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Preparation method of low heat expansion carbon fiber reinforced resin matrix composite material mold

A reinforced resin-based, low thermal expansion technology, applied in the field of composite material preparation, can solve the problems of high specific stiffness, low thermal expansion, thermal expansion coefficient and composite material mismatch

Active Publication Date: 2013-09-04
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of large metal mold quality, long production cycle, and mismatch between thermal expansion coefficient and composite material, and propose a method for preparing a low thermal expansion carbon fiber reinforced resin-based composite material mold, and the prepared composite material mold has high specific strength , high specific stiffness, low thermal expansion, short manufacturing cycle, fatigue resistance, corrosion resistance, light weight and good damage safety performance

Method used

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  • Preparation method of low heat expansion carbon fiber reinforced resin matrix composite material mold
  • Preparation method of low heat expansion carbon fiber reinforced resin matrix composite material mold

Examples

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Embodiment 1

[0031] The example produced is a molding mold required for forming high-precision carbon fiber parabolic products. The diameter of the parabolic projected area is 0.9m, and the profile is an irregular surface. The long-term use temperature of the mold is required to be higher than 150°C, and the linear expansion coefficient of the mold material at 150°C is not greater than 4×10 -6 / K.

[0032] The first step is to design the mold structure:

[0033] Add a 100mm process edge on the periphery of the product to make a vacuum bag when the composite material product is formed. The shape and structure of the mold are as follows figure 2 shown. And design the mold forming master mold, the master mold is a concave mold to ensure the mold surface after molding;

[0034] The second step is to design the surface layer of the mold: according to the thermal expansion coefficient of the mold, it is not greater than 4×10 -6 / K, through finite element analysis modeling, the design surfac...

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Abstract

The invention relates to a preparation method of a low heat expansion carbon fiber reinforced resin matrix composite material mold, belonging to the technical field of composite material preparation. The method is capable of forming a molding surface with a VARI (Vacuum Assisted Resin Infusion) technique, and ensuring low heat expansion performance of the mold by controlling the carbon fiber laying direction, precuring temperature, postcuring manner and postprocessing manner of the molding surface. With the adoption of the VARI technique, when a vacuum pressure reaches to 0.1MPa, carbon fiber cloth is compressed by vacuum, so that the product is internally dense after resin is guided in the product, and the volume content of composite material fibers is ensured; and meanwhile, bubbles between carbon fiber cloth layers are removed so as to ensure that the content of internal pores of the composite material is as few as possible and ensure the strength of the composite material.

Description

technical field [0001] The invention relates to a method for preparing a mold of a low thermal expansion carbon fiber reinforced resin-based composite material, and belongs to the technical field of composite material preparation. Background technique [0002] Due to their excellent material properties and process characteristics, composite materials are widely used in aerospace structural parts such as aircraft wings, fuselages, central wing boxes, upper stages of launch vehicles, satellite load-bearing tubes, satellite battery arrays, and missile shells. The above has been widely used, but in my country's application scale and level, manufacturing technology and equipment, etc. are still far behind developed countries, especially composite molds have not been promoted in China, composite molds in developed countries in Europe and the United States are used in aviation It has been widely used in aerospace field. [0003] At present, when manufacturing high-performance and hi...

Claims

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Application Information

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IPC IPC(8): B29C70/34B29C70/42B29C70/54
Inventor 尤洁许向彦徐鹤杨大鹏
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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