Car plastic injection mould can be roughly divided into functional parts and structural parts according to their main purpose.

　　Functional parts are independent parts that use some special physical and chemical properties of materials, such as plastic oil-impregnated bearings.

　　Structural parts are covering parts, mounting parts, shells, beams, etc. that work with the mechanical properties of the applied materials.

　　However, this division is also relative, often taking into account the two or taking one of them as the mainstay. Functional parts or functional parts usually meet certain structural requirements based on ensuring the required physical and chemical properties, such as plastic hinges, plastic leaf springs, etc. On the premise of ensuring certain mechanical properties, structural parts must also meet the necessary physical performance requirements. For example, the bumper of a car has to withstand the impact of the vehicle on the concrete wall at a speed of 8km/h. It also has good weather resistance; the overall plastic instrument panel has a large load due to the installation of many internal and external parts (automotive instruments, etc.) on it. It becomes smaller, and it also has to withstand the impact of a spherical pendulum with a diameter of 165mm and a mass of 6.8kg at a speed of 25km/h, absorbing enough energy without being damaged; Nantong injection molding processing is also like an engine cooling fan, which is baked and heated at high temperature. Under a strong earthquake, the blade root has to bear the pulling force formed by the huge centrifugal force of 6000r/min.

　　In short. Although the functional requirements of each structural part are very different, it must be able to put forward the basic thermal and mechanical performance indicators that the polymer material must meet and can reflect the material properties of the component. With the development of the plastics industry, the emergence of various new resins and various high-performance materials obtained by alloying, blending, compounding, and other modification methods are bound to meet the requirements of the automotive industry for functional plastic parts and structural plastic parts and their The various comprehensive performance index requirements put forward by the materials used will gradually expand the application scope of plastics in automobiles.