Sound-absorbing, damping, and shock-absorbing component for automobiles, its preparation method and application

Abstract

The invention discloses an automotive acoustic damping component and a production method and application thereof. The automotive acoustic damping component comprises an isolation anti-sticking layer, a glue damping layer, a flame-retardant acoustic cotton layer, and a porous acoustic film covering layer. The production method includes: selecting flame-retardant acoustic cotton, feeding, die-cutting the flame-retardant acoustic cotton in shape according to the shape of an automobile part, covering the die-cut flame-retardant acoustic cotton layer with porous acoustic film, hot-pressing and sealing the porous acoustic film layer into a die-cut part, punching and quilting the die-cut part, coating joint faces of the die-cut part and the automobile part with glue, and finally combining with the isolation anti-sticking layer. The automotive acoustic damping component applied to automobile bodies, automobile trunks and automobile engine covers has the advantages that when an automobile runs, vibration energy can be absorbed and running noise of the automobile can also be absorbed; the automobile is more comfortable for passengers, driving noise fatigue is reduced, traffic accidents are decreased, and automobile interior air odor pollution is never caused.

Description

technical field [0001] The invention relates to the field of sound-absorbing, damping and vibration-damping components, in particular to a sound-absorbing, damping and vibration-damping component of an automobile, a preparation method and application thereof. Background technique [0002] Most of the car noise is introduced by the vibration of the car sound. All cars are equipped with damping sheets. The damping sheet is a viscoelastic material attached to the inner surface of the car body. It is close to the steel plate wall of the car body. It plays the role of reducing noise and vibration, that is to say, it plays a damping role. In countries with developed automobile industries such as Europe and the United States, polymer resin materials or rubber materials are generally used as raw materials for automobile damping sheets, supplemented by partially modified special high-damping materials, and mixed with appropriate amount of fillers, softeners, anti-aging agents, etc. ...

AI Technical Summary

Problems solved by technology

[0003] In March 2013, the CCTV quality report program exposed that the three major luxury car brands used asphalt dampers, which caused serious air pollution in the car

The damping sheets of these vehicles all contain No. 70 asphalt components, and the price of the damping sheets containing asphalt components is about one-third of that of resin and rubber; On the one hand, there are no relevant national standards on auto parts and auxiliary materials in my country. On the other hand, the use of asphalt can reduce the production cost of enterprises; The phenomenon of the damping plate

[0004] Automobile parts use No. 70 asphalt component damping sheet bonded felt as sound insulation and damping material. Because the sound insulation effect is not obvious, and it causes odor pollution in the car indoor air; therefore, external noise, mechanical vibration noise, and tire friction can be clearly felt in the cab. The noise and the wind-cut sound caused by the friction between the sound of the car and the air make the driver and passengers in the car prone to sleepiness and affect their health. The odor and noise pollution in the car interior lead to frequent traffic accidents

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