Unlock instant, AI-driven research and patent intelligence for your innovation.

Foaming composition and method of cavity structure reinforcement

A foaming composition and a structure-enhancing technology, applied in the field of foaming materials, can solve the problems of increasing the weight of the automobile body, inconspicuous enhancement of the cavity structure, and high density of the metal shock-absorbing layer and the noise-reducing layer, etc.

Active Publication Date: 2019-03-01
BAIC MOTOR CORP LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the density of the metal shock-absorbing layer and the noise-reducing layer is relatively high, which increases the weight of the car body
Although filling sponge or film in the body cavity can achieve vibration reduction and noise reduction, its effect on the enhancement of the cavity structure is not obvious, and it cannot really improve the NVH performance of the car

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Foaming composition and method of cavity structure reinforcement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The foam composition of the present embodiment comprises following components:

[0035] Bisphenol A type E44: 600g, 3-Diethylaminopropylamine: 40g, NaHCO 3 : 100g, graphene: 6g, antioxidant 1010: 10g, γ-aminopropyltriethoxysilane: 4g.

[0036] Each component is weighed according to the above mass, and after thorough stirring, a foaming composition is obtained, and its viscosity at 20-30° C. is 500-1000 Pa·s.

Embodiment 2

[0038] The foam composition of the present embodiment comprises following components:

[0039] Bisphenol A type E51: 600g, 3-Diethylaminopropylamine: 50g, NaHCO 3 : 150g, graphene: 6g, antioxidant 1010: 10g, γ-aminopropyltriethoxysilane: 4g.

[0040] Each component is weighed according to the above mass, and after thorough stirring, a foaming composition is obtained, and its viscosity at 20-30° C. is 500-1000 Pa·s.

Embodiment 3

[0042] A method of cavity structure enhancement, please refer to figure 1 ,include:

[0043] Arrange two layers of carbon fiber felt in the cavity of a certain brand of car body;

[0044] The foaming composition in Example 1 is injected into the cavity by robot spraying, and the quality of the foaming composition injected into the cavity per cubic meter is about 20kg;

[0045] Bake the above-mentioned cavity, and keep it warm for about 25 minutes at a temperature of 115° C., that is, complete the filling of the cavity of the automobile body as a whole, and obtain a foamed reinforced composite material.

[0046] After testing, after the cavity structure of the car body is reinforced according to the above method, the structural durability-related properties such as bending stiffness and torsional stiffness of the car body, as well as the NVH performance of the car are improved.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a foaming composition and a cavity structure reinforcing structure. The foaming composition comprises the following components in parts by weight: 60-85 parts of epoxy resins, 5-15 parts of amine curing agents, 5-20 parts of a foaming agent, 0.2-2 parts of graphene, 0.5-5 parts of an antioxidant and 0.2-0.8 part of a silane coupling agent. The invention further provides a cavity structure reinforcing structure. The method specifically comprises the following steps: arranging a carbon fiber felt in a cavity; injecting the foaming composition into the cavity; keeping the temperature of the foaming composition to be 110-150 DEG C for 10-30 minutes. According to the foaming composition provided by the invention, the automobile cavity can be effectively filled and reinforced, and the NVH and safety performance of the automobile are improved.

Description

technical field [0001] The invention relates to a foaming composition and a method for enhancing a cavity structure, belonging to the technical field of foaming materials. Background technique [0002] The NVH (Noise, Vibration & Harshness) performance and safety performance of a car are comprehensive technical indicators to measure the level of modern car manufacturing. Because there are some cavities in the car body, such as thresholds, front walls, side walls, etc. , the cavity transmits engine noise, exhaust pipe noise, wind noise and tire noise. When the car is running at high speed, these cavities will form a high-speed airflow field, which will generate noise and vibration. [0003] In order to prevent noise and vibration, the usual solution is to set a metal shock-absorbing layer and a noise-reducing layer in the car cavity, or fill the cavity with materials such as sponge or film to block air flow. However, the density of the metal shock-absorbing layer and the no...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K3/04C08K5/134C08K5/544C08J9/08B29C44/12
CPCB29C44/12C08J9/08C08J2203/02C08J2363/00C08K3/04C08K5/1345C08K5/544C08L2203/14C08L63/00
Inventor 吴文倩
Owner BAIC MOTOR CORP LTD