TWI781876B - Golf club shaft and method of making the same - Google Patents

Abstract

The present invention provides a golf club body capable of ensuring peeling resistance of a colored layer that can withstand bending processing and the like. The golf club body includes: a metal unprocessed tube 3; and a colored plating layer 5 that is a colored layer formed on the surface of the unprocessed tube 3; Electroplating layer 9; Satin-finish electroplating layer 11, which is laminated on the surface of the first strike plating layer 9; Second strike plating layer 13, which is laminated on the surface of satin-finish electroplating layer 11; And decorative electroplating layer 15, its layer Accumulated on the surface of the second strike plating layer 13, and has a color corresponding to the color of the colored plating layer 5.

Description

Golf club shaft and manufacturing method thereof

The present invention relates to a golf club body with a non-processed metal tube covered with a colored electroplating layer and a manufacturing method thereof.

A golf club body composed of an unprocessed metal tube (hereinafter sometimes referred to as a "metal shaft") generally has a metallic color but a monotonous design, so it has a color other than the metallic color. Coloring needs. As a coloring technique for such a metal rod body, there is one described in Patent Document 1, for example.

In the technique of Patent Document 1, a nickel plating layer is formed on the surface of a metal raw pipe, a chromium plating layer is formed on the surface, and a colored anion plating layer is formed as a colored layer on the surface.

In this technique, the designability of the metal rod body can be improved by coloring. However, the painted colored layer has low adhesion, which causes peeling when bending a metal rod such as a push rod. [Prior art literature] [Patent Document]

[Patent Document 1] Japanese Utility Model Registration No. 3157018

The problem to be solved by the present invention is that the colored layer is easily peeled off during bending processing or the like.

The present invention provides a golf club body comprising: a metal raw tube; and a colored plating layer formed on the surface of the raw tube; the colored plating layer includes: a semi-glossy plating layer, It is laminated on the surface of the aforementioned unprocessed tube; the first impact plating layer, which is laminated on the surface of the aforementioned semi-gloss plating layer; the satin sensitive plating layer, which is laminated on the surface of the aforementioned first impact plating layer; the second impact plating layer An electroplating layer laminated on the surface of the aforementioned satin sensitive electroplating layer; and a decorative electroplating layer laminated on the outside of the aforementioned second impact electroplating layer and having a color corresponding to the color of the aforementioned colored electroplating layer.

Furthermore, the present invention provides a method for manufacturing a golf club body. In the first production line, the aforementioned semi-gloss electroplating layer is laminated on the surface of the aforementioned unprocessed tube, and the aforementioned second gloss electroplating layer is laminated on the surface of the aforementioned semi-gloss electroplating layer. A strike plating layer; in the second production line, the aforementioned satin-sensitivity plating layer is laminated on the surface of the aforementioned first strike plating layer, and the aforementioned second strike plating layer is laminated on the surface of the aforementioned satin-sensitivity plating layer; and In the third production line, the aforementioned decorative electroplating layer is laminated on the outer side of the aforementioned second strike electroplating layer.

According to the present invention, the peeling resistance of the colored layer that can withstand bending processing and the like can be ensured.

1: golf club body

1a: front end

1b: base end

3: Raw tube

3a: Straight pipe part

3b: Tapered tube

5: Colored electroplating layer

7: Semi-gloss electroplating layer

9: The first impact plating layer

11: Satin sense electroplating layer

13: The second impact plating layer

15: Decorative electroplating layer

17: Chromate treatment layer

19:Sealing electroplating layer

S: Scars

Fig. 1 (A) and Fig. 1 (B) are the side views of the golf club shaft of Embodiment 1 of the present invention; Fig. 1 (A) is the whole of the golf club shaft; (A) Partial enlarged representation.

Fig. 2 is a schematic longitudinal sectional view of the golf club body of Fig. 1 .

Fig. 3 is a schematic transverse cross-sectional view of the golf club shaft along line III-III in Fig. 2 .

Fig. 4 is a schematic cross-sectional view showing the layer structure of the colored plating layer of the golf club body of Fig. 3 .

5 is a schematic cross-sectional view showing a method of forming a colored plating layer on a golf club body.

Fig. 6(A) and Fig. 6(B) are photographs showing the state of the colored layer of the golf club body after the scratch test; Fig. 6(A) is an example product, and Fig. 6(B) is a comparative example product .

7 is a schematic cross-sectional view showing the layer structure of the colored plating layer of the golf club body according to Example 2 of the present invention.

The purpose of securing the peeling resistance of the colored layer that can withstand bending work, etc. is achieved by the layer structure of the colored plating layer that is a colored layer formed on the surface of a metal unprocessed pipe.

That is, the golf club body (1) includes: a metal unprocessed tube (3); and a colored plating layer (5) that is a colored layer formed on the surface of the aforementioned unprocessed tube (3); The layer (5) has: a semi-gloss electroplating layer (7), a first impact electroplating layer (9), a satin electroplating layer (11), The second strike electroplating layer (13) and the decorative electroplating layer (15). A semi-gloss electroplating layer (7) is laminated on the surface of the unprocessed pipe (3). The first impact electroplating layer (9) is laminated on the surface of the semi-gloss electroplating layer (7); the satin sensitive electroplating layer (11) is laminated on the surface of the first impact electroplating layer (9). The second impact electroplating layer (13) is laminated on the surface of the satin sense electroplating layer (11); the decorative electroplating layer (15) is laminated on the outside of the second impact electroplating layer (13), and has the same color electroplating layer (5) The corresponding color of the color.

And it can be the following composition: the unprocessed pipe (3) is made of steel; the semi-gloss electroplating layer (7), the first impact electroplating layer (9), the satin sense electroplating layer (11) and the second impact electroplating layer (13) are It is composed of nickel electroplating coating; the decorative electroplating layer (15) is composed of trivalent chromium electroplating coating.

And it can be the following composition: the decorative electroplating layer (15) is laminated on the surface of the second impact electroplating layer (13); the colored electroplating layer (5) has: a chromate treatment layer (17), which is laminated on the decorative electroplating layer The surface of layer (15).

And it can be the following composition: the colored electroplating layer (5) has: the sealing electroplating layer (19), which is laminated on the surface of the second impact electroplating layer (13); the decorative electroplating layer (15) is laminated on the sealing electroplating layer ( 19) Surface.

The color of the colored electroplating layer (5) can be matte black, silver or gray.

As the manufacturing method of the golf club body, electroplating can be performed through the first production line, the second production line and the third production line. In this case, in the first production line, the semi-gloss electroplating layer (7) is laminated on the surface of the unprocessed pipe (3), and the first strike electroplating layer (9) is laminated on the surface of the semi-gloss electroplating layer (7). ). In the second production line, a satin electroplating layer (11) is laminated on the surface of the first strike plating layer (9), and a second strike plating layer (13) is laminated on the surface of the satin electroplating layer (11). In the third production line, the decorative electroplating layer (15) is laminated on the outside of the second strike electroplating layer (13).

Example 1

[Structure of golf club body]

Fig. 1 (A) and Fig. 1 (B) are the side views of the golf club shaft of Embodiment 1 of the present invention; Fig. 1 (A) is the whole of the golf club shaft; (A) Partial enlarged representation. Fig. 2 is a schematic longitudinal sectional view of the golf club body of Fig. 1 . Fig. 3 is a schematic transverse cross-sectional view of the golf club shaft along line III-III in Fig. 2 . In addition, in Fig. 1(A) to Fig. 3, although the dimensions of each part are different, they basically have the same structure.

In the golf club shaft 1 of this embodiment, the axial front end 1a becomes the part where the golf club head is installed, and the axial base end 1b of the golf club shaft 1 becomes the part where the golf club handle is installed. part. This golf club body 1 is a metal shaft, and is configured to include an unprocessed tube 3 and a colored plating layer 5 .

The unprocessed tube 3 is a hollow tube, and its cross-sectional shape is circular in cross section. This unprocessed pipe 3 is made of metal, especially steel. However, the raw tube 3 can also be made of other metals, such as aluminum, titanium and their alloys.

The unprocessed pipe 3 of this embodiment has a stepped shape, and is formed by a plurality of straight pipe portions 3a and a plurality of tapered pipe portions 3b respectively connecting adjacent straight pipe portions 3a.

The straight pipe portion 3a is a portion having a constant wall thickness and inner and outer peripheral diameters. The straight pipe portion 3a on the base end 1b side has a larger inner and outer peripheral diameter and a thinner wall thickness than the straight pipe portion 3a on the front end 1a side.

Each tapered pipe part 3b absorbs the difference in diameter and the difference in wall thickness of the adjacent straight pipe part 3a. In each tapered pipe portion 3b, the inner and outer diameters gradually increase from the front end 1a side toward the base end 1b side and the wall thickness gradually becomes thinner. The axial length of the tapered pipe portion 3b is shorter than that of the straight pipe portion 3a.

In addition, the unprocessed pipe 3 is an example of the unprocessed pipe in which the colored plating layer 5 was formed. Therefore, the unprocessed pipe 3 is not limited to the stepped shape, and may have a straight pipe shape with a constant outer peripheral diameter or a tapered pipe shape as a whole. In addition, the thickness of the unprocessed tube 3 can be fixed or partially variable in the axial direction. In addition, the cross-sectional shape in the cross section of the unprocessed pipe 3 is not limited to a circle and can be appropriately selected as an ellipse or the like.

The colored plating layer 5 is a colored layer formed on the surface of the unprocessed tube 3 . Although the color of the colored electroplating layer 5 is matte black in this embodiment, it can also be other colors such as matte silver or matte gray.

FIG. 4 is a schematic cross-sectional view showing the layer structure of the colored plating layer 5 .

The colored electroplating layer 5 of this embodiment is sequentially laminated on the surface of the unprocessed tube 3 with a semi-gloss electroplating layer 7, a first impact electroplating layer 9, a satin-like electroplating layer 11, a second impact electroplating layer 13, a decorative electroplating layer 15 and Chromate treatment layer 17 is formed.

The semi-gloss electroplating layer 7 is composed of a semi-gloss electroplating film laminated on the surface of the unprocessed tube 3 . The material of the semi-gloss electroplating layer 7 corresponds to the material of the unprocessed tube 3 and can be nickel, copper, gold, tin, etc. The semi-gloss electroplating layer 7 in this embodiment is composed of a semi-gloss nickel electroplating film made of nickel.

In this semi-gloss plating layer 7, for example, it has a semi-gloss metallic (silver) appearance with a glossiness of about 0.3 to 0.5, a sulfur component content of about 0.005% to about 0.001%, and a thickness of 4 μm to 14 μm. , for example, becomes about 6.77 μm. However, the glossiness, sulfur content, thickness, etc. of the semi-gloss plating layer 7 are not limited thereto.

The first strike plating layer 9 is laminated on the surface of the semi-gloss plating layer 7 as a strike plating film on the raw pipe 3 side. The material of the first strike plating layer 9 can be nickel, silver, copper, gold, palladium, etc. according to the material of the semi-bright plating layer 7 or the satin-sensitive plating layer 11 . The first strike plating layer 9 in this embodiment is composed of nickel strike plating film made of nickel.

This first strike layer 9 has a metallic (silver) appearance. The sulfur content rate of the first strike plating layer 9 is about 0.1%, and the thickness of the first strike plating layer 9 is 0.1 μm to 0.3 μm, for example, about 0.24 μm, which is extremely thin. However, the sulfur content, thickness, and the like of the first strike plating layer 9 are not limited thereto.

The satin-finish plating layer 11 is laminated on the surface of the first strike plating layer 9 as a plating film of the satin-finish plating. The coating formed by satin-like electroplating has fine unevenness on the surface and has a velvety appearance. In addition, the satin finish plating will be mentioned later.

The material of the satin electroplating layer 11 can be nickel, cobalt, copper, etc. according to the materials of the first electroplating layer 9 and the second electroplating layer 13 . The satin-finish electroplating layer 11 of this embodiment is composed of a velvet nickel electroplating film made of nickel.

The satin electroplating layer 11 has a thickness of 4 μm to 14 μm, for example, about 9.89 μm, which is thicker than the first strike plating layer 9 and the semi-gloss plating layer 7 . In addition, the thickness of the satin electroplating layer 11 is not limited thereto. The surface of the satin-finish electroplating layer 11 has a matte or nearly matte appearance in a metallic color (silver color). The hardness of the satin plating layer 11 is lower than that of the first strike plating layer 9 and the second strike plating layer 13 .

The second strike plating layer 13 is a strike plating film laminated on the surface of the satin sensitive plating layer 11 , and in this embodiment, it is composed of the same nickel strike plating film as the first strike plating layer 9 . In addition, the term "same" means that specifications such as material and thickness are the same. In addition, the second strike plating layer 13 may be different from the first strike plating layer 9, and the material, thickness, and the like may be changed.

The decorative plating layer 15 is laminated on the outside of the second strike plating layer 13 , and in this embodiment is composed of a decorative plating film laminated on the surface of the second strike plating layer 13 . The decorative plating layer 15 has a color corresponding to the color of the colored plating layer 5 . Having a color corresponding to the color of the colored electroplating layer 5 refers to the hue after excluding the presence or absence of luster and metallic feeling. Therefore, in the case where the colored plating layer 5 is matte black, the decorative plating layer 15 has a black tone. In addition, the metallic feeling refers to a state in which the metallic color of the lower layer of the decorative plating layer 15 can be penetrated and seen.

The decorative electroplating layer 15 can be formed by trivalent chromium electroplating or tetravalent chromium electroplating. The decorative plating layer 15 of this embodiment is composed of a black trivalent chromium plating film. In addition, as the plating film of the black decorative plating, there are nickel plating, zinc plating, etc. other than trivalent chromium plating.

Furthermore, when the decorative plating layer 15 is a plating film of trivalent chromium plating, it may be white (silver) or gray. Gray refers to the intermediate color between black and white. When the decorative plating layer 15 is white, the colored plating layer 5 has a matte silver color, and when the decorative plating layer 15 is gray, the colored plating layer 5 has a matte gray color. The thickness of the decorative plating layer 15 is about 0.1 μm to 0.5 μm, for example, about 0.31 μm.

The chromate-treated layer 17 is composed of a chromate-treated plating film laminated on the surface of the decorative plating layer 15 . The chromate treatment layer 17 improves the corrosion resistance and discoloration resistance of the colored electroplating layer 5 . The chromate treatment layer 17 can be colorless and transparent or colored, and it is colorless and transparent in this embodiment. The chromate treatment layer 17 has a thickness of about 1 to several tens of μm.

[Production method] 5 is a schematic cross-sectional view showing a method of forming a colored plating layer on a golf club body.

When forming the colored electroplating layer 5 on the golf club shaft 1, as shown in Fig. 5(A), firstly, in the first production line, semi-gloss electroplating is deposited on the surface of the unprocessed tube 3 of the golf club shaft 1 Layer 7, and the first strike plating layer 9 is laminated on the surface of the semi-gloss plating layer 7.

Since the semi-gloss plating layer 7 is a plated film of semi-gloss nickel plating, semi-gloss nickel plating is applied to the unprocessed pipe 3 in forming the semi-gloss plating layer 7 . The semi-gloss nickel plating may be performed by a known method such as nickel plating in which a semi-gloss additive is added to a nickel plating bath. As the nickel plating bath, for example, one mainly composed of nickel chloride, nickel sulfate, and boric acid can be used.

As the semi-gloss agent, as long as it does not contain sulfur in the semi-gloss plating layer 7 (for example, the content rate is 0.05% or less in the measurement of X-ray fluorescence spectrometer), for example, Okuno Pharmaceutical Co., Ltd. ) System ACNA SL-MU, etc.

Make nickel sulfate 240-320 g/L, make nickel chloride 30-50 g/L, make boric acid 30-50 g/L, make ACNA SL-MU 1-3 ml/L as the nickel electroplating bath an example.

On this semi-bright electroplating layer 7, a first strike electroplating layer 9 is formed in the same first production line.

The first strike plating layer 9 is composed of a nickel strike plating film. Therefore, in forming the first strike plating layer 9 , nickel strike plating is performed on the raw pipe 3 having the semi-gloss plating layer 7 .

Nickel shock plating can be done by using a known method, for example, by using a shock bath mainly composed of nickel chloride and hydrochloric acid. The hydrochloric acid is 110±15 ml/L, and the nickel chloride is 270±30 g/L as an example of a shock bath. In the shock bath, boric acid or an anti-fog agent which functions as a buffer may be additionally added.

Through the formation of the first strike plating layer 9, the oxide coating film formed when the semi-gloss plating layer 7 dries is removed and at the same time, the re-formation of the oxide coating film is prevented, and the adhesion of the subsequent satin-finish electroplating layer 11 containing oil is improved. .

Next, as shown in FIG. 5(B), in the second production line, the satin-finish electroplating layer 11 is laminated on the surface of the first strike plating layer 9, and the second strike plating layer 13 is laminated on the surface of the satin-finish electroplating layer 11. .

The satin electroplating layer 11 is composed of a velvet nickel electroplating film, so when the satin electroplating layer 11 is formed, the raw tube 3 on which the first strike electroplating layer 9 has been formed is subjected to velvet nickel electroplating. The velvet nickel plating can be performed by using a known method, for example, by nickel plating using a velvet plating bath, which is a nickel plating bath mainly composed of nickel sulfate, nickel chloride, and boric acid. added additives.

Make nickel sulfate 270±25 g/L, nickel chloride 50±10 g/L, boric acid 35±5 g/L, velvet additive #50 30±8 ml/L, velvet additive # 30 is 2.5±0.5 ml/L as an example of velvet electroplating bath.

In addition, the satin plating includes plating that imparts a velvety appearance to a formed plating film, such as satin plating or velvet plating. As this satin finish plating, diamond satin manufactured by Uemura Kogyo Co., Ltd., Sachilite Nickel manufactured by JCU Co., Ltd., etc. are known, for example, in addition to velvet plating.

On this satin electroplating layer 11, a second strike plating layer 13 is formed in the same second production line.

The second strike plating layer 13 is the same as the first strike plating layer 9, so in the formation of the second strike plating layer 13, the first strike plating layer 9 is implemented and formed on the unprocessed tube 3 on which the satin sensitive plating layer 11 has been formed. When the same nickel impact plating.

The formation of the second strike plating layer 13 prevents the formation of an oxide plating film on the satin-finish electroplating layer 11 , and improves the adhesion between the oil-containing satin-finish electroplating layer 11 and the subsequent decorative electroplating layer 15 .

Next, as shown in FIG. 5(C), the decorative plating layer 15 is laminated on the surface of the second strike plating layer 13 in the third production line.

The decorative plating layer 15 is composed of a black trivalent chromium plating film. Therefore, in forming the decorative plating layer 15, black trivalent chromium plating is performed on the unprocessed tube 3 on which the second strike plating layer 13 has been formed.

The black trivalent chromium plating may be performed by a known method using a black trivalent chromium plating bath containing a trivalent chromium compound as a main component and adding an additive for black to the black trivalent chromium plating. As an example of black trivalent chromium plating, there is trivalent chromium graphite manufactured by Atotech Japan Co., Ltd. In addition, black trivalent chromium plating varies from black tones depending on the manufacturer, and there are also bluish black or reddish black.

When making the decorative plating layer 15 white (silver), white trivalent chromium plating may be performed instead of black trivalent chromium plating. In the white trivalent chromium plating, for example, a white trivalent chromium plating bath such as Trivalent chromium Plus manufactured by Atotech Japan Co., Ltd. is used. When making the decorative plating layer 15 gray, trivalent chromium plating can be performed using a plating bath whose color tone is adjusted to a black trivalent chromium plating bath. As an example of such a gray plating solution, there is TOP FINECHROME LG manufactured by Okuno Pharmaceutical Co., Ltd.

Finally, as shown in FIG. 5(D), a chromate treatment layer 17 is formed on the decorative plating layer 15 .

The chromate treatment layer 17 can be formed by conventional chromate treatment. As the chromate treatment, for example, the raw pipe 3 on which the decorative plating layer 15 has been formed is subjected to electrolytic chromate treatment using a chromate treatment solution mainly composed of a trivalent chromium compound.

In this way, when the chromate treatment layer 17 is formed, the colored electroplating layer 5 of the golf club shaft 1 is completed. In the finished colored electroplating layer 5, the semi-gloss electroplating layer 7 is a semi-gloss metallic color, the first and second impact electroplating layers 9 and 13 are metallic colors, the satin-finish electroplating layer 11 is a matte metallic color, and the decorative electroplating layer 15 is black, and the chromate treatment layer 17 is colorless and transparent, and becomes matte black as a whole.

When the decorative plating layer 15 is white (silver), it becomes matte silver as a whole, and when the decorative plating layer 15 is gray, it becomes matte gray as a whole.

[effect, etc.] In the golf club shaft 1 of this embodiment, the decorative plating layer 15 on the surface of the colored plating layer 5 is composed of a trivalent chromium plating film, so the colored plating layer 5 that is matte black and highly durable can be obtained. .

6(A) and 6(B) are photographs showing the state of the colored layer of the golf club body 1 after the scratch test, FIG. 6(A) is an example product, and FIG. 6(B) is a comparative example Taste. In addition, in FIG. 6, black and white are reversed and shown from the viewpoint of discrimination.

The example product is the golf club shaft 1 of this example, and the comparative example product is the same as a general golf club shaft, and a semi-gloss electroplating layer, a gloss electroplating layer, and a sealing electroplating layer are sequentially formed on the surface of the unprocessed tube. 1. After the decorative electroplating layer, a coating film layer as a colored layer is formed on the decorative electroplating layer. The semi-gloss electroplating layer, the gloss electroplating layer, and the sealing electroplating layer are nickel electroplating coatings with sealing properties (refer to Example 2 for details), the decorative electroplating layer is hexavalent chromium electroplating coating, and the coating mold is painted through black coating.

The scratch test was performed by rubbing these Example products and Comparative Example products against each other in a state where they crossed each other. As a result, no discernible scars were produced in the examples, whereas the discernible flaws S were produced in the comparative examples.

In addition, in the golf club body 1 of this embodiment, the peeling resistance of the colored layer that can withstand bending processing and the like can be ensured. In addition, peel resistance means the difficulty of peeling. In the golf club body 1 of the example product, no detachment was observed even in bending at a bending angle of 30 degrees with a curvature radius of 60 mm. On the other hand, in the golf club body of the comparative example product, peeling of the coating layer was observed in the same bending manner. In addition, bending is performed by pushing. In the golf club body for putting, there is primary bending and secondary bending, and there is a bending that requires a bending angle of about 5 to 25 degrees. Therefore, the golf club body 1 of the embodiment can be obtained from the above-mentioned Colored layer that can withstand bending requirements.

The stripping resistance of the product in this embodiment is that the adhesion between the semi-gloss electroplating layer 7 and the satin electroplating layer 11 is increased by the first strike plating layer 9, and the satin electroplating layer 13 is used to make the satin electroplating layer 13 conductive. The degree of adhesion between the plating layer 11 and the decorative plating layer 15 is increased.

And, because the first and second strike plating layers 9 and 13 have the same structure, the adhesion environment for the semi-gloss plating layer 7 and the decorative plating layer 15 on both sides of the layer direction of the satin-finish electroplating layer 11 is the same, and The interface damage between the satin sensitive electroplating layer 11, the semi-gloss electroplating layer 7 and the decorative electroplating layer 15 is respectively suppressed. In addition, the layer direction refers to the lamination direction of each layer of the colored plating layer 5 .

Moreover, the hardness of the first and second strike plating layers 9 and 13 is relatively low, which can make these first and second strike plating layers 9 and 13 become the connection between each layer and can make the colored plating layer 5 resistant to bending. Increased receptivity. Therefore, the colored plating layer 5 has a structure that strongly resists the bending of the golf club shaft 1 .

[Effect of Embodiment 1]

As described above, the golf club body 1 of the present embodiment includes: the metal unprocessed tube 3 ; and the colored plating layer 5 which is a colored layer formed on the surface of the unprocessed tube 3 . The colored electroplating layer 5 has: a semi-gloss electroplating layer 7, which is laminated on the surface of the unprocessed tube 3; a first impact electroplating layer 9, which is laminated on the surface of the semi-gloss electroplating layer 7; a satin sensitive electroplating layer 11, whose layer Accumulated on the surface of the first strike plating layer 9; the second strike plating layer 13, which is laminated on the surface of the satin sensitive plating layer 11; and the decorative plating layer 15, which is laminated on the surface of the second strike plating layer 13, and It has a color corresponding to the color of the colored electroplating layer 5 .

Therefore, in this embodiment, the adhesion of the first strike plating layer 9 and the second strike plating layer 13 is improved, and the first and second strike plating layers 9 and 13 are connected to each other. Improve the tolerance of the colored electroplating layer 5 . Thereby, peeling resistance of the colored layer that can withstand bending of the golf club body 1 and the like can be ensured.

In addition, in the colored plating layer 5, the adhesion to the raw pipe 3 via the semi-gloss plating layer 7 can be improved, and the peeling resistance of the colored layer as a whole to the raw pipe 3 can be ensured and reliably obtained. Matte color. Moreover, in this embodiment, the layer structure of the colored electroplating layer 5 can be used to make a matte color, especially a matte black color, so that high scratch resistance can be obtained at the same time as matte black. In addition, the same effect can be obtained also in the case where the colored plating layer 5 is matte silver or matte gray.

Furthermore, the second plating strike layer 13 is the same as the first plating strike layer 9 . Therefore, the adhesion environment for the semi-gloss electroplating layer 7 and the decorative electroplating layer 15 of the satin-finish electroplating layer 11 can be made the same, and the adhesion between the satin-finish electroplating layer 11 and the semi-gloss electroplating layer 7 and the decorative electroplating layer 15 can be suppressed respectively. The interface is broken.

The unprocessed pipe 3 is made of steel, the semi-gloss electroplating layer 7, the first impact electroplating layer 9, the satin sensitive electroplating layer 11 and the second impact electroplating layer 13 are composed of nickel electroplating coatings, and the decorative electroplating layer is composed of trivalent chromium Composed of electroplated coatings.

Therefore, the peeling resistance to the unprocessed tube 3 as a whole of the colored layer can be more reliably obtained.

In the golf club shaft 1, the colored plating layer 5 has the chromate treatment layer 17 laminated on the surface of the decorative plating layer 15, so that the corrosion resistance can be improved.

The manufacturing method of the golf club shaft 1 is to laminate the semi-gloss electroplating layer 7 on the surface of the unprocessed tube 3 in the first production line, and to laminate the aforementioned first impact electroplating layer 9 on the surface of the semi-gloss electroplating layer 7 , in the second production line, lamination of a satin electroplating layer 11 on the surface of the first impact plating layer 9, and lamination of a second impact plating layer 13 on the surface of the satin electroplating layer 11, and in the third production line , the decorative plating layer 15 is laminated on the surface of the second strike plating layer 13 .

Therefore, it is possible to reliably manufacture the golf club body 1 whose colored layer has peeling resistance that can withstand bending and the like.

Example 2

7 is a schematic cross-sectional view showing the layer structure of the colored plating layer of the golf club body according to Example 2 of the present invention. In addition, in Example 2, the same code|symbol is attached|subjected to the same structure as Example 1, and description is abbreviate|omitted.

The golf club body 1 of this embodiment is provided with a sealing plating layer 19 instead of the chromate treatment layer 17 . Other constitutions are the same as in Embodiment 1.

The sealing electroplating layer 19 is disposed between the second strike electroplating layer 13 and the decoration electroplating layer 15 . That is, the sealing plating layer 19 is laminated on the surface of the second strike plating layer 13 , and the decorative plating layer 15 is laminated on the surface of the sealing plating layer 19 . Therefore, in the present embodiment, the decorative plating layer 15 is formed to be laminated on the outside of the second strike plating layer 13 with the sealing plating layer 19 interposed therebetween.

The sealing electroplating layer 19 can be one that adds sealing to relatively hard metals such as nickel, or relatively soft metals such as indium, gold, and silver. The material of the sealing plating layer 19 in this embodiment is composed of a sealing nickel plating film of nickel as an additional sealing property.

The sealing plating layer 19 is formed by performing sealing nickel plating on the raw pipe 3 formed up to the second strike plating layer 13 . Sealed nickel plating can be carried out by using a known method, for example, by nickel plating using a sealed plating bath in which nickel sulfate, nickel chloride, and boric acid are the main components. Additives.

The nickel sulfate is 180±40g/L, the nickel chloride is 25±8g/L, and the boric acid is 25±8g/L as an example of the sealed electroplating bath. Examples of the additives used here include improved ACNAB-1, improved ACNAB-2, sealed nickel HCR-K-4, sealed nickel SMPC-4, etc. manufactured by Okuno Pharmaceutical Co., Ltd.

Also in the above-mentioned Example 2, the same effect as that of the Example 1 can be exhibited.

3: Raw tube

5: Colored electroplating layer

7: Semi-gloss electroplating layer

9: The first impact plating layer

11: Satin sense electroplating layer

13: The second impact plating layer

15: Decorative electroplating layer

17: Chromate treatment layer

Claims (8)

A golf club shaft comprising: a metal raw tube; and a colored plating layer formed on the surface of the raw tube; the colored plating layer includes: a semi-gloss plating layer laminated On the surface of the aforementioned unprocessed tube; the first impact plating layer, which is laminated on the surface of the aforementioned semi-bright electroplating layer; the satin sense electroplating layer, which is laminated on the surface of the aforementioned first impact plating layer; the second impact plating layer, It is laminated on the surface of the aforementioned satin-finish electroplating layer; and a decorative electroplating layer is laminated on the outside of the aforementioned second impact electroplating layer and has a color corresponding to the color of the aforementioned colored electroplating layer. The golf club shaft according to claim 1, wherein the unprocessed tube is made of steel; the semi-gloss plating layer, the first impact plating layer, the satin sensitive plating layer, and the second impact plating layer are made of nickel plating The above-mentioned decorative electroplating layer is composed of a trivalent chromium electroplating coating. The golf club body according to claim 1 or 2, wherein the decorative plating layer is laminated on the surface of the second impact plating layer; the colored plating layer includes: a chromate treatment layer laminated on the decorative plating layer Electroplated surface. The golf club body according to claim 1 or 2, wherein the colored plating layer includes: a sealing plating layer laminated on the surface of the second impact plating layer; the decorative plating layer is laminated on the sealing plating layer s surface. The golf club body according to claim 1 or 2, wherein the color of the colored electroplating layer is matte black. The golf club body according to claim 1 or 2, wherein the color of the colored electroplating layer is matte silver. The golf club body according to claim 1 or 2, wherein, The color of the aforementioned colored electroplating layer is matte gray. A method for manufacturing a golf club body, which is the method for manufacturing a golf club body according to any one of Claims 1 to 7, wherein in the first production line, the aforementioned semi-gloss is laminated on the surface of the aforementioned unprocessed tube electroplated layer, and the aforementioned first impact electroplating layer is laminated on the surface of the aforementioned semi-gloss electroplating layer; in the second production line, the aforementioned satin-sensitive electroplating layer is laminated on the surface of the aforementioned first impact electroplating layer, and the aforementioned satin-surface laminating the aforementioned second strike plating layer on the surface of the electrosensitive plating layer; and laminating the aforementioned decorative plating layer on the outer side of the aforementioned second strike plating layer in the third production line.

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