The design concept of the car bumper includes meeting regulatory requirements for collision performance (2.5MPH BUMPER, ECE R42), pedestrian protection (EEC70/156), and external protrusions (ECE R26.01, EEC79/488). It also needs to meet the effective air intake area of the cooling system, conform to styling requirements, ensure a smooth and harmonious overall appearance, and adhere to the principles of low cost, light weight, material recyclability, process feasibility, and ease of assembly and disassembly.
The core considerations for using plastic for the outer panel include pedestrian protection, automatic rebound, lightweight, and corrosion resistance.
Plastic bumpers generally use polyester and polypropylene materials and are manufactured using injection molding. Modern car bumpers are typically made of plastic or fiberglass through injection molding. Autoclave manufacturing can be used; compression molding can be chosen to improve production speed.
The bumper assembly is installed using bolts to ensure a precise fit with the car body. This assembly is a universal part that requires no additional processing or customization and can directly replace original vehicle parts, reducing maintenance costs and time. The rear bumper assembly includes the rear bumper body, mounting parts, and flexible clip-on connectors.