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Vacuum assisted resin injection process for preparing fiber composite material

A technology of vacuum introduction molding and fiber composite materials, which is applied in the field of vacuum introduction molding technology of fiber materials, which can solve the problems affecting the apparent quality and performance, and achieve the effect of increasing the channel of the suction port, avoiding defects, and reducing resin outflow

Inactive Publication Date: 2015-12-02
HENGSHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When center point or line injection is used, indentation will be formed at the position of the injection pipe or the injection seat, which will affect the apparent quality and performance

Method used

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  • Vacuum assisted resin injection process for preparing fiber composite material
  • Vacuum assisted resin injection process for preparing fiber composite material
  • Vacuum assisted resin injection process for preparing fiber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Such as figure 1 , this embodiment is to provide a vacuum introduction molding process for the preparation of fiber composite materials using central point injection. A fiber preform 2 is laid on the mold 1, a release cloth 3 is provided on the fiber preform 2, and a flow guide is provided on the release cloth 3. The net 4 and the diversion net 4 are provided with a rubber injection pipe 5, the lower end of the rubber injection pipe 5 is provided with a glue injection seat 6, and a flexible material 7 is laid under the glue injection seat 6, and finally a vacuum bag 8 is laid on the mold 1 to remove the fiber prefabricated body 2, The mold cloth 3, the diversion net 4 and the glue injection port of the injection pipe 5 are wrapped, and at the air suction port on one side of the vacuum bag 8, the release cloth 3 is wrapped with a layer ...

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PUM

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Abstract

The invention discloses a vacuum assisted resin injection process for preparing a fiber composite material. When a center point injection mode is adopted, a plurality of layers of soft materials are laid under a glue injection seat; when a linear injection mode is adopted, a pipeline is laid among products for reducing the distance of a flowing channel, a glue guide pipe is wrapped with a flow guide net for preventing the glue guide pipe from making indentations on the surfaces of the products, the glue guide pipe is separated from the surface of a prefabricated part, direct contact is avoided, and the height between the glue guide pipe and the prefabricated part is approximately 10-50 mm; at an extracting opening, a layer of narrow strong-core felt strip wrapped with demolding cloth serves as a gas guide channel, the gas guide channel is also separated from the edge of the prefabricated body, and the height between the gas guide channel and the prefabricated body is approximately 50-100 mm. By means of the process, resin glue volume and bubbles in laminated plates can be reduced, and the voidage is reduced.

Description

technical field [0001] The invention relates to a vacuum introduction forming process for fiber materials. Background technique [0002] Vacuum Assisted Resin Injection (VARI for short) is a low-cost process for preparing composite materials. "Dry" reinforcement materials (glass fiber, carbon fiber, sandwich materials, etc.) Vacuum, forming a negative pressure in the mold cavity, using the pressure generated by the vacuum to press the resin into the fiber layer through the pre-laid pipeline, so that the resin infiltrates the reinforcing material and finally fills the entire mold to obtain the desired product. In the process of adopting this process, an important factor affecting the performance and appearance quality of the product is whether the layout of various auxiliary materials on the prefabricated fiber is reasonable. The role of the diversion net is to speed up the diversion speed of the resin. The resin diversion time is of guiding significance for the selection of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34
CPCB29C70/342
Inventor 谭雪林叶珍珍李四杰舒巍吕兆坤
Owner HENGSHEN
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