JPH0450050Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a golf club head in which a weight member can be fixed in a fixed position and the weight of the head body can be easily adjusted during molding.

[Prior art]

Conventionally, wood golf club heads are made by integrally molding a core inside a head body made of carbon fiber reinforced plastic (CFRP) and a sole plate outside (particularly when the head weight is large compared to the head volume). The process of embedding a weight member (weight adjustment member) for adjusting the weight of the head in the head body during integral molding is complicated, and the process of embedding the weight member (weight adjustment member) for adjusting the weight of the head during head molding and ball hitting is complicated. There was a problem with stability inside the head body.

[Purpose of invention]

In this invention, a core of a predetermined shape is integrally molded with a metal weight member, and an outer shell mainly made of carbon fiber reinforced plastic is integrally molded onto this core, making it easy to mold. In addition, it is an object of the present invention to provide a golf club head in which the internal weight member does not move from a predetermined position during use, and furthermore, the weight of the head body can be easily adjusted during molding. .

[Structure of the idea]

In order to achieve the above-mentioned purpose, this invention has a core made of heat-resistant and molding pressure-resistant material that is integrally molded in advance, and an outer surface made of carbon fiber-reinforced plastic as the main material, except for the sole part. The gist is that the shell is integrally molded, and when the core is molded, a granular metal weight member with a large specific gravity is disposed and integrally molded.

Hereinafter, the configuration of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is an explanatory view showing the appearance of an example of the golf club head of the present invention. In FIG. 1, a golf club head 1 has a sole plate 2, which is the part that contacts the ground when hitting a ball, and a face 3, which is the part that contacts the ball.

FIG. 2 is a sectional view taken along line A--A in FIG. 1. Second
In the figure, a core 4 is contained within the head body a. The material of the core 4 is, for example, a castable heat-resistant resin such as urethane resin that can withstand the head molding temperature (125°C to 135°C) (for example, HEI-CAST 3012 W manufactured by Etsuke & Kei Co., Ltd.). ). Alternatively, it may be made of hard rubber that can withstand molding pressure. Examples of hard rubber include 100 parts by weight of cis 1,4 BR, 45 parts by weight of zinc diacrylate, and zinc oxide.
14 parts by weight, peroxide 2.5 parts by weight, etc. (Japanese Patent Application Laid-Open No. 60-232180).
Additionally, syntactic forms can be used. Examples of the syntactic form include TETRAD-X (Mitsubishi Gas Chemical) 31.7 parts by weight;
A material consisting of 68.3 parts by weight of methyl hymic acid anhydride and 28.7 parts by weight of a glass balloon may be used (Japanese Patent Application Laid-open No. 122580/1983).

Inside the core 4, granular weight members 5 are mixed. The material of the weight member 5 is a metal with high specific gravity such as lead. The grain size of this weight member 5 is approximately 1 mm to 3 mm.

To mix the weight members 5 in the core 4, for example, place the core mold with the sole plate side facing down, insert the required amount of weight members 5 in the required positions in this mold, and then add a castable mold. All you need to do is inject heat-resistant resin. As a result, since the weight of the weight member 5 is greater than the weight of the material of the core 4, a large amount of the weight member 5 is mixed at the bottom of the core 4 as shown in FIG. When a large number of weight members are mixed at the bottom of the core in this way, a golf club with a low center of gravity can be obtained.

[Effect of idea]

As explained above, the head body is made of a core that is integrally molded in advance from a material that is heat resistant and can withstand molding pressure, and an outer shell mainly made of carbon fiber reinforced plastic is integrally formed on the outer peripheral surface of the core, excluding the sole part. When the core is molded, a granular metal weight member with a large specific gravity is disposed and integrally molded, so that the following excellent effects can be achieved.

A core of a predetermined shape is integrally molded in advance with a mixture of metal weight members, and an outer shell mainly made of carbon fiber reinforced plastic is integrally molded onto this core, making the molding work easy. I can do it.

When molding the head body, a core mixed with a weight member of an appropriate weight can be easily selected and used, so that the weight of the head can be easily adjusted.

Since the core and weight member can be set simultaneously during head molding, processing is extremely convenient.

Since the core mixed with weight members can be easily molded by a method such as casting, the amount and position of the weight members can be easily adjusted, and processing is extremely convenient.

A large number of weight members can be mixed at the bottom of the core, thereby making it possible to obtain a golf club with a low center of gravity.

[Brief explanation of drawings]

FIG. 1 is an explanatory view showing the appearance of an example of the golf club head of the present invention, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1... Golf club head, 2... Sole plate, 3... Face, 4... Core, 5... Weight member. a...Head body.

Claims (1)

[Scope of utility model registration request] In a golf club head made of carbon fiber-reinforced plastic, the head body is made of a core that is integrally molded in advance from a material that is heat resistant and can withstand molding pressure, and the outer circumferential surface of the head body, excluding the sole portion, is made of carbon fiber-reinforced plastic as the main material. 1. A golf club head, characterized in that an outer shell is integrally molded, and a granular metal weight member having a large specific gravity is disposed and integrally molded when the core is molded.