The front and rear ends of the car are equipped with bumpers, which not only have decorative functions, but more importantly, they are safety devices that absorb and alleviate external impacts, protect the body and protect the body and the occupants.
Many years ago, the front and rear bumpers of automobiles were mainly made of metal materials. The U-shaped channel steel was punched out of steel plates with a thickness of more than 3 mm, and the surface treatment was chrome-plated. It was riveted or welded with the frame rails, and compared with the body. The large gap seems to be an additional part that looks very unsightly.
With the development of the automobile industry and the large-scale application of engineering plastics in the automobile industry, automobile bumpers, as an important safety device, have also moved on the road of innovation. At present, the front and rear bumpers of automobiles must not only maintain the original protection function, but also pursue harmony and unity with the body shape, and pursue their own lightweight. The front and rear bumpers of a car are made of plastic, and they are called plastic bumpers.
The outer plate and buffer material are made of plastic, and the cross beam is stamped with a cold-rolled sheet with a thickness of about 1.5 mm to form a U-shaped groove; the outer plate and buffer material are attached to the cross beam, and the cross beam and the frame longitudinal beam can be connected by screws at any time Disassemble it. The plastic used in this plastic bumper is generally made of two types of materials, polyester and polypropylene, and made by injection molding. For example, the bumper of the Peugeot 405 is made of polyester-based materials and made by reaction injection molding. The bumpers of Volkswagen's Audi 100, Golf, Shanghai's Santana, Tianjin's Xiali and other models are made of polypropylene by injection molding. There is also a kind of plastic called polycarbonate series abroad, which is infiltrated into alloy components and adopts the method of alloy injection molding. The processed bumper not only has high strength and rigidity, but also has the advantage of being weldable, and has good coating performance. More and more usage in cars.
The geometric shape of the bumper should not only consider its consistency with the shape of the whole vehicle to ensure aesthetics, but also meet the mechanical characteristics and energy absorption characteristics to ensure shock absorption and relaxation during impact, as shown in following Figure.
The bumper has the functions of safety protection, decoration of the vehicle and improvement of the aerodynamic characteristics of the vehicle. From a safety point of view, the car can play a buffering role when a low-speed collision accident occurs, protecting the front and rear car bodies; it can play a certain role in protecting pedestrians when an accident occurs with a pedestrian. From the appearance point of view, it is decorative and has become an important part of decorating the appearance of a car; at the same time, the car bumper also has a certain aerodynamic effect.
In summary, after understanding the relevant components of car bumpers, we know that car insurance is made of plastic material and uses plastic injection molding. Sunbright Technology has a natural advantage in injection molding, whether it is injection molds or injection parts are your best choice. Welcome to your inquiry.
The link of the plastic injection Auto parts is as below for your reference.