The difference between "sound" and "sound": understood according to the wording,insulation materials refers to the transmission interferes with sound waves, theacoustic transmission decreases. And the sound-absorbing material to absorb sound,the reflected energy reduction.

Sound insulation material requirement is compact without pores or slits. Aluminium alloy forging Fang said because this kind of sound insulation material density,acoustic difficult to and absorbed, the reflective ability, but it has poor sound absorption performance. Such as lead, steel plate, this kind of sound absorbing material is loose and porous material requirements, breathable, because this kind of porous sound-absorbing material, so the sound insulation performance of difference.Such as: glass wool, rock wool sound-absorbing material such as sound absorptionprinciple: when sound waves incident to the surface of the porous material, causes the vibration of air in the pores, due to frictional resistance and air viscous resistance and the effect of heat conduction, a considerable part of the sound energy will be converted into heat energy, thereby sound-absorbing role.

Aluminium alloy forging Fang said car noise mainly includes: shock, sound insulation,sealing, absorbing four links. The main noise of automobile noise from the structure,and for the method of automobile structure noise is the most effective damping is in the communication channels to increase the elastic damping materials, the spread ofisolation or damping vibration, can achieve the purpose of vibration and noise reduction.

Vehicle noise, sound absorption and sound insulation and solves the different goals and priorities, sound-absorbing solves the goal is less weak automobile noise reflection repeatedly in the cab, which weakens the driving reverberation sound,shorten reverberation time. And the sound insulation treatment from the point of origin(engine noise, tire noise) spread to the cab. Low frequency noise is much highersound barrier material effect than using sound-absorbing material to reduceautomobile noise effect.

Sealing is mainly to strengthen the sealing door and the car body door frame,effectively reduce the car speed wind cutting sound, let the air tightness is better in the carriage when the vehicle door is closed, after use can clearly feel the pressure of high-grade car sense of ear. Seal can effectively reduce the overall vehicle noise,aluminium alloy forging Fang remind particularly has good inhibition effect on wind noise in the process of high speed. Vehicles produced during the spoiler is root cause of wind noise for high speed vehicle body -- in the process of a component will appearperiodic flow separation, vortex from the both sides of the vehicle body out, Shun gasflow direction, resulting in noise.

At present car noise has become an important part of the automobile refitting, greatlyinfluences the car comfort and handling, has also become a reference index for the majority of purchase a car race, today's CapitaLand aluminum alloy forging is for everyone to discuss some techniques and advantages of the automobile noise. With the development of sound insulation technology, more insulation materials are applied to the life, production, provide a great convenience to control noise, improve the living environment of residents. Not only for professional use antifreeze antifreeze can not be replaced

The decrease of temperature will bring challenges, on the car engine cooling systemat this time, the car needs antifreeze high quality care to the heart "". However, many owners for the understanding and use of antifreeze misunderstanding, for example,some owners of water or alcohol instead of antifreeze, antifreeze mixed use ofdifferent types of random etc.. These behaviors affect the engine "serious health". Notonly the antifreeze antifreeze

Forging Fang aluminum alloy are introduced in this paper, the antifreeze is a special additive containing coolant, mainly used for the cooling system of engine. The main function of antifreeze is, in the cold winter of parking, prevent the coolant freezes andsplitting the radiator and freezing of engine cylinder body or the cover, and in the summer when the temperature is higher, it can effectively avoid the phenomenon ofanti boiling, boiling.

Some of the owners in order to facilitate, in winter the direct use of alcohol or alcohol instead of antifreeze, and the summer is replaced with water.

Aluminium alloy forging Fang warned, this way can not only cause damage to the car,even will bring security. On the one hand, the low boiling point of alcohol, easy combustion, volatile, high temperature, high pressure situations in the car, very easy to cause the boil, and even cause combustion; on the other hand, long-term use does not contain antiseptic additive alcohol solvent is easy to cause the corrosion, scaling and air resistance phenomenon. And the water will cause corrosion of automotive cooling system of various kinds of metal parts. Choose antifreeze also to prevent counterfeiting

Jiade aluminum alloy forging suggestions, in order to make the car bettermaintenance, had better choose well-known brand products, a well-known brand is aguarantee of high technical content, quality. In addition, the well-known security products in place, to facilitate the identification of true and false, as long as consumers according to the related knowledge to distinguish carefully, can provide good protection for the automobile cooling system.