JPH0572852B2 - - Google Patents
Info
- Publication number
- JPH0572852B2 JPH0572852B2 JP62107792A JP10779287A JPH0572852B2 JP H0572852 B2 JPH0572852 B2 JP H0572852B2 JP 62107792 A JP62107792 A JP 62107792A JP 10779287 A JP10779287 A JP 10779287A JP H0572852 B2 JPH0572852 B2 JP H0572852B2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- corrugated pipe
- strip
- rotating mandrel
- extruder
- 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
- 229920003002 synthetic resin Polymers 0.000 claims description 38
- 239000000057 synthetic resin Substances 0.000 claims description 38
- 239000012779 reinforcing material Substances 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000005304 joining Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 229920013716 polyethylene resin Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Description
【発明の詳細な説明】
(イ) 産業上の利用分野
この発明はコルゲート管の製造方法に関し、更
に詳しくは、大きな耐圧強度を具備しているので
土中に埋設して排水管としてよく用いられるコル
ゲート管、特に表面に螺旋状の凸状部分を有する
コルゲート管の製造方法に関する。[Detailed Description of the Invention] (a) Field of Industrial Application This invention relates to a method for manufacturing corrugated pipes, and more specifically, because of their high pressure resistance, they are often buried in the ground and used as drainage pipes. The present invention relates to a method of manufacturing a corrugated pipe, particularly a corrugated pipe having a spiral convex portion on its surface.
(ロ) 従来の技術
一般にコルゲート管には、管壁の凹・凸形状が
軸対称のものと螺旋状のものとがあり、凹・凸形
状が螺旋状の、つまり螺旋凸条を有するコルゲー
ト管は、例えば、回転マンドレルの周面に合成樹
脂の溶融した帯状体を螺旋状に捲回し、この捲回
に当つて先に捲回した帯状体の部分に対し後から
捲回する帯状体の部分の一部が重なり合うように
供給すると共に、その帯状体の供給に併せて重な
り合う帯状体間に、帯状体の長さ方向に沿つて特
定の断面形状を有する可撓性芯材を供給し、表面
に螺旋凸条を形成して得られる。(B) Prior art In general, there are two types of corrugated pipes, one in which the concave and convex shapes of the pipe wall are axially symmetrical and the other in a spiral shape. For example, a belt-shaped body made of molten synthetic resin is spirally wound around the circumferential surface of a rotating mandrel, and the part of the belt-shaped body that is wound later than the part of the belt-shaped body that was wound earlier during this winding. At the same time, a flexible core material having a specific cross-sectional shape is supplied along the length direction of the strips between the overlapping strips, and the surface It is obtained by forming spiral protrusions on.
そして帯状体の重なり合う部分は、回転マンド
レルの周面に並行して対設された1つの押圧ロー
ラによつて押圧接合され、それによつて一体のコ
ルゲート管に成形される(特開昭56−101832号公
報参照)。 The overlapping parts of the strips are pressed together by one pressure roller installed parallel to the peripheral surface of the rotating mandrel, thereby forming an integral corrugated pipe (Japanese Patent Laid-Open No. 56-101832 (see publication).
(ハ) 発明が解決しようとする問題点
しかしながら、上述のごとく押圧ローラを用い
て帯状体の重なり合う部分を押圧接合する際に
は、押圧ローラが1つであり、且つ押圧がほぼ点
接触にて行なわれるに過ぎないので、長い押圧接
合時間がとれず、合成樹脂が硬い場合は接合性に
欠けたり、一方合成樹脂が軟かい場合は螺旋凸条
の断面形状がくずれたりし、所定の強靭なコルゲ
ート管が得られ難いという問題があつた。(C) Problems to be Solved by the Invention However, as described above, when pressing and joining the overlapping parts of the strips using a pressing roller, there is only one pressing roller, and the pressing force is almost point contact. If the synthetic resin is hard, the bonding performance may be lacking, and if the synthetic resin is soft, the cross-sectional shape of the spiral convex strip may be distorted, and the desired toughness may not be achieved. There was a problem that corrugated pipes were difficult to obtain.
(ニ) 問題点を解決するための手段及びその作用
この発明は(i)円筒状の回転マンドレルの周囲
に、押出機から溶融状態の合成樹脂帯状体を供給
して、一部を重ね合すように螺旋状に捲回し、そ
の際(ii)前記合成樹脂帯状体をその断面が屈曲状又
は中空状になるように供給するか、(iii)予め成型さ
れた可撓性補強材を合成樹脂帯状体の内部もしく
は裏面に連続的にかつ同時に供給するか、または
(iv)前記押出機あるいは別の押出機から前記合成樹
脂と同一又は異なる合成樹脂の可撓性補強材を合
成樹脂帯状体の内部もしくは裏面に連続的にかつ
同時に供給し、(v)これによつて表面に凸状部分を
形成されるコルゲート管が回転マンドレルによつ
て回転マンドレルの軸方向に連続的に送り出さ
れ、且つコルゲート管が回転マンドレル上に保持
される間、コルゲート管の帯状体の重ね合せ部分
を、コルゲート管の凸状部分及び凹状部分に係合
する断面凹状の線状押出部材によつて、少なくと
もコルゲート管の半周以上にわたつて押出し接合
と整形を行うことを特徴とするコルゲート管の製
造方法である。(d) Means for solving the problems and their effects The present invention consists of (i) supplying a molten synthetic resin strip from an extruder around a cylindrical rotating mandrel and partially overlapping it; At that time, (ii) the synthetic resin strip is supplied so that its cross section is curved or hollow, or (iii) the pre-molded flexible reinforcing material is wound with the synthetic resin. Continuously and simultaneously feeding inside or on the back side of the strip, or
(iv) continuously and simultaneously supplying a flexible reinforcing material of the same or different synthetic resin as the synthetic resin from the extruder or another extruder to the inside or back surface of the synthetic resin strip; Therefore, the corrugated pipe having a convex portion formed on its surface is continuously fed out by the rotating mandrel in the axial direction of the rotating mandrel, and while the corrugated pipe is held on the rotating mandrel, the strip of the corrugated pipe is A corrugate characterized in that the overlapping portion is extruded and joined and shaped over at least half the circumference of the corrugated pipe by a linear extruded member having a concave cross section that engages the convex portion and the concave portion of the corrugated pipe. This is a method for manufacturing tubes.
すなわち、この発明は、(i)〜(v)の工程からな
り、これらの5つの工程のうち(v)の工程を、主要
な構成上の特徴の一つとし、他の(i)〜(iv)の工程は
いずれも公知の工程であつて、(ii)〜(iv)の工程はい
ずれか1つの工程が選択して採用される。 That is, this invention consists of steps (i) to (v), and among these five steps, step (v) is one of the main structural features, and the other steps (i) to ( All of step iv) are known steps, and any one of steps (ii) to (iv) is selected and employed.
要するに、この発明は、特定の線状押圧部材に
よつて、コルゲート管の凸状部分及び凹状部分を
半周以上にわたつて線状に連続して同時に係合押
圧できるようにし、それによつて合成樹脂の軟・
硬にかかわらずコルゲート管の少なくとも接合性
が良好で、併せて整形性を良好とし、強靭なコル
ゲート管が得られるようにするものである。 In short, this invention makes it possible to engage and press the convex portion and the concave portion of the corrugated pipe simultaneously in a linear manner over half the circumference or more by using a specific linear pressing member, and thereby The softness of
Regardless of the hardness, the corrugated pipe has at least good joining performance, and also has good shaping properties, so that a strong corrugated pipe can be obtained.
特にマンドレルとして回転マンドレルを用い、
その回転マンドレルの回転のみによつてコルゲー
ト管を回転マンドレルの軸方向に連続的に送り出
されるようにし、それによつて、コルゲート管の
送り出しを、コルゲート管の接合と整形を行なう
線状押圧部材とは切り離して回転マンドレルのみ
にて行なえるようにする。このようにコルゲート
管への送り出し力の伝達をコルゲート管の内面か
ら行なえるようにすることによつて、コルゲート
管の外表面の整形性を良好にする。 In particular, using a rotating mandrel as the mandrel,
What is a linear pressing member that allows the corrugated pipe to be continuously fed out in the axial direction of the rotating mandrel only by the rotation of the rotating mandrel, and thereby performs feeding of the corrugated pipe, joining and shaping of the corrugated pipe? Separate it so that it can be done only with a rotating mandrel. By transmitting the delivery force to the corrugated tube from the inner surface of the corrugated tube in this manner, the shaping of the outer surface of the corrugated tube is improved.
この発明において線状押圧部材とは、コルゲー
ト管の凸状部分又はその凸状部分間に形成されて
いる凹状部分を、コルゲート管の約半周以上、す
なわち螺旋角度約180度以上にわたつて連続して
同時に係合押圧する部材を意味し、具体的には、
実施例のごとくエンドレスベルトが好ましいもの
として挙げられる。そして線状押圧部材が凸状部
分及び凹状部分に係合押圧する範囲は、コルゲー
ト管がマンドレル上にある間全てでもよいが、そ
のうちの1周(螺旋角度360度)〜5周の胴巻き
が好ましく、より好ましくは2〜4周の胴巻きで
ある。もちろんこれらの胴巻きは、最初の捲回か
らのほか、最初の2〜3周の後で行つてもよい。 In the present invention, a linear pressing member means a linear pressing member that continues a convex portion of a corrugated pipe or a concave portion formed between the convex portions over about half the circumference of the corrugated pipe or more, that is, a helical angle of about 180 degrees or more. means a member that engages and presses at the same time, specifically,
As shown in the examples, an endless belt is preferred. The range in which the linear pressing member engages and presses the convex portion and the concave portion may be the entire range while the corrugated pipe is on the mandrel, but it is preferable to wrap the body around 1 to 5 times (helical angle of 360 degrees). , more preferably 2 to 4 turns of the body. Of course, these windings may be performed not only from the first winding but also after the first two or three turns.
以上のような構成のエンドレスベルトは、溶融
状態で高温の合成樹脂に常に接触することになる
ので、本来の強靭性と可撓性のほかに特に耐熱性
が要求される。具体的な材料例としては適宜布を
ゴムで張り合わせたものが挙げられるが、特にゴ
ムとしては耐熱性ゴムが用いられる。もちろん、
このようなエンドレスベルトは冷水、冷風などに
よつて冷却されるのが好ましい。 Since the endless belt configured as described above constantly comes into contact with the high-temperature synthetic resin in a molten state, it is particularly required to have heat resistance in addition to its inherent toughness and flexibility. A specific example of the material is a cloth laminated with rubber, and heat-resistant rubber is particularly used as the rubber. of course,
Such an endless belt is preferably cooled by cold water, cold air, or the like.
この発明において、円筒状のマンドレルは、押
出機から溶融状態で供給される合成樹脂帯状体の
一部を重ね合すように螺旋状に捲回して一方向に
連続的にコルゲート管を送り出し形成する。従つ
て円筒状のマンドレルは、具体的には円筒状のマ
ンドレルの本来胴面に斜めに(軸方向に対して)
多数の回転子が回転自在に支持されるか、マンド
レルを、円筒状に配列された細い円筒体によつて
構成し、それらの細い円筒体が互いに平行で斜め
に(マンドレルの仮想円筒軸に対して)配列され
る。 In this invention, a cylindrical mandrel is used to continuously feed a corrugated tube in one direction by winding a synthetic resin strip supplied in a molten state from an extruder in a spiral manner so as to overlap a portion of the synthetic resin strip. . Therefore, specifically, the cylindrical mandrel is formed diagonally (with respect to the axial direction) to the original body surface of the cylindrical mandrel.
Either a number of rotors are rotatably supported, or the mandrel is constructed of a cylindrical array of thin cylinders parallel to each other and oblique (with respect to the imaginary cylindrical axis of the mandrel). ) are arranged.
更にこの発明は、一つの観点によれば、次の(i)
(ii)のコルゲート管の製造装置を提供するものであ
る。 Furthermore, according to one aspect, this invention provides the following (i)
(ii) A corrugated pipe manufacturing apparatus is provided.
(i) 溶融状態の合成樹脂帯状体を押し出す合成樹
脂押出機と、この押出機あるいは別の押出機か
ら前記合成樹脂と同一もしくは異なる合成樹脂
の可撓性補強材、又は予め成型された可撓性補
強材を押し出す補強材の押出機と、合成樹脂押
出機からの帯状体を螺旋状に捲回しつつ、その
帯状体の内部もしくは裏面に帯状体の長手方向
に沿つて、補強材の押出機からの可撓性補強材
を供給して表面に凸条部分を形成し、先に捲回
した帯状体の部分に対して後から捲回する帯状
体の部分の一部を重ね合せ表面に凸状部分を有
するコルゲート管を形成する回転マンドレル
と、このマンドレル上にコルゲート管が保持さ
れている間、凸条部分及び/又はその凸条部分
に形成されている凹条部分に、少なくともコル
ゲート管の半周以上にわたつて連続して同時に
係合し、コルゲート管の帯状体の重ね合せ部分
を押圧するエンドレスベルトとからなるコルゲ
ート管の製造装置。(i) A synthetic resin extruder that extrudes a molten synthetic resin strip, and a flexible reinforcing material made of the same or different synthetic resin from this extruder or another extruder, or a pre-molded flexible reinforcing material; A reinforcing material extruder that extrudes the reinforcing material, and a reinforcing material extruder that spirally winds the strip from the synthetic resin extruder and applies the reinforcing material inside or on the back side of the strip along the longitudinal direction of the strip. A flexible reinforcing material is supplied from the above to form a convex part on the surface, and a part of the part of the band-like body to be wound later is overlapped with the part of the band-like body wound earlier to form a convex part on the surface. A rotating mandrel for forming a corrugated pipe having a shaped portion, and while the corrugated pipe is held on this mandrel, at least the corrugated pipe has a convex portion and/or a grooved portion formed on the convex portion. A corrugated pipe manufacturing device comprising an endless belt that continuously and simultaneously engages over half the circumference and presses the overlapping portion of the corrugated pipe band.
(ii) 溶融状態の合成樹脂帯状体をその断面が屈曲
状又は中空状になるように押し出す合成樹脂押
出機と、この合成樹脂押出機からの帯状体を螺
旋状に捲回しつつ、その帯状体の内部もしくは
裏面に帯状体の長手方向に沿つて補強用空間部
を区画形成して表面に凸条部分を形成し、先に
捲回した帯状体の部分に対して後から捲回する
帯状体の部分の一部を重ね合せ表面に凸条部分
を有するコルゲート管を形成する回転マンドレ
ルと、このマンドレル上にコルゲート管が保持
されている間、凸条部分及び/又はその凸条部
分間に形成されている凹条部分に、少なくとも
コルゲート管の半周以上にわたつて連続して同
時に係合し、コルゲート管の帯状体の重ね合せ
部分を押圧するエンドレスベルトとからなるコ
ルゲート管の製造装置。(ii) A synthetic resin extruder that extrudes a molten synthetic resin strip so that its cross section becomes curved or hollow; and a synthetic resin extruder that extrudes a molten synthetic resin strip so that its cross section becomes curved or hollow; A reinforcing space is formed along the longitudinal direction of the strip inside or on the back side of the strip, and a convex strip is formed on the surface of the strip, and the strip is wound later on the part of the strip that was wound earlier. A rotating mandrel for forming a corrugated pipe having a convex part on its surface by overlapping a part of the parts thereof, and while the corrugated pipe is held on this mandrel, the convex part and/or the formation between the convex part. An apparatus for manufacturing a corrugated pipe, which comprises an endless belt that continuously and simultaneously engages the grooved portion over at least half the circumference of the corrugated pipe and presses the overlapping portion of the band-like bodies of the corrugated pipe.
更にこの発明は、他の一つの観点によれば、特
定の構成を備えたコルゲート管自体を提供するも
のである。 Furthermore, according to another aspect, the present invention provides a corrugated pipe itself having a specific configuration.
すなわち、そのコルゲート管は、合成樹脂帯状
体を螺旋状に捲回しつつ、帯状体の内部もしくは
裏面に帯状体の長手方向に沿つて可撓性補強材を
挿入又は補強用空間部を区画形成してコルゲート
管の表面に凸条部分を形成したものである。そし
てこのコルゲート管は、製造時に凸条部分及び/
又は凹条部分を線状部材によつて継続して係合押
圧されているので、帯状体の重ね合せ部分の押圧
接合と凸条部分の形成が十分に行なわれ、従つて
特に強靭性が要求される排水管として好適に利用
できる。 That is, the corrugated pipe is made by winding a synthetic resin strip in a spiral shape, and inserting a flexible reinforcing material or defining a reinforcing space inside or on the back surface of the strip along the longitudinal direction of the strip. This is a corrugated pipe with protrusions formed on its surface. During manufacturing, this corrugated pipe has ridges and/or
Alternatively, since the concave portion is continuously engaged and pressed by the linear member, the overlapping portions of the strips are pressed together and the convex portion is sufficiently formed, and therefore particularly strong toughness is required. It can be suitably used as a drain pipe.
(ホ) 実施例
以下図に示す具体的参考例及び実施例に基づい
てこの発明方法を詳述する。なお、これによつて
この発明方法が限定されるものではない。(e) Examples The method of the present invention will be described in detail based on specific reference examples and examples shown in the figures below. Note that the method of this invention is not limited thereby.
まず第1図において、コルゲート管の連続製造
装置1は、溶融状態の合成樹脂帯状体Aを連続的
に押し出す合成樹脂押出機2と、可撓性補強材と
しての合成樹脂管状体Bを連続的に押し出す補強
材押出機3と、これらの両押出機から供給される
帯状体Aと管状体Bとを螺旋状に重ね合せ捲回し
螺旋管Cを連続的に形成する回転マンドレル4
と、得られる螺旋管Cの重ね合せ部分を押圧して
接合させ且つ後述する螺旋凸条Dを整形させるた
めの線状押圧部材としてのエンドレスベルト5と
から主としてなる。
First, in FIG. 1, a corrugated pipe continuous manufacturing apparatus 1 includes a synthetic resin extruder 2 that continuously extrudes a synthetic resin strip A in a molten state, and a synthetic resin tubular body B as a flexible reinforcing material. a reinforcing material extruder 3 for extruding the reinforcing material, and a rotating mandrel 4 for continuously forming a helical tube C by overlapping and winding the strip A and the tubular body B supplied from these extruders in a spiral shape.
and an endless belt 5 as a linear pressing member for pressing and joining the overlapping portions of the obtained helical tubes C and shaping the helical convex ridges D to be described later.
回転マンドレル4は、複数本の中空軸6,7…
…を一つの仮想円筒の周面に沿つて所定の間隔を
おいて平行に配設して構成され、各中空軸は図示
しない軸端(第1図の左方)に備えるスプロケツ
トにチエーンを掛けて同一方向に等速回転するよ
うに構成され、それによつて実質的に回転マンド
レル4が回転するようにされている。 The rotating mandrel 4 has a plurality of hollow shafts 6, 7...
... are arranged in parallel at predetermined intervals along the circumferential surface of one virtual cylinder, and each hollow shaft is connected to a sprocket provided at the shaft end (left side in Figure 1), not shown, by a chain. The rotating mandrel 4 is configured to rotate at a constant speed in the same direction, thereby substantially rotating the rotating mandrel 4.
エンドレスベルト5は、得られる螺旋管Cの後
述する螺旋凹条Eの断面形状に対応する断面を有
し、ローラ8,9,10にて移動自在に支持され
ている。 The endless belt 5 has a cross-section corresponding to the cross-sectional shape of a helical groove E, which will be described later, of the obtained helical tube C, and is movably supported by rollers 8, 9, and 10.
次に以上の構成を備えたコルゲート管の連続製
造装置1の作動を第1〜2図に基いて説明し、そ
れによりコルゲート管の連続製造方法を説明す
る。 Next, the operation of the apparatus 1 for continuously manufacturing corrugated pipes having the above configuration will be explained based on FIGS. 1 and 2, and a method for continuously manufacturing corrugated pipes will be explained accordingly.
回転マンドレル4を回転させ(実質的に)、そ
の回転マンドレル4の周囲に、合成樹脂押出機2
から溶融状態のポリエチレン樹脂帯状体Aを供給
すると、その帯状体が螺旋状に捲回されて螺旋管
Cを形成する。更にその帯状体Aが捲回される際
には、帯状体の裏部に、補強材押出機3からポリ
エチレン樹脂管状体Bを帯状体Aの長手方向に沿
つて供給する。かくして螺旋管Cの表面には凸状
部分としての螺旋凸条Dが表出形成され、実質的
にコルゲート管Fの体裁が整う。 The rotating mandrel 4 is rotated (substantially), and the synthetic resin extruder 2 is placed around the rotating mandrel 4.
When a molten polyethylene resin strip A is supplied, the strip is spirally wound to form a spiral tube C. Further, when the strip A is wound, a polyethylene resin tubular body B is supplied from the reinforcing material extruder 3 to the back side of the strip A along the longitudinal direction of the strip A. In this way, the spiral protrusions D as convex portions are formed on the surface of the helical tube C, and the appearance of the corrugated tube F is substantially arranged.
また上述の螺旋管Cの形成は、先に捲回した帯
状体Aの部分に対し後から捲回する帯状体Aの部
分の一部を重ね合せて行なわれ、この重ね合せ部
分がエンドレスベルト5によつて胴巻き状に押圧
され、それによつて接合される。通常、回転マン
ドレル4の回転により帯状体A及び管状体Bを引
張る速さは、それらの各体が押し出される速さよ
り早く且つ両体がまだ軟らかい状態なので、上述
の帯状体の重ね合せ部分の接合は一応行なわれる
が、不十分になることが多い。これに対しては、
従来、押圧ローラを用いて重ね合せ部分を押圧し
ているが、押圧時間(又は距離)が瞬間的なの
で、合成樹脂の状態によつては効果が十分とは言
えない。しかるに上述のエンドレスベルト5によ
る胴巻き状の押圧、つまり約3.5周の螺旋回転
(約360×3.5度)の間の継続する押圧によれば、
重ね合せ部分の接合が長時間継続して行なわれる
ので十部保障される。またエンドレスベルト5の
断面が、螺旋凸条間に形成されている凹状部分と
しての螺旋凹条(凹溝)のそれに対応し、同様長
時間継続して係合しているので、所望形状、つま
り所望の耐圧強度のコルゲート管Fが得られる。
特に回転マンドレル4の回転は、溶融状態の帯状
体A及び管状体Bを引張り状態にしているので、
例えば管状体Bが回転マンドレル4の回転軸に平
行な方向に偏平になりやすく、従つて通常耐圧強
度の低下がさけられないが、上述のエンドレスベ
ルト5の整形作用により、管状体Bの断面が所定
の真円形状に維持され、所望の耐圧強度が得られ
る。 Further, the above-mentioned spiral tube C is formed by overlapping a portion of the band-like body A to be wound later on the previously-wound part of the band-like body A, and this overlapping portion forms the endless belt 5. It is pressed into a wrapper shape and joined by this. Normally, the speed at which the belt-like body A and the tubular body B are pulled by the rotation of the rotating mandrel 4 is faster than the speed at which each of these bodies is extruded, and both bodies are still in a soft state, so that the overlapping portions of the above-mentioned belt-like bodies are joined. Although this is sometimes done, it is often insufficient. For this,
Conventionally, a pressure roller has been used to press the overlapping portions, but since the pressing time (or distance) is instantaneous, the effect may not be sufficient depending on the state of the synthetic resin. However, according to the wrapping-like pressure by the endless belt 5 described above, that is, the continuous pressure during about 3.5 spiral rotations (about 360 x 3.5 degrees),
Since the overlapping parts are joined continuously for a long period of time, 10 parts are guaranteed. In addition, the cross section of the endless belt 5 corresponds to that of the spiral concave strips (concave grooves) as concave portions formed between the spiral convex strips, and is similarly engaged continuously for a long time, so that the desired shape, that is, A corrugated pipe F having the desired pressure resistance strength is obtained.
In particular, the rotation of the rotating mandrel 4 puts the molten band-like body A and tubular body B in tension.
For example, the tubular body B tends to become flattened in the direction parallel to the rotation axis of the rotating mandrel 4, and therefore a decrease in pressure resistance is usually unavoidable. The predetermined perfect circular shape is maintained, and the desired compressive strength is obtained.
以上の例とは異なり、帯状体の重ね合せと、こ
れらの帯状体の間の管状体の介在の仕方を第3図
のごとく変えることもできる。つまり、帯状体A
は1つの横幅で2巻き管状体Ba,Baを外側から
覆つている。 Unlike the above example, it is also possible to change the manner in which the strips are superimposed and the tubular body is interposed between these strips, as shown in FIG. 3. In other words, the band A
has one width and covers the two-wound tubular body Ba, Ba from the outside.
次に第4図に示すコルゲート管の連続製造装置
1bは、2台の合成樹脂押出機2b,2′bを備
え、更に2本のエンドレスベルト5b,5′bを
備えている。つまり、まず回転マンドレル4bの
周囲に、押出機2′bから溶融状態のポリエチレ
ン樹脂帯状体A′bを供給し、その帯状体が螺旋状
に捲回されて螺旋管C′bが形成される。そしてこ
の螺旋管C′bは螺旋凹・凸条を全く有しない管
で、その螺旋状の重ね合せ部分をエンドレスベル
ト5′bにて押圧し、それによつて接合を確実に
する。次いで、得られた螺旋管C′bの上に、第1
図と同様に、帯状体Abと管状体Bbとが重ねられ
る。説明を省略するが、得られるコルゲート管
Fbは第5図に示すごとく、二重管構造である。
なお、Gb,Gbは帯状体A′bの重ね合せ部分であ
る。 Next, a continuous corrugated pipe manufacturing apparatus 1b shown in FIG. 4 is equipped with two synthetic resin extruders 2b and 2'b, and further equipped with two endless belts 5b and 5'b. That is, first, a molten polyethylene resin strip A'b is supplied from an extruder 2'b around a rotating mandrel 4b, and the strip is spirally wound to form a spiral tube C'b. . This spiral tube C'b is a tube having no spiral concave or convex ridges, and the overlapping spiral portion is pressed by an endless belt 5'b, thereby ensuring the joining. Next, on the obtained spiral tube C′b, the first
Similarly to the figure, the strip Ab and the tubular body Bb are overlapped. Although the explanation is omitted, the obtained corrugated pipe
Fb has a double tube structure as shown in FIG.
Note that Gb and Gb are the overlapping portions of the strips A'b.
以上の各例とは異なり、合成樹脂管状体を帯状
体の内部に挿入して螺旋状に捲回してもよい。す
なわち、第6図において、溶融状態の段階で、合
成樹脂帯状体Ac内部には合成樹脂管状体Bcが挿
入され、図示しない回転マンドレルの周囲に螺旋
状に捲回して螺旋管に形成する。そして一点鎖線
で示すエンドレスベルト5cによつて帯状体Ac
の重ね合せ部分Gcが押圧接合され、且つ帯状体
Acの螺旋凸条Dcが整形される。なお、帯状体Ac
は、先に成形された管状体Bcを合成樹脂押出機
内に供給し、押出しノズルから管状体Bcを中央
に維持して溶融状態の合成樹脂と共に押出して得
られる。もちろん押出しノズルはその開口断面形
状を帯状体Acの断面に対応して略逆T字型に形
成している。 Unlike each of the above examples, the synthetic resin tubular body may be inserted into the inside of the band-shaped body and wound spirally. That is, in FIG. 6, a synthetic resin tubular body Bc is inserted into the synthetic resin band Ac in a molten state, and is spirally wound around a rotating mandrel (not shown) to form a spiral tube. Then, the belt-shaped body Ac is
The overlapping portion Gc of is pressed and joined, and the strip
The spiral convex ridge Dc of Ac is shaped. In addition, the band Ac
is obtained by feeding the previously molded tubular body Bc into a synthetic resin extruder, and extruding it together with the molten synthetic resin from an extrusion nozzle while maintaining the tubular body Bc in the center. Of course, the opening of the extrusion nozzle is formed into a substantially inverted T-shape in cross section corresponding to the cross section of the strip Ac.
更に以上のような螺旋管を、第4〜5図に示す
ような内側螺旋管の上に(外側に)被せ、第7図
のごとく二重構造に構成することもできる。 Furthermore, the spiral tube as described above can be placed over (outside of) the inner spiral tube as shown in FIGS. 4 and 5 to form a double structure as shown in FIG. 7.
以下その他のコルゲート管の断面構造例を挙げ
る。 Examples of other cross-sectional structures of corrugated pipes are listed below.
第8〜10図
第8図は帯状体Aeの裏面に帯状体Aeの長手方
向に沿つて硬質塩化ビニル樹脂のごとき可撓性補
強材Beを挿入している例を示す。なお、第9図
の例は、帯状体Afの重ね合せ部分Gfを段付きに
構成し、第10図は可撓性補強材Bgが断面正方
形に構成されている点がそれぞれ特徴である。Figures 8 to 10 Figure 8 shows an example in which a flexible reinforcing material Be, such as a hard vinyl chloride resin, is inserted on the back surface of the strip Ae along the longitudinal direction of the strip Ae. The example shown in FIG. 9 is characterized in that the overlapping portion Gf of the strips Af is structured in a stepped manner, and the example in FIG. 10 is characterized in that the flexible reinforcing material Bg is structured in a square cross section.
第11〜13図及び第14〜16図
帯状体の断面構造が逆U字片Hhとこの片の両
端から水平方向に延びる大小水平片Ih,Jhとから
なり、螺旋凹状の底部で両片の結合部と、小水平
片Jhと、大水平片Ihの先端部とが重ね合せられ、
適宜エンドレスベルト(図示省略)により接合さ
れている。第14〜16図は帯状体の断面構造が
以上とは異なる3つの例を示す。Figures 11 to 13 and Figures 14 to 16 The cross-sectional structure of the strip consists of an inverted U-shaped piece Hh and large and small horizontal pieces Ih and Jh extending horizontally from both ends of this piece. The joining part, the small horizontal piece Jh, and the tip of the large horizontal piece Ih are overlapped,
They are joined by an endless belt (not shown) as appropriate. 14 to 16 show three examples in which the cross-sectional structure of the strip is different from the above.
第17〜19図及び第20〜26図
帯状体の断面構造が、逆U字片Hlとこの片の
一端(右端)から水平方向に延びる水平片Jlと、
他端からやや下向きに延びる傾斜片Ilとからなる
硬質片部、並びにこの硬質片部の下向開口部分を
閉じる軟質片部Klからなる。第20〜26図は、
帯状体の断面構造が以上とはわずかづつ異なる例
を示す。17-19 and 20-26 The cross-sectional structure of the strip includes an inverted U-shaped piece Hl and a horizontal piece Jl extending horizontally from one end (right end) of this piece.
It consists of a hard piece part consisting of an inclined piece Il extending slightly downward from the other end, and a soft piece part Kl that closes the downward opening part of this hard piece. Figures 20 to 26 are
Examples will be shown in which the cross-sectional structure of the strip is slightly different from the above.
第27図
帯状体は異形押出しにより中空部Ltを有して
いる。またここで得られるコルゲート管は凸条部
分と凹条部分とが併せてエンドレスベルト5tに
よつて係合押圧されている。もちろんこの場合の
コルゲート管の製造方法及び装置は、エンドレス
ベルトの断面が異なるだけで、第1図のものと同
様のものが使用できるので、説明を省略する。
FIG. 27 The strip has a hollow portion Lt by profile extrusion. Further, in the corrugated pipe obtained here, the convex portion and the concave portion are both engaged and pressed by the endless belt 5t. Of course, the corrugated pipe manufacturing method and apparatus in this case can be the same as those shown in FIG. 1, with the only difference being the cross section of the endless belt, so the explanation will be omitted.
以上の例とは異なり、一つの合成樹脂帯状体の
内部又は裏面に、同時に2つの可撓性補強材を並
べて挿入し螺旋状に捲回し、それによつて2つの
螺旋凸条を有するコルゲート管を形成してもよ
い。もちろんこの場合に用いられるエンドレスベ
ルトは独立の2つである。 Different from the above example, two flexible reinforcing materials are simultaneously inserted side by side into the inside or back side of one synthetic resin strip and wound spirally, thereby forming a corrugated pipe having two spiral ridges. may be formed. Of course, two independent endless belts are used in this case.
(ヘ) 発明の効果
この発明によれば、コルゲート管の凸状部分及
び凹状部分を特定の線状押圧部材によつて継続し
て係合押圧するので、帯状体の重ね合せ部分の押
圧接合と凸状部分の整形が充分行なわれ、それに
よつて殊に強靭性が要求される排水管として好適
なコルゲート管が得られる。(F) Effects of the Invention According to this invention, since the convex portion and the concave portion of the corrugated pipe are continuously engaged and pressed by a specific linear pressing member, it is possible to press and join the overlapping portions of the strips. The convex portions are sufficiently shaped, thereby providing a corrugated pipe suitable as a drain pipe that particularly requires toughness.
第1図はこの発明方法を説明するためのコルゲ
ート管の製造装置の一参考例を示す要部機能説明
斜視図、第2図はその装置で得られるコルゲート
管の要部縦断面説明図、第3図は他の参考例を示
す第2図相当図、第4図は他の参考例を示す第1
図相当図、第5図はその第2図相当図、第6〜1
0図はいずれもその他の参考例を示す第2図相当
図、第11図は更に他の参考例を示すコルゲート
管の一部側面説明図、第12図はそのコルゲート
管の縦断面図、第13図はその縦断面図の要部拡
大断面図、第14〜16図は更に他の参考例を示
す第13図相当図、第17〜19図は更に他の参
考例を示す第11〜13図相当図、第20〜26
図は更に他の参考例を示す第13図相当図であ
る。第27図はこの発明に係るコルゲート管の製
造方法の実施例を説明するための第13図相当図
である。は更に他の例を示す第13図相当図であ
る。
1……コルゲート管の連続製造装置、2……合
成樹脂押出機、3……補強材押出機、4……回転
マンドレル、5……エンドレスベルト、A……帯
状体、B……可撓性補強材、C……螺旋管、D…
…螺旋凸条(凸状部分)、F……コルゲート管。
FIG. 1 is a perspective view illustrating the functions of the main parts of a corrugated pipe manufacturing apparatus as a reference example for explaining the method of the present invention, FIG. Figure 3 is a diagram equivalent to Figure 2 showing another reference example, and Figure 4 is a diagram equivalent to Figure 1 showing another reference example.
Figure 5 is a diagram equivalent to Figure 2, and Figures 6 to 1 are equivalent to Figure 5.
Figure 0 is a diagram equivalent to Figure 2 showing other reference examples, Figure 11 is a partial side explanatory view of a corrugated pipe showing another reference example, Figure 12 is a longitudinal sectional view of the corrugated pipe, Figure 13 is an enlarged cross-sectional view of the main part of the vertical cross-sectional view, Figures 14 to 16 are views corresponding to Figure 13 showing still other reference examples, and Figures 17 to 19 are views 11 to 13 showing still other reference examples. Figure equivalent figure, No. 20-26
The figure is a diagram equivalent to FIG. 13 showing yet another reference example. FIG. 27 is a view corresponding to FIG. 13 for explaining an embodiment of the method for manufacturing a corrugated pipe according to the present invention. 13 is a diagram corresponding to FIG. 13 showing still another example. 1... Continuous production equipment for corrugated pipes, 2... Synthetic resin extruder, 3... Reinforcement extruder, 4... Rotating mandrel, 5... Endless belt, A... Band-shaped body, B... Flexibility Reinforcement material, C... spiral tube, D...
...Spiral convex ridge (convex portion), F...Corrugated pipe.
Claims (1)
機から溶融状態の合成樹脂帯状体を供給して、
一部を重ね合すように螺旋状に捲回し、その際 (ii) 前記合成樹脂帯状体をその断面が屈曲状又は
中空状になるように供給するか、 (iii) 予め成形された可撓性補強材を合成樹脂帯状
体の内部もしくは裏面に連続的にかつ同時に供
給するか、または (iv) 前記押出機あるいは別の押出機から前記合成
樹脂と同一又は異なる合成樹脂の可撓性補強材
を合成樹脂帯状体の内部もしくは裏面に連続的
にかつ同時に供給し、 (v) これによつて表面に凸状部分を形成されるコ
ルゲート管が回転マンドレルによつて回転マン
ドレルの軸方向に連続的に送り出され、且つコ
ルゲート管が回転マンドレル上に保持される
間、コルゲート管の帯状体の重ね合せ部分を、
コルゲート管の凸状部分及び凹状部分に係合す
る断面凹状の線状押出部材によつて、少なくと
もコルゲート管の半周以上にわたつて押出し接
合と整形を行うことを特徴とするコルゲート管
の製造方法。[Claims] 1 (i) A molten synthetic resin strip is supplied from an extruder around a cylindrical rotating mandrel,
(ii) supply the synthetic resin strip so that its cross section is curved or hollow; (iv) a flexible reinforcing material of the same or different synthetic resin from the extruder or another extruder; (v) The corrugated tube, which forms a convex portion on the surface, is continuously and simultaneously supplied to the inside or back surface of the synthetic resin strip by the rotating mandrel in the axial direction of the rotating mandrel. While the corrugated tube is being fed out and the corrugated tube is held on a rotating mandrel, the overlapping portions of the corrugated tube strips are
A method for producing a corrugated pipe, which comprises performing extrusion joining and shaping over at least half the circumference of the corrugated pipe using a linear extruded member having a concave cross section that engages the convex portion and the concave portion of the corrugated pipe.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10779287A JPS63272530A (en) | 1987-04-30 | 1987-04-30 | Manufacture of corrugated tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10779287A JPS63272530A (en) | 1987-04-30 | 1987-04-30 | Manufacture of corrugated tube |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63044776A Division JPH0622887B2 (en) | 1988-02-26 | 1988-02-26 | Corrugated pipe manufacturing equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63272530A JPS63272530A (en) | 1988-11-10 |
JPH0572852B2 true JPH0572852B2 (en) | 1993-10-13 |
Family
ID=14468145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10779287A Granted JPS63272530A (en) | 1987-04-30 | 1987-04-30 | Manufacture of corrugated tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63272530A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2003244171B2 (en) | 2002-09-09 | 2007-11-15 | Fisher & Paykel Healthcare Limited | Limb for Breathing Circuit |
US7291240B2 (en) | 2002-09-09 | 2007-11-06 | Fisher & Paykel Healthcare Limited | Method of forming a conduit using a wound sacrificial layer |
CN104476787A (en) * | 2014-10-27 | 2015-04-01 | 湖南前元新材料有限公司 | Krah pipe continuous-production device and production technology |
KR102586935B1 (en) * | 2018-11-28 | 2023-10-11 | 현대자동차주식회사 | Manufacturing method of waterproof duct and waterproof duct thereby |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5033112A (en) * | 1973-07-26 | 1975-03-31 | ||
JPS5863422A (en) * | 1981-10-13 | 1983-04-15 | Taigaasu Polymer Kk | Continuous manufacture of coil-embedded bellow hose |
-
1987
- 1987-04-30 JP JP10779287A patent/JPS63272530A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5033112A (en) * | 1973-07-26 | 1975-03-31 | ||
JPS5863422A (en) * | 1981-10-13 | 1983-04-15 | Taigaasu Polymer Kk | Continuous manufacture of coil-embedded bellow hose |
Also Published As
Publication number | Publication date |
---|---|
JPS63272530A (en) | 1988-11-10 |
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