HS code compliance in cross-border rail freight

* Automobile engine sound insulation cotton (analysis of automobile engine noise isolation technology) Judging from the history of automobile development,HS code compliance in cross-border rail freight with the continuous emergence of new energy and new technology, various performance of automobiles is also constantly improving. But one of the problems that follows is noise pollution. In particular, the noise of car engines brings a great psychological burden to people in urban traffic. Therefore, car soundproofing technology has become a necessary safety equipment. Noise is an extremely annoying experience when driving a car. When you want to drive quietly, you have to bear all kinds of noises such as road noise and vehicle engine noise. Among these sounds, vehicle engine noise is one of the biggest sources. In order to avoid this kind of problemNow, the current automobile sound insulation technology has begun to be continuously upgraded, among which automobile engine soundproofing cotton is a good example. So, what exactly is the car engine soundproofing cotton? What's the function? Next, let's take a brief analysis. I. What is car engine soundproofing cotton? Car engine soundproofing cotton, as the name implies, is a kind of item used for soundproofing, which is usually used to isolate the source part of vehicle engine noise, so as to prevent noise from being transmitted to the interior of the car. In addition, car engine soundproofing cotton can also help alleviate the vibration and interference of the vehicle engine. It is a thin and soft fiber material used to wrap, cover or fill coils to reduce the penetration and support of sound. II. The function of car engine soundproofing cotton 1. Noise control: in particular, soundproof cotton with strong sound absorption effect can effectivelyPrevent engine noise - such as easing the sound of the throat of the vehicle's engine or the slight vibration of the engine - from generating from the source, and prevent them from being transmitted to the car through the hood. This can make the driver and passengers feel a more comfortable and quiet driving experience, and also effectively reduce the noise interference of the surrounding environment. Two. Reduce vibration: Through the viscosity and elastic recovery during friction, soundproof cotton can reduce the vibration generated by the vehicle engine during operation. This can not only reduce the load of the engine and extend its service life, but also improve the smoothness and stability of the vehicle, and reduce the vibration of the vehicle during driving, making the ride more comfortable. 3. Improve engine efficiency: The soundproof cotton attached to the engine can also effectively reduce the reflection of engine noise.And resonance, so as to reduce the false interaction and stumbling of the engine, and improve the output power and efficiency of the engine. III. Types of automobile engine soundproofing cotton At present, the common types of engine soundproofing cotton on the market mainly include: 1. Polymer foam materials: Polymer foam materials have good durability and sound absorption performance, and the price is relatively high. It is suitable for models that require long-term performance. Two. Sieve sound-absorbing material: This material has a simple process, low cost, can be made into various shapes, good sound-absorbing function, and can better isolate engine noise. 3. Condensing glass fiber: The sound absorption performance of glass fiber is also very good, which is suitable for flexible vibration isolation pads, air filter packaging, plastic deformable parts and carpets in automobile production. IV. Conclusion As one of the widely used soundproofing materials at present, the practical performance of automobile engine soundproofing cotton has been widely recognized.The wide application of engine soundproofing cotton can not only effectively prevent noise pollution and improve the driving environment, but also improve driving quality, further meet the needs of consumers, and help protect the human ecological environment.

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