1. The storage boxes on car door panels mostly use high-performance plastics, such as polypropylene (PP), acrylonitrile - butadiene - styrene copolymer (ABS), etc. These plastics have good toughness, strength, and weather resistance. They can withstand external forces like opening and closing in daily use and the squeezing of items. Also, they can maintain stable performance in different temperature and humidity environments, and are not prone to deformation or cracking. At the same time, the storage boxes of some high - end car models will have special treatments on the plastic surface, such as flocking, to improve the softness and high - end feel of the touch, reduce the noise when placing items, and optimize the driving and riding experience. In terms of the installation method, it is usually integrated with the interior panel of the car door. It is connected to the main body of the door panel through structures such as snaps and slots. The installation is firm and convenient for disassembly and maintenance, ensuring that there will be no abnormal noise due to factors such as vibration during vehicle driving, and maintaining a quiet environment inside the car.

2. The vibration friction welding technology has strong adaptability to car door panel storage boxes of different shapes and sizes. Whether it is a regular rectangular storage box or a design with unique shapes and complex curved surfaces, high - quality welding can be achieved by accurately adjusting the welding parameters. This provides strong technical support for the diversified design and manufacturing of car door panel storage boxes, and promotes the manufacturing process of automotive interior parts to continuously move towards refinement and high - quality.