JPH08127939A - Three-dimensional woven fabric as fitting material and its weaving method - Google Patents

Abstract

PURPOSE: To obtain three-dimensional woven fabric which is given a desirable fiber orientation as a preform for fitting materials using a simple means utilizing the filament-winding process, thus can develop sufficient reinforcing effect and provide a weaving method therefor. CONSTITUTION: This three-dimensional woven fabric for reinforcing fitting material 1 comprises the supporting hole parts 2 and the supporter 4 and they are integrally connected. This woven fabric 1 has a cylindrical inner peripheral part 10 formed by helically winding up a fiber bundle and the outer part composed of the wound part 22 formed by helically winding up a fiber bundle as it includes the inner peripheral part 10 inside in tightly bonded state and an extension 23 for forming the supporting part 4. The extension for the supporter is compressed flat in the form of the supporter and the space inside the outer part is filled with a filler 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional woven fabric for fittings and a weaving method thereof, and more specifically, a single or a plurality of support hole portions and a support portion for supporting them are integrally formed. Three-dimensional for constructing fittings (small auxiliary parts of standard size used for assembling engines, piping systems, machines or other devices) that have a series of structures and are used as bearings, wire supports, etc. The present invention relates to a woven fabric and a weaving method thereof.

[0002]

2. Description of the Related Art A fitting having a structure in which a single or a plurality of support holes and a support for mounting them are integrally connected to each other often requires relatively high strength. Although it is desirable to manufacture the fiber, its shape is not suitable for three-dimensional weaving of the reinforcing fiber, and it is difficult to weave the preform due to this, and the fiber considering the strength of each fitting part is used. It is very difficult to obtain a preform having an orientation and a weaving structure. Therefore, when fiber fitting is required in the above fitting, a lot of manual work is required, or the fiber orientation is such that the strength of each part cannot be sufficiently strengthened, and a product that cannot sufficiently achieve the purpose of fiber strengthening. I can only get it.

In forming the above-mentioned three-dimensional woven fabric for fittings, there is a possibility that the winding of rovings by the filament winding method (hereinafter referred to as the FW method) can be effectively used, but the FW method is simply used. Can not be applied, even if it can be applied, in the member formed by the FW method, especially when an external force along the fiber layer parallel to the orientation direction of the wound roving acts, Along with this, there is a problem that delamination easily occurs. Therefore, when using the FW method, it is necessary to use it in such a manner that the problem of delamination can be solved, and consideration for that is required.

[0004]

The technical problem of the present invention is to obtain a desired fiber orientation as a preform for the above-mentioned fitting material by a simple means utilizing the FW method and to exert a sufficient reinforcing effect. A three-dimensional woven fabric for fittings and a weaving method thereof are provided. Another technical problem of the present invention is that it is possible to effectively use the FW method on the premise that it is possible to solve the problem that peeling easily occurs between fiber layers in a member formed by winding a fiber bundle by the FW method. A three-dimensional woven fabric for fittings and a weaving method thereof are provided.

Another technical problem of the present invention is that, in general, a fitting in which one or a plurality of support hole portions and a support portion for mounting them are integrally connected to each other is provided with a circumferential force around the support hole. It is intended to provide a three-dimensional woven fabric for a fitting material and a weaving method thereof, which effectively reinforces the woven fabric so as to obtain sufficient strength against the force in the circumferential direction.

Further, in a fitting in which a single or a plurality of support hole portions and a support portion for attaching them are integrally connected, a support hole portion having a support hole for attaching a shaft or a wire and other fixing holes A relatively large force in various directions acts on the connection part with the support part attached to the member, etc., and the support part is subjected to a tensile or compressive force in the longitudinal direction (direction toward the support hole), or a shear in a direction orthogonal thereto. Power acts. Another technical object of the present invention is to provide a three-dimensional woven fabric for fittings, which is effectively reinforced against such forces and is capable of obtaining sufficient strength, and a weaving method thereof.

[0007]

A three-dimensional woven fabric for fitting materials of the present invention for solving the above-mentioned problems is a reinforcement of a fitting material in which a supporting hole portion and a supporting portion for supporting the supporting hole portion are integrally connected. A three-dimensional woven fabric for use, by winding a fiber bundle in a state in which the inner peripheral piece of the support hole portion formed in a tubular shape by winding the fiber bundle and the inner peripheral piece are included,
A winding part wound around the inner peripheral part piece and a support part extending part for forming the support part are formed in a continuous state, and the winding part is formed around the inner peripheral part piece. Close to
An outer side piece compressed and flattened into a shape of a support portion to obtain an extended portion for a support portion, and the extended portion for a support portion that is compressed and flattened, or the extended portion for a support portion and an inner peripheral portion piece It is characterized in that it is formed by a filler interposed in the space generated between the two.

In the above-mentioned three-dimensional woven fabric for fitting materials, one or both of the support hole portion and the support portion for supporting the support hole portion, in the direction intersecting with the wound fiber bundle,
A reinforcing rod formed by binding and hardening a fiber bundle with a matrix may be inserted. Further, the three-dimensional woven fabric for a fitting material is formed by winding a fiber bundle of an outer side piece having an extension part for a support part while enclosing a plurality of inner peripheral side pieces, and separating the plurality of inner peripheral side pieces. The support portion is formed by compressing and flattening the support portion extension portion of the outer portion piece between the inner peripheral portion pieces, or a single inner peripheral portion piece is included. In this state, the fiber bundle of the outer piece having the extending portion for the supporting portion is stacked, and the extending portion for the supporting portion is extended to one side from the winding portion of the outer portion piece wound around the inner peripheral piece. Then, the support portion can be formed by compressing and flattening the end portion in a bent state.

On the other hand, in the method for producing a three-dimensional woven fabric for fittings according to the present invention, the step of forming the inner peripheral part of the support hole into a tubular shape by winding the fiber bundle, and the step of forming the inner peripheral part around the inner peripheral part A step of forming an outer side piece in which a winding part to be wound and an extension part for a support part for forming the support part are connected by winding a fiber bundle with the inner peripheral part included And a step of bringing the wound portion of the outer side piece into close contact with the periphery of the inner peripheral piece and compressing and flattening it into a shape of a supporting portion for obtaining an extending portion for a supporting portion, and the supporting for compression and flattening. A step of interposing a filler in a space formed in the extension part for the part or between the extension part for the support part and the inner peripheral part, and for supporting the support hole part and the support hole part as necessary. A matrix of fiber bundles is attached to one or both of the support parts in a direction intersecting the wound fiber bundle. It is characterized in that it comprises a step of inserting a reinforcing rod formed by curing.

[0010]

In order to manufacture the three-dimensional woven fabric for fittings having the above-mentioned structure, first, the inner peripheral piece of the single or plural supporting hole portions is formed into a tubular shape by winding the fiber bundle, and then,
By winding the fiber bundle in the state of including the inner peripheral piece,
Forming an outer side piece in which a winding portion wound around the inner peripheral portion piece and a support portion extending portion for forming the support portion are continuously provided,
The winding portion is brought into close contact with the periphery of the inner peripheral piece, and is compressed and flattened into a shape of a supporting portion for obtaining the extending portion for the supporting portion. Further, a filler is provided in the space extending between the support-portion extending portion that is compressed and flattened or between the support-portion extending portion and the inner peripheral piece.

Generally, in a fitting in which a single or a plurality of support hole portions and a support portion for attaching them are integrally connected, a circumferential force often acts around the support holes, and as described above. By forming a three-dimensional woven fabric for fittings, the support hole portion is effectively reinforced by the layer of the reinforcing fiber wound around the support hole at the winding portion of the cylindrical inner peripheral piece and the outer side piece, A desired fiber orientation can be obtained as a preform for a fitting material, and the fiber orientation can be obtained by a simple means using the FW method.

Further, in the above fitting, a relatively large force in various directions acts on the connecting portion between the supporting hole portion and the supporting portion, and at the same time, a tensile or compressive force in the longitudinal direction of the supporting portion or a direction orthogonal thereto. The three-dimensional woven fabric for fitting materials configured as described above has the fiber orientation in the supporting portion oriented in the longitudinal direction thereof, and at the same time, the winding portion of the outer side piece constituting the supporting portion. Surrounds the periphery of the inner peripheral piece in the support hole portion, so that an effective reinforcing effect is exerted against those forces, and sufficient strength can be obtained as a three-dimensional woven fabric for fitting materials.

When the support portion extension portion is compressed and flattened into, for example, a T-shape, a substantially triangular space is formed at the center of the intersection, and the outer portion closely contacted with the periphery of the inner peripheral portion is formed. Even in the portion where the supporting portion extending portion is extended from the winding portion of the piece, a similar substantially triangular space is generated between the supporting portion extending portion and the inner peripheral portion piece. Leaving the space of will lead to a decrease in strength. However, if these spaces are crushed by the compression flattening of the outer side piece, there is a possibility that the strength will be rather deteriorated due to the bending of the reinforcing fiber at that portion. From such a viewpoint, the filler interposing in the space described above effectively acts to increase the strength of the three-dimensional fabric for fitting materials.

Further, in the above three-dimensional fabric for fitting materials, since the fiber bundle is wound by the FW method,
There is a problem that peeling is likely to occur between the wound fiber layers, but since the reinforcing rod is inserted in the supporting hole portion or the supporting portion in the direction intersecting with the wound fiber bundle, the insertion direction is also It is possible to obtain a three-dimensional woven fabric for fittings and a weaving method thereof, which is reinforced so that delamination can be suppressed.

[0015]

EXAMPLE A three-dimensional woven fabric for a fitting material according to the present invention is formed of a three-dimensional woven composite material in which a single or a plurality of supporting hole portions and a supporting portion for supporting them are integrally connected. The present invention constitutes a preform for carrying out, and specifically, the preforms illustrated in FIGS. 3 and 4 can be used, but the form is not limited thereto. Below, while explaining the weaving method of the three-dimensional woven fabric of the present invention, an example of the constitution of the three-dimensional woven fabric itself for fitting materials will be described in detail.

1 to 3 have a plurality of supporting hole portions 2, 2 each having a supporting hole 3 and a supporting portion 4 for supporting them, based on the three-dimensional weaving method of the present invention. Fig. 4 shows a process of manufacturing the three-dimensional fabric 1 for a fitting material of Fig. 3 in order. When manufacturing the three-dimensional fabric 1 for the fitting material, first, referring to FIG.
As shown in FIG. 3, a plurality of cylindrical inner peripheral pieces 10, 10 for forming the inner peripheral portion of the support hole 2 are formed as a fiber layer having a required thickness by winding a fiber bundle by the FW method. To do. The winding of the fiber bundle by the FW method is performed by forming the fiber layer by winding the fiber bundle around the mandrel having a sectional shape corresponding to the shape of the support hole 3 of the fitting to be obtained, or around the winding member as appropriate. Is done by. When winding the fiber bundle, the fiber bundle can be separately oriented in the axial direction of the mandrel or the winding member, if necessary.

Inner peripheral piece 1 in which fiber bundles are wound by the FW method
In order to prevent delamination within 0, when the reinforcing rod 12 is inserted into the fiber layer formed by winding in a direction orthogonal to or oblique to the fiber bundle, the reinforcing rods 12 are sequentially inserted in the winding process. The rod 12 can be inserted. The rod 12 is obtained by binding and hardening a fiber bundle with a matrix made of synthetic resin or the like, and can be erected on the surface of the mandrel or the like in advance when the fiber bundle is wound, or the rod 12 is a needle. It can also be pierced into the wound fiber layer in the form of a strip. Also,
The reinforcing rod 12 may be arranged all around the inner peripheral piece 10, but may be partially arranged in a necessary portion. In FIG. 1, the rod 12 is supported by the supporting portion 4 ( FIG. 3) shows a state in which it is provided only in the portion facing.

In the next step, as shown in FIG. 2, the winding portion 22 to be wound around the inner peripheral piece 10 and the supporting portion 4 are formed.
The fiber layer of the outer side piece 20 continuous with the extension part 23 for the support part for forming the is formed by winding the fiber bundle by the FW method with both the inner peripheral pieces 10 included. Furthermore,
In order to form the outer side piece 20 formed by winding the fiber bundle into a desired shape, the winding part 22 of the outer side piece 20 is brought into close contact with the periphery of the inner peripheral piece 10 and for the opposing support portion. Supporting part 4 to be obtained by joining the extension part 23
Flattened into the shape of. Therefore, in the step of forming the outer side piece 20 by winding the fiber bundle, the extension portion 23 for the support portion is made to have a required length in consideration of the deformation in the compression flattening step of the outer side piece 20 that follows. It needs to be formed. As the fiber bundle for forming the inner peripheral piece 10 and the outer side piece 20 by the FW method, a fiber bundle of reinforcing fibers such as so-called roving, such as carbon fiber, or a thread made of an appropriate material is used. it can.

In the compression flattening step, the inner peripheral piece 10 is
In a portion where the extension portion 23 for the support portion is extended from the winding portion 22 of the outer portion piece 20 that is in close contact with the periphery of the outer portion piece 20, a substantially triangular shape is provided between the extension portion 23 for the support portion and the inner peripheral piece 10. A space of shape is created, and if this is left, it will cause a decrease in strength,
By interposing the filling material 30 in this space, a decrease in strength of that portion is suppressed. If this space is crushed by further flattening the compression of the outer side piece 20, there is a possibility that the reinforcing fiber may bend at that portion and the strength may be impaired. It is effective for increasing the strength of the connecting portion.

The filling material 30 is not limited to the triangular shape which is interposed in the space in the gathering portion of the three fiber layers as shown in the drawing, and is, for example, a plate to be inserted into the inner space of the outer side piece 20 in FIG. It is also possible to have a shape that fills the inner space such as a shape. In addition, as a material for forming the filler 30, a fiber such as a non-woven fabric or a roving, which is inserted in a space formed in the outer side piece 20 and allows the rod to penetrate, similar to the reinforcing rod 12 described above. It is possible to use a reinforcing material made of an aggregate or a shaping spacer made of an appropriate material such as plastic or metal piece.

In the three-dimensional woven fabric thus formed in the desired shape, in order to prevent the above-mentioned delamination, the supporting fiber portion 2 or the supporting portion 4 is provided with a wound fiber layer at a necessary portion. On the other hand, the reinforcing rod 24 can be inserted in a direction orthogonal to or oblique to the fiber bundle. Similar to the rod 12, the reinforcing rod 24 is made by binding and hardening a fiber bundle with a matrix made of synthetic resin or the like, and the insertion thereof is performed by sequentially inserting fibers in the process of winding the fiber bundle of the outer side piece 20. Although it can be inserted between the bundles, it can be preliminarily provided upright on the surface of the inner peripheral piece 10 when the fiber bundle is wound, or the rod 24 is needle-shaped and wound. It is also possible to insert into the fiber layer. When a reinforcing material made of a fiber aggregate is used as the filling material 30, the reinforcing rod 24 is inserted into the filling material 30 through the outer side piece 20 to form the outer side piece 2.
The layer between 0 and the filler 30 can be strengthened.

According to the above-described weaving method, a reinforcing three-dimensional woven fabric for a fitting material, in which the supporting hole portion 2 and the supporting portion 4 for supporting the supporting hole portion 2 are integrally connected, is obtained by stacking fiber bundles. The cylindrical inner peripheral piece 10 of the formed support hole portion 2
And a supporting portion for forming the winding portion 22 and the supporting portion 4 to be wound around the inner peripheral piece 10 by winding the fiber bundle while enclosing the inner peripheral piece 10. It is formed in a state of being continuously connected to the extension portion 23 for a wire, and the wound portion 22 is brought into close contact with the periphery of the inner peripheral piece 10 and the extension portion 23 for a supporting portion facing each other is joined. The support portion 4 has a compression-flattened outer side piece 20, and is interposed in a space formed between the compression-flattened support-side extending portion 23 and the inner peripheral piece 10. It is possible to obtain a preform for a fiber reinforced fitting material which has the filler 30 and in which the reinforcing rods 12 and 24 are inserted in necessary portions.

This preform can be integrated with a matrix resin by using a required molding method such as an impregnation method or an RTM method to obtain a fitting made of a three-dimensional woven composite material. This three-dimensional woven fabric composite material is used by inserting a shaft, a wire or the like into the support hole portion 2 and appropriately attaching the support portion 4 to a member or the like.

FIGS. 4 and 5 show a single support hole portion 4 having a support hole 43 based on the three-dimensional weaving method of the present invention.
2 shows a structure of a three-dimensional fabric 41 for fitting material having two and a supporting portion 44 for supporting them. At the time of manufacturing the three-dimensional fabric 41 for fitting material, as in the case shown in FIG. 1, a single cylindrical inner peripheral portion piece 50 for forming the inner peripheral portion of the support hole portion 42.
To form the winding portion 62 and the support portion 44, which are wound in layers around the inner peripheral piece 50, as described with reference to FIG. The outer side piece 60 in which the supporting portion extending portion 63 of FIG.
It is formed by winding the fiber bundle by the FW method with the inner peripheral piece 50 included.

Further, the winding portion 6 of the outer side piece 60.
The T-shaped support portion 44 is formed by bringing the 2 into close contact with the periphery of the inner peripheral portion piece 50 and joining the opposing support portion extension portions 63 to flatten them by compression. Also in this case, when the opposing portions of the support portion extending portions 63 are brought into contact with each other during compression flattening, the outer side piece 6 closely contacted with the periphery of the inner peripheral piece 50.
Between the extending portion 63 for the support portion and the inner peripheral portion piece 50 at the portion where the extending portion 63 for the supporting portion extends from the winding portion 62 of 0 and the center of the T-shaped intersection portion of the supporting portion 44. Since a space having a substantially triangular shape is generated in the support portion extension portion 63,
A filler 70 is provided in this space to reinforce those portions. As the filling material 70, the same material as in the above-mentioned embodiment can be used. In addition, here, the support portion 4
Although 4 is formed in a T shape, it may be formed in a straight shape or bent in an L shape.

Also in this embodiment, in order to prevent delamination in the inner peripheral piece 50 and the outer side piece 60, as in the case of the above-described embodiment, a direction orthogonal or oblique to the wound fiber layer is provided. A reinforcing rod can be inserted into the. Note that FIG. 4 shows a state in which the reinforcing rod 64 is inserted in the supporting hole portion 42 and the supporting portion 44 in a direction orthogonal or oblique to the fiber bundle with respect to the wound fiber layer.

Generally, one or more support holes 2, 4
In the fitting in which the two and the supporting portions 4 and 44 for mounting them are integrally connected, a circumferential force acts around the supporting holes 3 and 43, but for the fitting material obtained as described above. In the composite material using the three-dimensional woven fabrics 1,41 as the base material, the support hole portions 2,42 have the inner peripheral pieces 10,5.
0 and the wound portions 22 and 62 of the outer pieces 20 and 60 are effectively reinforced by the reinforcing fiber layers wound around the support holes 3 and 43 to obtain a desirable fiber orientation as a preform for fitting materials. The fiber orientation can be obtained by a simple means utilizing the FW method.

Further, in the above fitting, a relatively large force in various directions acts on the connecting portion between the support hole portions 2, 42 and the support portions 4, 44, and the support portions 4, 44 are pulled in the longitudinal direction. Alternatively, a compressive force or a shearing force in a direction orthogonal to them acts, but in the fitting configured as described above, the fiber orientation in the supporting portions 4 and 44 is directed in the longitudinal direction thereof, and at the same time, the supporting portion 4 , 4
Since the winding parts 22, 62 of the outer side pieces 20, 60 constituting the outer peripheral side piece 4, surround the circumference of the inner peripheral side pieces 10, 50 in the support hole portions 2, 42, it is effective against those forces. A reinforcing effect is exhibited, and sufficient strength can be obtained as a preform for fitting materials.

Further, in the three-dimensional woven fabric for fitting material, the supporting holes 2 and 42 and the supporting portions 4 and 44, which are fiber layers wound to a required thickness, are provided with a reinforcing component in the thickness direction of the fiber layer. Since the reinforcing rods 12, 24, and 64 are inserted to form the structure, the toughness that strengthens the bonding force between the fiber layers formed by winding the fiber bundle by the FW method and does not easily cause the separation between the fiber layers. It is possible to express high characteristics.

[0030]

According to the present invention described in detail above, a desired fiber orientation as a preform for a fitting material can be obtained by a simple means utilizing the FW method, and it can be strengthened against delamination, It is possible to obtain a three-dimensional woven fabric for fittings and a weaving method thereof, which can exhibit a sufficient reinforcing effect.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a configuration of an inner peripheral piece in a three-dimensional fabric for fitting materials of the present invention.

FIG. 2 is an explanatory view showing a state in which an outer side piece is wound around the inner side piece of FIG.

FIG. 3 is a front view of a three-dimensional woven fabric for fitting materials formed of the material of FIG.

FIG. 4 is a front view showing another embodiment of the three-dimensional fabric for fitting materials of the present invention.

FIG. 5 is a side view of the same.

[Explanation of symbols]

 1,41 Three-dimensional fabric for fitting material 2,42 Support hole part 3,43 Support hole 4,44 Support part 10,50 Inner peripheral part piece 12 Reinforcing rod 20,60 Outer part piece 22,62 Winding part 23, 63 Extension part for support part 24, 64 Reinforcing rod 30, 70 Filler

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication location D03D 41/00 B (72) Inventor Masahiko Kinbara 2-chome, Sengen 2-chome, Tsukuba-shi, Ibaraki 6 Shares Company Three Day Con Poly Search

Claims (6)

[Claims] 1. A three-dimensional woven fabric for reinforcing a fitting material, wherein a supporting hole portion and a supporting portion for supporting the supporting hole portion are integrally connected to each other, and the supporting hole portion is formed into a cylindrical shape by winding a fiber bundle. And a support for forming the winding portion and the support portion which are wound around the inner peripheral portion piece by winding the fiber bundle in a state of including the inner peripheral portion piece. It is formed in a state in which it is connected to the extension portion for a part, and the wound portion is brought into close contact with the periphery of the inner peripheral piece, and the support portion is compressed and flattened to obtain the extension portion for a support portion. An outer side piece, and a filler interposed in the space extending between the extension part for the support part that is compressed and flattened or between the extension part for the support part and the inner peripheral part. A characteristic three-dimensional fabric for fitting materials. 2. The three-dimensional woven fabric for fitting material according to claim 1, wherein one or both of the support hole portion and the support portion for supporting the support hole portion intersects the wound fiber bundle. A three-dimensional woven fabric for fittings, characterized in that a reinforcing rod formed by binding and hardening fiber bundles in a matrix is inserted in the direction. 3. The three-dimensional woven fabric for fittings according to claim 1 or 2, wherein a plurality of inner peripheral pieces are contained and the fiber bundle of the outer side piece having the extending portion for the supporting portion is rolled up. The plurality of inner peripheral pieces are spaced apart from each other, and the support section is formed by compressing and flattening the support section extending section of the outer section piece between the inner peripheral section pieces. Three-dimensional fabric for fitting materials. 4. The three-dimensional woven fabric for fittings according to claim 1 or 2, wherein a fiber bundle of an outer side piece having an extension portion for a support portion is wound in a state of including a single inner peripheral portion piece. Then, by extending the support portion extension portion from the winding portion of the outer portion piece wound around the inner peripheral portion piece to one side, and compressing and flattening the end portion in a bent state, the support portion is formed. A three-dimensional woven fabric for fitting material, characterized in that 5. A method for producing a three-dimensional woven fabric for reinforcing a fitting material, wherein a supporting hole portion and a supporting portion for supporting the supporting hole portion are integrally connected to each other, the inner peripheral piece of the supporting hole portion. Forming a tubular shape by winding a fiber bundle, and an outer side in which a winding portion wound around the inner peripheral piece and a support portion extending portion for forming the support portion are continuously provided. The pieces
A step of forming the inner peripheral piece by winding the fiber bundle while enclosing the inner peripheral piece, and bringing the winding part of the outer side piece into close contact with the periphery of the inner peripheral piece and obtaining an extension part for a supporting part. And a step of compressing and flattening into the shape of the supporting portion, and a filler is interposed in a space generated in the extending portion for the supporting portion to be compressed and flattening or between the supporting portion extending portion and the inner peripheral piece. The method for weaving a three-dimensional woven fabric for fittings, comprising: 6. The method for manufacturing a three-dimensional woven fabric for fittings according to claim 5, wherein one or both of the support hole portion and the support portion for supporting the support hole portion intersects the wound fiber bundle. A method for weaving a three-dimensional woven fabric for fittings, comprising the step of inserting a reinforcing rod formed by binding and hardening fiber bundles in a matrix in a direction.