JPH1176476A - Golf iron club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance a covering effect and a leveling effect of a surface defect of a head base material, and to secure a uniform base film thickness without being influenced by a complicated surface morphology of each part of the head, thereby improving decorativeness. And to improve corrosion resistance. SOLUTION: A surface 10a of a head substrate 10 on which a head main body 1 is formed by soft iron forging is coated with a base Ni plating layer 11. A first electrolytic Ni plating layer 11A that covers the surface 10a of the head substrate 10 by electrolytic Ni plating,
It has a double layer structure with the second electroless Ni plating layer 11B in which the surface of the plating layer 11A is coated by electroless Ni plating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf iron club head obtained by subjecting a soft iron forged head body to a surface treatment, and more particularly to a formation of a Ni plating layer for an underlayer coated on the surface of the head body. In addition to improving the covering and leveling effects of surface defects on the head substrate, the uniform base film thickness is ensured without being affected by the surface morphology of each part of the head, and the decorativeness and corrosion resistance are improved. It is intended to be.

[0002]

2. Description of the Related Art Conventionally, in this type of golf iron club head, as shown in FIGS. 2 and 3, a head body 1 made of soft iron forging is integrally formed with a hitting portion 2 and a hosel portion 3, and There is one having a cavity type structure in which a concave portion 4 is formed on the back surface 2b side corresponding to the face surface 2a of the hitting portion 2.

[0003] The head body 1 having such a cavity-type structure has improved hitting characteristics such as lowering the center of gravity, expanding the sweet area by adjusting the depth of the center of gravity, and increasing the moment of inertia by distributing the peripheral weight. In order to achieve this, the angle θ formed between the corresponding surface (cavity surface) 4a on the face surface 2a side of the concave portion 4 formed on the back surface 2b side and the corresponding surface (undercut surface) 4b on the sole surface 2c side is made an acute angle. ,
It has an overhang (undercut) shape.

Conventionally, as shown in FIG. 4, in a surface treatment step in the manufacturing stage of the head body 1, the surface 10a of the head body 10 formed by soft iron forging has surface defects such as uneven portions and pinholes. Usually, the head base 1
A Ni plating layer 11 as a base on the surface 10a
After coating with a film thickness T of about 20 to 30 μm by i-plating, the surface 11 a of the base Ni plating layer 11 is coated with a decorative plating layer 12 such as Cr plating or NiB plating. ing.

In the Ni plating process, electrolytic Ni is used.
There are plating process and electroless Ni plating process.
Since the covering action and the leveling action are high, there is an advantage that the surface 10a of the head substrate 10, which has many surface defects such as irregularities and pinholes, can be smoothed and formed into a mirror surface that gives gloss. On the other hand, there is a disadvantage that the Ni plating layer 11 is difficult to electrodeposit at a portion that is a shadow portion with respect to the electrode, such as an overhang (undercut) shape portion of the head main body 1, or at a portion away from the electrode.

On the other hand, the latter electroless Ni plating process has an advantage that, even if the plating solution flows even in a complicated head shape, the plating film thickness can be almost uniformly secured in each part of the head. Since a leveling effect such as electrolytic Ni plating cannot be expected, not only is the surface morphology of the head substrate 10 easily affected, but also the cost of the solution is high, and it takes a long time to form a coating with a plating film thickness. .

[0007]

However, in the above-mentioned conventional iron club head for golf having a cavity type structure, the head substrate 1 is formed by electrolytic Ni plating.
In the case where the undercoating Ni plating layer 11 is coated on the surface 10a of the
Has an overhang (undercut) shape, and the Ni plating layer 11 is difficult to electrodeposit on a portion corresponding to the shaded portion, so that a predetermined Ni plating film thickness cannot be secured.

Further, if the plating process is performed for a long time in order to secure the Ni plating film thickness at a portion corresponding to the shaded portion of the head main body 1 to a predetermined value, other parts of the head main body 1 are not subjected to plating. A portion, for example, a portion corresponding to the hosel portion 3, has an excessively large Ni plating film thickness, so that plating cracks are likely to occur, and decorativeness and corrosion resistance are reduced.

Further, when the surface 10a of the head substrate 10 is coated with the base Ni plating layer 11 by electroless Ni plating, surface defects such as irregularities and pinholes on the surface 10a of the head substrate 10 may be reduced. Easily exposed on the surface of

SUMMARY OF THE INVENTION It is an object of the present invention to enhance a covering effect and a leveling effect of a surface defect of a head substrate and to secure a uniform underlayer thickness without being influenced by a complicated surface configuration of each part of the head, thereby improving decorativeness. Another object of the present invention is to provide a golf iron club head capable of improving corrosion resistance.

[0011]

In order to solve the above-mentioned problems, the present invention provides a decorative plating layer on a surface of a head substrate on which a head body is formed by soft iron forging via a base Ni plating layer. In a golf iron club head having been subjected to a surface treatment, the base Ni plating layer includes a first electrolytic Ni plating layer covering the surface of the head substrate by electrolytic Ni plating, and a first electrolytic Ni plating layer. It has a double layer structure with a second electroless Ni plating layer in which the surface of the Ni plating layer is coated by an electroless Ni plating process.

In this case, it is preferable that the plating thickness of the first electrolytic Ni plating layer in the base Ni plating layer is larger than that of the second electroless Ni plating layer.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawing shown in FIG. In the illustrated embodiment according to the present invention, portions having the same configuration as the conventional golf iron club head shown in FIGS. 2 to 4 will be described using the same reference numerals.

In the head body 1 according to the present invention, a Ni plating layer 11 for a base is formed on a surface 10a of a head base 10 formed by soft iron forging in a surface treatment step in a manufacturing stage.
When the surface treatment is performed on the decorative plating layer 12 through the substrate, as shown in FIG.
A first electrolytic Ni plating layer 11A that covers the surface 10a of the head substrate 10 by electrolytic Ni plating;
The surface of the first electrolytic Ni plating layer 11A is coated with electroless Ni.
Second electroless Ni plating layer 1 covered by plating
1B.

In this case, the first electrolytic Ni plating layer 11A for forming the plating film thickness T of the base Ni plating layer 11 is formed.
Is 5 to 20 μm, and the thickness of the second electroless Ni
The plating thickness t2 of the plating layer 11B is set in the range of 5 to 10 μm, and the plating thickness t1 of the first electrolytic Ni plating layer 11A is changed to the second electroless Ni plating layer 1A.
1B, the thickness is larger than the plating thickness t2 (t1> t2), whereby surface defects such as uneven portions and pinholes on the surface 10a of the head substrate 10 are absorbed, and smoothness is improved. .

In a specific embodiment in which the surface 10a of the head substrate 10 is coated with the base Ni plating layer 11, it corresponds to the face surface 2a and the sole surface 2c of the hitting portion 2 of the head body 1. The plating thickness T of the portion is 30 to 40 μm in consideration of wear and the like, and the back surface 2b
The plating film thickness T of the portion corresponding to the cavity surface 4a and the undercut surface 4b in the concave portion 4 on the side is at least 10 μm.
Is necessary, first, a portion corresponding to the face surface 2a and the sole surface 2c is reduced to 30 μm by electrolytic Ni plating.
m, and a concave portion 4 on the back surface 2b side.
Is coated with a plating film thickness t1 of 2 to 5 μm in the area corresponding to the cavity surface 4a and the undercut surface 4b, and the surface 10a of the head substrate 10 is smoothed by covering the surface defects thereof to give gloss. Make it a mirror surface.

Next, portions of the head body 1 corresponding to the respective surfaces 2a, 2c, 4a, 4b are made of electroless Ni.
It is possible to improve decorativeness and corrosion resistance by coating stepwise to a plating film thickness t2 of 5 to 7 μm by plating treatment and securing a predetermined plating film thickness T of the base Ni plating layer 11. Thus, the mutual advantages of the electrolytic Ni plating process and the electroless Ni plating process are utilized.

[0018]

As is apparent from the above description, according to the present invention, a Ni plating layer for a base, which is coated on the surface of a head substrate forming a head body by soft iron forging, is formed by electrolytic Ni plating on the surface of the head substrate. First electrolysis N coated by processing
Since it has a double-layer structure of an i-plated layer and a second electroless Ni-plated layer in which the surface of the first electrolytic Ni-plated layer is coated by electroless Ni-plated, The mutual advantages of the electroless Ni plating process can be utilized, whereby the action of covering and leveling the surface defects of the head base can be enhanced, and the surface morphology of each part of the complicated head can be improved. A uniform underlayer thickness can be ensured, and the decorativeness and corrosion resistance can be improved.

Further, by making the thickness of the first electrolytic Ni plating layer in the base Ni plating layer larger than that of the second electroless Ni plating layer, surface defects such as irregularities and pinholes on the surface of the head substrate can be achieved. Can be absorbed and smoothness can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a state of a surface treatment on a head base showing one embodiment of a golf iron club head according to the present invention.

FIG. 2 is an explanatory view of a conventional golf iron club head.

FIG. 3 is a cross-sectional view of a conventional golf iron club head.

FIG. 4 is an explanatory diagram showing a surface treatment state of a conventional head substrate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Head main body, 2 ... Hitting part, 2a ... Face surface, 2b ... Back surface, 2c ... Sole surface, 3 ... Hosel part, 4 ... Depression, 4b. ..Undercut surface, 10: Head substrate, 10a: Surface, 11: Ni plating layer for base, 11A: First electrolytic Ni plating layer, 11B: Second electroless Ni plating layer, 12: plating layer for decoration.

Claims (2)

[Claims] An iron club head for golf, wherein a surface of a head substrate on which a head body is formed by soft iron forging is subjected to a surface treatment with an ornamental plating layer via an underlying Ni plating layer; The plating layer includes a first electrolytic Ni plating layer that covers the surface of the head substrate by electrolytic Ni plating, and an electroless Ni plating layer that covers the surface of the first electrolytic Ni plating layer.
An iron club head for golf, comprising a double layer structure with a second electroless Ni plating layer coated by plating. 2. A first electrolytic N in a base Ni plating layer.
2. The golf club head according to claim 1, wherein the thickness of the i-plated layer is larger than that of the second electroless Ni-plated layer.