1) Classification of plastic bearings

A. Plastic roller bearings

B. Plastic sliding bearings

The friction generated when the plastic roller bearing is working is rolling friction, while the friction generated when the plastic sliding bearing is working is rolling friction; the size of the rolling friction mainly depends on the manufacturing precision; and the size of the friction of the plastic sliding bearing depends entirely on the material of the rolling bearing shear failure.

Plastic sliding bearings generally have self-lubricating bearings on their working surfaces; plastic sliding bearings are generally made of engineering plastics with better performance; because plastic sliding bearings have many advantages over metal sliding bearings. The use of plastic bearings is also constantly expanding, from sports equipment to office supplies and the automotive industry. Plastic rolling bearings are used in all kinds of cars on the road. Plastic sliding bearings have already replaced metal bearings and plastic roller bearings.

2) Plastic rolling bearing material

A.POM plastic rolling bearings, PA plastic rolling bearings

POM and PA raw materials have good impact toughness and wear resistance, suitable for making more precise plastic rolling bearings, operating temperature ranges from -60¡æ to 100¡æ, the surface is strong and smooth, and basically no support force will be generated. Its good self-lubricating bearing performance and low friction resistance can be used for high-precision and high-speed rotation while maintaining the traditional advantages of plastic rolling bearings. Among them, POM plastic rolling bearings are the most widely used of all plastic rolling bearings. Generally, the inner and outer ball materials are POM or PA, and the ball bearings are made of glass fiber reinforced PA66 (GRPA66-25). The steel balls are glass marbles, stainless steel balls or ceramic balls. This type of rolling bearing performs well in alkaline environments but is not suitable for operation in acidic corrosive media.

characteristic:

(1) High stiffness, high hardness, and high impact strength even at low temperatures;

(2) Excellent elasticity and good creep resistance;

(3) High high temperature reliability and particularly good heat resistance;

(4) Good rolling performance and wear resistance;

(5) Physiological plasticity, suitable for contact with food.

B. HDPE, PP, UPE raw materials

It has been proven that it can be used in relatively weak strong acid and strong alkali cross-type natural environment (30% CuCl2 aqueous solution and 30% NaoH aqueous solution test OK), so it is suitable for most acid/alkali/salt/solvent/oil/gas and seawater corrosive natural environment. It has the properties of oil-free self-lubricating bearings, anti-magnetic insulation and other properties of ordinary plastic rolling bearings, but the mechanical strength is low and it is easy to be damaged. Therefore, this type of acid and alkali resistant plastic rolling bearing is not suitable for large loads and high-speed rotation. In order to overcome the defects of this type of acid and alkali resistant plastic bearings. In contrast, the use of UPE material has better compressive strength, low friction properties and ultra-low temperature application properties (at least -150¡æ). Generally, the inner and outer ring materials are HDPE, PP or UPE, the ball bearing materials are HDPE, PP or UPE, and the steel balls are glass marbles, stainless steel balls or ceramic balls. In this way, the comprehensive performance of acid and alkali resistant rolling bearings will be greatly improved.

characteristic:

(1) Good corrosion resistance, can resist various corrosive substances and organic chemicals within a certain temperature and concentration range

(2) High mechanical strength, can maintain high wear resistance under nitrogen density (-196¡æ)

(3) Good self-lubrication and high wear resistance

(4) Strong anti-adhesion ability

(5) Very low water absorption capacity, excellent insulation

(6) Excellent resistance to high-efficiency energy radiation sources

C.PTFE, PI heat-resistant and corrosion-resistant plastic rolling bearings

As new engineering plastic raw materials, PTFE and PI have been proven to have the best impact toughness and heat resistance among all known engineering plastics. Among them, the long-term use temperature of PTFE reaches 260¡æ, and the long-term use temperature of PI reaches 300¡æ. In addition, it has good corrosion resistance and can still operate freely in medium-strength strong acid and alkali corrosive media. Therefore, it is generally used to make PTFE or PI as the outer material, and the steel ball is generally Zro2 or Si3N4 ceramic ball. The disadvantage of rolling bearings that run with high precision in harsh environments is that they are relatively expensive, so the application cost is relatively high. Guangzhou Aote Engineering Plastics Co., Ltd. is a plastic company in Guangzhou. Our company has excellent PTFE and PI injection molding technology.

3) Bearing application

1. Automobile manufacturing industry - low net weight, improved fuel efficiency and reduced carbon dioxide emissions.

2. Commercial service machinery and equipment, mechanical and electrical engineering, fitness equipment, furniture and decoration and building materials.

Because thermosetting plastics are non-magnetic, their main uses include bank card readers and document scanners or medical equipment, such as MRI scanners and X-ray machines.

3. Food and livestock manufacturing industry.

4. Use in water - plastic rolling bearings can be developed with different inertia levels and can also achieve a low torque of 0.041Nmm. Plastic rolling bearings have low water absorption capacity and self-cleaning function and are used to manufacture spas, swimming pool cleaning equipment and sink dishwashers.

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