The Classification of the Plastic Gear (Part two)
Gears made of PC have a very beautiful appearance, because the material is colorless and transparent. They can be installed in precision instruments for gear transmission or as a craft decoration, but the gears made of PC will have radial tooth deformation. For such defects, accurate gear simulation is required.
PEEK gears
Polyether ether ketone (PEEK) has excellent mechanical, chemical and thermal properties, which have advantages over other special engineering plastics. The tensile strength and flexural modulus of PEEK at high temperatures are still high, and it shows reliable creep resistance and fatigue resistance and can be used at high temperatures of 200°C for a long time. PEEK gears also enable power transmission under heavier loads and are the top-engineered material in molded gears today.
PEEK gears have excellent performance and have many potential uses in dentistry. PEEK has a low elastic modulus and excellent tensile properties close to human bones and is suitable as a substitute for teeth. However, it is still necessary to explore and analyze the failure of wear, and it is necessary to consider conditions such as load sizes, environmental conditions, and slip rate; carry out a targeted experimental analysis.
Polyphenylene sulfide gears
Polyphenylene sulfide (PPS) has the advantages of good hardness, good dimensional stability, fatigue resistance and chemical resistance. It is the preferred material for gears in high-temperature and corrosive environments. Now PPS gears have been applied to harsh conditions such as automobiles and special fluid pumps. PPS can be combined with other polymers to achieve good mechanical and friction properties, and the wear and transmission performance of gears can also be improved.
Fiber-reinforced plastic gears
Plastic gears have the advantages of lightweight, easy molding, and low noise, but they also have disadvantages such as low strength and poor wear resistance. Therefore, the manufacture of plastic gears requires materials with good performance, which can be achieved by adding different additives to the materials to increase their strength. The additives of plastic gears are generally divided into two categories, one is to reduce friction, and the other is to improve heat resistance and mechanical properties.
The use of polytetrafluoroethylene, graphene and siloxane can reduce the friction during gear meshing; adding carbon fiber and glass fiber can improve the strength and thermal performance of the gear. You can use aromatic polyamide fiber to improve wear resistance and reduce the friction coefficient of the gear. Fiber has the advantages of high tensile strength and good impact energy absorption. It is a simple and effective method to improve the strength of gears, and provides a solid foundation for polymer gears to replace metal gears.
Carbon fiber reinforced plastic gears
Carbon fiber (CF) has high tensile strength and modulus, excellent tensile properties, low density, high thermal stability, and good thermal and electrical conductivity. It has a high degree of free design and can be designed according to requirements. Carbon fiber is widely used in various fields. Adding carbon fiber to plastic gears can improve the friction of the gear due to the rigidity of the carbon fiber. The stability and wear resistance of the gear can be improved based on realizing the lightweight of the gear.
Glass fiber reinforced plastic gears
Because glass fiber (GF) has a small diameter, after being combined with the matrix material, it shows the characteristics of high strength, excellent performance and great freedom in product design. Under certain stress levels and rotational speed conditions, compared with unfilled reinforced gears, GF-filled gears have better strength, modulus and thermal conductivity, and the fatigue life is prolonged. The distribution of the inner fiber of injection molded products is even, and the tensile properties and bending strength are greatly improved. It is widely used in various mechanical parts in the fields of automobile, aerospace and mining.
Aramid fiber-reinforced plastic gears
Aramid fiber is a kind of synthetic fiber, which has the advantages of super high strength, high modulus and lightweight. It does not decompose or melt at high temperatures and is a good insulation and anti-aging material. Aramid fiber-filled gears can reduce the weight of the gears, making the gears develop in the direction of miniaturization and high performance.
PEEK gears
Polyether ether ketone (PEEK) has excellent mechanical, chemical and thermal properties, which have advantages over other special engineering plastics. The tensile strength and flexural modulus of PEEK at high temperatures are still high, and it shows reliable creep resistance and fatigue resistance and can be used at high temperatures of 200°C for a long time. PEEK gears also enable power transmission under heavier loads and are the top-engineered material in molded gears today.
PEEK gears have excellent performance and have many potential uses in dentistry. PEEK has a low elastic modulus and excellent tensile properties close to human bones and is suitable as a substitute for teeth. However, it is still necessary to explore and analyze the failure of wear, and it is necessary to consider conditions such as load sizes, environmental conditions, and slip rate; carry out a targeted experimental analysis.
Polyphenylene sulfide gears
Polyphenylene sulfide (PPS) has the advantages of good hardness, good dimensional stability, fatigue resistance and chemical resistance. It is the preferred material for gears in high-temperature and corrosive environments. Now PPS gears have been applied to harsh conditions such as automobiles and special fluid pumps. PPS can be combined with other polymers to achieve good mechanical and friction properties, and the wear and transmission performance of gears can also be improved.
Fiber-reinforced plastic gears
Plastic gears have the advantages of lightweight, easy molding, and low noise, but they also have disadvantages such as low strength and poor wear resistance. Therefore, the manufacture of plastic gears requires materials with good performance, which can be achieved by adding different additives to the materials to increase their strength. The additives of plastic gears are generally divided into two categories, one is to reduce friction, and the other is to improve heat resistance and mechanical properties.
The use of polytetrafluoroethylene, graphene and siloxane can reduce the friction during gear meshing; adding carbon fiber and glass fiber can improve the strength and thermal performance of the gear. You can use aromatic polyamide fiber to improve wear resistance and reduce the friction coefficient of the gear. Fiber has the advantages of high tensile strength and good impact energy absorption. It is a simple and effective method to improve the strength of gears, and provides a solid foundation for polymer gears to replace metal gears.
Carbon fiber reinforced plastic gears
Carbon fiber (CF) has high tensile strength and modulus, excellent tensile properties, low density, high thermal stability, and good thermal and electrical conductivity. It has a high degree of free design and can be designed according to requirements. Carbon fiber is widely used in various fields. Adding carbon fiber to plastic gears can improve the friction of the gear due to the rigidity of the carbon fiber. The stability and wear resistance of the gear can be improved based on realizing the lightweight of the gear.
Glass fiber reinforced plastic gears
Because glass fiber (GF) has a small diameter, after being combined with the matrix material, it shows the characteristics of high strength, excellent performance and great freedom in product design. Under certain stress levels and rotational speed conditions, compared with unfilled reinforced gears, GF-filled gears have better strength, modulus and thermal conductivity, and the fatigue life is prolonged. The distribution of the inner fiber of injection molded products is even, and the tensile properties and bending strength are greatly improved. It is widely used in various mechanical parts in the fields of automobile, aerospace and mining.
Aramid fiber-reinforced plastic gears
Aramid fiber is a kind of synthetic fiber, which has the advantages of super high strength, high modulus and lightweight. It does not decompose or melt at high temperatures and is a good insulation and anti-aging material. Aramid fiber-filled gears can reduce the weight of the gears, making the gears develop in the direction of miniaturization and high performance.
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