JP2004353147A - Method for producing fabric and method for producing fiber-reinforced resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for capable of producing a very thin flat fabric having small so-called textures formed by warp and weft yarns as small as possible and also capable of producing a good fiber-reinforced resin by using the flat fabric, and a method for producing the fiber-reinforced resin. <P>SOLUTION: This method for producing the fabric is provided by lifting up and down weft yarns 1 of a prescribed number, while holding warp yarns 2 at a warp yarn-holding body 6, introducing the warp yarns 2 into and out a gap 5 between the upper and lower weft yarns 1 and formed by lifting up and down of the weft yarns 1 by introducing the warp yarn-holding body 6 into and out the gap, repeating the above to weave a fabric 4 consisting of the weft yarns 1 and warp yarns 2, and also flat-treating the warp yarns 2 in a tension free state just before the introduction of the warp yarns 2 into and out the gap 5 to make flat warp yarns 3 and introducing the warp yarn-holding body 6 holding the flat warp yarns 3 in a state of maintaining the flat state and held on the warp yarn-holding body 6 into and out the gap 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing a woven fabric and a method for producing a fiber-reinforced resin.
[0002]
Problems to be solved by the prior art and the invention
As a woven fabric for a fiber reinforced resin (for FRP), a woven fabric that is thin and has as small an eye as possible formed by warp and weft is demanded. Such a woven fabric can be manufactured by opening a warp or a weft (by separating ultrafine fibers constituting the warp or the weft).
[0003]
This opened woven fabric is formed by weaving a warp and a weft into a woven fabric and then performing a spreading process, or by performing a spreading process on a warp or a weft, and then applying the flattening process to the flat warp and the weft. And a method of forming an opened fabric by weaving. Both the former method and the latter method have merits, and are appropriately selected according to the application.
[0004]
Meanwhile, as the latter method, there is a method disclosed in Japanese Patent No. 2836457 (hereinafter, referred to as a conventional example).
[0005]
This conventional example raises and lowers a predetermined number of flat warp yarns subjected to flattening processing, and performs flattening processing while applying a predetermined tension (tension) to a weft drawn from a bobbin using a tension device. As a flat weft, the flat weft is held in a weft holding body called a rapier, and the flat weft is drawn into and out of the gap formed by raising and lowering the flat warp, This is a technique for producing a woven fabric that is thin and has as small an eye as possible by repeating these steps.
[0006]
The present invention has found that in this conventional example, the tension acting on the weft imposes a limit on the flattening of the weft, and produces a woven fabric as thin and as small as possible that cannot be achieved by conventional methods. The present invention has been completed by establishing a method for carrying out the method.
[0007]
[Means for Solving the Problems]
The gist of the present invention will be described with reference to the accompanying drawings.
[0008]
A predetermined number of warps 1 are raised and lowered, while the weft 2 is held by a weft holding body 6, and the weft holding body 6 is led into and out of a gap 5 between the upper and lower warps 1 caused by the raising and lowering of the warp 1. A method of weaving the weft 2 into the gap 5 and repeating the above-described steps to weave the woven fabric 4 composed of the warp 1 and the weft 2, wherein the weft 2 is introduced immediately before the weft 2 is introduced into the gap 5. The flat weft 3 is subjected to a flattening process in a tension-free state, and the flat weft 3 is held in the weft holding body 6 in a state where the flat state is held, and the weft holding body 6 is guided into and out of the gap 5. And a method for producing a woven fabric.
[0009]
Further, in the method for producing a woven fabric according to claim 1, as a flattening process performed on the weft 2, a weft passing gap 7 is provided in a passage of the weft 2 and the weft 2 is passed through the weft passing gap 7 to allow the weft 2 to pass through. In which a flattening process is adopted, which is a flattening process.
[0010]
Further, in the method for producing a woven fabric according to claim 2, the weft passing gap 7 is formed between the upper and lower two plate bodies 8a and 8b. is there.
[0011]
Further, in the method for producing a woven fabric according to any one of claims 1 to 3, the weft holding body 6 is provided with a flat holding mechanism for holding the flat weft 3 and holding the flat weft 3 in a flat state. The present invention relates to a method for producing a woven fabric.
[0012]
Further, in the method for producing a woven fabric according to any one of claims 1 to 4, a pre-flattening process of pressing the weft 2 against the roller 9 is performed before the flattening of the weft 2 is performed. Pertains to the method.
[0013]
Further, in the method for producing a woven fabric according to any one of claims 1 to 5, a twill weave in which two warps 1 and two flat wefts 3 intersect is adopted. It is related to.
[0014]
Further, in the method for producing a woven fabric according to any one of claims 1 to 6, the present invention relates to a method for producing a woven fabric, characterized in that a flat warp 1 subjected to a flattening treatment is adopted as the warp 1. .
[0015]
Further, in the method for producing a woven fabric according to any one of claims 1 to 7, the present invention relates to a method for producing a woven fabric, wherein the warp yarn 1 and the weft yarn 2 are obtained by converging ultrafine fibers. .
[0016]
Further, the present invention relates to a method for producing a fiber-reinforced resin, which comprises producing a fiber-reinforced resin using the woven fabric 4 produced by the method for producing a woven fabric according to any one of claims 1 to 8.
[0017]
Function and effect of the present invention
Since the flattening process is performed on the weft 2 in a tension-free state (a state in which no tension is applied) to form the flattened weft 3, the fibers constituting the weft 2 are not disturbed by the tension (tension). Therefore, flattening of the weft 2 is better achieved than when tension is applied.
[0018]
The flat state of the flat weft 3 is held by the weft holding member 6 and led out into and out of the space 5 between the upper and lower warps 1 generated by the raising and lowering of the warp 1. Therefore, the flat weft 3 remains in a good flat state. And the flat fabric 4 can be manufactured accordingly.
[0019]
Further, since the flattening process is performed immediately before the weft 2, actually, the flat weft 3 is held in the weft holding body 6, the flat state of the flat weft 3 is quickly held by the weft holding body 6. Therefore, the flat state of the flat weft 3 does not return to the original state, and from this point, the extremely flat fabric 4 can be manufactured.
[0020]
Since the present invention is as described above, it is possible to produce a flat fabric which is extremely thin and has so-called small eyes formed by warp and weft as small as possible.
[0021]
Also, a good fiber reinforced resin can be manufactured using this flat woven fabric.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
The drawings illustrate one embodiment of the present invention and will be described below.
[0023]
In the present embodiment, a predetermined number of warps 1 are raised and lowered, while the wefts 2 are held by a weft holding body 6, and the weft holding bodies 6 Is a method of introducing the weft 2 into the gap 5 by repeating the above, and weaving the woven fabric 4 composed of the warp 1 and the weft 2 by repeating these steps. Immediately before, the weft 2 is subjected to a flattening process in a tension-free state to form a flat weft 3, and the flat weft 3 is held by the weft holding body 6 in a state where the flat state is held, and the weft holding body 6 is This is a method of manufacturing an extremely thin and flat woven fabric 4 for a fiber reinforced resin by drawing out and entering the gap 5.
[0024]
As the warp yarn 1 and the weft yarn 2, those in which ultrafine fibers are converged (there is preferably a non-twisted yarn from the viewpoint of easy flattening, that is, easy opening).
[0025]
As the ultrafine fibers, those used for fiber reinforced resins such as carbon fibers and glass fibers are appropriately selected and employed depending on the application.
[0026]
The warp 1 adopts a flat warp 1 that has been subjected to a flattening process (spreading process).
[0027]
The raising and lowering of the warp yarns 1 by a predetermined number is the same as in a general loom for weaving a woven fabric. In the case of this embodiment, the raising and lowering of the two heald bodies 22 is performed. The two heald bodies 22 repeat the operation in which when one heald body 22 rises, the other heald body 22 descends.
[0028]
In the drawing, reference numeral 21 denotes a back roll, 23 denotes an easing roll, 24 denotes a reed, 27 denotes a warp and warp ball, 32 denotes a cloth receiving roll, 33 denotes a nip roll, 36 denotes a housing, 38 denotes a double winding roll, and 48 denotes a winding roll. is there.
[0029]
A gap 5 between the upper and lower warps 1 generated by raising and lowering the warp 1, specifically, a space A surrounded by the upper and lower warps 1, the woven fabric 4 and the reed 24, holds a known weft holding called a rapier. The body 6 is led out. The configuration of the weft holding member 6 will be described later.
[0030]
The weft yarn 2 is wound around the bobbin 25, pulled out from the bobbin 25 between the pair of first guide rolls 43 and through a plurality of second guide rolls 44 by a payout roll 45, and the weft yarn 2 is stored in a tension-free state. It is introduced into the storage unit 26.
[0031]
As shown in FIG. 7, the storage unit 26 hangs a band 50 between the opposed rotating bodies 49, and wraps the weft 2 on the upper surface of the band 50 from the front side to the back side of the band 50. It is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-116837, in which the weft 2 is tension-free by continuously extending from the back side to the front side. The weft 2 is drawn out of the storage section 26 in a tension-free state. You. Note that reference numeral 51 in the drawing denotes a base.
[0032]
In the present embodiment, the plurality of second guide rolls 44 are respectively moved so as to be able to control the amount of weft 2 drawn out, and the amount of weft 2 drawn out is adjusted and stored in the storage unit 26. It is set so that the amount of the weft 2 can be controlled.
[0033]
Further, in the present embodiment, a yarn storage sensor 35 for determining the speed of pulling out the weft yarn 2 from the bobbin 25 is provided, and the feeding roll 45 is controlled according to the speed of pulling out the weft yarn 2 detected by the yarn storage sensor 35. The rotation speed is controlled.
[0034]
The weft yarn 2 stored in the storage part 26 is ejected by the ejection nozzle 34 and is led out. The drawn out weft yarn 2 is introduced into the preliminary flattening section 31 in which a plurality of rollers 9 are alternately provided in the vertical direction through the feeding roll 45, the guide roll 46, and the guide slit 28.
[0035]
In the preliminary flattening section 31, a preliminary flattening process is performed by pressing the weft yarn 2 against the plurality of rollers 9. By this preliminary flattening process, the weft 2 can be made into a flattened weft 3 having a higher degree of flattening.
[0036]
The weft 2 which has been subjected to the preliminary flattening process is subjected to a flattening process described below at a position immediately before being held by the weft holding body 6 to become a flat weft 3, and the flat weft 3 is immediately converted to the weft holding body 6. And is guided into and out of the gap 5.
[0037]
Incidentally, reference numeral 47 in the figure denotes a guide roll.
[0038]
This flattening process will be described in detail.
[0039]
In the flattening process, a weft passing gap 7 is provided in a path through which the weft 2 passes, and when the weft 2 passes through the weft passing gap 7, the ultrafine fibers constituting the weft 2 are separated, and the weft 2 becomes flat. A flattening process is employed (see FIG. 3).
[0040]
The weft passing gap 7 is formed between the upper and lower two plate bodies 8a and 8b. That is, the weft 2 is configured to be flat by passing the weft 2 through the gap (the weft passage gap 7) between the upper and lower two plate bodies 8a and 8b.
[0041]
The upper and lower two plate bodies 8a and 8b are provided at both front and rear ends in the traveling direction of the weft 2 so that the weft 2 can be easily introduced into the weft passage gap 7 between the upper and lower two plate bodies 8a and 8b. A widening portion 29 having a shape in which the interval is widened toward the part side is provided.
[0042]
Further, the weft passing gap 7 is provided at two places in the traveling direction of the weft 2. The weft 2 is flattened stepwise by the two weft passage gaps 7. By this stepwise flattening treatment, the weft 2 can be made into a flat weft 3 having a very high degree of flatness.
[0043]
Guide portions 30 for guiding the movement of the weft 2 and the flat weft 3 are provided at the front and rear positions in the weft passing gap 7 in the traveling direction of the weft 2.
[0044]
The flat weft 3 having been subjected to the flattening process is held by a weft supply body 41 provided near the warp 1 which is raised and lowered by a heald body 22.
[0045]
Specifically, as shown in FIG. 6, the weft supply body 41 is a tubular body having a substantially rectangular cross section and is provided on one side of the warp 1, and the flat weft 3 is inserted into both upper and lower surfaces. The insertion hole 39 is provided, and a flat push plate 40 is further provided inside.
[0046]
That is, in the weft supply body 41, the flat weft 3 is inserted through the upper insertion hole 39 and is pressed by the flat push plate 40 so that the flat state is not broken (the flat state of the flat weft 3 is maintained. The holding mechanism) is led out from the lower insertion hole 39 as it is. Reference numeral 42 in the drawing is a guide for inserting the flat weft 3 into the insertion hole 39.
[0047]
The flat weft 3 held by the weft supply body 41 has a space A surrounded by the upper and lower warps 1, the fabric 4, and the reed 24 from opposite sides of the weft supply body 41 and the warp 1. The flat weft 3 is guided into the space A. 6 is a portion where the claw 37 is locked, and the portion is pulled by the claw 37 in the front direction of the drawing.
[0048]
The weft holding body 6 is a general rapier, and more specifically, is a rod-shaped body provided with a claw 37 which is engaged with the flat weft 3 at the tip end as shown in FIG. The weft holding body 6 is introduced into the weft supply body 41, locks the flat weft 3 held by the weft supply body 41 while maintaining the flat state, and connects the flat weft 3 to the weft supply body 41. 41 and is introduced into the space A.
[0049]
The claw 37 of the weft holding body 6 is configured to lock the flat weft 3 and transport the flat weft 3 when moving to one side, and to move the flat weft 3 when moving to the other side. Release the lock and move.
[0050]
Specifically, when moving in the direction (left direction in FIG. 2) leading out from the weft supply body 41, the flat weft 3 is locked and transported, and is introduced into the weft supply body 41 (see FIG. 2). 2 (to the right in the middle), the flat weft 3 is unlocked and moved.
[0051]
In the state where the flat weft 3 is introduced into the space A, the warp 1 that has risen is lowered by the operation of the heald body 22 and the warp 1 that has fallen rises. The provided weft 2 is sandwiched by the upper and lower warps 1, and the fabric 4 is woven by this repetition.
[0052]
In particular, when the woven fabric 4 is woven with a twill weave in which two warps 1 and two flat wefts 3 intersect, extremely good drape properties can be exhibited.
[0053]
In the present embodiment, as described above, since the flattening process is performed on the weft 2 in a tension-free state (a state in which no tension is applied) to obtain the flattened weft 3, the fibers constituting the weft 2 may be separated. The flattening of the weft 2 is not hampered by the tension (tension), so that it is better achieved than when the tension is applied.
[0054]
The flat weft 3 is held by the weft holding body 6 in the flat state and drawn out into the gap 5 between the upper and lower warps 1 generated by the raising and lowering of the warp 1. Therefore, the flat weft 3 is kept in a good flat state. And the flat fabric 4 can be manufactured accordingly.
[0055]
Further, since the flattening process is performed immediately before the weft 2, actually, the flat weft 3 is held in the weft holding body 6, the flat state of the flat weft 3 is quickly held by the weft holding body 6. Therefore, the flat state of the flat weft 3 does not return to the original state, and from this point, the extremely flat fabric 4 can be manufactured.
[0056]
Further, since the warp 1 and the weft 2 are made by converging ultra-fine fibers (which tend to be flat), flattening can be achieved more favorably.
[0057]
Moreover, since the weft 3 is preliminarily flattened and then flattened by passing through the weft passage gap 7, even better flattening can be achieved from this point.
[0058]
Therefore, according to the present embodiment, it is possible to produce a flat woven fabric which is extremely thin and has so-called small eyes formed by the warp and the weft.
[0059]
Also, a good fiber reinforced resin can be manufactured using this flat woven fabric.
[0060]
It has been confirmed by an experiment that the woven fabric manufactured according to the present embodiment is extremely thin as compared with the conventional product.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view of the present embodiment.
FIG. 2 is a schematic explanatory diagram of the present embodiment.
FIG. 3 is an enlarged explanatory perspective view of the present embodiment.
FIG. 4 is an explanatory side view of the present embodiment.
FIG. 5 is an explanatory side view of the weft holding member 6 (partially cut away so that the claw 37 can be visually recognized) and the weft supply member 41 of the present embodiment.
FIG. 6 is an explanatory sectional view of a weft supply body 41 of the present embodiment.
FIG. 7 is a schematic explanatory view of a storage section 26 of the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Warp, flat warp 2 Weft 3 Flat weft 4 Woven cloth 5 Air gap 6 Weft holding body 7 Weft passing gap 8a, 8b Plate 9 Roller

Claims (9)

By raising and lowering a predetermined number of warps, the weft is held by a weft holding body, and the weft holding body is led out into the gap between the upper and lower warps generated by the raising and lowering of the warp, thereby inserting the weft into the gap. A method of weaving a woven fabric composed of a warp and a weft by repeating these steps, wherein the weft is subjected to a flattening process in a tension-free state immediately before the weft is introduced into the gap to obtain a flat weft. A method for producing a woven fabric, characterized in that a flat weft is held by the weft holding body in a state where the flat state is held, and the weft holding body is led into and out of the gap. In the method for producing a woven fabric according to claim 1, as the flattening process to be performed on the weft, a flattening process is provided in which a weft passing gap is provided in a weft passing path and the weft passes through the weft passing gap to flatten the weft. A method for producing a woven fabric, comprising: 3. The method for producing a woven fabric according to claim 2, wherein the weft passing gap is formed between two upper and lower plates. The method for producing a woven fabric according to any one of claims 1 to 3, wherein the weft holding body is provided with a flat holding mechanism for holding the flat weft and holding the flat weft in a flat state. Manufacturing method of woven fabric. The method for producing a woven fabric according to any one of claims 1 to 4, wherein a preliminary flattening process of pressing the weft against a roller is performed before the flattening of the weft. The method for producing a woven fabric according to any one of claims 1 to 5, wherein a twill weave in which two warps and two flat wefts intersect is adopted. The method for producing a woven fabric according to any one of claims 1 to 6, wherein a flattened warp that has been subjected to a flattening treatment is used as the warp. The method for producing a woven fabric according to any one of claims 1 to 7, wherein the warp and the weft are obtained by converging ultrafine fibers. A method for producing a fiber reinforced resin, comprising producing a fiber reinforced resin using the woven fabric produced by the method for producing a woven fabric according to claim 1.

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