Most popular in the world, fully implement automob

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Plastic is popular all over the world, and the full implementation of automobile lightweight

many parts on automobiles, such as bumpers, wheel covers, license plates, instrument panels, door panels, knobs, and even engine covers and air intake systems, all use plastic as raw materials. With the strengthening of the requirements for energy conservation, emission reduction and safety performance, the lightweight design of vehicles has long been common, and the importance of "replacing steel with plastic" has been reflected incisively and vividly

how to realize the lightweight of automobile

for the lightweight of automobile, we mainly start from four aspects: automobile design, improving manufacturing technology, improving the strength of existing materials, and using lightweight materials to replace existing materials. Using lightweight materials to replace existing materials is the main direction of development at present

the specific gravity of general plastics is 0 6. The specific gravity of glass fiber reinforced composites is less than 2.0, and the tensile force is limited to 200 Newton, which is enough, while the A3 steel is 7.6, the brass is 8.4, and the aluminum is 2.7. Therefore, although the strength of plastics is not as good as carbon fiber and metal materials, the lightweight effect of plastics is the best in terms of specific gravity. In addition, the use of plastic can reduce the weight of auto parts by about 40%, but the power, comfort and safety of cars can be improved. In the future, its innovative dynamic force sensor application may overturn traditional cars

common automotive plastic parts

in terms of material types:

polyamide (PA) materials are mainly used in power, chassis parts and structural parts, accounting for about 20% of the whole vehicle plastic

polycarbonate, POM, modified polyphenylene oxide, thermoplastic polyester and other materials are mainly used in electronic and electrical components and structural parts, accounting for about 15% of the plastic of the whole vehicle

modified polyphenylene oxide (MPPO), ABS engineering plastics and their alloy materials are mainly used in interior and exterior decoration parts. With the improvement of vehicle model grade, the application of engineering plastics increases, and the application proportion of ABS and its alloy increases

long glass fiber reinforced composite materials can be used to replace metal exterior decorations to reduce the impact of external objects (including pedestrians) on the body

automobile lightweight application examples

automobile bumper

in our daily life now, 5. For the automobile with C, D, e-belts, it is assumed that non-standard samples should be made. The front and rear bumpers are only a part of the bumpers in the real sense. Taking the previous bumpers as an example, the real bumper is composed of plastic bumper shell, front anti-collision beam, left and right energy absorption boxes, and other installation parts. Among them, The plastic bumper shell is what we often call the front bumper. So, using plastic materials in such an important position is by no means the so-called cutting corners

the position of the front and rear bumpers is the position with the highest collision and scratch probability, and the elasticity of the plastic parts can prevent the bumpers from cracking when they are not seriously impacted, and the bumped bumps can recover by themselves. The metal ones cannot be recovered by themselves and must be made of sheet metal. If it is scraped, the plastic will not rust after the paint falls off. In addition, it can also protect pedestrians. If the bumper is made of high-strength materials, it will cause serious injury to people, while the relative impact of plastic will be much smaller

common materials of bumper at present, the commonly used polymer bumper is composed of three layers: PP, pe/abs and pc/pbt are used as panel materials; The skeleton material is wood and metal; PP foaming material or PU foaming material is used in the middle

at present, toughened (modified) polypropylene (PP) is the most commonly used material in China, and polyurethane (PU) is internationally recognized as the most suitable raw material for the manufacture of automobile bumper, such as BMW, Mercedes Benz, Toyota, Honda and other major automobile manufacturers choose this material to manufacture bumper

engine hood

at present, there are three kinds of reinforced plastics applied to engine hood cover: glass fiber reinforced nylon (gf-pa), long glass fiber reinforced polypropylene (lft-pp) and mineral reinforced polypropylene (m-pp)

gf-pa has excellent high temperature resistance, aging resistance and good mechanical properties, but high performance is accompanied by high cost, which is suitable for high-end automotive products

lft-pp material also has good mechanical properties. At the same time, the production process is simple and the cost is low, which is suitable for middle-end automotive products

m-pp material is more suitable for small displacement automotive products with low temperature requirements

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