JP2967359B2 - Golf club head manufacturing method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a method for manufacturing a golf club head, and more particularly, to a wood golf clag head mainly composed of a synthetic resin material such as fiber reinforced plastic and an iron golf club. On the back of the heel side of the club head such as the club head,
The present invention relates to a method for manufacturing a golf club head having a groove-shaped opening that is continuous with a shaft fitting hole.

[Conventional technology]

Conventionally, a club head body 1 mainly composed of a synthetic resin material such as fiber reinforced plastic as shown in FIGS. 8 and 9
(This conventional example shows a wood golf club head.) In general, the shaft fitting hole 2 is formed when the club head is formed.

[Problems to be solved by the invention]

However, since the shaft fitting hole 2 is formed at the time of molding the club head, there is a problem that the structure of the head molding die becomes complicated, so that it becomes expensive and the handling and workability are extremely poor.

Further, the conventional method of forming the shaft fitting hole 2 using a shaft pin has a problem that the hole accuracy is unstable and the degree of freedom in designing a mold is small.

[Object of the invention]

The present invention has been devised in view of such a conventional problem. A shaft fitting hole can be formed without using a shaft pin, and a head molding die can be simplified, and productivity and productivity can be improved. It is an object of the present invention to provide a method for manufacturing a golf club head having significantly improved molding yield.

[Means for solving the problem]

In order to achieve the above object, the present invention provides, in a split head molding die, a die for molding the back side of the heel side of the club head body, a groove-shaped shaft fitting hole extending from the upper end of the hosel portion to the lower end of the sole portion. After the protrusion is formed integrally with the opening, and the shaft fitting hole and the opening are integrally formed using the mold, the shaft is inserted into the shaft fitting hole or before the shaft is inserted. Alternatively, the gist is that the opening is closed by a cover member and formed integrally later.

[Function of the invention]

The present invention is configured as described above, and of the split head molding dies, a groove-shaped shaft fitting hole extending from the upper end of the hosel portion to the lower end of the sole portion is formed in the die for molding the heel-side back surface of the club head body. After providing a convex portion for integrally molding the opening and the opening, and using the mold to integrally mold the shaft fitting hole and the opening, after inserting the shaft into the shaft fitting hole, or Before inserting the shaft, a cover member formed separately from the club head is attached to the groove-shaped opening and integrally formed, so that a shaft fitting hole can be formed without using a shaft pin, The head molding die can be simplified.

(Example of the invention)

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 is a front view of a wood golf club head main body 1 mainly composed of a synthetic resin material such as fiber-reinforced plastic embodying the present invention, FIG. 2 is a longitudinal sectional front view of FIG. And 4, a club shaft, and 5 a socket. The wood golf club head body 1 has a hosel portion 6 formed short, and a shaft fitting hole 7.
2, a groove-shaped opening 8 extending from the upper end 6a of the hosel portion to the sole portion 3 is formed in the back surface 1a on the heel side of the club head body 1 as shown in FIG.

 FIG. 5 is a perspective view showing this state.

In the embodiment of the present invention, as described above, the shaft fitting hole 7 is not formed in a hollow cylindrical shape as in the related art, but is a groove-shaped shaft fitting hole 7 opened on the heel side back surface 1a of the club head body 1. It is formed in.

By configuring the club head body 1 as described above,
The head molding die is greatly simplified, and the head molding die can be downsized.

The opening 8 communicating with the shaft fitting hole 7 is
As shown in FIG. 3, when inserting the club shaft 4 into the shaft fitting hole 7 or before inserting the club shaft 4, a cover member 9 made of the same material or a different material molded in another process is attached. The surface of the club head body 1 is finished to be integrally formed.

Next, a method of manufacturing the club head main body 1 will be described. When the club head main body 1 is molded using a split mold head molding die, the heel of the club head main body among the head molding dies (not shown) in advance. A protrusion for forming the groove-shaped shaft fitting hole 7 and the opening 8 is provided in a part of the mold for forming the side and back surfaces, and in this state, the club head body 1 is formed by a method similar to the conventional method. I do. This molding method may be either compression molding or injection molding.

The shape of the club head body 1 thus formed is shown in FIG. 5, and the club shaft 4 is assembled before the club shaft 4 is inserted as shown in FIG.
Alternatively, when the club shaft 4 is inserted into the shaft fitting hole 7, the cover member 9 of the same material or a different material molded in another process is attached via an adhesive or the like to finish the surface of the club head body 1. And are integrally molded.

In the above-described embodiment, the club head body 1 is integrally formed of a synthetic resin material such as fiber reinforced plastic as shown in FIG. 3, but it may be left hollow as shown in FIG. Alternatively, it is also possible to use a wood golf club body 1a having a core body 10 made of a lightweight member, and the opening 8 communicating with the groove-shaped shaft fitting hole 7 is made smaller than the diameter d of the shaft fitting hole 7. Is also possible.

Further, in the above-described embodiment, the wood golf club head body has been described. However, it is needless to say that the present invention can be applied to an iron golf club head mainly composed of a synthetic resin material such as fiber reinforced plastic.

〔The invention's effect〕

According to the present invention, a groove-shaped shaft fitting hole and an opening extending from the upper end of the hosel portion to the lower end of the sole portion are provided in the mold for molding the heel side back surface of the club head body among the divided molds for the head as described above. Provide a convex part that integrally molds the part,
After integrally molding the shaft fitting hole and the opening using this mold, a cover member molded separately from the club head is inserted into the shaft fitting hole when the shaft is inserted, or before and after the shaft is inserted. Since it is mounted on the groove-shaped opening and is integrally molded, the following excellent effects can be obtained.

(A). As in the past, the shaft fitting hole can be formed without using a shaft pin, so that the head forming die can be greatly simplified, and since the centering work of the shaft pin can be omitted, the forming work can be omitted. It can be performed efficiently.

(B). The molding of the club head is simplified, and the productivity and the molding yield are improved.

(C). In compression molding, it is easy to set the molding member into the molding die, and uniform molding is possible, so the quality variation between club heads is significantly reduced, and highly accurate products can be efficiently produced. .

(D). As a result of the simplification of the molding die, the size of the die itself can be reduced, the handling becomes easy, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a wood golf club head main body mainly made of a synthetic resin material such as fiber reinforced plastic embodying the present invention, FIG. 2 is a longitudinal sectional front view of FIG. 1, and FIG. FIG. 4 is a cross-sectional view showing another embodiment of a wood golf club head having a hollow or core body, with a shaft inserted into the shaft fitting hole of FIG.
FIG. 5 is a perspective view of a golf club head body embodying the present invention, FIG. 6 is a perspective view of a golf club head body showing a state where an opening communicating with a shaft fitting hole is closed by a cover member, and FIG. The drawings are perspective views showing another embodiment of the club head main body, and FIGS. 8 and 9 are a front view and a longitudinal sectional front view of a conventional wood golf club head. 1
...... Wood golf club head body, 1a ... heel side back surface, 3 ... sole part, 4 ... club shaft, 5 ... socket, 6 ... hosel part, 6a ... upper end of hosel part, 7 ... shaft fitting Mating hole, 8 ... opening, 9 ... cover member, 10 ... hollow or core.

Claims (1)

(57) [Claims] 1. A method of manufacturing a golf club head mainly comprising a synthetic resin material such as fiber reinforced plastic using a split mold head molding die, wherein the club head is formed of the split mold head molding die. A mold for molding the back side of the heel side of the main body is provided with a convex portion for integrally molding a grooved shaft fitting hole and an opening from the upper end of the hosel portion to the lower end of the sole portion, and using the mold. After the shaft fitting hole and the opening are integrally formed, the opening is closed with a cover member and integrally formed when the shaft is inserted into the shaft fitting hole, or before or after the shaft is inserted. Manufacturing method of a golf club head.