JPH049062B2 - - Google Patents
Info
- Publication number
- JPH049062B2 JPH049062B2 JP57209008A JP20900882A JPH049062B2 JP H049062 B2 JPH049062 B2 JP H049062B2 JP 57209008 A JP57209008 A JP 57209008A JP 20900882 A JP20900882 A JP 20900882A JP H049062 B2 JPH049062 B2 JP H049062B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- mold
- foam core
- reinforced
- liquid resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000006260 foam Substances 0.000 claims description 49
- 239000004744 fabric Substances 0.000 claims description 35
- 229920005989 resin Polymers 0.000 claims description 32
- 239000011347 resin Substances 0.000 claims description 32
- 239000000835 fiber Substances 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 19
- 239000012783 reinforcing fiber Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000010097 foam moulding Methods 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 9
- 239000004917 carbon fiber Substances 0.000 description 9
- 230000005484 gravity Effects 0.000 description 9
- 235000009508 confectionery Nutrition 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000003822 epoxy resin Substances 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- 229920003002 synthetic resin Polymers 0.000 description 6
- 239000000057 synthetic resin Substances 0.000 description 6
- 229920001187 thermosetting polymer Polymers 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 229920005992 thermoplastic resin Polymers 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920001225 polyester resin Polymers 0.000 description 3
- 239000004645 polyester resin Substances 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 235000011511 Diospyros Nutrition 0.000 description 2
- 244000236655 Diospyros kaki Species 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
- 235000011613 Pinus brutia Nutrition 0.000 description 2
- 241000018646 Pinus brutia Species 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- 229920001567 vinyl ester resin Polymers 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229920000271 Kevlar® Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000004761 kevlar Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Golf Clubs (AREA)
Description
本発明は、外観に優れ且つ強度や反発特性に優
れ、またスイートスポツトが広くヘツドの慣性モ
ーメントが大きな生産性に富むゴルフクラブ用ヘ
ツド及びその製造法に係わり、詳述するとゴルフ
クラブヘツドにはウツドとアイアンがあるが、本
発明はウツドのヘツドに関するものである。
The present invention relates to a golf club head that is excellent in appearance, has excellent strength and repulsion characteristics, has a wide sweet spot, and has a large moment of inertia of the head, and is highly productive. However, the present invention relates to a wood head.
従来ゴルフクラブ用ウツドのヘツドとしては、
柿の木が最上とされていた。ヘツド用の太さを有
する柿の木は非常に少なく、多量に入手するのは
困難になつてきている。そこで、薄い板を貼りあ
わせて作つた合板製のヘツドが使用されるが、板
が貼りあわせてあるため打撃音等において劣り好
まれない。その上、合板製ヘツドといえ、その均
一な材料の多量入手は困難である。また、天然木
材はすべて製造工程における湿度コントロールが
難しい上に、乾燥させる工程や、切削加工に多大
の労力を有するものである。さらに、使用するに
あたり吸湿して脹れたり、割れたりしやすかつ
た。
そこで、金属製のヘツドや、繊維強化熱可塑製
樹脂ヘツドや、発泡体を芯として表面に繊維強化
プラスチツク層を設けたもの等が現在市場に出回
つている。又、特開昭52−49131号公報に記載さ
れているように、繊維強化発泡体によるゴルフク
ラブヘツドが提案されている。
Conventional heads for golf clubs include:
The persimmon tree was considered the best. There are very few persimmon trees that are thick enough for heads, and it is becoming difficult to obtain them in large quantities. Therefore, a plywood head made by laminating thin plates is used, but since the plates are laminated together, it produces poor impact noise and is not preferred. Furthermore, even though the head is made of plywood, it is difficult to obtain a large amount of uniform material. Furthermore, it is difficult to control humidity during the manufacturing process for all natural wood materials, and the drying process and cutting process require a great deal of labor. Furthermore, they tend to absorb moisture and swell or crack when used. Therefore, metal heads, fiber-reinforced thermoplastic resin heads, and heads with a foam core and a fiber-reinforced plastic layer on the surface are currently on the market. Further, as described in Japanese Patent Application Laid-Open No. 52-49131, a golf club head made of fiber-reinforced foam has been proposed.
【発明が解決しようとする課題】
しかしながら、金属製ヘツドは金属の比重が大
きいため、ヘツド形状が小さくなりプレイヤーに
不安を与えるという課題があつた。また、繊維強
化熱可塑製樹脂ヘツドは、比重が大きく金属と同
様の課題がある上、圧縮弾性率が低く反発係数が
悪いという課題があつた。さらに、発泡体を芯と
して表面に繊維強化プラスチツク層を設けたもの
は、設計の自由度が比較的大きくなるが、芯体に
発泡体を用いているため圧縮剛性が低く反発係数
が十分高くならないという課題があつた。そして
繊維強化発泡体によりなるヘツドは、反発係数や
圧縮剛性は大きいが、均一体のためスイートスポ
ツトが狭く又ヘツドの慣性モーメントが小さいと
いう課題があつた。
本発明は上記欠点に鑑みてなされたものであ
り、外観に優れるとともに強度や反発特性に優
れ、且つスイートスポツトが広く又ヘツドの慣性
モーメントが大きいゴルフクラブヘツド及びその
製造法を提供することを目的としたものである。[Problems to be Solved by the Invention] However, since the metal head has a high specific gravity, the shape of the head becomes small, which causes anxiety to the player. Additionally, fiber-reinforced thermoplastic resin heads have the same problems as metals due to their high specific gravity, as well as low compressive modulus and poor coefficient of restitution. Furthermore, products with a foam core and a fiber-reinforced plastic layer on the surface offer a relatively large degree of freedom in design, but because the core is made of foam, the compression stiffness is low and the coefficient of restitution is not high enough. There was a problem. Heads made of fiber-reinforced foam have a high coefficient of restitution and high compression rigidity, but because they are uniform, they have a narrow sweet spot and a small moment of inertia. The present invention has been made in view of the above drawbacks, and an object of the present invention is to provide a golf club head that has an excellent appearance, excellent strength and repulsion characteristics, a wide sweet spot, and a large moment of inertia of the head, and a method for manufacturing the same. That is.
そこで、発明者はこれらの課題を解決する目的
として本発明に到つた。すなわち、本発明のゴル
フクラブヘツドは、液状樹脂に強化繊維を混入し
て発泡成形した強化発泡芯体の表面に、上下を繊
維によつて係合させてなる重組織の強化繊維クロ
スを該発泡芯体と一体に設けた技術手段を講じた
ものである。
また、本発明のゴルフクラブヘツドの製造法
は、型内に液状樹脂を含浸させた繊維塊を載置し
加熱、加圧して発泡、硬化させた、いわゆる繊維
強化発泡芯体の表面に上下を繊維で係合してなる
重組織の強化繊維クロスで覆うとともに金型内に
配置し、そして金型内の該クロスに熱硬化性樹脂
を加圧注入含浸させた後加熱、硬化させた技術手
段を講じたものである。
このようにして得られたヘツドは、外観に優れ
るとともに強度や反発特性に優れ、また殻構造の
ためスウイートスポツトが広くヘツドの慣性モー
メントが大きいという特徴を有している。
本発明に用いられる繊維強化発泡芯体は、ゴル
フヘツド外形形状より小さく略相似形であるが、
重心の配置等の設計上の配慮がある場合はこの限
りではない。即ち、重心をソール面に近づける場
合は、重組織を有する強化繊維のクロス層のソー
ル面の厚みを増大させるとともに反対の上面部の
該クロス層を薄くする。この場合は、繊維強化発
泡芯体のソール部分を削り、該発泡芯体の上面を
ふくらました形状にする。また、トウとヒールに
質量を配分しスイートスポツトを大きくしたい場
合は、弾性率の高い繊維強化発泡芯体のトウとヒ
ールを削り重組織を有する強化繊維のクロス層の
厚みを増大させる。
繊維強化発泡芯体の比重は、重組織を有する強
化繊維のクロス層の比重に比べ小さいことが設計
上の自由度を大きくし、好ましい比重は1.2以下
である。
また、繊維強化発泡芯体の弾性率は、200／mm2
以上であれば本発明の効果は著しくあらわれる。
従来の発泡芯体の弾性率は100／mm2以下である。
本発明の繊維強化発泡芯体に用いられる繊維
は、ガラス繊維、ケブラー繊維、ポリアミド系高
弾性繊維、カーボン繊維等が用いられる。繊維強
化発泡芯体の比重を小さく弾性率を大きくするに
はカーボン繊維が最もすぐれているが、他の繊維
を混合あるいは単独に用いても十分効果がある。
また、繊維含有率を2wt％〜60wt％程度用いるの
が本発明における効果が著しい。
本発明の繊維強化発泡芯体に用いられる発泡用
の樹脂は、熱可塑性樹脂でもよいし、熱硬化性樹
脂でもよいし、熱硬化性樹脂でもよい。熱可塑性
樹脂としては、ABS樹脂、塩化ビニール樹脂、
ナイロン樹脂、ポリカーボネート樹脂等が用いら
れる。また、熱硬化性樹脂としてはウレタン樹
脂、エポキシ樹脂、ホリエステル樹脂等が用いら
れる。また、繊維強化発泡芯体の強化に用いる繊
維の繊維長は、0.1mm以上あれば十分発明の効果
はあらわれる。さらに、繊維強化発泡芯体の気泡
部分の体積は、10％〜90％の範囲にある場合に本
発明の効果は著しい。
本発明の繊維強化発泡芯体の製造法としては、
射出成形でもよいし、Ｒ−RIM法や特開昭52−
49131号公報に示される方法、即ち、合成樹脂と
して発泡性を有し、初めにおいては液状であり、
または高温にすることによつて液状となり、比較
的短時間のうちに硬化する性質を持つた樹脂を選
び、そして繊維塊に上記液状合成樹脂を含浸させ
て型に投入し、繊維塊に含浸した合成樹脂が未だ
発泡しない以前に型を閉じ、しかるのち、上記繊
維塊に含浸した合成樹脂液状体を発泡、硬化させ
る方法、が用いられる。
本発明の繊維強化発泡芯体の表面に設けられる
重組織を有する強化繊維のクロス層の繊維として
は、カーボン繊維、ケプラー繊維、ガラス繊維等
が用いられ、繊維形態としてはロービング、織
物、編組、マツト状等が用いられ、これらが材質
としても形態としても単独又は組み合わせて使用
される。
繊維強化発泡芯体に強化繊維を配置するには十
分な注意が必要である。即ち、ゴルフヘツドを包
むように配置するには、平面状のクロスやマツト
あるいは筒状の編組チユーブの場合、一部を切つ
たり、重ねたりする必要があり、この切断部分と
重ね部分を少なくして、強度、反発特性、外観上
等問題にならない部分に配置することが好まし
い。この切断部分や重ね部分が多いと強度が低下
する。また、外観上問題のない部分としてはソー
ル面に切断部分や重ね部分を配置させるのが好ま
しい。このように出来るだけ切断部分が少なく、
重ね部分の少なくなる強化繊維形態が好ましい
が、特に形態が変形しやすい重組織を有するクロ
スが好ましい。重組織を有するクロスはカーボン
繊維のみならずどの繊維にも用いることができ
る。重組織を有するクロスとしては、二重、三重
等がある。また、重組織を有するクロスは厚み方
向にも一部繊維が配向しているため剥離強度が大
きく、且つ厚さ方向の弾性率が大きいため反発特
性が著しく優れているという特徴をも有する。カ
ーボン繊維を用い織目を粗くした重組織を有する
クロスは特に形態が変形しやすく、ヘツド形状の
繊維強化発泡芯体を包みこんだ場合、しわ及び重
ね合わせ部分が少なく出来る上、重組織になつて
いるカーボン繊維が繊維強化発泡芯体の全面を容
易に包むことができる。これが一層のクロスの場
合、形態変形しやすいように織目を粗くしたなら
ば、〓間が生じ繊維強化発泡芯体表面を強化繊維
で覆うことができない。
本発明の重組織を有する強化繊維のクロス層に
用いる結合材用樹脂としては、エポキシ樹脂、ポ
リエステル樹脂、ビニエステル樹脂、ウレタン樹
脂等の熱硬化性樹脂が用いられる。
本発明によるゴルフクラブヘツドの製造法とし
て、該ヘツドの繊維強化発泡芯体は予め別型で成
形される。繊維強化発泡芯体は大きなブロツクか
ら削り出されてもよいし、またゴルフクラブ形状
に成形されたものを用いてもよい。さらに、繊維
強化発泡芯体の金型に入れる前の大きさは、金型
のキヤビテイ形状より小さくするのが一般的であ
るが、必ずしも限定されない。
そして、繊維強化発泡芯体の周囲に重組織を有
する強化繊維のクロス層を被覆する場合、該クロ
スを該発泡芯体のヘツド上面にあたる部分にあて
がい、しごくことによつて容易にしわがない状態
で該発泡芯体を包むことができる。そして、ソー
ル面に該クロスの端を集めた後に全体を金型内に
配置する。
本発明に用いる型としては、金型製でもよい
し、合成樹脂製でもよい。型内に合成樹脂を注入
するにあたり、キヤビテイ内の空気を真空ポンプ
等で取り除いておくことが好ましい。
型に注入する液状樹脂としては、エポキシ樹
脂、ポリエステル樹脂、ビニルエステル樹脂等が
用いられる。また、注入する液状樹脂は粘度を低
くしておくことが好ましく、型を加熱することに
よつて粘度を下げてもよいし、予め昇温させて粘
度を下げてもよい。又、始めから粘度の低い樹脂
を用いてもよいし、溶剤やモノマーで希釈して粘
度を下げてもよい。型に注入する液状樹脂の圧力
は、高いほうが強化繊維に含浸しやすく、約0.5
〜20Kg／cm2が好ましい。硬化させるには、金型を
加熱して樹脂を硬化させてもよいし、常温で硬化
させてもよい。
Therefore, the inventor arrived at the present invention to solve these problems. That is, in the golf club head of the present invention, a heavy tissue reinforcing fiber cloth is formed by foaming the reinforcing fiber cloth, which is formed by engaging the top and bottom of the core with fibers, on the surface of a reinforced foam core made by foam-molding a mixture of reinforcing fibers in a liquid resin. This is a technical measure that is integrated with the core body. In addition, in the method of manufacturing a golf club head of the present invention, a fiber mass impregnated with a liquid resin is placed in a mold, and the top and bottom are placed on the surface of a so-called fiber-reinforced foam core, which is foamed and hardened by heating and pressurizing. A technical means in which the cloth is covered with a reinforcing fiber cloth made of heavy tissue engaged with fibers and placed in a mold, and the cloth in the mold is injected under pressure and impregnated with a thermosetting resin, and then heated and cured. This study included the following. The head thus obtained has excellent appearance, strength and repulsion characteristics, and because of its shell structure, the head has a wide sweet spot and a large moment of inertia. The fiber-reinforced foam core used in the present invention has a smaller outer shape than that of a golf head, but has a similar shape.
This does not apply if there are design considerations such as placement of the center of gravity. That is, when moving the center of gravity closer to the sole surface, the thickness of the cross layer of reinforcing fibers having heavy tissue on the sole surface is increased, and the cross layer on the opposite upper surface portion is made thinner. In this case, the sole portion of the fiber-reinforced foam core is shaved to give the upper surface of the foam core a swollen shape. In addition, if it is desired to distribute mass between the toe and heel and enlarge the sweet spot, the toe and heel of the fiber-reinforced foam core with high elastic modulus are shaved off to increase the thickness of the cross layer of reinforcing fibers with heavy tissue. The specific gravity of the fiber-reinforced foam core is smaller than the specific gravity of the cross layer of reinforcing fibers having a heavy structure, which increases the degree of freedom in design, and the preferable specific gravity is 1.2 or less. In addition, the elastic modulus of the fiber-reinforced foam core is 200/mm 2
If this is the case, the effects of the present invention will be remarkable.
The modulus of elasticity of conventional foam cores is 100/mm 2 or less. The fibers used in the fiber-reinforced foam core of the present invention include glass fibers, Kevlar fibers, polyamide high modulus fibers, and carbon fibers. Although carbon fiber is the most effective method for reducing the specific gravity and increasing the elastic modulus of the fiber-reinforced foam core, mixing or using other fibers alone is also sufficiently effective.
Furthermore, using a fiber content of about 2 wt% to 60 wt% has a remarkable effect in the present invention. The foaming resin used in the fiber-reinforced foam core of the present invention may be a thermoplastic resin, a thermosetting resin, or a thermosetting resin. Thermoplastic resins include ABS resin, vinyl chloride resin,
Nylon resin, polycarbonate resin, etc. are used. Further, as the thermosetting resin, urethane resin, epoxy resin, polyester resin, etc. are used. Furthermore, the effects of the invention can be sufficiently achieved if the fiber length of the fibers used for reinforcing the fiber-reinforced foam core is 0.1 mm or more. Further, the effect of the present invention is remarkable when the volume of the cell portion of the fiber-reinforced foam core is in the range of 10% to 90%. The method for manufacturing the fiber-reinforced foam core of the present invention includes:
Injection molding may be used, R-RIM method or JP-A-52-
The method shown in Publication No. 49131, that is, the synthetic resin has foaming properties and is initially in a liquid state,
Alternatively, a resin that becomes liquid when heated to high temperature and hardens in a relatively short time is selected, and a fiber mass is impregnated with the liquid synthetic resin and placed in a mold to impregnate the fiber mass. A method is used in which the mold is closed before the synthetic resin has yet foamed, and then the synthetic resin liquid impregnated into the fiber mass is foamed and hardened. Carbon fibers, Kepler fibers, glass fibers, etc. are used as the fibers of the cross layer of reinforcing fibers having a heavy structure provided on the surface of the fiber-reinforced foam core of the present invention, and the fiber forms include roving, woven fabric, braided fiber, etc. A pine shape or the like is used, and these materials and shapes can be used alone or in combination. Sufficient care must be taken when arranging the reinforcing fibers in the fiber-reinforced foam core. In other words, in order to wrap a golf head, in the case of a flat cloth or pine or a cylindrical braided tube, it is necessary to cut a part or overlap it, so it is possible to reduce the cut part and overlap part. , it is preferable to place it in a part where it does not cause problems in terms of strength, repulsion characteristics, appearance, etc. If there are many cut parts or overlapped parts, the strength will decrease. Further, it is preferable to arrange a cut portion or an overlapped portion on the sole surface as a portion that does not cause problems in terms of appearance. In this way, there are as few cut parts as possible,
A reinforcing fiber form with fewer overlapped portions is preferred, and a cloth with a heavy structure that easily deforms is particularly preferred. The cloth having heavy tissue can be used not only for carbon fiber but also for any fiber. Cloths with heavy tissue include double, triple, etc. In addition, a cloth having a heavy structure has a large peel strength because some of the fibers are oriented in the thickness direction, and has a large elastic modulus in the thickness direction, so it has extremely excellent rebound characteristics. Cloth with a heavy structure made of carbon fiber with a coarse weave is particularly susceptible to deformation, and when wrapped around a head-shaped fiber-reinforced foam core, wrinkles and overlapping parts can be reduced, and the cloth has a heavy structure. The carbon fibers can easily wrap the entire surface of the fiber-reinforced foam core. If this is a layer of cloth, if the weave is coarsened so that it is easily deformed, gaps will occur and the surface of the fiber-reinforced foam core cannot be covered with reinforcing fibers. As the binder resin used for the cross layer of reinforcing fibers having a heavy structure according to the present invention, thermosetting resins such as epoxy resins, polyester resins, vinylester resins, and urethane resins are used. In the method of manufacturing a golf club head according to the present invention, the fiber-reinforced foam core of the head is molded in advance in a separate mold. The fiber-reinforced foam core may be machined from a large block, or may be molded into the shape of a golf club. Furthermore, the size of the fiber-reinforced foam core before it is put into a mold is generally smaller than the cavity shape of the mold, but is not necessarily limited. When covering the periphery of the fiber-reinforced foam core with a cloth layer of reinforcing fibers having a heavy structure, apply the cloth to the upper surface of the head of the foam core and squeeze it so that it does not wrinkle easily. The foam core can be wrapped. After gathering the ends of the cloth on the sole surface, the entire cloth is placed in a mold. The mold used in the present invention may be made of a metal mold or of synthetic resin. Before injecting the synthetic resin into the mold, it is preferable to remove the air in the cavity using a vacuum pump or the like. As the liquid resin injected into the mold, epoxy resin, polyester resin, vinyl ester resin, etc. are used. Further, it is preferable that the liquid resin to be injected has a low viscosity, and the viscosity may be lowered by heating the mold or by raising the temperature in advance. Further, a resin having a low viscosity may be used from the beginning, or the viscosity may be lowered by diluting it with a solvent or a monomer. The higher the pressure of the liquid resin injected into the mold, the easier it will be to impregnate the reinforcing fibers.
~20Kg/ cm2 is preferred. For curing, the resin may be cured by heating the mold, or may be cured at room temperature.
本発明の実施例を第１図乃至第３図に基づき以
下に説明する。
第１図は、本発明のゴルフクラブ用ヘツドの一
部断面斜視図である。
繊維強化発泡芯体１の表面には、二重組織を有
するカーボンクロスとエポキシ樹脂とからなる表
面樹脂層２が形成されている。３は、シヤフト用
穴である。繊維強化発泡芯体１としては、カーボ
ン繊維を混入して補強しウレタン発泡体である。
カーボン繊維の長さは10mmであり、カーボン繊維
の含有率は繊維強化発泡芯体１の20wt％を占め
ている。また、繊維強化発泡芯体１の比重は0.6
であり、そして弾性率は800Kg／mm2である。二重
組織を有するカーボンクロスは、米国Textile
Products Inc.製STYLE4930、DEEP DRAW
FABRICを用いた。
第１図のゴルフクラブ用ヘツドは、シヤフトが
取り付けられたり、必要によつてはソールプレー
トが取付けられたり、またバランス用の鉛が挿入
されたりして用いられている。
第２図は、重組織を有する強化繊維クロスの組
繊説明用の断面図である。
上方には、よこ糸４とたて糸５，６とによつて
一枚のクロスが形成されており、また、その下方
には、よこ糸４′とたて糸５′，６′によつて同様
に一枚のクロスが形成されている。この二枚のク
ロスはたて糸６，６′により所々結合されており、
二枚のクロスが重なつたような重組織のクロスが
形成される。尚、第２図のものは、たて糸のみが
結合に用いられているが、よこ糸も所々二枚のク
ロスをたて糸同様に結合させる組織であつてもよ
い。
第３図は、本発明のゴルフクラブ用ヘツドの製
造法を示す断面図である。
ゴルフクラブ用ヘツドの形状を有する金型７，
８内に、金型キヤビテイ形状より小さい繊維強化
発泡芯体９を重組織を有するカーボンクロス１０
を被覆して配置した。金型７，８のパーテイング
面にはシリコンゴム製のパツキングがあり気密性
がある。また、金型７，８上部には液状樹脂を金
型にコンプレツサー１７により圧力をかけて注入
するためのバルブ１５を有するパイプ１２が取り
付けられており、下部には金型７，８内の空気を
真空ポンプ１４により吸引するためのバルブ１３
を有するパイプ１１が取り付けられている。
最初、バルブ１５を閉じた状態にしておき、バ
ルブ１３を開け真空ポンプ１４でキヤビテイ内の
空気を取り除いた。しかるのち、バルブ１３を閉
じ、バルブ１５を開き、予めコンプレツサー１７
で５Kg／cm2に加圧されたエポキシ樹脂をキヤビテ
イ内に注入した。金型は予め120℃に加熱されて
おり、注入した樹脂は約30分で硬化した。硬化す
ると、バルブ１５を閉じ金型７，８を開き、成形
したゴルフクラブヘツドを取り出す。
Embodiments of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a partially sectional perspective view of the golf club head of the present invention. A surface resin layer 2 made of carbon cloth having a double structure and an epoxy resin is formed on the surface of the fiber-reinforced foam core 1. 3 is a shaft hole. The fiber-reinforced foam core 1 is a urethane foam reinforced by mixing carbon fiber.
The length of the carbon fibers is 10 mm, and the content of carbon fibers accounts for 20 wt% of the fiber-reinforced foam core 1. In addition, the specific gravity of the fiber-reinforced foam core 1 is 0.6
and the elastic modulus is 800Kg/ mm2 . Carbon cloth with double structure is manufactured by US Textile
Products Inc. STYLE4930, DEEP DRAW
FABRIC was used. The golf club head shown in FIG. 1 is used with a shaft attached, a sole plate if necessary, and a lead inserted for balance. FIG. 2 is a cross-sectional view for explaining the assembly of a reinforcing fiber cloth having heavy tissue. At the top, a piece of cloth is formed by the weft thread 4 and the warp threads 5 and 6, and below that, a piece of cloth is formed by the weft thread 4' and the warp threads 5' and 6'. A cross is formed. These two pieces of cloth are joined in places by warp threads 6 and 6'.
A heavy tissue cross is formed, which resembles two overlapping sheets of cloth. In the case shown in Fig. 2, only the warp threads are used for binding, but the weft threads may also have a structure that connects two pieces of cloth in some places in the same way as the warp threads. FIG. 3 is a sectional view showing a method of manufacturing a golf club head according to the present invention. a mold 7 having the shape of a golf club head;
8 contains a fiber-reinforced foam core 9 smaller than the mold cavity shape, and a carbon cloth 10 having a heavy structure.
was covered and placed. The parting surfaces of the molds 7 and 8 have silicone rubber packing to ensure airtightness. Further, a pipe 12 having a valve 15 for injecting liquid resin into the mold under pressure by a compressor 17 is attached to the upper part of the molds 7 and 8, and a pipe 12 having a valve 15 for injecting liquid resin into the mold under pressure is attached to the lower part. Valve 13 for suctioning by vacuum pump 14
A pipe 11 having a diameter is attached. Initially, the valve 15 was kept closed, and then the valve 13 was opened and the air inside the cavity was removed using the vacuum pump 14. After that, the valve 13 is closed, the valve 15 is opened, and the compressor 17 is activated in advance.
Epoxy resin pressurized to 5 kg/cm 2 was injected into the cavity. The mold was preheated to 120°C, and the injected resin hardened in about 30 minutes. Once hardened, the valve 15 is closed, the molds 7 and 8 are opened, and the molded golf club head is taken out.
本発明は上記の構成によるもので下記の効果を
奏するものである。
(1) 繊維発泡芯体の表面に上下を繊維によつて係
合させた重組織の強化繊維クロス層を設けたの
で、該クロス層の厚み方向に繊維が配向されて
いるため、剥離強度が大きく且つ厚さ方向の弾
性率が大きくなり、反発特性が著しく優れたゴ
ルフクラブヘツドが得られる。
(2) 上下を繊維によつて係合させた重組織の強化
繊維クロス層を用いて繊維強化発泡芯体を包ん
だ場合、該クロス層の形態が変形しやすいの
で、しわ及び重ね合わせ部分が少なく容易に全
面を包むことができ、強度のある、しかも外観
の良いゴルフクラブヘツドが得られる。
(3) 液状樹脂に強化繊維を混入し発泡形成して、
高い弾性率を有する殻構造の繊維強化発泡芯体
を形成させたので、成形後自在に加工ができて
重組織の強化繊維クロスを自在に積層すること
ができ、したがつてスイートスポツトが広く又
慣性モーメントが大きいゴルフクラブヘツドが
容易に得られる。
The present invention has the above-mentioned configuration and achieves the following effects. (1) Since a reinforced fiber cloth layer of heavy structure is provided on the surface of the fiber foam core, the upper and lower sides are engaged by fibers, the fibers are oriented in the thickness direction of the cloth layer, so the peel strength is increased. A golf club head having a large modulus of elasticity in the thickness direction and extremely excellent repulsion characteristics can be obtained. (2) When a fiber-reinforced foam core is wrapped using a heavy-tissue reinforced fiber cloth layer whose upper and lower sides are engaged by fibers, the shape of the cloth layer is easily deformed, so wrinkles and overlapping portions may be formed. To obtain a golf club head that can be easily wrapped over the entire surface with a small amount of heat, is strong, and has a good appearance. (3) By mixing reinforcing fibers into liquid resin and forming foam,
Since a fiber-reinforced foam core with a shell structure having a high elastic modulus is formed, it can be processed freely after molding, and heavy tissue reinforced fiber cloth can be laminated freely, resulting in a wide sweet spot. A golf club head with a large moment of inertia can be easily obtained.
第１図は本発明のゴルフクラブ用ヘツドの一部
断面斜視図、第２図は重組織を有するクロスの組
織説明用の断面図、第３図は本発明のゴルフクラ
ブ用ヘツドの製造法を示す断面図である。
符号の説明、１……繊維強化発泡芯体、２……
表面樹脂層、３……シヤフト用穴、４，４′……
よこ糸、５，５′……たて糸、６，６′……たて
糸、７……金型、８……金型、９……繊維強化発
泡芯体、１０……重組織を有する強化繊維クロ
ス、１１……パイプ、１２……パイプ、１３……
バルブ、１４……真空ポンプ、１５……バルブ、
１６……エポキシ樹脂、１７……コンプレツサ
ー。
FIG. 1 is a partial cross-sectional perspective view of the head for a golf club of the present invention, FIG. 2 is a cross-sectional view for explaining the structure of a cloth having heavy tissue, and FIG. 3 is a method for manufacturing the head for a golf club of the present invention. FIG. Explanation of symbols, 1...Fiber-reinforced foam core, 2...
Surface resin layer, 3... Shaft hole, 4, 4'...
Weft, 5, 5'... Warp, 6, 6'... Warp, 7... Mold, 8... Mold, 9... Fiber-reinforced foam core, 10... Reinforced fiber cloth having heavy structure, 11...Pipe, 12...Pipe, 13...
Valve, 14...vacuum pump, 15...valve,
16...Epoxy resin, 17...Compressor.
Claims (1)
繊維強化発泡芯体の表面に、上下を繊維によつて
係合させてなる重組織の強化繊維クロス層を該発
泡芯体と一体に設けたことを特徴とするゴルフク
ラブヘツド。 ２ 次の工程からなることを特徴とするゴルフク
ラブヘツドの製造法。 (a) 型内に発泡液状樹脂を含浸させた繊維塊を載
置し液状樹脂が発泡しない前に型を閉じる工
程。 (b) 型を加熱し液状樹脂を発泡、硬化、脱型させ
て繊維強化発泡芯体を形成する工程。 (c) 繊維強化発泡芯体を上下が繊維によつて係合
させてなる重組織の強化繊維クロス層で覆うと
ともに型内に載置し、型を密閉した後型内を真
空にして液状樹脂を加圧注入する工程。 (d) 液状樹脂を加圧注入後、型を加熱し液状樹脂
を硬化させて脱型させる工程。[Scope of Claims] 1. On the surface of a fiber-reinforced foam core formed by foam-molding reinforcing fibers mixed into a liquid resin, a reinforcing fiber cloth layer of a heavy tissue is applied to the surface of the foam core, the upper and lower sides of which are engaged by fibers. A golf club head characterized by being integrated with the body. 2. A method for manufacturing a golf club head, characterized by comprising the following steps. (a) A process in which a fiber mass impregnated with foamed liquid resin is placed in the mold and the mold is closed before the liquid resin foams. (b) A process of heating the mold to foam, harden, and demold the liquid resin to form a fiber-reinforced foam core. (c) The fiber-reinforced foam core is covered with a heavy reinforced fiber cloth layer whose top and bottom are engaged by fibers, placed in a mold, and after the mold is sealed, the inside of the mold is evacuated and liquid resin is applied. The process of injecting under pressure. (d) After injecting the liquid resin under pressure, the mold is heated to harden the liquid resin and removed from the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57209008A JPS59101166A (en) | 1982-11-29 | 1982-11-29 | Golf club head and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57209008A JPS59101166A (en) | 1982-11-29 | 1982-11-29 | Golf club head and production thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59101166A JPS59101166A (en) | 1984-06-11 |
| JPH049062B2 true JPH049062B2 (en) | 1992-02-19 |
Family
ID=16565756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57209008A Granted JPS59101166A (en) | 1982-11-29 | 1982-11-29 | Golf club head and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59101166A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63139572A (en) * | 1986-11-28 | 1988-06-11 | ヤマハ株式会社 | Production of club head for golf |
| JPS6365882A (en) * | 1986-09-08 | 1988-03-24 | ヤマハ株式会社 | Production of golf club set |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS596073A (en) * | 1982-07-05 | 1984-01-13 | ヤマハ株式会社 | Production of wood club head or golf |
| JPS5941448B2 (en) * | 1976-09-28 | 1984-10-06 | 鐘淵化学工業株式会社 | Suspension polymerization method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5941448U (en) * | 1982-09-07 | 1984-03-16 | ヤマハ株式会社 | Wooden club head for golf |
-
1982
- 1982-11-29 JP JP57209008A patent/JPS59101166A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5941448B2 (en) * | 1976-09-28 | 1984-10-06 | 鐘淵化学工業株式会社 | Suspension polymerization method |
| JPS596073A (en) * | 1982-07-05 | 1984-01-13 | ヤマハ株式会社 | Production of wood club head or golf |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59101166A (en) | 1984-06-11 |
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