Resin flow control method for RFI integral forming of cap type reinforced rib wallboard

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, can solve problems such as easy occurrence of dry spots, and achieve the effect of shortening time and improving molding efficiency.

Inactive 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 flow control method for RFI integral forming of cap type reinforced rib wallboard
  • Resin flow control method for RFI integral forming of cap type reinforced rib wallboard
  • Resin flow control method for RFI integral forming of cap type reinforced rib wallboard

Examples

Experimental program
Comparison scheme
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-based composite materials, and relates to a resin flow control method for RFI integral forming of a captype reinforced rib wallboard. In a conventional RFI process, a resin is divided at the root part of a cap type reinforced rib and flows to the cap top along layers between two sides of the cap typereinforced rib to generate dry spots at the cap top and the cap bottom, so that a part is scraped. By considering the structural characteristic of the cap type reinforced rib wallboard and the flowingcharacteristic of the resin in the RFI process, the cap type reinforced rib wallboard is decomposed into two structural units: an annular structure and a plate shaped structure, and a resin flow model suitable for resin flow control of the annular structure and the plate shaped structure simultaneously is established to form a resin flow model for RFI integral forming of the cap type reinforced rib wallboard. The resin is guided to flow in the RFI process course by paving the resin and arranging a gas circuit according to the established resin flow model, so that a preformed body of the cap type reinforced rib wallboard is infiltrated fully.

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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