JPH066348B2 - Method and apparatus for manufacturing corrugated pipe - Google Patents
Method and apparatus for manufacturing corrugated pipeInfo
- Publication number
- JPH066348B2 JPH066348B2 JP63137081A JP13708188A JPH066348B2 JP H066348 B2 JPH066348 B2 JP H066348B2 JP 63137081 A JP63137081 A JP 63137081A JP 13708188 A JP13708188 A JP 13708188A JP H066348 B2 JPH066348 B2 JP H066348B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- strip
- shaped material
- pipe wall
- molten 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
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は管内面が平滑でかつ管外周面に螺旋状の突条を
有する合成樹脂製コルゲート管の製造方法および装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a synthetic resin corrugated pipe having a smooth inner pipe surface and a spiral projection on the outer peripheral surface of the pipe.
従来の技術 従来から管の偏平強度を高めるために、管の外周面に中
空突条を一体に成形したものは広く知られており、この
コルゲート管を連続して成形する方法および装置は、た
とえば特公昭58-35454号公報に開示されている。これは
管壁となる第1のテープと、突条となる第2のテープと
を押出成形して重ね合わせるものであるが、同公報第10
図には中空突条部を予め成形したものも開示されてい
る。2. Description of the Related Art Conventionally, it has been widely known that a hollow ridge is integrally formed on the outer peripheral surface of a pipe in order to increase the flatness of the pipe. It is disclosed in Japanese Patent Publication No. 58-35454. In this method, a first tape that serves as a pipe wall and a second tape that serves as a ridge are extrusion-molded and superposed on each other.
The figure also discloses a hollow ridge portion preformed.
発明が解決しようとする課題 しかし、上記従来のものは第1のテープ同志をそれぞれ
の端縁同志で重ね合わせて接合するため、管内面に段部
が形成されて平滑面とはならず、管内面に螺旋状の溝が
形成されることになる。そのため、この管で長い流路を
形成した場合には溝が流体抵抗となって流体の流れを阻
害するおそれがあった。SUMMARY OF THE INVENTION However, in the above-mentioned conventional one, since the first tapes are joined by being overlapped with each other at their respective end edges, a step portion is not formed on the inner surface of the pipe to form a smooth surface. A spiral groove will be formed on the surface. Therefore, when a long flow path is formed by this pipe, the groove may become a fluid resistance and obstruct the flow of the fluid.
本発明は上記問題点を解決して、管内面を平滑にできる
コルゲート管の製造方法および装置を提供すること目的
とする。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a method and an apparatus for manufacturing a corrugated pipe that can smooth the inner surface of the pipe.
課題を解決するための手段 上記問題点を解決するために本発明のコルゲート管の製
造方法は、管内面が平滑でかつ管外周面に螺旋状の突条
を有する合成樹脂製のコルゲート管を製造するに際し、
管壁部とこの管壁部表面に突設された中空突条部からな
る帯状素材をダイ装置により連続的に押出成形し、押出
成形された帯状素材を成形ロールに導入して螺旋状に巻
回し、導入した管壁部端縁と隣接する帯状素材の管壁部
端縁上に溶融樹脂を供給し、圧着ロールに形成された一
対の鍔部により、導入された帯状素材の中空突条部を案
内して、帯状素材を隣接する管壁部端縁同士が突き合わ
されて当接するか、または隙間をあけて接近する近接状
態になるように位置決めするとともに、この圧着ロール
の一方の鍔部により、前記溶融樹脂を管壁部端縁の近接
部に押圧して帯状素材の管壁部端縁同士を接合するもの
である。Means for Solving the Problems In order to solve the above-mentioned problems, a method for manufacturing a corrugated pipe according to the present invention is a corrugated pipe made of synthetic resin having a smooth inner pipe surface and spiral ridges on the outer peripheral surface of the pipe. When doing
A strip material consisting of a pipe wall and a hollow ridge protruding from the surface of the pipe wall is continuously extruded by a die device, and the extruded strip material is introduced into a forming roll and spirally wound. The molten resin is supplied to the pipe wall edge of the strip-shaped material adjacent to the introduced pipe wall edge and the pair of flanges formed on the pressure roll causes the hollow ridges of the strip-shaped material introduced. The strip-shaped material is positioned so that the edges of the adjacent pipe wall portions abut against each other or come into contact with each other, or approach each other with a gap, and by one collar portion of this pressure roll. The molten resin is pressed against the vicinity of the edges of the tube wall portions to join the edges of the tube wall portions of the band-shaped material.
また、コルゲート管の製造方法は、管内面が平滑でかつ
管外周面に螺旋状の突条を有する合成樹脂製コルゲート
管の製造装置において、管壁部とこの管壁部表面に突設
された中空突条部からなる帯状素材を連続して押出成形
するダイ装置を設け、このダイ装置から押出成形された
帯状素材を回転可能で軸心方向に移動可能に螺旋状に巻
回する成型ロールを備えた成型ロール装置を設け、この
帯状素材の導入部に、導入した管壁部端縁と隣接する帯
状素材の管壁部端縁上に溶融樹脂を供給する溶融樹脂吐
出管を設け、両側に形成された鍔部により、導入した帯
状素材の中空突条部を案内して、帯状素材の管壁部端縁
が隣接する帯状素材の管壁部端縁に突き合わせされて当
接するか、または隙間をあけて接近する近接位置に位置
決めするとともに、一方の鍔部により前記溶融樹脂を管
壁部の端縁近接部に押圧して帯状素材の管壁部端縁同士
を接合する鍔付圧着ロールを設けたものである。Further, the corrugated pipe manufacturing method is a device for manufacturing a corrugated pipe made of synthetic resin in which the inner surface of the pipe is smooth and the outer circumferential surface of the pipe has a spiral projection, and the corrugated pipe is provided on the pipe wall and the surface of the pipe wall. A die roll that continuously extrudes a band-shaped material consisting of hollow ridges is provided, and a molding roll that spirally winds the band-shaped material extruded from this die device so that it can rotate and move in the axial direction. Provided with a molding roll device equipped with this, the introduction portion of the strip-shaped material, the molten resin discharge pipe for supplying the molten resin to the pipe wall end edge of the strip-shaped material adjacent to the introduced pipe wall end edge is provided, on both sides The formed flange guides the introduced hollow ridge of the strip-shaped material so that the edge of the pipe wall of the strip-shaped material abuts and abuts the edge of the pipe wall of the adjacent strip-shaped material. And position it in the close position It is provided with a flanged press roll for joining the pipe wall edges to each other of the strip material by pressing the molten resin to the edge proximal part of the tube wall by one of the flange portion.
作用 上記構成によれば、隣接する管壁部端縁を突き合わせて
当接するか、または隙間をあけて接近する近接状態で、
溶融樹脂吐出管から供給される溶融樹脂を圧着ロールの
鍔部で押圧して管壁部端縁同士を接合するので、管内面
を極めて平滑なものに仕上げることができるとともに、
近接部の隙間を埋め外面を覆う溶融樹脂により、充分な
強度を確保することができる。また、圧着ロールの鍔部
により、導入した帯状素材の位置決めを行うので、正確
なピッチで帯状素材を導入して螺旋状に巻回し成形する
ことができるとともに、帯状素材の管壁部の成形幅の精
度もそれほど要求されず、広範囲に許容することができ
る。Action According to the above configuration, the adjacent pipe wall end edges are abutted against each other or abutted with a gap, in a close state,
Since the molten resin supplied from the molten resin discharge pipe is pressed by the flange portion of the pressure roll to join the edges of the pipe wall portions together, the inner surface of the pipe can be made extremely smooth, and
Sufficient strength can be secured by the molten resin that fills the gaps in the adjacent portions and covers the outer surface. In addition, since the flange of the pressure roll is used to position the introduced strip-shaped material, it is possible to introduce the strip-shaped material at an accurate pitch and roll it into a spiral shape, as well as the forming width of the pipe wall of the strip-shaped material. The accuracy of is not required so much and can be allowed in a wide range.
実施例 以下、本発明の一実施例を図面に基づいて説明する。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
第2図および第3図において、1は動力源を備えた基台
2上に横方向に配設された樹脂押出装置で、一端側上部
に原料投入ホッパ3が取付けられるとともに、一端側か
ら他端側に向って混練押出用スクリュ4を内蔵したシリ
ンダ5が配設される。シリンダ5の一端側には前記動力
源に連結されてスクリュ4を駆動するギヤボックス6が
取付けられる。In FIG. 2 and FIG. 3, reference numeral 1 denotes a resin extruding device laterally arranged on a base 2 provided with a power source. A raw material feeding hopper 3 is attached to an upper part of one end side of the resin extruding device. A cylinder 5 having the kneading / extruding screw 4 built therein is arranged toward the end side. A gear box 6 that is connected to the power source and drives the screw 4 is attached to one end of the cylinder 5.
7は押出装置1の他端側に配設されたダイ装置で、シリ
ンダ5の他端部に取付部材8を介してダイヘッド9が取
付けられ、ダイヘッド9の下部にダイ10が取付けられ
る。そして、シリンダ5から連続する樹脂供給通路11が
それぞれ形成されてダイヘッド9内で水平通路11aから
垂直通路11bに90°下方に折れ曲っている。前記ダイ10
は、樹脂を、第4図に示すように、帯状に形成される管
壁部12と、この管壁部12の表面に一体的に突出形成され
た中空突条部13からなる帯状素材14を連続成形するよう
に構成される。Reference numeral 7 denotes a die device arranged on the other end side of the extrusion device 1. A die head 9 is attached to the other end portion of the cylinder 5 via an attachment member 8, and a die 10 is attached to the lower part of the die head 9. Further, resin supply passages 11 continuous from the cylinder 5 are formed, and are bent downward in the die head 9 from the horizontal passage 11a to the vertical passage 11b by 90 °. The die 10
Is a resin, as shown in FIG. 4, a strip-shaped raw material 14 consisting of a strip-shaped tube wall 12 and a hollow ridge 13 integrally formed on the surface of the tube wall 12. It is configured to be continuously molded.
15はダイ装置7からダイ装置7の下方にわたって配設さ
れた素材冷却装置で、ダイ装置7の下方に配置された冷
却水槽16と、ダイ装置7と冷却水槽16の間に配置された
シャワーリング17と、冷却水槽16内に配置された湾曲ガ
イド18と、ダイ装置7内から湾曲ガイド18内にわたって
配置されて中空突条部13の中空部13aを案内冷却する冷
却用内管19とで構成される。前記シャワーリング17はダ
イ10の出口下方で押出される帯状素材14の周囲に配置さ
れ、帯状素材14の外面に冷却水を噴射する。このシャワ
ーリング17には外部からの冷却水供給管17aが接続され
るが、冷却水槽16内の冷却水20をポンプを介して供給し
てもよい。前記湾曲ガイド18は、第5図に示すように、
冷却水槽16内で半円状に形成されるとともに、帯状素材
14の管壁部12に内周側で突条部13に外周側で、それぞれ
外嵌して外周面に開口するガイド溝18aが長さ方向にわ
たって形成され、入口部では支持体21によりガイド溝18
aの外周側開口面が閉鎖される。また、この湾曲ガイド1
8には内面にガイド溝18aに連通する切欠穴18bが周方向
所定間隔ごとに形成され、帯状素材14への冷却を促進さ
せている。前記冷却用内管19は第5図に示すように基端
部がダイヘッド9内を通って樹脂供給垂直通路11aから
ダイ10に達し、さらにダイ10の押出口10aから湾曲ガイ
ド18のガイド溝18a内に挿通され、その先端はガイド溝1
8の最下位置を少し過ぎた位置に至る。この冷却用内管1
9は、第5図、第7図に示すように、中空部13aに移動自
在に嵌合する断面台形状の冷却水給水管19aとこの給水
管19aに所定間隔をあけて内嵌する冷却水排水管19bとか
らなる二重管で構成され、給水管19aの先端が閉塞され
るとともに排水管19bの先端が給水管19内で開口され、
これら給排水管19a,19bにより帯状素材14が内側から冷
却される。前記湾曲ガイド18を含む素材冷却装置15によ
り、帯状素材14を中空突状部13が外側となる円弧状に形
成して管成形時に発生する応力を減少させ、中空突条部
13の変形や表面の凹凸の発生を防止できる。Reference numeral 15 denotes a material cooling device arranged from the die device 7 to the lower part of the die device 7, a cooling water tank 16 arranged below the die device 7, and a shower ring arranged between the die device 7 and the cooling water tank 16. 17, a curved guide 18 arranged in the cooling water tank 16, and an inner pipe 19 for cooling arranged to extend from the die device 7 to the curved guide 18 to guide and cool the hollow portion 13a of the hollow ridge 13. To be done. The shower ring 17 is arranged around the strip-shaped material 14 extruded below the outlet of the die 10 and sprays cooling water onto the outer surface of the strip-shaped material 14. A cooling water supply pipe 17a from the outside is connected to the shower ring 17, but the cooling water 20 in the cooling water tank 16 may be supplied via a pump. The bending guide 18 is, as shown in FIG.
It is formed into a semi-circular shape in the cooling water tank 16 and has a band-shaped material.
A guide groove 18a, which is fitted on the inner peripheral side of the tube wall 12 of 14 and on the outer peripheral side of the protrusion 13, is formed over the lengthwise direction so as to be externally fitted and opened to the outer peripheral surface. 18
The outer peripheral opening surface of a is closed. Also this curved guide 1
Notch holes 18b communicating with the guide groove 18a are formed on the inner surface of the member 8 at predetermined intervals in the circumferential direction, and cooling of the band-shaped material 14 is promoted. As shown in FIG. 5, the cooling inner tube 19 has its base end portion passing through the inside of the die head 9 to reach the die 10 from the resin supply vertical passage 11a, and further from the extrusion port 10a of the die 10 to the guide groove 18a of the curved guide 18. It is inserted in the inside and its tip is the guide groove 1
A little past the bottom position of 8. This cooling inner tube 1
As shown in FIG. 5 and FIG. 7, reference numeral 9 denotes a cooling water supply pipe 19a having a trapezoidal cross section which is movably fitted in the hollow portion 13a, and cooling water which is fitted in the water supply pipe 19a at a predetermined interval. It is composed of a double pipe consisting of a drain pipe 19b, the tip of the water supply pipe 19a is closed and the tip of the drain pipe 19b is opened in the water supply pipe 19,
The strip-shaped material 14 is cooled from the inside by these water supply / drain pipes 19a and 19b. By the material cooling device 15 including the curved guide 18, the band-shaped material 14 is formed in an arc shape with the hollow projecting portion 13 on the outer side to reduce the stress generated at the time of pipe forming, and the hollow projecting portion.
It is possible to prevent deformation of 13 and occurrence of surface irregularities.
22は冷却水槽16上に配設された成型ロール装置で、帯状
素材14を螺旋状に巻回する成型ロール23を有する。この
成型ロール23は、第2図、第3図に示すように、冷却水
槽16の側部に立設された基板24とこの基板24に対向する
側板25との間に、複数(図面では12本)の巻取ローラ
26が円周方向一定間隔ごとに回転自在に支持される。こ
れら巻取ローラ26は、基板26を貫通する支持軸にそれぞ
れ連動スプロケット27が固定され、各連動スプロケット
27に一本の連動チェン28が巻回されて連結連動される。
さらに、一本の巻取ローラ26の支持軸に受動スプロケッ
ト29が取付けられ、この受動スプロケット29が駆動用モ
ータ30の出力軸に取付けられた駆動スプロケット31に駆
動チェン32を介して駆動され、各巻取ローラ26を同一方
向、同一回転速度で回転駆動される。また、これら巻取
ローラ26の回転により、帯状素材14を螺旋状に巻取って
成形した管33を第2図、第9図に矢印Aで示す周方向に
回転させるとともに、成型ロール23の軸心Oに沿う矢印
B方向に送り出すように構成される。なお、成形管33の
突条部に係合するガイドロールを設けて成形管33を矢印
B方向に送り出すようにしてもよい。A forming roll device 22 is arranged on the cooling water tank 16 and has a forming roll 23 that spirally winds the band-shaped material 14. As shown in FIGS. 2 and 3, a plurality of the molding rolls 23 are provided between the substrate 24 standing on the side portion of the cooling water tank 16 and the side plate 25 facing the substrate 24 (in the drawing, 12 Book) take-up roller
26 are rotatably supported at regular intervals in the circumferential direction. These take-up rollers 26 have interlocking sprockets 27 fixed to support shafts penetrating the substrate 26, respectively.
One interlocking chain 28 is wound around 27 to be interlocked and interlocked.
Further, a passive sprocket 29 is attached to the support shaft of one winding roller 26, and this passive sprocket 29 is driven via a drive chain 32 by a drive sprocket 31 attached to the output shaft of a drive motor 30 to drive each winding. The take-up roller 26 is rotationally driven in the same direction and at the same rotational speed. Further, by rotating these winding rollers 26, the tube 33 formed by spirally winding the strip-shaped material 14 is rotated in the circumferential direction indicated by the arrow A in FIGS. 2 and 9, and the shaft of the molding roll 23 is rotated. It is configured to send out in the direction of arrow B along the center O. Note that a guide roll that engages with the protruding portion of the forming pipe 33 may be provided to send the forming pipe 33 in the direction of arrow B.
成型ロール23への帯状素材14の導入部には、第8図、第
9図に示すように、熱風供給ノズル34と、溶融樹脂吐出
管35と、位置決め兼用の圧着ロール36とが配設される。
前記熱風供給ノズル34は、既に成型ロール23に巻回され
た帯状素材14Aと、導入された帯状素材14Bとの隣接する
管壁部12、12の端縁12a、12aの近接部37に向けて配置さ
れ、両端縁12a、12aを溶融する。ここで近接部37の近接
とは、第1図(a)に示す両端縁12a、12aに所定の間隙d
をあけた状態から第1図(b)に示す両端縁12a、12aが互
いに突き合わされた当接状態までの範囲をさす。前記溶
融樹脂吐出管35は、第2図に示すようにダイヘッド9内
の樹脂供給垂直通路11bから分岐され、その周囲に巻付
けられたヒーター38により樹脂の加熱融溶状態を保持
し、その先端を熱風により溶融状態となった近接部37上
に開口して溶融樹脂39を供給する。40は溶融樹脂吐出管
35に介装された開閉バルブである。前記圧着ロール36は
中空突条部13に係合可能な鍔部36a,36bを有する鍔付ロ
ールで、支持板24に支持部材41を介して回転自在で、一
本の巻取ローラ26の対向位置に配設される。この圧着ロ
ーラ36は両鍔部36a,36bで中空突条部13を案内して導入
位置(ピッチ)を決定するとともに、成形管33側の押圧
用鍔部36b外周面で溶融樹脂39を近接部37に押し付け、
管壁部12、12の端縁同志を溶着する。(この時、間隙d
がある場合には間隙d内に充填されるが、反対側には巻
取ローラ26があるため、成形管33内面側にまで押し出さ
れることはない。) 次にこの製造装置によるコルゲート管の製造方法につい
て説明する。As shown in FIGS. 8 and 9, a hot-air supply nozzle 34, a molten resin discharge pipe 35, and a pressure-bonding roll 36 which also serves as a positioner are arranged at the introduction portion of the band-shaped material 14 into the molding roll 23. It
The hot air supply nozzle 34, the strip-shaped material 14A already wound around the molding roll 23, and the end edges 12a of the tube wall portions 12, 12 adjacent to the introduced strip-shaped material 14B, toward the proximity portion 37 of 12a. It is arranged and both end edges 12a, 12a are melted. Here, the proximity of the proximity portion 37 means that a predetermined gap d is formed between both end edges 12a, 12a shown in FIG. 1 (a).
The range from the opened state to the abutted state in which both end edges 12a, 12a shown in FIG. 1 (b) are butted against each other. The molten resin discharge pipe 35 is branched from the resin supply vertical passage 11b in the die head 9 as shown in FIG. 2, and a heater 38 wound around the molten resin discharge pipe 35 keeps the molten and molten state of the resin, and the tip thereof. Is opened on the proximity portion 37 which is in a molten state by hot air, and molten resin 39 is supplied. 40 is a molten resin discharge pipe
It is an open / close valve installed in 35. The pressure-bonding roll 36 is a flanged roll having flanges 36a and 36b engageable with the hollow protrusion 13, and is rotatable with respect to the support plate 24 via the support member 41 and faces one winding roller 26. Is arranged in a position. The crimping roller 36 guides the hollow ridges 13 by the flanges 36a and 36b to determine the introduction position (pitch), and the molten resin 39 is brought closer to the outer peripheral surface of the pressing flange 36b on the molding pipe 33 side. Press it to 37,
The edges of the tube wall portions 12, 12 are welded together. (At this time, the gap d
If there is a gap, the gap d is filled, but since the winding roller 26 is provided on the opposite side, it is not pushed out to the inner surface side of the forming tube 33. ) Next, a method of manufacturing a corrugated pipe by this manufacturing apparatus will be described.
1.まず、樹脂押出装置1の原料投入ホッパ3から投入さ
れた原料を、シリンダ5内で加熱してスクリュ4により
混練し、ダイヘッド9に形成した樹脂供給通路11に押出
す。この通路11の垂直通路11bでは、樹脂の一部を溶融
樹脂吐出管35に分配供給している。そして、垂直通路11
bからダイ10に供給した樹脂は帯状素材14に形成され、
押出口10aより下方に押出される。1. First, the raw material fed from the raw material feeding hopper 3 of the resin extrusion device 1 is heated in the cylinder 5, kneaded by the screw 4, and extruded into the resin supply passage 11 formed in the die head 9. In the vertical passage 11b of the passage 11, a part of the resin is distributed and supplied to the molten resin discharge pipe 35. And the vertical passage 11
The resin supplied from b to the die 10 is formed into the band-shaped material 14,
It is extruded downward from the extrusion port 10a.
2.成形された帯状素材14は、ダイ10内から中空部13aに
冷却用内管19が嵌合され、またシャワーリング17から冷
却水が吹付けられて内側および外側から冷却が開始され
る。そして、湾曲ガイド18において、帯状素材14は冷却
用内管19および冷却水槽16の冷却水20によりさらに冷却
されて中空突条部13が整形されるとともに、中空突条部
13が外周側となる円弧状に成形される。2. In the formed band-shaped material 14, an inner pipe 19 for cooling is fitted from the inside of the die 10 into the hollow portion 13a, and cooling water is sprayed from the shower ring 17 to start cooling from inside and outside. Then, in the curved guide 18, the strip-shaped material 14 is further cooled by the cooling inner pipe 19 and the cooling water 20 in the cooling water tank 16 to shape the hollow ridges 13, and the hollow ridges.
13 is formed in an arc shape on the outer peripheral side.
3.湾曲ガイド18から圧着ロール36により導入されて成型
ロール23に巻取られる帯状素材14Bは、圧着ロール36に
より既に巻回された帯状素材14Aの管壁部端縁12aとの間
に、所定の間隙dを形成する位置、あるいは突き合せ状
態となる位置に案内される。そして、これら近接部37の
管壁部端縁12a、12aには熱風供給ノズル34から熱風が吹
き付けられて加熱溶融され、さらに溶融樹脂吐出管35か
ら溶融樹脂39が供給される。つぎに、圧着ロール36の押
圧用鍔部36bによって溶融樹脂39を近接部37に押圧し
(間隙dに充填し)、両管壁部端縁12a、12a同志を互い
に接合して管33を成形する。この成型管33は、各巻取ロ
ーラ26により周方向Aに回転されるとともにB方向に送
り出される。3. The strip-shaped material 14B introduced from the curved guide 18 by the pressure-bonding roll 36 and wound on the forming roll 23 has a predetermined distance between the strip-shaped material 14A already wound by the pressure-bonding roll 36 and the tube wall end edge 12a. Is guided to the position where the gap d is formed or the position where the gap is brought into a butt state. Then, hot air is blown from the hot air supply nozzle 34 to the tube wall end edges 12a, 12a of these adjacent portions 37 to be heated and melted, and the molten resin 39 is supplied from the molten resin discharge pipe 35. Next, the molten resin 39 is pressed against the proximity portion 37 (filling the gap d) by the pressing flange portion 36b of the pressure roll 36, and both pipe wall end edges 12a and 12a are joined together to form the pipe 33. To do. The molding tube 33 is rotated in the circumferential direction A by each winding roller 26 and is fed in the B direction.
上記実施例によれば、押出し成形した帯状素材14を、中
空突状部13に挿入した冷却用内管19で内側から冷却する
とともに、シャワーリング17および冷却水槽16により外
側から冷却して、湾曲ガイド18により管壁部12と中空突
条部13を案内しつつ中空突条部13が外周側となるように
円弧状に成形するので、中空突条部13の形状が変形する
ことなく表面も滑らかに湾曲され、成型ロール23への巻
回時に発生する応力をきわめて少なくでき、中空突条部
13の変形を防止できる。また、近接部37に熱風供給ノズ
ル34から熱風を供給して加熱溶融したのち、溶融樹脂39
を供給し、圧着ロール36の押圧用鍔部36bで押圧するの
で、帯状素材14の管壁部12a、12a同志を確実に溶着接合
することができる。According to the above-mentioned embodiment, the extruded band-shaped material 14 is cooled from the inside by the cooling inner tube 19 inserted into the hollow protrusion 13, and is cooled from the outside by the shower ring 17 and the cooling water tank 16, and is curved. Since the guide 18 guides the tube wall portion 12 and the hollow ridge portion 13 while forming the hollow ridge portion 13 into an arc shape so that the hollow ridge portion 13 is on the outer peripheral side, the shape of the hollow ridge portion 13 is not deformed and the surface is also It is smoothly curved, and the stress generated when it is wound around the forming roll 23 can be extremely reduced, and the hollow ridge
13 deformation can be prevented. Further, after the hot air is supplied from the hot air supply nozzle 34 to the adjacent portion 37 to heat and melt the molten resin 39.
Since it is supplied and pressed by the pressing flange portion 36b of the pressure roll 36, the tube wall portions 12a, 12a of the band-shaped material 14 can be reliably welded and joined.
発明の効果 以上に述べたごとく本発明によれば、管壁部と中空突状
部からなる帯状素材を押出し成形後、隣接する管壁部の
端縁が隙間のあけて接近するか、あるいは突き合わされ
て当接する近接状態になるように、圧接ロールの鍔部で
帯状素材を案内して成型ロールに螺旋状に巻回し、近接
部上に溶融樹脂を供給して圧着ロールにより溶融樹脂を
近接部に押圧し、帯状素材の管壁部端縁同志を接合する
ので、管内面をきわめて平坦な平滑面に形成することが
できるとともに、近接部の隙間を埋めて外面を覆う溶融
樹脂により、充分な強度を確保することができる。さら
に圧着ロールの鍔部で導入する帯状素材を案内して位置
決めするので、帯状素材のピッチを正確に保持できると
ともに、帯状素材の管壁部の幅に幾分のバラツキがあっ
ても充分に許容することができて、密接状態から所定範
囲の隙間が生じた状態まで広範囲に対応することができ
る。Effects of the Invention According to the present invention as described above, after extruding a band-shaped material composed of a pipe wall portion and a hollow protruding portion, the end edges of adjacent pipe wall portions approach each other with a gap or a protrusion. The strip-shaped material is guided by the flange of the pressure roll and wound spirally around the forming roll so as to be brought into close contact with each other. Since the edges of the pipe wall of the strip-shaped material are joined together, the inner surface of the pipe can be formed into an extremely flat and smooth surface, and the molten resin that covers the outer surface by filling the gaps in the adjacent parts is sufficient. The strength can be secured. Furthermore, since the band-shaped material to be introduced is guided and positioned by the flange part of the crimp roll, the pitch of the band-shaped material can be accurately maintained, and even if there is some variation in the width of the tube wall part of the band-shaped material, it is well tolerated. Therefore, it is possible to cope with a wide range from a close state to a state in which a gap in a predetermined range is generated.
図面は本発明の一実施例を示し、第1図(a)、(b)はそれ
ぞれ成型ロールへの導入位置の帯状素材を示す断面図、
第2図および第3図は製造装置を示す全体正面図および
全体側面図、第4図は帯状素材の断面図、第5図は素材
冷却装置を示す縦断面図、第6図は湾曲ガイドを示す部
分斜視図、第7図は第5図に示すI−I矢視図、第8図お
よび第9図はそれぞれ成型ロールの素材導入部を示す平
面図および斜視図である。 7…ダイ装置、12…管壁部、12a…端縁、13…中空突条
部、14…帯状素材、15…素材冷却装置、18…湾曲ガイ
ド、19…冷却用内管、22…成型ロール装置、23…成型ロ
ール、26…巻取ローラ、33…成形管、35…溶融樹脂吐出
管、36…圧着ロール、36b…押圧用鍔部、37…近接部、3
9…溶融樹脂。The drawings show an embodiment of the present invention, and FIGS. 1 (a) and 1 (b) are cross-sectional views showing a band-shaped material at the introduction position to a molding roll, respectively.
2 and 3 are overall front view and overall side view showing the manufacturing apparatus, FIG. 4 is a sectional view of the band-shaped material, FIG. 5 is a longitudinal sectional view showing the material cooling device, and FIG. 6 is a curved guide. FIG. 7 is a partial perspective view shown in FIG. 7, FIG. 7 is a view taken along the line II of FIG. 5, and FIGS. 8 and 9 are a plan view and a perspective view showing the material introducing portion of the molding roll, respectively. 7 ... Die device, 12 ... Pipe wall part, 12a ... Edge, 13 ... Hollow ridge part, 14 ... Strip material, 15 ... Material cooling device, 18 ... Curved guide, 19 ... Cooling inner tube, 22 ... Forming roll Device, 23 ... Molding roll, 26 ... Winding roller, 33 ... Molding tube, 35 ... Molten resin discharge tube, 36 ... Crimping roll, 36b ... Press flange portion, 37 ... Proximity portion, 3
9 ... Molten resin.
Claims (2)
条を有する合成樹脂製のコルゲート管を製造するに際
し、 管壁部とこの管壁部表面に突設された中空突条部からな
る帯状素材をダイ装置により連続的に押出成形し、 押出成形された帯状素材を成形ロールに導入して螺旋状
に巻回し、 導入した管壁部端縁と隣接する帯状素材の管壁部端縁上
に溶融樹脂を供給し、 圧着ロールに形成された一対の鍔部により、導入された
帯状素材の中空突条部を案内して、帯状素材を隣接する
管壁部端縁同士が突き合わされて当接するか、または隙
間をあけて接近する近接状態になるように位置決めする
とともに、 この圧着ロールの一方の鍔部により、前記溶融樹脂を前
記近接部に押圧して帯状素材の管壁部端縁同士を接合す
ることを特徴とするコルゲート管の製造方法。1. When manufacturing a corrugated pipe made of a synthetic resin having a smooth inner pipe surface and a spiral projection on the outer peripheral surface of the pipe, a pipe wall portion and a hollow ridge protruding from the surface of the pipe wall portion. The strip-shaped material consisting of the parts is continuously extruded by a die device, the extruded strip-shaped material is introduced into a forming roll and spirally wound, and the pipe wall of the strip-shaped material adjacent to the end edge of the introduced pipe wall part The molten resin is supplied onto the end edges of the parts, and the pair of flanges formed on the pressure bonding roll guides the hollow ridges of the introduced strip-shaped material so that the edges of adjacent pipe wall portions of the strip-shaped material are It is positioned so as to be in a close state where they are brought into contact with each other or come in close contact with each other with a gap therebetween, and the flange portion of one of the pressure rolls presses the molten resin against the adjacent portion so that the pipe wall of the strip-shaped material is pressed. Koruge characterized by joining edges of parts Method of manufacturing the door tube.
条を有する合成樹脂製コルゲート管の製造装置におい
て、 管壁部とこの管壁部表面に突設された中空突条部からな
る帯状素材を連続して押出成形するダイ装置を設け、 このダイ装置から押出成形された帯状素材を回転可能で
軸心方向に移動可能に螺旋状に巻回する成型ロールを備
えた成型ロール装置を設け、 この帯状素材の導入部に、導入した管壁部端縁と隣接す
る帯状素材の管壁部端縁上に溶融樹脂を供給する溶融樹
脂吐出管を設け、 両側に形成された鍔部により、導入した帯状素材の中空
突条部を案内して、帯状素材の管壁部端縁が隣接する帯
状素材の管壁部端縁に突き合わせされて当接するか、ま
たは隙間をあけて接近する近接位置に位置決めするとと
もに、一方の鍔部により前記溶融樹脂を管壁部端縁の近
接部に押圧して帯状素材の管壁部端縁同士を接合する鍔
付圧着ロールを設けたことを特徴とするコルゲート管の
製造装置。2. A manufacturing apparatus for a synthetic resin corrugated pipe having a smooth inner surface of a pipe and a spiral projection on an outer peripheral surface of the pipe, wherein a pipe wall portion and a hollow ridge portion protruding from the surface of the pipe wall portion. A molding roll provided with a die device for continuously extruding a strip-shaped material made of, and a molding roll for spirally winding the extruded strip-shaped material from the die device so as to be rotatable and movable in the axial direction. A device is provided, a molten resin discharge pipe for supplying molten resin is provided on the end portion of the pipe material adjacent to the introduced pipe wall end edge of the strip material, and a collar formed on both sides. Guides the hollow ridges of the strip-shaped material that has been introduced, and the pipe wall edge of the strip-shaped material is abutted and abutted against the pipe wall edge of the adjacent strip-shaped material, or approaches with a gap. It is positioned close to the An apparatus for manufacturing a corrugated pipe, characterized in that a crimping roll with a collar is provided which presses the molten resin to a portion near the edges of the pipe wall portion to join the edges of the pipe wall portions of the strip-shaped material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63137081A JPH066348B2 (en) | 1988-06-03 | 1988-06-03 | Method and apparatus for manufacturing corrugated pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63137081A JPH066348B2 (en) | 1988-06-03 | 1988-06-03 | Method and apparatus for manufacturing corrugated pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01306232A JPH01306232A (en) | 1989-12-11 |
JPH066348B2 true JPH066348B2 (en) | 1994-01-26 |
Family
ID=15190449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63137081A Expired - Fee Related JPH066348B2 (en) | 1988-06-03 | 1988-06-03 | Method and apparatus for manufacturing corrugated pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH066348B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0737081B2 (en) * | 1992-03-03 | 1995-04-26 | 株式会社ダイカロン化工 | Method and apparatus for manufacturing synthetic resin pipe |
KR100278849B1 (en) * | 1998-07-22 | 2001-02-01 | 김인식 | Synthetic Resin Spiral Hollow Tube with Reinforcement Layer and Manufacturing Method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5844582U (en) * | 1981-09-18 | 1983-03-25 | 金尾 史朗 | Spiral-wound corrugated tube with synthetic resin inner membrane body |
JPS5973127A (en) * | 1982-10-20 | 1984-04-25 | Toyo Chem Co Ltd | Production of corrugated pipe |
-
1988
- 1988-06-03 JP JP63137081A patent/JPH066348B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH01306232A (en) | 1989-12-11 |
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