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

A fiber-reinforced, hollow technology, applied to textiles, papermaking, textiles, fabrics, etc., can solve problems such as poor mechanical properties, low rigidity of hollow box-shaped structural parts, scattered top and box body, etc., to achieve firm connection and improve Mechanical properties, the effect of improving stiffness

Active Publication Date: 2022-07-12
NANJING FIBERGLASS RES & DESIGN INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is that the box top and the box body of the existing hollow box-shaped fiber reinforced body are prone to fall apart. Affects the low stiffness and poor mechanical properties of hollow box-shaped structural parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] This embodiment provides a hollow box-shaped fiber reinforcement, such as figure 1 As shown, the first embodiment of the hollow box-shaped fiber reinforcement includes an integrally woven box bottom, an integrally woven box body and a woven cushion; the box body includes a box top 23, which is bent from both sides of the box top 23 The two side walls 22 extending downwards are folded, and the connecting portion 21 which is bent outward from the side of any side wall 22 close to the bottom of the box.

[0069] The middle part of the upper surface of the bottom of the box is woven with a ladder 33 protruding upward, and the connecting part 21 is laminated on the bottom of the box, and is located outside the side wall 22 of the ladder 33 adjacent to it, between the box body and the bottom of the box. A hollow channel is formed; along the length direction of the box body, an open end is formed between the head of the box body and the head of the box bottom; the cushion laye...

Embodiment 2

[0105] This embodiment provides a hollow box-shaped fiber reinforcement, which is different from the hollow box-shaped fiber reinforcement provided in Example 1 in that:

[0106] The step 33 at the bottom of the hollow box-shaped fiber reinforcement is replaced with a downwardly concave groove (not shown in the figure), the bottom arm 42 of the cushion layer is laminated and attached to the groove bottom of the groove, and the reinforcing arm abuts On the groove wall of the groove and the inner wall surface of the side wall of the box. Therefore, the thickness of the bottom of the box can be changed by setting the groove or the ladder, so that the thickness of the bottom of the box can be changed according to the requirements.

[0107] Correspondingly, in the preparation method of the hollow box-shaped fiber reinforcement in this embodiment, the weaving method of the groove is the same as the weaving method of the terrace, and the boundary line of the surrounding edge of the g...

Embodiment 3

[0112] This embodiment provides a hollow box-shaped fiber reinforcement, which is different from the hollow box-shaped fiber reinforcement provided in Example 1 in that:

[0113]The box bottom of the hollow box-shaped fiber reinforced body is not provided with the above-mentioned steps 33, the box bottom is flat, and the bottom arm 42 of the cushion layer is laminated and attached to the box bottom.

[0114] In the hollow box-shaped fiber reinforcement of this structure, the box bottom is a flat block, and the connecting part 21 of the bottom of the box body still forms a first surface contact with the box bottom; 22 forms a surface abutment, a surface abutment is formed between the bottom arm of the cushion layer and the box bottom, and a second surface abutment is formed between the side wall 22 of the box and the box bottom through the cushion layer, and the matrix material is in a hollow box shape. After the fiber reinforcement is cured in vivo, the stiffness and mechanica...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D03D25/00
CPCD03D25/005
Inventor 周海丽周峰王昆张媛媛张立泉王婧孙煜刘强李超
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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