JPH06305241A - Method for marking of golf club and golf club - Google Patents

Abstract

PURPOSE:To form a marked part which is beautiful and excellent in durability on a club head by a method wherein a surface of the golf club head is irradiated with laser beams to apply a mark consisting of a required color tone varied part to the irradiated part. CONSTITUTION:Laser beams 2 transmitted from a laser transmitter 1 are conducted to an ftheta lense 10 arranged above a marked position of a club head 7 via a (y) axis rotary reflecting mirror 8 and an (x) axis rotary reflecting mirror 9. Then, the laser beams 2 are converged in a pinpoint form on a surface of a club head 7. Thereafter, the (y) axis rotary reflecting mirror 8 and the (x) axis rotary reflecting mirror 9 are continuously rotated with a (y) axis rotary reflecting mirror-rotating device 11 and an (x) axis rotary reflecting mirror-rotating device 12, and besides both devices 11, 12 are controlled with a computer or the like. Thereby an (x-y) surface on the club head 7 is scanned with the laser beams 2 converged in the pinpoint form so that a required marked part can be drawn thereon, and a color tone can be varied in a required marked part form.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club which is capable of forming a highly durable display portion (mark) on a club head of a golf club cleanly without causing defects such as crushing, chipping, bleeding, distortion, and blurring. And a golf club that has been subjected to a marking treatment by the method.

[0002]

2. Description of the Related Art Conventionally, a club head of a golf club has been marked with a personal name signature, various marks, a design pattern, etc. on its surface. ) There are a method of marking with a marking machine, (2) a method of forming a display portion by a press die, and (3) a method of forming a pattern from the bottom of a plate, pasting the pattern on the club head surface, and sandblasting.

[0003]

However, in these marking methods, a fine display portion such as characters or a part of the mark is crushed, chipped, smeared, blurred, or distorted to form a clear display portion. In some cases, it may not be possible, and in some cases, the mark may become faint or disappear with use, resulting in poor durability. Therefore, it is desired to develop a new marking method that solves these drawbacks and replaces the conventional marking method.

The present invention has been made in view of the above circumstances, and forms a clear and durable display portion without causing defects such as crushing, chipping, bleeding, distortion, and blurring in the club head of a golf club. It is an object of the present invention to provide a golf club marking method capable of performing the marking and a golf club having a clean and excellent display portion formed on the club head by performing the marking by the method.

[0005]

Means for Solving the Problems The present inventor has conducted various studies in order to achieve the above object, and as a result, when the club head surface of a golf club is irradiated with laser light, the base surface of the club head or The coating layer, the finishing layer such as the plating layer undergoes a physical or chemical change to change its color tone, and the changed color tone exhibits a stable color tone for a long period of time. It was found that it is possible to form a beautiful display section without causing problems such as bleeding, distortion, and blurring, and it is possible to clearly reproduce even very fine parts such as letters by using a very thin laser beam, The present invention has been completed.

Therefore, according to the present invention, the club head surface of a golf club is irradiated with laser light to change the color tone of the laser light irradiation portion of the club head surface portion, and the desired change is displayed on the club head surface by the color tone change portion. Provided is a method for marking a golf club, which comprises forming a portion, and a golf club characterized in that the club head is marked by the method.

The present invention will be described in more detail below.
As described above, the marking method of the golf club of the present invention irradiates the surface of the club head with laser light to change the color tone of the portion of the club head surface irradiated with laser light. The type of laser light is not particularly limited and various selections are made according to the type of material constituting the surface layer of the club head. Particularly, laser light having a wavelength of about 1 μm or 1 μm or less such as an excimer laser or a YAG laser. Is preferably used.

Further, as a golf club which can be marked by the method of the present invention, a metal head having a plated surface is preferably used. Specifically, a head base is plated with nickel, Furthermore, the thing etc. which gave chromium plating on it are mentioned. Also,
Other materials may be used as long as the surface of the club head is made of a material that changes the color tone by laser light. In this case, depending on the material of the club head and the type of finishing treatment, even if the laser light irradiation is performed before the finishing treatment such as the plating treatment, the laser light irradiation may be performed after the finishing treatment, that is, on the finished surface such as the plating film. Further, when the finishing treatment comprises a plurality of steps, laser light irradiation may be performed between the steps. Further, since the display portion by the marking method of the present invention is excellent in durability and it is not essential to protect the display portion by coating or the like, coating or the like can be omitted, and laser light irradiation is further performed on the plating film. In that case, an oxide film is formed, and the effect of improving rust prevention performance is also obtained.

Further, in the marking method of the present invention, the color tone can be changed by variously selecting the type and wavelength of the laser beam, the irradiation time, the number of shots, etc. according to the material of the club head, the type of finishing treatment, etc. The shade obtained can be varied, which makes it possible to adjust the shade of the mark. The normal irradiation speed is preferably 300 mm / sec or less, and the number of shots is 1 to 50,000 (repeated from 0.1 to 50 KHz; in this case, particularly 1 to 50 KHz for YAG laser)
Is preferable). The total energy is preferably 1 to 50 W.

In the marking method of the present invention, the display portion is formed by the color tone change portion generated on the club head surface by the irradiation of the above laser beam. In this case, a specific method for forming the display portion is as follows. Examples include a method of scanning a pinpoint-focused laser beam on the club head surface to draw a desired display portion on the club head surface.

This method will be described in more detail.
For example, as shown in FIG. 1, a laser beam 2 oscillated from a laser oscillator 1 is passed through a y-axis rotary reflecting mirror 8 and an x-axis rotary reflecting mirror 9, and an fθ lens 10 is disposed above the marking position of the club head 7. The lens 10 focuses the laser beam 2 on the surface of the club head 7 in a pinpoint manner. Then, the y-axis rotary reflecting mirror rotating device 11 and the x-axis rotary reflecting mirror rotating device 12 continuously rotate the y-axis rotary reflecting mirror 8 and the x-axis rotary reflecting mirror 9, respectively, and both devices 11 and 12 are connected to a computer or the like. The laser beam 2 focused in a pinpoint manner is scanned so as to draw a desired display section on the xy plane on the club head 7 by controlling the color tone on the surface of the club head 7 in a desired display section shape. It changes.

[0012]

EXAMPLES The present invention will now be specifically described with reference to examples, but the present invention is not limited to the following examples. The surface of the metal club head, which had been subjected to nickel plating treatment and chromium plating treatment in this order, was irradiated with laser light using the apparatus shown in FIG. 1 to perform marking treatment on the club head surface. The processing conditions are as follows.

Laser light Nd: YAG laser, wavelength 1.064 μm, total energy 1 to 50 W, number of shots 10 to 50,000 times (1 to 50 KHz (optimum 35 KH
z) Repeat) Laser light irradiation speed ~ 300 mm / sec (optimum 50 mm / sec)

On the obtained club head, clean marks having no crushing, chipping, blurring, bleeding, or distortion were formed. Further, when a neutral salt spray test was conducted on the obtained mark, it was confirmed that the mark did not change at all and had good durability.

[0015]

According to the marking method of the present invention, a highly durable display portion can be formed neatly on the surface of the club head without causing defects such as crushing, chipping, bleeding, distortion, and blurring. Therefore, the golf club subjected to the marking treatment by the marking method of the present invention has a beautiful display portion having excellent durability.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of an apparatus for carrying out the marking method of the present invention.

[Explanation of symbols]

 2 Laser beam 7 Golf club head

Claims (2)

[Claims] 1. A club head surface of a golf club is irradiated with laser light to change the color tone of a portion of the club head surface where the laser light is irradiated, and a desired display portion is formed on the club head surface by the color tone change portion. A method for marking a golf club, comprising: 2. A golf club, wherein the club head is marked by the method according to claim 1.