A kind of resin matrix composite material, preparation method and used vacuum bag

A composite material and vacuum bag technology, which is applied in the field of composite material manufacturing, can solve the problems of not being able to ensure the excellent internal quality of the product, composite materials containing air bubbles, and long molding time of materials, so as to improve the impact resistance and damage resistance, prolong the service life, The effect of improving internal quality and load-carrying capacity

Active Publication Date: 2019-11-22
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems in the existing resin-based composite materials preparation process. For example, when the liquid molding process is used to prepare large-thickness parts, there is a contradiction between the molding time and the internal quality, that is, if the internal quality is good, the molding time of the material is very long. The production efficiency is greatly reduced, and the rapid preparation of materials cannot be completed in a short time; on the contrary, if the molding time is shortened, that is, the molding time period, the internal defects such as air bubbles and poor infiltration of the composite material will increase significantly, and the internal quality of the product cannot be guaranteed.
In addition, especially the vacuum infusion process for preparing large parts, it is more directly faced with the above problems

Method used

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  • A kind of resin matrix composite material, preparation method and used vacuum bag
  • A kind of resin matrix composite material, preparation method and used vacuum bag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of Epoxy-based Carbon Fiber Composite Parts

[0043] The part requires a thickness of 80mm, using dry carbon cloth as the reinforcing material, and epoxy resin cured at 240°C as the matrix. Carbon cloth needs to be laid 300 layers;

[0044] For the selection of vacuum bags, refer to the curing temperature of the resin, choose a grafted modified polypropylene film with a melting temperature of 190°C and a thickness of 0.05mm as the inner bag, and choose a high temperature resistant polyimide film as the outer bag;

[0045] Isolation layup, see figure 2 The schematic diagram of the design, with 10 layers of carbon cloth as a thin-layer unit, a total of 30 units are prepared; each unit should be sealed with a hot-melt gun, and a glue injection tube and a vacuum tube are pre-embedded at both ends; finally, all the thin-layer The units are placed in the order of layers, sealed with an outer bag, and the two ends are also pre-embedded with rubber pipes and vacu...

Embodiment 2

[0051] Preparation of Polyimide Resin-Based Carbon Fiber Composite Parts

[0052] The part requires a thickness of 50mm, using dry carbon cloth as a reinforcing material, and polyimide resin cured at 260°C as a matrix. Carbon cloth needs to be laid 200 layers.

[0053] For the selection of vacuum bags, refer to the curing temperature of the resin, choose a grafted modified polypropylene film with a melting temperature of 110°C and a thickness of 0.05mm as the inner bag, and choose a high temperature resistant polyimide film as the outer bag;

[0054] Isolation layup, see figure 2 The schematic diagram of the design, with 10 layers of carbon cloth as a thin-layer unit, a total of 20 units are prepared; each unit should be sealed with a hot-melt gun, and a glue injection tube and a vacuum tube are pre-embedded at both ends; finally, all the thin-layer The units are placed in the order of layers, sealed with an outer bag, and the two ends are also pre-embedded with rubber pipe...

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Abstract

The invention provides a resin matrix composite material and a preparation method and a vacuum bag for the resin matrix composite material. The concept of "layered manufacturing" is proposed. A large-thickness product is divided into a plurality of micro unit layers on the thickness by low-melting-point plastic films, and heating and pressurizing are performed after vacuum infiltration, so that internal defect of the product is reduced, and the molding speed is accelerated. The low-melting-point plastic is mixed with thermosetting resin after melting to form a layered toughening layer at the micro level, so that interlayer toughness of the product is improved. The concept of "layered manufacturing" provides a new idea for the manufacture of the resin matrix composite material.

Description

technical field [0001] The invention relates to a method for preparing a resin-based composite material, belonging to the field of composite material manufacturing. Background technique [0002] With the advantages of mechanical design, corrosion resistance, high specific strength, and high specific modulus, resin-based composite materials have always been one of the most popular materials in military fields such as aerospace, aviation, and weapons, and are also active in the core materials of high-end weapons and high-end products. . Our country also vigorously advocates the use of resin-based composite materials in the fields of aerospace and aviation to achieve the goals of "weight reduction and range extension", thereby improving the working efficiency and combat capability of aircraft. For example, the main parts of large aircraft in my country, such as vertical fins and rudders, use large-scale composite materials, and the amount of composite materials is used as an i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/34B29C70/06B29C70/54
CPCB29C70/06B29C70/342B29C70/54
Inventor 毕向军方旭东王红丽邓延
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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