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Automobile side wall cavity sound absorption cotton and preparation method thereof

A technology of sound-absorbing cotton and cavity, which is applied to vehicle parts, transportation and packaging, etc. It can solve the problems of being unable to effectively block tire noise, road noise, wind noise, etc., and achieve the effect of flexible design

Inactive Publication Date: 2018-05-22
温州市环球汽车衬垫有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although sound-absorbing cotton is installed on the back of the side panel on traditional cars, it has not been able to effectively block tire noise, road noise, and wind noise from the outside.

Method used

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  • Automobile side wall cavity sound absorption cotton and preparation method thereof
  • Automobile side wall cavity sound absorption cotton and preparation method thereof
  • Automobile side wall cavity sound absorption cotton and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Preparation of crushed foam

[0037] Broken foam is a polyurethane foam material, which is composed of two components, A and B, and the weight ratio of the two components is: 100:45. The content of each raw material in component A is shown in Table 1, and component B is isocyanate compound, specifically polymethylene polyphenyl polyisocyanate. Among them, the gel catalyst is composed of 25% triethylenediamine and 75% 1,4 butanediol. As the cell opener, polybutadiene and fumed silica were used.

[0038] Concrete preparation steps are as follows:

[0039] (1) Mix the raw materials in component A, and add component B into the foaming machine separately, and set the flow rate of component A and component B: when setting the flow rate, turn on the high pressure, rotate the flowmeter, and set the flow rate to The actual high and low pressure flow is filled in, and the flow rate of components A and B is set as component A material: 240±10g / s B component material: 120±10g...

Embodiment 2

[0049] 1. Preparation of crushed foam

[0050] Broken foam is a polyurethane foam material, which is composed of two components, A and B, and the weight ratio of the two components is: 100:50. The content of each raw material in component A is shown in Table 1, and component B is isocyanate compound, specifically polymethylene polyphenyl polyisocyanate. Among them, the gel catalyst is composed of 25% triethylenediamine and 75% 1,4 butanediol. As the cell opener, polybutadiene and fumed silica were used.

[0051] Concrete preparation steps are as follows:

[0052] (1) Mix the raw materials in component A, and add component B into the foaming machine separately, and set the flow rate of component A and component B: when setting the flow rate, turn on the high pressure, rotate the flowmeter, and set the flow rate to The actual high and low pressure flow is filled in, and the flow rate of components A and B is set as component A material: 240±10g / s B component material: 120±10g...

Embodiment 3

[0061] 1. Preparation of crushed foam

[0062] Broken foam is a polyurethane foam material, which is composed of two components, A and B, and the weight ratio of the two components is: 100:50. The content of each raw material in component A is shown in Table 1, and component B is isocyanate compound, specifically polymethylene polyphenyl polyisocyanate. Among them, the gel catalyst is composed of 25% triethylenediamine and 75% 1,4 butanediol. As the cell opener, polybutadiene and fumed silica were used.

[0063] Concrete preparation steps are as follows:

[0064] (1) Mix the raw materials in component A, and add component B into the foaming machine separately, and set the flow rate of component A and component B: when setting the flow rate, turn on the high pressure, rotate the flowmeter, and set the flow rate to The actual high and low pressure flow is filled in, and the flow rate of components A and B is set as component A material: 240±10g / s B component material: 120±10g...

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PUM

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Abstract

The invention relates to the field of automobile accessories, in particular to automobile side wall cavity sound absorption cotton and a preparation method thereof. The sound absorption cotton comprises an outer bag made of an elastomer, and the outer bag is filled with crushed cotton and is sealed. The outer bag is made of the elastomer and filled with the crushed cotton, and the path of noise and vibration transmission can be blocked; meanwhile, due to the internal material porous structure, certain sound absorption performance is achieved, and the sound absorption cotton can be freely installed, is flexible in design and can be used for sealing cavities in various automobile bodies; additional assembly is not needed, and the sound absorption cotton can be directly placed in the cavitiesin the automobile bodies.

Description

technical field [0001] The invention relates to the field of auto parts, in particular to a sound-absorbing cotton for a side cavity of an automobile and a preparation method thereof. Background technique [0002] With the improvement of living standards, while satisfying the convenience of transportation, people continue to pursue high-safety and high-quality driving experience. More and more people pay more attention to the quietness and comfort of cars. The noise in the vehicle interior has higher requirements. At present, although sound-absorbing cotton is installed on the back of the side panel in traditional cars, it has been unable to effectively block tire noise, road noise, and wind noise from the outside. There is a bypass cavity structure formed by the closed box reinforcement beam in the side wall of the body; when the car is running at high speed, a high-speed airflow field will be generated in the side wall cavity, thereby generating and transmitting noise and...

Claims

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Application Information

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IPC IPC(8): B60R13/08C08G18/32C08G18/42C08G18/66C08G18/76C08G101/00
CPCB60R13/0815C08G18/3206C08G18/42C08G18/664C08G18/7664C08G2101/00
Inventor 欧湖斯
Owner 温州市环球汽车衬垫有限公司