Structure and composition

The outer plate and buffer material are made of plastic, and the beam is punched into a U-shaped groove with a cold-rolled plate with a thickness of about 1.5mm; the outer plate and buffer material are fixed on the beam, and the beam is connected to the frame longitudinal beam by screws, which can be disassembled at any time. The plastic used in this auto lamp mould is usually injection moulded from polyester and polypropylene. For example, the bumper of the Peugeot 405 sedan is made of polyester and is reaction injection molded. The bumpers of the Volkswagen Audi 100, Golf, Shanghai Santana and Tianjin Xiali are all injection-molded from polypropylene. There is also a plastic called polycarbonate system abroad, which penetrates into the alloy composition and adopts the method of alloy injection molding. The processed bumper not only has high strength and rigidity, but also has the advantages of welding, and the coating performance is good, and it is used in more and more automobiles.

effect

Bumpers have functions to protect, decorate and improve vehicle aerodynamics. In terms of safety, the vehicle acts as a buffer in a low-speed collision, protecting the front and rear bodies; it can protect pedestrians in the event of an accident. In terms of appearance, it is decorative and has become an important part of car exterior decoration; at the same time, car bumpers also have a certain aerodynamic effect.

At the same time, in order to reduce the injury to the passengers in a side collision accident, a door bumper is usually installed on the car to enhance the anti-collision impact force of the door. The method is simple and practical, and has little change to the body structure, and has been widely used. As early as the Shenzhen International Auto Show in 1993, the Honda Accord opened a part of the door and showed the door bumper to the audience to demonstrate its good safety performance.

auto mould factory The installation of the door bumper is to place several high-strength steel beams horizontally or obliquely on the door panel of each door to play the role of the front and rear bumpers, so that the whole vehicle can be placed on the front, rear, left and right bumpers. Under the "guard", a "copper and iron wall" is formed, so that the passengers in the car have a limited safety area. Of course, installing such a door bumper will undoubtedly add some cost to the automaker, but for the car occupants, the safety and sense of security will increase a lot.