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Resin flowing control method for cap-shaped additional rib wall plate RFI overall forming

A technology of resin flow and control method, which is applied in the field of resin flow control of RFI integral molding of hat-shaped reinforced wall panels, which can solve the problems of dry spots and other problems, and achieve the effect of shortening time and improving molding efficiency

Active Publication Date: 2020-05-15
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a resin flow control method for RFI integral molding of hat-shaped reinforced wall panels to realize the integral molding of high-quality hat-shaped reinforced wall panels.

Method used

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  • Resin flowing control method for cap-shaped additional rib wall plate RFI overall forming
  • Resin flowing control method for cap-shaped additional rib wall plate RFI overall forming
  • Resin flowing control method for cap-shaped additional rib wall plate RFI overall forming

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Example 1: A test piece of a hat-shaped reinforced wall panel with a size of 1.5m×0.7m, with two hat-shaped reinforcements 9 equal in length to the skin 10, and the bottom flange of the hat-shaped reinforcement is sewn to the skin 10 Then it is shaped by RFI process. The hat-shaped composite material reinforced wall plate test piece was prepared by using this scheme, and the specific operation method is as follows:

[0048] a. Structural unit division of hat-shaped reinforced panel

[0049] In order to realize the resin flow control of the hat-stiffened panel, the structure of the hat-stiffened panel was decomposed. The two side walls of the hat-shaped reinforcement, the top of the hat, and the skin at the bottom of the hat-shaped reinforced cavity are regarded as a ring structure 1, and the lower flange of the hat-shaped reinforcement and the skin outside the hat-shaped reinforced cavity form a plate shape Structure 2.

[0050] b. Select a resin flow model suitable ...

Embodiment 2

[0058] Embodiment 2: A hat-shaped reinforced wall panel with a size of 6.0m×0.9m, with 4 hat-shaped reinforcements 9 and a length of 4.5m. Stitched with skin and shaped by RFI process. The hat-shaped composite material reinforced wallboard is prepared by using this scheme, and the specific operation method is as follows:

[0059] a. Structural unit division of hat-shaped reinforced panel

[0060] In order to realize the resin flow control of the hat-stiffened panel, the structure of the hat-stiffened panel was decomposed. The skin on both sides of the hat-shaped reinforcement, the top of the hat, and the bottom of the hat-shaped reinforced cavity is regarded as a ring structure 1, and the bottom flange of the hat-shaped reinforcement and the skin outside the hat-shaped reinforced cavity form a plate-shaped structure 2.

[0061] b. Select a resin flow model suitable for RFI molding of hat-shaped reinforced wall panels

[0062] The first resin flow control model 7 of the hat...

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Abstract

The invention belongs to the technical field of low-cost manufacturing of high-performance resin matrix composite materials and relates to a resin flowing control method for cap-shaped additional ribwall plate RFI overall forming. In a traditional RFI technology, resin is diverted at the root parts of cap-shaped additional ribs, the resin flows towards cap tops along the interlayer of the two sides of each cap-shaped additional rib, dry spots are likely to be generated at the cap tops and cap bottoms, and part scrapping is caused. By means of the resin flowing control method for cap-shaped additional rib wall plate RFI overall forming, structure characteristics of a cap-shaped additional rib wall plate and RFI technology resin flowing characteristics are taken into consideration, the cap-shaped additional rib wall plate is decomposed into two kinds of structure units including a ring-shaped structure and a plate-shaped structure, a resin flowing module suitable for resin flowing control of the ring-shaped structure and the plate-shaped structure at the same time is established, a cap-shaped additional rib wall plate RFI overall forming resin flowing model is formed, resin laying is conducted according to the established resin flowing model, a gas way is arranged in the RFI technology process for guiding the resin to flow, and complete soaking of a cap-shaped additional rib wall plate pre-formed body in the resin is achieved.

Description

technical field [0001] The invention belongs to the technical field of low-cost manufacturing of high-performance resin-based composite materials, and relates to a resin flow control method for RFI integral molding of hat-shaped reinforced wall panels. Background technique [0002] With the continuous expansion of the amount of composite materials, improving the structural integrity and reducing the manufacturing cost of composite materials has become the development trend of composite materials. Because the resin film infiltration process Resin Film Infusion (referred to as RFI) can combine three-dimensional reinforcement technologies such as stitching and weaving to improve the structure of traditional laminates. Interlayer strength and impact damage resistance, and the advantages of being suitable for integral molding of large-scale wall panels have been more and more used in recent years. The realization of RFI process resin transfer is the key to the success of molding....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54
CPCB29C70/34B29C70/54
Inventor 高艳秋赵龙
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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