JPS6161970B2 - - Google Patents
Info
- Publication number
- JPS6161970B2 JPS6161970B2 JP52149734A JP14973477A JPS6161970B2 JP S6161970 B2 JPS6161970 B2 JP S6161970B2 JP 52149734 A JP52149734 A JP 52149734A JP 14973477 A JP14973477 A JP 14973477A JP S6161970 B2 JPS6161970 B2 JP S6161970B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- core metal
- wrapped
- resin
- core
- 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
Links
- 239000002184 metal Substances 0.000 claims description 36
- 229910052751 metal Inorganic materials 0.000 claims description 36
- 229920005989 resin Polymers 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 239000000835 fiber Substances 0.000 description 6
- 229920000049 Carbon (fiber) Polymers 0.000 description 5
- 239000004917 carbon fiber Substances 0.000 description 5
- 239000012783 reinforcing fiber Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000005011 phenolic resin Substances 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920000298 Cellophane Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000956 alloy Chemical group 0.000 description 2
- 229910045601 alloy Chemical group 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229920006337 unsaturated polyester resin Polymers 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 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
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Landscapes
- Fishing Rods (AREA)
- Golf Clubs (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Moulding By Coating Moulds (AREA)
Description
【発明の詳細な説明】
本発明は釣竿、ゴルフクラブシヤフト等に利用
できる中空テーパロツドの製造方法に関し、更に
詳しくは、テーパを有する芯金に巻付けたプリプ
レグシートを曲り変形させることなく硬化させる
ことができる製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a hollow tapered rod that can be used for fishing rods, golf club shafts, etc., and more specifically, a method for curing a prepreg sheet wrapped around a tapered metal core without bending or deforming it. This relates to a manufacturing method that allows for.
従来、ガラス、炭素等の繊維を単独又は併用し
て織布、又は繊維束を一方向に引揃えた引揃シー
トとし、これを単独又は併用して繊維補強シート
を構成し、このシートにエポキシ樹脂、ポリエス
テル、フエノール樹脂の熱硬化性樹脂を含浸せし
めることにより、樹脂が未乾燥したシート、つま
りプリプレグシートを構成し、これを適当な形状
に切断してテーパーを有する鉄又合金製の芯金
（マンドレル）に巻きつけ、その外周にセロハン
テープ、ポリエステルテープ等を螺旋状に巻き締
めた後、使用した樹脂の硬化条件に従い空気加熱
炉中で硬化させ、硬化シートより芯金を引抜き、
シートの表面に巻着されたテープを剥離すること
により、中空テーパロツドを製造していた。 Conventionally, fibers such as glass and carbon are used alone or in combination to make a woven fabric or a aligned sheet in which fiber bundles are aligned in one direction, and these are used alone or in combination to constitute a fiber-reinforced sheet, and this sheet is coated with epoxy. By impregnating a thermosetting resin such as resin, polyester, or phenol resin, a sheet with the resin undried, that is, a prepreg sheet is formed, and this is cut into an appropriate shape to form a tapered iron or alloy core metal. (mandrel), and after wrapping cellophane tape, polyester tape, etc. in a spiral around the outer circumference, it is cured in an air heating oven according to the curing conditions of the resin used, and the core metal is pulled out from the cured sheet.
Hollow tapered rods were produced by peeling off the tape wrapped around the surface of the sheet.
ところが、上述の製造方法においては、硬化が
完了した中空テーパロツドに弓状、蛇行状、螺旋
状の曲りが単独又は複合して発生していた。これ
らの曲りの発生の原因としては次の事項が考えら
れる。 However, in the above-mentioned manufacturing method, bow-shaped, meandering, and spiral bends occur singly or in combination in the hollow tapered rod that has been completely cured. Possible causes of these bends are as follows.
テーパー状の芯金にはプリプレグシートが均
等な層数巻着されることが良いが、量産時にお
いては巻回したシートの終端部が余り、このた
め、部分的に多層化したり、又は前記とは逆に
端部がとどかず部分的に薄層化したりし、シー
トの始端部と終端部をどの部分も完全に一致さ
せることは非常に困難である。従つて補強繊維
の収縮率が場所によつて異なり、弓状、蛇行状
曲りが発生する。 It is best to wrap an equal number of layers of prepreg sheets around the tapered core metal, but during mass production, the ends of the wound sheets will be left over, so it may be partially multi-layered, or as described above. On the other hand, the edges of the sheet do not reach the end and become partially thin, making it extremely difficult to make the starting and ending edges of the sheet completely coincide with each other. Therefore, the shrinkage rate of the reinforcing fibers differs depending on the location, resulting in bow-like or meandering bends.
プリプレグシートの繊維が芯金に螺旋状に捲
回されるため、繊維の収縮が螺旋方向に発生
し、螺旋状曲りが発生する。 Since the fibers of the prepreg sheet are spirally wound around the core metal, contraction of the fibers occurs in the spiral direction, resulting in spiral bending.
プリプレグシートの外周にテープを螺旋状に
捲き締めるため、シートの外層部に螺旋方向の
外力が加わり、螺糸状曲りが発生する。 Since the tape is wound spirally around the outer circumference of the prepreg sheet, an external force in the spiral direction is applied to the outer layer of the sheet, causing a spiral bend.
芯金にプリプレグシートを巻着するには適当
な形状に切断されたシートの始端部を芯金上に
のせておき、その上に加熱されたコテをあてる
ことによつてプリプレグシートの始端部の樹脂
を芯金に固着させ、その後該シートを適当回数
巻着する。この結果、前記の現象はシートの
外層側ほど発生する一方最内層の始端部が芯金
に固着されるので、外層側と内層側における補
強繊維層間の張力の度合や張力の方向等に差異
を生じ、複合曲りが発生する。 To wrap a prepreg sheet around a core metal, place the starting end of the sheet cut into an appropriate shape on the core metal, and apply a heated iron on top of it to wrap the starting end of the prepreg sheet around the core metal. The resin is fixed to the core metal, and then the sheet is wound an appropriate number of times. As a result, the above phenomenon occurs closer to the outer layer of the sheet, while the starting end of the innermost layer is fixed to the core metal, so there is a difference in the degree and direction of tension between the reinforcing fiber layers on the outer and inner layers. and compound bending occurs.
加熱により一時的に樹脂が流動的になつた
時、補強繊維間で自然的均衡作用が生じるが、
外層はテープによつて螺旋方向に引きよせられ
内層は一端が芯金に固定されているので、自然
的均衡作用は、外内層より自由度を有する中間
層に限られ、全体の均衡がとれるまでにはいた
らない。 When the resin temporarily becomes fluid due to heating, a natural equilibrium occurs between the reinforcing fibers.
Since the outer layer is drawn in a spiral direction by tape and the inner layer is fixed at one end to the core metal, the natural balancing action is limited to the middle layer, which has more freedom than the outer and inner layers, until the entire balance is achieved. I don't need it.
補強繊維として炭素繊維を用いた場合、炭素
繊維はガラス繊維に比べて引張り強度が格段に
高いため、曲りは一層大きくなる。 When carbon fibers are used as reinforcing fibers, the bending becomes even greater because carbon fibers have much higher tensile strength than glass fibers.
以上のような原因のため、曲り発生の傾向は複
数の節より構成される継釣竿の穂先又はそれに近
い節などの径の細い場合ほど顕著に生じていた。
特に、炭素繊維の場合、釣竿、ゴルフクラブシヤ
フト用ロツドとして優れた特性を有するが、その
反面製造に際しては前記の曲り発生が一層著し
く、このため量産を困難にしているのみならず、
製品価格を引き上げる結果となつていた。 Due to the above-mentioned causes, the tendency for bending to occur is more pronounced when the diameter of the tip of a fishing rod made up of a plurality of nodes or nodes near it is narrower.
In particular, carbon fiber has excellent properties for rods for fishing rods and golf club shafts, but on the other hand, the above-mentioned bending occurs more significantly during manufacturing, which not only makes mass production difficult.
This resulted in an increase in product prices.
また、芯金の径が細い場合には、巻着シートの
曲りのため芯金が変形されることもあり、芯材の
抜き取りが不可能になるという問題も生じてい
た。 Further, when the diameter of the core metal is small, the core metal may be deformed due to the bending of the wrapped sheet, causing the problem that the core metal cannot be removed.
本発明者は、種々研究を重ねた結果、液状の樹
脂を含浸した樹脂含浸シート（プリプレグ）を芯
金に巻着けてそのままシートを完全硬化させた場
合には、得られた中空テーパロツドの歪や曲り変
形が大きいが、樹脂が半硬化状態（Ｂステージ）
のとき芯金を巻着シートから一旦抜いて芯金と巻
着シートとの接着状態を解除したのち、再び芯金
を巻着シート内に挿入して完全硬化させたときに
は、硬化後の中空テーパロツドから芯金を引き抜
く力は前記方法のときよりも小さくてすみ、また
得られたロツドに歪や変形が生じないことを見出
して本発明を完成した。 As a result of various studies, the present inventor has found that when a resin-impregnated sheet (prepreg) impregnated with liquid resin is wrapped around a core metal and the sheet is completely cured as it is, the resulting hollow taper rod will be less distorted. The bending deformation is large, but the resin is in a semi-cured state (B stage)
When the core bar is removed from the wrapping sheet to release the adhesive state between the core bar and the wrapping sheet, and then the core bar is reinserted into the wrapping sheet and completely cured, the hollow taper rod after hardening is The present invention was completed based on the discovery that the force required to pull out the core bar from the rod is smaller than that required using the above method, and that the resulting rod is free from distortion or deformation.
本発明の目的は中空テーパロツドを曲り変形さ
せることなく量産することができる方法を提供す
ることにある。 An object of the present invention is to provide a method that allows hollow taper rods to be mass-produced without bending or deforming them.
本発明の他の目的は管径が細い中空テーパロツ
ド、例えば釣竿の穂先部に用いるロツドを曲り変
形させることなく量産することができる方法を提
供することにある。 Another object of the present invention is to provide a method for mass producing hollow tapered rods having a small diameter, such as rods used for the tips of fishing rods, without bending or deforming them.
本発明の他の目的は、補強繊維として炭素繊維
を用いる場合であつても、曲り変形させることな
く量産することができる方法を提供することにあ
る。 Another object of the present invention is to provide a method that allows mass production without bending and deforming even when carbon fibers are used as reinforcing fibers.
以下に本発明の実施例を図面に基づいて更に詳
細に説明する。 Embodiments of the present invention will be described in more detail below based on the drawings.
第１図において、１は未硬化状態のシートいわ
ゆるプリプレグシートで、これはガラス繊維、炭
素繊維等の繊維を単独に又は併用して織布又は繊
維束を一方向に引揃えた引揃シートとし、これを
単独又は併用して繊維補強シートとし、これに熱
硬化性合成樹脂液例えばフエノール樹脂、エポキ
シ樹脂又はポリエステル等の樹脂液をそれぞれ単
独で又は混合したものを含浸させてなる。これら
樹脂は常温において未硬化状態にある。このよう
なプリプレグシート１を適当な形状たとえば梯形
に切断し、テーパを有する通常鉄又は合金製の芯
金２に巻付ける。この場合、シート１の始端部３
を加熱されたコテ（図示せず）で芯金２上に押し
つけて芯金２上に固着した後、該シート１を適当
回数巻付ける。第２図はシート１を芯金２に巻き
終つた状態を示す。 In Fig. 1, 1 is an uncured sheet, so-called prepreg sheet, which is an aligned sheet in which woven fabric or fiber bundles are aligned in one direction using fibers such as glass fibers and carbon fibers, either alone or in combination. A fiber-reinforced sheet is made by using these sheets alone or in combination, and impregnated with a thermosetting synthetic resin liquid, such as a resin liquid such as a phenol resin, an epoxy resin, or a polyester, either alone or in combination. These resins are in an uncured state at room temperature. Such a prepreg sheet 1 is cut into a suitable shape, for example, a trapezoid shape, and wound around a tapered core metal 2 usually made of iron or an alloy. In this case, the starting end 3 of the sheet 1
is pressed onto the core metal 2 with a heated iron (not shown) and fixed onto the core metal 2, and then the sheet 1 is wound an appropriate number of times. FIG. 2 shows a state in which the sheet 1 has been wound around the core metal 2.
次に、第３図に示すように、芯金２に巻着した
シート１の外周を張力をかけたテープ４例えばセ
ロハンテープ等で巻き締めるか、又は第４図に示
すように、シート１の外周を熱収縮チユーブ５で
被覆して緊締せしめる。この処理を施こしたもの
を芯金―シート巻着体６と呼ぶ。次に、この芯金
―シート巻着体６を加熱炉（図示せず）に挿入し
て外周が緊締されたシート１すなわち素材を加熱
し、該シート１の樹脂を半硬化処理させる。この
発明において半硬化処理とは、合成樹脂液とし
て、エポキシ樹脂、フエノール樹脂等を使用する
場合にあつては、いわゆるＢステージと言われる
ものをいい、これは80〜140℃前後で60〜30分前
後前記芯金―シート巻着体６を加熱し、含浸樹脂
液を半硬化（セミキユア）した状態にすることで
ある。また不飽和ポリエステル樹脂のように一度
架橋反応が開始されると、架橋反応が終了する迄
その反応が進行する樹脂を使用する場合にあつて
は、その反応過程途中の状態にすることを言う。 Next, as shown in FIG. 3, the outer periphery of the sheet 1 wound around the core bar 2 is wrapped with tensioned tape 4, such as cellophane tape, or as shown in FIG. The outer periphery is covered with a heat shrink tube 5 and tightened. The product subjected to this treatment is called a core metal-sheet wrapped body 6. Next, this core metal-sheet wrapped body 6 is inserted into a heating furnace (not shown) to heat the sheet 1, that is, the material whose outer periphery is tightened, and to semi-cure the resin of the sheet 1. In this invention, the semi-curing process refers to the so-called B stage when epoxy resin, phenol resin, etc. are used as the synthetic resin liquid, and this is the so-called B stage, which is 60 to 30 degrees The method is to heat the core metal-sheet wrapped body 6 for about a minute or so to bring the impregnated resin liquid into a semi-cured state. Furthermore, when using a resin such as an unsaturated polyester resin in which the crosslinking reaction progresses until the crosslinking reaction is completed once it has started, this refers to a state in the middle of the reaction process.
半硬化のステージで、第５図に示すように、芯
金２を巻着シート１から引き抜き、相互の位置を
一度離間し、巻着シート１と芯金２との固着状態
を無くしてから、第６図に示すように再び芯金２
を巻着シートの中に挿入する。この処理を施こし
たものを芯金―巻着シート再嵌合体７と呼ぶ。こ
の芯金―巻着シート再嵌合体７を構成する巻着シ
ート１の合成樹脂液の完全硬化のための処理をす
る。完全硬化の処理はエポキシ樹脂、フエノール
樹脂等の場合は130〜180℃で、60〜120分前後の
再加熱をすることによつて行われ、また不飽和ポ
リエステル樹脂等の場合は架橋反応を引きつづき
続行させることによつて行なわれる。完全硬化
後、巻着シート１から芯金２を引抜き、かくして
得られた中空テーパロツドの外周面を研磨して製
品を得る。 At the semi-curing stage, as shown in FIG. 5, the core bar 2 is pulled out from the wrapping sheet 1, separated once from each other, and the adhesive state between the wrapping sheet 1 and the core bar 2 is eliminated. As shown in Figure 6, the core metal 2
Insert into the wrapping sheet. The product subjected to this treatment is called a core metal-wrapped sheet refitted body 7. A process is performed to completely harden the synthetic resin liquid of the wrapped sheet 1 constituting the core metal-wrapped sheet refitted body 7. For epoxy resins, phenolic resins, etc., complete curing is performed by reheating at 130 to 180°C for approximately 60 to 120 minutes, and for unsaturated polyester resins, the crosslinking reaction is triggered. This is done by continuing. After complete hardening, the core bar 2 is pulled out from the wrapped sheet 1, and the outer peripheral surface of the thus obtained hollow tapered rod is polished to obtain a product.
以上のように本発明の方法は、プリプレグシー
トが半硬化の状態、すなわち、プリプレグシート
がある程度硬化し、該シートより芯金を引抜いて
も該シートは管状の形態を維持するが含浸合成樹
脂は完全に硬化を完了していない状態で、管状の
該シートから芯金をやや少し引き抜いて該シート
と芯金との相対位置をずらすことによつて両者の
接着状態を解除したのち、再び芯金を管状シート
内に挿し込んで完全硬化させる工程を行なうだけ
で、歪や曲り変形のない中空テーパロツドが得ら
れる。 As described above, in the method of the present invention, the prepreg sheet is in a semi-cured state, that is, the prepreg sheet is cured to some extent, and even if the core metal is pulled out from the sheet, the sheet maintains its tubular form, but the impregnated synthetic resin is Before complete curing, the core metal is pulled out from the tubular sheet a little and the relative position between the sheet and the core metal is released to release the bond between them, and then the core metal is removed again. A hollow tapered rod without distortion or bending deformation can be obtained by simply inserting the rod into a tubular sheet and completely curing it.
本発明の方法によつて良好な製品が得られる理
由の詳細については不明であるが、プリプレグの
含浸樹脂を液状の状態から芯金に接触させて完全
硬化させたときは、液状であるため芯金に隙間な
く密着しかつ強く接着するので、芯金の熱膨張と
樹脂の硬化収縮とによる両者の体積変化が生じた
とき、両者が別々に体積変化することができない
ため製品に歪が生じるものと考えられる。これに
対して、一旦引き抜いて再セツトした芯金は半固
体状の樹脂と接するため、芯金への接着が強固と
ならず、そのため管状シート内面と芯金外周面間
に自由度が与えられるので、完全硬化のとき樹脂
が芯金とは別に容易に体積変化できるため製品中
に歪が残らないものと考えられる。本発明方法に
よるときは、シートの収縮等により芯金自体が曲
げられたり、シート内面と芯金外周面とが密着し
て中空ロツドから芯金を抜くことができなくなる
等の不具合を排除することができる。 Although the details of the reason why a good product can be obtained by the method of the present invention are unknown, when the impregnated resin of the prepreg is brought into contact with the core metal from a liquid state and completely cured, since it is in a liquid state, the core metal Because it adheres tightly and strongly to the gold without any gaps, when the volume of both changes due to thermal expansion of the core metal and curing contraction of the resin, the product cannot be distorted because the volume of both cannot change separately. it is conceivable that. On the other hand, since the core bar that has been pulled out and reset is in contact with the semi-solid resin, the adhesion to the core bar is not strong, and therefore a degree of freedom is provided between the inner surface of the tubular sheet and the outer circumferential surface of the core bar. Therefore, it is thought that no distortion remains in the product because the resin can easily change its volume independently of the core metal when completely cured. When using the method of the present invention, it is possible to eliminate problems such as the core bar itself being bent due to shrinkage of the sheet, or the inner surface of the sheet and the outer circumferential surface of the core coming into close contact with each other, making it impossible to remove the core from the hollow rod. I can do it.
第１図は本発明に使用する芯金及び繊維補強樹
脂含浸シートを示す平面図。第２図は芯金に繊維
補強樹脂含浸シートを巻着した状態を示す平面
図。第３図は巻着シートの外周をテープで巻締め
た状態を示す平面図。第４図は巻着シートの外周
を熱収縮チユーブで緊締した状態を示す一部破断
拡大要部斜視図。第５図は半硬化状態の巻着シー
トから芯金を引き抜いた状態を示す軸線方向断面
図。第６図は巻着シートに芯金を再嵌合させる状
態を示す軸線方向断面図である。
１…繊維補強樹脂含浸シート、２…芯金、４…
テープ、５…熱収縮チユーブ、６…芯金―シート
巻着体、７…芯金―巻着シート再嵌合体。
FIG. 1 is a plan view showing a core bar and a fiber-reinforced resin-impregnated sheet used in the present invention. FIG. 2 is a plan view showing a state in which a fiber-reinforced resin-impregnated sheet is wrapped around a core metal. FIG. 3 is a plan view showing a state in which the outer periphery of the wrapped sheet is wrapped with tape. FIG. 4 is a partially cutaway, enlarged perspective view of essential parts showing a state in which the outer periphery of the wrapped sheet is tightened with a heat-shrinkable tube. FIG. 5 is an axial cross-sectional view showing a state in which the core metal is pulled out from the semi-cured wrapped sheet. FIG. 6 is an axial sectional view showing a state in which the core metal is refitted to the wrapped sheet. 1... Fiber-reinforced resin-impregnated sheet, 2... Core bar, 4...
Tape, 5... Heat-shrinkable tube, 6... Core metal-sheet wrapped body, 7... Core metal-wrapped sheet refitted body.
Claims (1)
巻着シートの外周をテープで巻き締めるか、熱収
縮チユーブを被覆して緊締した後、該巻着シート
を硬化処理して巻着シートの樹脂が半硬化状態と
なつたとき、前記巻着シートと芯金とが固着した
状態を、前記シートと芯金との相互の位置をずら
すことによつて無くし、再び芯金を前記巻着シー
ト内に嵌合させ、前記シートが完全硬化するまで
硬化処理を行なうことを特徴とする中空テーパロ
ツドの製造方法。1 Wrap a fiber-reinforced resin-impregnated sheet around a core metal, wrap the outer periphery of the wrapped sheet with tape or cover it with a heat shrink tube and tighten it, and then cure the wrapped sheet to create a wrapped sheet. When the resin is in a semi-hardened state, the state in which the wrapping sheet and the core metal are stuck together is eliminated by shifting the mutual positions of the sheet and the core metal, and the core metal is again wrapped in the core metal. A method for manufacturing a hollow tapered rod, which comprises fitting the hollow tapered rod into a sheet and performing a curing treatment until the sheet is completely hardened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14973477A JPS5481375A (en) | 1977-12-13 | 1977-12-13 | Method of making hollow taper rod and reforming tool for manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14973477A JPS5481375A (en) | 1977-12-13 | 1977-12-13 | Method of making hollow taper rod and reforming tool for manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5481375A JPS5481375A (en) | 1979-06-28 |
| JPS6161970B2 true JPS6161970B2 (en) | 1986-12-27 |
Family
ID=15481637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14973477A Granted JPS5481375A (en) | 1977-12-13 | 1977-12-13 | Method of making hollow taper rod and reforming tool for manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5481375A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59124563U (en) * | 1983-02-09 | 1984-08-22 | 三菱レイヨン株式会社 | golf club shaft |
| JP4955512B2 (en) * | 2007-11-13 | 2012-06-20 | Ｓｒｉスポーツ株式会社 | Golf club shaft |
-
1977
- 1977-12-13 JP JP14973477A patent/JPS5481375A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5481375A (en) | 1979-06-28 |
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