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Method for forming novel resin-based composite material by resin films through permeation

A composite material and resin film technology, applied in the field of composite material manufacturing, can solve problems such as reinforcement height limitation, fiber bending, and wrinkling.

Active Publication Date: 2014-07-09
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the traditional RFI process for forming reinforced panel parts has certain restrictions on the height of the reinforcement.
[0006] (2) Since the traditional RFI process usually calculates the total amount of resin required for the part to prepare the resin film according to the layup area and thickness of the molded part, it is easy to control the uniformity of resin content for parts with equal thickness, but for parts with variable thickness Resin content uniformity control in the thickness region is more difficult to achieve
[0007] (3) Because the traditional RFI process puts all the resin film on the bottom of the preform, that is, the outer surface of the part, the thicker resin film will often cause local fibers on the outer surface of the preform to bend or wrinkle during the melting and infiltration process, thus affecting the outer surface of the wall panel. Surface quality

Method used

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  • Method for forming novel resin-based composite material by resin films through permeation
  • Method for forming novel resin-based composite material by resin films through permeation
  • Method for forming novel resin-based composite material by resin films through permeation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Example 1: A plate with a size of 850mm×670mm. The material of the plate is U7192 / QY9512, and there are 24 layers of U7192 carbon fiber fabric in total. It is required that the fiber volume content of the plate after forming is 60%. The surface density of U7192 carbon fiber fabric is 195g / m 2 , U7192 carbon fiber fabric adopts T700 fiber density 1.81g / cm 3 , QY9512 resin density 1.24g / cm 3 . We adopt the RFI forming technology of the present invention, and the specific process steps are as follows:

[0094] a. Calculate the surface density of the resin film corresponding to the single-layer fabric according to the fiber volume content of the part, the surface density of the fabric used, the fiber density used in the fabric, and the matrix resin density, accurate to one decimal place.

[0095] W R 0 = ( 1 - ...

Embodiment 2

[0116] Example 2: figure 2 The outer dimension is 1000mm×650mm, which is a variable-thickness wallboard structure. The material is G0827 carbon fiber fabric. The number of fabric layers is 22 layers. Both ends are thickened. There are 18 layers of intercalation at each end. Inter-toughened, the wallboard fiber volume content is 58%, and the RFI forming technology of the present invention is adopted. G0827 carbon fiber fabric, areal density 160g / m 2 , G0827 fabric adopts T300 fiber density 1.76g / cm 3 , toughened QY9512 resin density 1.24g / cm 3 . The specific process steps are as follows:

[0117] a. Calculate the surface density of the resin film corresponding to the single-layer fabric according to the fiber volume content of the part, the surface density of the fabric used, the fiber density used in the fabric, and the matrix resin density, accurate to one decimal place.

[0118] W R 0 = ...

Embodiment 3

[0140] Embodiment 3: The structure of the outer wall plate of the box section test piece is as follows Figure 4 , the overall dimensions are 900mm×520mm×105mm (length×width×height), and there are 5 “J”-shaped reinforcements in the longitudinal direction. 30 layers, reinforced with 15 layers of G0827 carbon fiber fabric, the resin adopts QY9512 resin and requires interlayer toughening, and the fiber volume content of the outer wall panel requires 58%, which is integrally formed by RFI technology. The surface density of G0827 carbon fiber fabric is 160g / m 2 , G0827 carbon fiber fabric adopts T300 fiber density 1.76g / cm 3 , toughened QY9512 resin density 1.24g / cm 3 . Here we adopt the technical scheme of the present invention, and concrete processing steps are as follows:

[0141] a. Calculate the surface density of the resin film corresponding to the single-layer fabric according to the fiber volume content of the part, the surface density of the fabric used, the fiber dens...

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Abstract

The invention belongs to a resin-based composite material liquid forming technology, and relates to a method for forming a novel resin-based composite material by resin films through permeation. A resin film is placed between every two adjacent fabrics of a fiber reinforced preform. The surface density of the resin films is figured out according to parameters such as a part fiber content requirement and surface density of an adopted fabric. According to the method, a placement mode of resin films in a conventional resin film permeation forming process is changed, the distance of flowing resin in the permeation process is shortened, the limit of the conventional resin film permeation process to the reinforcement height of a reinforcement wallboard structure is broken, and the structure applicability and the process reliability of the resin film permeation forming process are improved.

Description

technical field [0001] The invention belongs to the technical field of composite material manufacturing, and relates to a method for molding a resin-based composite material by resin film infiltration (Resin Film Infusion, referred to as RFI). Background technique [0002] Resin film infiltration or RFI forming composite material technology is a low-cost composite material manufacturing technology developed in recent years. It has attracted extensive attention because of its advantages such as low manufacturing cost, high molding efficiency, good integrity, and suitable for integral molding of large components. [0003] At present, for the resin film infiltration molding method of high-performance composite materials: usually, the total amount of resin required for the wall panel skin and reinforcement is calculated according to the lay-up area and the number of lay-up layers of the molded parts, and the required The resin is prepared into a resin film and placed on the bott...

Claims

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Application Information

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IPC IPC(8): B29C70/38
CPCB29C70/38
Inventor 高艳秋赵龙
Owner AVIC COMPOSITES
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