Precision injection molding of plastic molds for automotive parts is an improvement and optimization based on the traditional molding process to meet the needs of micro parts manufacturing. This technology mainly uses special precision injection molds and advanced injection equipment to inject materials into the mold cavities under high temperature and pressure, and rapidly cool and solidify them to form micro plastic products with high dimensional accuracy and excellent surface quality. Compared with traditional injection molding, it faces many challenges, such as material fillability. Therefore, continuous innovation and optimization are needed in mold design, process parameter control, and material selection.

In order to manufacture high-precision plastic injection mold for auto parts, advanced machining processes such as electric discharge machining (EDM) and laser machining are widely used, which can achieve small tolerance machining of the mold structure. EDM is suitable for high-hardness mold materials and can manufacture micro mold cavities with complex shapes, while laser processing is suitable for micro drilling and micro cutting operations with non-contact, high precision, and high flexibility.

Optimization of Injection Mold Structure Design

Aiming at the characteristics of automotive interior parts plastic mold, the mold structure design has been optimized in a series. For example, the adoption of a hot runner system can effectively reduce the pressure and heat loss of the plastic melt in the runner, and improve the fluidity and filling performance of the melt. This design is especially important for the molding of miniature parts, which can better ensure that the melt is uniformly filled into the tiny cavities. At the same time, the gate design of the mold is optimized to reduce the impact of gate traces on the appearance and performance of the micro-parts, and to achieve fast gate cut-off, thus improving production efficiency.

Application of High-performance Engineering Plastics

In order to meet the requirements of precision injection molded parts in mechanical properties, heat resistance, and chemical resistance, high-performance engineering plastics in automotive molding applications are increasingly widespread. For example, PEEK and PC and other engineering plastics with high strength, high hardness, high temperature, and corrosion resistance and other excellent performance, suitable for the manufacture of mechanical parts, electronic connectors, and auto interior parts. The molding of these plastics needs to be optimized for its material properties, such as adjusting the injection temperature, pressure, and speed, and other parameters to ensure that the material can be fully melted and filled.

Miniaturization and Lightweighting of Automotive Interior Plastic Parts

With the development of the automotive industry, the miniaturization and lightweighting have become an important way to improve the economy of automobiles. The application of mold injection molding in the car field mainly includes the manufacture of micro sensors and actuators, etc. For example, micro sensors are manufactured through injection molding, with small size, light weight, and other advantages, to meet the high-performance requirements of automotive electronic systems on parts. With the rapid development of electric vehicles and autonomous driving technology, automotive demand for micro parts will continue to increase, mold injection in the automotive field will be more widely used.