JPS5914865A - Production of wood club head for golf - 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 The present invention relates to a method for manufacturing a golf wood club head having an outer shell made of fiber reinforced plastic (hereinafter abbreviated as FRP), and relates to a method for manufacturing a wood club head for golf with an outer shell made of fiber reinforced plastic (hereinafter abbreviated as FRP). By making improvements, we have been able to improve moldability and repulsion characteristics, and also make it easier to adjust the balance.

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

However, with such conventional devices, as is well known, due to the complexity of the unique shape of the outer periphery of the head, there are various difficulties in adjusting the balance when specifically molding the head, and in particular, it is difficult to adjust the balance due to the unique shape of the outer periphery of the head. The shell was deformed by the impact (5,000 to 10,000kp) when the ball was hit, resulting in poor repulsion properties and poor ball flight distance.

This invention aims to eliminate the above-mentioned conventional drawbacks, and its gist is that a head outer shell is constructed 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 a mold having the outer peripheral shape of the head and hot-pressed, the core material is held by inserting other members such as supports in the direction of ball hitting. It is characterized by:

Hereinafter, this invention will be explained based on illustrated embodiments.
As shown in FIGS. 1 and 2, reference numeral 1 in the drawings indicates a one-piece main body obtained by a manufacturing method described later. The head main 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 support 4 made of hardened FRP in the shape of a pipe or a round bar to support the head. Both ends 4a, 4 of the pillar 4 are installed facing the direction of ball hitting.
b is the face portion 1agllllFRP of the head main body 1;
It is supported by the outer shell 2a and the FRP outer shell 2b on the back portion 1b side, and the face portion side end portion 4a of the support column 4 is configured to be located approximately at the sweet spot portion of the face portion 1a. In the figure, 5 is a face plate made of hardened FRP embedded and fixed in the face part 1a of the head body 1, and 6 and 7 are brass etc. embedded in the back part 1b and sole part IC, respectively, as necessary. A mass body such as a sole weight member and a back weight member made of a metal material, 8 is a club shaft inserted and fixed to the neck portion 1d of the head body 1, and 9 is a connection between the club shaft 8 and the head body neck portion. A cap-shaped protector that protects the area around the mounting base of the head.
It is placed together with the wrapped coating of molding material and is forced to be integrated at the same time as molding.

That is, in order to manufacture the club head according to the present invention described above, as shown in FIGS. During foam molding of the core material 11, the support member 12
is buried and held so that the end surfaces of both end portions 12aJ2b are flush with the face portion side and the back portion side and protrude to the extent that they are exposed, and then the core material 11 is reinforced with prepreg or liquid uncured synthetic resin. By winding and covering the FRP molding material 13 impregnated with fibers, placing it in the cavity 15 of the mold 14 having the shape of the outer periphery of the head, and hot pressing.
A wood club head as shown in FIGS. 1 and 2 is obtained.

Incidentally, in the above embodiment, a support member was used as an example of the member, and the shape was explained using a vibrator shape or a round bar shape, but the shape is not limited to this, and it may be a square bar shape or a round bar shape. ■It is also possible to use beam-shaped or even multiple thin 3-rod-shaped bodies in a bundle, and other examples of moat members include weight members for adjusting the center of gravity and balance of the head. This invention allows it to be fixed to the shell.

As explained above, this invention allows the core material of the head body made of an FRP outer shell to hold other members such as a support, so that such a member is oriented in the ball hitting direction so that both ends thereof are aligned with the surface of the core material. If the core material is held so that it is exposed or protrudes, the FRP outer shell of the face part and the FRP outer shell of the back part of the head body after molding will be connected by a member such as a support, and if a support is provided, It is possible to suppress the deformation of the face of the head body due to the impact when hitting a ball, and prevent the deterioration of repulsion characteristics unlike conventional methods, and also to adjust the balance of the head by appropriately setting the position, shape, or weight of the support member. It has excellent practical effects, such as being easy to perform.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of a golf wood club head according to the present invention, 4- Fig. 2 is an enlarged sectional view of the main part, and Figs. FIG. 1...Head body, 2...
FRP outer shell, 3... core material, 4...
...Strut, 11...Core material, 1
2... Support member, 13... FRP molding material, 14... Molding die, 15... Cavity. Patent Applicant Nippon Gakki Manufacturing Co., Ltd. 1FJWJ'j&fia-148tiJ L5 Procedural Amendment December 13, 1981 Patent Application No. 122743 2, Title of Invention Method of Manufacturing Wood Club Head for Corf 3, Amendment Applicant name (407) Nippon Gakki Mfg. Co., Ltd. 4, Agent address 1-1-5 Minami-Aoyama-chome, Minato-ku, Tokyo Date of amendment order (voluntary) Description 1, Invention Name: Golf wood club head manufacturing method 2, Claims (1) A core material made of foamed synthetic resin that constitutes the head core is wrapped and coated with FRP molding material that constitutes the head outer shell. A method for manufacturing a wood club head for golf, characterized in that: (1) the core material is provided with an FRP outer shell reinforcing material member when placed in a cavity of a mold having an outer peripheral shape of the head and hot-pressed. 1- iQIJ+, a manufacturing method characterized in that t is FRP. 3. Detailed Description of the Invention The present invention relates to a method for manufacturing a golf wood club head having an outer shell made of fiber-reinforced plastic (hereinafter abbreviated as PRP). By devising the means, it is possible to improve the moldability and the strength of the FRP outer shell. 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 things that I have. However, as is well known, with such conventional devices, there are various difficulties in concretely molding the head due to the unique and complex shape of the outer periphery of the head.In particular, the FRP outer shell of the face part is difficult to absorb when hitting a ball ( 5,000~1.0.OO
In order to compensate for the drawbacks such as the deformation caused by the FRP outer shell, which deteriorates the repulsion characteristics and the ball's flight distance, reinforcing members are combined with the FRP outer shell in order to reinforce the FRP outer shell from the inside. The method was not disclosed. This invention aims to eliminate the above-mentioned conventional drawbacks, and its gist is that a head outer shell is constructed 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 a mold having the shape of the outer periphery of the head and hot-pressed, an FRP outer shell reinforcing member such as a support is inserted through the core material in the direction of ball hitting, etc. It is characterized by being held. Hereinafter, this invention will be explained based on illustrated embodiments.
As shown in FIGS. 1 and 2, numeral 1 in the figures is a head main body obtained by a manufacturing method described later. The head body 1
is formed of an FRP outer shell 2 and a core material 3 made of foamed synthetic fjl resin, and the core material 3 has a support 4 as a reinforcing member made of hardened FRP in the shape of a pipe or a round bar. The support column 4 is inserted through the head toward the ball hitting direction.
Both end portions 4a, 41] of the head body 1 are supported by the FRP outer shell 2a on the face portion 1a side and the FRP outer shell 2b on the back portion 11] side, and
a is configured to be located approximately at a sweet spot portion of the face portion 1a. Further, 5 in the figure is a hardened FRP embedded and fixed in the face portion 1a of the head main body 1.
7 - Also a face plate, 6 and 7 are mass bodies such as a sole weight member and a backway 1 member made of a metal material such as lead or brass, embedded as necessary in the back part 1b and sole part 1c, respectively. Reference numeral 8 indicates a club shaft inserted and fixed into the neck portion 1d of the head body 1, and 9 indicates the club shaft 8 and the neck portion 1d of the head body.
This is a cap-shaped protector that protects the periphery of the attachment base of the head.These members are arranged together with the wound coating of FRP molding material during head molding, and are integrated at the same time as molding. In other words, in order to manufacture the club head according to the present invention described above, as shown in FIGS. From (to) During foam molding of the core material 11, the support member 12
After holding the core material 11 by embedding it so that the end faces of both end portions 12a, 121] are exposed or protruding flush with the 7th part side and the back part side, prepreg or liquid liquid is placed around the core material 11. FRP with reinforcing fibers impregnated with hardened synthetic resin
A wood club head as shown in FIGS. 1 and 2 is obtained by winding and covering the molding material 13, placing it in the cavity 15 of a mold 14 having a head outer circumferential shape 4, and hot pressing it. . Incidentally, in the above embodiments, a support member is used as an example of the outer shell reinforcing member, and the support member has a pipe-like or round bar-like shape. However, the present invention is not limited to this. It is not a thing, but a square bar shape or ■
It is also possible to use a beam-shaped, plate-shaped, or even multiple thin rod-shaped bodies in a bundle, and other examples of the arrangement structure of the reinforcing member can be used in the vertical direction intersecting the above-mentioned ball hitting direction. Alternatively, it is also possible to arrange it in the front-back direction and fix it by this separation. As explained above, in this invention, since the core material of the head body made of an FRP outer shell holds an FRP outer shell reinforcing member such as a support, the face part F of the head body after molding is
The RP outer shell and the FRP outer shell of the back part are reinforced by being connected by a member such as a support, and when the support is installed, it prevents the deformation of the head main body face due to impact when hitting a ball. It is possible to prevent the deterioration of repulsion characteristics as in the past, and it has excellent practical effects such as the ability to easily adjust the balance of the head by appropriately setting the position, shape, or weight of the support member. It is something. Furthermore, in the manufacturing method of the present invention, if the member described in ``2'' is held so that both ends are exposed or protrude from the surface of the core material while facing the ball hitting direction or other directions, the reinforcing member and the FRP outer shell can be bonded together. The bond can be made stronger. 4. Brief description of the drawings Fig. 1 is a perspective view showing an embodiment of a golf wood club head according to the present invention, Fig. 2 is an enlarged cross-sectional view of the main parts, and Figs. 3 and 4 are the present invention. It is an explanatory view showing a manufacturing state concerning. 1...Head body, 2...FRP outer shell 3.
... core material, 4 ... pillar 11 ... core material, 12 ... reinforcing member 13 ... FRP
Molding material, 14... Molding mold, 15... Cavity 8-

Claims (1)

[Claims] The FRP molding material constituting the head shell is wound around a core material made of foamed synthetic resin constituting the head core and placed in a cavity of a mold having the shape of the outer circumference of the head. A method for manufacturing a wood club head for golf, characterized in that a core material holds other members.