JPH10196889A - Method of manufacturing FRP pressure vessel - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce the weight while securing necessary functions of an FRP pressure vessel. SOLUTION: An FRP fiber 3a is wound around a gypsum mold 1 in a multilayer by a filament winding method to obtain an FR.
The P layer 3b is formed. The FRP layer 3b is thermally cured to form the hollow container body 3. The gypsum mold 1 is removed from the container body 3. A metal plating layer 5 is formed on the inner surface of the container body 3 to form a thin liner liner. The strength is secured by the container body 3 by the FRP layer 3b, and leakage of the contents is prevented by the lining liner by the metal plating layer 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an FRP pressure vessel used as a fluid storage tank or the like.

[0002]

2. Description of the Related Art FRP (fiber reinforced composite material) is lightweight, has a large specific strength (strength / density), is excellent in fracture toughness,
In addition, since it has a characteristic that it can withstand a large difference in temperature, it is used as various structural materials and corrosion-resistant coating materials.

When a pressure vessel such as a fluid storage tank is manufactured by winding an FRP, if the FRP fibers are separated from each other and a gap is formed, the internal fluid leaks from the gap and the function as a pressure vessel can be exhibited. Conventionally, FIG.
As shown in FIG. 1, a metal lining liner a is used. FRP fibers are wound around the outer periphery of the lining liner a in a multilayer by a filament winding method or the like.
The RP layer b is formed. c indicates a base.

[0004]

However, the above FRP
In the case of the pressure vessel, in order to further reduce the weight, the only alternative is to change the liner a or to reduce the thickness of the liner. However, there is a limit in reducing the weight by reducing the thickness.

[0005] Therefore, the present invention provides an FRP pressure vessel that can further reduce the thickness of the liner to obtain a lighter weight FRP pressure vessel.
An object of the present invention is to provide a method for manufacturing an RP pressure vessel.

[0006]

According to the present invention, in order to solve the above-mentioned problems, an FRP fiber is wound around the outer periphery of an inner mold to form a fiber.
An RP layer is formed, and then the FRP layer is heat-cured to form a container body. Further, the inner mold is removed from the inside of the container body, and thereafter, the inner surface of the container body is subjected to metal plating. A method of manufacturing an FRP pressure vessel in which a liner having a thin-film structure composed of a metal plating layer is formed by using the above method.

[0007] Since the liner has a thin film structure composed of a metal plating layer, it is a lightweight pressure vessel.

Further, when the metal plating layer is formed on the inner surface of the container body while rotating the container body at a constant speed, the metal plating layer is uniformly applied in the circumferential direction.

On the other hand, instead of forming a metal plating layer on the inner surface of the container main body, a thin resin layer is formed on the inner surface of the container main body by blow molding, whereby the thin resin layer is formed. Can be used as a liner.

When a resin layer is formed as a lining liner, if a powdery adhesive is applied to the outer surface of a resin material used for blow molding, the bonding strength of the resin layer to the inner surface of the container body can be improved. Can be further enhanced.

[0011]

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

FIGS. 1 (a), 1 (b), and 3 (c) show an embodiment of the present invention. First, as shown in FIG. In a state where the metal base 2 is combined with one end in the longitudinal direction, the FRP fiber 3a is wound in multiple layers by the filament winding method to form the FRP layer 3b up to the outer periphery of the gypsum mold 1 and the outer base of the base 2. To do.

Next, as shown in FIG. 1B, the FRP layer 3b is heat-cured to form a hollow container main body 3, and thereafter, the inside of the container main body 3 is formed by using water or the like. Gypsum mold 1 is removed from the container, leaving only the container body 3 and the base 2.

Thereafter, as shown in FIG. 1C, a plating irradiation nozzle 4 is inserted into the container body 3 through the base 2 and the container body 3 is rotated at a constant speed about its longitudinal axis. The metal plating layer 5 is formed by irradiating the inner surface of the container main body 3 with the metal ion beam 5a from the plating irradiation nozzle 4 and performing metal plating. As a result, an FRP pressure vessel is obtained in which an inner liner having a thin film structure made of the metal plating layer 5 is applied to the inner surface of the vessel body 3 made of the FRP layer 3b.

FRP manufactured by the manufacturing method of the present invention
The pressure vessel has sufficient strength because the vessel body 3 is formed of the FRP layer 3b. The leakage of the contents can be prevented by the liner.
Since it has a thin film structure made of, it is possible to provide an extremely lightweight pressure vessel. Further, the metal plating layer 5 is applied by rotating the container body 3 at a constant speed during the irradiation with the metal ion beam 5a.
The thickness becomes uniform in the circumferential direction.

Next, FIG. 2 shows another embodiment of the present invention. Instead of forming the metal plating layer 5 on the inner surface of the container body 3 in the above embodiment,
The thin resin layer 6 is formed on the inner surface of the container body 3 by blow molding.

That is, in a state where the container body 3 is formed by thermally curing the FRP layer 3b, the blow molding nozzle 7 with the plastic resin material 6a adhered to the tip end.
Is inserted into the container body 3 through the base 2 and high-temperature air 8 is blown into the resin material 6a from the blow-molding nozzle 7 to expand the resin material 6a like a balloon, so that the resin material 6a expands like a balloon. A thin film-shaped resin layer 6 is formed on the inner surface of the container main body 3 to produce an FRP pressure vessel having the resin layer 6 as a liner.

Even in the FRP pressure vessel manufactured by the method shown in FIG. 2, the weight reduction can be achieved by employing the thin (membrane) resin layer 6 as the lining liner. When a powdery adhesive is applied to the outer surface of the resin material 6a, the bonding strength of the resin layer 6 to the inner surface of the container body 3 can be further increased.

In the above-described embodiment, the case where the FRP fiber 3a is wound around the gypsum mold 1 by the filament winding method when forming the FRP layer 3b to be the container body 3 has been described. The method of applying metal plating to the inner surface of the container body 3 may employ a method other than the method of irradiating an ion beam. Of course, various changes can be made without departing from the scope.

[0020]

As described above, according to the method of manufacturing an FRP pressure vessel of the present invention, the following excellent effects are exhibited. (1) FRP fibers are wound around the outer periphery of the inner mold to form an FRP layer, and then the FRP layer is heat-cured to form a container body. Further, the inner mold is removed from the inside of the container body. Then, since the inner surface of the container body is subjected to metal plating to form a lining liner having a thin film structure composed of a metal plating layer, the strength can be ensured by the container body by the FRP layer, and the lining liner by the metal plating layer. Leakage of contents can be prevented, and an extremely lightweight FRP pressure vessel as a whole can be obtained. (2) By forming the metal plating layer on the inner surface of the container body while rotating the container body at a constant speed, the metal plating layer can be applied uniformly in the circumferential direction, and product quality can be improved. It can be further improved. (3) Instead of forming a metal plating layer on the inner surface of the container body, a thin resin layer is formed on the inner surface of the container body by blow molding, so that the thin resin layer is lined with the liner. And can contribute to weight reduction. (4) By applying a powdery adhesive to the outer surface of the resin material used for blow molding, the bonding strength of the resin layer to the inner surface of the container body can be increased, and higher reliability can be achieved. Can be obtained.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a method for manufacturing an FRP pressure vessel according to the present invention, and (a), (b), and (c) are schematic views each showing a manufacturing procedure.

FIG. 2 is a schematic diagram showing another embodiment of the present invention.

FIG. 3 is a schematic view showing an example of an FRP pressure vessel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gypsum mold (inner mold) 3 Container main body 3a FRP fiber 3b FRP layer 5 Metal plating layer 5a Metal ion beam 6 Resin layer 6a Resin material

Claims (4)

[Claims] 1. An FRP fiber wound around the outer periphery of an inner mold
An RP layer is formed, and then the FRP layer is heat-cured to form a container body. Further, the inner mold is removed from the inside of the container body, and thereafter, the inner surface of the container body is subjected to metal plating. FRP characterized by forming a lining liner having a thin film structure composed of a metal plating layer.
How to make a pressure vessel. 2. The method for manufacturing an FRP pressure vessel according to claim 1, wherein the metal plating layer is formed on the inner surface of the vessel body while rotating the vessel body at a constant speed. 3. A thin resin layer is formed on the inner surface of the container body by blow molding instead of forming the metal plating layer on the inner surface of the container body.
A method for manufacturing the FRP pressure vessel described in the above. 4. The method according to claim 3, wherein a powdery adhesive is applied to the outer surface of the resin material used for blow molding.
How to make an RP pressure vessel.