Sound-absorbing cotton for noise-reduction automobile exhaust pipe

A technology of automobile exhaust and sound-absorbing cotton, which is applied in the direction of exhaust devices, noise reduction devices, mechanical equipment, etc., can solve the problem that the exhaust pipe does not have a noise reduction function, and achieves simple structure, excellent sound absorption performance, and low production cost Effect

Inactive Publication Date: 2017-01-25
WUHU EVERSHINE AUTOMOTIVE COMPONENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a noise reduction automobile exhaust pipe to solve the problem that the existing automobile exhaust pipe does not have a good noise reduction function

Method used

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  • Sound-absorbing cotton for noise-reduction automobile exhaust pipe
  • Sound-absorbing cotton for noise-reduction automobile exhaust pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] like Figure 1 to Figure 2 As shown, the present invention provides a noise reduction automobile exhaust pipe, which includes an intake pipe 1, a noise reduction cavity 2 communicated with the intake pipe 1, and a noise reduction plate 6 arranged on the outer wall of the noise reduction cavity 2. Enter the noise reduction cavity 2 for noise reduction. The noise reduction plate 6 is connected to the outer wall of the noise reduction cavity 2 through the connecting plate 61 .

[0025] Specifically, the inner space on the side of the noise reduction cavity 2 communicating with the air intake pipe 1 gradually increases in the intake direction, so that the exhaust pressure entering the noise reduction cavity 2 is reduced to achieve the purpose of noise reduction.

[0026] Further, a diverter 3 is arranged inside the noise reduction cavity 2; the diverter 3 is provided with several diverter channels 31; One side of the diverter 3 is provided with a hemispherical inner tank ...

Embodiment 2

[0030] Sound-absorbing cotton for noise reduction automobile exhaust pipe, composed of 40% epoxy resin, 45% polyether polyol DMN-3050, 5% diethanolamine, 5% 1,4-butanediol, 2% isobutyl vinyl ether and Made from 3% N-tert-butyl-2 benzothiazole sulfenamide.

Embodiment 3

[0032] The preparation method of sound-absorbing cotton for noise reduction automobile exhaust pipe, the steps are as follows:

[0033] 1), add epoxy resin, diethanolamine and 1,4-butanediol into the mixer A and mix well, adjust the constant material temperature to 25°C, and adjust the speed of the mixer to 3000r / min;

[0034] 2) Pour the polyether polyol DMN-3050, isobutyl vinyl ether and N-tert-butyl-2 benzothiazole sulfenamide preheated to 25°C into the mixture A in turn, and stir for 5 minutes to obtain mixed material B;

[0035] 3) Pour the mixed material B into a sound-absorbing cotton mold preheated to 40°C, and demold it after 5 minutes to obtain a sound-absorbing cotton product.

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PUM

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Abstract

The invention provides sound-absorbing cotton for a noise-reduction automobile exhaust pipe. The sound-absorbing cotton is prepared from, in weight percentage, 40% of epoxy resin, 45% of polyether polyol DMN (dimethylnitrosamine)-3050, 5% of diethanol amine, 5% of 1,4-butanediol, 2% of isobutyl vinyl ether and 3% of N-tert-2-benzothiazyl sulfonamide. The sound-absorbing cotton for the noise-reduction automobile exhaust pipe is excellent in sound-absorbing performance and wide in sound-absorbing frequency range and can overcome the shortcomings of fiber materials, non-woven materials and plastic materials, weather resistance and strength are achieved, the sound-absorbing effect of the sound-absorbing cotton can reach 3 times or more as compared with that of a traditional sound-absorbing material.

Description

technical field [0001] The invention relates to the technical field of the automobile industry, in particular to a sound-absorbing cotton for noise reduction automobile exhaust pipes. Background technique [0002] With the advancement of science and technology and the improvement of people's living standards, more and more cars appear in people's daily life, but the exhaust gas and noise from the automobile exhaust pipe have become a major problem. [0003] The automobile exhaust pipe is one of the important components in the automobile exhaust system. The existing automobile exhaust pipe usually has only one exhaust main pipe, but the exhaust main pipe usually does not have a good noise reduction function. Therefore, it is necessary to provide a noise reduction automobile exhaust pipe to solve the above problems. [0004] In addition, the sound-absorbing cotton in the prior art, whether it is wood board, slag cotton, or other materials such as artificial inorganic fiber co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N13/08F01N13/16C08L71/00C08L63/00C08K5/17C08K5/053C08K5/06C08K5/47
CPCF01N13/08C08L71/00F01N13/007F01N13/082F01N13/16C08L63/00C08K5/17C08K5/053C08K5/06C08K5/47
Inventor 刘华
Owner WUHU EVERSHINE AUTOMOTIVE COMPONENT
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