CN2847455Y - Composite acoustic material - Google Patents
Composite acoustic material Download PDFInfo
- Publication number
- CN2847455Y CN2847455Y CN 200520126147 CN200520126147U CN2847455Y CN 2847455 Y CN2847455 Y CN 2847455Y CN 200520126147 CN200520126147 CN 200520126147 CN 200520126147 U CN200520126147 U CN 200520126147U CN 2847455 Y CN2847455 Y CN 2847455Y
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Abstract
The utility model relates to an acoustic material, particularly a composite acoustic material used for controlling vehicle acceleration noise. The composite acoustic material is characterized in that the utility model comprises three layers, wherein an innermost layer is black non-woven cloth with fire retardant action, a middle layer is a mixed layer with good sound absorption effect and an outermost layer is hard rubber which has iris action to the sound. The utility model has good sound absorption, sound insulation and sealing function to outside vehicle acceleration noise in wide noise frequency band range of engines; therefore, the performance is stable and reliable in long term. The utility model has the characteristics of relatively lighter weight, no pollution of environmental protection, medium performance price ratio, difficult combustion generation, simple construction, etc.
Description
(1) technical field under
The utility model relates to a kind of acoustical material, particularly a kind of compound acoustical material that is used to control the vehicle acceleration noise.
(2) background technology
From the nineties China accession to the WTO, domestic automobile industry has had development at full speed, and the recoverable amount of automobile also rapidly rises, and air pollution that causes thus and the noise problem that disturbs residents has also caused the great attention of government.And issued GB1495-2002 " automobile give it the gun pass-by noise limit value and measuring method " compulsory standard, and formally implement in October, 2002 in January, 2002.
The announcement of this standard and enforcement, what changed China's existence in the past controls not tight problem to the car load noise emitted by accelerating motor vehicle.Because of before 2002, all vehicles are not taked the measure of any control noise emitted by accelerating motor vehicle substantially, though country formulated and issued GB1495-1979 " motor vehicles permission noise " and GB/T 1496-1979 " motor vehicles noise measuring method " in 1979, situation about carrying out is not very desirable.It is higher that one of reason is exactly the noise level limit of stipulating in the standard, and new vehicle need not taken measures just can be up to standard; It is less that Another reason is exactly domestic at that time vehicle population, and its influence to the people is not very big, thus neither be very tight to the detection control of noise, there is not special bodies and agencies that the car load noise is detected and supervises substantially.But among the revised GB1495 of in January, 2002 promulgation, noise emitted by accelerating motor vehicle limit value, noise measuring method, measurement place and implementation date to various vehicles have all been made clear and definite regulation, and come into effect the noise level limit of subordinate phase from January, 2005, the noise limit in this stage requires to compare with standard in 1979, on requiring, improved a lot, if do not take the noise control measure of being correlated with, may not reach the requirement of new standard.
So, before 2002, though the acoustic absorbant that is applied on the vehicle has many types, as sponge, asphalt plank, oil (glass) cellucotton, compound substance etc., basically all be to use in pilothouse, seldom have to be fit to be installed in the pilothouse outside and to be used for controlling noise emitted by accelerating motor vehicle and the good special-purpose acoustic absorbant of effect.
(3) summary of the invention
The utility model is in order to remedy the deficiencies in the prior art, a kind of compound acoustical material is provided, this compound acoustical material has good sound-absorbing, sound insulation and sealing function to noise emitted by accelerating motor vehicle in wide engine noise frequency band range, and its performance is steady in a long-term reliable.
The utility model is achieved by the following technical solution:
A kind of compound acoustical material, its special character is: comprise three-decker, innermost layer is that the black with fire retardation does not have fat cloth, and the middle layer is the good mixolimnion of sound-absorbing effect, and outermost layer is the rubberite that sound is had iris action.
Described mixolimnion is the mixture of the cotton felt of polyester one viscose rayon.
Described three-decker die forming; the major advantage of cotton products is that the fiber tearing performance is good; after materials processing is shaped like this; visible structure is compressed into rigidity, border seal along periphery; the intensity of itself is very big; do not need to increase in addition protective device, support can directly be fixed on the formed product again, and can not make the product distortion.
After noise that engine sends arrives this acoustic damping materials, energy in the noise at first sponges portion of energy through sound absorbing layer, unabsorbed energy can see through sound absorbing layer and arrive the rubber pugging, remove that very little part energy is absorbed by pugging and transmission after, most of energy is reflected to again in the sound absorbing layer of material, like this through repeatedly absorbing and reflecting, energy in the noise just has very big decay, portion of energy after the noise transmission has the part decay again when propagating in air, so engine noise is through after absorption and isolating, can well be controlled, and can outwards not propagate a lot.
Can select the density and the thickness in middle layer according to the noise spectrum of engine, this material well absorbs and the partition effect radiated noise tool in wide frequency band range of engine.If some of vehicle is local as pilothouse need are heat insulation down, between mixed material layer and rubber layer, add a thermofin again, just can play due effect as aluminium foil etc.
The utility model has good sound-absorbing, sound insulation and sealing function to noise emitted by accelerating motor vehicle in wide engine noise frequency band range; Because of being compression molding, so can guarantee shape, its performance can guarantee steady in a long-term reliable; Again because of middle mixed material layer accounts for principal ingredient, fire-retardant black do not have fat cloth and rubber layer thinner, characteristics such as weight is relatively light so it has, environmental protection is not polluted and cost performance is moderate; In addition, it also has characteristics such as nonflammable, that construction is simple.
(4) description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Accompanying drawing is a structural representation of the present utility model.
Among the figure, 1 black does not have fat cloth, 2 mixolimnions, 3 rubberite.
(5) embodiment
Accompanying drawing is a kind of specific embodiment of the present utility model.This embodiment comprises three-decker, and innermost layer is that the black with fire retardation does not have fat cloth 1, and the middle layer is the good mixolimnion of sound-absorbing effect 2, and outermost layer is the rubberite 3 that sound is had iris action.Its manufacturing process is as follows: at first that the mold heated of product is certain temperature, then the potpourri of the cotton felt of rubberite 3, polyester one viscose rayon and black are not had fat cloth 1 and put into mould in order uniformly, at this moment, the mixolimnion 2 of the cotton felt of polyester one viscose rayon is more fluffy, seem thicker, use mould that material is imposed the pressure of regulation, and keep the regular hour, from mould, take out just passable then.
Claims (3)
1. compound acoustical material, it is characterized in that: comprise three-decker, innermost layer is that the black with fire retardation does not have fat cloth (1), and the middle layer is the good mixolimnion of sound-absorbing effect (2), and outermost layer is the rubberite (3) that sound is had iris action.
2. compound acoustical material according to claim 1 is characterized in that: described mixolimnion (2) is the mixture of the cotton felt of polyester one viscose rayon.
3. compound acoustical material according to claim 1 and 2 is characterized in that: be added with a thermofin between described mixolimnion (2) and the outermost rubberite (3), the material of thermofin is an aluminium foil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520126147 CN2847455Y (en) | 2005-12-20 | 2005-12-20 | Composite acoustic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520126147 CN2847455Y (en) | 2005-12-20 | 2005-12-20 | Composite acoustic material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2847455Y true CN2847455Y (en) | 2006-12-13 |
Family
ID=37512877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520126147 Expired - Lifetime CN2847455Y (en) | 2005-12-20 | 2005-12-20 | Composite acoustic material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2847455Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941400A (en) * | 2010-08-31 | 2011-01-12 | 江苏奔宇车身制造有限公司 | Low-noise, environment-friendly and energy-saving engineering machinery cab |
| CN108437587A (en) * | 2018-01-25 | 2018-08-24 | 合肥中科富华新材料有限公司 | A kind of novel organic film material of heat-insulating sound-insulating |
-
2005
- 2005-12-20 CN CN 200520126147 patent/CN2847455Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941400A (en) * | 2010-08-31 | 2011-01-12 | 江苏奔宇车身制造有限公司 | Low-noise, environment-friendly and energy-saving engineering machinery cab |
| CN108437587A (en) * | 2018-01-25 | 2018-08-24 | 合肥中科富华新材料有限公司 | A kind of novel organic film material of heat-insulating sound-insulating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20061213 |
|
| EXPY | Termination of patent right or utility model |