JPS58136367A - Golf club head and production thereof - 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 a head for a golf club made of plastic (hereinafter abbreviated as CFRP).

Conventionally, golf club heads, especially wood heads, have generally used supplementary materials, but rarely have they been used.Since the supplementary materials themselves are made of natural materials, golf club heads (hereinafter abbreviated as "heads") By the time it is commercialized as
It requires a lot of time and effort, and has disadvantages such as poor yield.Additionally, the resources of the supplementary material itself are decreasing, making it difficult to obtain. Therefore, Jikosho 3!
As proposed in No. 7,3306, a head made of glass fiber reinforced plastic (hereinafter abbreviated as GFR'P), which is made of glass fibers made of polyester 7 and hardened with resin, is known. However, in this GFRP head,
Due to the high specific gravity of glass fiber, the head of the molded product was too heavy in the previous method, and a core material had to be buried inside the head.
Because the core material cannot be held securely in the mold, the VJ material may move due to the pressure during molding and the fluidity of the resin, and the core material may come out on the head surface when molding is completed, or the outside part that forms the head may move. Because the thickness of the shell's (,; Reinforcement methods are also used, but it takes a lot of effort to arrange the fibers, and if the fibers are not properly arranged in the vertical and helical directions, bending due to the impact stress that occurs when hitting the ball can occur. There is a risk that the strength will decrease in response to stresses such as compression and tension.In other words, if the ratio of fiber arrangement in the longitudinal direction is high and the ratio of fiber arrangement in the helical direction is small, the strength will be reduced against stress such as compression and tension. However, since it becomes weak against torsional stress,
It had the disadvantage that it easily broke at the neck. In addition, if the ratio of fiber arrangement in the longitudinal direction is low and the ratio of fibers in the helical direction is high, it will be weaker against bending stress and stronger against torsional stress, resulting in disadvantages such as vertical cracks in the neck area. It had

Therefore, in order to compensate for these shortcomings, Akira Jitsukai! 10-2
No. 07 was also devised, but in this devising, the former had a GF RP head, but the 0FRP head was replaced with a 0FRP head.
By using a manufactured head, the weight of the head can be reduced due to the lower specific gravity, but on the other hand, the following new drawbacks have arisen.

That is, since carbon graphite fibers have a large thread diameter, when short fibers are impregnated with synthetic resin and kneaded, they cannot be kneaded well and become taut and lumpy, resulting in poor workability. If the ink is filled into the mold and molded into a head, the fiber content of carbon graphite fibers will be around 30%, resulting in insufficient strength, especially in the neck part of the head. Since it does not have strength unless it is 0% or more, the neck part has weak strength and has the disadvantage of being easily broken at the neck part due to impact stress when hitting the ball. In addition, the fiber content of carbon graphite fiber is low at around 30%, and the resin content is 70%.
%, the abrasion resistance of the saw/saw part of the head was significantly reduced, and the saw part was easily scraped off by dirt and sand during use, resulting in chipping.

In addition, if a head is made only from carbon graphite fibers, the position of the center of gravity and weight balance of the head will be poor, which will reduce the moment of inertia that occurs when hitting the ball, making the head more likely to wobble and slow Bohr's performance. It had drawbacks such as poor directionality.

1. In view of these conventional drawbacks, the present invention provides a CFRP head that improves the center of gravity position and weight balance of the rad, strengthens the strength of the neck part, has good productivity, and is durable. This is a golf club head made for the purpose of golf and a method for manufacturing the same.

If the present invention is explained based on the drawings, No. 1 to No. 7 will be described.
As shown in the figure, a side saw member L2 in which a side metal part 7 and a sole part // are integrated is placed in a lower mold having a Go/Ref head shape, and 2ν part // An arbitrary shape protruding inward 4) After inserting and supporting the core material /S into the core material support pin / 3, the mandrel / O is inserted into the neck part of the head to form a roughly neck shape. A neck reinforcing member /9 coated with a braid made of carbon graphite fibers impregnated with a synthetic resin /g is placed around the outer periphery of the neck core material /7 having carbon graphite fibers impregnated with a synthetic resin. A carbon-graphite fiber-reinforced plastic goggle characterized by filling an outer shell reinforcing member 2° in which short fibers are impregnated with a synthetic resin, placing a stopper mold, and molding under pressure and heat. A head for a reflex club and a method for manufacturing the same.

In the head according to the present invention, the side metal portion 1
Since the design uses the side sole member L, in which the 0 and saw parts// are integrated, and the δ material/S, the core material/S is used to reduce the weight increased by the side sole members. By reducing the weight of the outer shell reinforcing layer 2o, optimizing the head weight balance and designing the center of gravity to be lower, the moment of inertia of the head is increased, and the bounce of the head when hitting a ball is significantly reduced. Therefore, the directionality of the ball is improved.

In addition, since the side sole member /2 is provided with a protruding support pin /3 for inserting and supporting the core material /S, the core material /S is inserted and supported.
Since S can be securely fixed in the center of the head, it is possible to prevent the conventional drawbacks such as the stone moving due to the pressure during molding and the fluidity of the synthetic resin, which reduces the yield of the product, and improves quality. Heads with stable and good yields can be manufactured. Furthermore, since the outer shell reinforcing layer 20 of the head can be formed in one way, the strength of the head itself is improved.

Moreover, since no strange sounds occur when hitting the ball, a head with a good feel can be obtained.

In addition, in the head of the present invention, a neck reinforcing member 17 and a neck reinforcing member 9 made of carbon graphite fiber braid/zag are arranged in the neck part. Even though the content of carbon kushifrite fibers is 60% or more, the neck core material/7 prevents the weight of the neck from increasing, and the braid/zag prevents the neck core material from increasing as shown in Figure 4. By spreading out along the shape of /7, the thickness of the reinforcing layer at the neck part becomes uniform, making it strong and strong.In addition, the braid spreads out without converging, so it is resistant to bending stress and torsional stress. Because it has well-balanced strength, there is no difference in strength depending on the fiber arrangement direction or arrangement ratio as in the past, and durability is significantly improved.

As an example of the oil-water invention, side sole member/2
As shown in FIG. 5, the shape of the core support pin/3 protruding from the core member is provided with a protruding part/g below the pin, and the protruding part/4 is
By embedding No. 1 in the head outer shell reinforcing layer 20, the bonding force between the side sofa member 2 and the head outer shell reinforcing layer 20 is significantly improved. Also, side saw/shield part 2
Since the saw/saw portion of the saw head is coated, the shore abrasion resistance of the saw portion is significantly improved.

As described above, the head according to the present invention can provide a head for a Bollev club made of carbon graphite fiber with good productivity and durability.

[Brief explanation of drawings]

FIG. 1 is a plan view of a golf club head. FIG. 2 is a sectional view showing a cross section of a conventional GFRP head for a Goref club, taken along line A-A. FIG. 3 is a sectional view showing a cross section of a conventional CFRP golf club head. Figure q is a cross-sectional view showing a part of the manufacturing process of the golf club head according to the present invention. Figure 6 is a perspective view showing the neck portion reinforcing member of the golf club head according to the present invention. . 7 and 5 are a perspective view showing a side sole member under the head of a golf club according to the present invention; FIG. Oru.／・e・Korilev club head, 2...shaft,
3...eGFRP layer, G...core material, 5...golf club head, Otsu...-C11'1\P layer, 7 fist...shaft, za...lower mold, 9...・Upper mold, 10...
Side metal part, //...Fist sole part, /2--
... Side sole member, /3 ... Core material support bottle, /
ri...Protrusion part, 15...core material, /B...mandrel assembly, △E...neck portion reinforcing member, 20...outer shell reinforcing layer.

Claims (1)

[Claims] / Carbon graphite fiber-reinforced plastic rubber formed from carbon graphite fibers and synthetic resin /
In a head for a reflex club, a side sole member in which a side metal part and a sole part are integrated is inserted into the center part of the head, and the sole part of the side saw member has an arbitrary shape. A supporting pin for supporting the core material is provided protrudingly, and the core material is inserted and supported by the pin for supporting the core material. In addition, a neck reinforcing layer is formed on the outer periphery of the core material at a location corresponding to the neck portion of the head, which has an approximately neck shape, and is coated with an appropriate number of braids made of carbon graphite fibers. The part is C with carbon graphite fiber and carbon graphite △ with carbon graphite fiber as standby. Golf club head made of reinforced plastic. 2 In the lower mold having the head shape for a Gollef club,
A side sole member is arranged with a side metal part and a saw/shibe part, and the core material is inserted and supported by a core material support pin having an arbitrary shape that protrudes inside the sole part of the side sole member. After that, a neck reinforcing member covered with a braid made of carbon graphite fibers impregnated with synthetic resin is placed around the outer periphery of a neck core material having a roughly neck shape into which a mandrel is inserted at a location corresponding to the neck part of the head. Further, after filling other voids with an outer shell reinforcing member made of carbon graphite fiber short fibers impregnated with synthetic resin, an upper mold is placed and pressure and heat molding is performed. A method for manufacturing a golf club head made of Daraphite fiber-reinforced plastic.