JPH0113388B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to fiber reinforced plastics (hereinafter referred to as
Regarding the manufacturing method of the head of a wood golf club with an outer shell made of (abbreviated as FRP), the moldability and workability are improved by devising a method for forming the FRP outer shell that forms the head body. It is.

Generally, this type of wood club has a head body made of wood such as persimmon or maple that is processed into the desired shape, and a face plate made of ABS resin or the like on the hitting surface and a mass body made of brass or the like on the sole surface. It is well known that the inertia is increased by this, and the flight distance is increased.

However, such conventional wood club heads have become expensive due to the soaring cost of materials due to the difficulty in obtaining raw wood, and the sophistication of processing technology due to the complexity of the shape. A decline was inevitable.

Therefore, in view of the drawbacks of the so-called wooden club heads mentioned above, as disclosed in Japanese Patent Publication No. 51-21436, an FRP outer shell structure in which the core of the head body is filled with foamed synthetic resin has been developed. A wood-type club head has been developed, but as is well known, there are various difficulties in its specific manufacture due to the complexity of the head shape, and at present it has not been put into practical use.

The present invention aims to embody and put into practical use the manufacturing means of the prior art described above, and will be described below based on the illustrated embodiments.

1 to 6 show a first embodiment of the means for manufacturing a wood-type club head for golf according to the present invention, and as shown in FIGS. 1 and 2, 1 in the figures is the head body. be. The head body 1 is
It is formed from an FRP outer shell layer 2 and a core material 3 made of wood or foamed synthetic resin, etc., and a club shaft 4 is inserted and fixed into the base 1a, and the striking surface 1b is made of ABS resin or the like. On the face plate 5 and the sole surface 1c, a sole plate 6 made of a metal plate such as brass, and on the back surface 1d, a mass body 7 made of a metal material such as brass are arranged and fixed by manufacturing means described later. In addition, 8 in the figure is a plug that closes the opening on the insertion end side of the club shaft 4 which is inserted and fixed to the base 1a of the head main body 1;
Further, reference numeral 9 in the figure is a protector for protecting the attachment portion between the head main body base 1a and the club shaft 4.

That is, in order to manufacture the above-mentioned wood-type club head, as shown in FIGS. 3 to 6, a rod-shaped jig 10 corresponding to the club shaft shaft (in the illustrated embodiment, the club shaft itself has a rod-shaped jig 10) is used. In this case, the protector 9 is inserted and fixed in advance to a portion corresponding to the base of the head of the clubshaft.As another example of a rod-shaped jig, there are Core metals having the same shape are also effectively used in this invention.)
A core mold 11, which is separately molded in the shape of the core of the head body, is supported and fixed with the shaft tip 10a protruding toward the sole surface, and an FRP molding material 12 (broken line) is attached to a portion corresponding to the base of the head body. ) (see Figure 3). on the other hand,
The FRP molding material 12 is separately applied to the cavity 16 having the outer shape of the head of the mold 15 consisting of a pair of left and right split molds 13 and 14 on the face surface 16 of the head body.
It is placed in the portion corresponding to the a side and the back surface 16b side, and then the cavity 1 of this mold 15 is
6, the core mold 11 supported by the rod-shaped jig 10 is placed, and the split molds 13,
After positioning and fixing by the clamping action of the tip 10a of the rod-shaped jig 10 and the protector mounting base by 14, hot pressure molding is performed (see FIGS. 4 and 5). After releasing the mold, the tip 10a of the rod-shaped jig (club shaft) protruding toward the sole surface of the head body 1 is cut off (see FIG. 6), and its open end is tightly sealed. The wood-type club head shown in FIGS. 1 and 2 is obtained.

By the way, as a material for FRP molding, BMC,
SMC or prepreg is used, and its reinforcing fibers are composed of an appropriate combination of carbon fiber, glass fiber, or Kevlar, or a single use of carbon fiber or glass fiber. On the outer circumferential surface of the core type that forms the core of the main body, there are band-like cloths,
The effects of the present invention can also be obtained by winding and covering a prepreg made of pine or hollow weave reinforcing fibers, or by impregnating a core with a synthetic resin solution after winding reinforcing fibers around a core shape. In this case, it is also possible to arrange reinforcing members such as the face plate, sole plate, and mass body together with the FRP molding material, and to integrate the whole body at the same time as the head is hot-press molded.

7 to 9 show a second embodiment of the present invention, in which the core mold remaining in the first embodiment is melted with a solvent such as salt or styrene foam, or a metal , a core mold 21 made of the elutable material 21 is formed using an elutable material 21 that melts by heating, such as wax, and is released from the mold.
The head body 1 is formed into a hollow outer shell by discharging the head to the outside, and a filling core material 23 such as foamed synthetic resin is separately injected and filled into the hollow portion 22.

As explained above, the present invention has the following advantages: A core mold corresponding to the core of the head body is supported and fixed in advance to a rod-shaped jig corresponding to the club shaft shaft, and the core mold is molded into a desired external shape of the head. It is positioned and fixed in the cavity of the mold via a rod-shaped jig, and
By hot-pressing molding with FRP molding material,
It is characterized by obtaining a head body made of an FRP outer shell, which allows for easy molding of complex wood-shaped club heads, easy finishing processing, and cost reduction by improving productivity and mass production. It has excellent practical effects.

[Brief explanation of drawings]

FIG. 1 is an explanatory view showing a first embodiment of a wood-type club head for golf according to the present invention, FIG. 2 is an enlarged cross-sectional view, FIGS. 3 to 6 are explanatory views showing the manufacturing state, and FIG. 9 are explanatory diagrams showing the manufacturing state of the second embodiment of the present invention. 1...Head body, 2...FRP outer shell layer, 3...
... core material, 4 ... club shaft, 5 ... face plate, 6 ... sole face plate, 7 ... mass body, 10 ...
... Rod-shaped jig, 11 ... Core mold, 12 ... FRP molding material, 13, 14, 15 ... Molding mold, 16 ...
... Cavity.

Claims (1)

[Claims] 1. A method for manufacturing a wood-type golf club head comprising the following steps: (a) A core mold corresponding to the core of the head body is fixed in advance to a rod-shaped jig corresponding to the shaft of the club shaft. (b) a step of placing the core mold fixed on the rod-shaped jig together with an FRP molding material forming the head outer shell in the cavity of a mold consisting of a split mold having a desired external shape of the head; (c) A process of clamping the mold and performing hot-press molding. 2. In the method for manufacturing a wood-type club head for golf according to claim 1, the rod-shaped jig protrudes toward the sole surface of the core mold, and is clamped and clamped by both sides of the core mold for FRP molding. A manufacturing method characterized by the fact that the material is thermoformed. 3. In the method for manufacturing a wood-type club head for golf according to either claim 1 or 2, the core mold is coated with an FRP molding material, and a face plate, a sole face plate, a mass body, etc. A manufacturing method characterized by arranging the component parts and integrating the whole at the same time as molding. 4. In the method for manufacturing a wood-type club head for golf according to any one of claims 1 to 3, the core shape is made of wood or a foamed synthetic resin containing or not containing reinforcing fibers, and the core shape remains. A manufacturing method characterized by the fact that 5. In the method for manufacturing a wood-type club head for golf according to any one of claims 1 to 3, the core mold is formed from an elutable material, and after molding,
A manufacturing method characterized by elution to the outside and making the core of the head body hollow. 6. The method for manufacturing a wood-type club head for golf according to claim 5, characterized in that the hollow portion of the head body having an FRP outer shell structure after said molding is separately filled with a core material.