JPH02200840A - Disklike woven fabric and production thereof - Google Patents

Abstract

PURPOSE:To obtain the title woven fabric having approximately the same strength from the center to the outer periphery by spirally placing yarn in the peripheral direction in radiately arranged yarn and densifying intervals of yarn in the peripheral direction toward the outside. CONSTITUTION:A disklike woven fabric 1 consists of radiated yarn 2 and yarn 3 in the peripheral direction which crosses the radiated yarn and is spirally extended, the yarn 3 in the peripheral direction has low density in the vicinity of the center and higher density as the yarn reaches the outer periphery. The radiated yarn is partially threaded from the midst to the outer periphery of the disklike woven fabric 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a disk-shaped fabric made of radial yarns and circumferential yarns, and a method for weaving the disk-shaped fabric. The present invention relates to a disk-shaped woven fabric suitable as a fiber reinforcing material when manufacturing a disk-shaped high-speed rotating body such as a wheel or a flywheel using a composite material of fibers and resin, and a method for manufacturing the same.

2. Description of the Related Art Generally, when obtaining a disk-shaped composite material, a circular cut fabric is used as the reinforcing material. However, although this fabric is reinforced in the warp and weft directions, the reinforcing effect in the diagonal direction is poor, and it is not suitable for use as a high-speed rotating body.

Composite materials are usually made of high-strength, high-modulus fibers such as carbon fibers:
It is used as a reinforcing material, hardened with resin, and molded into a fixed shape.In this case, the resin acts as a binder, and the mechanical strength of the composite material is mainly borne by the reinforcing material. Therefore, when the above-mentioned fabric is used as a reinforcing material, the strength differs depending on the direction of the disk, and when it is rotated as a high-speed rotating body, centrifugal force causes distortion in the disk shape.

Therefore, the reinforcing material for a disk for a high-speed rotating body must have uniform strength in all directions from the center.

For example, such a woven structure is disclosed in Japanese Patent Application Laid-Open No. 62-17
The one shown in Japanese Patent No. 0550 is known. In this type, the warp threads are arranged radially, and the weft threads are arranged in a spiral pattern while crossing the warp threads.The warp threads extend radially from the center and have uniform strength in all directions.

Problems to be Solved by the Invention However, in the above structure, the spacing of the warp threads (radial threads) is different between the position near the center and the position near the outer periphery, and the density of the warp threads is too large in the part near the center. For,
Only a portion of the warp threads are woven into the weave, and the pond threads are left floating without being woven together with the weft threads, and must be removed in a later process. Furthermore, since the density of the warp yarns is low near the outer periphery, the texture with the weft yarns is insufficient.

Therefore, when a composite material reinforced with this fabric is rotated as a high-speed rotating body, an outward force due to centrifugal force acts on the warp threads that are cut midway, which may cause cracks in the composite material. There is. In addition, centrifugal force acts on the weft yarns near the outer periphery, causing them to expand outward, making it impossible for the warp yarns to support this force.

The present invention was made in view of the above circumstances, and it is an object of the present invention to provide a disc-shaped R object that can sufficiently withstand the large centrifugal force caused by high-speed rotation.

As a means for solving the problem, the disc-shaped fabric of the present invention is made by weaving circumferential yarns extending in the circumferential direction into radial yarns arranged in a radial manner in a spiral manner. It is characterized by the fact that the spacing is narrow near the center and becomes denser toward the outside.

Further, in the method for manufacturing a disc-shaped fabric according to the present invention, a plurality of radial threads extending radially from a center are passed through a heald arranged in a ring around the center, and the heald is moved up and down to open an opening in the radial thread. While moving, a shirttle containing a circumferential yarn is placed in an annular space surrounded by the opened radial yarn and the heald, and the shirttle is rotated in a circular manner around a position immediately adjacent to the heald. This method is characterized in that while tension is applied to the circumferential threads fed out from the shirttle, the tension is applied to weave the threads into the radial threads.

Example Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the disk-shaped fabric of the present invention. Reference numeral 1 denotes the disk-shaped fabric, which is composed of radial threads 2 extending radially from the center thereof, and circumferential threads 3 intersecting the radial threads 2 and extending spirally in the circumferential direction.

The circumferential threads 3 spirally extend outward from the center of the disc-shaped fabric 1, and the density of the circumferential threads 3 is low near the center, but gradually increases as the density approaches the outer periphery. The density of the directional threads 3 is increased, and they are woven with high density near the outer periphery.

Also, some of the radial threads 2 extend through the center to the outer periphery, while others are woven only from the middle of the disc-shaped fabric 1 to the outer periphery, and are woven near the center 11. does not exist.

In this embodiment, the disk-shaped fabric 1 is made of fabric up to the center, but since high-speed rotating bodies often have a through hole in the center for attaching a rotating shaft,
When used as a reinforcing material, the center portion can be cut out to form a hole.

Next, FIG. 2 shows a state in which a disk-shaped fabric 1 is manufactured by the method of the present invention. 4 is a heald of am, which is arranged in a ring shape centered on the center of the disk-shaped fabric 1 to be woven. It is located.

The radial thread 2 passes through the center and is passed through opposing healds 4 on both sides, and a predetermined tension is applied to the outside of the heald 4. By moving the heald 4 up and down, the radial thread 2 forms an opening.

Reference numeral 5 denotes a shuttlecock, which accommodates a bobbin 6 around which circumferential yarn 3 is wound. The shirttle 5 is disposed in an annular space surrounded by the open radial thread 2 and the heald 4, and is adapted to rotate and run in an annular manner immediately inside the heald 4 at a constant speed.

First, the ends of the circumferential yarns 3 are connected to the center of the radial yarns 2, and the shirttle 5 is attached within the opening of the radial yarns 2.
Let it rotate. Therefore, when the circumferential yarn 3 fed out from the shuttlecock 5 is woven into the radial yarn 2 while applying tension, in the initial stage, the circumferential yarn 3 woven by one circumference of the shuttlecock 5 is woven into the radial yarn 2. The length is short and the shirt size is 5.
Since the speed at which the circumferential yarn 3 is let out is low, the tension applied to the circumferential yarn 3 is small, and it is woven relatively coarsely.

As weaving progresses, the position of the weave gradually moves outward, and the length of the circumferential yarn 3 woven by one circumference of the shirttle 5 increases, and the length of the circumferential yarn 3 fed out from the shirttle 5 increases. 3 speed increases. In this case, the tension applied to the circumferential yarn 3 increases, and the weaving density of the circumferential yarn 3 gradually becomes denser.

In addition, as shown in FIG. 1, when only some radial threads 2 are passed through the center of the disk-shaped fabric 1 and other radial threads 2 are woven from the middle, all the healds 4 must be moved up and down at the same time. At the initial stage of weaving, only some healds 4 are moved up and down, and the other healds 4 are fixed at the upper or lower opening position. Only the radial threads 2a undergo shedding motion and are organized with the circumferential threads 3, while the other radial threads 2b float above or below the disk-shaped fabric 1.

As weaving of the disc-shaped fabric 1 progresses, the number of healds 4 participating in the vertical movement is increased, and more radial threads 2 are organized with circumferential threads 3. Finally, all the radial yarns 2 are organized with the circumferential yarns 3.

After weaving is completed, the radial yarn 2b floating on one side
When cut out, a disk-shaped fabric 1 as shown in FIG. 1 is obtained.

Next, FIG. 3 shows a state in which a disk-shaped fabric 1 having a through hole in the center is woven. A ring 7 is placed at the position of the through hole of the disc-shaped fabric 1, and the center of the radial thread 2 is placed in the ring 7.
through it and lock it on the hook 8. In this state, when the heald 4 is moved up and down to open the radial threads 2 and the shirttle 5 is rotated, the circumferential threads 3 are woven only outward from the ring 7. Therefore, when the radial threads 2 at the center are cut out after weaving, a disc-shaped weave with through holes is created.
1 is obtained.

Function In the present invention, since the density of the circumferential yarns 3 in the outer peripheral part of the disc-shaped fabric 1 is high, the radial yarns 2 in this part are
is firmly held against the circumferential thread 3. Therefore, in a high-speed rotating body made of a composite material using this disc-shaped #a material 1 as a reinforcing material, even if centrifugal force acts due to high-speed rotation, the radial threads 2 are not supported by the circumferential threads 3. It is firmly fixed and will not fall out.

Furthermore, even if the circumferential thread 3 is subjected to an outward swelling force due to centrifugal force, the radial thread 2 firmly gripped supports it, so that it will not swell outward and become distorted. do not have.

Effects of the Invention Therefore, according to the present invention, the radial threads 2 extending radially from the center can support a force directed in the radial direction, and are disk-shaped with uniform strength in all directions without directionality. This will be fabric 1. Moreover, since the radial threads 2 and the circumferential threads 3 are firmly fixed, the radial threads 2 will not fall out and the circumferential threads 3 will not swell, making it a reinforced material for high-speed rotating bodies. It is extremely suitable as

Furthermore, the method of the present invention can produce disk-shaped fabrics 1 in large quantities using a simple device.
Therefore, the disk-shaped fabric 1 can be supplied at low cost. In particular, the devices shown in FIGS. 2 and 3 are
It can be easily produced by making slight modifications to a circular loom for producing tubular woven fabrics.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the disc-shaped fiber of the present invention. FIGS. 2 and 3 are central longitudinal cross-sectional views showing a state in which a disk-shaped fabric is manufactured by the method of the present invention, respectively. 1......to a disc shape'! tJ 2...
・Radial yarn 3... Circumferential yarn 4...
... Held 5 ... Shattle King Map

Claims (1)

[Claims] 1. Circumferential yarns (3) extending in the circumferential direction are woven into radial yarns (2) arranged in a radial manner in a spiral manner,
A disc-shaped fabric 2 characterized in that the intervals between the circumferential threads (3) are coarse near the center and become denser toward the outside. A plurality of radial threads (2) extending radially from the center. is passed through a heald (4) arranged annularly around the center, and the heald (4) is moved up and down to remove the radial thread (2).
), the opened radial yarn (2)
A circumferential thread (
A shuttle (5) storing the yarn (3) is arranged, and the shuttle (5) is caused to rotate in a circular manner around the position closest to the heald (4), and the circumferential yarn (3) fed out from the shuttle (5) is ) while applying tension to the radial threads (2) and weaving the fabric into the radial threads (2) using the tension.