How to achieve thin-walled automotive plastic parts bumpers?

The car bumper is one of the larger trims on the car. It has three main functions: safety, functionality and decoration.​​
There are three main ways to reduce the weight of automobile bumpers: material lightweight, structural optimization design and manufacturing process innovation. Lightweight materials generally refer to replacing the original materials with materials with lower density under certain conditions, such as replacing steel with plastic; the structural optimization design of lightweight bumpers mainly includes thin-wall technology; new manufacturing processes include micro-foaming materials and new technologies such as gas-assisted molding.​​
Plastic bumper material selection
Because of its light weight, good performance, simple manufacturing, corrosion resistance, impact resistance, and relatively large design freedom, plastics are widely used in the automotive industry, and they account for an increasing proportion of automotive materials. The amount of plastic used in a car has become one of the criteria to measure the development level of a country's automobile industry. At present, the plastic used in the production of a car in developed countries has reached 200kg, accounting for about 20% of the mass of the whole vehicle.​​
The application of plastics in my country's automobile industry is relatively late. The amount of plastics used in economical cars is only 50~60kg, that of middle and high-end cars is 60~80kg, and some cars can reach 100kg. Use about 50kg of plastic. The amount of plastic in each car only accounts for 5% to 10% of the weight of the car.
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