What is the function of the rear bumper of a car
Bumpers serve functions such as safety protection, vehicle decoration, and improvement of the vehicle's aerodynamic characteristics. From a safety perspective, when a car is involved in a low-speed collision accident, it can act as a buffer to protect the front and rear vehicle bodies. It can play a certain role in protecting pedestrians when an accident occurs with them. From the perspective of appearance, it is decorative and has become an important component for decorating the exterior of a car. At the same time, car bumpers also have a certain aerodynamic effect.
At the same time, in order to reduce the harm to passengers in the event of a side collision, car doors are usually equipped with door bumpers to enhance the anti-collision impact force of the doors. This method is practical and simple, causing little change to the vehicle body structure, and has been widely promoted and used. As early as the 1993 Shenzhen International Auto Show, the Honda Accord on display had a part of its door cut open to specifically expose the door bumper to the audience, demonstrating its excellent safety performance.
Installing door bumpers involves placing several high-strength steel beams horizontally or diagonally within each door panel, serving as the front and rear bumpers of the vehicle. This ensures that the entire car is protected by bumpers at the front, back, left and right, forming an "impregnable wall" and providing the occupants with the maximum safety zone. Of course, installing such door bumpers will undoubtedly increase some costs for car manufacturers, but for the occupants of the car, it will greatly enhance safety and a sense of security.
The repair method for the dent on the rear bumper of a car mainly relies on the thermal expansion and contraction characteristics of its plastic material. Youdaoplaceholder0 can be achieved by heating and softening it and then pushing it out, or by using professional tools to pull . The specific method should be selected according to the degree and location of the dent.
Repair principle and applicable conditions
The rear bumpers are mostly made of specially formulated plastic materials. After softening when heated, they can be restored to their original shape by external force and set after cooling. This method is applicable to minor to moderate dents in the car paint that are intact and undamaged. If the dent is located on the car rib or accompanied by severe scratches or cracks, professional repair is required.
Common repair methods
Youdaoplaceholder0 hot water restoration method .
Slowly pour boiling water over the indentation for about 5 minutes. Once the plastic softens, use your hand or a tool (such as a toilet suction cup) to push out the indentation from the outside or inside.
Cool it immediately with cold water to make the plastic shrink and set.
Youdaoplaceholder0 hot air heating method .
Use the hot air setting of a hair dryer to heat the concave area for about 20 minutes. After it softens, manually push it out.
It can be used in combination with dry ice to cover aluminum foil, taking advantage of the temperature difference to accelerate recovery.
Youdaoplaceholder0 professional tools repair .
Suction cup puller: Suitable for small shallow depressions, it slowly pulls out through vacuum adsorption force.
Hot melt adhesive puller: Apply hot melt adhesive to the concave area where the gasket adheres, gradually apply force with the puller, and finally clean it with a glue remover.
Dent repair pen: For minor dents, fill the repair glue and then grind it smooth.
Youdaoplaceholder0 manual ejection method .
Remove some of the bumper screws, reach in and gently press the concave area from the back. This is suitable for small deformations.
Precautions for Operation
The heating temperature needs to be controlled to avoid deformation or charring of the plastic due to being too high.
The force applied by the pulling tool should be uniform and slow to prevent the bumper from cracking.
If there are scratches after repair, grinding, repainting or replacement of parts are required.
For large areas or deep depressions, it is recommended to use a professional plastic welding machine or entrust it to a repair shop for handling.
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