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Vacuum auxiliary resin penetration process for composite material and mould therefor

A vacuum-assisted, resin-infiltrated technology, which is applied to the molding process of composite materials and the field of molds, can solve the problems of complex, uncontrollable, and high cost of the molding process, and achieve the effect of simple operation.

Inactive Publication Date: 2005-06-29
北京玻钢院复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of high cost, complex molding process, and uncontrollable problems in the technical field of composite material liquid molding, the present invention provides a new vacuum injection molding method with simple process procedures and operations, low manufacturing cost, and high molding efficiency.

Method used

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  • Vacuum auxiliary resin penetration process for composite material and mould therefor
  • Vacuum auxiliary resin penetration process for composite material and mould therefor
  • Vacuum auxiliary resin penetration process for composite material and mould therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0060] The upper mold is a glass fiber reinforced plastic soft mold, and the lower mold is a glass fiber reinforced plastic hard mold. The resin is injected through the pipeline 10, and the pipeline 3 is vacuumized. This method is suitable for products with a height less than 1.5 meters.

[0061] The specific process flow is: first clean the surface of the mold, apply 5-6 times of high-efficiency release agent, and the interval between each time is 15 minutes; evenly brush the gel coat on the upper and lower mold surfaces, after the gel coat is cured, according to the product Lay the glass fiber thickly, and lay the glass fiber outside the parting surface, pre-fix the edge of the mold with clamps, depressurize the mold by the RIV molding device to above -0.7MPa in the mold fixing vacuum circuit, so as to better fix the mold. Decompress the molding vacuum circuit to -0.2~-0.3MPa, compact the fibers, then release the vacuum of the molding vacuum circuit, and inject through the mol...

Embodiment 2

[0063] The upper mold is a FRP hard mold, the lower mold is a FRP soft mold, the resin is injected through the pipeline 3, and the mold cavity is evacuated through the pipeline 10. This method is suitable for products with a height of more than 1.5 meters. The specific implementation process is the same as the first embodiment.

Embodiment 3

[0065] The upper mold is made of FRP hard mold, and the lower mold is made of FRP soft mold. Inject from one side. At this time, inject evenly along the width of the mold cavity, and then suck from the other side. This method takes a long time to fill and is suitable for products that require both sides. Molding of products with light or complex shapes. The specific implementation process is the same as the first embodiment.

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Abstract

The invention belongs to complex material shaping technics and the moulds. The technics includes that inject the resin through the injecting system into the soft mould to expand, close the injecting port after the determined resin is all injected and evacuate the mould cavity to let the resin fills the unfilled sections at the edge so to fill the whole cavity with resin. The mould includes upper mould which is ferroglass soft mould, lower mould which is ferroglass hard mould. Injecting and shaping evacuating ports are on the upper mould while equal flow canals and shaping vacuum circuit and fixing vacuum circuit are on the lower mould. Its advantages are that it is environmental, of low cost, and is able to shaping with products of large area and thin walls.

Description

technical field [0001] The invention relates to a composite material forming process and a mold, in particular to a composite material vacuum-assisted resin infiltration process and a mold suitable for the process. Background technique [0002] Vacuum-assisted resin infiltration process (referred to as RIV, Resin Injection Vacuum) is a molding process that uses vacuum-assisted method pressure to attract resin from the injection port of the mold into the cavity. This molding process is a combination of the advantages of injection molding and vacuum forming, and is a kind of liquid molding technology for composite materials. The liquid molding technology commonly used at present is the resin transfer molding process. The upper and lower molds of this process are hard molds, and the molding process is invisible, and the filling process of the resin cannot be controlled. The patent published in 2003, publication number CN1398717A, introduced a process method for vacuum infiltra...

Claims

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Application Information

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IPC IPC(8): B29C33/00B29C70/36B29C70/48
Inventor 李新华黄再满陈淳万晓娟高国强王庆明
Owner 北京玻钢院复合材料有限公司
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