JPS6297938A - Method for weaving fabric for three-dimensional molding - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for weaving a fabric for three-dimensional forming suitable as a fiber material for reinforcing composite materials. It is expanded into the shape of a long material such as T-shape, H-shape, 0-shape, mouth-shape, etc. and is attached to a mold, and is integrated with matrix resin etc. by pressure injecting it into this mold. It is used for aircraft frames, mechanical parts, building structural materials, etc. It can also be molded with prepreg yarn impregnated with resin and formed into a composite material simply by applying heat.

(Prior art) Japanese Patent Application Laid-open No. 58-870 as a method for manufacturing three-dimensional fabrics for reinforcing composite materials
Publication No. 42 discloses that two or more woven fabrics made of reinforcing fibers are held together in part by binding yarns or stitching yarns of the reinforcing fibers, and other parts can be expanded into two or more fabrics. It is disclosed that the materials are laminated in this manner.

Furthermore, in Japanese Patent Application Laid-Open No. 57-133241, two or more layers of warp yarns are provided in at least one side of the weaving width direction, and one end of the warp yarns is arranged so as to be adjacent to the remaining warp yarn group of one layer, and two or more layers A method for weaving is disclosed in which separate weft threads are inserted into each warp group to connect one end of two or more warp threads to one warp group.

(Problems to be Solved by the Invention) The method described in Japanese Patent Application Laid-open No. 58-87042 involves laminating a plurality of woven fabrics made of reinforcing fibers and integrating them with binding yarn or stitching yarn. Therefore, the total number of layers of fabric is always equal in the expanded part and the integrated part,
This cannot be differentiated, which limits its uses, and since they are integrated with stitch threads, the number of man-hours increases and productivity decreases. There was a problem with the weft thread being cut.

Furthermore, the method described in JP-A No. 57-133241 involves weaving two upper and lower single-layer fabrics using two or more layers of warp threads, and then weaving one single-layer fabric using a group of adjacent single-layer warp threads. Because each layer of fabric is thin, and the warp and weft yarns are woven by bending each other, it is a crimp fabric that stretches easily and cannot take full advantage of the yarn strength, which limits its uses. It had been.

This invention has the following advantages: 1. By using a conventional multi-layer loom with or without strings, the thickness of the non-separable part separated into upper and lower two layers, the non-separable part, and the joint part adjacent to these can be made thicker, and the thickness can be adjusted to an arbitrary thickness. This allows for three-dimensional molding fabrics to be obtained in one step, and there is no need for stitching using a sewing machine or the like.
In addition, the present invention provides a method for manufacturing a fabric for three-dimensional forming, which allows the yarn used to fully demonstrate its strength.

(Means for solving the problem) A multi-layered fabric having a non-separable part and a non-separable part separated into two upper and lower parts in at least a part of the width direction, and the remaining part forming an integral joint part. In weaving, the core warp yarn and warp yarn are arranged in each of the non-separable parts, non-separable parts and joint parts, and the upper half of the joint part and the non-separable part are placed in the upper weft insertion device using a multilayer loom. Then, the lower half of the joint and the non-separable part are woven using the lower weft inserting device, and the weft thread is inserted twice or more into each of the non-separable part, the non-separable part and the joint part to make the non-separable part. Tighten each of the weft threads in the separated part, non-separated part, and joined part individually with the warp threads.

(Function) Each of the non-separable portion, the non-separable portion, and the joint portion is woven into a multilayer weft with two or more wefts using a core warp yarn, two or more weft yarns, and a tightened warp yarn. In this case, since the core warp yarn is taut, the upper and lower weft yarns of the straight core warp yarn are overlapped in parallel, and the double or more weft yarns that overlap above and below are tightened by the warp yarn, and this tightening causes the core warp yarn to , the weft and warp threads are integrated.

Further, the upper layer portion consisting of the non-separable portion and the upper half of the joint is placed in the weft by the upper side weft insertion device, and the lower layer portion consisting of the non-separable portion and the lower half of the joint is placed in the lower weft insertion device. Since the weft is inserted by a device, the upper layer portion and the lower layer portion are not connected by the weft threads, but only by the tightening warp threads at the joint. Therefore, if the upper and lower separating parts are located at the ends in the width direction, no matter what kind of tissue is selected for the upper and lower layer parts, the upper and lower separating parts will not be connected at the ears and will be separated. be done.

The fibers used include carbon fibers, glass fibers, aromatic polyamide fibers (product names such as ``Kevlar'' and ``Rnomex''), silicon carbide fibers, polyimide fibers, and polyether fibers, which are used as reinforcing fibers for composite materials. Either ether ketone fiber or polyester fiber may be used. In addition, so-called prepreg yarns in which these fibers are pre-impregnated with resin can also be used.

(Example) A case where a multi-layer loom (multi-layer loom) is used will be described. As shown in FIG. 1, FIG. 2, and FIG. 3, the three-dimensional molding fabric of Example 1 has non-separable parts A and non-separable parts B at both ends in the width direction, and a joint part C in the center. was woven. That is, the core warp yarn 1 is divided into upper and lower four layers, and each layer is opened by four belt frames (not shown).

In the non-separable part A, the non-separable part B and the joint part C, two each of the tightened warp threads 2a, 2b and 2c are arranged between the two core warp threads 1.1 which are adjacent to each other in the width direction. The tightened warp yarns 2a, the tightened warp yarns 2b of the non-separable portion B, and the tightened warp yarns 2c of the joint portion are each opened by two belt frames, a total of six belt frames. First, non-separable part A
and one warp yarn 2 of each of the two sets at the joint C.
a and 2c and all other warp threads 2a, 2
b, 2c is lowered, and the uppermost weft thread 3-1 (see Fig. 4) is wefted in the direction of the arrow using the shirt handle (not shown) in the upper drawer box, and then the first core warp thread from the top is inserted. 1 and insert the second tier weft thread 3-2 into the weft, then raise the second core warp thread 1 from the top and insert the third tier weft thread 3-3 into the weft, and then Raise the other tightened warp yarn 2a of the non-separable part A and one tightened warp thread 2b of the non-separable part B, replace the whistle,
Insert the weft thread 3-4 of the first row (fourth row in total) using the shirt handle of the lower string, and then raise the third core warp thread 1 from the top to create the weft thread 3-5 for the fifth row in total. , the fourth core warp yarn l from the top is raised, and only the other tightened warp yarn 2b of the non-separable part B and the other tightened warp thread 2c of the joined part C are lowered, making a total of 6 steps. Insert the weft threads 3-6 into the wefts. Next, replace the positions of the two sets of warp threads 2b, 2b in the non-separable part B and the two sets of warp threads 2c, 2c in the joint part C, and insert the weft threads 3-6 from the bottom. Insert the weft yarn 3-7 in the row, and then lower the core warp yarn 1, tightened warp yarns 2b, and 2a in order to create the weft yarn 3-8, 3-9.
．． 3-10.3-11.3-12 are inserted horizontally. In addition, in FIGS. 1 to 3, the total number of weft threads is indicated by "r3", and the numbers indicating the order of weft insertion are omitted. Furthermore, it goes without saying that punching is required for each width insertion described above. The obtained three-dimensional molding fabric is expanded into an H-shaped cross section (see FIG. 5) by expanding the left and right non-separable portions A and B, and is used as a composite material reinforcing fabric.

Next, three-dimensional molding fabrics of Example 2 shown in FIGS. 6, 7, and 8 were woven. In this Example 2, Example 1
Similarly, upper and lower separation parts A and B are formed at both left and right ends, and a joint part C is formed in the center, but the thickness of the joint part C is thinner than the total thickness of the upper and lower separation parts A and B. That is,
The core warp threads 11 of the non-separable portion A on the left side, the lower separable portion B, and the joint portion C1 in the center and the non-separable portion A and the non-separable portion B on the right side are respectively opened by separate belt frames. That is, all the core warp yarns 11 are opened by a total of five belt frames. On the other hand, in each of the upper separation part A, the lower separation part B, and the joint part C, the warp threads 12a are tightened between the adjacent core warp threads 11.
, 12b, and 12c are arranged one each,
Divide the tightening warp threads 12a, 12b, and 12c of each part into two sets, and connect the adjacent warp threads 12a.

12b and 12c are moved in opposite directions. In other words, tighten the warp threads 12a of the left and right non-separable parts A by 2
Tighten the warp threads 12b of the left and right non-separable parts B with two belt frames.
Using two belt frames, tighten the warp thread 1 at joint C.
Open 2c with two belt frames and tighten the warp threads 12a,
12b and 12c are opened with a total of 10 belt frames. for example,! & At first, only one tightened warp thread 12a of the left non-separable part A is raised, and the remaining tightened warp thread 12a
, 12b, 12c and the core/warp thread 11 are all lowered, and the first weft thread 13-1 (see Fig. 9) is inserted from right to left into only the left non-separable part A, and then the second weft thread is inserted into the left non-separable part A. One tightened warp yarn 12a of separated section A, core warp yarn 11, one tightened warp yarn 12c of joint section C, and one tightened warp yarn 12a and core warp yarn 1 of non-separable section A on the right side.
1, respectively, to weave the second weft thread 13-2 across its entire width, and third, raise only one of the warp threads 12a of the upper right separation section A, and the remaining warp threads 12a,
12b, 12c and the core warp threads 11 are all lowered, and the third weft thread 13-3 is inserted into the weft.Fourth, only the tightened warp thread 12a that had been lowered in the upper right separation section A is raised, and the remaining tightened warp threads are lowered. 12a, 12b, 12c and the core warp yarn 11 are all lowered, and the fourth weft yarn 13-4 is wefted only into the upper right separation section A.

Next, replace the shuttlecock, and fifthly replace the right upper separation part B.
5th weft 13-5 is wefted only to the left and right non-separated parts B, 6th weft 13-6 is wefted to the entire width spanning the left and right non-separated parts B, and 7th weft is inserted only to the right upper separated part B. 1
Insert the weft thread 3-7, and further insert the eighth weft thread 13- on the rear side.
Add 8. After that, replace the shirt bolt again, and apply the ninth weft thread 13 to the entire width spanning the left and right non-separable parts A.
-9, then weft the 10th weft 13-1o into the left upper separation part A, and on the rear side, the first weft 13-1, the second weft 13-2, and the third weft 3 -3
Similarly to the fourth weft 13-4, the 11th to 14th wefts (not shown) are wefted in order. and,
Replace the shirt handle again, insert the 15th weft 13-15 spanning the left and right non-separable parts B, the 16th weft 13-16 of the right upper separated part B, and then insert the 5th weft 13-5 on the rear side. , 6th weft 13-6, 7th weft 1
3-7 and the 8th weft 13-8 as well as the 17th to 2nd wefts.
A zero weft (not shown) is inserted into the weft in order, and this is then wound. The obtained fabric is expanded into an H-shape (see Figure 1o) as in Example 1, but since the joint C is thinner, processing becomes easier.

Figure 11 shows the fabric for three-dimensional molding of Example 3 in which wide upper and lower separation parts A and B and narrow joint parts C were made alternately, and the upper and lower separation parts A and B were expanded. By doing so, the first
As shown in Figure 2, the cross section is shaped like a spectacle. 1st
Embodiment 4 shown in FIG. 3 differs from Embodiment 3 in FIG. This is what I did. Embodiment 5 in FIG. 14 has separation parts A and B.
is formed only on one side in the width direction, and by expanding the one-separated portions A and B, a T-shaped cross section is formed.

Furthermore, in the sixth embodiment shown in FIG. 15, relatively narrow non-separated portions A and relatively wide non-separated portions B are formed on both the left and right sides, and the cross section is formed into a π-shape by expanding the separated portions A and B. It is something that

In the above embodiments, a no-thread loom can be used,
For example, when weaving a fabric having the shape shown in Fig. 6 on a no-thread loom, wefting is carried out in order in the same way as for conventional multilayer fabrics, and instead of being held by the tightening warp threads 1.2c of the central joint C, The floating weft threads 13 are cut and removed after weaving. In addition, the weft ends of both ears are held by appropriate means.

(Effect of the invention) In this invention, the non-separable portion, the non-separable portion, and the joint portion are all woven using core warp yarns, tightened warp yarns, and double or more weft yarns, so that the core warp yarns are straight in the resulting fabric. The non-separable portion, the non-separable portion, and the joint portion are each connected by tightening warp threads, so that delamination does not occur. Then, the L layer part and the lower layer part can be inserted horizontally using separate shuttle bolts, and the thickness of the non-separable part, the non-separable part and the joint part can be set to the desired structure, number of laminated layers, thickness, and density, respectively. The loom used may be a conventional multilayer loom, either spun or unbraided, and can be efficiently produced in a wide range of sizes.

[Brief explanation of drawings]

1 is a cross-sectional view of Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view of Embodiment 1 of the present invention.
3 is a sectional view taken along the line ■-■ of FIG. 1, FIG. 4 is an explanatory diagram of the horizontal insertion order of Example 1, and FIG. FIG. 6 is a cross-sectional view of the second embodiment, FIG. 7 is a cross-sectional view taken along the line ■-■ in FIG. 6, FIG. 8 is a plan view of the right half of FIG. 6, and FIG. 9 is a cross-sectional view of the second embodiment. Explanatory diagram of horizontal insertion order, 1st O
The figure is a cross-sectional view after expansion, FIG. 11 is a cross-sectional view of Example 3, FIG. 12 is a cross-sectional view after expansion, and FIG. 13 is a cross-sectional view of Example 4 after molding. FIG. 14 is a cross-sectional view of Example 5, and FIG. 15 is a cross-sectional view of Example 6. A: "Bi-separated part, B: Lower separated part, C: Joint part, ■, 11
: Core warp yarn, 2a, 2b, 2c, 12a-12b, 1
2c: Tightening warp thread, 3.3-1 to 3-12.13.1
3-1 to 13-12: Weft. Patent applicant Shikishima Canvas Co., Ltd. Agent Patent attorney Takeshi Sakano Misspoken words 1) Tsukasa Ryo Figure 1 Figure 6 Figure 1 Heel

Claims (1)

[Scope of Claims] [1] Weaving a multi-layered fabric that has an upper and lower separated part separated into two upper and lower parts in at least a part of the width direction, and the remaining part forms an integral joint part. In order to do this, the core warp yarns and warp yarns are arranged in each of the above-mentioned upper separated part, lower separated part and joined part, and the upper half of the joined part and the upper separated part are placed in the upper weft insertion device using a multilayer loom. In addition, the lower half of the joined part and the lower separated part are woven by the lower weft inserting device, and the weft threads are inserted twice or more into each of the upper separated part, the lower separated part, and the joined part, and the upper separated part is weaved. A method for weaving a fabric for three-dimensional forming, characterized in that each weft yarn in the section, lower separation section, and joint section is individually tightened with warp yarns. [2] The method of weaving a fabric for three-dimensional forming according to claim 1, wherein an upper separating part and a lower separating part are formed on both left and right sides in the width direction, and a joint part is formed in the center. [3] The method for weaving a fabric for three-dimensional forming according to claim 1, wherein an upper separation part and a lower separation part are formed on one side in the width direction, and a joint part is formed in the remaining part. [4] The method for weaving a fabric for three-dimensional forming according to any one of claims 1 to 3, wherein the number of overlapping weft yarns is equal across the entire width, and the number of overlapping weft yarns in the upper separation part and the lower separation part are equal to each other. [5] Three-dimensional molding according to any one of claims 1 to 3, in which the number of overlapping weft threads in the upper separation part and the lower separation part is equal, and the number of overlapped weft threads in the joint part is smaller than the total number of weft threads in the upper separation part and the lower separation part. Method of weaving textiles. [6] The method for weaving a fabric for three-dimensional forming according to claim 1, 4, or 5, wherein the upper and lower separating parts and joining parts are formed alternately in the width direction.