JPH0523405A - Production of golf cluib head - Google Patents

Production of golf cluib head

Info

Publication number
JPH0523405A
JPH0523405A JP3206455A JP20645591A JPH0523405A JP H0523405 A JPH0523405 A JP H0523405A JP 3206455 A JP3206455 A JP 3206455A JP 20645591 A JP20645591 A JP 20645591A JP H0523405 A JPH0523405 A JP H0523405A
Authority
JP
Japan
Prior art keywords
core material
molding
head
injection
injection molding
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.)
Granted
Application number
JP3206455A
Other languages
Japanese (ja)
Other versions
JPH082382B2 (en
Inventor
Yoshihiro Miyazaki
良宏 宮崎
Yoshio Hori
義夫 堀
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.)
SEMII KOGYO KK
TSURUSOU KOGYO KK
Original Assignee
SEMII KOGYO KK
TSURUSOU KOGYO KK
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 SEMII KOGYO KK, TSURUSOU KOGYO KK filed Critical SEMII KOGYO KK
Priority to JP3206455A priority Critical patent/JPH082382B2/en
Priority to TW081109662A priority patent/TW205020B/zh
Publication of JPH0523405A publication Critical patent/JPH0523405A/en
Publication of JPH082382B2 publication Critical patent/JPH082382B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To provide the method which is entirely different from a method using a lightweight core material consisting of a foam and which produces the golf club head made of a synthetic resin generally known as a big head. CONSTITUTION:A prototype obtd. by molding a compsn.consisting essentially of urea and polyvinyl alcohol is used as a core material 1. The synthetic resin is injected around this core material 1 as an insert, by which an injection molding 2 is formed. The core material 1 is eluted from the injection molding 2 by spraying hot water to the resulted molding.

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、合成樹脂製のゴルフク
ラブヘッドを製造する方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a golf club head made of synthetic resin.

【0002】[0002]

【従来の技術】ゴルフクラブのうちウッド、スプーン、
バッフィー、クリーク等のヘッドは、もともとはパーシ
モンなどのウッドで作られていたが、最近ではメタル製
や合成樹脂製のものも普及している。
2. Description of the Related Art Of golf clubs, wood, spoon,
Buffy and creek heads were originally made of wood such as persimmon, but recently, those made of metal or synthetic resin have become popular.

【0003】殊に最近では、合成樹脂製ヘッドとして、
軽量芯材をインサートとし、その周囲に射出成形により
本体を設けたものが注目を浴びている。このヘッドは、
本体内部が軽量であるので、ヘッド全体を大きくするこ
とができるからである。
Particularly recently, as a synthetic resin head,
Attention has been focused on a lightweight core material that is used as an insert and a main body is provided around the insert by injection molding. This head is
This is because the inside of the main body is lightweight and the entire head can be enlarged.

【0004】この種のヘッドにおいては、軽量芯材とし
て、ポリウレタン、ABS樹脂、ポリカーボネート、ナ
イロン、耐衝撃性ポリスチレン等の樹脂の発泡体ないし
スポンジ体が使用されている。この場合、芯材をできる
だけ軽量化してヘッド全体を大きくすることができるよ
うに、発泡成形時の条件を工夫して、得られる発泡体の
中心部に空洞を形成させたり、発泡体をくり抜いて内部
に空洞を設けることもなされている。なお本体の材質と
しては、各種の熱可塑性樹脂または熱硬化性樹脂に炭素
繊維等の補強繊維を混入したものが使用されている。
In this type of head, a foam or sponge made of a resin such as polyurethane, ABS resin, polycarbonate, nylon, or high impact polystyrene is used as a lightweight core material. In this case, in order to make the core material as lightweight as possible and to make the entire head larger, the conditions during foam molding were devised to form a cavity in the center of the resulting foam or to hollow out the foam. It is also possible to provide a cavity inside. As the material of the main body, various thermoplastic resins or thermosetting resins mixed with reinforcing fibers such as carbon fibers are used.

【0005】[0005]

【発明が解決しようとする課題】軽量芯材として均一な
発泡体を用いることは、本体形成のための射出成形時の
圧力に耐えなければならないので、芯材の軽量化には限
界がある。本体側も薄肉化や均肉化に限界があり、その
結果ヘッド全体を大きくすることにもおのずから限界が
生ずる。
The use of a uniform foam as a lightweight core material has a limit in reducing the weight of the core material because it must withstand the pressure during injection molding for forming the main body. The body side also has a limit in thinning and uniforming the thickness, and as a result, there is a limit in enlarging the entire head.

【0006】発泡体の成形時に中心部に空洞を形成させ
る方法は、軽量芯材をさらに軽量化することができる
が、発泡成形時のわずかな条件の違いにより、空洞形成
位置に偏りを生じたり、空洞の形状が一定にならないこ
とが多く、その結果スイートスポットがクラブにより一
定しないことがある。発泡体をくり抜いて内部に空洞を
設ける方法は、手作業によるため、品質が一定しなかっ
たり、コスト高になったりする不利がある。またこれら
いずれの方法においても、本質的には発泡体を軽量芯材
として用いることによる上述のような問題点(薄肉化や
均肉化の限界)を有する。
The method of forming a cavity in the center of a foam body can further reduce the weight of the lightweight core material, but due to a slight difference in the conditions during foam molding, the cavity formation position may be biased. Often, the shape of the cavities is not constant, and as a result, the sweet spot may not be constant depending on the club. The method of hollowing out the foam and providing the cavity inside has the disadvantages that the quality is not constant and the cost is high because it is a manual work. Also, in any of these methods, there is essentially the above-mentioned problem (limitation of thinning or uniformization) due to the use of a foam as a lightweight core material.

【0007】本発明は、このような状況に鑑み、発泡体
からなる軽量芯材を用いる方法とは全く異なる方法で、
デカヘッドと通称される合成樹脂製のゴルフクラブヘッ
ドを製造する方法を提供することを目的とするものであ
る。
In view of such a situation, the present invention is a method completely different from the method using a lightweight core material made of foam,
It is an object of the present invention to provide a method for manufacturing a golf club head made of synthetic resin, which is commonly called a decahead.

【0008】[0008]

【課題を解決するための手段】本発明のゴルフクラブヘ
ッドの製造法は、尿素および水溶性高分子を主剤とする
組成物を成形して得た原型を芯材(1) として用い、該芯
材(1) をインサートとしてその周囲に合成樹脂を射出す
ることにより射出成形本体(2) を製造し、ついで前記芯
材(1) を水により溶出することを特徴とするものであ
る。
The method for manufacturing a golf club head of the present invention uses a prototype obtained by molding a composition containing urea and a water-soluble polymer as a main component as a core material (1). The material is characterized in that the material (1) is used as an insert and a synthetic resin is injected around the material to manufacture an injection-molded body (2), and then the core material (1) is eluted with water.

【0009】以下本発明を詳細に説明する。The present invention will be described in detail below.

【0010】本発明においては、尿素および水溶性高分
子を主剤とする組成物を成形して得た原型を芯材(1) と
して用いる。水溶性高分子の代表例はポリビニルアルコ
ールである。芯材(1) は次のようにして作製することが
できる。
In the present invention, a prototype obtained by molding a composition containing urea and a water-soluble polymer as a main component is used as the core material (1). A typical example of the water-soluble polymer is polyvinyl alcohol. The core material (1) can be manufactured as follows.

【0011】すなわち、尿素および水溶性高分子の粉末
ないし顆粒を混合し、加熱すると尿素が融解するので、
撹拌を行うとその融解した尿素に水溶性高分子が溶解し
ていく。この際水を添加することもできる。ついでこれ
を冷却し、適当な粒度に粉砕する。あるいは、尿素の水
溶液と水溶性高分子の水溶液とを均一に混合してから、
水分率が2重量%程度以下になるまで乾燥し、粉砕す
る。このようにして得られた粉体を圧縮成形、射出成形
等の手段により成形して芯材(1)となすが、この際成形
収縮をほとんど生じないという特徴がある。成形条件と
しては、たとえば、温度90〜125℃、圧力200kg
/cm2程度以上の条件が採用される。
That is, when urea and a water-soluble polymer powder or granules are mixed and heated, the urea melts.
Upon stirring, the water-soluble polymer dissolves in the melted urea. At this time, water may be added. It is then cooled and ground to a suitable particle size. Alternatively, after uniformly mixing the aqueous solution of urea and the aqueous solution of the water-soluble polymer,
It is dried and pulverized until the water content becomes about 2% by weight or less. The powder thus obtained is molded by a means such as compression molding or injection molding to form the core material (1), which is characterized in that molding shrinkage hardly occurs at this time. As molding conditions, for example, a temperature of 90 to 125 ° C. and a pressure of 200 kg
A condition of about / cm 2 or more is adopted.

【0012】上記の軽量芯材(1) をインサートとして用
い、その周囲に合成樹脂を射出して成形を行うと、射出
成形本体(2) が形成される。この目的の合成樹脂として
は、ABS樹脂、ポリカーボネート、ナイロン、ポリエ
ーテルエーテルケトンをはじめとする成形用樹脂(熱可
塑性樹脂を用いることが多いが、熱硬化性樹脂を用いる
こともある。)が用いられ、2種以上の樹脂をブレンド
してポリマーアロイとして用いることもできる。この際
には、成形用樹脂に炭素繊維、芳香族アミド繊維、ボロ
ン繊維、ガラス繊維、チタン繊維、ウイスカーなどの補
強用の短繊維を適当量混入しておくことが望ましく、そ
のほか各種のフィラー、着色剤、安定剤、可塑剤、その
他の添加剤を適宜配合することもできる。
When the above lightweight core material (1) is used as an insert and a synthetic resin is injected around the insert to perform molding, an injection molding body (2) is formed. As the synthetic resin for this purpose, a molding resin such as ABS resin, polycarbonate, nylon, or polyether ether ketone (a thermoplastic resin is often used, but a thermosetting resin may be used) is used. It is also possible to blend two or more kinds of resins and use them as a polymer alloy. At this time, it is desirable to mix an appropriate amount of reinforcing fibers such as carbon fibers, aromatic amide fibers, boron fibers, glass fibers, titanium fibers, and whiskers in the molding resin, and other various fillers, Coloring agents, stabilizers, plasticizers, and other additives may be added as appropriate.

【0013】得られた射出成形物は、射出成形本体(2)
の中空部に芯材(1) が内包した構成を有する。芯材(1)
は常温ないし加温した水により容易に溶出するので、射
出成形本体(2) の中空部から芯材(1) を除去することが
できる。
The obtained injection-molded product has an injection-molded body (2).
It has a configuration in which the core material (1) is included in the hollow part of the. Core material (1)
Can be easily eluted by water heated to room temperature or heated, so that the core material (1) can be removed from the hollow portion of the injection-molded body (2).

【0014】このようにして得たヘッドの中空部には、
もし必要なら軽量の充填物を充填することができる。一
例をあげると、ポリウレタンを吹き込んで中空部内にお
いて高発泡させることができる。
In the hollow portion of the head thus obtained,
If desired, a lightweight filling can be filled. As an example, polyurethane can be blown into the hollow portion for high foaming.

【0015】ヘッドには、必要に応じて研磨や塗装を施
し、さらには必要なパーツおよびシャフトを取り付けて
クラブとする。
The head is polished or painted as necessary, and necessary parts and shafts are attached to form a club.

【0016】本発明のゴルクラブヘッドは、ウッド、ス
プーン、バッフィー、クリークなどのヘッドとして用い
ることができる。
The golf club head of the present invention can be used as a head for wood, spoon, buffy, creek and the like.

【0017】[0017]

【作用】本発明の方法は、尿素および水溶性高分子を主
剤とする組成物を成形して得た原型を一時的に芯材(1)
として用いるものであるが、該芯材(1) は従来の発泡体
製の軽量芯材とは異なり固くしっかりとしている上、芯
材(1) の成形に際し成形収縮をほとんど起こさないの
で、その芯材(1) をインサートとする射出成形本体(2)
の射出を高圧で行うことができる。そのため、射出成形
本体(2) の薄肉化が可能となり、その分だけ中空部の容
積を大きくすることができる。また射出成形本体(2) に
自由に均肉をとることができ、ヘッドのデザインの自由
度が従来に比し格段に大きくなる。
In the method of the present invention, a prototype obtained by molding a composition containing urea and a water-soluble polymer as a main component is temporarily used as a core material (1).
The core material (1) is hard and firm unlike the conventional lightweight core material made of foam, and it does not cause molding shrinkage during molding of the core material (1). Injection molded body (2) with material (1) as insert
Can be injected at high pressure. Therefore, the injection-molded body (2) can be made thinner, and the volume of the hollow portion can be increased accordingly. In addition, the injection-molded body (2) can be made to have a uniform thickness, and the degree of freedom in designing the head is significantly greater than in the past.

【0018】加えて、芯材(1) の製造および射出成形本
体(2)形成後の芯材(1) の溶出も容易であり、製造工程
が複雑となることもない。
In addition, it is easy to manufacture the core material (1) and to elute the core material (1) after forming the injection-molded body (2), and the manufacturing process is not complicated.

【0019】[0019]

【実施例】次に実施例をあげて本発明をさらに説明す
る。以下「部」とあるのは重量部である。
EXAMPLES The present invention will be further described with reference to examples. Hereinafter, “parts” means parts by weight.

【0020】実施例1 図1は本発明の製造法を模式的に示した説明図である。Example 1 FIG. 1 is an explanatory view schematically showing the manufacturing method of the present invention.

【0021】尿素粉末90部とポリビニルアルコール粉
末5部を混合し、135℃にまで昇温したところ尿素が
融解したので、この温度を保ちながら撹拌を行い、融解
尿素中にポリビニルアルコールを溶解させた。これを放
冷して固化させ、ついで粉砕機で粉砕した。得られた粉
体を射出成形機に供給して、温度120℃、射出圧20
0〜300kg/cm2、金型温度20〜80℃、成形サイク
ル150秒の条件で射出成形を行い、固定用金型コアピ
ン(3) 付きの芯材(1) を得た。この状態が図1の(イ)
である。
90 parts of urea powder and 5 parts of polyvinyl alcohol powder were mixed and heated to 135 ° C. When urea was melted, stirring was performed while maintaining this temperature to dissolve polyvinyl alcohol in the molten urea. .. This was left to cool and solidify, and then pulverized with a pulverizer. The obtained powder is supplied to an injection molding machine and the temperature is 120 ° C. and the injection pressure is 20.
Injection molding was carried out under conditions of 0 to 300 kg / cm 2 , mold temperature of 20 to 80 ° C. and molding cycle of 150 seconds to obtain a core material (1) with a mold core pin (3) for fixation. This state is shown in (a) of Figure 1.
Is.

【0022】次に、この固定用金型コアピン(3) 付きの
芯材(1) を射出成形機にインサートとしてセットし、炭
素繊維製の短繊維を混入したABS樹脂を射出成形機に
供給して、樹脂温230℃、射出圧700kg/cm2、金型
温度40℃、成形サイクル80秒の条件で射出成形を行
い、射出成形本体(2) を形成させた。この状態が図1の
(ロ)である。
Next, the core material (1) with the fixing die core pin (3) was set as an insert in an injection molding machine, and ABS resin mixed with carbon fiber short fibers was supplied to the injection molding machine. Then, injection molding was performed under the conditions of a resin temperature of 230 ° C., an injection pressure of 700 kg / cm 2 , a mold temperature of 40 ° C., and a molding cycle of 80 seconds to form an injection molding body (2). This state is shown in FIG.

【0023】上記で得た成形物の芯材(1) 部分に温水を
吹き付けたところ、図1(ハ)のように芯材(1) は射出
成形本体(2) から容易に溶出したので、芯材(1) 除去後
の射出成形本体(2) に塗装を施した。
When hot water was sprayed onto the core material (1) portion of the molded product obtained above, the core material (1) was easily eluted from the injection molding body (2) as shown in FIG. After the core material (1) was removed, the injection-molded body (2) was painted.

【0024】このようにして得られたヘッドは、従来の
デカヘッドと通称される射出成形ヘッド(内部に空洞を
有するABS樹脂製発泡芯材を用い、本体を炭素繊維混
入ABS樹脂で形成したもの)よりも、同じ重量で1回
り大きいものであった。このヘッドに必要なパーツおよ
びシャフトを取り付けて製品クラブとした。なお、射出
成形本体(2) の中空部にたとえばポリウレタンを吹き込
んで発泡させることもできる。
The head thus obtained is an injection-molding head commonly called a conventional deca-head (the body is made of a carbon fiber-mixed ABS resin using an ABS resin foam core material having a cavity inside). It was one size larger than the same weight. The necessary parts and shaft were attached to this head to make a product club. Incidentally, polyurethane may be blown into the hollow portion of the injection-molded body (2) to foam it.

【0025】[0025]

【発明の効果】本発明の方法によれば、射出成形本体
(2) の薄肉化および均肉化が可能となるため、従来のヘ
ッドに比し大きさを一段と大きくすることができ、また
ヘッドのデザインの自由度が大きくなる。
According to the method of the present invention, the injection molded body
Since it is possible to reduce the thickness and make the thickness uniform in (2), the size can be further increased as compared with the conventional head, and the degree of freedom in the design of the head is increased.

【0026】加えて、製造工程が複雑になることがない
こと、常に一定品質のヘッドを製造することができるの
で、スイートスポットが製品によりずれるようなおそれ
がないことなどの利点もある。
In addition, there are advantages that the manufacturing process does not become complicated and that a head of constant quality can be manufactured at all times, so that the sweet spot does not shift depending on the product.

【0027】よって本発明の方法により製造されるゴル
フクラブヘッドは、性能の点でもデザイン・外観の点で
も、時代の要求に沿うことができる。
Therefore, the golf club head manufactured by the method of the present invention can meet the requirements of the times in terms of performance and design / appearance.

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

【図1】本発明の製造法を模式的に示した説明図であ
る。
FIG. 1 is an explanatory view schematically showing a production method of the present invention.

【符号の説明】[Explanation of symbols]

(1) …芯材、 (2) …射出成形本体、 (3) …固定用金型コアピン (1)… Core material, (2)… Injection molding body, (3)… Fixing mold core pin

Claims (1)

【特許請求の範囲】 【請求項1】尿素および水溶性高分子を主剤とする組成
物を成形して得た原型を芯材(1) として用い、該芯材
(1) をインサートとしてその周囲に合成樹脂を射出する
ことにより射出成形本体(2) を製造し、ついで前記芯材
(1) を水により溶出することを特徴とするゴルフクラブ
ヘッドの製造法。
Claims: 1. A prototype obtained by molding a composition containing urea and a water-soluble polymer as a main component is used as a core material (1).
The injection molding body (2) is manufactured by injecting synthetic resin around the (1) as an insert, and then the core material
A method for manufacturing a golf club head, wherein (1) is eluted with water.
JP3206455A 1991-07-22 1991-07-22 Golf club head manufacturing method Expired - Lifetime JPH082382B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3206455A JPH082382B2 (en) 1991-07-22 1991-07-22 Golf club head manufacturing method
TW081109662A TW205020B (en) 1991-07-22 1992-12-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3206455A JPH082382B2 (en) 1991-07-22 1991-07-22 Golf club head manufacturing method

Publications (2)

Publication Number Publication Date
JPH0523405A true JPH0523405A (en) 1993-02-02
JPH082382B2 JPH082382B2 (en) 1996-01-17

Family

ID=16523665

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3206455A Expired - Lifetime JPH082382B2 (en) 1991-07-22 1991-07-22 Golf club head manufacturing method

Country Status (2)

Country Link
JP (1) JPH082382B2 (en)
TW (1) TW205020B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08215351A (en) * 1995-02-03 1996-08-27 Ind Technol Res Inst Preparation of integrally precision cast metal golf club head
JP2008507324A (en) * 2004-07-22 2008-03-13 デューハースト ソルーション, エルエルシー Golf club head
JP2013248088A (en) * 2012-05-31 2013-12-12 Dunlop Sports Co Ltd Method for manufacturing golf club head

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5116222A (en) * 1974-07-31 1976-02-09 Hitachi Ltd Igatano seisakuho
JPS6365882A (en) * 1986-09-08 1988-03-24 ヤマハ株式会社 Production of golf club set

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5116222A (en) * 1974-07-31 1976-02-09 Hitachi Ltd Igatano seisakuho
JPS6365882A (en) * 1986-09-08 1988-03-24 ヤマハ株式会社 Production of golf club set

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08215351A (en) * 1995-02-03 1996-08-27 Ind Technol Res Inst Preparation of integrally precision cast metal golf club head
JP2008507324A (en) * 2004-07-22 2008-03-13 デューハースト ソルーション, エルエルシー Golf club head
JP2013248088A (en) * 2012-05-31 2013-12-12 Dunlop Sports Co Ltd Method for manufacturing golf club head

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JPH082382B2 (en) 1996-01-17
TW205020B (en) 1993-05-01

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