quickly. After switching to MC nylon, according to the compressive strength of MC nylon, the theoretical load is calculated to be 288-345T, and the actual load is140 t. After being used in the open air at 40-42℃ for more than 5 years, after mining 5.265 million tons of ore, the surface is smooth and a good oil film has been formed, which proves that there is basically no wear.
Piston ring, support ring
The characteristics of using MC nylon as piston ring are: light weight (about 15% of bronze weight) to reduce movement loss and save mechanical power; Good sliding performance, small difference between static and dynamic friction coefficients, and not sticky like metal; Good foreign body burying performance, which can avoid cylinder liner abrasion; Oil-free self-lubrication, good sealing, difficult oil leakage, long service life and improved work efficiency. The life test of hydraulic cylinder MC nylon support ring was carried out on the HSG63/35×700 hydraulic cylinder test bench of Yangtze River Hydraulic Components Research Institute. Under high pressure and heavy load, it impacted continuously for 320,000 times, with a total reciprocating stroke of 150km, which proved that the durability and reliability were good and met the requirements of national standards.
Drum, drum
Because MC nylon has the properties of drug resistance, wear resistance and self-lubrication, it is suitable to be used as the outer lining of roller or metal roller, and is suitable for conveying guide roller, reverse roller and walking roller. Compared with other materials, MC nylon has the advantages of long service life, easy processing, less oiling times, no oil leakage, no rust, no oil pollution and no rust pollution.
Other aspects/ways
In addition to the above introduction, MC nylon is also used in many aspects, such as: internal mixer idler, valve body, valve core, ball valve washer, insulating sleeve, guide plate, rubber baffle, etc. There are moving axle boxes, bushings, moving wheel springs, withdrawal sleeves, retaining rings, crosshead pulleys, small square tiles at the small end of rocker arms, etc. In shipbuilding industry, there are bearings, rudder bearings, water pump bearings, water pump impellers, pulleys and sliders, sprockets, handles, anti-electricity, seals and so on.
The application scope of MC nylon is wider and wider, and the effect is more and more obvious. People never realized this. From the test to the application, they gradually realized the superiority and importance of the application of MC nylon, and MC nylon achieved great economic benefits. The more ideal products of MC nylon need to be studied, explored, trial-produced and tried by us and our brother companies. In order to facilitate users and serve them, our company can wholeheartedly design, mold-open and produce finalized supporting products for you. All product specifications are subject to user requirements and drawings. We will actively cooperate with you to solve application problems and technical problems, and sincerely serve you.