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Prepreg/resin film infiltration co-curing forming method for composite stiffened wallboards

A technology of reinforced wall panels and composite materials, applied in the field of composite materials, can solve the problems of long operation time of prepreg blanks, reduce the forming efficiency of parts, increase manufacturing costs, etc., achieve high application value, low manufacturing cost, shorten The effect of manufacturing time

Active Publication Date: 2014-08-06
SHANGHAI AIRCRAFT MFG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite material produced by this process has excellent performance and high quality stability, but the laying and laying of prepreg blanks takes a long time, and consumes a lot of manpower and material resources, especially for ribs with complex shapes, which will significantly reduce the quality of the finished product. The molding efficiency increases its manufacturing cost

Method used

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  • Prepreg/resin film infiltration co-curing forming method for composite stiffened wallboards
  • Prepreg/resin film infiltration co-curing forming method for composite stiffened wallboards
  • Prepreg/resin film infiltration co-curing forming method for composite stiffened wallboards

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The prepreg / resin film infiltration co-curing process was used to prepare I-shaped reinforced wall panels. Dry fibers are used to prepare the I-shaped rib preform, which is T700 unidirectional carbon fiber cloth, the type of resin film is epoxy resin, and the skin is prepared with T300 carbon fiber / epoxy prepreg. The layering method of skin and ribs is unidirectional layering. During the molding process, the vacuum is greater than 0.095MPa, and the pressure is 0.4MPa, and the temperature is raised to 180°C at 1-2°C / min and kept for 2 hours to complete the curing.

Embodiment 2

[0030] The prepreg / resin film infiltration co-curing process was used to prepare L-shaped reinforced wall panels. Dry fibers are used to prepare L-shaped rib preforms, which are unidirectional glass fiber cloth, the type of resin film is benzoxazine resin, and the skin is made of glass fiber / benzoxazine resin prepreg. The layering method of skin and ribs is ribs: [45 / 0 / -45 / 90 / 45 / 0 / -45 / 0 / 45 / -45], skin: [-45 / 0 / 45 / 90 / -45 / 0 / 0 / 45 / 90 / -45 / 0 / 45]s. During the molding process, the vacuum is greater than 0.098MPa, and the pressure is 0.6MPa, and the temperature is raised to 180°C at 1-2°C / min for 3 hours to complete the curing.

Embodiment 3

[0032] The prepreg / resin film infiltration co-curing process was used to prepare J-shaped reinforced wall panels. The J-shaped rib preform is prepared by dry fiber, which is T800 carbon fiber plain weave cloth, the resin film type is Shuangma resin, and the skin is prepared by T800 carbon fiber / Shuangma resin prepreg. The layering method of skin and ribs is

[0033] Rib: [45 / 0 / -45 / 90 / 0 / 45 / 0 / -45 / 90 / 0 / 45 / 0 / -45 / 0 / 45 / -45]

[0034] Skinning: [-45 / 0 / 45 / 90 / -45 / 0 / 45 / 90 / -45 / 0 / 45 / 90 / -45 / 0 / 45]. During the molding process, the vacuum is greater than 0.095MPa, and the pressure is 0.7MPa, and the temperature is raised to 210°C at 1-2°C / min for 5 hours to complete the curing.

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Abstract

The invention discloses a prepreg / resin film infiltration co-curing forming method for composite stiffened wallboards. The method comprises the following steps: 1, tailoring prepregs, dry fibers and resin films; 2, spreading the prepregs and sizing dry fiber preforms; 3, assembling and packaging a mould for the stiffened wallboards; 4, co-curing and forming the stiffened wallboards; and 5, demolding the stiffened wallboards. According to the method, a skin is prepared by adopting prepreg spreading, ribs are prepared by the dry fiber preforms and the resin films, and in combination with the characteristics of a prepreg autoclave process and a resin film melting process, the ribs, the skin and the adhesive interface of the ribs and the skin are cured in an autoclave at the same time, thus realizing the co-curing forming of the stiffened wallboards with different rib forms and different material systems. The method can significantly improve the forming efficiency of the stiffened wallboard structure, reduce the manufacture cost, improve the quality of products and improve the flexibility and designability of the manufacturing process and is of great significance to the efficient low-cost manufacture of the composite material stiffened wallboard structure.

Description

technical field [0001] The invention relates to a composite material, in particular to a molding method, in particular to a prepreg / resin film infiltration co-curing molding method for a composite material reinforced wallboard. Background technique [0002] Composite material reinforced panel structure, composed of composite material ribs and composite material skin, is a typical structural member in aircraft composite material structure. It is usually formed by the prepreg autoclave process. The process is to make the prepreg (the fiber sheet or its fabric impregnated with the resin matrix, which is an intermediate material for the manufacture of composite materials) according to the shape and size of the part. ) cutting, laying ribs and skin blanks with a certain shape according to a certain laying direction and number of laying layers, after shaping and packaging in a mold, curing and molding in an autoclave to obtain a reinforced wall panel structure . The composite ma...

Claims

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Application Information

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IPC IPC(8): B29C70/44
CPCB29C70/342
Inventor 张冬梅顾轶卓贾丽杰李敏苏佳智马绪强魏冉李艳霞张佐光
Owner SHANGHAI AIRCRAFT MFG
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