JP2608769B2 - Synthetic resin spiral tube manufacturing method and bending molding apparatus used in this method - Google Patents
Synthetic resin spiral tube manufacturing method and bending molding apparatus used in this methodInfo
- Publication number
- JP2608769B2 JP2608769B2 JP20714788A JP20714788A JP2608769B2 JP 2608769 B2 JP2608769 B2 JP 2608769B2 JP 20714788 A JP20714788 A JP 20714788A JP 20714788 A JP20714788 A JP 20714788A JP 2608769 B2 JP2608769 B2 JP 2608769B2
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- molding
- ridge
- resin material
- rotary shaft
- 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、例えば地中に埋設して使用されるコルゲー
ト管のように、外周面に螺旋突条が形成された合成樹脂
管の製造方法と、この方法に使用される帯状合成樹脂材
の屈曲成形装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a synthetic resin pipe having a spiral ridge formed on an outer peripheral surface thereof, such as a corrugated pipe buried underground. And an apparatus for bending and forming a belt-shaped synthetic resin material used in this method.
従来からこの種の合成樹脂管を製造するには、例え
ば、仮装円柱上に数本の成形用回転軸を配設して、該成
形用回転軸の一端部を基台に片持状に軸架すると共に、
各回転軸を駆動手段に連結し、且つこの成形用回転軸を
前記仮装円柱の軸芯に対してやや周方向に傾斜させた状
態にし、管成形時には、成形後に螺旋状の補強条となる
中空突条部分と管内周壁となる板状部分とを有する半溶
融状態の帯状成形材を成形用ダイから押し出して、該帯
状成形材を各成形軸上間に亘るように螺旋状に巻き付け
ると共に、この巻き付け時に成形材の一側縁部と隣り合
う他側縁部とを順次重合溶着させて成形軸を回転駆動さ
せながら外周面に中空突条を螺旋状に設けた合成樹脂管
を連続成形していく方法が採用されている。Conventionally, in order to manufacture this kind of synthetic resin pipe, for example, several rotating shafts for molding are arranged on a temporary cylinder, and one end of the rotating shaft for molding is cantilevered on a base. While hanging
Each rotating shaft is connected to a driving means, and the forming rotating shaft is slightly inclined in the circumferential direction with respect to the axis of the temporary cylinder, and at the time of tube forming, a hollow reinforcing strip is formed as a spiral reinforcing strip after forming. A band-shaped molding material in a semi-molten state having a ridge portion and a plate-shaped portion serving as an inner wall of the tube is extruded from a molding die, and the band-shaped molding material is spirally wound so as to extend between the respective molding shafts. At the time of winding, one side edge of the molding material and the other side edge adjacent thereto are sequentially polymer-welded to continuously drive a molding shaft while rotating the molding shaft to continuously mold a synthetic resin tube in which a hollow ridge is spirally provided on the outer peripheral surface. The method of going is adopted.
しかしながら、この方法によると、成形用ダイにより
予め、成形後に螺旋状の補強条となる中空突条部分と管
内周壁となる板状部分とを有する半溶融状態の帯状成形
材を押し出して、成形用回転軸に高速で螺旋状に巻回す
るものであるから、半溶融状態の帯状成形材が引張り等
によって変形する虞れがあると共に巻回中に型崩れが生
じ、従って、この帯状成形材によって形成される螺旋状
中空突条の形状や厚み等が不均一となる。However, according to this method, a band-shaped molding material in a semi-molten state having a hollow ridge portion serving as a spiral reinforcing strip and a plate-shaped portion serving as an inner wall of a tube is extruded beforehand by a molding die, and the molding material is extruded. Since it is wound around the rotary shaft at a high speed in a spiral shape, the band-shaped molding material in the semi-molten state may be deformed by pulling or the like, and the shape may be lost during winding. The shape, thickness, etc. of the formed spiral hollow ridges are not uniform.
さらに、成形用回転軸上で半溶融状態の成形材をその
一側縁部と隣り合う他側縁部とを順次重合溶着させるも
のであるから、重合させたのち、一定の温度にまで冷却
して溶着一体化するまでには比較的時間がかかり、その
間にズレや変形が生じて整然とした形状の管体をえるこ
とができず、製品価値が低下するという問題点があっ
た。Furthermore, since the molding material in a semi-molten state is formed by sequentially polymerizing and welding one side edge and the adjacent side edge on the molding rotary shaft, the polymer is polymerized and then cooled to a certain temperature. It takes a relatively long time to perform welding and integration, and in the meantime, there is a problem that a deviation or deformation occurs, and a neatly shaped tube cannot be obtained, and the product value is reduced.
本発明はこのような問題点を解消するために創案され
たものであり、螺旋突条の形状や肉厚が一定化された高
精度の合成樹脂螺旋管を効率良く製造できる方法及びこ
の方法に使用する帯状合成樹脂材の屈曲成形装置を提供
することを目的とするものである。The present invention was devised in order to solve such problems, and a method for efficiently manufacturing a high-precision synthetic resin spiral tube in which the shape and the wall thickness of the spiral ridge are made uniform, and to the method. It is an object of the present invention to provide an apparatus for bending a synthetic resin material to be used.
上記目的を達成するために、本発明の合成樹脂螺旋管
の製造方法は、半溶融状態の帯状合成樹脂材を、水槽内
に配設した外周縁が成形用回転軸よりも大径の円弧状に
彎曲した成形面に形成している成形板に向かって供給し
てこの成形板の成形面に被覆させながら該成形面に沿っ
て移動させることにより、形成すべき合成樹脂螺旋管の
彎曲方向に連続的に屈曲させると共に、両端に水平縁部
を有し且つ上部が開口した断面U字状ないしV字状の基
体部からなる突条材に成形し、この突条材を水槽内を通
過中に該合成樹脂材の軟化温度よりもやや低い温度に冷
却したのち、成形用回転軸に、隣接する突条材の一側水
平縁部と他側水平縁部とが重合するべく連続供給して該
成形用回転軸上に螺旋状に巻回すると共に隣接する突条
材の重合された水平縁部の対向側部間に半溶融状態の合
成樹脂材を介在させることによってこの合成樹脂材によ
り一体化させながら螺旋突条を形成していくことを特徴
とするものである。In order to achieve the above object, a method for manufacturing a synthetic resin spiral tube according to the present invention is characterized in that a semi-molten band-shaped synthetic resin material is formed in an arc-like shape having an outer peripheral edge arranged in a water tank and having a larger diameter than a rotary shaft for molding. By feeding toward the forming plate formed on the curved forming surface and moving along the forming surface while covering the forming surface of the forming plate, in the bending direction of the synthetic resin spiral tube to be formed. While being continuously bent, it is formed into a ridge material composed of a base portion having a U-shaped or V-shaped cross section with horizontal edges at both ends and an open top, and this ridge material is being passed through the water tank. After being cooled to a temperature slightly lower than the softening temperature of the synthetic resin material, the molding rotary shaft is continuously supplied so that the one horizontal edge and the other horizontal edge of the adjacent protrusion are superposed. Horizontally wound spirally on the molding rotating shaft and superposed adjacent ridges While integrated by the synthetic resin material by interposing a synthetic resin material of a semi-molten state between parts of opposite sides is characterized in that continue to form a spiral ridge.
この製造方法において、突条材の対向側部間に介在さ
せる半溶融状態の合成樹脂材としては、該突条材の幅よ
りも大きい幅を有する帯状合成樹脂材であってもよく、
紐状ないしは細紐帯状の合成樹脂材であってもよい。In this manufacturing method, the synthetic resin material in the semi-molten state interposed between the opposed side portions of the ridge member may be a band-shaped synthetic resin material having a width larger than the width of the ridge member,
It may be a string-shaped or thin string-shaped synthetic resin material.
又、突条材に形成する帯条合成樹脂材の屈曲成形装置
としては、成形用回転軸の突条材巻込始端部側の下方
に、外周縁が成形用回転軸よりも大径の円弧状に彎曲し
た成形面とされ、且つ該成形面の断面がU字状ないしは
V字状に形成されると共に、該成形用回転軸の外周に沿
う方向に円弧状に彎曲してなる成形板を配設し、該成形
板の基端側を帯状合成樹脂材の導入側に指向させると共
に、先端側を成形用回転軸に供給される隣接する突条材
の一側水平縁部と他側水平縁部とが重合するように成形
用回転軸の外周面に対して接線方向に臨ませ、さらに、
この成形板の成形面上を移動する突条材の冷却手段とし
て成形板の成形面を投入させた水槽を配設してなること
を特徴とするものである。In addition, as a bending molding apparatus for a strip synthetic resin material formed on a ridge member, a circle whose outer peripheral edge is larger in diameter than the molding rotary shaft is located below the ridge member winding start end side of the molding rotary shaft. A forming plate having a forming surface curved in an arc shape, a cross section of the forming surface being formed in a U-shape or a V-shape, and being curved in an arc shape in a direction along the outer periphery of the forming rotary shaft. It is arranged, the base end side of the molding plate is directed to the introduction side of the band-shaped synthetic resin material, and the front end side of one side horizontal edge portion of the adjacent ridge supplied to the molding rotary shaft and the other side horizontal edge. Face the outer peripheral surface of the rotating shaft for molding in a tangential direction so that the edges overlap, and further,
A water tank into which the molding surface of the molded plate is put is provided as a cooling means of the ridge member moving on the molding surface of the molded plate.
この屈曲成形装置において、成形用回転軸に近接する
成形板の先端部に、突条材を摺接案内する彎曲面が該成
形板の曲げ半径よりも小さく形成された調整板を配設し
てもよく、さらに、この調整板に適宜な加熱機構を内蔵
させておいてもよい。In this bending molding apparatus, an adjusting plate having a curved surface that guides the ridge material in sliding contact with the curved surface smaller than the bending radius of the molding plate is provided at the tip of the molding plate that is close to the molding rotation shaft. Alternatively, a suitable heating mechanism may be incorporated in this adjusting plate.
半溶融状態の帯状合成樹脂材を成形用回転軸に螺旋状
に巻回させる前に、水槽内に配設した外周縁が成形用回
転軸よりも大径の円弧状に彎曲した成形面に形成してい
る成形板に向かって供給してこの成形板の成形面に被覆
させながら該成形面に沿って移動させることにより、形
成すべき合成樹脂螺旋管の彎曲方向に連続的に屈曲させ
ると共に、両端に水平縁部を有し且つ上部が開口した断
面U字状ないしV字状の基体部からなる突条材に成形
し、この突条材を水槽内に通過中に該合成樹脂材の軟化
温度よりもやや低い温度に冷却させるものであるから、
突条材は内外面から冷却水により効率よく均一に冷却さ
れ、突条材が変形する虞れのない安定した形状を維持し
ながら成形用回転軸に供給されると共にその供給時に適
度に彎曲しているので、成形用回転軸上に対する巻回が
容易且つ円滑に行え、さらに、成形用回転軸上で螺旋状
に巻回して隣接する突条材の対向側部間に半溶融状態の
合成樹脂材を介在させた際に、この半溶融状態の合成樹
脂材が突条材によって冷却作用を受けて硬化が促進さ
れ、該合成樹脂材を介して突条材間を直ちに一体化させ
ながら螺旋突条を形成していくものである。Before the semi-molten band-shaped synthetic resin material is spirally wound around the molding rotary shaft, the outer peripheral edge placed in the water tank is formed on the molding surface curved in an arc shape with a larger diameter than the molding rotary shaft. By moving along the forming surface while supplying the material toward the forming plate and covering the forming surface of the forming plate, the material is continuously bent in the curved direction of the synthetic resin spiral tube to be formed, It is formed into a ridge having a base portion having a horizontal edge at both ends and having an open top and a U-shaped or V-shaped cross section, and the synthetic resin is softened while passing through the ridge in a water tank. Because it cools to a temperature slightly lower than the temperature,
The ridges are efficiently and uniformly cooled by cooling water from the inner and outer surfaces, and are supplied to the forming rotary shaft while maintaining a stable shape without the risk of deformation of the ridges, and are appropriately curved at the time of the supply. Therefore, winding on the forming rotary shaft can be easily and smoothly performed, and furthermore, the synthetic resin in a semi-molten state between the opposing side portions of the adjacent ridge members wound spirally on the forming rotary shaft. When the material is interposed, the synthetic resin material in the semi-molten state is cooled by the ridges to accelerate the curing, and the ridges are immediately integrated with the ridges via the synthetic resin. Articles are formed.
この時、突条材の対向側部間に介在させる半溶融状態
の合成樹脂材として、該突条材の幅よりも大きい幅を有
する帯状合成樹脂材を使用すると、該帯状合成樹脂材が
内管となる二重管を製造することができ、紐状ないしは
細幅帯状の合成樹脂材を使用すると、突条材の内面が管
の内壁面となる合成樹脂螺旋管を製造することができ
る。At this time, when a band-shaped synthetic resin material having a width larger than the width of the ridge member is used as the semi-molten synthetic resin material interposed between the opposed side portions of the ridge member, the band-shaped synthetic resin material is When a double tube as a tube can be manufactured, and a string-shaped or narrow band-shaped synthetic resin material is used, a synthetic resin spiral tube in which the inner surface of the ridge member becomes the inner wall surface of the tube can be manufactured.
又、半溶融状態の帯状合成樹脂材を上記のような突条
材に屈曲成形するには、水槽内に配設した外周縁が成形
用回転軸よりも大径の円弧状に彎曲した成形面に形成し
ている成形板の成形面に該帯状合成樹脂材を被覆させな
がら該成形面に沿って移動させることによって行われ、
突条材はこの成形板の通過中に、外面は勿論のこと、基
体部が上部が開口した断面U字状ないしV字状であるの
で、該開口部を通じて冷却水により内面も外面と同様に
効率よく冷却されて該成形板の先端から成形用回転軸へ
と供給される。Further, in order to bend the semi-molten belt-like synthetic resin material into the ridge member as described above, the outer peripheral edge provided in the water tank has a molding surface curved in an arc shape having a larger diameter than the molding rotary shaft. It is performed by moving along the molding surface while covering the molding surface of the molding plate being formed with the band-shaped synthetic resin material,
During the passage of the molded plate, the ridge material has a U-shaped or V-shaped cross-section with an open top, not to mention the outer surface, so that the inner surface is cooled by cooling water through the opening as well as the outer surface. It is cooled efficiently and supplied to the forming rotary shaft from the tip of the formed plate.
この際、成形板の先端部に、突条材を摺接案内する彎
曲面が該成形板の曲げ半径よりも小さく形成された調整
板を配設しておくことによって成形板から成形用回転軸
への突条材の巻付けが一層円滑に行われ、又、この調整
板に適宜な加熱機構を内蔵させておくことによって、突
条材を巻回や溶着に最適な温度に調整したのち成形回転
軸に供給することができる。At this time, an adjusting plate having a curved surface which guides the ridge member in sliding contact and formed to be smaller than the bending radius of the formed plate is disposed at the tip end of the formed plate. The ridges are wound more smoothly, and the adjustment plate is equipped with an appropriate heating mechanism so that the ridges can be adjusted to the optimum temperature for winding and welding and then formed. Can be supplied to the rotating shaft.
本発明の実施例を図面について説明すると、(1)は
成形用回転軸で、複数本の円筒状軸(1a)(1a)・・・
(1a)を同心円上に所定間隔ごとに配設してこれらの円
筒状軸(1a)の一端部側を機枠(16)に回転自在に支持
させると共に適宜な回転駆動機構(図示せず)を介して
同一方向に一斉に回転させられるように構成してなるも
のである。The embodiment of the present invention will be described with reference to the drawings. (1) is a rotary shaft for molding, and a plurality of cylindrical shafts (1a) (1a)...
(1a) are arranged at predetermined intervals on a concentric circle, and one end side of these cylindrical shafts (1a) is rotatably supported by the machine frame (16), and an appropriate rotation drive mechanism (not shown) , So that they can be simultaneously rotated in the same direction.
なお、成形用回転軸(1)を構成するこれらの複数本
の円筒状軸(1a)は、中心に配した軸(2)にその両端
部をリンク(3)(4)を介して支持させ、このリンク
(3)(4)を軸(2)を支点として適宜な機構を介し
回動させることにより成形回転軸(1)の径を形成すべ
き合成樹脂螺旋管Bの径に応じて拡縮させるように構成
しておいてもよく、又、成形用回転軸(1)を一本の回
転軸によって形成するか、或いは表面に多数個の回転ロ
ーラを巻取り方向に並列させた状態に設けた軸体より構
成したものであってもよい。The plurality of cylindrical shafts (1a) constituting the forming rotary shaft (1) are supported at both ends by a center shaft (2) via links (3) and (4). By rotating the links (3) and (4) about the shaft (2) as a fulcrum through an appropriate mechanism, the diameter of the molding rotary shaft (1) is expanded or contracted according to the diameter of the synthetic resin spiral tube B to be formed. The molding rotating shaft (1) may be formed by one rotating shaft, or a plurality of rotating rollers may be provided on the surface in a state of being arranged in parallel in the winding direction. It may be constituted by a shaft body.
(5)は成形用回転軸(1)の巻取り始端部側の下方
に配設した屈曲成形装置を構成する成形板で、一部を切
欠除去したドーナツ形状に形成され、その切欠一端部を
この端部に対して接線方向の斜め上方に配設した帯状合
成樹脂材(A1)の押出成形手段のノズル(6)に指向さ
せると共に切欠他端部を成形用回転軸(1)の外周面に
対して接線方向に臨ませた状態にして機枠(16)等に固
定されてある。(5) is a forming plate which constitutes a bending forming device disposed below the winding start end side of the forming rotary shaft (1), and is formed into a donut shape with a part of the cutout removed, and the cutout one end is formed. the outer periphery of the belt-like synthetic resin material which is disposed obliquely above the tangential to the ends (a 1) of the extrusion means of the nozzle (6) forming a rotational axis a cut other end with directing (1) It is fixed to the machine frame (16) or the like in a state where it faces tangentially to the surface.
この成形板(5)の外周縁は、成形用回転軸(1)よ
りも大径の円弧状に彎曲していると共にその両側面を適
宜幅だけ切除して一定幅と一定高さを有する断面U字状
の成形面(7)に形成されてあり、さらに周方向に適宜
間隔毎に、この成形面(7)の外周端面から成形面
(7)の高さよりも大きく切除した切欠部(8)を設け
てある。The outer peripheral edge of the forming plate (5) is curved in an arc shape having a diameter larger than that of the forming rotary shaft (1), and both sides thereof are cut off by an appropriate width to have a cross section having a constant width and a constant height. A notch (8) formed on a U-shaped molding surface (7) and further cut from the outer peripheral end surface of the molding surface (7) at an appropriate interval in the circumferential direction so as to be larger than the height of the molding surface (7). ) Is provided.
(9)は成形板(5)の切欠他端部、即ち、先端部に
装着した調整板で、厚さが成形板(5)の成形面(7)
の厚みに等しく形成されてあり、その外周面側を成形板
(5)の成形面(7)に連なる下端から成形用回転軸
(1)の外周面に近接する上端に向かって徐々に成形面
(7)の外径から成形用回転軸(1)の外径近くにまで
変化する彎曲面(10)に形成されてある。(9) is an adjusting plate attached to the other end of the cutout of the forming plate (5), that is, the tip, and the forming surface (7) of the forming plate (5) has a thickness.
Of the forming plate (5) from the lower end connected to the forming surface (7) to the upper end close to the outer circumferential surface of the forming rotary shaft (1). It is formed on a curved surface (10) that changes from the outer diameter of (7) to near the outer diameter of the molding rotary shaft (1).
この調整板(9)は下端部を成形板(5)の端部に穿
設した嵌合溝部(11)に嵌合して着脱自在に取付けられ
てあり、形成すべき合成樹脂螺旋管(B)の径、即ち、
成形用回転軸(1)の径に応じた彎曲面(10)を有する
別な調整板と取り替え可能となっている。The adjusting plate (9) has a lower end fitted into a fitting groove (11) formed in the end of the molding plate (5) and is detachably attached, and a synthetic resin spiral tube (B) to be formed. ), Ie
It can be replaced with another adjusting plate having a curved surface (10) corresponding to the diameter of the forming rotary shaft (1).
(12)はこの調整板(9)に内蔵したヒータ等の加熱
機構である。なお、このような加熱手段としては、外部
からの温風の吹きつけ等を採用してもよい。(12) is a heating mechanism such as a heater built in the adjusting plate (9). It should be noted that as such heating means, blowing of warm air from the outside or the like may be adopted.
(13)は成形板(5)の両端部以外の部分を没入させ
た水槽で、成形板(5)の成形面(7)を摺動する帯状
合成樹脂材(A1)で形成した突条材(A2)を冷却するも
のである。(13) is a water tank in which portions other than both ends of the molded plate (5) are immersed, and a ridge formed of a belt-shaped synthetic resin material (A 1 ) sliding on the molding surface (7) of the molded plate (5). It cools the material (A 2 ).
(14)は成形用回転軸(1)に半溶融状態の合成樹脂
材(C)を供給するための押出成形手段のノズルであ
る。Reference numeral (14) is a nozzle of extrusion molding means for supplying the semi-molten synthetic resin material (C) to the molding rotary shaft (1).
このように構成した装置を使用して合成樹脂螺旋管
(B)を製造するには、ノズル(6)から成形板(5)
の成形面(7)の幅よりも幅広い一定幅を有する平帯状
合成樹脂材(A1)を平帯のまゝ、或いは成形板(5)の
成形面(7)に沿う形状にして押し出しながら、該帯状
合成樹脂材(A1)を成形板(5)の成形用回転軸よりも
大径の円弧状に彎曲した成形面に被覆させながら該成形
面に沿って移動させることにより突条材(A2)に成形
し、この突条材(A2)を該成形板(5)から成形用回転
軸(1)にこの成形用回転軸(1)の回転によって螺旋
状に巻回させていくことにより製造されるものである
が、この製造方法を以下に詳しく述べる。In order to manufacture the synthetic resin spiral tube (B) using the apparatus configured as described above, it is necessary to form the molded plate (5) from the nozzle (6).
While extruding a flat-belt-shaped synthetic resin material (A 1 ) having a constant width wider than the width of the molding surface (7) of ( 1 ) in the shape of a flat belt or the molding surface (7) of the molding plate (5) A strip-shaped synthetic resin material (A 1 ) is moved along the molding surface of the molding plate (5) while covering the molding surface of the molding plate (5) curved in an arc shape having a diameter larger than that of the molding shaft. (A 2 ), and this ridge (A 2 ) is spirally wound from the forming plate (5) to the forming rotary shaft (1) by the rotation of the forming rotary shaft (1). The production method will be described in detail below.
まずノズル(6)から例えば、ポリエチレン樹脂、ポ
リプロピレン樹脂等のポリオレフィン系の硬質合成樹脂
からなる半溶融状態の帯状合成樹脂材(A1)を成形材
(5)の成形面(7)に供給すると、該帯状合成樹脂材
(A1)が成形板(5)の成形面(7)を被覆しながら、
成形面(7)によりその形状を保持されつつ移動する。First, for example, when a semi-molten band-shaped synthetic resin material (A 1 ) made of a hard synthetic polyolefin resin such as polyethylene resin or polypropylene resin is supplied from the nozzle (6) to the molding surface (7) of the molding material (5). While the strip-shaped synthetic resin material (A 1 ) covers the molding surface (7) of the molding plate (5),
It moves while keeping its shape by the molding surface (7).
この時、帯状合成樹脂材(A1)が平帯状態のまゝ成形
板(5)に供給する場合には、成形板(5)の成形面
(7)にローラ(図示せず)を対応させて配設してお
き、このローラで帯状合成樹脂材(A1)を屈曲させて成
形面(7)の端面から両側面に押し付けながら成形すれ
ばよいが、予め、ノズル(6)によって帯状合成樹脂材
(A1)を成形板(5)の成形面(7)に沿う形状として
押し出しながら、成形面(7)に供給する方が望まし
い。At this time, when the belt-shaped synthetic resin material (A 1 ) is supplied to the molding plate (5) in a flat band state, a roller (not shown) is used for the molding surface (7) of the molding plate (5). The belt-shaped synthetic resin material (A 1 ) may be bent by this roller and molded while pressing from the end surface of the molding surface (7) to both side surfaces. It is desirable to supply the synthetic resin material (A 1 ) to the molding surface (7) while extruding the synthetic resin material (A 1 ) in a shape along the molding surface (7) of the molding plate (5).
こうして成形板(5)の成形面(7)に供給される帯
状合成樹脂材(A1)は、その両側縁部が成形面(7)と
成形板(5)の外周端間で形成された段周部(15)に摺
接して水平縁部(a1)(a2)となった断面U字状の突条
材(A2)に成形、保持されると共にこの突条材(A2)が
成形面(7)に摺動しながら水槽(13)中を通過して調
整板(9)に至る。この間に、水槽内の冷却水によっ
て、突条材(A2)は外面は勿論のこと、内面を基体部の
開口部を通じて、その樹脂の軟化温度よりもやや低い温
度に冷却され、その形状を保持すると共に成形面(7)
に沿って長さ方向に彎曲した状態に形成される。In this way, the strip-shaped synthetic resin material (A 1 ) supplied to the molding surface (7) of the molding plate (5) has its both side edges formed between the molding surface (7) and the outer peripheral edge of the molding plate (5). horizontal edge in sliding contact with the stepped peripheral portion (15) (a 1) ( a 2) and became a U-like lip material forming the (a 2), this projection member is held (a 2 ) Slides on the forming surface (7) and passes through the water tank (13) to reach the adjusting plate (9). During this time, the ridges (A 2 ) are cooled to a temperature slightly lower than the softening temperature of the resin by the cooling water in the water tank through the opening of the base portion, not to mention the outer surface of the ridge member (A 2 ). Hold and molding surface (7)
Is formed in a state of being curved in the longitudinal direction along with.
この際、成形板(5)の外周部複数個所に設けた切欠
部(8)によって基体部の開口部を通じて突条材(A2)
がその内面側からも冷却され、全長に亘って均一且つ迅
速な冷却作用を受けて調整板(9)に達する。At this time, the notch (8) provided at a plurality of locations on the outer peripheral portion of the forming plate (5) allows the ridge (A 2 ) to pass through the opening of the base.
Is also cooled from its inner surface side, and reaches the adjusting plate (9) by being subjected to uniform and rapid cooling action over the entire length.
さらに、この調整板(9)の彎曲面(10)を突条材
(A2)が通過中に、該突条材(A2)がさらに形崩れが生
じることなく彎曲させられると共に加熱機構(12)によ
って軟化温度よりやゝ低い一定の温度に正確に調整され
たのち、成形用回転軸(1)に螺旋状に巻き取られる。Further, while the ridge member (A 2 ) passes through the curved surface (10) of the adjusting plate (9), the ridge member (A 2 ) is curved without further deformation and the heating mechanism (A 2 ). After being precisely adjusted to a constant temperature slightly lower than the softening temperature by 12), it is spirally wound around the forming rotary shaft (1).
成形用回転軸(1)上においては、先行する突条材
(A2)の一側水平縁部(a1)上に次に巻回する突条材
(A2)の他側水平縁部(a2)が重合するように螺旋状に
巻き付けられるものであるが、この時、ノズル(14)か
ら半溶融状態の合成樹脂材(C)がこれらの水平縁部
(a1)(a2)間に供給され、水平縁部(a1)(a2)によ
ってサンドイッチ状に挟まれた状態で溶着、一体化しな
がら螺旋状に巻回していく。In the molding rotary shaft (1), the other side a horizontal edge of the one side horizontal edges of the preceding ridge material (A 2) (a 1) ridge then wound onto material (A 2) (A 2 ) is spirally wound so as to be polymerized, and at this time, the semi-molten synthetic resin material (C) is discharged from the nozzle (14) at these horizontal edges (a 1 ) (a 2 ), And is welded in a state of being sandwiched by the horizontal edges (a 1 ) (a 2 ) and wound into a spiral while being integrated.
この時、半溶融状態の合成樹脂材(C)が水平縁部
(a1)(a2)材によって冷却作用を受けて硬化が促進さ
れ、前記溶着、一体化が短時間で急速に行われて突条材
(A2)により螺旋突条(A3)を形成しながら合成樹脂螺
旋管(B)が連続的に製造されるものである。At this time, the synthetic resin material (C) in the semi-molten state is cooled by the horizontal edge portions (a 1 ) and (a 2 ) to accelerate the curing, and the welding and integration are rapidly performed in a short time. ridge member Te synthetic resin spiral tube while forming a spiral ridge (A3) by (a 2) (B) in which are continuously produced.
この製造方法において、上記半溶融状態の合成樹脂材
(C)として突条材(A2)の水平縁部(a1)(a2)間の
幅よりもやや大なる幅を有する平帯状のものをノズル
(14)から押し出し、第3図に示すように、該半溶融状
態の合成樹脂材(C)の一側縁部を先行する突条材
(A2)の一側水平縁部(a1)と次に巻回する突条材
(A2)の他側水平縁部(a2)間に挟着一体化させると共
に他側縁部上に該突条材(A2)の一側水平縁部(a1)を
重合溶着させれば、成形用回転軸(1)上に螺旋状に巻
回するこの平帯状合成樹脂材(C)によって合成樹脂螺
旋管(B)の平坦な内周壁面が形成された二重管を得る
ことができる。In this manufacturing method, as the semi-molten synthetic resin material (C), a flat strip having a width slightly larger than the width between the horizontal edges (a 1 ) (a 2 ) of the ridge material (A 2 ). One is pushed out from the nozzle (14) and, as shown in FIG. 3, one side edge of the ridge (A 2 ) preceding the one side edge of the semi-molten synthetic resin material (C) ( a 1) and the next ridge member of winding (a 2) of the other side horizontal edges (a 2) projecting strip material on the other side edge portion with is sandwiched integrally between (a 2) one When the side horizontal edge (a 1 ) is polymerized and welded, the flat band-shaped synthetic resin material (C) spirally wound on the forming rotary shaft (1) makes the synthetic resin spiral tube (B) flat. A double pipe having an inner peripheral wall surface can be obtained.
又、上記半溶融状態の合成樹脂材(C)として突条材
(A2)の水平縁部(a1)(a2)の幅に略等しい紐状のも
のをノズル(14)から押し出し、第4図に示すように、
該紐状合成樹脂材(C)を先行する突条材(A2)の一側
水平縁部(a1)と次に巻回する突条材(A2)の他側水平
縁部(a2)間に挟着一体化させれば、突条材(A2)によ
って形成される螺旋突条(A3)の内面が管の内壁面とな
った単管が製造される。Also, as the semi-solid synthetic resin material (C), a string-like material substantially equal in width to the horizontal edges (a 1 ) (a 2 ) of the ridge member (A 2 ) is extruded from the nozzle (14), As shown in FIG.
One side horizontal edge (a 1 ) of the ridge member (A 2 ) preceding the string-shaped synthetic resin material (C) and the other horizontal edge portion (a) of the ridge member (A 2 ) to be wound next if brought into clamped integrated between 2), a single tube inner surface of the spiral ridge (A3) becomes the inner wall surface of the tube formed by the ridge member (a 2) is produced.
なお、ノズル(14)から押し出される合成樹脂材
(C)は、突条材(A2)と同一合成樹脂材であっても、
異質の合成樹脂材であってもよい。In addition, even if the synthetic resin material (C) extruded from the nozzle (14) is the same synthetic resin material as the ridge material (A 2 ),
A different kind of synthetic resin material may be used.
又、上記実施例における成形板(5)の成形面(7)
は、成形板(5)の外周端面によって形成したが、第7
図及び第8図に示すように、成形板(5)の円弧状外周
部に適宜間隔毎に円形ロール(17)(17)・・・(17)
を回転自在に軸支し、これらのロール(17)の周面及び
両側面によって上記と同様な突条材(A2)の成形面
(7)に形成すると共に軸(18)によって突条材(A2)
の水平縁部(a1)(a2)を形成させるようにしてもよ
い。この場合、調整板(9)はロール(17)の延長上に
配設されるのは勿論である。又、円形ロール(17)(1
7)・・・(17)の両側部を小径に形成してその外周面
で突条材(A2)の水平縁部(a1)(a2)を形成させるよ
うにしてもよい。The molding surface (7) of the molding plate (5) in the above embodiment
Is formed by the outer peripheral end surface of the molded plate (5),
As shown in FIG. 8 and FIG. 8, circular rolls (17) (17)... (17) are formed on the arc-shaped outer peripheral portion of the forming plate (5) at appropriate intervals.
Is rotatably supported by a shaft, and the peripheral surface and both side surfaces of the roll (17) form a molding surface (7) of the same ridge (A 2 ) as described above, and the shaft (18) forms a ridge. (A 2)
The horizontal edges (a 1 ) (a 2 ) of the above may be formed. In this case, the adjusting plate (9) is, of course, disposed on an extension of the roll (17). In addition, circular roll (17) (1
7) ... Both sides of (17) may be formed to have a small diameter, and the horizontal edges (a 1 ) (a 2 ) of the ridges (A 2 ) may be formed on the outer peripheral surfaces thereof.
さらに、このような成形板(5)の成形面を断面U字
状に形成しているが、このような断面形状以外のV字状
等の適宜な山形形状に形成しておけばよい。Further, the forming surface of such a forming plate (5) is formed in a U-shaped cross section, but may be formed in an appropriate mountain shape such as a V-shape other than such a cross-sectional shape.
以上のように本発明の合成樹脂管の製造方法によれ
ば、半溶融状態の帯状合成樹脂材を成形用回転軸に螺旋
状に巻回させる前に、水槽内に配設した外周縁が成形用
回転軸よりも大径の円弧状に彎曲した成形面に形成して
いる成形板に向かって供給してこの成形板の成形面に被
覆させながら該成形面に沿って移動させることにより、
形成すべき合成樹脂螺旋管の彎曲方向に連続的に屈曲さ
せると共に、両端に水平縁部を有し且つ上部が開口した
断面U字状ないしV字状の基体部からなる突条材に成形
し、この突条材を水槽内を通過中に該合成樹脂材の軟化
温度よりもやや低い温度に冷却するものであるから、突
条材の外面は勿論のこと、内面も基体部に設けられた開
口部を通じて冷却水により効率よく冷却されて、突条材
は全体として均一に冷却され、突条材が変形する虞れの
ない安定した形状で且つその肉厚を一体化した状態に保
持しながら成形用回転軸に供給することができ、その供
給時に適度に彎曲しているので、成形用回転軸上に対す
る巻回が容易且つ円滑に行えるものであり、さらに、成
形用回転軸上で螺旋状に巻回して隣接する突条材の対向
側部間に半溶融状態の合成樹脂材を介在させた際に、こ
の半溶融状態の合成樹脂材が突条材によって冷却作用を
受けて硬化が促進され、該合成樹脂材を介して突条材間
が直ちに溶着一体化して突条材による螺旋突条が整然と
形成することができ、精度のよい合成樹脂螺旋間を能率
よく製造することができるものである。As described above, according to the synthetic resin pipe manufacturing method of the present invention, the outer peripheral edge provided in the water tank is formed before the semi-molten band-shaped synthetic resin material is spirally wound around the forming rotary shaft. By feeding toward the forming plate formed on the forming surface curved in a circular arc having a diameter larger than that of the rotating shaft for coating and moving the forming surface of the forming plate while covering the forming surface,
It is bent continuously in the curved direction of the synthetic resin helical tube to be formed, and is formed into a ridge member having a U-shaped or V-shaped cross section with horizontal edges at both ends and an open top. Since the ridge material is cooled to a temperature slightly lower than the softening temperature of the synthetic resin material while passing through the water tank, the inner surface as well as the outer surface of the ridge material is provided on the base portion. Cooled efficiently by the cooling water through the opening, the ridge member is uniformly cooled as a whole, and has a stable shape without the risk of deformation of the ridge member and while maintaining its thickness integrated. It can be supplied to the molding rotary shaft, and is appropriately curved at the time of the supply, so that the winding on the molding rotary shaft can be easily and smoothly performed, and further, the spiral shape is formed on the molding rotary shaft. It is wound in a semi-molten state between the opposite sides of the adjacent strips. When the synthetic resin material is intervened, the semi-molten synthetic resin material is cooled by the ridge material to promote hardening, and the ridge materials are immediately welded and integrated via the synthetic resin material. As a result, the spiral ridges formed by the ridge material can be formed in an orderly manner, and highly accurate synthetic resin spirals can be efficiently manufactured.
さらに、突条材の対向側部間に介在させる半溶融状態
の合成樹脂材として、該突条材の幅よりも大きい幅を有
する帯条合成樹脂材を使用すると、該帯状合成樹脂材が
内管となる二重管を製造することができ、紐状ないしは
細幅帯状の合成樹脂材を使用すると、突条材の内面が管
の内壁面となる合成樹脂螺旋管を製造することができ
る。Further, when a strip synthetic resin material having a width larger than the width of the strip material is used as the semi-molten synthetic resin material interposed between the opposite side portions of the strip material, the strip synthetic resin material is A double pipe to be a pipe can be manufactured, and when a string-shaped or narrow strip-shaped synthetic resin material is used, it is possible to manufacture a synthetic resin spiral tube in which the inner surface of the ridge material serves as the inner wall surface of the tube.
又、半溶融状態の帯状合成樹脂材を上記のような突条
材に屈曲成形する装置としては、成形用回転軸の突条材
巻込始端部側の下方に、外周縁の一部が成形用回転軸よ
りも大径の円弧状に彎曲した成形面とされ、且つ該成形
面の断面がU字状ないしはV字状に形成されると共に、
該成形用回転軸の外周に沿う方向に円弧状に彎曲してな
る成形板を配設し、該成形板の基端側を帯状合成樹脂材
の導入側に指向させると共に、先端側を成形用回転軸に
供給される隣接する突条材の一側水平縁部と他側水平縁
部とが重合するように成形用回転軸の外周面に対して接
線方向に臨ませ、さらに、この成形板の成形面上を移動
する突条材の冷却手段として成形板の成形面を没入させ
た水槽を配設してなるものであるから、この成形板の成
形面によって半溶融状態の帯状合成樹脂材を正確な形状
の突条材に成形すると共に内外面から冷却水により効率
よく均一に冷却しつつ適度に彎曲させながらその先端か
ら成形用回転軸に円滑に導入させることができるもので
ある。Further, as an apparatus for bending and molding a semi-molten band-shaped synthetic resin material into a ridge material as described above, a part of the outer peripheral edge is formed below the ridge material winding start end side of the molding rotary shaft. A forming surface curved in an arc shape having a diameter larger than that of the rotary shaft for use, and a cross section of the forming surface is formed in a U-shape or a V-shape;
A forming plate which is curved in an arc shape in a direction along the outer periphery of the forming rotary shaft is provided, and a base end side of the forming plate is directed to an introduction side of the belt-shaped synthetic resin material, and a tip end side is formed. The one side horizontal edge and the other side horizontal edge of the adjacent ridges supplied to the rotary shaft face tangentially to the outer peripheral surface of the rotary shaft for molding so that the horizontal edge of the other side overlaps. Since a water tank in which the molding surface of the molding plate is immersed is arranged as a cooling means for the ridge material moving on the molding surface of the strip-shaped synthetic resin material in a semi-molten state by the molding surface of the molding plate. Can be formed into a ridge member having an accurate shape, and can be smoothly introduced from the front end thereof to the forming rotary shaft while being appropriately curved while being efficiently and uniformly cooled by cooling water from the inner and outer surfaces.
さらに、この成形板によって成形される突条材は、成
形板を通過中に水槽からなる冷却手段によって適度に硬
化させられて、形崩れの発生をなくすることができると
共に、上記した成形用回転軸上でを溶着一体化を促進さ
せることができる。Further, the ridge member formed by this forming plate can be appropriately hardened by the cooling means composed of the water tank while passing through the forming plate to prevent the occurrence of shape deformation, and at the same time, the above-mentioned forming rotary member. Welding and integration on the shaft can be promoted.
この際、成形板の先端部に、突条材を摺接案内する彎
曲面が該成形板の曲げ半径よりも小さく形成された調整
板を配設しておくことによって成形板から成形用回転軸
への突条材の巻付けが一層円滑に行われ、又、この調整
板に適宜な加熱機構を内蔵させておくことによって、突
条材を巻回や溶着に最適な温度に調整したのち成形用回
転軸に供給することができるものである。At this time, an adjusting plate having a curved surface which guides the ridge member in sliding contact and formed to be smaller than the bending radius of the formed plate is disposed at the tip end of the formed plate. The ridges are wound more smoothly, and the adjustment plate is equipped with an appropriate heating mechanism so that the ridges can be adjusted to the optimum temperature for winding and welding and then formed. It can be supplied to the rotary shaft.
図面は本発明の実施例を示すもので、第1図は製造装置
の簡略平面図、第2図は簡略正面図、第3図は成形用回
転軸上で製造される合成樹脂螺旋管の一部断面図、第4
図はその別な構造の合成樹脂螺旋管の一部断面図、第5
図は屈曲成形装置の正面図、第6図はその側面図、第7
図は屈曲成形装置の別な例を示す正面図、第8図はその
側面図である。 (1)……成形用回転軸、(5)……成形板、(6)…
…ノズル、(7)……成形面、(9)……調整板、(1
0)……彎曲面、(12)……加熱機構、(13)……水
槽、(14)……ノズル、(A1)……帯状合成樹脂材、
(A2)……突条材、(B)……合成樹脂螺旋管、(C)
……合成樹脂材、(a1)(a2)……水平縁部。The drawings show an embodiment of the present invention. FIG. 1 is a simplified plan view of a manufacturing apparatus, FIG. 2 is a simplified front view, and FIG. 3 is an example of a synthetic resin spiral tube manufactured on a rotary shaft for molding. Partial sectional view, fourth
The figure is a partial cross-sectional view of a synthetic resin spiral tube having another structure, and FIG.
FIG. 6 is a front view of the bending apparatus, FIG. 6 is a side view thereof, and FIG.
FIG. 8 is a front view showing another example of the bending apparatus, and FIG. 8 is a side view thereof. (1) ... Rotating shaft for molding, (5) ... Molding plate, (6) ...
... Nozzle, (7) ... Molding surface, (9) ... Adjustment plate, (1
0) ...... curved surface, (12) ...... heating mechanism, (13) …… water tank, (14) …… nozzle, (A 1 ) …… band-shaped synthetic resin material,
(A 2 ) ... ridge material, (B) ... synthetic resin spiral tube, (C)
…… Synthetic resin material, (a 1 ) (a 2 ) …… Horizontal edge.
Claims (6)
配設した外周縁が成形用回転軸よりも大径の円弧状に彎
曲した成形面に形成している成形板に向かって供給して
この成形板の成形面に被覆させながら該成形面に沿って
移動させることにより、形成すべき合成樹脂螺旋管の彎
曲方向に連続的に屈曲させると共に、両端に水平縁部を
有し且つ上部が開口した断面U字状ないしV字状の基体
部からなる突条材に成形し、この突条材を水槽内を通過
中に該合成樹脂材の軟化温度よりもやや低い温度に冷却
したのち、成形用回転軸に、隣接する突条材の一側水平
縁部と他端水平縁部とが重合するべく連続供給して該成
形用回転軸上に螺旋状に巻回すると共に隣接する突条材
の重合された水平縁部の対向側部間に半溶融状態の合成
樹脂材を介在させることによってこの合成樹脂材により
一体化させながら螺旋突条を形成していくことを特徴と
する合成樹脂螺旋管の製造方法。1. A semi-molten belt-shaped synthetic resin material is directed toward a molding plate having an outer peripheral edge disposed in a water tank formed on an arc-shaped molding surface having a larger diameter than a molding rotary shaft. By feeding and moving along the molding surface of the molding plate while covering the molding surface, the synthetic resin spiral tube is continuously bent in the bending direction and has horizontal edges at both ends. In addition, a ridge material having a U-shaped or V-shaped base portion with an open top is formed, and the ridge material is cooled to a temperature slightly lower than the softening temperature of the synthetic resin material while passing through the water tank. After that, one side horizontal edge portion and the other end horizontal edge portion of the adjacent ridge member are continuously supplied to the forming rotary shaft so as to be superimposed, and are spirally wound on the forming rotary shaft and adjacent to the forming rotary shaft. A semi-molten synthetic resin material is interposed between the opposite side portions of the horizontal edges where the ridges are overlapped. Method for producing a synthetic resin helical tube, characterized in that continue to form a spiral ridge while integrated by the synthetic resin material by.
態の合成樹脂材は、該突条材の幅よりも大きい幅を有す
る帯状合成樹脂材であって、この帯状合成樹脂材により
管の内壁を形成することを特徴とする請求項記載の合
成樹脂螺旋管の製造方法。2. The synthetic resin material in a semi-molten state interposed between opposing side portions of the ridge member is a band-like synthetic resin member having a width larger than the width of the ridge member. The method for manufacturing a synthetic resin spiral tube according to claim 1, wherein the inner wall of the tube is formed by the following.
態の合成樹脂材は、紐状ないしは細幅帯状の合成樹脂材
であって、この合成樹脂材を管の内面側に露出させるこ
となく突条材の内面を管の内壁面とすることを特徴とす
る請求項記載の合成樹脂螺旋管の製造方法。3. The semi-molten synthetic resin material interposed between the opposite side portions of the ridge material is a string-shaped or narrow strip-shaped synthetic resin material, and the synthetic resin material is exposed on the inner surface side of the pipe. The method for producing a synthetic resin spiral tube according to claim 1, wherein the inner surface of the ridge material is used as the inner wall surface of the tube without causing it.
に、外周縁が成形用回転軸よりも大径の円弧状に彎曲し
た成形面とされ、且つ該成形面の断面がU字状ないしは
V字状に形成されると共に、該成形用回転軸の外周に沿
う方向に円弧状に彎曲してなる成形板を配設し、該成形
板の基端側を帯状合成樹脂材の導入側に指向させると共
に、先端側を成形用回転軸に供給される隣接する突条材
の一側水平縁部と他側水平縁部とが重合するように成形
用回転軸の外周面に対して接線方向に臨ませ、さらに、
この成形板の成形面上を移動する突条材の冷却手段とし
て成形板の成形面を突入させた水槽を配設してなること
を特徴とする帯状合成樹脂材の屈曲成形装置。4. A molding surface whose outer peripheral edge is curved in an arc shape having a diameter larger than that of the molding rotary shaft, and which is below the projecting strip winding start end side of the molding rotary shaft, and which has a cross section. Is formed in a U-shape or a V-shape, and a molding plate formed by curving in an arc shape in the direction along the outer periphery of the molding rotation shaft is provided, and the base end side of the molding plate is a belt-shaped synthetic resin. The outer peripheral surface of the forming rotary shaft so that the one side horizontal edge and the other side horizontal edge of the adjacent ridges supplied to the forming rotary shaft are superimposed while being directed to the material introduction side. Face tangentially to
A bending molding apparatus for a belt-shaped synthetic resin material, characterized in that a water tank having the molding surface of the molding plate inserted therein is provided as a cooling means for the ridge material moving on the molding surface of the molding plate.
に、突条材を摺接案内する彎曲面が該成形板の曲げ半径
よりも小さく形成された調整板を配設したことを特徴と
する請求項記載の帯状合成樹脂材の屈曲成形装置。5. An adjusting plate having a curved surface for slidingly guiding a ridge material formed smaller than the bending radius of the forming plate is provided at the tip of the forming plate in the vicinity of the forming rotary shaft. A bending molding apparatus for a belt-shaped synthetic resin material according to claim 1.
請求項記載の帯状合成樹脂材の屈曲成形装置。6. A bending molding apparatus for a belt-shaped synthetic resin material according to claim 1, wherein an appropriate heating mechanism is incorporated in the adjusting plate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20714788A JP2608769B2 (en) | 1988-08-19 | 1988-08-19 | Synthetic resin spiral tube manufacturing method and bending molding apparatus used in this method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20714788A JP2608769B2 (en) | 1988-08-19 | 1988-08-19 | Synthetic resin spiral tube manufacturing method and bending molding apparatus used in this method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0255120A JPH0255120A (en) | 1990-02-23 |
JP2608769B2 true JP2608769B2 (en) | 1997-05-14 |
Family
ID=16534990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20714788A Expired - Fee Related JP2608769B2 (en) | 1988-08-19 | 1988-08-19 | Synthetic resin spiral tube manufacturing method and bending molding apparatus used in this method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2608769B2 (en) |
-
1988
- 1988-08-19 JP JP20714788A patent/JP2608769B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH0255120A (en) | 1990-02-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4689003A (en) | Apparatus for the continuous production of elongate hollow bodies | |
US4294636A (en) | Method and apparatus for making wire reinforced hose | |
WO2003070453A1 (en) | Thin rubber member producing method, rubber rolling device, and rubber rolling method | |
KR101776701B1 (en) | Stretching device for an apex filler strip and apex handling system comprising the stretching device | |
US4083838A (en) | Method of producing in a continuous operation endless toothed belts of any desired circumferential length | |
US4292113A (en) | Method and apparatus for manufacturing corrugated tubes | |
US3914147A (en) | Apparatus and method for the continuous production of wound pipes | |
JP2608769B2 (en) | Synthetic resin spiral tube manufacturing method and bending molding apparatus used in this method | |
JPH0219764B2 (en) | ||
JP2567669B2 (en) | Synthetic resin spiral tube manufacturing equipment | |
JPS5973127A (en) | Production of corrugated pipe | |
JP2683636B2 (en) | Manufacturing method of synthetic resin pipe | |
JPS62174127A (en) | Head construction of extruder | |
CA1121124A (en) | Method for manufacturing corrugated tube | |
JP4155376B2 (en) | Manufacturing method of toothed belt | |
JPH03121829A (en) | Synthetic resin tube and its manufacture | |
JP2789213B2 (en) | Manufacturing method of synthetic resin pipe | |
JPH03121828A (en) | Manufacture of synthetic resin tube and its manufacturing device | |
JPS6228735B2 (en) | ||
JPS6229212B2 (en) | ||
JPH03275215A (en) | Manufacture of corrugated pipe | |
JP3641277B2 (en) | Internal smooth corrugated pipe manufacturing equipment | |
JPH0536665Y2 (en) | ||
JP3037953B2 (en) | Manufacturing method of pressure resistant synthetic resin pipe | |
JPH02112932A (en) | Manufacture of synthetic resin pipe |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |