JPH06327797A - Golf club head - Google Patents

Golf club head

Info

Publication number
JPH06327797A
JPH06327797A JP5139879A JP13987993A JPH06327797A JP H06327797 A JPH06327797 A JP H06327797A JP 5139879 A JP5139879 A JP 5139879A JP 13987993 A JP13987993 A JP 13987993A JP H06327797 A JPH06327797 A JP H06327797A
Authority
JP
Japan
Prior art keywords
core material
resin
golf club
club head
golf
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.)
Pending
Application number
JP5139879A
Other languages
Japanese (ja)
Inventor
Takashi Murata
多加志 村田
Yuji Kazahaya
祐二 風早
Katsumi Anai
勝美 穴井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Rayon Co Ltd
Original Assignee
Mitsubishi Rayon Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Rayon Co Ltd filed Critical Mitsubishi Rayon Co Ltd
Priority to JP5139879A priority Critical patent/JPH06327797A/en
Publication of JPH06327797A publication Critical patent/JPH06327797A/en
Pending legal-status Critical Current

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  • Golf Clubs (AREA)

Abstract

PURPOSE:To lower the density of a core material and to improve the adhesiveness between a shell and core by using a molding formed by mixing a bis- maleimide or polyimide resin and micro hollow spherical bodies consisting of glass or resin and subjecting the mixture to curing by heating as the core material. CONSTITUTION:The molding formed by mixture the bis-maleimide or polyimide resin and the micro hollow spherical bodies consisting of glass or thermosetting resin and thermoplastic resin and subjecting the mixture to curing by heating is used as the core material 2 of the core body of the golf club head mainly consisting of carbon fiber reinforced plastic 1. By using the bis-maleimide or polyimide resins which is highly heat resistant and highly elastic materials as the core material of the golf head, the golf ball head has a possibility for lowering the density and molding stability. The degree of freedom in designing the golf club is thus additionally widened and the formation of the golf club head having higher performance is made possible.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ゴルフクラブのヘッド
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head.

【0002】[0002]

【従来の技術】ゴルフクラブのウッドヘッドは、一般に
パーシモンが主として用いられているが、近年、材料開
発の著しい進歩による設計自由度の拡大により、繊維強
化プラスチックを用いたゴルフクラブヘッドの開発が盛
んに行われている。
2. Description of the Related Art Persimmon is generally mainly used for the wood head of a golf club, but in recent years, the development of the degree of freedom in design has been expanded by the remarkable progress of material development, and the development of a golf club head using a fiber reinforced plastic has been popular. Has been done in.

【0003】繊維強化プラスチックを用いたクラブヘッ
ドのコア材としては硬質ウレタンフォーム等の樹脂発泡
材が多く用いられているが、これらの樹脂発泡材は成形
性が容易であり低密度化が可能な反面、コア材として最
も重要な特性である圧縮強度が低いという欠点がある。
このためゴルフヘッド成形時にコア材が潰れ外殻を形成
している繊維強化プラスチック層にクラックや変形が生
じ、目的とする機能及び外観を達成することが困難であ
った。また、低圧にて成形を行うと外殻に十分な圧力が
加わらないためボイドの発生、外観不良等の問題が生ず
る。
A resin foam material such as a rigid urethane foam is often used as a core material of a club head using a fiber reinforced plastic, but these resin foam materials are easy to mold and can be reduced in density. On the other hand, it has a drawback that the compressive strength, which is the most important property as a core material, is low.
Therefore, during molding of the golf head, the core material is crushed and cracks or deformations occur in the fiber reinforced plastic layer forming the outer shell, making it difficult to achieve the desired function and appearance. Further, when the molding is carried out at a low pressure, sufficient pressure is not applied to the outer shell, which causes problems such as generation of voids and poor appearance.

【0004】最近では、低融点合金と硬質ウレタンフォ
ームの併用や置子の利用によるゴルフヘッドの成形がな
されているが、低融点合金と硬質ウレタンフォームの併
用タイプは、成形後に低融点合金を除去するため成形温
度以上の高温にヘッド材が晒され熱劣化を生じたり、ま
た合金を完全に除去することが困難なため、注入された
硬質ウレタンフォームと外殻との接着性に支障をきたし
一体感を損なうことによる飛距離の低下や打球時の不快
感を与える。また、ウレタンフォーム併用は工程も増え
作業性、コストの面においても悪影響を及ぼしている。
又、置子タイプについても作業性が悪いことに加え、成
形後に取り出せる置子のサイズに限界があるためゴルフ
ヘッドの設計可能範囲がせばめられる。
Recently, a golf head has been molded by using a low melting point alloy and a hard urethane foam in combination or by using a locator. In the combination type of a low melting point alloy and a hard urethane foam, the low melting point alloy is removed after molding. As a result, the head material is exposed to a temperature higher than the molding temperature to cause thermal deterioration, and it is difficult to completely remove the alloy, which causes a problem in the adhesion between the injected hard urethane foam and the outer shell. It gives a feeling of discomfort at the time of hitting and a reduction in the flight distance due to the loss of the feeling. In addition, the combined use of urethane foam also has an adverse effect on the workability and cost in terms of additional steps.
Further, in addition to the poor workability of the placement element type, there is a limit to the size of the placement element that can be taken out after molding, so the designable range of the golf head is limited.

【0005】以上の問題点を改善するため、エポキシ樹
脂のような非発泡性の熱硬化性樹脂にガラスの微小中空
球を分散させ加熱硬化して成るコア材が開示(特公平5
−2339号公報)されている。しかしながら該樹脂に
おいてはコア材が一定以上の圧縮強度を保持するために
は最小可能密度が0.45程度であり、これ以下にする
と耐熱性が低いため高温における圧縮強度が低下する。
また、高温における熱膨張が大きいため成形後にコア材
と外殻の界面にクラックが生じ易く、やはり満足のゆく
ゴルフヘッド材を得るには問題がある。さらに、上述の
不具合を改善するためコア材の中へガラス繊維または炭
素繊維やその織物を混入する手法を試みられているが、
密度の上昇は避けられない。
In order to improve the above-mentioned problems, a core material disclosed in which glass micro hollow spheres are dispersed in a non-foaming thermosetting resin such as an epoxy resin and heat-cured is disclosed (Patent Publication 5).
No. 2339). However, in this resin, the minimum possible density is about 0.45 in order for the core material to maintain a certain level of compressive strength, and if it is less than this, the heat resistance is low and the compressive strength at high temperature decreases.
Further, since the thermal expansion at high temperature is large, cracks are likely to occur at the interface between the core material and the outer shell after molding, which is also problematic in obtaining a satisfactory golf head material. Furthermore, in order to improve the above-mentioned inconvenience, a method of mixing glass fiber or carbon fiber or its woven fabric into the core material has been attempted,
Increasing density is unavoidable.

【0006】[0006]

【発明が解決しようとする課題】本発明の目的とすると
ころは、繊維強化プラスチックのゴルフヘッド特に炭素
繊維強化プラスチックから成るゴルフヘッドにおいて、
そのコア材のマトリクス樹脂について選択検討すること
により低密度化、外殻との接着性向上及び作業性の改善
をなし得る高性能なゴルフクラブを提供することにあ
る。
SUMMARY OF THE INVENTION It is an object of the present invention to provide a golf head of fiber reinforced plastic, especially a golf head made of carbon fiber reinforced plastic.
It is intended to provide a high-performance golf club capable of lowering the density, improving the adhesion to the outer shell, and improving the workability by selectively examining the matrix resin of the core material.

【0007】[0007]

【課題を解決するための手段】本発明は、主に炭素繊維
強化プラスチックから成るゴルフクラブヘッドにおい
て、芯体のコア材としてビスマレイミドまたはポリイミ
ド樹脂とガラスまたは熱硬化性樹脂,熱可塑性樹脂から
なる微小中空球体を混合し、加熱硬化した成形体を用い
たゴルフクラブヘッドにある。
SUMMARY OF THE INVENTION The present invention is a golf club head mainly made of carbon fiber reinforced plastic, which comprises bismaleimide or polyimide resin and glass or thermosetting resin or thermoplastic resin as the core material of the core. It is a golf club head using a molded body obtained by mixing minute hollow spheres and curing them by heating.

【0008】次に、本発明のゴルフクラブヘッドを図面
に基づいて説明する。図1はウッドクラブヘッド本体で
あり、図2は図1A−A位置の断面図である。図2にお
いて、2はコア材を表わしており外殻である炭素繊維強
化プラスチック1により覆われている。これをソールプ
レート3を装着することによりクラブヘッドが構成され
る。
Next, the golf club head of the present invention will be described with reference to the drawings. FIG. 1 is a main body of a wood club head, and FIG. 2 is a sectional view taken along the line AA in FIG. 1A. In FIG. 2, reference numeral 2 denotes a core material, which is covered with a carbon fiber reinforced plastic 1 which is an outer shell. A club head is constructed by attaching this to the sole plate 3.

【0009】本発明においてコア材に用いるマトリクス
樹脂としては、ビスマレイミド樹脂又はポリイミド樹脂
である。これらの樹脂は単独で又はNBR,酢酸ビニル
樹脂,エポキシ樹脂等と併用してもよい。
The matrix resin used as the core material in the present invention is a bismaleimide resin or a polyimide resin. These resins may be used alone or in combination with NBR, vinyl acetate resin, epoxy resin and the like.

【0010】ビスマレイミド樹脂又はポリイミド樹脂と
共にコア材2を構成する微小中空球の材料は特に限定さ
れないが、ガラス,樹脂が用いられるが、ガラスがより
好ましい。ガラス微小中空球は単独で用いても他の微小
中空球,発泡材,空気等と併用してもよい。コア材の調
製方法は特に限定されるものではなく、例えば双腕ニー
ダーに樹脂を投入し、つづいてガラス微小中空球を加え
常圧下で混合しても良い。
The material of the micro hollow spheres that form the core material 2 together with the bismaleimide resin or the polyimide resin is not particularly limited, but glass or resin is used, but glass is more preferable. The glass micro hollow spheres may be used alone or in combination with other micro hollow spheres, foam materials, air, and the like. The method for preparing the core material is not particularly limited, and for example, the resin may be charged into a double-arm kneader, and then glass micro hollow spheres may be added and mixed under normal pressure.

【0011】[0011]

【実施例】【Example】

実施例1 70℃に設定された1L双腕ニーダーへビスマレイミド
BT−2160(三菱瓦斯化学(株)製、商品名)11
4gとパークミルD0.228g加え、次いでガラス微
小中空球としてグラスバブルズB38/6000(米国
3M社製、商品名)351g加え常圧下で約30分間混
練りした後取り出した。この混合物を所定の形状に固め
200℃×2時間乾燥機中で硬化させた後取り出した。
アルキメデス法により密度を測定したところ0.39g
/cm3 であった。
Example 1 1 L dual-arm kneader hessaleimide BT-2160 (trade name, manufactured by Mitsubishi Gas Chemical Co., Inc.) set at 70 ° C. 11
4 g and 0.228 g of Park Mill D were added, and then 351 g of Glass Bubbles B38 / 6000 (manufactured by 3M Company, USA) as glass micro hollow spheres were added, and the mixture was kneaded under normal pressure for about 30 minutes and then taken out. This mixture was hardened into a predetermined shape, cured at 200 ° C. for 2 hours in a dryer, and then taken out.
When the density was measured by the Archimedes method, it was 0.39 g.
/ Cm 3 .

【0012】次にベルトサンダーで形状出しを行った
後、ビニルエステル樹脂をマトリクスとした炭素繊維の
ランダム材とクロス材を組み合わせ、50トンプレスを
用い公知の方法によりウッドクラブヘッドに成形を行っ
た。得られたゴルフヘッドの外観はクラック、ボイド等
はなく良好であった。また、中心部を切断し断面を観察
したところ芯体と外殻との接着性も良好であった。
Next, after shaping with a belt sander, a random material of carbon fibers having a vinyl ester resin matrix and a cloth material were combined and molded into a wood club head by a known method using a 50 ton press. . The appearance of the obtained golf head was good with no cracks or voids. Further, when the central portion was cut and the cross section was observed, the adhesiveness between the core body and the outer shell was good.

【0013】実施例2 実施例1のグラスバブルズにS−60(米国3M社製、
商品名)を用いた他は、実施例1と同様にゴルフヘッド
を成形した。コア材の密度は0.50であった。
Example 2 The glass bubbles of Example 1 were added with S-60 (manufactured by 3M Co., USA,
A golf head was molded in the same manner as in Example 1 except that (trade name) was used. The density of the core material was 0.50.

【0014】比較例1 コア材として公知の手法により硬質ウレタンフォームを
成形し以下実施例1と同様にしてゴルフヘッドを成形し
た。得られたゴルフヘッドの外観はコア材が潰れ、外殻
材に大きなクラックが発生していた。
Comparative Example 1 A hard urethane foam was molded as a core material by a known method, and a golf head was molded in the same manner as in Example 1 below. Regarding the appearance of the obtained golf head, the core material was crushed and large cracks were generated in the outer shell material.

【0015】比較例2 コア材のマトリックスにエポキシ樹脂のエピコート82
8(油化シェル社製、商品名)109.3gと触媒とし
てBF3 モノエチルアミン5.7gを用いた他は実施例
1と同様にしてゴルフヘッドを成形した。
Comparative Example 2 Epicoat 82 of epoxy resin is used as the matrix of the core material.
A golf head was molded in the same manner as in Example 1 except that 109.3 g of 8 (trade name, manufactured by Yuka Shell Co., Ltd.) and 5.7 g of BF 3 monoethylamine were used as a catalyst.

【0016】比較例3 比較例2のグラスバブルズにS−60を用いた他は、比
較例2と同様にしてゴルフヘッドを成形した。コア材の
密度は0.50であった。実施例,比較例で得たクラブ
ヘッドの性能結果を表1に示す。
Comparative Example 3 A golf head was molded in the same manner as in Comparative Example 2 except that S-60 was used as the glass bubbles of Comparative Example 2. The density of the core material was 0.50. Table 1 shows performance results of the club heads obtained in Examples and Comparative Examples.

【0017】[0017]

【表1】 [Table 1]

【0018】[0018]

【発明の効果】以上本発明は高耐熱、高弾性材料である
ビスマレイミドやポリイミド樹脂をゴルフヘッドのコア
材に用いたことにより、低密度化の可能性と成形安定性
を有しており、ゴルフクラブの設計自由度の一層の拡大
と、高性能化を可能にした。
As described above, the present invention has the possibility of lowering the density and the molding stability by using bismaleimide or polyimide resin, which is a highly heat resistant and highly elastic material, as the core material of the golf head. This has made it possible to further expand the degree of freedom in designing golf clubs and improve performance.

【図面の簡単な説明】[Brief description of drawings]

【図1】ウッドヘッドの外観図である。FIG. 1 is an external view of a wood head.

【図2】図1のA−A線の断面図である。FIG. 2 is a cross-sectional view taken along the line AA of FIG.

【符号の説明】[Explanation of symbols]

1 炭素繊維強化プラスチック 2 コア材 3 ソールプレート 1 Carbon fiber reinforced plastic 2 Core material 3 Sole plate

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 主に炭素繊維強化プラスチックから成る
ゴルフクラブヘッドにおいて、芯体のコア材としてビス
マレイミドまたはポリイミド樹脂とガラスまたは熱硬化
性樹脂,熱可塑性樹脂からなる微小中空球体を混合し、
加熱硬化した成形体を用いることを特徴とするゴルフク
ラブヘッド。
1. A golf club head mainly composed of carbon fiber reinforced plastic, wherein bismaleimide or polyimide resin is mixed as a core material of a core with glass or thermosetting resin, or minute hollow spheres made of thermoplastic resin,
A golf club head using a heat-cured molded body.
JP5139879A 1993-05-20 1993-05-20 Golf club head Pending JPH06327797A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5139879A JPH06327797A (en) 1993-05-20 1993-05-20 Golf club head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5139879A JPH06327797A (en) 1993-05-20 1993-05-20 Golf club head

Publications (1)

Publication Number Publication Date
JPH06327797A true JPH06327797A (en) 1994-11-29

Family

ID=15255702

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5139879A Pending JPH06327797A (en) 1993-05-20 1993-05-20 Golf club head

Country Status (1)

Country Link
JP (1) JPH06327797A (en)

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