JP2002046937A - Method and device for winding fiber on cylindrical body and fiber winding goods - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for winding fiber on a cylindrical body so that the fiber uniformly shares stress in inner and outer layers, and fiber winding goods. SOLUTION: In this device having a tensile force applying device 2 for applying prescribed tensile force to the traveling fiber and a winder 4 for circumferentially laminating and winding the fiber on the cylindrical body, the tensile force applying device 2 and the winder 4 are connected to a control device 5, and the control device is set so that tensile force of the fiber in the outer layer becomes smaller than tensile force of the fiber of the inner layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for winding a fiber around a cylindrical body and a fiber wound product obtained therefrom, and more particularly to a method for applying a resin to a fiber base material such as cellulose fiber, glass fiber and carbon fiber. The present invention relates to a filament winding for obtaining an FRP container or the like by winding an impregnated material around a cylindrical container body.

[0002]

2. Description of the Related Art Various tension controller devices have been proposed to keep the fiber tension at a constant value when forming an FRP container or the like by filament winding (FW).

First, Japanese Patent Laid-Open No. 7-16937 discloses a lever-type tension control mechanism as a tension controller mechanism capable of controlling tension with high accuracy. In this method, it is described that a lever-type tension control means is used, so that a space-saving structure can be achieved, and the tension can be set accurately.

Japanese Utility Model Laid-Open Publication No. 63-41067 discloses a tension control mechanism having a large feed roller as a mechanism of a tension controller for controlling the tension to be constant. In this method, it is possible to wind at a constant tension by using a mechanism having a large feed roller, a servomotor, a tension detector, and a roller held by a spring, and as a result, winding and unevenness are caused. It does not occur.

Further, Japanese Patent Application Laid-Open No. 6-328577 discloses that the fiber content of the inner layer is made lower than the fiber content of the outer layer, and the tension of the resin-impregnated continuous fibers at the time of forming the inner layer is controlled at the time of forming the outer layer. A fiber-reinforced resin tubular body characterized by lowering the tension than resin-impregnated continuous fibers and a method for producing the same are disclosed. In this method, the fiber content of the inner layer is made lower than the fiber content of the outer layer, and the tension of the resin-impregnated continuous fibers at the time of forming the inner layer is made lower than the tension of the resin-impregnated continuous fibers at the time of forming the outer layer. It is described that an FW method FRP tubular body having excellent properties can be manufactured.

[0006]

However, the content disclosed in Japanese Patent Application Laid-Open No. Hei 7-16937 is a tension control method capable of accurately setting a tension.
The method disclosed in No. 67 is a method for controlling the tension to be constant, and is a method for keeping the tension accurately at a target value, and does not extend to the relationship between the tension of the fibers of the inner and outer layers.

[0007] Further, in the content disclosed in Japanese Patent Application Laid-Open No. 6-328577, the weeping resistance of the FRP pipe is improved by keeping the outer tension greater than the inner tension in the control of the tension. However, in this method, since the tension of the inner FRP layer is smaller than the tension of the outer layer, the fibers of the inner layer are slackened, and the tension cannot be shared equally between the inner and outer layers. Such a problem cannot be solved even by Japanese Patent Application Laid-Open No. 7-16937 and Japanese Utility Model Application Laid-Open No. 63-41067.

The present invention solves the above-mentioned problems, and provides a fiber winding method and apparatus and a fiber wound product in which the fibers of the inner layer can share the stress evenly without being loosened by the winding tension of the outer layer. The purpose is.

[0009]

In order to achieve the above object, the present invention provides a tension applying device for applying a predetermined tension to a running fiber, and a lamination winding of the fiber around a cylindrical body. In a device having a winding winding device, a tension applying device and a winding device are connected to a control device, and the control device is set so that the tension of the fiber in the outer layer is smaller than the tension of the fiber in the inner layer. It is characterized by having. After the fiber is given a predetermined tension by such a device, the winding device winds the fiber so that the outer layer fiber has a lower tension than the inner layer fiber.

The relationship between the tension of the outer layer and the fiber of the inner layer is as follows: when the tension of the outer layer is T1, the diameter is D1, the tension of the inner layer is T0, and the diameter is D0, T1 × (D1 / 2) ≦ T0 It is preferable to satisfy the relationship of × (D0 / 2).

Further, according to the present invention, a resin impregnating device for impregnating the resin with the fiber can be provided at a position before the winding device, whereby the fiber impregnated with the resin is wound on the cylindrical body. Turned.

[0012]

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

FIG. 1 is a schematic structural view of a fiber winding apparatus for manufacturing a fiber wound product, for example, an FRP tubular body by the FW method.

This apparatus comprises a fiber roving device 1 for feeding out a fiber base material, a tension applying device 2 for applying a predetermined tension to the fiber base material, a resin impregnating device 3 for impregnating the fiber base material with a resin, and a fiber formed into a cylindrical body. A winding device 4 for winding is arranged in order, and further has a control device 5 for controlling the tension applying device 2 and the winding device 4.

The fiber roving device 1 has, for example, a fiber base material wound in a roll shape on a bobbin or the like, and this fiber base material is drawn out toward the tension applying device 2.

The tension applying device 2 is provided with a tension roller for applying a predetermined tension to the fiber drawn from the fiber roving device 1 during running. The tension roller itself moves and displaces the fiber to the side, thereby adjusting the tension of the fiber, and the displacement amount, that is, the tension is variable. This displacement amount is determined by a command from the control device 5.

The resin impregnating device 3 has a liquid tank for accommodating a resin liquid, and is impregnated with resin when the fiber passes through the liquid tank while traveling.

Next, in the winding device 4, for example, a cylindrical body such as a container base (liner) is rotatably supported. Here, the resin is circumferentially wound on the cylindrical body, and the lamination of the fibers is performed. Form. The winding device 4 also receives a command from the control device 5 and controls the winding conditions.

Thus, after the resin is impregnated with the resin, the fiber is wound circumferentially around the cylindrical body to form a laminate, and the controller 5 controls the tension applying device 2 and the winding device 4 to control the tension of the outer layer fiber. Is adjusted to be smaller than the tension of the fibers in the inner layer. By doing so, the fibers in the inner layer are not loosened, and the stress is equally distributed between the inner and outer layers.

Preferably, as shown in the figure, when the tension of the outer layer is T1, the diameter is D1, the tension of the inner layer is T0, and the diameter is D0, T1 × (D1 / 2) ≦ T0 × (D0 / 2) Adjust so as to satisfy the relationship of

Table 1 shows the results of a destruction test of the FRP container molded by using the tension control method of the present invention shown in FIG. 1 and the conventional FRP container molded by a constant tension. The fibers used are E glass and the resin is epoxy resin. The FRP container performs hoop winding (circular winding) and helical winding (cross winding) on an aluminum liner.
The circumferential direction and the axial direction of the RP layer were strengthened. The initial outer diameter of the liner was 400 mm, the circumferential winding (hoop winding) was two layers, and the helical winding (cross winding) was one layer. Circular winding, helical winding, and circumferential winding were performed in order from the inner layer.
The diameter of the circumferential winding of the inner layer was 400 mm, and the diameter of the circumferential winding of the outer layer was 420 mm. 1.5kg inner layer tension
The tension of the outer layer was controlled to 1.43 kg / piece by slightly reducing the tension of the inner layer according to the present invention. For comparison, in the prior art, the tension was controlled to 1.5 kg / piece for both the inner and outer layers. Here, 1.5 kg / piece indicates that the tension is controlled to 1.5 kg per one fiber roving.

Table 1 shows the results of the destruction test of the molded article. The burst pressure of the molded article of the present invention was 900 kg / cm ² , the burst pressure of the molded article of the prior art was 750 kg / cm ² , Burst pressure was 20% higher than that of.

[0023]

[Table 1]

Table 2 shows the resin content of the molded article. In the molded article of the present invention, the resin content of the inner layer and the outer layer is the same as the control value and does not change in both the inner layer and the outer layer. The resin exudes to the outer layer, and as a result, the resin content of the inner layer is 38%, the resin content of the outer layer is 42%, and the control value is 40%.
Will change from.

[0025]

[Table 2]

[0026]

As described above, according to the present invention, the tension of the outer layer is made smaller than that of the inner layer.
In the molded product, the circumferentially wound fibers of the inner and outer layers function evenly, so that the burst pressure can be higher than that of the conventional FRP container. In addition, since the resin content of the inner layer and the outer layer does not change from the control value, a decrease in strength due to lack of resin in the inner layer can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an apparatus according to an embodiment of the present invention.

FIG. 2 is a view showing a state of tension of a fiber wound product in which fibers are wound by the apparatus of FIG. 1;

[Explanation of symbols]

 2 tension applying device 3 resin impregnating device 4 winding device 5 control device

Claims (9)

[Claims] In a method of applying a predetermined tension to a running fiber and laminating and winding the fiber around a cylindrical body, the tension of the fiber in the outer layer is made smaller than the tension of the fiber in the inner layer. A method of winding a fiber around a cylindrical body. 2. When the tension of the outer layer is T1 and the diameter is D1, and the tension of the inner layer is T0 and the diameter is D0, the relationship of T1 × (D1 / 2) ≦ T0 × (D0 / 2) is satisfied. The method for winding a fiber around a cylindrical body according to claim 1. 3. The method of winding a fiber on a cylindrical body according to claim 1, wherein the fiber is impregnated with a resin before winding the fiber. 4. An apparatus comprising: a tension applying device for applying a predetermined tension to a running fiber; and a winding device for laminating and winding the fiber around a cylindrical body. An apparatus connected to a control device, wherein the control device is set so that the tension of the fibers in the outer layer is smaller than the tension of the fibers in the inner layer. 5. The controller according to claim 1, wherein the tension of the outer layer is T1, the diameter of the outer layer is D1, the tension of the inner layer is T0, and the diameter of the inner layer is D0: T1 × (D1 / 2) ≦ T0 × (D0 / 2) The apparatus for winding a fiber around a cylindrical body according to claim 4, wherein the apparatus is controlled so as to satisfy the relationship. 6. The fiber winding device for a tubular body according to claim 4, wherein a resin impregnation device for impregnating the fiber with a resin is provided at a position before the winding device. 7. A fiber wound product in which fibers are laminated and wound around a cylindrical body in a circumferential winding, wherein the tension of the fibers in the outer layer is smaller than the tension of the fibers in the inner layer. Goods. 8. The fiber has an outer layer tension T1 and a diameter D1.
The fiber winding according to claim 7, wherein, when the tension of the inner layer is T0 and the diameter is D0, a relationship of T1 × (D1 / 2) ≦ T0 × (D0 / 2) is satisfied. Goods. 9. The wound fiber article according to claim 8, wherein the fiber is impregnated with a resin.