From the safety point of view, the car bumper can play a buffer role in the event of a low-speed collision accident to protect the front and rear body; from the appearance point of view, it is decorative and becomes an important part of decorating the appearance of the car; Certain aerodynamic effects. The advantages of plastic bumpers are:
Control manufacturing cost and reduce weight
It is undeniable that the original intention of using plastic materials for automobile bumpers is to save costs. Plastic bumpers can not only save manufacturing costs, but are also relatively easy to produce. After the cost of car manufacturing is controlled, the price of the final product to consumers will be more reasonable.
Modern automobile production has been modularized. In addition to the high-strength materials used for the body, many components will be made of materials that are lightweight, corrosion-resistant, easy to process, easy to shape, and easy to repair and replace. It is reported that for every 100kg reduction in the weight of a traditional fuel vehicle, the fuel consumption per 100 kilometers will be reduced by 0.3-0.6L, and the CO2 emission will be reduced by 5-8g.
In addition to the front and rear bumpers of the car, some exterior parts of the body, such as fenders, may also be made of lightweight materials such as plastic. Of course, some top sports cars will also use a large amount of carbon fiber materials to replace metal materials on the body. The purpose is simple: the body is lighter, the braking is faster and safer, and it is more fuel-efficient.
Transformation of the bumper to protect pedestrians
Vehicle safety is absolutely not borne by the bumper alone, but mainly depends on the frame structure of the body. Therefore, apart from its manufacturing cost, the protection of pedestrians is also one of the factors for its use of plastic materials. After all, a vehicle cannot only guarantee its own safety. As a strong one, protecting pedestrians is also one of the factors to be considered for vehicle safety.
If the same car was driving at the same low speed, it hit a pedestrian head-on. Imagine, if you were the one who got hit, would you wish that bumper was metal or plastic?
Due to its material, plastic bumpers are more elastic than metal and can better absorb impact energy. If a vehicle collides with a pedestrian, it is very important for people's cushioning and elastic protection. If the bumper is replaced with metal, then the tragedy is likely to be pedestrians.
Self-healing ability for minor collisions
In the event of a slight collision, the plastic bumper has good elasticity and has a certain impact resistance. That is to say, if there is a small bump, the plastic bumper can automatically rebound and repair itself. In the past, some Japanese models even used these functions as selling points. For example: the bumper did not damage the car paint after the collision, but there was a small dent, and after a certain period of high-temperature sunlight, some bumpers can be repaired and restored by themselves, etc.
Even if the paint is scratched or rubbed off, the cost of painting a plastic bumper will be much cheaper than a metal bumper repaired by sheet metal!
The anti-corrosion effect of the plastic bumper is better
We all know that metals are prone to rust when combined with water and air, which not only affects the appearance, but also poses certain safety hazards. Car bumpers are parts that are relatively prone to collisions. If a metal bumper is used, once the car paint is knocked off in a collision, the injured area must be treated immediately. If it takes a long time, an oxidation reaction will occur, endangering the adjacent vehicles paint and bumper metal. The plastic bumper is different, because it has good corrosion resistance, we don't need to worry about it.
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