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Double density cowl panel for light-weight sound-absorbing car and preparation method of double density cowl panel

A front wall, double-density technology, applied in chemical instruments and methods, vehicle parts, rayon manufacturing, etc., can solve the problems of difficulty in suppressing low and medium frequency bands, and it is difficult to meet actual needs, so as to improve driving. Experience the effect of light weight, high strength impact resistance

Active Publication Date: 2020-01-14
江苏环宇汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional sound insulation materials, such as glass fiber cotton, styrofoam, sound insulation and sound-absorbing cotton, etc., these materials mainly rely on the conversion of kinetic energy into heat energy when sound waves propagate in pores to achieve sound wave attenuation, which has a significant effect on high-frequency noise. However, it is difficult to achieve ideal suppression in the low and medium frequency bands.
Therefore, in order to effectively isolate the medium and low frequency sound waves of 600-1200HZ, a material barrier with a thickness of about 70dm is required, which is difficult to meet the actual needs

Method used

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  • Double density cowl panel for light-weight sound-absorbing car and preparation method of double density cowl panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] see figure 1, a lightweight sound-absorbing double-density dash panel for automobiles, comprising a dash panel body 1, a first sound-absorbing layer 2 arranged outside the dash panel body 1, and a mixed fiber sound-absorbing layer 3 arranged outside the first sound-absorbing layer 2, The mixed fiber sound-absorbing layer 3 is provided with a second sound-absorbing layer 4, the second sound-absorbing layer 4 is provided with a noise-reducing and vibration-damping plate 5, and the noise-reducing and vibration-damping plate 5 is provided with a heat-insulating layer 6 and a protective layer 7 in sequence;

[0037] The dashboard body 1 is made of modified ABS resin, and the modified ABS resin includes the following raw materials in parts by weight: 10-12 parts of nano-silicon nitride, 1-2 parts of tetraethyl silicate, PVDF28-30 60-65 parts of ABS resin, 1-1.2 parts of siloxane coupling agent, 0.2-0.3 parts of vulcanizing agent DCP, 10-12 parts of polyisocyanate;

[0038] T...

Embodiment 2

[0055] see figure 1 , a lightweight sound-absorbing double-density dash panel for automobiles, comprising a dash panel body 1, a first sound-absorbing layer 2 arranged outside the dash panel body 1, and a mixed fiber sound-absorbing layer 3 arranged outside the first sound-absorbing layer 2, The mixed fiber sound-absorbing layer 3 is provided with a second sound-absorbing layer 4, the second sound-absorbing layer 4 is provided with a noise-reducing and vibration-damping plate 5, and the noise-reducing and vibration-damping plate 5 is provided with a heat-insulating layer 6 and a protective layer 7 in sequence;

[0056] The dashboard body 1 is made of modified ABS resin, and the modified ABS resin includes the following raw materials in parts by weight: 10-12 parts of nano-silicon nitride, 1-2 parts of tetraethyl silicate, PVDF28-30 60-65 parts of ABS resin, 1-1.2 parts of siloxane coupling agent, 0.2-0.3 parts of vulcanizing agent DCP, 10-12 parts of polyisocyanate;

[0057] ...

Embodiment 3

[0077] see figure 1 , a lightweight sound-absorbing double-density dash panel for automobiles, comprising a dash panel body 1, a first sound-absorbing layer 2 arranged outside the dash panel body 1, and a mixed fiber sound-absorbing layer 3 arranged outside the first sound-absorbing layer 2, The mixed fiber sound-absorbing layer 3 is provided with a second sound-absorbing layer 4, the second sound-absorbing layer 4 is provided with a noise-reducing and vibration-damping plate 5, and the noise-reducing and vibration-damping plate 5 is provided with a heat-insulating layer 6 and a protective layer 7 in sequence;

[0078] The dashboard body 1 is made of modified ABS resin, and the modified ABS resin includes the following raw materials in parts by weight: 10-12 parts of nano-silicon nitride, 1-2 parts of tetraethyl silicate, PVDF28-30 60-65 parts of ABS resin, 1-1.2 parts of siloxane coupling agent, 0.2-0.3 parts of vulcanizing agent DCP, 10-12 parts of polyisocyanate;

[0079] ...

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Abstract

The invention relates to a double density cowl panel for a light-weight sound-absorbing car and a preparation method of the double density cowl panel. The cowl panel comprises a cowl panel body (1), afirst sound absorption layer (2) is arranged outside the cowl panel body (1), a mixed fiber sound absorption layer (3) is arranged outside the first sound absorption layer (2), a second sound absorption layer (4) is arranged outside the mixed fiber sound absorption layer (3), a noise reduction damping plate (5) is arranged outside the second sound absorption layer (4), and a heat insulation layer(6) and a protective layer (7) are arranged outside the noise reduction damping plate (5) in turn. According to the double density cowl panel and the preparation method thereof, the cowl panel of thecar has simple structure, excellent damping force and vibration attenuation characteristics on the basis of ensuring the strength and rigidity, and can reduce sound insulation and absorption accessories, high-strength impact resistance and excellent sound insulation performance is achieved, lightweight of the cowl panel is further achieved, and the manufacturing process is simple.

Description

technical field [0001] The invention belongs to the technical field of automobile vibration reduction, and in particular relates to a lightweight sound-absorbing double-density dash panel for automobiles and a preparation method thereof. Background technique [0002] In modern life, automobiles have become the main means of transportation for people. With the development of the automobile industry, people began to put forward requirements for the comfort and quietness of automobiles, and the noise of automobiles mainly comes from the engine. key to noise reduction. The front wall is the partition between the engine room and the compartment. It is connected with the floor and the front pillar and installed under the upper cover of the front wall. It is used for the passage of roads and wire harnesses, and it also needs to cooperate with the installation positions of pedals, square machine columns and other parts. [0003] At present, as noise control regulations become more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/30B32B27/38B32B27/32B32B27/02B32B27/08B32B25/00B32B25/08B32B25/04B32B33/00B32B27/28B32B27/06B32B3/08B62D25/08B60R13/08C08L55/02C08L27/16C08K13/02C08K5/14C08K3/34D01F6/46D01F8/06D01F8/18D01F1/10C08L21/00C08K3/08C08J9/04
CPCB32B3/08B32B5/02B32B5/022B32B5/18B32B5/245B32B5/26B32B27/06B32B27/08B32B27/12B32B27/281B32B27/30B32B27/38B32B33/00B32B37/06B32B37/08B32B2262/023B32B2262/0253B32B2266/0207B32B2307/102B32B2307/558B32B2307/56B32B2307/584B32B2307/718B32B2355/02B32B2363/00B32B2379/08B32B2605/08B60R13/08B62D25/08C08J9/04C08J2321/00C08K2003/0812C08K2201/011C08L55/02D01F1/10D01F6/46D01F8/06D01F8/18C08L27/16C08K13/02C08K5/14C08K3/34
Inventor 王泽云张亮徐明立王凯
Owner 江苏环宇汽车零部件有限公司