JPS58203775A - Head for golf club - 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 provides a golf club made of carbon graphite fiber reinforced plastic (hereinafter abbreviated as CFRPij).
Conventionally, it has been common to use rods for wood and rad, especially for wood and rad. However, since the bar itself is made of natural material, the golf club head (hereinafter abbreviated as \RAD)
It takes a lot of time and effort to commercialize it as a product.
It also had drawbacks such as poor yield. In addition, there have been problems such as the bar material itself is decreasing in terms of resources and is becoming difficult to obtain. Therefore, Jikosho 3'! 7/,! ;! 0. ! As stated in the idea in the issue, it is made of glass fiber reinforced plastic (hereinafter referred to as GFRP), which is made by hardening glass fiber with polyester resin.
The head of the company (hereinafter referred to as “manufactured”) has become publicly known. However, in this GFRP head, because the specific gravity of glass fiber is high, the head weight of the molded product would be too heavy if it were left as is, so a core material had to be buried inside the head, but conventional methods In this case, the core material cannot be held securely in the mold, so the core material moves due to the pressure during molding and the fluidity of the resin, and the core material comes out on the head surface when molding is completed, or the head is formed again. The thickness of the GFRP layer of the outer shell became uneven, resulting in a decrease in strength and failures such as breakage.

In addition, a method of reinforcing the neck by arranging glass fibers in the vertical and spiral directions has been adopted, but the process of arranging the fibers is very time-consuming and, in addition, the fibers are arranged in the longitudinal and helical directions. If things go wrong, there is a risk that the strength will be lowered against stresses such as bending, compression, and tension caused by the impact stress generated when the ball is hit. If the ratio of fiber arrangement in the beating longitudinal direction is high and the ratio of fiber arrangement in the helical direction is small, it will be strong against bending stress, but will be weak against torsional stress, so it will be easy to crack the neck part. It had a chip that caused it to break.

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 weak against bending stress and strong against torsional stress, resulting in vertical cracks at the neck part. It had a deficiency.

Therefore, in order to compensate for these shortcomings, the
No. 7 was also devised, but in this devising,
The former is a GFRP head that is rarely found in CFRPI! !
! Although the head was able to reduce the specific gravity and the rad weight, it also introduced the following drawbacks.

That is, because carbon graphite fibers have a large thread diameter, when short fibers are impregnated with synthetic resin and kneaded, they cannot be mixed well and become bulky and clumpy, making it difficult to work with. In addition, if the head is formed by filling the mold as is, the fiber content of the carbon graphite fiber will be 30% α11, so the strength will be insufficient, especially in the neck part of the head. Contains carbon graphite fibers, which had disadvantages such as weak strength at the neck and easy breakage at the neck due to impact stress when hitting the ball. The resin content is low at around 30%, and the resin content is 7.
Because of the high content of around 0%, the abrasion resistance of the sole of the RAD was significantly reduced, and the sole had the disadvantage of being easily scraped off by dirt and sand during use.

In addition, if the weight of the conventional fiber-reinforced plastic head is light after molding, it is necessary to drill a hole in the head and insert a weight into it to adjust the weight of the head.
Due to poor workability, there were drawbacks such as cracks occurring on the rad and poor appearance.In view of these conventional deficiencies, the present invention simplifies the weight adjustment and balance adjustment of the molding head. This is a golf club head designed to provide a CIP head that has a strong neck part, good productivity, and is durable.

Embodiments of the present invention will be described based on the drawings. As shown in FIGS. g
A side sole member 10 is formed in each of the side metal portions B, and each side sole member 10 is provided with a protrusion for supporting a core material, and a core body // is attached to a braided or woven fabric made of carbon or other arbitrary fibers. A neck having a substantially neck shape is formed by supporting the core material /3 covered with 2 and placing it in a lower mold /g in the shape of a golf head, and inserting a mandrel /g into the neck region of the head. On the outer periphery of the core material /S, a neck reinforcing member M1 covering the braid /B made of synthetic resin-impregnated carbon fibers is placed, and the upper mold 2/ is placed. After filling the gap between the mold and the main body with an outer shell reinforcing member/9 made of chopped strands or mats of carbon or other suitable fibers impregnated with a synthetic resin, the material is pressurized and heat molded. This is a head for a golf club.

In the second embodiment, a weight storage part g for weight adjustment and a protrusion 7 for supporting a core material are provided in a side saw frame member l consisting of a side metal part B and a sole part 7, and a center part is attached to the protrusion for supporting the core material. Supporting the core material /3 formed by covering the core body // with a braided or woven fabric /2 of carbon or other arbitrary fibers,
A neck reinforcing member made of arbitrary fibers of carbon impregnated with synthetic resin is placed in the neck area of the head via a mandrel/g, and the upper Mold 2 is placed, and in the gap between the mold and the main body, an outer shell reinforcing member is made by impregnating chopped strands or mats of arbitrary fibers of carbon or oil with synthetic resin/9
This golf club head is characterized by being filled with the following ingredients and then pressurized and heat molded.

In the head according to the present invention, a side saw/shield member 10 in which a side saw/shield part O' and a sole part 7 are integrated.
- A weight storage part for adjusting the weight of the Rad is provided, and a protrusion 7 for supporting the core material is provided, and the protrusion is provided with the core material/
3, so if the finished weight of the head is slightly lighter, or if it is necessary to adjust the wing balance when assembled to a golf club, use the side sole member - B. Insert the weight 22 of the required weight into the weight adjustment weight storage part provided at ρ-, and tighten the screw 23.
By sealing the head with something like this, it is very easy to adjust the weight and balance, but the head itself often requires special external processing, which may cause cracks in the head.
This eliminates the problem of poor appearance and greatly improves the yield of the molding head.

In addition, since the side saw member M Ω is provided with a protrusion for supporting the core material 11 that supports the core material 11, the core material M can be securely fixed at the center of the head, unlike conventional To,
It is possible to prevent defects such as the movement of the core material due to the pressure during molding and the fluidity of the synthetic resin, resulting in a decrease in the yield of the product, and it is possible to produce a product with stable quality and a good yield. In addition, as the core material /3, we are using a core material // which is covered with a braided or woven fabric /2 of carbon or other arbitrary fibers, so unlike the conventional method, only chopped strands or mats can be used. It is possible to prevent voids that tend to occur when a rad shell reinforcing layer is formed, and defects such as the occurrence of non-glue portions that occur due to insufficient fiber content. In addition, by inserting and joining together the ends of the braid or fabric /2 covering the core body // and the ends of the braid /2 forming the neck part reinforcing member A1, the neck part Since the bonding strength between the RAD body and the RAD body is significantly improved, there is no risk of cracks or breakage due to repeated impact stress caused by batted balls, making it extremely durable. I found that it improved. In addition, in the present invention, the thickness of the RAD outer shell reinforcing member can be adjusted as designed;
The strength of the head itself is improved, and the ball does not make strange noises when hitting the ball, so you can get a good feel. .

In addition, in the ・＼rad of the present invention, the neck core material /! A neck reinforcing member consisting of a braid of carbon and other arbitrary fibers is arranged with or without intervening, but by arranging it in this way, the content of carbon and other arbitrary fibers in the neck part can be reduced. Wonderful view. % or more, neck core material/! When using the reinforcement layer, the weight of the neck part is prevented from increasing, and the braid 2 spreads along the shape of the neck core material/S as shown in Figure 3, so the thickness of the reinforcing layer in the neck part is uniform. In addition, since the braid diffuses instead of converging, it has good strength against bending stress and torsional stress, so there is no difference in strength depending on the fiber arrangement direction or arrangement ratio as in the past. There is no occurrence of this, and durability is significantly improved.

As an example of the pond, the same effect can be obtained by using a woven fabric other than a braid as the neck reinforcing member/7, but in terms of workability, it is better to use a braid or a cylindrical woven fabric. Workability will be better.

In addition, as the outer shell reinforcing member of the head, carbon or other arbitrary fibers such as Chosobdostrantyamat or SMc can be used.
(sheet molding compound) etc. can be arbitrarily selected.

Furthermore, as another embodiment, as shown in FIG. 7, a protrusion for supporting the core material is provided protruding from both the side metal part A and the sole part 7 of the side sole member ZO, so that the core material can be supported. support can be further ensured.

Also, as shown in FIG. 70, by providing a protruding piece 241 around the weight storage part for adjusting the weight of the Rad, and embedding the protruding piece 241 in the outer shell reinforcing member /9 of the head, the side saw 7 In the head of the present invention, the bonding force between the reinforcing member unit and the outer shell reinforcing member/7 of the head is significantly improved.
A combination of the above-mentioned embodiments is also possible, and since the sole part of the head is covered with the reed and side sole member 10,
It will not damage the sole part.

As detailed above, the head according to the present invention can provide a golf club head made of carbon or other arbitrary fibers with good productivity and durability.

[Brief explanation of the drawing]

Figure 2 is a plan view of the rad for golf clubs. FIG. 2 is a cross-sectional view taken along line A-A of a conventional GFRP head for a Golef club. FIG. 3 is a sectional view of a conventional CFRP Goref club head. FIG. 3 is a perspective view showing an example of a method for inserting the side sole member and core material made according to the present invention. FIG. 3 and FIG. 3 are perspective views showing a neck portion reinforcing member made according to the present invention. FIG. 7 and FIG. 7 are cross-sectional views taken along line A-A and line B-B in FIG. Diagram 1,
FIG. 70 is a perspective view showing a side saw/saw member according to another embodiment of the present invention. /...I\rad 2...-shaft, 3...CFR
P layer, Ri... Core material, 3... CFRP layer, B... Side metal part, 7, , Sole part, Z... Weight storage area for important adjustment, 7... Core material support Protrusion for use, 10...side saw/shielding member, //...core body, /2...braid, /3...core material, /41IIψO mandrel, 〆!・
・・Neck core material, /Otsu・Braid, /7・Neck part reinforcement member, /Za・Lower mold, /9・Outer shell reinforcement member, 2/・・Upper metal mold Mold, 22...weight, 23...pinu, 2g...projection.

Claims (1)

[Scope of Claims] / A side sole member made of optional fiber-reinforced plastic for golf clubs is provided with a side sole member in which a rad side metal part and a knob part are integrated, A housing portion and a core material supporting protrusion are respectively provided, and the core material supporting protrusion supports a core material in which the core material is covered with a braided or woven fabric of arbitrary fibers of carbon fiber, and is used for weight adjustment. Store the weight in the weight storage section. In addition, a core material having a substantially neck shape is interposed in the neck region of the head, and a neck reinforcement layer made of a braided or woven fabric of carbon or other arbitrary fibers is formed on the core material, and the other parts are 1. A golf club head comprising an outer shell reinforcing layer made of chopped nutland or mat of carbon, any fiber, or the like. 2 In a golf club made of carbon or other fiber-reinforced plastic, a side saw member in which a rad side metal part and a saw part are integrated is disposed, and the side sole member has a , a weight storage part for weight adjustment of arbitrary shape and a protrusion for supporting the core material are provided, respectively.
The core material supporting protrusion supports the core material formed by covering the core material with a braided or knitted fabric made of arbitrary fibers of carbon fiber, and has two protrusions for storing and storing the weight in the weight system storage section. In the neck region of the head, a neck reinforcing layer is formed of a braided or woven fabric made of carbon or any other fiber, and the neck portion is made of carbon or other fibers such as Chosopudnutland or mat. ＼RAD for Gollef Crag, which is characterized by being composed of an outer shell reinforcing layer. 3 The core material supporting protrusion is inserted from the inside of the side metal part,
The rad for a golf club according to claim 1 or 2, characterized in that an arbitrary number of protrusions are provided. H. Claims 1 or 2, characterized in that an arbitrary number of the core material supporting protrusions protrude from the inner side of the sole portion.
For golf clubs listed in the section ＼RAD. S. The golf club according to claim 1 or 2, wherein the core material supporting protrusion is provided in the shape of a projecting piece on the outer side of the weight adjustment weight storage part provided in the sole part. Head for.