Device and method for preparing multi-scale fiber-reinforced composite materials by electrostatic filament separation

Abstract

The invention discloses a device and a method for preparing a multiscale fiber reinforced composite material through the electric wire separating method. The device comprises a rack, a forming device,an electrostatic wire separating device and a powder paving device, wherein the electrostatic wire separating device comprises a wire separating table, a first press cake and a second press cake, wherein a wire pressing groove is formed in the upper part of the wire separating table; a wire separating table through hole is coaxial with a working table through hole; two groups of wire separating grooves are formed in the two sides of the wire pressing groove and are oppositely formed in the two sides of the wire separating table through hole; each group of wire separating groove comprises a plurality of parallel wire separating grooves; the first press cake and the second press cake are hinged to the bottom surface of the wire pressing groove; the forming device comprises a forming die anda convex die coaxially arranged; and the convex die is arranged in the forming die. The device can prepare multiscale fiber composite material and can prepare continuous fiber and chopped fiber reinforced composite materials simultaneously. The preparation method and the process are continuous, rapid and efficient, and the performance features of the continuous fiber and chopper fiber reinforcedcomposite materials can be taken into account.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a device and method for preparing multi-scale fiber-reinforced composite materials by an electrostatic filament separation method. Background technique [0002] In composite materials, the reinforcement is the substance that mainly improves the mechanical properties of the matrix material, and the fiber is the most obvious and widely used type of reinforcement material. Fiber-reinforced composites are divided into continuous fiber-reinforced composites and chopped fiber-reinforced composites according to the different shapes of fibers. In the case of the same conditions as the composite matrix and the interface structure and properties of the reinforced phase, the longer the length of the continuous fiber, the higher the content. The higher the value, the more obvious the strengthening and toughening effect. However, in the actual preparation o...

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Problems solved by technology

[0003] At present, the commonly used preparation methods for preparing fiber-reinforced composite materials include slurry impregnation process, preformed blank, pressure infiltration, electrophoretic deposition molding process, direct oxidation deposition, etc., and the fiber-reinforced composite materials prepared by these preparation methods are easy Cracks and pores are generated inside the matrix, which destroys the integrity of the composite material, and it is impossible to prepare multi-scale fiber-reinforced composite materials at the same time, which restricts the purpose of achieving multi-scale directional fiber reinforcement, and cannot simultaneously take into account continuous fiber and short fiber reinforced composite materials. advantages, thereby limiting the overall performance of fiber-reinforced composites

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