JP2005152225A - Fiber-reinforced synthetic resin formed article and golf club shaft - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fiber-reinforced synthetic resin formed article such as a golf club shaft, durable enough so that the excellent outer appearance can be maintained for a long period of time. <P>SOLUTION: The golf club shaft 2 has an intermediate layer 12 on the outside of a cylindrical main body layer 11. The intermediate layer 12 comprises a painted layer 16 on which ornament patterns are formed with color pigments, etc., and a colored layer 12 with a logo mark 17. The intermediate layer 12 is covered with a translucent outer layer 13 comprising a protection layer 18 formed with a glass fiber reinforced synthetic resin sheet 25. Since the layers constituting the golf club shaft 2 are protected by the highly durable outer layer 13 in this way, differently from a conventional shaft with the layer of ornament patterns or a logo mark formed on the surface of the shaft, the excellent outer appearance of the ornament patterns and the logo mark, etc. can be maintained for a long period of time. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fiber reinforced synthetic resin molded article such as a golf club shaft using carbon fiber, glass fiber or the like, and in particular, a fiber reinforced synthetic resin having improved durability such as a logo mark or a pattern formed on the surface. It relates to molded products.

  Manufactured as a fiber-reinforced synthetic resin molded product using a fiber-reinforced synthetic resin sheet (prepreg sheet) with a structure in which high-strength fibers such as carbon fiber and glass fiber are impregnated with a synthetic resin matrix such as epoxy resin and polyester resin. Golf club shafts are widely used. This type of shaft is manufactured by a sheet winding method. In this method, a fiber-reinforced synthetic resin sheet with fibers oriented in a predetermined direction is wound around a mandrel so that the fiber direction is the predetermined direction, and wrapping tape from the outside. The fiber-reinforced synthetic resin sheet is fastened and fixed, and then placed in an electric furnace or the like and fired to melt and solidify the impregnated fiber, thereby forming an integrated cylindrical shaft body.

Here, as shown in FIG. 4A, when the wrapping tape is peeled off from the molded shaft body 11, the wrapping tape mark 31 remains on the outer peripheral surface 111 thereof. In order to remove the wrapping tape mark 31, the outer peripheral surface 111 of the shaft body 11 is polished as shown in FIG. Thereafter, as shown in FIG. 4C, a colored layer 12 such as a decorative pattern or a logo mark is formed on the polished surface by painting or the like. For example, the colored layer 12 includes a coating layer 16 formed by applying a colored paint made of urethane resin, acrylic resin, epoxy resin, or the like with a spray or a brush, or a logo mark 17 printed on the surface of the coating layer 16. Contains. Recently, a colored layer using a polarizing paint is also known in order to give a high-class feeling. Patent Document 1 below proposes a colored layer subjected to ion plating.
Japanese Patent Laid-Open No. 11-276649

  Thus, in the conventional shaft, the colored layer 12 is formed in the outermost layer. Therefore, the colored layer 12 is likely to be worn and scratched and is easily peeled off. Therefore, there is a problem that the durability is poor and the aesthetic appearance cannot be maintained for a long time.

  An object of the present invention is to propose a fiber-reinforced synthetic resin molded article such as a highly durable shaft for a golf club that can maintain the appearance of the appearance for a long period of time.

In order to solve the above problems, the fiber-reinforced synthetic resin molded article of the present invention is
A cylindrical body layer formed from a fiber-reinforced synthetic resin sheet;
An intermediate layer including a colored layer formed on at least a part of the outer peripheral surface of the main body layer;
An outer layer covering the intermediate layer,
The outer layer includes a protective layer formed from a fiber-reinforced synthetic resin sheet that exhibits a transparent or translucent property after molding.

  Here, the said protective layer can be formed from a glass fiber reinforced synthetic resin sheet, for example.

  In addition, a colored fiber reinforced synthetic resin such as a pigment adhering layer made of titanium white, aluminum flakes, etc., a colored paint layer, a colored film layer, and an aramid fiber, the colored layer being attached to the outer peripheral surface of the main body layer It can be formed to include at least one of the layers formed from the sheet.

  Furthermore, it is desirable that the intermediate layer includes a porous layer made of a porous sheet such as a woven fabric covering at least a part of the outer peripheral surface of the colored layer in order to make the external appearance a characteristic design.

  Next, examples of the fiber-reinforced synthetic resin molded product according to the present invention include a golf club shaft.

  In the fiber reinforced synthetic resin molded article of the present invention, an intermediate layer including a decorative pattern formed by painting or a colored layer such as a logo mark is formed on the outer peripheral surface of the cylindrical main body layer, and this intermediate layer is a fiber reinforced synthetic resin. It is covered with an outer layer including a transparent or translucent protective layer formed from a resin sheet. Therefore, according to the present invention, since the colored layer is covered with a highly durable protective layer, unlike the conventional molded product in which the colored layer is exposed on the surface, the appearance of decorative patterns, logo marks, etc. It is possible to realize a highly durable fiber-reinforced synthetic resin molded product that can maintain the aesthetics of the product over a long period.

  A golf club to which the present invention is applied will be described below with reference to the drawings.

  1A and 1B are a front view of a golf club and a half sectional view of a shaft thereof. The golf club 1 includes an elongated cylindrical shaft 2 that is a fiber-reinforced synthetic resin molded product, a head 3 attached to the tip of the shaft 2, and a grip 4 attached to the rear end of the shaft 2. The shaft 2 has a small front end on the head side and a large rear end on the grip side, and the diameter between them gradually increases from the front end side toward the rear end side.

  The shaft 2 is formed of a cylindrical body in which a plurality of layers are concentrically formed, and a main body layer 11, an intermediate layer 12, and an outer layer 13 are formed in this order from the inside toward the outside. The main body layer 11 has an elongated cylindrical shape formed from a carbon fiber reinforced synthetic resin sheet. The intermediate layer 12 includes a coating layer 16 formed by coating a color pigment on a predetermined portion of the outer peripheral surface of the main body layer 11, a colored layer 14 including a logo mark 17 printed on the surface of the coating layer 16, and this coloring And a porous layer 15 made of a porous sheet such as a woven fabric covering the outer peripheral surface of the layer 14. The outer layer 13 includes a protective layer 18 formed from a fiber reinforced synthetic resin sheet covering the intermediate layer 12 and a transparent surface treatment layer 19 such as a clear coating covering the outer peripheral surface.

  Here, the protective layer 18 is formed using, for example, a glass fiber reinforced synthetic resin sheet that exhibits a transparent or translucent property after molding. For this reason, the outer layer 12 composed of the protective layer 18 and the surface treatment layer 19 is transparent or translucent. Therefore, the decorative pattern and the logo mark formed by the colored layer 14 and the porous layer 15 covered with the outer layer 12 can be seen from the outside.

  FIG. 2 is a schematic flowchart showing a manufacturing process of the golf club 1 with a focus on a manufacturing process of the shaft 2. FIG. 3 is an explanatory diagram showing a process of manufacturing the shaft 2 among the manufacturing processes of the golf club 1 shown in FIG.

  Referring to these drawings, when manufacturing the shaft 2, first, a carbon fiber reinforced synthetic resin sheet 21 for forming the main body layer 11 of the shaft 2 is prepared, and a core metal for winding this is prepared. A mandrel 20 is prepared (step ST1).

  And the main body layer 11 is formed by winding the fiber reinforced synthetic resin sheet 21 in the outer peripheral surface of the mandrel 20 several times (process ST2, FIG. 3 (a)). The sheet 21 has a predetermined fiber orientation direction at the time of winding.

  Next, a coating layer 16 is formed by applying a color pigment on a predetermined portion of the outer peripheral surface of the main body layer 11, and then a logo mark 17 is printed on the surface (step ST3, FIG. 3B). In this example, the coating layer 16 is formed to a thickness of 2 μm to 50 μm by applying a colored paint to the grip side portion on the outer peripheral surface of the main body layer, for example, by spraying. As the colored paint, a pigment obtained by dissolving a pigment such as titanium white or aluminum flake having excellent heat resistance in a solvent is used. In this way, the colored layer 14 including the coating layer 16 and the logo mark 17 is formed. Thereafter, a porous sheet 23 such as a woven fabric is prepared and wound so as to cover the outer peripheral surface of the coating layer 16 of the colored layer 14 to form the porous layer 15 (step ST4, FIG. 3C). ). In this way, the intermediate layer 12 including the colored layer 14 and the porous layer 15 is formed.

  As the coating layer 16, in addition to using the above-described color pigment, a paint obtained by impregnating the color pigment with a resin may be used.

  Next, a glass fiber reinforced synthetic resin sheet 25 is prepared and wound so as to cover the intermediate layer 12 to form the protective layer 18 (step ST5, FIG. 3 (d)). As a result, a cylindrical body 30 including the main body layer 11, the intermediate layer 12, and the protective layer 18 is formed.

  Next, a wrapping tape for fastening and fixing the cylindrical body 30 is wound from the outside to fix the cylindrical body 30. In this state, the cylindrical body 30 is placed in an electric furnace and fired (step ST6, FIG. 3). (E)). The main body layer 11, the pattern layer 12, and the protective layer 18 are integrated by melting and re-curing the synthetic resin that is the base material of the sheets 21 and 25 constituting the main body layer 11 and the protective layer 18 by firing. The formed cylindrical body 30 is formed. Moreover, the protective layer 18 becomes transparent by firing.

  Thereafter, the wrapping tape is peeled off from the integrated cylindrical body 30, and the outer peripheral surface of the cylindrical body 30 is polished to remove the wrapping tape mark 31. Thereafter, the mandrel 20 is pulled out (step ST7, FIG. 3 (f)).

  Next, a clear coating is applied to the polished surface of the cylindrical body 30 to form the surface treatment layer 19, and the shaft 2 is completed (step ST8, FIG. 3 (g)).

  A separately prepared head and grip are attached to the shaft 2 thus obtained, thereby completing the golf club (ST9).

  As described above, in the golf club shaft 2 of this example, the intermediate layer including the coating layer 16 formed of a coloring pigment or the like and the colored layer 12 such as the logo mark 17 on the outer peripheral surface 111 of the cylindrical main body layer 11. 12 is formed, and this intermediate layer 12 is covered with a transparent or translucent outer layer 13 including a protective layer 18 formed from a glass fiber reinforced synthetic resin sheet 25. Therefore, unlike conventional shafts in which the colored layer and logo mark printing part are exposed on the outer surface, these parts are protected by a highly durable outer layer 13, so that wear such as decorative patterns and logo marks, Peeling and the like can be prevented, and therefore, a highly durable golf club shaft 2 that can maintain the aesthetic appearance over a long period of time can be realized.

(Other embodiments)
In the colored layer 12, instead of the colored pigment coating layer 16, for example, a pigment adhesion layer made of titanium white, aluminum flakes, a colored film layer made of a resin film subjected to hologram processing, or the like, a colored aramid fiber, etc. A layer formed from a fiber-reinforced synthetic resin sheet, a layer formed from glass flakes on which a metal film is formed by a sputtering method, or the like may be formed. Moreover, it is also possible to form the colored layer 12 having a characteristic design by combining these layers.

  Furthermore, the present invention can be applied to, for example, fishing rods, bicycle frames, and the like in addition to the above-described golf shaft.

(A) is a front view of the golf club to which this invention is applied, (b) is a half sectional view of the shaft. 2 is a flowchart showing a manufacturing method of the golf club shown in FIG. FIG. 3 is an explanatory diagram showing a process for manufacturing the shaft 2 among the manufacturing processes for the golf club 1 shown in FIG. 2. It is explanatory drawing for demonstrating the problem of the shaft for golf clubs in the past.

Explanation of symbols

1 Golf club 2 Shaft (fiber reinforced synthetic resin molded product)
3 Head 4 Grip 11 Shaft body layer 12 Shaft intermediate layer 13 Shaft outer layer 14 Colored layer 15 Porous layer 16 Coating layer 17 Logo mark 18 Protective layer 19 Surface treatment layer 20 Mandrel 21 Carbon fiber forming the body layer Reinforced synthetic resin sheet 23 Porous sheet 25 forming porous layer Glass fiber reinforced synthetic resin sheet 30 forming protective layer Cylindrical body

Claims (5)

A cylindrical body layer formed from a fiber-reinforced synthetic resin sheet;
An intermediate layer including a colored layer formed on at least a part of the outer peripheral surface of the main body layer;
An outer layer covering the intermediate layer,
The outer layer is a fiber reinforced synthetic resin molded article including a protective layer formed from a fiber reinforced synthetic resin sheet exhibiting a transparent or translucent property after molding. In claim 1,
The fiber reinforced synthetic resin sheet of the protective layer is a fiber reinforced synthetic resin molded article which is a glass fiber reinforced synthetic resin sheet. In claim 1 or 2,
The colored layer is
A pigment adhesion layer composed of titanium white, aluminum flakes and the like adhered to the outer peripheral surface of the main body layer;
Coating layer of colored paint,
A colored film layer, and
A fiber-reinforced synthetic resin molded article comprising at least one of layers formed from colored fiber-reinforced synthetic resin sheets such as aramid fibers. In any one of claims 1 to 3,
The intermediate layer is
A fiber-reinforced synthetic resin molded article comprising a porous layer made of a porous sheet such as a fabric covering at least a part of the outer peripheral surface of the colored layer.   A golf club shaft, which is a fiber-reinforced synthetic resin molded product according to any one of claims 1 to 4.

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