JPH0331475B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to fiber-reinforced plastics (hereinafter referred to as
Regarding the manufacturing method of a wood club head for golf with an outer shell made of (abbreviated as FRP), we have improved the moldability and strength of the FRP outer shell by devising the FRP outer shell and core forming means that make up the head body. This was done to achieve this goal.

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

However, as is well known, with such conventional heads, there are various difficulties in concrete molding due to the complexity of the unique shape of the outer periphery of the head. In order to compensate for the drawbacks such as deformation due to impact (5000 to 10000 kg), reduced repulsion characteristics, and inferior ball flight distance, a reinforcing member was combined with the FRP outer shell in order to reinforce the FRP outer shell from the inside. The method for placement was not disclosed.

This invention aims to eliminate the above-mentioned conventional drawbacks, and its gist is to construct a head outer shell around a core material made of foamed synthetic resin that constitutes the head core. When the FRP molding material is wound and coated and placed in the cavity of the mold having the outer peripheral shape of the head and hot-pressed, it is necessary to make the core material penetrate and hold the FRP outer shell reinforcing members such as columns in the direction of ball hitting. This is a characteristic feature.

Hereinafter, this invention will be explained based on the illustrated embodiments. As shown in FIGS. 1 and 2, 1
is a head body obtained by the manufacturing method described below. The head body 1 is formed of an FRP outer shell 2 and a core material 3 made of foamed synthetic resin, and the core material 3 has a reinforcing member made of hardened FRP in the shape of a pipe or a round bar. Pillar 4
is inserted through the head toward the ball hitting direction, and both ends 4a and 4b of the support 4 are supported by the FRP outer shell 2a on the face portion 1a side and the FRP outer shell 2b on the back portion 1b side of the head main body 1, and The face portion side end portion 4a of No. 4 is configured to be located approximately at a sweet spot portion of the face portion 1a. Also,
In the figure, reference numeral 5 denotes a face plate made of hardened FRP embedded and fixed in the face portion 1a of the head main body 1;
Reference numerals 6 and 7 refer to mass bodies such as a sole weight member and a back weight member made of metal materials such as lead or brass, which are buried in the back portion 1b and the sole portion 1c as necessary, respectively; 8 refers to the head main body 1;
A club shaft is inserted and fixed into the neck portion 1d of the head body, and a cap-shaped protector 9 protects the periphery of the attachment base between the club shaft 8 and the neck portion 1d of the head body. It is placed together with the rolled coating of FRP molding material and integrated 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, a core made of foamed synthetic resin constituting the head core is prepared in advance using a desired mold (not shown). During foam molding of the material 11, the support member 12 is
After penetrating and holding so that the end surfaces of a and 12b are exposed or protruding flush to the face portion side and the back portion side, the reinforcing fibers are impregnated with prepreg or liquid uncured synthetic resin around the core material 11. in a state of
A wood club head as shown in FIGS. 1 and 2 is obtained by winding and covering the FRP molding material 13, placing it in the cavity 15 of a mold 14 having the outer peripheral shape of the head, and hot pressing. .

Incidentally, in the above embodiments, a support member was used as an example of the outer shell reinforcing member, and the shape thereof was explained using a pipe-like or round bar-like shape, but the present invention is not limited to this. It is also possible to use a rectangular bar shape, an I-beam shape, a plate shape, or even a plurality of thin bar-shaped bodies in a bundle, and as another example of the arrangement structure of the reinforcing member, It is also possible to fix the arrangement in the intersecting vertical direction or in the front-back direction according to the present invention.

As explained above, this invention has an FRP outer shell reinforcing member such as a column penetrated through the core material of the head body made of an FRP outer shell to hold it. The shell and back part FRP outer shell are reinforced by being connected by a member such as a support, and when the support is installed, deformation of the face of the head body due to the impact when hitting a ball can be suppressed, and it is possible to prevent the head from deforming due to the impact when hitting the ball. This has excellent practical effects, such as being able to prevent the deterioration of the repulsion characteristics, and making it easy to adjust the balance of the head by appropriately setting the position, shape, or weight of the support member.

Furthermore, in the manufacturing method of the present invention, if the above-mentioned member is held in the ball hitting direction or other direction so that both ends thereof are exposed or protrude from the surface of the core material, the connection between the reinforcing member and the FRP outer shell is improved. It can be made stronger.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a wood club head for golf according to the present invention, FIG. 2 is an enlarged cross-sectional view of the main part, and FIGS. 3 and 4 show the manufacturing state according to the invention. It is an explanatory diagram. 1...Head body, 2...FRP outer shell, 3...
Core material, 4... Support, 11... Core material, 12... Reinforcing member, 13... FRP molding material, 14... Molding die, 15... Cavity.

Claims (1)

[Claims] 1. FRP molding material constituting the outer shell of the head is wound and coated around a core material made of foamed synthetic resin constituting the head core to form a cavity of a mold having the outer peripheral shape of the head. A method for manufacturing a wood club head for golf, characterized in that the core material penetrates and holds an FRP outer shell reinforcing member during placement and hot pressing. 2. The method for manufacturing a wood club head for golf according to claim 1, wherein the reinforcing member is rod-shaped. 3. The method for manufacturing a wood club head for golf according to any one of claims 1 to 2, characterized in that the reinforcing member is FRP. 4. In the method for manufacturing a wood club head for golf according to any one of claims 1 to 3, the outer shell is formed by holding the reinforcing member so as to protrude from the core material. A manufacturing method characterized by