Forming method of three-dimensional hollow composite material

Abstract

The invention discloses a forming method of a three-dimensional hollow composite material. The forming method of the three-dimensional hollow composite material comprises the following steps: (1) dividing a flow guide forming area to form at least two flow guide areas; (2) paving three-dimensional hollow fabric, and enabling at least one of the opposite two ends of the three-dimensional hollow fabric of the adjacent two flow guide areas to bend upwards to form a bending part to form an area dividing channel; (3) performing vacuum flow guide on each flow guide area and completing; (4) paving alower connecting layer on the lower surface of the three-dimensional hollow fabric, and unfolding and flattening the bending part to form a seamless shape; (5) paving an upper connecting layer on theupper surface of the three-dimensional hollow fabric; and (6) infiltrating the upper connecting layer by resin and curing. The product can perform one-time formation without secondary repairing, so that flat transition and no thickness difference of the composite material after forming are guaranteed and the strength of the composite material is guaranteed; most importantly, the electric stabilityof the product can be guaranteed; furthermore, the forming method of the three-dimensional hollow composite material is simple to operate and time-saving, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a forming method of a three-dimensional hollow composite material. Background technique [0002] The three-dimensional hollow fabric is a new type of sandwich material. The basis of the sandwich structure is the warp and weft yarns that constitute the surface layer of the hollow fabric and the Z-direction fibers that form the core of the two continuous surface layers. Make the fabric have good structural stability. The three-dimensional hollow composite material composed of hollow fabric and resin overcomes the shortcomings of easy delamination and poor impact resistance of traditional honeycomb and foam core materials, and has the advantages of strong designability, filling and pre-embedding, and Good thermal insulation, heat insulation, and sound insulation effects have been widely used in rail transit, vehicle shelters, building materials, and communications. ...

AI Technical Summary

Problems solved by technology

However, for large-sized products, in the process of vacuum infusion molding, when one-time molding is used, the requirements for equipment are higher, and the resin must have a longer operating time, resulting in a longer infusion time, and the production efficiency cannot be effectively improved.

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