At present, the development of plastic bearing seats abroad is very fast, and their application scope is relatively wide. However, plastic bearing seats are still in their infancy in China and are relatively lacking in terms of raw material production and product application. According to incomplete statistics from relevant parties, in the past five years, the five major engineering plastics commonly used in China, including polycarbonate, polyoxymethylene, polyamide, thermoplastic resin, and modified polyphenylene ether, have maintained a high-speed growth of 30.3% in market demand. However, China's engineering plastics for plastic bearings mainly rely on imports. In recent years, engineering plastic products have been increasingly widely used due to their excellent performance. Engineering plastics have broad application prospects in bearing seats, and plastic bearing seats are becoming increasingly popular among users.

Due to its excellent self-lubricating, wear-resistant, low friction, and special anti bite properties, engineering plastic bearing seats can work normally even under poor lubrication conditions, making them ideal as bearing materials. The main raw material for plastic bearing seats is PBT engineering plastic. Before PBT injection molding, it must be dried at a temperature of 110-120 ℃ for about 3 hours. The molding processing temperature is 250-270 ℃, and the mold temperature should be controlled at 50-75 ℃. As the material solidifies and crystallizes immediately upon cooling from a molten state, its cooling time is relatively short; If the nozzle temperature is not properly controlled (too low), the flow channel (water outlet) is prone to cooling and solidification, leading to nozzle blockage. If the temperature of the barrel exceeds 275 ℃ or the molten material stays in the barrel for more than 30 minutes, it is easy to cause the material to decompose and become brittle. When PBT injection molding, a larger nozzle is required for injection molding, and a hot runner system should not be used. The mold exhaust should be good, and it is recommended to use "high speed, medium pressure, and medium temperature" conditions for molding and processing. Fireproof materials or PBT nozzle materials with added fiberglass should not be recycled. When stopping the machine, PE or PP materials should be used to clean the material pipe in a timely manner to avoid carbonization.