Foam sandwich composite material for aviation dining car and preparation method of foam sandwich composite material

A technology for composite materials and dining cars, which is applied in the field of foam sandwich composite materials for aviation dining cars and its preparation, and can solve problems such as difficulty in meeting the design requirements of high-performance sandwich structure composite materials, excessive emissions of volatile organic compounds, and insufficient processing of composite materials. Achieve the effect of overcoming the large difference in resin content, facilitating infiltration, and reducing the volatilization of harmful gases

Inactive Publication Date: 2017-05-10
THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process can better solve the infiltration and bonding of resin to reinforcing materials, but there are still a series of problems such as excessive volatile organic compound (VOC) emissions, unstable product quality, large amount of resin consumption and waste, and uncontrollable thickness of parts.
The reason is that the process of composite materials is insufficient, and the whole process of automatic processing cannot be adopted, and manual operation is required, such as hand lay-up process, otherwise satisfactory products cannot be produced, which is also a defect limited to process treatment. The system has strict requirements, and the resin used must meet the hand lay-up process and the vacuum introduction process at the same time, or use two kinds of resins, the process is complicated, and it is difficult to meet the design requirements of high-performance sandwich structure composite materials

Method used

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  • Foam sandwich composite material for aviation dining car and preparation method of foam sandwich composite material
  • Foam sandwich composite material for aviation dining car and preparation method of foam sandwich composite material
  • Foam sandwich composite material for aviation dining car and preparation method of foam sandwich composite material

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Embodiment 1

[0045] See attached Figure 1-3 , the outer fiber fabric layer 2 of the foam sandwich composite material used for the main frame of the aviation dining car is 3 layers of biaxial glass fiber plain weave fabric, the inner fiber fabric layer 4 is 2 layers of biaxial carbon fiber plain weave fabric, and the foam core 3 of the sandwich layer is hard Quality polyurethane foam, the foam is provided with connected holes 15 and grooves 14, wherein: foam core density 49kg / m 3 , the thickness is 12mm, the hole diameter is 2.5mm, the hole density is 330 / m 2 , groove width 2.5mm, groove depth 4mm, groove density 64 pieces / m 2 , Epoxy resin is selected for the vacuum introduction molding process (initial viscosity 400mpa·s, operation time 45min). Its preparation method is as follows:

[0046] (1) Preparation before layering

[0047] Grinding and cleaning the working surface of the metal mold 1, coating the mold release agent, assembling the mold 1 and sealing the joints with adhesive s...

Embodiment 2

[0061] The outer fiber layer of the foam sandwich composite material used for the main frame of the design aviation dining car is 1 layer of biaxial fiberglass plain weave fabric, 2 layers of warp-knitted aramid fiber plain weave fabric, and the inner fiber layer is 3 layers of biaxial fiberglass plain weave fabric. The layer is polymethacrylimide foam, and the foam is provided with connected holes and grooves, wherein: the foam density is 54kg / m 3 , thickness 10mm, hole diameter 2.8mm, hole density 360 / m 2 , groove width 2.2mm, groove depth 4.2mm, groove density 72 pieces / m 2 , The vacuum introduction molding process uses phenolic resin (initial viscosity 360mpa·s, operating time 52min). Its preparation method is as follows:

[0062] Each structure described in this embodiment can refer to the attached Figure 1-3 .

[0063] (1) Preparation before layering

[0064] Grinding and cleaning the working surface of the metal mold 1, coating the mold release agent, assembling t...

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Abstract

The invention discloses a foam sandwich composite material for an aviation dining car and a preparation method of the foam sandwich composite material. The preparation method of the foam sandwich composite material mainly comprises the steps of preparation before laminating, reinforcing material laminating, glue injection system arranging, vacuum system arranging, air tightness inspecting, resin pouring and solidification demolding. According to the preparation method, holes and grooves are formed in foam cores of reinforcing material laminating layers, and the holes and the grooves communicate with one another; and after vacuumizing is conducted, resin is poured, and complete wetting of the reinforcing material laminating layers is ensured. The prepared composite material is stable in quality, high in production efficiency, low in cost, small in pollution, good in strength and interference bonding performance, and long in service life.

Description

technical field [0001] The invention belongs to the field of production and manufacture of aviation dining cars, and in particular relates to a foam sandwich composite material for aviation dining cars and a preparation method thereof. Background technique [0002] With the rapid development of the civil aviation industry and the increasingly stringent environmental protection requirements, countries attach great importance to the energy saving and emission reduction of civil aviation passenger aircraft. As an integral part of the service of civil aviation airliners, the aviation dining car has now become the key equipment for reducing the weight of the cabin. For a long time, aluminum aviation dining trucks have occupied an absolute market, but due to the high metal density and the weight of the whole vehicle, the energy consumption is relatively high, which is not conducive to the low-carbon emission of passenger aircraft. Sandwich structure composite materials have light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/36A47B31/00
CPCB29C70/36A47B31/00A47B2031/002
Inventor 陈剑平白杰袁彬彬李文君袁源陈就
Owner THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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