JPH0515533B2 - - Google Patents
Info
- Publication number
- JPH0515533B2 JPH0515533B2 JP4691588A JP4691588A JPH0515533B2 JP H0515533 B2 JPH0515533 B2 JP H0515533B2 JP 4691588 A JP4691588 A JP 4691588A JP 4691588 A JP4691588 A JP 4691588A JP H0515533 B2 JPH0515533 B2 JP H0515533B2
- Authority
- JP
- Japan
- Prior art keywords
- internal pressure
- mold
- thermosetting
- manufacturing
- retaining body
- 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
- 229920005989 resin Polymers 0.000 claims description 20
- 239000011347 resin Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 14
- 239000004745 nonwoven fabric Substances 0.000 claims description 11
- 229920001187 thermosetting polymer Polymers 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 239000012783 reinforcing fiber Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 7
- 229920000049 Carbon (fiber) Polymers 0.000 description 6
- 239000004917 carbon fiber Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001643 poly(ether ketone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000010107 reaction injection moulding Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はテニスラケツトやゴルフクラブのシヤ
フト等パイプ状構造物に有用な軽量のプラスチツ
ク製品の製法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a method for making lightweight plastic products useful for pipe-like structures such as tennis rackets and golf club shafts.
（従来の技術およびその課題）
テニスラケツトやゴルフクラブのシヤフトの様
なプラスチツク製品は通常製品内部を中空にする
ことにより軽量化を達成している。(Prior Art and its Problems) Plastic products such as tennis rackets and golf club shafts are usually made lightweight by making the product hollow.
プラスチツク製品を中空にするために、穴あけ
加工する方法があるが、加工に手間がかかり複雑
な形状のものをつくるのが困難である。また、マ
ンドレルに、熱硬化性樹脂を含浸した強化繊維を
まきつけ、金型内にセツトした後加熱硬化し、次
いでマンドレルを抜く方法もあるが、複雑な形状
の製品に応用することができず直線状のものに限
定される。 There is a method of drilling holes in plastic products to make them hollow, but this process is time-consuming and difficult to make into complex shapes. Another method is to wrap reinforcing fibers impregnated with thermosetting resin around a mandrel, set it in a mold, heat harden it, and then pull out the mandrel, but this method cannot be applied to products with complex shapes, so limited to those in the form of
更に、チユーブを金型にセツトした後、チユー
ブ内にエアー圧をかけ、次いでリム成形用組成物
を注入する方法が提案されている。この方法では
チユーブ内圧とリム成形用組成物の注入圧のバラ
ンスが非常に困難で、偏肉やチユーブのつぶれ、
または破れが生じ易い。 Furthermore, a method has been proposed in which a tube is set in a mold, air pressure is applied inside the tube, and then a rim molding composition is injected. With this method, it is very difficult to balance the internal pressure of the tube and the injection pressure of the rim molding composition, resulting in uneven thickness, tube collapse, and
Or it is easy to tear.
（課題を解決するための手段）
本発明者は上記欠点を克服し、複雑な形状でも
肉厚精度が高いプラスチツク製品の製法を見出し
た。(Means for Solving the Problems) The present inventors have overcome the above-mentioned drawbacks and have discovered a method for producing plastic products with high wall thickness accuracy even in complex shapes.
即ち、本発明は金型内にチユーブ状または袋状
内圧保持体を配置し、該内圧保持体と金型との間
にリム成形用組成物を注入硬化させる中空プラス
チツク製品の製法において、該内圧保持体を予め
熱硬化性または常温硬化性樹脂で被覆し硬化させ
ることを特徴とする中空プラスチツク製品の製法
を提供する。 That is, the present invention provides a method for producing a hollow plastic product in which a tube-shaped or bag-shaped internal pressure retaining body is disposed in a mold, and a rim molding composition is injected and hardened between the internal pressure retaining body and the mold. Provided is a method for producing a hollow plastic product, characterized in that a holder is coated in advance with a thermosetting or room temperature curable resin and cured.
本発明によれば内圧保持体を熱硬化性または常
温硬化性樹脂で被覆後硬化して内圧保持体の形を
固定する。内圧保持体は空気等の注入により金型
の形状に沿う可撓性を有するものであればよく、
ナイロン、セロフアン、ゴム、ポリエステル、ポ
リエーテルケトン等のチユーブ状または袋状のも
のである。 According to the present invention, the shape of the internal pressure holding body is fixed by coating the internal pressure holding body with a thermosetting or room temperature curing resin and then curing the resin. The internal pressure holding body may be any material as long as it has flexibility to conform to the shape of the mold by injecting air, etc.
It is a tube-shaped or bag-shaped material made of nylon, cellophane, rubber, polyester, polyether ketone, etc.
熱硬化または常温硬化性樹脂は種々のタイプも
のが知られており、例えばエポキシ系、ウレタン
系、ポリエステル系、ビニルエステル系のものが
一般的である。これらは通常硬化剤と樹脂の組合
せにより組成物として入手可能である。この種の
組成物の場合、内圧保持体上に塗布等の方法によ
り被覆してもよい。また、この樹脂はプリプレグ
であつてもよい。プリプレグ（prepreg）は補強
剤として連続したガラスまたはカーボン等の繊
維、織布あるいはマツトなどに熱硬化性プラスチ
ツクを硬化剤などと配合したものを含浸させたの
ち、半乾燥状態にして粘着性を失わせたものをい
う。内圧保持体はこのプリプレグを被覆した後、
またはプリプレグに高温の空気を保持体中に導入
して硬化してもよい。また加熱方法としては内圧
をかけた状態で直接金型を加熱してもよい。 Various types of thermosetting or room temperature curable resins are known, and for example, epoxy-based, urethane-based, polyester-based, and vinyl ester-based resins are common. These are usually available as compositions by combining curing agents and resins. In the case of this type of composition, it may be coated onto the internal pressure retaining body by a method such as coating. Further, this resin may be a prepreg. Prepreg is made by impregnating continuous fibers such as glass or carbon, woven fabric, or mat with a mixture of thermosetting plastic and a hardening agent as a reinforcing agent, and then leaving it in a semi-dry state to lose its tackiness. It refers to something that has been adjusted. After the internal pressure holding body is coated with this prepreg,
Alternatively, the prepreg may be cured by introducing hot air into the holder. Further, as a heating method, the mold may be directly heated while applying internal pressure.
リム成形は反応射出成形を意味し、本発明の場
合、内圧保持体を金型内に入れて内圧保持体に高
温の空気を導入して熱硬化性または常温硬化性被
覆を硬化したのち、金型内に反応性モノマーを導
入し、常温または昇温下に反応させて形成する方
法である。リミ成形により得られる樹脂は通常ポ
リウレタン、ポリアミド等いかなる常套のものを
用いてもよい。本発明に好適なリム成形用組成物
は宇部興産社から市販のUBEナイロン（UX−
21）が挙げられる。 Rim molding refers to reaction injection molding, and in the case of the present invention, an internal pressure retaining body is placed in a mold, high temperature air is introduced into the internal pressure retaining body to harden the thermosetting or room temperature hardening coating, and then the metal is molded. This is a method in which a reactive monomer is introduced into a mold and reacted at room temperature or at an elevated temperature. The resin obtained by limit molding may be any conventional resin such as polyurethane or polyamide. The rim molding composition suitable for the present invention is UBE nylon (UX-
21).
本発明では内圧保持体と金型との間に強化繊維
を配置してもよい。強化繊維は通常繊維強化プラ
スチツクに用いられるいかなるものを用いてもよ
い。強化繊維の代表的な例としてはアラミド繊
維、カーボン繊維、ガラス繊維等が挙げられる。
最も好適な強化繊維はカーボン繊維である。繊維
はどのような形態でもよく、編組していてもいな
くてもよい。 In the present invention, reinforcing fibers may be arranged between the internal pressure holding body and the mold. Any reinforcing fibers commonly used in fiber-reinforced plastics may be used. Typical examples of reinforcing fibers include aramid fibers, carbon fibers, glass fibers, and the like.
The most preferred reinforcing fiber is carbon fiber. The fibers may be in any form and may be braided or unbraided.
本発明によれば、製品の外観を良くするために
金型と強化繊維との間に更に不織布層を設けても
よい。使用し得る不織布はガラス繊維ペーパー、
カーボン繊維ペーパー、ポリエステル不織布、ナ
イロン不織布等が挙げられる。この不織布はリム
液の流れが適度なように繊維密度が２〜35Vol
％、好ましくは５〜20Vol％であるものが好適に
用いられる。繊維密度が35Vol％より大きい場合
は樹脂が浸透しにくくなり、外観が不良となる。
また2Vol％より小さい場合は不織布自在が疎に
なりすぎ、カーボン繊維ブレイド層の最外層に不
織布層を設けても下層のブレイド層が直接金型壁
面に密着してしまう個所が生じたり、不織布層リ
ム液が流れる時の抵抗が極端に小さくなり、流れ
抵抗の大きいカーボン繊維ブレイド層より、リム
液は優先的に不織布層に浸透しカーボン繊維ブレ
イド層へ浸透しにくくなる。またこの繊維密度の
範囲であれば織つた布でも良い。 According to the present invention, a nonwoven fabric layer may be further provided between the mold and the reinforcing fibers to improve the appearance of the product. Non-woven fabrics that can be used are glass fiber paper,
Examples include carbon fiber paper, polyester nonwoven fabric, and nylon nonwoven fabric. This non-woven fabric has a fiber density of 2 to 35 Vol to ensure proper flow of rim fluid.
%, preferably 5 to 20 Vol%. If the fiber density is greater than 35 Vol%, it will be difficult for the resin to penetrate and the appearance will be poor.
If it is less than 2Vol%, the flexibility of the nonwoven fabric will be too sparse, and even if a nonwoven fabric layer is provided as the outermost layer of the carbon fiber braid layer, there will be places where the lower braid layer will come into direct contact with the mold wall, or the nonwoven fabric layer will The resistance when the rim liquid flows becomes extremely small, and the rim liquid preferentially penetrates into the nonwoven fabric layer rather than the carbon fiber braid layer, which has higher flow resistance, and becomes difficult to penetrate into the carbon fiber braid layer. Also, woven cloth may be used as long as the fiber density is within this range.
本発明の製法によれば内圧保持体に熱硬化性ま
たは常温硬化性樹脂を塗布する。プリプレグの場
合は内圧保持体上に巻きつけるかまたはプリプレ
グそのものを内圧保持体とする。得られた内圧保
持体は必要により強化繊維、更に不織布を巻きつ
け、型内に置く。内圧保持体中に高温の空気を導
入し、型に合わせると同時に熱硬化性樹脂を硬化
させる。常温硬化型樹脂の場合は上記手順を迅速
に行い常温の空気を導入する。硬化後、常套の方
法によりリム成形用モノマーを内圧保持体と型の
間に導入して成形が実施される。 According to the manufacturing method of the present invention, a thermosetting or room temperature curing resin is applied to the internal pressure holding body. In the case of prepreg, it is wound around an internal pressure holding body or the prepreg itself is used as the internal pressure holding body. The obtained internal pressure-retaining body is wrapped with reinforcing fibers and nonwoven fabric if necessary, and placed in a mold. High temperature air is introduced into the internal pressure holding body to harden the thermosetting resin at the same time as it fits into the mold. In the case of a room-temperature curing resin, the above procedure is quickly carried out and room-temperature air is introduced. After curing, a rim-forming monomer is introduced between the internal pressure holding body and the mold by a conventional method to perform molding.
（発明の効果）
本発明によれば、内圧保持体またはその外側を
予め樹脂硬化させるのでチユーブ内にエアーを充
満した時のように、圧力による変形はおこらず、
偏肉等の欠点は殆ど生じない。また、熱硬化性ま
たは常温硬化樹脂の硬化を、内圧保持体中に高温
の空気を導入することにより実施すれば、金型の
形状によりフイツトして肉厚の精度が向上する。
またチユーブに耐熱性、耐薬品性が要求されな
い。本発明方法は肉厚の精度が大きく要請される
テニスラケツト、ゴルフクラブのシヤフト等のス
ポーツ製品に特に好適である。(Effects of the Invention) According to the present invention, since the internal pressure holding body or the outside thereof is cured with resin in advance, deformation due to pressure does not occur, unlike when the tube is filled with air.
Defects such as uneven thickness hardly occur. Further, if the thermosetting or room temperature curing resin is cured by introducing high temperature air into the internal pressure holding body, the precision of the wall thickness can be improved by fitting the mold shape.
Also, the tube is not required to have heat resistance or chemical resistance. The method of the present invention is particularly suitable for sports products such as tennis rackets and golf club shafts, which require high accuracy in wall thickness.
（実施例）
本発明を実施例により更に詳細に説明する。し
かしながら、本発明はこれら実施例に限定されな
い。(Example) The present invention will be explained in more detail with reference to Examples. However, the present invention is not limited to these examples.
実施例
ナイロン−６製の厚さ80μｍのチユーブに三菱
化成(株)製CF繊維UDプリプレグを巻きつけた。そ
の上にガラス繊維マツトを巻き、さらに東邦レー
ヨン(株)製CF繊維ブレードを巻き金型内にセツト
した。次いでチユーブ内に1.5Kg／cm2の空気圧を
かけ金型130℃で60分間保持してUDプリプレグ
を反応硬化させた。更に金型を150℃に昇温して
宇部興産(株)製MCナイロンUX−21の未反応モノ
マーを樹脂圧1.5Kg／cm2で注入した。Example A CF fiber UD prepreg manufactured by Mitsubishi Kasei Corporation was wound around a nylon-6 tube with a thickness of 80 μm. A glass fiber mat was wound thereon, and a CF fiber braid manufactured by Toho Rayon Co., Ltd. was further set in the winding mold. Next, an air pressure of 1.5 kg/cm 2 was applied inside the tube and the mold was held at 130° C. for 60 minutes to reaction cure the UD prepreg. Furthermore, the temperature of the mold was raised to 150° C., and unreacted monomer of MC nylon UX-21 manufactured by Ube Industries, Ltd. was injected at a resin pressure of 1.5 kg/cm 2 .
チユーブが破れることなく肉厚精度の良い中空
状フレームが成形できた。 A hollow frame with good wall thickness accuracy could be molded without tearing the tube.
Claims (1)
配置し、該内圧保持体と金型との間にリム成形用
組成物を注入硬化させる中空プラスチツク製品の
製法において、該内圧保持体を予め熱硬化性また
は常温硬化性樹脂で被覆し硬化させることを特徴
とする中空プラスチツク製品の製法。 ２ 熱硬化性または常温硬化性樹脂で被覆したも
のがプリプレグである請求項１記載の製法。 ３ 内圧保持体の硬化樹脂層上に強化繊維を配置
し、次いでリム成形用組成物を注入する請求項１
記載の製法。 ４ 強化繊維上に更に不織布を配置する請求項３
記載の製法。 ５ 請求項１〜４いずれかに記載の製法により得
られた中空プラスチツク製品。[Claims] 1. A method for producing a hollow plastic product, in which a tube-shaped or bag-shaped internal pressure retaining body is placed in a mold, and a rim molding composition is injected and hardened between the internal pressure retaining body and the mold, A method for manufacturing a hollow plastic product, characterized in that the internal pressure retaining body is coated in advance with a thermosetting or room temperature curable resin and then cured. 2. The method according to claim 1, wherein the material coated with a thermosetting or room temperature curable resin is a prepreg. 3. Claim 1, wherein the reinforcing fibers are placed on the cured resin layer of the internal pressure retainer, and then the rim molding composition is injected.
Manufacturing method described. 4 Claim 3: A nonwoven fabric is further arranged on the reinforcing fibers.
Manufacturing method described. 5. A hollow plastic product obtained by the manufacturing method according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4691588A JPH01218809A (en) | 1988-02-27 | 1988-02-27 | Manufacture of hollow plastic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4691588A JPH01218809A (en) | 1988-02-27 | 1988-02-27 | Manufacture of hollow plastic product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01218809A JPH01218809A (en) | 1989-09-01 |
| JPH0515533B2 true JPH0515533B2 (en) | 1993-03-01 |
Family
ID=12760640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4691588A Granted JPH01218809A (en) | 1988-02-27 | 1988-02-27 | Manufacture of hollow plastic product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01218809A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0673872B2 (en) * | 1990-03-22 | 1994-09-21 | 住友ゴム業株式会社 | Manufacturing method of fiber reinforced plastic |
| US5156786A (en) * | 1990-07-02 | 1992-10-20 | Hudson Products Corporation | Method for manufacuring fan blades |
| US5169590A (en) * | 1990-11-21 | 1992-12-08 | Automotive Composites Consortium | Resin molding process utilizing a blow molded core |
-
1988
- 1988-02-27 JP JP4691588A patent/JPH01218809A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01218809A (en) | 1989-09-01 |
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