Why Are Car Bumpers Made of Plastic?
1 Answers
The reasons why car bumpers are made of plastic are: 1. Consideration for pedestrian safety; 2. Practical usage considerations; 3. Facilitation of vehicle design and production. The car bumper is a safety device designed to absorb and mitigate external impacts, protecting the vehicle body and passenger safety. Plastic bumpers are manufactured using polyester and polypropylene materials through injection molding. They consist of an outer panel, cushioning material, and a crossbeam. The outer panel and cushioning material are made of plastic, while the crossbeam is formed by stamping cold-rolled thin steel sheets (approximately 1.5mm thick) into a U-shaped channel. The outer panel and cushioning material are attached to the crossbeam, which is then bolted to the vehicle frame's longitudinal beams, allowing for easy removal when necessary.