Hollow box-shaped fiber reinforcement and preparation method thereof, and preparation method of hollow box

Abstract

The invention discloses a hollow box-shaped fiber reinforcement, a preparation method thereof, and a preparation method of the hollow box. The box bottom, the box body and the cushion layer of the hollow box-shaped fiber reinforcement are all woven in one piece, and the side walls of the box will not be scattered. ; The connection of the bottom of the box to form the first surface connection between the bottom of the box; the bottom arm and the bottom of the box are formed, and the surface of the arm and the side wall of the box is formed. The bottom of the box forms a second surface connection with the box body. After injecting the matrix material into the prefabricated body and solidify, the strength of the side wall of the box is improved; The rigidity improves its mechanical performance; in the preparation method, the prefabricated body of the box body and the cushion prefabricated body can form a hollow channel by firing the wall of the medium or top model. There is no need to weave the hollow channel, thereby reducing the difficulty of preparation of the air box and improving its preparation accuracy.

Description

technical field

[0001] The invention belongs to the general technical field of three-dimensional weaving and manufacturing of fiber reinforced structures, and in particular relates to a hollow box-shaped fiber reinforced body, a preparation method thereof, and a preparation method of a hollow box. Background technique

[0002] At present, the preparation of high-strength and high-modulus structural parts is mostly made of composite materials. Generally, fiber preforms are prepared by weaving method first, and then injection molding matrix is ​​used to densify the fiber preforms to obtain composite structural parts. For example, the fibers can be exfoliated fibers, carbon fibers or ceramic fibers, and the matrix can be resin or carbon.

[0003] For example, Chinese patent document CN104395515B discloses a method for preparing a hollow box-shaped structural member, wherein the cross-section of the hollow box-shaped structural member is an inverted π type, and the tops of the t...