JPH0562580B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a cross-shaped composite structure.

[Conventional technology]

FIG. 4 is a perspective view of a mold for a conventional cross-shaped composite joint structure, and FIG. 5 is a perspective view of a split mold.
FIG. 6 is a perspective view of the composite joint structure. In the figure, numeral 1 denotes a molding die, which consists of four divided dies 2 divided into a square shape. Reference numeral 3 denotes an L-shaped cavity formed on the opposing surface of this split mold 2, and the four split molds 2 form a cross shape. 4 is a prepreg (or resin-impregnated cloth cloth) laminated on the cavity 3, 5 is a manufactured cross-shaped composite joint structure, and 6 is a laminate plate.

In the conventional manufacturing method of a composite joint structure, as shown in Fig. 5, prepreg 4 is laminated in the cavity 3 of each split mold 2, and the four prepregs are combined to form a mold 1 as shown in Fig. 4. The prepreg 4 is cured in this state to produce a cross-shaped composite joint structure 5 to which the L-shaped laminates 6 are joined.

[Problem that the invention seeks to solve]

In the conventional method for manufacturing a composite joint structure as described above, since the fibers of the composite joint structure 5 are not continuous in the tensile load direction, when a tensile load is applied, the interface between the cloth cloths There was a problem that peeling occurred.

This invention was made to solve the above-mentioned problems, and provides a composite material structure in which fibers are alternately continuous in a cross shape and can produce a cross-shaped composite material structure that is difficult to peel. The purpose is to obtain a manufacturing method for.

[Means for solving problems]

A method for manufacturing a composite material structure according to the present invention is a method for manufacturing a cross-shaped composite material structure in which resin-impregnated fiber bundles or prepreg rovings are laminated in a crosswise manner. This method involves forming and curing fibers in a continuous state.

[Effect]

In the method for manufacturing a composite structure of the present invention, bundles of resin-impregnated fibers or prepreg rovings are laminated in a crosswise manner, formed with the fibers continuous in the cross direction, and cured. A cross-shaped composite structure is manufactured using the following steps.

In the composite joint structure manufactured in this way, since the fibers are continuous in the cross direction, peeling does not occur.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially omitted perspective view of a mold showing an embodiment of the present invention, and FIG. 2 is a perspective view of a manufactured composite joint structure. The same reference numerals indicate the same or equivalent parts. The split mold 2 is formed into a cube or a rectangular parallelepiped, and is placed on a base 7 to form a cross-shaped cavity 3 to form the mold 1. 8
is a resin-impregnated fiber bundle or prepreg roving.

As shown in Fig. 1, the method for manufacturing a composite joint structure is to alternately insert bundles of resin-impregnated fibers or rovings 8, which have been made into prepreg in advance, into a cavity 3 of a mold 1, one bundle at a time. The composite material joint structure 5 as shown in FIG. 2 is manufactured by stacking the fibers at equal intervals so as to intersect with each other, forming the fibers into a cross shape with continuous fibers in the cross direction, and curing the fibers.

In the composite joint structure 5 manufactured as described above, the fibers are continuous over the entire length in the cross direction, so no peeling occurs.

In addition, in the above embodiment, a laminate plate 6 may be bonded to the outside in order to increase shear rigidity and shear strength.

FIG. 3 shows an embodiment in which a cloth cloth is attached to the outside, and the laminate 6 has prepreg 4 on both sides of a resin-impregnated fiber bundle or prepreg roving 8, as in the conventional one. It is formed by laminating and curing.

Note that although the above embodiments relate to composite joint structures, the present invention can also be applied to other composite material structures. Further, in the above embodiment, the rovings 8 are laminated one bundle at a time so as to alternately intersect at equal intervals, but the rovings are not limited to this, and may be intersected in any order.

〔Effect of the invention〕

As explained above, in this invention, bundles of fibers impregnated with resin or prepreg rovings are laminated in a crosswise manner, so that the fibers can be made continuous in the cross direction, thereby causing peeling. This has the effect of making it possible to easily manufacture difficult composite structures.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted perspective view of a mold showing an embodiment of the present invention, Fig. 2 is a perspective view of a composite joint structure manufactured according to the embodiment, and Fig. 3 is a perspective view of a composite joint structure manufactured according to the embodiment. A perspective view showing a composite material joint structure manufactured according to an example, FIG. 4 is a perspective view showing a conventional mold,
FIG. 5 is a perspective view showing the split type, and FIG. 6 is a perspective view of a composite joint structure manufactured by a conventional method. In each figure, the same reference numerals indicate the same or equivalent parts, 1 is the mold, 2 is the split mold, 3 is the cavity,
4 is a prepreg, 5 is a composite joint structure, 6 is a laminate, and 8 is a resin-impregnated fiber bundle or prepreg roving.

Claims (1)

[Claims] 1. A method for manufacturing a cross-shaped composite structure, in which bundles of resin-impregnated fibers or prepreg rovings are laminated in a crosswise manner, and the fibers are continuous in the crosswise direction. A method for manufacturing a composite material structure, characterized by forming and curing the composite material structure. 2 In a method for manufacturing a cross-shaped composite material structure, bundles of resin-impregnated fibers or prepreg rovings are laminated in a crosswise manner, and after the fibers are continuous in the cross direction, a laminate is bonded to the outside. A method for manufacturing a composite material structure, which comprises curing the composite material structure.