JP3178624B2 - Rod and method of manufacturing rod - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rod and a method of manufacturing the rod.

[0002]

2. Description of the Related Art Conventionally, in order to manufacture a rod of this type, a prepreg made by impregnating a reinforcing fiber such as carbon fiber with a thermosetting resin such as phenol is wound around a mandrel to form a rod material. At the same time, a forming tape such as polyester or polypropylene for molding is spirally wound around the outer surface of the rod material and fired. After firing, the forming tape is peeled off, and the outer surface of the rod material from which the forming tape is peeled is painted. I was

[0003]

In the case of the above-mentioned manufacturing method, when the coating is applied, the surface is polished in order to improve the adhesion of the coating. However, since the uneven surface formed by winding the molding tape is smoothed by surface polishing, it has not been possible to solve the problem that thread entanglement easily occurs. In other words, since the surface is smoothed by the surface polishing, the moisture attached to the surface is retained by the surface tension, and the thread is easily entangled due to the catch of the thread at the polka dot portion. In addition, the gas generated from the inside of the prepreg when fired escapes from the rod material, and the pinhole formed may emerge on the surface due to surface polishing processing, so underfill to fill the pinhole , Which has increased the labor required for the work. SUMMARY OF THE INVENTION An object of the present invention is to provide a rod capable of effectively suppressing thread entanglement while reducing the time and effort at the time of manufacturing, and a method of manufacturing the rod.

[0004]

According to the first aspect of the present invention, a coating material is formed on the outer peripheral surface of a rod material (5) formed by winding a prepreg, thereby forming a coating layer (6). Forming an uneven surface by winding and pressing on the outer peripheral surface of the paint layer (6) so that the forming tape (7) is folded;
After baking in a state in which the molding tape (7) is wound, the molding tape (7) is removed to form the uneven surface. The operation and effect are as follows.

[0005]

According to the structure in which the paint layer is first formed on the outer peripheral surface of the rod material, the outer peripheral surface of the rod material hardly has an uneven surface formed by winding and pressing a molding tape. Even if an uneven surface is formed, it only occurs at the film thickness portion of the paint layer. Therefore, in order to apply the paint, surface polishing as a base treatment is not required, or it may be performed only in the extreme surface layer, and it is conventionally not necessary to make the pinholes float on the surface, which is conventionally required. The undercoating process for filling the pinhole is not required, and the manufacturing process can be simplified. In addition, because the uneven surface is formed by winding a molding tape around the paint layer, a desired colored surface can be obtained without polishing the surface, and the uneven surface remains in a product state, and the yarn is entangled. Can be reduced.

[0006]

As a result, it is possible to obtain a good material in terms of suppressing the yarn entanglement and simplifying the manufacturing process by simply making a simple change by simply exchanging the paint layer and the uneven surface. It can be provided, and the problem of the rod becoming heavy due to the undercoating process can be solved.

[0007]

According to a second feature of the present invention, a prepreg is wound around a mandrel (1) to form a rod material (5), and a paint is applied to an outer peripheral surface of the rod material (5). Forming a coating layer (6), and forming an uneven surface by winding and pressing on the outer peripheral surface of the coating layer (6) so that the forming tape (7) folds over the outer surface of the coating layer (6). The tape (7) is fired in a wound state, and after the firing, the molded tape (7) is removed to form the uneven surface. The operation and effect are as follows.

[0008]

In addition to the function similar to the function of the first invention, since a molding tape is wound over the paint layer and baked, a tightening force is applied to the paint layer and the strength against peeling of the paint film can be improved.

[0009]

As a result, it is possible to obtain a good material in terms of suppressing the yarn entanglement and simplifying the manufacturing process by simply making a simple change by simply exchanging the paint layer and the uneven surface. In addition to the provision, it is possible to prevent the rod from becoming heavy due to the undercoating process, and at the same time, it is possible to bring about the effect of baking coating on the coating film, and to maintain a stable coating effect for a long time.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1A, a method of forming a rod using a mandrel 1 will be described step by step. As shown in FIG. 1B, a prepreg in which carbon-based reinforcing fibers are arranged in the circumferential direction is wound around the mandrel 1 as a first layer 2. As shown in FIG. 1C, a prepreg in which carbon-based reinforcing fibers are aligned in the axial direction is wound as the second layer 3. As shown in FIG. 1 (d), a prepreg in which carbon-based reinforcing fibers are aligned in the circumferential direction is wound as a third layer 4,
The rod material 5 is formed. To wind the above layers around the mandrel 1, set the prepreg on the platen,
The mandrel 1 is placed on the prepreg, and the mandrel 1 is rotated around the axis of the prepreg together with the prepreg to be wound and formed. As shown in FIG. 1 (e), urethane coating is performed by spraying on the surface of the rod material 5 to form a paint layer 6.
In the paint layer 6, a colored paint layer 6A is applied to the inside and a clear paint layer 6B is applied to the outside. As shown in FIG. 1F, a molding tape 7 made of polyester or the like is wound around the outer peripheral surface of the paint layer 6 in a spiral shape and fired. After firing, as shown in FIG. 1H, the molding tape 7 is peeled off, and the rod material 5 is cut into a predetermined length to obtain a rod. In the clear paint layer 6B on the surface of the rod thus formed, as shown in FIG. 1 (g), a concave portion corresponding to the folded portion of the molding tape 7 is formed in a spiral shape to form an uneven surface, Exhibits the function of suppressing thread entanglement. The resin used for the rod formed by the above-described manufacturing method is a thermosetting resin such as phenol, and this resin is used in an amount of about 23 to 35% by weight of the entire prepreg with respect to the reinforcing fiber such as carbon fiber. The prepreg is formed by impregnation. This prepreg has a lower resin than commonly used prepregs (38% to 45%).
Gas generation from the resin during firing is small, and it is considered that pinholes and the like are hardly generated during firing. Even if the coating is applied and the molding tape 7 is further wound thereon, the effect is smaller than that of the high resin prepreg. Can be

[Other Examples] As the prepreg, other thermosetting resins can be used, and if circumstances permit, a thermoplastic resin can also be used.
In addition, glass fibers other than carbon fibers, boron fibers, and the like can be used as the reinforcing fibers. Although the prepreg is wound in a plurality of layers, the prepreg may be a single layer, and the direction of the reinforcing fibers is not limited to the direction described above. If at least only the first layer 2 is set in the circumferential direction, the second layer is formed. The third layer 4 may be in any of the circumferential direction and the axial direction. The prepreg may be not only one in which reinforcing fibers are arranged in one direction, but also one in which the reinforcing fibers are arranged in an orthogonal state. In order to form the colored paint layer 6A, a material obtained by mixing a dye or a pigment with a resin base material is used, but the following special material may be used. That is, a pigment that is oriented in one direction may be mixed into a highly transparent resin base material, and a pigment that develops a color using interference between reflected light from the pigment and visible light may be used. This pigment is obtained by coating the surface of natural mica with a high refractive index metal oxide such as titanium oxide or iron oxide.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 (a) Side view showing a mandrel (b) Side view showing a state in which a first layer is wound around a mandrel (c) Side view showing a state in which a second layer is wound (d) State in which a third layer is wound (E) Side view showing the state of applying the coating (f) Side view showing the state of winding the forming tape (g) Side view partially cut away showing the state of winding the forming tape (h) Forming Partially cutaway side view showing the tape peeled off

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mandrel 5 Rod material 6 Paint layer 7 Molding tape

Claims (2)

(57) [Claims] The outer peripheral surface of the 1. A rod material formed by winding a prepreg (5), together with the coating material is applied to form a coating layer (6), an outer peripheral surface of the paint layer (6), forming a tape (7) is formed by winding and pressing to form an uneven surface so as to be folded , and after baking in a state in which the molding tape (7) is wound,
A rod having the irregular surface formed by removing the molding tape (7) . Wherein to form a mandrel (1) by winding a prepreg on rod material (5), paint is applied to form the coating layer (6) on the outer peripheral surface of the rod material (5), the paint Forming tape (7) is folded on the outer peripheral surface of layer (6)
An uneven surface is formed by winding and pressing so as to overlap , and firing is performed with a forming tape (7) wound around the outer periphery of the paint layer (6). After the firing, the forming tape (7) is removed, and the uneven surface is removed. A method for manufacturing a rod for forming a rod.