Structural composition
The outer plate and buffer material are made of plastic, and the cross beam is stamped into a U-shaped groove with a cold-rolled sheet with a thickness of about 1.5mm; The outer plate and buffer material are attached to the cross beam, which is connected with the frame longitudinal beam by screws and can be removed at any time. The plastic used in this plastic bumper is generally made of polyester and polypropylene by injection molding. For example, the bumper of Peugeot 405 car is made of polyester materials and made by reaction injection molding. The bumpers of Volkswagen's Audi 100, golf, Santana in Shanghai and Xiali in Tianjin are made of polypropylene materials by injection molding. There is also a kind of plastic called polycarbonate system abroad, which infiltrates alloy components and adopts the method of alloy injection molding. The processed bumper not only has high-strength rigidity, but also has the advantages of welding, but also has good coating performance, and is used more and more on cars.
The geometry of the bumper shall not only be consistent with the shape of the whole vehicle to ensure beauty, but also comply with the mechanical characteristics and energy absorption characteristics to ensure vibration absorption and cushioning during impact.
