Car plastic Injection mould is generally engineering plastics.

　　Engineering plastics can be used as engineering materials and plastics that replace metal to manufacture machine parts. Engineering plastics have excellent comprehensive properties, high rigidity, small creep, high mechanical strength, good heat resistance, and good electrical insulation. They can be used for a long time in harsh chemical and physical environments and can be used as engineering structural materials instead of metals. , but the price is more expensive and the output is smaller.

　　Engineering plastics can be divided into general engineering plastics and special engineering plastics. The former main varieties are polyamide, polycarbonate, polyoxymethylene, modified polyphenylene ether, and thermoplastic polyester five general engineering plastics; the latter mainly refers to engineering plastics with heat resistance above 150 ℃, the main varieties are polyimide, polyphenylene sulfide, polysulfone, aromatic polyamide, polyacrylate, polyphenylene, polyaryletherketone, liquid crystal polymer, and fluororesin, etc.

　　(1) Application in the peripheral parts of automobile engines Since the peripheral parts of the engine are mainly heating and vibrating parts, most of the materials used in the parts are glass fiber reinforced nylon. This is because nylon has better comprehensive properties. The main properties of nylon modified with glass fiber are greatly improved, such as strength, product accuracy, and dimensional stability.

　　In addition, nylon has many varieties, it is easier to recycle and reuse, and the price is relatively cheap. These factors make nylon an ideal material for engine peripheral parts. The intake manifold is a typical application of modified nylon in automobiles. In 1990, BMW Motor Company of Germany first applied an intake manifold made of glass fiber reinforced nylon to a six-cylinder engine; In cooperation with DuPont, the intake manifold made of glass fiber reinforced PA66 is used in the V6 engine. In the future, major automobile companies in the world have followed suit, and the modified nylon intake manifold has been widely used.

　　(2) Application in automobile engine parts. The engine cover, engine decorative cover, cylinder head cover, and other components are generally made of modified nylon. Compared with metal materials, the quality of the cylinder head cover is reduced by 50% and the cost is reduced by 30%. In addition to engine parts, reinforced nylon can also be used in other stressed parts of the car, such as oil filters, wipers, radiator grilles, etc.