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Liquid pressure forming method of composite material

A technology of liquid pressure and composite materials, which is applied in the field of liquid molding of resin-based composite materials, can solve problems such as molding difficulties, and achieve the effects of large fiber volume content, high dimensional accuracy, and easy paving.

Active Publication Date: 2015-05-06
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the requirements for the fiber volume content of the parts increase, the requirements for the resin viscosity, injection pressure and mold structure are also getting higher and higher. Although the RTM can be improved by reducing the resin viscosity, improving the mold structure, and increasing the injection pressure, etc. The molding efficiency of the technology and the molding quality of the parts, but it is difficult to mold for high-performance composite structural parts with a fiber volume content greater than 55%

Method used

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  • Liquid pressure forming method of composite material
  • Liquid pressure forming method of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] The prefabricated fabric 3 is a composite laminate structure, the material system is CF3031 / BA9914LPM, and the fiber volume content of the material is 58%±3%; CF3031 is a T300 grade carbon fiber fabric with a specification of 3K produced by Shandong Weihai Development Company, and BA9914LPM resin It is a special resin developed for the liquid molding process by AVIC Composite Materials Co., Ltd. The external dimensions of the parts are: 500mm×500mm×3.65mm (length×width×thickness), and the cavity size of the forming mold is: 600mm×600mm×3.65mm (Length × width × thickness), the design requires the tolerance range of part thickness to be ±6%, and the fiber volume content to be 58%±3%. System layout such as figure 1 .

[0087] 1. Place the laid-up pre-formed body 3 in the middle of the cavity 6 of the lower half-mold 5, and the predetermined pre-formed body 3 is 50 mm away from the edge around the cavity 6 of the lower half-mold 5;

[0088] 2. Put the sealing strip 8 in t...

Embodiment 2

[0108] Carry out as described in Example 1, the difference between Example 2 and Example 1 is that the material system in Example 2 is T800 / BA9918LPM, and the fiber volume content of the material is 60%±3%. Among them, T800 is the 12K T800 carbon fiber produced by Toray Corporation of Japan, and BA9918LPM resin is a special resin developed by AVIC Composite Materials Co., Ltd. for the liquid molding process. The external dimensions of the parts are 1000mm×800mm×2.8mm (length×width) ×thickness), the mold cavity size of the mold is 1200mm×1000mm×2.8mm (length×width×thickness); the design requires the tolerance range of part thickness to be ±6%, and the fiber volume content to be 60%±3%. System layout such as figure 1 shown.

[0109] 1. Place the laid-up pre-formed body 3 in the middle of the cavity 6 of the lower half-mold 5, and the predetermined pre-formed body 3 is 100mm away from the edge around the cavity 6 of the lower half-mold 5;

[0110] 2. Put the sealing strip 8 in ...

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Abstract

The invention belongs to a resin based composite material liquid forming technique, and relates to a composite material liquid pressure forming method. The periphery of a predetermined mold body is filled with resin, and the predetermined mold body is continuously pressurized and cured successively by resin via a first pressure source and a second pressure source. According to the invention, the predetermined mold body is pressurized and cured continuously by resin; a molded composite material product not only has high fiber volume content equivalent to a composite material molded by a prepreg / autoclave technique, but also has the high precision equal to the composite material molded by an RTM technique; the applicable range of the composite material molded by a liquid forming technique is expanded; the molding efficiency is improved obviously; the manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the liquid forming technology of resin-based composite materials, and relates to a method for liquid pressure forming of composite materials. Background technique [0002] Carbon fiber reinforced resin-based composite materials have unique advantages such as light weight, high specific strength, high specific modulus, good fatigue fracture resistance, corrosion resistance, and easy large-area integral forming. The amount of key materials used in equipment has also become one of the symbols of the advanced nature of aviation equipment. [0003] Composite parts formed by prepreg / autoclave technology have the characteristics of high fiber volume content, high fiber consistency and high mechanical properties, and are suitable for most composite material structures, so they are currently widely used in advanced aircraft One of the forming process methods on composite material structure. However, the prepreg / autoclave technology us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/42
CPCB29C70/44
Inventor 赵龙黄峰孙占红刘强
Owner AVIC COMPOSITES
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