Method for increasing fiber volume content of vacuum infusion composite product

A composite material and fiber volume technology, which is applied in the field of increasing the fiber volume content of vacuum-introduced composite products, can solve the problems of low fiber volume content and high porosity, reach the level of the pull-in process, reduce porosity, and increase fiber volume content Effect

Inactive Publication Date: 2017-11-07
HENGSHEN
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Problems solved by technology

[0004] In order to solve the problems of low fiber volume content and high porosity of composite material products formed by the existing vacuum introduction process, the present invention provides a method for increasing the fiber volume content of vacuum introduction composite material products, which effectively increases the fiber volume content , reducing porosity

Method used

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  • Method for increasing fiber volume content of vacuum infusion composite product
  • Method for increasing fiber volume content of vacuum infusion composite product

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Embodiment Construction

[0016] In order to deepen the understanding of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, which are only used to explain the present invention and do not limit the protection scope of the present invention.

[0017] As shown in 1-2, the present invention is a method for increasing the fiber volume content of a vacuum-introduced composite product, the method comprising the following steps:

[0018] (1) Sprinkle a thermoplastic sizing agent on the surface of the carbon fiber fabric to make a prefabricated body;

[0019] (2) Lay the prefabricated body on the prefabricated body mold by heating and vacuum preloading. After the prefabricated body is paved and pasted, move it to the molding machine for pressurization, and then use a ziplock bag to vacuum seal; the pressurization method is repeated pressurization In order to obtain a thinner preform thickness; the calculation for...

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Abstract

The invention provides a method for increasing the fiber volume content of a vacuum infusion composite product. The method comprises the following steps of (1) applying a thermoplastic setting agent onto the surface of a carbon fiber fabric to form a preform; (2) laying the preform on a preform mold through a heating and vacuum preloading method, moving the preform to a molding press for pressurization after completion of laying of the preform and conducting vacuum sealing with a self-sealing bag after completion of pressurization; and (3) laying release cloth, a flow guide net and a vacuum bag in sequence on the preform prepared in the step (2), and conducting glue injection through connection of a vacuum pipe. By means of the method, the fiber volume content of the composite product formed through a liquid forming process is increased, the porosity is reduced, and the level of the liquid forming process and an autoclave molding process is further improved. A thought is provided for application of liquid forming in the high-end field, especially the aviation and aerospace field.

Description

technical field [0001] The invention relates to a method for increasing the fiber volume content of vacuum-introduced composite material products. Background technique [0002] Composite material is a new type of material composed of matrix and reinforcing materials. For fiber-reinforced composites, the matrix is ​​generally a resin, and the reinforcement is a fiber. The role of the fiber is mainly to provide the mechanical requirements of the composite material to meet the load-bearing capacity of the entire composite material part, and the role of the resin is to transmit the load. Therefore, the higher the volume content of fibers in the composite material, the stronger the load-bearing capacity of the part. The volume content of traditional vacuum-introduced composite products mostly does not exceed 55%, which is about 5 percentage points lower than that of the autoclave process. [0003] The vacuum infusion process is a low-cost liquid molding process for composite m...

Claims

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Application Information

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IPC IPC(8): B29C70/44
CPCB29C70/44
Inventor 卜祥威舒巍陈永乐万里程
Owner HENGSHEN
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