Vacuum-assisted forming device and process for composite

Abstract

The invention provides a vacuum-assisted forming device and process for a composite. The device comprises fiber cloth arranged on a mold. Demolding cloth, a diversion net and a vacuum bag film are sequentially laid on the fiber cloth from inside to outside. A feeding pipe and a discharging pipe are arranged on the vacuum bag film. The discharging pipe is provided with equipment for vacuumizing. A sealing strip is used for sealing the vacuum bag film. The diversion net is laid in a segmented manner. A relay feeding pipe is laid between every two adjacent diversion net bodies. The vacuum-assisted forming device has the beneficial effects that a gradient gradual relay feeding method and transition gradient receiving pipes are designed, the diversion net disconnection manner is adopted in layout, and synchronous feeding is guaranteed; and through the relay forming, the limit by the forming size of products is avoided, and large products can be manufactured by the adoption of the vacuum forming process.

Description

technical field [0001] The invention relates to a vacuum-assisted forming device for composite materials. Background technique [0002] At present, more and more fiber-reinforced resin composite materials are used in vacuum-assisted molding. Since the entire process only needs equipment that can provide -0.08~ -0.1Mpa, the infiltration and curing of the resin can be completed during the vacuum-assisted molding process, and there is no need for an autoclave, RTM equipment and molds with huge investment costs. It has the advantages of low manufacturing cost, high molding efficiency, low porosity and high strength. [0003] During vacuum introduction molding: [0004] 1) When the fiber span, thickness, and structure of the surface layer are different, the feeding speed of the vacuum adsorption resin is uneven, which may easily lead to local areas. The resin is first sucked to the end of the discharge pipe, forming a turn-up and dead angle, resulting in insufficient infiltrati...

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Problems solved by technology

[0004] 1) When the fiber span, thickness, and structure of the surface layer are different, the feeding speed of the vacuum adsorption resin is uneven, which may easily lead to local areas. The resin is first sucked to the end of the discharge pipe, forming a turn-up and dead angle, resulting in insufficient infiltration of the local dry area. through;

[0005] 2) When the span is large, when the resin infiltrates from one end to the other end, it will go through heavy resistance such as fiber cloth, the adsorption force is too small, and the diversion is too slow, which is not conducive to operation

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