JPS615926A - Manufacture of fiber reinforced resin structure - Google Patents

Abstract

PURPOSE:To obtain subject structure of high strength by winding a fiber reinforced resin linear body consisting of carbon fiber etc. over a mold or frame and, subsequently, by laminating the same immediately before lamination while heating and softening the linear body during the process of lamination. CONSTITUTION:A reinforced resin linear body 6 is formed by impregnating or coating a continuous fiber bundle or fiber strip such as carbon fiber, glass fiber etc. with a resin such as an epoxy resin and etc. Then, the reinforced resin linear body 6 is supplied to a mold for a structural body or vicinity over a frame 1, and the frame 1 is moved while being revolved in the direction indicated by an arrow A, and the above linear body 6 is wound on the frame 1 while being pushed by a pressure roller 3. Subsequently, a wound layer 8 of the linear body is heated and softened by a heating device 7a of an infrared heater etc. immediately before or during the process of lamination, and by laminating wound layers 8 one after another subject structure is obtained.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to reinforcing fiber reinforced resin (FRP) filaments, particularly recently developed continuous fiber bundles or string fibers such as carbon fibers and glass fibers. The present invention relates to a method for manufacturing a fiber-reinforced resin structure in which a fiber-reinforced resin filament is wound and laminated by impregnating or coating the fiber-reinforced resin structure with a resin.

As shown in Figure 1, a method has been devised in which a continuous linear body of resin-impregnated fibers is wound around a mold or frame, and the wound layers of the linear body are laminated to produce a structure of a desired shape. , already known. Then, using this manufacturing method, the recently developed continuous fibers such as carbon fibers and glass fibers are impregnated or coated with resin, and the filamentous fiber-reinforced resin is wrapped around a mold or frame. It is believed that it is possible to manufacture a fiber-reinforced resin structure by rolling and laminating. However, in this manufacturing method, when the wound layers of fiber-reinforced resin filaments are laminated, air is trapped between the wound layers due to the viscosity of the impregnated (coating) resin, and air bubbles remain trapped in the structure. , the interlayer shear force of the fiber-reinforced resin structure decreases, making it impossible to obtain sufficient strength.

(Object of the Invention) The present invention has been made in consideration of the above circumstances, and its purpose is to use continuous fiber bundles or string-like fibers such as carbon fiber as a reinforcing material to achieve sufficiently high strength. An object of the present invention is to provide a method for manufacturing a fiber-reinforced resin structure that can manufacture a fiber-reinforced resin structure having the following characteristics.

(Structure of the Invention) The method for manufacturing a fiber-reinforced resin structure of the present invention includes carbon fibers,
A fiber-reinforced resin filament made by impregnating or coating a continuous fiber bundle or string-like fiber (hereinafter collectively referred to as a strand) with resin, such as glass fiber, is wound around a mold or frame for a structure. This method is characterized in that the wound layers of the filament are laminated, and the heating removal device is used to heat and soften the fiber-reinforced resin filament just before or during lamination. That is, the present invention uses a heating device to heat a continuous filament of fiber-reinforced resin just before or during lamination,
The impregnation or coating resin is softened to increase its fluidity so that the fiber-reinforced resin filaments can be laminated in close contact with each other without introducing air. The heating device in the present invention may be any device that softens the resin impregnated or covered with this type of fiber-reinforced resin filament and reduces its viscosity, such as an electric heater, an infrared heater, a heating cylinder, a heating coil, a heating roller, etc. can be applied.

(Example) In the following, the embodiments of the present invention will be described with reference to drawings. All of the embodiments will be explained in the case of manufacturing a rectangular pipe made of fiber-reinforced resin. This book can also be applied to the production of other fiber-reinforced resin structures such as drums.

Embodiment 1 In FIG. 1, reference numeral 1 indicates a frame for a rectangular pipe, which is formed by assembling two frame members of the same shape orthogonally to each other, and this frame 1 is rotatable about an axis 2. and is supported so as to be movable in a direction perpendicular to this rotation plane,
Kaku (not shown)! Due to the operation of the +IIl device, arrow A in the figure
It is designed to be sent in a direction perpendicular to this plane of rotation while rotating in a circular direction. A pressure roller 6 is rotatably supported above the frame 1 via a support arm 4, and this roller 5 is configured to be pressed downward by its own weight and weight 5. . Then, a fiber-reinforced resin filament 6 in which a continuous strand of carbon fiber or the like is impregnated or carded with resin, for example, epoxy resin, is supplied to the underside of the pressure roller 5 and can be wound around the frame 1. ing. Further, in this embodiment, as shown in an enlarged view in FIG. 2, a heating device 7a of a heating heater is attached near the pressure roller 6 toward the side of the fiber-reinforced resin filament body to be supplied. This trap is designed to heat the fiber-reinforced resin filament 6 just before being wound.Thus, the fibre-reinforced resin filament 6 impregnated with resin or coated with the resin is supplied near and above the frame 1. Then, the frame body 1 is moved while rotating nine times in the direction of the arrow, and the fiber-reinforced resin filament body 6 is wound around the frame body 1 while being pressed by the pressure roller 6 to form a wound layer 8 of the strand. are sequentially laminated, and at this time, the fiber-reinforced resin filament 6 immediately before lamination is heated 17 with a heating device 7a to be laminated (Fig. 2), and after sintering, the fiber-reinforced resin laminate is cured and the frame 1 is removed. A rectangular pipe made of fiber-reinforced resin can be manufactured from K. In this example,
When the fiber-reinforced resin strands are heated just before lamination, the resin impregnated or coated with the strands softens and increases its fluidity, so the fiber-reinforced resin strands can be stacked together without introducing air. The pipes can be laminated in close contact with each other, and no air bubbles remain in the square pipes of the laminate. Therefore, Example 1
The rectangular vibrator obtained by the manufacturing method had sufficiently high strength.Example 2 As shown in FIG.
A heating device 7b of one cylindrical heating cylinder is used instead of a.
The fiber-reinforced resin filament 6 to be supplied is inserted therethrough and attached, thereby heating the fibre-reinforced resin filament just before being laminated. The other configurations are the same as in the first embodiment.

Accordingly, in this example, the filament-reinforced resin filament 6 impregnated with resin or ruptured is heated and softened by a heating device 1t7b immediately before lamination, and then laminated immediately in the same manner as in Example 1. , it is possible to manufacture a rectangular pipe made of fiber-reinforced resin without introducing air between the filaments. As a result, the square pipe obtained by the manufacturing method of Example 2 also had sufficiently high strength. Furthermore, in the manufacturing method of Example 2, the fiber-reinforced resin filament immediately before lamination is heated almost uniformly from all lateral directions, so the resin impregnated (coated) in the filament is softened quickly, and It has the advantage that the frame body 1 can be wound at high speed and the productivity of the large rectangular fiber-reinforced resin pipe is high.

Embodiment 5 As shown in FIG. 4, in this embodiment, the pressure roller 6,
Instead of the heating device 1i7a, a pressure roller 3a with a built-in heating device 7C of a cylindrical heater is used to heat the fiber-reinforced resin filament being laminated.0Other configurations is the same as in Example 1.

Therefore, in this embodiment, a rectangular fiber-reinforced resin pipe is manufactured without leaving any air bubbles inside by laminating the fiber-reinforced resin filament 6 after resin impregnation or coating at the same time as heating by the heating device 7C. can do. As a result, the square pipe obtained by the manufacturing method of Example 3 also had sufficiently high strength. The manufacturing method of Example 6 is as follows:
This is a method of heating with a pressure roller 3a that presses the fiber-reinforced resin filament, and the strand can be reliably heated, and since the fiber-reinforced resin filament that has already been laminated is also heated, This has the advantage that the adhesion between the fibre-reinforced resin filaments is further increased, and the produced rectangular pipe has extremely high strength.

(Effects of the Invention) As explained above, the method for manufacturing a fiber-reinforced resin structure of the present invention uses the heating device f to heat and soften the 11 rows of the laminated surface or the striated bodies of the fiber-reinforced resin in the lamination. By using this manufacturing method, the filaments can be laminated in close contact with each other without introducing air. Therefore, by using continuous strands such as carbon fiber as a reinforcing material, there are no air bubbles inside and it has sufficiently high strength. A fiber reinforced resin structure can be manufactured. In addition, the manufacturing method of the present invention is more effective than the method of laminating fiber-reinforced resin filaments in a heated atmosphere.
(Coating) Since the total amount of heat transmitted throughout the resin is small, it is useful when using a resin with a short pot life or when laminating fiber-reinforced resin filaments over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an apparatus useful for carrying out the method for manufacturing a fiber-reinforced resin structure according to Example 1 of the present invention, and FIG. 2 is a diagram showing a fiber-reinforced resin striated body according to the surface manufacturing method of Example 10. Figure 6 is a diagram showing the lamination state of the fiber-reinforced resin wire medium by the manufacturing method of Example 2, Figure 4 is the lamination state of the fiber-reinforced resin wire core by the manufacturing method of Example 6. In Figure 0, which is a diagram showing the state, 1... Frame 6... Fiber-reinforced resin filament 7 a, 7 b, 7 c - Heating device 8... Winding layer

Claims (1)

[Claims] In a method for manufacturing a fiber-reinforced resin structure in which a filament body impregnated with resin is wound around a fiber bundle or string-like fiber of reinforcing long fibers and laminated, continuous fiber bundles such as carbon fibers, glass fibers, or A fiber-reinforced resin filament, which is a string-like fiber impregnated or coated with resin, is wound around a mold or frame for a structure, and the wound layers of the filament are laminated, using a heating device. A method for manufacturing a fiber-reinforced resin structure, which comprises heating and softening the fiber-reinforced resin filament just before or during lamination.