JP3214892B2 - Method for producing hollow cross-section shaped body - Google Patents
Method for producing hollow cross-section shaped bodyInfo
- Publication number
- JP3214892B2 JP3214892B2 JP12771092A JP12771092A JP3214892B2 JP 3214892 B2 JP3214892 B2 JP 3214892B2 JP 12771092 A JP12771092 A JP 12771092A JP 12771092 A JP12771092 A JP 12771092A JP 3214892 B2 JP3214892 B2 JP 3214892B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- molded body
- sheet
- mold
- thermoplastic 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 - Fee Related
Links
Landscapes
- Laminated Bodies (AREA)
- Moulding By Coating Moulds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、繊維複合体からなる芯
材層と熱可塑性樹脂からなる被覆層とを有する横断面中
空異形成形体の製造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 process for producing a hollow cross-sectionally formed article having a core layer made of a fiber composite and a coating layer made of a thermoplastic resin.
【０００２】[0002]
【従来の技術】従来、塩化ビニル樹脂等の熱可塑性樹脂
を材料とし、異形押出成形方法により成形された軒樋や
窓枠等の横断面異形成形体は、広く知られている。しか
し、このような熱可塑性樹脂のみを材料としたものは、
熱伸縮率が大きく剛性にも劣るので、最近では、例えば
雨樋の場合、不織布、織布、多数のガラスロービング等
の強化繊維に、液状の熱硬化性樹脂や合成樹脂系もしく
はゴム系の液状接着剤を含浸させてなる材料を用いて繊
維複合体からなる芯材層を成形し、次いで、その両面ま
たは内外何れかの片面に熱可塑性樹脂を被覆する方法が
提案されている（特開昭５９−８９１４８号公報参
照）。2. Description of the Related Art Conventionally, there are widely known cross-sectionally formed shapes such as eaves gutters and window frames which are formed from a thermoplastic resin such as a vinyl chloride resin by a profile extrusion method. However, those made of only such a thermoplastic resin,
In recent years, for example, in the case of rain gutters, reinforced fibers such as nonwoven fabrics, woven fabrics, and many glass rovings have been added to liquid thermosetting resins, synthetic resin-based or rubber-based A method has been proposed in which a core layer made of a fiber composite is formed using a material impregnated with an adhesive, and then a thermoplastic resin is coated on both surfaces or on either one of the inner and outer surfaces (Japanese Patent Application Laid-Open (JP-A) No. Sho. 59-89148).
【０００３】[0003]
【本発明が解決しようとする課題】ところで、上記従来
技術における繊維強化合成樹脂製の横断面異形成形体
は、一旦、芯材を軒樋状、或いは窓枠状等に賦形した
後、これを押出機のクロスヘッド金型に導入して、芯材
の例えば両面に熱可塑性樹脂を押出被覆するという方法
で製造されるのである。しかしながら、このような軒樋
等の製造方法においては、次のような幾つかの問題点が
ある。Incidentally, in the above-mentioned conventional cross-section formed of fiber-reinforced synthetic resin in the prior art, the core material is once formed into an eaves gutter shape or a window frame shape and then formed. Is introduced into a crosshead mold of an extruder, and a thermoplastic resin is extrusion-coated on, for example, both sides of a core material. However, such a method for manufacturing an eaves gutter has the following problems.
【０００４】第一には所望形状に押出被覆するための異
形ダイの設計が難しい。というのは、金型はバラス効果
のためトライアンドエラーで調節する必要がある。ま
た、第二には当然のことながら一種類の成形体に対して
一つの異形ダイが必要である。また、第三には繊維強化
合成樹脂からなる芯材は、金属のような良好な賦形性が
なく、曲げ加工をした場合に各コーナー部のＲがどうし
ても大きくなってしまうのである。First, it is difficult to design a profiled die for extrusion coating to a desired shape. This is because the mold needs to be adjusted by trial and error due to the ballistic effect. Secondly, one shaped die is required for one type of molded product. Thirdly, a core material made of a fiber-reinforced synthetic resin does not have good shaping properties like metal, and the R at each corner is inevitably increased when bending is performed.
【０００５】本発明は、上述のような従来技術における
問題点を解消し、芯材に熱可塑性樹脂が被覆され、熱伸
縮や剛性が改善された繊維強化合成樹脂製の横断面異形
成形体を、一つの異形ダイで複数種類の製品形状のもの
を成形することができ、しかも芯材に樹脂を積層した段
階では、コーナー部のＲが大きくても、製品形状でのコ
ーナー部の形状は、湾曲状にも或いは鋭角にも自由に成
形できる方法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, and provides a cross-sectional profile formed of a fiber-reinforced synthetic resin having a core material coated with a thermoplastic resin and having improved thermal expansion and contraction and rigidity. However, a plurality of types of product shapes can be molded with one deformed die, and at the stage where the resin is laminated on the core material, even if the R of the corner portion is large, the shape of the corner portion in the product shape is as follows: It is an object of the present invention to provide a method that can be freely formed into a curved shape or an acute angle.
【０００６】[0006]
【課題を解決する為の手段】本発明は、「異形横断面を
有する内金型の外周面に、シート状繊維複合体を連続的
に移送しつつ、該内金型を包含した形でシート状繊維複
合体からなる横断面中空異形成形体を形成する工程と、
該成形体の内面もしくは外面に熱可塑性樹脂を押し出し
て積層し２層以上の多層成形体とする工程と、該多層成
形体を異形横断面を有する外金型に導入するとともに、
多層成形体の該中空内に加圧気体を送入してその外面を
規制しつつ賦形する工程と、該賦形された多層成形体を
冷却する工程とを有することを特徴とする横断面中空異
形成形体の製造方法」をその要旨とするものである。Means for Solving the Problems The present invention relates to a method for producing a sheet containing the inner mold while continuously transferring the sheet-like fiber composite to the outer peripheral surface of the inner mold having an irregular cross section. Forming a cross-sectional hollow heteromorphic shaped body comprising a fibrous composite,
A step of extruding and laminating a thermoplastic resin on the inner surface or outer surface of the molded body to form a multilayer molded body of two or more layers, and introducing the multilayer molded body into an outer mold having an irregular cross section;
A cross section comprising: a step of feeding a pressurized gas into the hollow of the multilayer molded body to shape the outer surface thereof while regulating the outer surface; and a step of cooling the shaped multilayer molded body. The main point is "a method for producing a hollow deformed shaped body".
【０００７】本発明において用いるシート状繊維複合体
は、強化繊維のフィラメント間に、熱可塑性樹脂が保持
され、加熱・加圧等によりシート状にされたものであ
り、強化繊維としては、熱可塑性樹脂の強化用として用
いられる従来公知のものが全て用いられる。The sheet-like fiber composite used in the present invention is a sheet-like fiber formed by holding a thermoplastic resin between filaments of a reinforcing fiber and applying heat and pressure to the sheet. All conventionally known materials used for reinforcing resins are used.
【０００８】具体的には、ガラス繊維、炭素繊維、シリ
コン・チタン・炭素繊維、ボロン繊維、微細な金属繊維
等の無機繊維、アラミド繊維、ビニロン繊維、液晶ポリ
マー繊維、ポリエステル繊維、ポリアミド繊維等の有機
繊維が挙げられる。More specifically, inorganic fibers such as glass fiber, carbon fiber, silicon / titanium / carbon fiber, boron fiber, fine metal fiber, aramid fiber, vinylon fiber, liquid crystal polymer fiber, polyester fiber, polyamide fiber, etc. Organic fibers.
【０００９】そして、これらの強化繊維から繊維複合体
を得る場合、主として、直径が１〜数十μｍの連続した
繊維よりなるロービング状またはストランド状のものが
好適に用いられる。[0009] When a fiber composite is obtained from these reinforcing fibers, a roving- or strand-like one composed mainly of continuous fibers having a diameter of 1 to several tens of µm is preferably used.
【００１０】また、強化繊維はそのフィラメントの一本
一本の間に熱可塑性樹脂が充分に含浸し、保持した状態
のものが好ましく、このような連続繊維で補強されてい
ることが強化繊維と、熱可塑性樹脂との接着性を高める
点、或いは、熱伸縮の低下、剛性の改善を行う上で好ま
しく、強化繊維と樹脂との接着性を高めるために、予
め、フィラメント間に熱可塑性樹脂が含浸される等の表
面処理が施されたものが好ましい。The reinforcing fibers are preferably in a state in which the thermoplastic resin is sufficiently impregnated and held between each filament, and it is preferable that the reinforcing fibers are reinforced with such continuous fibers. In order to enhance the adhesiveness with the thermoplastic resin, or to reduce the thermal expansion and contraction, and to improve the rigidity, in order to enhance the adhesiveness between the reinforcing fiber and the resin, a thermoplastic resin is previously placed between the filaments. Those subjected to surface treatment such as impregnation are preferable.
【００１１】また、強化繊維はそれぞれが別の方向に配
置された有限長の繊維からなる不織布、或いは、サーフ
ェイスマットを加えて構成してもよいが、幅方向に均一
な拡幅応力を与えられたときに、これを阻害する材質の
ものを使用したり、或いは幅方向に伸長性の乏しい繊維
を高密度に配設することはできるだけ避けた方が好まし
く、逆に、拡幅を必要としない長手方向に、繊維の方向
が配列したような強化繊維を用いるのが好ましい。The reinforcing fibers may be constituted by adding a nonwoven fabric made of fibers of finite length arranged in different directions or a surface mat, but a uniform widening stress is applied in the width direction. Sometimes, it is preferable to avoid using a material that hinders this, or to arrange fibers with poor stretchability in the width direction at high density as much as possible. In addition, it is preferable to use reinforcing fibers in which the directions of the fibers are arranged.
【００１２】本発明において、上記の強化繊維に保持さ
れる合成樹脂としては、熱可塑性樹脂が用いられ熱硬化
性樹脂は採用しない。その理由は、外面に被覆される熱
可塑性樹脂との融着性を確固たるものとする為である。In the present invention, a thermoplastic resin is used as the synthetic resin held by the reinforcing fibers, and a thermosetting resin is not used. The reason for this is to secure the fusion property with the thermoplastic resin coated on the outer surface.
【００１３】そして、その熱可塑性樹脂としては、例え
ば、ポリ塩化ビニル、塩素化ポリ塩化ビニル、ポリエチ
レン、ポリプロピレン、ポリスチレン、ポリアミド、ポ
リカーボネート、ポリフェニレンサルファイド、ポリス
ルホン、ポリエーテルエーテルケトン等であり、これら
の熱可塑性樹脂は、単独で或いは複数の混合物として用
いられてもよい。また、必要に応じて熱安定剤、可塑
剤、滑剤、酸化防止剤、紫外線吸収剤、顔料、無機充填
材、強化繊維等の添加剤、充填剤、加工助剤、改質剤等
が混合できる。[0013] Examples of the thermoplastic resin include polyvinyl chloride, chlorinated polyvinyl chloride, polyethylene, polypropylene, polystyrene, polyamide, polycarbonate, polyphenylene sulfide, polysulfone, and polyether ether ketone. The plastic resins may be used alone or as a mixture of a plurality. If necessary, additives such as heat stabilizers, plasticizers, lubricants, antioxidants, ultraviolet absorbers, pigments, inorganic fillers, reinforcing fibers, fillers, processing aids, modifiers, etc. can be mixed. .
【００１４】シート状繊維複合体の厚みは、所望する強
化層の厚みにより決められるが、通常は０．０５〜１ｍ
ｍ程度のものが好適に用いられる。また、この繊維複合
体中の繊維量は、５〜７０容量％が好ましい。その理由
は、５容量％未満では充分な補強効果が発現されず、７
０容量％を超えると、外層或いは内層の熱可塑性樹脂と
の融着性が低下して充分な界面接着強度が得られにくい
からである。[0014] The thickness of the sheet-like fiber composite is determined by the desired thickness of the reinforcing layer, and is usually 0.05 to 1 m.
Those having a size of about m are preferably used. The amount of fibers in the fiber composite is preferably 5 to 70% by volume. The reason is that if it is less than 5% by volume, a sufficient reinforcing effect is not exhibited, and
If the content exceeds 0% by volume, the adhesiveness of the outer layer or the inner layer to the thermoplastic resin is reduced, and it is difficult to obtain a sufficient interfacial adhesive strength.
【００１５】本発明において、中空異形成形体の外層或
いは内層に用いる熱可塑性樹脂は、強化繊維に保持され
る熱可塑性樹脂と必ずしも同一である必要はなく、中空
状に押し出し成形可能なものであり、強化繊維に保持さ
れている樹脂との融着性に富むもの、伸び特性の良いも
のであれば、特に限定されず、製品の使用目的に適した
熱可塑性樹脂を使用すればよい。また、熱可塑性樹脂
は、中空異形成形体の主として外層に用いられるが、内
層に用いてもよく、また内外の両面に積層してもよく、
何れにしても押出被覆成形方法を用いて行う。In the present invention, the thermoplastic resin used for the outer layer or the inner layer of the hollow deformed body does not necessarily have to be the same as the thermoplastic resin held by the reinforcing fibers, and can be extruded into a hollow shape. The material is not particularly limited as long as it has a high degree of fusion with the resin held by the reinforcing fibers and has good elongation characteristics, and a thermoplastic resin suitable for the intended use of the product may be used. Further, the thermoplastic resin is used mainly for the outer layer of the hollow deformed shaped body, but may be used for the inner layer, or may be laminated on both the inner and outer surfaces,
In any case, it is carried out using an extrusion coating molding method.
【００１６】尚、ここで述べる融着性とは、双方の樹脂
を溶融状態になるまで加熱した上で圧着し、冷却後、融
着した界面が容易に破断しないことをいう。また、伸び
特性が良いとは、樹脂の軟化温度以上において、２００
％以上延伸されても、破断しないことをいう。The term "fusibility" as used herein means that both resins are heated until they are in a molten state, then pressed, and after cooling, the fused interface is not easily broken. Further, that the elongation property is good means that the elongation property is 200 °
% Does not break even when stretched.
【００１７】強化繊維のフイラメント間に熱可塑性樹脂
を含浸させて熱可塑性樹脂を保持させる方法は、多数の
フィラメントより構成されるロービング状もしくはスト
ランド状、或いは筒状織物等の連続繊維材を用いて、
．粉体状熱可塑性樹脂の流動床中を通過させる方法、
．粉体状熱可塑性樹脂を分散した液体の槽中を通過さ
せ、粉体状熱可塑性樹脂をフィラメント間に含浸させ、
続いて溶融温度以上に加熱して繊維と樹脂を一体化せし
めるか、または、含浸させた後一旦乾燥させ、溶融温度
以上に加熱して繊維と樹脂を一体化せしめ、シート状、
テープ状に成形する方法が好適に採用される。また、溶
融粘度が低い樹脂の場合には、上記連続繊維材を溶融樹
脂の槽中に浸漬する方法で含浸させることも可能であ
る。A method of impregnating a thermoplastic resin between filaments of a reinforcing fiber to hold the thermoplastic resin is performed by using a continuous fiber material such as a roving or strand shape composed of a large number of filaments, or a tubular fabric. ,
. A method of passing a powdery thermoplastic resin through a fluidized bed,
. The powdered thermoplastic resin is passed through a liquid tank in which it is dispersed, and the powdered thermoplastic resin is impregnated between the filaments,
Subsequently, the fiber and the resin are integrated by heating at a temperature higher than the melting temperature, or once dried after impregnation, and the fiber and the resin are integrated by heating at a temperature equal to or higher than the melting temperature.
A method of molding into a tape shape is suitably employed. Further, in the case of a resin having a low melt viscosity, it is possible to impregnate the continuous fiber material by dipping the resin into a bath of the molten resin.
【００１８】[0018]
【作用】本発明は、異形横断面を有する内金型の外周面
に、シート状繊維複合体を連続的に移送しつつ、該内金
型を包含した形でシート状繊維複合体からなる横断面中
空異形成形体を形成する工程と、該成形体の外面もしく
は内面に熱可塑性樹脂を押し出して積層し多層成形体と
する工程と、該多層化成形の段階で中空内部に加圧気体
を導入し、異形断面を有する外金型で外面を規制しつつ
成形する工程とを有するので、横断面中空異形成形体に
樹脂を積層した段階では、コーナー部のＲが大きくて
も、製品形状でのコーナー部のＲ形状は、湾曲状にも或
いは鋭角にも自由に成形できる。According to the present invention, there is provided a cross-section comprising a sheet-shaped fiber composite in a form including the inner die while continuously transferring the sheet-shaped fiber composite to an outer peripheral surface of an inner die having a deformed cross section. A step of forming a planar hollow deformed shaped body, a step of extruding and laminating a thermoplastic resin on the outer surface or inner surface of the molded body to form a multilayer molded body, and introducing a pressurized gas into the hollow at the stage of the multilayer molding. And a step of molding while regulating the outer surface with an outer mold having an irregular cross-section. The R shape of the corner portion can be freely formed into a curved shape or an acute angle.
【００１９】[0019]
【実施例】以下、実施例について図面を参照しながら詳
細に説明する。請求項１記載の発明の一実施例を、図面
に基づいて詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments will be described in detail with reference to the drawings. An embodiment of the present invention will be described in detail with reference to the drawings.
【００２０】図１及び図２は、請求項１記載の発明の製
造方法の実施に用いる装置の一例を示す図であって、角
樋を成形する装置である。図１はその全体を示す概略正
面図であり、図２は、その最初の工程部分（図１では左
側の部分）を示す斜視図である。FIGS. 1 and 2 are views showing an example of an apparatus used for carrying out the manufacturing method according to the first aspect of the present invention, which is an apparatus for forming a square gutter. FIG. 1 is a schematic front view showing the whole, and FIG. 2 is a perspective view showing the first process part (the left part in FIG. 1).
【００２１】１、１′はシート状繊維複合体２、２′が
巻回されているボビンであり、成形方向の上下に配置さ
れている。３、３及び４、４はガイドロールであって、
同時に巻き戻されるシート状繊維複合体１、１′の両縁
を順次上側に折り曲げる為のものである。Reference numerals 1 and 1 'denote bobbins around which the sheet-like fiber composites 2 and 2' are wound, and are disposed above and below in the molding direction. 3, 3 and 4, 4 are guide rolls,
This is for sequentially bending both edges of the sheet-like fiber composites 1 and 1 'which are simultaneously rewound upward.
【００２２】５は角樋の成形に適したほぼコの字状の異
形横断面を有する内金型であって、後述する外金型まで
延設されている。なお、図２での内金型５は説明の便宜
上実際よりも厚肉状に描いている。Reference numeral 5 denotes an inner mold having a substantially U-shaped irregular cross section suitable for forming a square gutter, and extends to an outer mold described later. Note that the inner mold 5 in FIG. 2 is drawn thicker than it actually is for convenience of explanation.
【００２３】２枚のシート状繊維複合体２、２′は、そ
の上側の１枚２は内金型５の内側の壁面に沿って移送さ
れ、また下側の１枚２′は内金型５の外側の壁面に沿っ
て移送される。The two sheet-like fiber composites 2 and 2 'are transported along the inner wall surface of the inner mold 5 with the upper one 2 and the lower one 2' with the inner mold 2 '. 5 along the outer wall.
【００２４】６、６・・は内金型５のコーナー部の内外
に僅かの隙間を隔てて配設されたガイド板であり、シー
ト状繊維複合体２、２′は、ガイド板６と内金型５の壁
面との間を進行するのであって、前述のガイドロール３
及び４と共に、２枚のシート状繊維複合体２、２′を上
述のように内金型５の内外壁面に沿って円滑に移送でき
るようにガイドする為のものである。Reference numerals 6, 6... Denote guide plates disposed inside and outside the corners of the inner mold 5 with a slight gap therebetween, and the sheet-like fiber composites 2, 2 ' The guide roll 3 travels between the mold 5 and the wall surface.
Together with (4) and (4), they guide the two sheet-like fiber composites 2 and 2 'so that they can be smoothly transported along the inner and outer wall surfaces of the inner mold 5 as described above.
【００２５】７、７は、内金型５の一端から加圧気体を
送り込む為の気体導入管であり、図示しないコンプレッ
サー等の加圧気体供給源に連結されている。８は２枚の
シート状繊維複合体１、１′の端縁同士を重ね合わせて
熱融着させるための加熱押圧ロールであって、内金型５
の両方の上端縁との間で、シート状繊維複合体２、２′
の端縁同士を押圧して融着できるようになっている。Reference numerals 7 and 7 denote gas introduction pipes for feeding a pressurized gas from one end of the inner mold 5, and are connected to a pressurized gas supply source such as a compressor (not shown). Reference numeral 8 denotes a heating press roll for overlapping and thermally fusing the edges of the two sheet-like fiber composites 1 and 1 '.
Between both upper edges of the sheet-like fiber composite 2, 2 '
Are pressed against each other to be fused.
【００２６】図３は、図１において、この気体導入管７
から後述する冷却金型迄の間を拡大し、且つ一部切欠し
て示す図である。９は押出機、１０は押出機９の先端
に、ダイアダプタ１１を介して付設されたクロスヘッド
型の環状の押出金型であり、図３に示すように環状のマ
ニホールド１２の先端には、先に行くに従って薄くなさ
れたダイリップが設けられている。FIG. 3 shows the gas introduction pipe 7 in FIG.
FIG. 3 is an enlarged view of a part from a part to a cooling mold described later, and is partially cut away. 9 is an extruder, 10 is a cross-head type annular extrusion die attached to the tip of the extruder 9 via a die adapter 11, and as shown in FIG. A die lip is provided which is made thinner as going ahead.
【００２７】前述の内金型５は、この押出金型１０の先
端近くまで配設され、一方、前述の気体導入管７から
は、多数の通気孔１３がこの内コア５内に貫設され、先
端面に開口している。The above-mentioned inner die 5 is disposed close to the tip of the extrusion die 10, while a large number of ventilation holes 13 pass through the inner core 5 from the above-mentioned gas introduction pipe 7. , And is open at the tip end surface.
【００２８】１４は、押出金型１０に連設された賦形金
型であって、その上部の型面１５は、成形方向に漸次拡
径され、後述する樋の耳部を所望の形に成形できるよう
に形成されている。Numeral 14 denotes a shaping die connected to the extrusion die 10, and the upper die surface 15 is gradually expanded in the forming direction, so that the gutter ears described later have a desired shape. It is formed so that it can be molded.
【００２９】１６は断熱材層、１７は冷却金型、１８は
引取機、１９、１９・・は、内金型５の先端面から成形
方向に突設された多数本の支承材であって、これによっ
て、後述する２層成形体の中空内部をシールする為の、
例えばシリコンゴム製のシール材２０を支承する。16 is a heat insulating material layer, 17 is a cooling mold, 18 is a take-off machine, 19, 19... Are a large number of support materials protruding from the front end face of the inner mold 5 in the forming direction. Thereby, for sealing the hollow interior of the two-layer molded body described later,
For example, a sealing material 20 made of silicon rubber is supported.
【００３０】尚、本実施例で用いるシート状繊維複合体
２の製造方法について、図５にもとずいて以下に述べ
る。同図において、２１は流動床装置であって、この槽
底内には多孔板２２が設けられ、気体供給路から送られ
てきた空気或いは窒素等の気体Ｇが多孔板２２の下方か
ら多孔板の孔を通って上方に噴出せしめられる。A method for producing the sheet-like fiber composite 2 used in this embodiment will be described below with reference to FIG. In the figure, reference numeral 21 denotes a fluidized bed apparatus, in which a perforated plate 22 is provided in the bottom of the tank, and gas G such as air or nitrogen sent from a gas supply passage is supplied from below the perforated plate 22 to the perforated plate. It is squirted upward through the hole.
【００３１】その結果、流動床装置２１の槽内に入れら
れた粉体状の熱可塑性樹脂は、噴出気体Ｇによって流動
化状態となり、流動床Ｒが形成される。流動床Ｒ内及び
及びその前後壁上端には、連続繊維を案内するためのガ
イドロール２０′、２０′・・が設けられている。As a result, the powdery thermoplastic resin placed in the tank of the fluidized bed apparatus 21 is fluidized by the jet gas G, and the fluidized bed R is formed. Guide rolls 20 ', 20',... For guiding continuous fibers are provided in the fluidized bed R and at the upper end of the front and rear walls thereof.
【００３２】上記流動床装置２１を用い、巻き戻しロー
ル２３から多数の連続フィラメントからなる束状の強化
繊維Ｆ１０本を、巻取りロール２４によりひねりが生じ
ないようにしながら巻き戻しつつ流動床Ｒ中を通過さ
せ、束状強化繊維Ｆの各フィラメントに粉体状熱可塑性
樹脂を付着させる。粉体状熱可塑性樹脂としては、酢酸
ビニル−塩化ビニル共重合体（酢酸ビニル含有量＝８重
量％、平均粒径＝２５０μｍ）を用い、強化繊維として
は、直径２３μｍのフィラメントよりなるロービング状
ガラス繊維（日東紡績社製、４４００ｔｅｘ）を用い
た。Using the fluidized bed apparatus 21, 10 bundles of reinforcing fibers F composed of a large number of continuous filaments are unwound from the unwinding roll 23 while being unwound by the winding up roll 24 while preventing the twist from occurring. Through which the powdery thermoplastic resin adheres to each filament of the bundle-shaped reinforcing fiber F. As the powdery thermoplastic resin, a vinyl acetate-vinyl chloride copolymer (vinyl acetate content = 8% by weight, average particle size = 250 μm) is used, and as the reinforcing fibers, roving-like glass composed of filaments having a diameter of 23 μm. Fiber (4400 tex, manufactured by Nitto Boseki Co., Ltd.) was used.
【００３３】次に、熱可塑性樹脂が付着した強化繊維Ｆ
を、約１８０℃に加熱された一対の加熱ロール２５間を
通過させて、加熱・加圧し、熱可塑製樹脂を溶融させて
これを強化繊維Ｆと一体化せしめ、厚みが０．６の繊維
複合体２６を得、これを巻取りロール２４に巻き取っ
た。この繊維複合体２６の熱可塑性樹脂と強化繊維との
割合は、７５：２５であった。Next, the reinforcing fibers F to which the thermoplastic resin is attached
Is passed between a pair of heating rolls 25 heated to about 180 ° C., heated and pressurized to melt the thermoplastic resin and integrate it with the reinforcing fiber F to obtain a fiber having a thickness of 0.6. The composite 26 was obtained, and was wound on a winding roll 24. The ratio of the thermoplastic resin to the reinforcing fibers in the fiber composite 26 was 75:25.
【００３４】次に、上記繊維複合体２６を切断し、連続
強化繊維が長手方向に配列された幅２１５ｍｍ、厚み
０．６ｍｍのシート状繊維複合体２を、また同じく幅２
２０ｍｍ、厚み０．６ｍｍのシート状繊維複合体２′を
それぞれ得た。Next, the fiber composite 26 is cut, and a sheet-like fiber composite 2 having a width of 215 mm and a thickness of 0.6 mm, in which continuous reinforcing fibers are arranged in the longitudinal direction, is also cut.
Sheet-like fiber composites 2 'each having a thickness of 20 mm and a thickness of 0.6 mm were obtained.
【００３５】上述の成形装置を用いて、本発明の製造方
法を実施する手順について、主として、図３及び図４に
基づいて以下に説明する。図４（イ）は図３のイ−イ
線、同図（ロ）は同じくローロ線、同図（ハ）は同じく
ハ−ハ線にてそれぞれ切断し、矢印方向にみた図であ
る。The procedure for carrying out the manufacturing method of the present invention using the above-described molding apparatus will be described below mainly with reference to FIGS. FIG. 4A is a sectional view taken along the line II-II of FIG. 3, FIG. 4B is a sectional view taken along the lo-ro line, and FIG.
【００３６】シート状繊維複合体２、２′をボビン１、
１′に移し、これを、巻き戻しつつガイドロール３及び
４によって、ほぼコの字状に賦形しながら、内金型５と
ガイド板６との間に一枚づつ導入する。The sheet fiber composites 2 and 2 ′ are
The guide rolls 1 and 1 are introduced one by one between the inner mold 5 and the guide plate 6 while being formed in a substantially U-shape by the guide rolls 3 and 4 while being rewound.
【００３７】引き続き、加熱押圧ロール８を用いて、２
枚のシート状繊維複合体２、２′の両縁部の重ね合わせ
部２７を加熱・加圧して融着させ、内部が中空となされ
たシート状繊維複合体２″を得る。このときの横断面形
状は、図４（イ）に示す通りである。Subsequently, the heating and pressing roll 8 is used to
The overlapping portions 27 at both edges of the sheet-like fiber composites 2 and 2 'are heated and pressed to be fused to obtain a sheet-like fiber composite 2 "having a hollow interior. The surface shape is as shown in FIG.
【００３８】尚、この際に融着された重ね合わせ部２７
が、できるだけ均一な厚みに融着されるよう、加熱押圧
ロール８の温度、圧力等を調整する。次に、図３に示す
ように、シート状繊維複合体２、２′により内部が中空
となされたシート状繊維複合体２″を、押出金型１０内
に導入して、その外周面に溶融した熱可塑性樹脂２８を
被覆して２層成形体２９を得る。このとき、該２層成形
体２９の内面は、当然内金型５により規制される。The overlapping portion 27 fused at this time is
However, the temperature, pressure and the like of the heating and pressing roll 8 are adjusted so that the sheet is fused to a thickness as uniform as possible. Next, as shown in FIG. 3, the sheet fiber composite 2 ″ having a hollow inside formed by the sheet fiber composites 2 and 2 ′ is introduced into the extrusion die 10 and melted on the outer peripheral surface thereof. The two-layer molded body 29 is obtained by coating the thermoplastic resin 28. At this time, the inner surface of the two-layer molded body 29 is naturally regulated by the inner mold 5.
【００３９】２層成形体２９は、引き続き賦形金型１４
に導入される。ここでは、気体導入管７、７から圧入さ
れた加圧空気が、通気孔１３を経て内金型５の端面から
２層成形体２９の中空内部に導入されているので、該中
空内部は常時加圧状態にある。このときの空気内圧は、
０．５〜１０Ｋｇ／ｃｍ2 程度の範囲内にあるのが好ま
しく、０．５Ｋｇ／ｃｍ2 に満たない場合はコーナー部
（本実施例では、樋耳部）の賦形が不充分となり、１０
Ｋｇ／ｃｍ2 を超えると２層成形体２９の熱可塑性樹脂
層２８と、外金型１４の型面１５との間の摩擦が大きく
なって、２層成形体２９が層間剥離を起こす恐れがあ
る。The two-layer molded body 29 is continuously formed with the molding die 14.
Will be introduced. Here, the pressurized air press-fitted from the gas introduction pipes 7, 7 is introduced into the hollow interior of the two-layer molded body 29 from the end face of the inner mold 5 through the vent hole 13, so that the hollow interior is always It is under pressure. The internal air pressure at this time is
It is preferably in the range of about 0.5 to 10 Kg / cm 2, and if it is less than 0.5 Kg / cm 2 , the shaping of the corners (gutter ears in this embodiment) becomes insufficient, and
If it exceeds Kg / cm 2 , the friction between the thermoplastic resin layer 28 of the two-layer molded body 29 and the mold surface 15 of the outer mold 14 becomes large, and the two-layer molded body 29 may cause delamination. is there.
【００４０】２層成形体２９の内部は、このような加圧
下にあるので、外金型１４の入口と出口とではその様子
が異なるのである。即ち、図４（ロ）に示すように、支
承材１９のみとなった該２層成形体２９の内部では、入
口では拡径されていないが、出口では図４（ハ）に示す
ように、外金型１４のテーパー状型面１５に、その外面
を規制されつつ樋耳部３０のみが拡張された状態に成形
される。Since the inside of the two-layer molded body 29 is under such a pressure, the appearance of the inlet and outlet of the outer mold 14 is different. That is, as shown in FIG. 4B, inside the two-layer molded body 29 having only the support member 19, the diameter is not expanded at the entrance, but at the exit, as shown in FIG. Only the gutter ears 30 are formed on the tapered mold surface 15 of the outer mold 14 while the outer surface thereof is restricted.
【００４１】外金型１４は、外層２８、或いはシート状
繊維複合体２″のマトリックス樹脂、中でもマトリック
ス樹脂の熱変形温度以上に温度調節されていることが望
ましい。更には、該樹脂自体が自重によって流動し始め
る温度の近傍に調節されていることが、均一に２層成形
体２９を拡幅させる上で望ましいのである。樹脂温度が
熱変形温度以下では、シート状繊維複合体２″を拡幅す
ることが難しく、また、該樹脂自体が自重によって流動
し始める温度以上では、賦形そのものは容易ではある
が、樹脂が２層成形体２９内を流動することになり、該
２層成形体２９の上部の肉厚が薄くなる。It is desirable that the temperature of the outer mold 14 is controlled to be equal to or higher than the thermal deformation temperature of the outer layer 28 or the matrix resin of the sheet-like fiber composite 2 ″, especially the matrix resin. It is desirable that the temperature is adjusted to be close to the temperature at which the flow starts to flow, in order to uniformly widen the two-layer molded body 29. When the resin temperature is equal to or lower than the heat distortion temperature, the sheet-like fiber composite 2 ″ is widened. When the temperature of the resin itself starts to flow due to its own weight or higher, the shaping itself is easy, but the resin flows in the two-layered molded body 29, and The upper part becomes thinner.
【００４２】引き続き、２層成形体２９は、断熱材１６
を経て冷却金型１７に導入され、その外面を規制されつ
つ冷却され、引取機１８により引き取られ、図４（ハ）
から支承材１９を除いた場合と同じ形状の横断面中空異
形成形体３１を得ることができる。得られた成形体３１
は、その樋耳部３０は所期のデザイン通りの形状を呈す
るものであった。Subsequently, the two-layer molded body 29 is
After being introduced into the cooling mold 17 and cooled down while its outer surface is regulated, it is taken off by the take-off machine 18 and FIG.
A hollow cross-sectionally shaped body 31 having the same shape as that obtained by removing the support member 19 from the above can be obtained. Obtained molded body 31
The gutter ear portion 30 had a shape as expected.
【００４３】[0043]
【発明の効果】本発明は、シート状繊維複合体からなる
横断面中空異形成形体を内層とし、熱可塑性樹脂を外層
とする２層以上の多層成形体を連続的に成形するに際
し、異形横断面を有する内金型により内部中空の横断面
異形成形体を形成し、次いでこの繊維複合体の外面に熱
可塑性樹脂を押し出して積層するとともに、多層成形体
の中空内部に加圧気体を導入し、異形断面を有する外金
型内で外面を規制しつつ成形するので、内部中空の横断
面異形成形体に樹脂を積層した段階では、コーナー部の
Ｒが大きくても、製品形状でのコーナー部のＲ形状は、
湾曲状にも或いは鋭角にも自由に成形できる。According to the present invention, when continuously forming a multi-layered molded article having two or more layers having a hollow cross-section formed of a sheet-like fiber composite as an inner layer and a thermoplastic resin as an outer layer, the cross-section of the deformed shape is obtained. An inner mold having a surface is used to form an inner hollow cross-section deformed body, and then a thermoplastic resin is extruded and laminated on the outer surface of the fiber composite, and a pressurized gas is introduced into the hollow interior of the multilayer molded body. Since the molding is performed while regulating the outer surface in an outer mold having an irregular cross section, even if the R of the corner is large at the stage of laminating the resin on the inner hollow cross section irregularly shaped body, even if the corner of the product shape is large, The R shape of
It can be freely formed into a curved shape or an acute angle.
【００４４】従って、一つの異形金型で複数種類の製品
形状のものを製造することができ、設備費が安価とな
り、また製品規格の変更の際に金型を取り替える手数が
少なくて済むので、製造のスピードアップを図ることが
でき、製造コストも低減され、用途範囲も拡大する。Accordingly, a plurality of types of product shapes can be manufactured with one deformed mold, the equipment cost is reduced, and the number of times for changing the mold when changing the product standard is reduced. Manufacturing speed can be increased, manufacturing costs can be reduced, and the range of applications can be expanded.
【００４５】また、製造工程の最終段階で、成形体の外
面が規制されるので、正確な寸法の製品が容易に得ら
れ、品質向上を図り得る。Further, since the outer surface of the molded body is regulated at the final stage of the manufacturing process, a product having accurate dimensions can be easily obtained, and the quality can be improved.
【図１】本発明の製造方法の実施に用いる装置の一例を
示す概略正面図である。FIG. 1 is a schematic front view showing an example of an apparatus used for carrying out a manufacturing method of the present invention.
【図２】同上装置の最初の工程部分を示す斜視図であ
る。FIG. 2 is a perspective view showing a first process part of the same device.
【図３】図１に示す装置の要部を示す一部切欠拡大断面
図である。FIG. 3 is a partially cut-away enlarged sectional view showing a main part of the device shown in FIG. 1;
【図４】横断面異形中空成形体が、押出金型、外金型を
経る間に、以下に賦形されるかを示す図であって、同図
（イ）は図３のイ−イ線、同図（ロ）はロ−ロ線、同図
（ハ）はハ−ハ線にてそれぞれ切断し、矢印方向にみた
断面図である。FIG. 4 is a view showing whether or not a cross-sectionally deformed hollow molded article is formed as follows while passing through an extrusion die and an outer die, and FIG. FIG. 2B is a cross-sectional view taken along the line C-B and FIG.
【図５】本発明の製造方法に用いる、シート状繊維複合
体の製造方法の一例を示す正断面図である。FIG. 5 is a front sectional view showing an example of a method for producing a sheet-like fiber composite used in the production method of the present invention.
２、２′、２″ シート状繊維複合体 ５ 内金型 ７ 気体導入管 ９ 押出機 10 押出金型 13 通気孔 14 外金型 15 外金型の型面 17 冷却金型 19 支承材 20 シール材 21 流動床装置 25 加熱ロール 26 繊維複合体 27 重ね合わせ部 28 溶融した熱可塑性樹脂 29 ２層成形体 30 樋耳部 31 横断面中空異形成形体 Ｆ 糸状の強化繊維 2, 2 ', 2 "Sheet-like fiber composite 5 Inner mold 7 Gas inlet tube 9 Extruder 10 Extrusion mold 13 Vent hole 14 Outer mold 15 Outer mold surface 17 Cooling mold 19 Supporting material 20 Seal Materials 21 Fluidized bed apparatus 25 Heating roll 26 Fiber composite 27 Lap-up part 28 Melted thermoplastic resin 29 Two-layer molded body 30 Gutter lug 31 Cross-section hollow deformed shaped body F Thread-like reinforcing fiber
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 69/00 - 69/02 B29D 22/00 B29D 31/00 B29C 47/00 - 47/96 B29C 49/00 - 49/80 ──────────────────────────────────────────────────の Continued on the front page (58) Fields surveyed (Int. Cl. 7 , DB name) B29C 69/00-69/02 B29D 22/00 B29D 31/00 B29C 47/00-47/96 B29C 49 / 00-49/80
Claims (1)
シート状繊維複合体を連続的に移送しつつ、該内金型を
包含した形でシート状繊維複合体からなる横断面中空異
形成形体を形成する工程と、該成形体の内面もしくは外
面に熱可塑性樹脂を押し出して積層し、２層以上の多層
成形体とする工程と、該多層成形体を異形横断面を有す
る外金型に導入するとともに、多層成形体の該中空内に
加圧気体を送入してその外面を規制しつつ賦形する工程
と、該賦形された多層成形体を冷却する工程とを有する
ことを特徴とする横断面中空異形成形体の製造方法。1. An outer peripheral surface of an inner mold having an irregular cross section,
A step of forming a cross-sectional hollow heteromorphic shaped body composed of the sheet-shaped fiber composite in a form including the inner mold while continuously transferring the sheet-shaped fiber composite; and applying heat to the inner surface or outer surface of the molded body. Extruding and laminating a plastic resin to form a multilayer molded body of two or more layers, introducing the multilayer molded body into an outer mold having a deformed cross section, and applying a pressurized gas into the hollow of the multilayer molded body. A method for producing a cross-sectionally hollow shaped article, comprising: a step of feeding and shaping while regulating the outer surface thereof; and a step of cooling the shaped multilayer molded article.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12771092A JP3214892B2 (en) | 1992-05-20 | 1992-05-20 | Method for producing hollow cross-section shaped body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12771092A JP3214892B2 (en) | 1992-05-20 | 1992-05-20 | Method for producing hollow cross-section shaped body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05318614A JPH05318614A (en) | 1993-12-03 |
| JP3214892B2 true JP3214892B2 (en) | 2001-10-02 |
Family
ID=14966798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12771092A Expired - Fee Related JP3214892B2 (en) | 1992-05-20 | 1992-05-20 | Method for producing hollow cross-section shaped body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3214892B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8184823B2 (en) | 2007-02-05 | 2012-05-22 | Sony Corporation | Headphone device, sound reproduction system, and sound reproduction method |
| US8265297B2 (en) | 2007-03-27 | 2012-09-11 | Sony Corporation | Sound reproducing device and sound reproduction method for echo cancelling and noise reduction |
| US8452022B2 (en) | 2006-11-07 | 2013-05-28 | Sony Corporation | Digital filter circuit, digital filter program and noise canceling system |
-
1992
- 1992-05-20 JP JP12771092A patent/JP3214892B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8452022B2 (en) | 2006-11-07 | 2013-05-28 | Sony Corporation | Digital filter circuit, digital filter program and noise canceling system |
| US8184823B2 (en) | 2007-02-05 | 2012-05-22 | Sony Corporation | Headphone device, sound reproduction system, and sound reproduction method |
| US8265297B2 (en) | 2007-03-27 | 2012-09-11 | Sony Corporation | Sound reproducing device and sound reproduction method for echo cancelling and noise reduction |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05318614A (en) | 1993-12-03 |
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| LAPS | Cancellation because of no payment of annual fees |