JPS5975068A - Production of golf wood club head - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to fiber reinforced plastic (hereinafter referred to as 1=RI)
Regarding the manufacturing method of a golf wood club head with an outer shell such as (abbreviated as ), by devising the molding of the FRP outer shell that makes up the head body and the means for attaching the mass body,
This facilitates the adjustment of the molded head 11.

Conventionally, in this type of wood club head, as disclosed in Japanese Patent Publication No. 51-21436, the outer shell of the wooden head body is made of FRP, and the core is filled with foamed synthetic resin. There is something that affects the structure.

However, as is well known, with such conventional types, there are various difficulties in the specific molding method due to the unique and complex shape of the outer periphery of the head. In order to increase the weight, various methods are used for arranging and fixing mass bodies such as sole weight members and back weight members made of bending materials such as brass in the sole and back parts, as well as means for easily increasing and decreasing their weight. There was an inconvenience.

The purpose of this invention is to improve the means for fixing the mass body in the conventional manufacturing means described above.
The illustrated embodiment will now be described.

FIGS. 1 and 2 show a first embodiment of the present invention, and numeral 1 in the figures is a head body of a wood club obtained by a manufacturing process described later. The head body 1 is made of FRP
It is formed of an outer shell 2 and a core material 3 made of foamed synthetic resin, and a weight member 4 is embedded and fixed at a predetermined position on the sole portion 1a side. The weight member 4 is formed into a hat-shaped cross section by a mass body 5 made of metal such as lead, and a peripheral material 6 made of synthetic resin, preferably FRP, surrounding the circumferential surface of the mass rest 5. On one end surface thereof, a locking flange portion 4a that is combined with the FRP outer shell 2a on the sole portion side of the main head rest 1 is formed to protrude. Also,
7 and 8 in the figure are hardened FRPs embedded in the FRP outer shells 2b and 2C of the face portion 1b and back portion 1c of the main head rest 1, respectively, as necessary. A face plate made of RP and a back weight member made of metal material such as brass,
Furthermore, in the figure, 9 is a club shaft 71 to 71 that is inserted and fixed to the neck portion 1d of the head body 1, and 10 is a cap-shaped protection that protects the periphery of the attachment base between the club shaft 9 and the neck portion 1d of the head body. At the time of head molding, these members are temporarily held in a predetermined position along with the attachment of an FRP molding material to the core material, which will be described later, and are temporarily suspended at the same time as molding.

That is, in order to manufacture the above-mentioned club head according to the present invention, as shown in FIGS. 3 and 4, prepreg or liquid hardened When wrapping and attaching the FRP molding material 12 in which reinforcing fibers are impregnated with synthetic resin, a fitting hole 11a is formed in the appropriate position corresponding to the sole portion of the core material 11.
After the weight member 4 is embedded in the fitting hole 11a in advance and locked so that the locking flange 4a is exposed from the core material 11, the FRP molding material 12 is wound. The weight member 4 is temporarily held by coating (see FIG. 3), and then such head molding materials 4, 11, and 12 are placed in the mold 13 and the mold is clamped (see FIG. 4). By hot pressing, a club head as shown in FIGS. 1 and 2 is obtained.

FIG. 5 shows a second embodiment of the present invention, in which the arrangement of the weight member 4 in the first embodiment is improved, and the locking flange 4a of the weight member 4 is used for FRP molding. It is constructed so as to be held between materials 12.

The weight of the weight member used in the present invention is preferably finely adjusted by cutting and removing the weight member surrounded by a peripheral material made of F'RP from the outside with a drill or the like. In this case, it is suitable to fill the cutting space with a filler such as a resin-impregnated sponge that does not substantially affect the weight. Furthermore, as a weight member,
Although an example in which the mass body is completely surrounded by a peripheral material such as FRP is shown, as another example, as shown in FIG.
One end surface of the mass body 5 may be exposed on the side end surface flush with the outer circumferential material 6 such as FRP, and the locking flange may not be around the entire circumference of the weight member but may be partially formed.

Furthermore, if wax, salt, or other eluable or solvent-meltable materials are used as the core material instead of the foamed synthetic resin material, the weight part remains in the head and the other parts are formed hollow. It is possible for children to do so.

As explained above, in molding a club head having an FRP outer shell structure, the present invention embeds a weight member consisting of a mass body surrounded by an outer circumferential moon such as a core material FRP, and - By forming a locking flange made of a part of the outer peripheral material such as FRP on the bolt surface and holding the locking flange with FRP molding material, the weight member can be made from FR.
Since it is integrated with the P outer shell, the fixation of the way 1 member is firm, and there is no wobbling even when the ball is hit, and the weight of the weight member can be adjusted by cutting the suspension body. , the balance of the head can be easily adjusted, and the degree of freedom in setting h1 is increased by expanding the adjustment range, etc.
It exhibits excellent curing properties for practical use.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of a wood club head for golf according to the present invention, FIG. 2 is a sectional view of the main part, and FIGS. 3 and 4 are explanations showing the manufacturing process according to the invention. FIG. 5 is an explanatory diagram showing a second embodiment of the present invention, and FIG. 6 is a sectional view showing another example of the weight part shrine used in the manufacturing means according to the present invention. DESCRIPTION OF SYMBOLS 11... Core material, 11a... Fitting hole, 4... Weight member, 5... Mass body, 6... Peripheral material, 12... FR. P molding material, 13... mold.

Claims (1)

[Claims] A weight member formed by surroundingly molding an outer circumferential material around a mass body before inserting a head molding material with an FRP molding material added around a core material into a mold and hot-pressing it. is fitted into a fitting hole formed at a predetermined position of the core material, and a locking flange is formed on the exposed end surface side of the weight member to integrate it with the FRP molding material. Manufacturing method for wood club heads for Zuru golf.