Split die vacuum bag-autoclave forming method of irregular composite material

A technology of autoclave forming and composite materials, which is applied in the field of mold-closing vacuum bag-autoclave forming of special-shaped composite materials, and achieves the effect of accurate appearance size and shape.

Inactive Publication Date: 2013-03-20
CHENGDU AIRCRAFT INDUSTRY GROUP
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Problems solved by technology

[0004] In order to solve the problem that the surface quality and shape of the non-mold surface in the prior art vacuum bag-autoclave forming process need to be supplemented by subsequent machining, grinding, painting and other processes, the present invention proposes a special-shaped composite material The pair-mold vacuum bag-autoclave forming method

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  • Split die vacuum bag-autoclave forming method of irregular composite material

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Embodiment Construction

[0016] attached figure 1 It is a structural schematic diagram of the mold-matching vacuum bag-autoclave molding method of the special-shaped composite material of the present invention. In the figure, 1 is the bottom plate, 2 is the lower mold, 3 is the upper mold, 4 is the positioning hole and the positioning pin, and 5 is the Hole isolation film, 6 is an air felt, 7 is a vacuum bag, 8 is a baffle, 9 is a sealing putty strip, and 10 is a vacuum nozzle. As can be seen from the figure, the vacuum bag-autoclave molding method of the special-shaped composite material of the present invention makes a lower mold and an upper mold according to the external dimensions and shape of the composite material part to be formed, and paves the mating surfaces of the upper and lower molds A layer of raw rubber sheet, the thickness of the raw rubber layer should ensure that the thickness of the raw rubber after vulcanization plus the height of the mold cavity is equal to the thickness of the c...

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Abstract

To solve the problems in the prior art that the surface quality and the shape of a non-adhered die plane need to be completed and accomplished through processes of mechanical machining, polishing, painting and the like in the vacuum bag-autoclave forming process, the invention provides a split die vacuum bag-autoclave forming method of irregular composite materials. A lower die and an upper die are manufactured according to the appearance size and the shape of a composite material part to be formed; a raw rubber sheet layer is paved on the split plane of the upper die and the lower die; and the thickness of the raw rubber layer meets the requirement that the sum of the rubber thickness of the vulcanized raw rubber and the height of the forming chamber of the die is equal to the thickness of the composite material part to be formed. The method has the beneficial technical effects that advantages that the vacuum bag-autoclave forming process is high in density and uniform in distribution and the die forming process is accurate in appearance size and shape are both considered.

Description

technical field [0001] The invention relates to a molding technology of special-shaped parts of composite materials, in particular to a vacuum bag-hot autoclave forming method of a special-shaped composite material. Background technique [0002] Vacuum bag-autoclave molding is a molding method widely used in composite material parts. The laid-up blanks are formed into a vacuum system by packaging, and then the low-molecular-weight volatiles contained in the prepreg are discharged by vacuuming. And the gas entrapped in the prepreg, so as to obtain a dense composite part with acceptable internal quality. Vacuum bag-autoclave molding usually uses a single-sided mold. After molding, the surface quality and shape of the molded surface are guaranteed by the mold, and the surface quality and shape of the non-moulded surface need to be determined by subsequent machining, grinding, painting and other processes. Supplement is complete. [0003] In addition, the compression molding p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/44
Inventor 冷卫红马瑞
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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