JP2896023B2 - Golf club head manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a golf club head, and more particularly, to a method of forming a face surface of a composite material of a preformed body and a metal, having a good inner casting surface, and reducing the wall thickness. The present invention relates to a method of manufacturing a golf club head capable of securing strength and elasticity of a face surface and reducing weight by performing the method.

[0002]

2. Description of the Related Art Hitherto, a high-pressure solidification method (squeeze casting method) has been used as a method for producing a metal matrix composite. In this method, a preformed body made of a reinforcing material such as a ceramic whisker is placed in advance in a cavity of a casting mold, and then a molten base metal is press-fitted, impregnated into the preformed body, and cast. Things. The metal matrix composite obtained by this method has mechanical properties such as high strength and excellent abrasion resistance.

[0003] With respect to the high-pressure casting method for producing a metal matrix composite, JP-A-3-146252, JP-A-3-146253, and JP-A-3-4622.
Prior art is disclosed at 54 mag. JP 3-146252,
Japanese Patent Application Laid-Open No. 3-14 discloses that the press-fitting speed is adjusted in order to prevent deformation and destruction of the preform when press-fitting molten metal.
No. 6253 discloses a method of arranging a preformed body to prevent the occurrence of a cavity, and Japanese Patent Application Laid-Open No. 3-146254 discloses a method of manufacturing a thin-walled composite material such as a plate and a cylinder. I have.

[0004]

However, these prior arts do not provide a specific method for manufacturing a golf club head aimed at by the present application. That is, the above prior art relates to a method of manufacturing an article having a general shape, and a special shape (a shape having a hollow thin wall and having almost no opening portion) such as a golf club head, by any method. It does not disclose whether to cast it. In casting such a shape, generally, a disintegrating core such as sand is used for casting.

However, when a collapsible core is used, the casting surface on the inner surface of the club is poor, and the thickness accuracy of the product is poor. When a metal core is used, the problem of the casting surface on the inner surface of the club can be solved, but it is difficult to reduce the thickness of the corners (notches) inside the club head.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a method of manufacturing a golf club head having a good inner casting surface and capable of reducing the weight by reducing the thickness.

[0007]

According to the first aspect of the present invention,
The casting mold is divided into a first mold on the face side and a second mold on the rear side, and a preform made of whiskers for a reinforcing material is provided on the face portion in the first mold. The movable metal core is placed in the first mold and the second mold, and the molten metal is placed between the first mold and the second mold and the core. Are separately cast under high pressure, the molten metal is impregnated in the whiskers, and after the molten metal has solidified, the core is moved out of the mold and taken out, and the face side head portion and the rear side head are removed. The whisker is used to cast the part and thus cast
The face-side head portion and the rear-side head portion reinforced by welding are integrally joined to each other by welding.

Next, an embodiment of a method of manufacturing a golf club head according to the present invention will be described with reference to the drawings.

FIG. 1 is a schematic front view showing a cast state of a face-side head portion according to an embodiment of a method of manufacturing a golf club head according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. 3 is a schematic front view showing a casting state of a rear head portion according to an embodiment of the golf club head manufacturing method of the present invention, FIG. 4 is a sectional view taken along line BB of FIG. 3, FIG.
FIG. 6 is a plan view of a head manufactured by one embodiment of a golf club head manufacturing method of the present invention. FIG. 6 is a bottom view of a head manufactured by one embodiment of a golf club head manufacturing method of the present invention. FIG. 7 and FIG.
FIG. 4 is a sectional view taken along line C of FIG.

The method of manufacturing a golf club head according to the present invention is characterized in that the head is divided into a face-side head portion and a rear-side head portion, and a movable metal core is used. It is.

As shown in FIGS. 1 and 2, the face side head portion 1 is cast as follows. That is, a preform 3 made of a reinforcing material such as a ceramic whisker is placed on a face portion in the first mold 2 for the face side head portion 1 in advance, and is slidable vertically in the first mold 2. Insert the metal core 4 for the face side head part,
A molten metal such as aluminum, an aluminum alloy, magnesium or a magnesium alloy is cast between the mold 2 and the core 4 from the gate stamp 5 under high pressure, and after the molten metal is solidified, the core 4 is placed in the first mold. Then, the face-side head portion 1 is cast out from the inside 2 and cast.

On the other hand, as shown in FIGS. 3 and 4, the rear head portion 6 is cast as follows. That is,
The metal core 8 for the rear side head portion, which is slidable in the vertical direction, is placed in the second metal mold 7 for the rear side head portion, and the face side head portion 1 and the metal core 8 are inserted between the second die 7 and the core 8. After the molten metal of the same material is cast from the sprue stamp 9 under high pressure and the molten metal solidifies, the core 8 is pulled out from the inside of the second mold 7 to cast the rear head portion 6.

Thus, the face-side head portion 1
After the rear head portion 6 is cast, as shown in FIGS. 5 and 6, the face side head portion 1 and the rear head portion 6 are integrally joined to each other by TIG welding, laser welding, or the like. As a result, the metal hollow golf club head of the present invention is manufactured.

[0014]

As described above, according to the present invention, a smooth casting surface can be obtained by using a movable metal core, and a high wall thickness dimensional accuracy can be obtained. This provides a useful effect that it can be achieved.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing a cast state of a face-side head portion according to an embodiment of a golf club head manufacturing method of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a schematic front view showing a casting state of a rear head portion according to an embodiment of the method of manufacturing a golf club head of the present invention.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a plan view of a head manufactured by an embodiment of the method for manufacturing a golf club head according to the present invention.

FIG. 6 is a bottom view of the head manufactured by one embodiment of the golf club head manufacturing method according to the present invention.

FIG. 7 is a sectional view taken along line CC of FIG. 5;

[Explanation of Signs] 1: Face-side head portion, 2: First mold, 3: Preformed body, 4: Core, 5: Gate stamp, 6: Rear-side head portion, 7: Second mold, 8 : Core, 9: Hot stamp.

──────────────────────────────────────────────────続 き Continued on the front page (72) Yoshimichi Hino, Inventor 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside Nippon Kokan Co., Ltd. (72) Masao Nagai 3-6-29, Washisu, Fukushima-ku, Osaka-shi Miz (72) Inventor Masakatsu Shirai 64, Aku, Mishima-shi, Shizuoka Pref. Tosei Co., Ltd. JP-A-60-102260 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B22D 17/00 B22D 17/22 A63B 53/04 B22C 9/10

Claims (1)

(57) [Claims] 1. A casting mold is divided into a first mold on the face side and a second mold on the rear side, and a whisker for reinforcing material is provided on a face portion in the first mold. And a movable metal core is placed in each of the first mold and the second mold, and the first mold, the second mold, the core, The molten metal is separately cast under high pressure, and the molten metal is impregnated into the whiskers.
So, after the molten metal has solidified, taken out by moving the core from within the mold, casting a face-side head portion and a rear-side head portion, thus cast, the U
A method of manufacturing a golf club head, wherein the face-side head portion and the rear-side head portion reinforced by whiskers are integrally joined to each other by welding. "