1) Classification of plastic bearings

A. Plastic rolling bearings

B. Plastic sliding bearings

    The friction that occurs when the plastic rolling bearing is working is rolling friction, while the sliding friction that occurs when the plastic sliding bearing is working; the size of the rolling friction mainly depends on the manufacturing accuracy; and the size of the friction of the plastic sliding bearing mainly depends on the material of the sliding surface of the bearing .

Plastic sliding bearings generally have a self-lubricating function on the working surface; 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 continuously extending, from fitness equipment to office equipment and the automotive industry, etc. plastic bearings are used. At present, there is no automobile running on the road that does not use plastic bearings. Plastic sliding bearings have replaced metal bearings and plastic rolling bearings.

  Guangzhou Aote Engineering Plastics Co., Ltd. is a manufacturer of wear-resistant plastic materials and injection molding manufacturers in Guangzhou. Our company specializes in high-performance plastics and engineering plastics injection molding, PEEK injection molding, PEEK plastic parts, PFA injection molding, PPS injection molding, PVDF injection molding, and PSU injection molding.

2) Material of plastic bearing

A. POM plastic bearings, PA plastic bearings

POM and PA materials have good mechanical strength and wear resistance, and are suitable for making more precise plastic bearings. The working temperature is from -60¡ãC to 100¡ãC. The surface strength is high and smooth, and there is basically no tension. It has good self-lubrication. Performance and low coefficient of friction, on the basis of maintaining the traditional advantages of plastic bearings, can be applied to precision and higher speed operation. Among them, POM plastic bearings are the most widely used of all plastic bearings. Generally, the inner and outer ball materials use POM or PA, and the cage uses glass fiber reinforced PA66 (GRPA66-25). The balls are glass balls, stainless steel balls or ceramic balls. This kind of bearing performs well in alkaline environments but is not suitable for operation in acidic corrosive environments.

characteristic:

(1) High rigidity, high hardness, high impact strength even at low temperature;

(2) Excellent elasticity and good creep resistance;

(3) High heat stability and very good dimensional stability;

(4) Good sliding performance and wear resistance;

(5) Physiologically inert, suitable for contact with food.

B. HDPE, PP, UPE materials

It has been proved that it can be used in relatively weak acid-base cross environment (30%Cucl2 solution and 30%NaoH solution test OK), so it is suitable for most acid/alkali/salt/solubility/oil/gas and seawater corrosive environments. It has the oil-free, self-lubricating, anti-magnetic and electrical insulation properties of general plastic bearings, but it has low mechanical strength and is easy to deform. Therefore, this type of acid and alkali resistant plastic bearings are not suitable for larger loads and higher speeds. In order to overcome this type of acid resistance Disadvantages of alkali plastic bearings. In comparison, the use of UPE material has better strength, low friction characteristics and low temperature application characteristics (as low as -150¡æ). Generally, the inner and outer ring materials are HDPE, PP or UPE, and the cage material is HDPE, PP or UPE, the ball is glass ball, stainless steel ball or ceramic ball. In this way, the overall performance of the acid and alkali resistant bearings will be greatly improved.

characteristic:

(1) Good corrosion resistance, resistant to various corrosive media and organic media within a certain temperature and concentration range

(2) High mechanical strength, cutting ability to maintain high toughness at liquid nitrogen temperature (-196¡æ)

(3) Good self-lubrication and high wear resistance

(4) Strong anti-adhesion ability

(5) Very low water absorption, excellent electrical insulation

(6) Good resistance to high-energy radiation

C. PTFE, PI high temperature and corrosion resistant plastic bearings

PTFE and PI, as emerging engineering plastic materials, have been proven to have better mechanical strength, dimensional stability and high temperature resistance among all known engineering plastics. Among them, PTFE has a long-term use temperature of 260¡ãC, and PI has a long-term use temperature of 300¡ãC. And it has excellent corrosion resistance, and it can still operate freely in a medium-strength acid-base corrosive environment. Therefore, it is generally used to make the outer ring material to choose PTFE or PI, and the ball is generally Zro2 or Si3N4 ceramic ball. The disadvantage of bearings that operate precisely in harsh environments is that the cost of use is higher because the materials themselves are more expensive.

3) Application of bearings

1. Automotive industry-low weight, improved fuel efficiency, and reduced carbon dioxide emissions.

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

Due to the non-magnetic properties of thermoplastics, application areas such as bank card readers and document scanners or medical equipment, such as MRI scanners and X-ray machines.

3. Food and poultry processing industry.

4. Underwater applications--plastic bearings can be developed with different inertia levels and can achieve low torque 0.041Nmm. The use of plastic bearings has low water absorption and self-cleaning functions to make spa machines, pool cleaners and dishwashers.

Guangzhou Aote Engineering Plastics Co., Ltd. is a manufacturer of wear-resistant plastic materials and injection molding in Guangzhou. Our company focuses on high-performance plastics and engineering plastics injection molding, PEEK injection molding, PEEK plastic parts, PFA injection molding, PPS injection molding, PVDF injection molding, PSU injection molding.