JP2683636B2 - Manufacturing method of synthetic resin pipe - Google Patents
Manufacturing method of synthetic resin pipeInfo
- Publication number
- JP2683636B2 JP2683636B2 JP31248988A JP31248988A JP2683636B2 JP 2683636 B2 JP2683636 B2 JP 2683636B2 JP 31248988 A JP31248988 A JP 31248988A JP 31248988 A JP31248988 A JP 31248988A JP 2683636 B2 JP2683636 B2 JP 2683636B2
- Authority
- JP
- Japan
- Prior art keywords
- forming
- synthetic resin
- belt
- molding
- endless
- 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
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
- 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〕 本発明は耐圧強度が要求される大径の電線保護管その
他の地中埋設管として使用に適した管壁外周に螺旋突条
を有する耐圧合成樹脂管の製造方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a pressure resistance having a spiral ridge on the outer circumference of a tube wall suitable for use as a large-diameter wire protection tube or other underground buried tube requiring pressure resistance. The present invention relates to a method for manufacturing a synthetic resin pipe.
この種の合成樹脂管の製造方法として、本願発明者等
は先に、成形用回転軸上に無端成形ベルトを螺旋状に巻
回して巡回運行させると共にこの無端成形ベルト上に半
溶融状態の合成樹脂帯状材を連続的に供給して該合成樹
脂帯状材を無端成形ベルトの表面形状に沿わせることに
より突条部を成形すると共に隣接する突条部の谷部間を
重合一体化させながら無端成形ベルトの進行に従って合
成樹脂管を成形して行き、この合成樹脂管の成形途上に
おいて、突条部の適所を適宜なカッターにより長さ方向
に切開して突条部内の無端成形ベルトを該切開部から外
部に導出させて元の巻回位置に巡回させ、さらに、無端
成形ベルトの除去により中空に形成された突条部の頂面
に半溶融状態の合成樹脂帯状材を連続供給して螺旋状に
巻付けることにより前記切開部を被覆することを特徴と
する合成樹脂管の製造方法を開発した。As a method of manufacturing this kind of synthetic resin pipe, the inventors of the present application firstly wound an endless molding belt on a rotating shaft for molding in a spiral manner and circulated around the endless molding belt while synthesizing a semi-molten state on the endless molding belt. An endless belt is formed by continuously supplying a resin band-shaped material and causing the synthetic resin band-shaped material to conform to the surface shape of the endless molding belt to form a ridge portion and superimpose and integrate the valley portions of the adjacent ridge portions. A synthetic resin pipe is formed as the forming belt progresses, and in the course of forming this synthetic resin pipe, an appropriate position of the ridge is cut in the longitudinal direction with an appropriate cutter to cut the endless forming belt in the ridge. From the outer part to the original winding position and circulates to the original winding position.Furthermore, the semi-molten synthetic resin strip is continuously supplied to the top surface of the ridge formed in the hollow by removing the endless molding belt, and spirally wound. By wrapping in a shape We have developed a method for manufacturing a synthetic resin tube, characterized in that coating the serial incision.
上記した合成樹脂管の製造方法によると、中空螺旋突
条を有する合成樹脂管を連続的に能率良く製造すること
ができる利点を有するものの、無端成形ベルト上に供給
する半溶融状態の合成樹脂帯状材は、該無端成形ベルト
に密着状態に被覆しない場合が生じて一定形状の螺旋突
条を連続成形することが困難であり、その上、中空の螺
旋突条部を成形したのち、該螺旋突条部の頂面に切溝を
切開してベルトを抜き取る必要があるため、ベルトの抜
き取り時に螺旋突条部に形崩れを生じさせると共にベル
ト抜き取り後の切溝を半溶融状態の合成樹脂帯状材によ
り被覆しなければならず、その際、被覆位置にズレが生
じたりして製品価値が低下するという問題点があった。According to the above-mentioned method for producing a synthetic resin pipe, although it has an advantage that a synthetic resin pipe having a hollow spiral ridge can be continuously and efficiently produced, a synthetic resin strip in a semi-molten state to be supplied onto an endless molding belt. In some cases, it is difficult to continuously form a spiral ridge of a certain shape because the material may not be covered in close contact with the endless forming belt. In addition, after forming a hollow spiral ridge, the spiral ridge is formed. Since it is necessary to cut out the kerf on the top surface of the ridge and pull out the belt, the spiral ridge is deformed when the belt is pulled out, and the kerf after the belt is pulled out is a semi-molten synthetic resin band material. Therefore, there has been a problem that the product value is lowered due to deviation of the coating position at that time.
本発明はこのような問題点を解消し、精度のよい螺旋
中空突条を有する合成樹脂管の製造方法の提供を目的と
するものである。An object of the present invention is to solve such a problem and to provide a method for manufacturing a synthetic resin pipe having a spiral hollow ridge with high accuracy.
上記目的を達成するために、本発明の合成樹脂管の製
造方法は、成形回転軸の基端部側に無端成形ベルトを導
入して成形回転軸上に該無端成形ベルトを一定のピッチ
毎に螺旋状に巻回することにより隣接する成形ベルトの
対向側面間に適宜断面形状を有する成形用空間を形成す
ると共にこの無端成形ベルトを前記成形回転軸の適所か
ら導出させて該成形回転軸の前記基端部側に運行させた
のち、再び成形回転軸上に巡回させ、この無端成形ベル
トにより形成される前記成形用空間の始端箇所に半溶融
状態の中空合成樹脂条材を該中空部に内圧をかけながら
供給することにより、該合成樹脂条材を前記成形用空間
に保持させて無端成形ベルトの螺旋移動と共に成形回転
軸上で順送すると共に成形回転軸上に接する合成樹脂条
材の内周両側端部同士を順次溶着させることにより、螺
旋状の補強突条を有する合成樹脂管を製造することを特
徴とするものである。In order to achieve the above object, the method for producing a synthetic resin pipe of the present invention is to introduce an endless molding belt on the base end side of the molding rotary shaft and to form the endless molding belt on the molding rotary shaft at a constant pitch. By forming a forming space having an appropriate cross-sectional shape between the opposing side surfaces of the adjacent forming belts by spirally winding the endless forming belt, the endless forming belt is led out from a proper place of the forming rotating shaft, and After running to the base end side, it is circulated again on the forming rotary shaft, and a semi-molten hollow synthetic resin strip is applied to the hollow part at the starting end of the forming space formed by this endless forming belt. Of the synthetic resin strip which is held in the molding space and is fed forward on the molding rotary shaft with the spiral movement of the endless molding belt while being in contact with the molding rotary shaft. Same on both edges By sequentially welding, it is characterized in that to produce the synthetic resin pipe having a spiral reinforcement ridges.
成形回転軸上に螺旋状に巻回されて巡回運行する無端
成形ベルトの、隣接する成形ベルト部分の対向側面間で
形成される成形用空間の始端側に半溶融状態の中空合成
樹脂条材をその中空内部に空気圧をかけながら連続供給
すると、該中空合成樹脂条材の周壁は成形用空間を形成
する成形ベルトの壁面に押しつけられて整形され、且つ
形崩れが生じないように保形されつつ、管壁を構成する
上で必要な隣接する条材の内周両端部同士の融着が成形
回転軸上で行われる。A semi-molten hollow synthetic resin strip is formed on the starting end side of the molding space formed between the opposing side surfaces of the adjacent molding belt parts of the endless molding belt that is spirally wound around the molding rotation axis and runs circularly. When air is continuously supplied to the hollow interior while the air pressure is applied, the peripheral wall of the hollow synthetic resin strip is pressed against the wall surface of the molding belt forming the molding space and shaped, and the shape is maintained so that the shape is not deformed. The inner peripheral ends of the adjacent strips required for forming the pipe wall are fused together on the forming rotary shaft.
従って、製造過程において中空螺旋突条部に永久歪み
が残留するような無理な力を一切かけず、また、該中空
螺旋突条部の形崩れも発生しないので、形状面において
も、耐圧強度の面においても設計通りの合成樹脂管を連
続的に製造することができる。Therefore, in the manufacturing process, no unreasonable force is left on the hollow spiral ridges, and the hollow spiral ridges do not lose their shape. In terms of aspect, it is possible to continuously manufacture the synthetic resin pipe as designed.
又、無端成形ベルトを中空螺旋突条部から抜き取るた
めの切溝開設手段や切溝を閉止するための細幅合成樹脂
帯状材の巻きつけ工程が不要であるから、製造装置その
ものの構造を簡単にし得るばかりでなく、精度のよい合
成樹脂管を製造することができる。In addition, the structure of the manufacturing device itself is simple because there is no need for a kerf opening means for pulling out the endless molded belt from the hollow spiral ridge and a step of winding a narrow synthetic resin strip for closing the kerf. In addition to the above, it is possible to manufacture an accurate synthetic resin pipe.
以下、この発明の一実施例を図面に基づいて説明す
る。Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図乃至第３図は合成樹脂管の製造装置を示し、図
において、（１）は機枠であって、該機枠（１）の面板
（２）に、仮想円柱面に沿って数本の成形回転軸（３）
の基端部が回転自在に支持されていると共に該仮想円柱
の中心と平行にして前記機枠（１）に支軸（４）を回転
自在に突設支持し、この支軸（４）に筒状の補助軸
（５）がフリー回転可能に外嵌枢支されている。1 to 3 show an apparatus for manufacturing a synthetic resin pipe, in which (1) is a machine frame, and a face plate (2) of the machine frame (1) is provided with a number along a virtual cylinder surface. Book forming rotary shaft (3)
A base end portion of which is rotatably supported, and a spindle (4) is rotatably projectingly supported by the machine frame (1) in parallel with the center of the virtual cylinder, and the spindle (4) is supported by the spindle (4). A cylindrical auxiliary shaft (5) is externally fitted and pivotally supported so as to be freely rotatable.
上記各成形回転軸（３）は、夫々自在継手（６）を介
して互いに連結される短軸（3A）と長軸（3B）とにより
構成されるもので、前記自在継手（６）をして長軸（3
B）を短軸（3A）に対し屈曲することにより長軸（3B）
を傾斜可能に構成してあり、又、前記各短軸（3A）は機
枠（１）内において連結軸（７）、ギヤ（８）等を介
し、駆動手段であるモータ（９）に連動連結され、該モ
ータ（９）を介して各成形軸（３）を同一方向に一斉に
駆動回転自在に構成している。Each of the molding rotary shafts (3) is composed of a short shaft (3A) and a long shaft (3B) connected to each other via a universal joint (6). Long axis (3
By bending B) to the short axis (3A), the long axis (3B)
Is configured to be tiltable, and each of the short shafts (3A) is interlocked with a motor (9) as a driving means through a connecting shaft (7), a gear (8), etc. in the machine frame (1). The molding shafts (3) are connected to each other, and the molding shafts (3) can be simultaneously driven and rotated in the same direction via the motor (9).
（10）は断面が逆台形の無端成形ベルトであり、該無
端成形ベルト（10）は可撓性のベルト材から形成され、
前記仮想円柱面を形成する成形回転軸（３）上の基端部
から先端部に向かう適宜長さ部分に一定のピッチ毎に螺
旋状に巻回すると共に成形回転軸（３）から支軸（４）
上に移行させて該支軸（４）に前記と逆方向に螺旋状に
巻回し、該支軸（４）から再び成形回転軸（３）の基端
部側に巡回運行させるように構成してある。(10) is an endless forming belt having an inverted trapezoidal cross section, and the endless forming belt (10) is formed of a flexible belt material,
The molding rotary shaft (3) forming the virtual cylindrical surface is spirally wound at a fixed pitch from the base end portion to the tip end portion at a constant pitch, and the molding rotary shaft (3) is supported by the spindle (3). 4)
It is configured such that it is moved upward and is spirally wound around the support shaft (4) in the opposite direction to the above, and is made to travel again from the support shaft (4) to the base end side of the molding rotary shaft (3). There is.
（11）は螺旋状に巻回された隣接する無端成形ベルト
部の頂面間、或いは成形される中空螺旋突条間に架設状
態で被覆可能な幅を有する無端平ベルトで、成形回転軸
（３）上に巻回した無端成形ベルト（10）の外周面に密
接させて螺旋状に巻きつけられていると共に、その巻付
け終端と巻付け始端とは成形回転軸（３）の周囲に配設
されたプーリ（12）（13）とに掛け渡されて無端成形ベ
ルト（10）と同一速度で同一方向に巡回運行するように
構成されてある。(11) is an endless flat belt having a width that can be covered between the top surfaces of adjacent endless forming belt parts that are spirally wound or between the hollow spiral protrusions that are formed, and that has a forming rotation shaft ( 3) The endless forming belt (10) wound around is wound in a spiral shape so as to be in close contact with the outer peripheral surface of the endless forming belt (10), and the winding end and the winding start end are arranged around the forming rotary shaft (3). The endless forming belt (10) is looped over the installed pulleys (12) (13) so as to travel in the same direction at the same speed as the endless forming belt (10).
上記２種のベルト（10）（11）によって、前記成形回
転軸（３）上において、隣接する無端成形ベルト部分の
対向側面と該無端成形ベルト部分の頂面間に密接した平
ベルト（11）の内面間で断面が台形状の成形用空間（1
4）を螺旋方向に順送可能に形成してある。The two kinds of belts (10) and (11) closely contact the flat belt (11) between the opposing side surfaces of the adjacent endless molding belt portion and the top surface of the endless molding belt portion on the molding rotation shaft (3). A space for trapezoidal molding (1
4) is formed so that it can be sequentially fed in the spiral direction.
（15）はその先端開口部を成形用空間（14）の始端部
内に挿入している押出成形機で、断面が台形状の中空補
強部（16a）と平滑な管壁内面を形成する平坦部（16b）
とからなる合成樹脂条材（16）を半溶融状態で且つその
中空内部に圧縮空気圧の供給による内圧をかけながら押
し出すものである。(15) is an extrusion molding machine in which the tip opening is inserted into the starting end of the molding space (14), which is a flat portion forming a hollow reinforcing portion (16a) having a trapezoidal cross section and a smooth inner wall surface. (16b)
The synthetic resin strip (16) composed of and is extruded in a semi-molten state while applying an internal pressure to the hollow interior by supplying compressed air pressure.
なお、上記合成樹脂条材（16）としては、通常、全体
を硬質合成樹脂により形成するものであるが、前記台形
条の中空補強部（16a）を硬質合成樹脂とし、平坦部（1
6b）を軟質合成樹脂としてもよく、この場合は、２つの
押出成形機を使用して、先ず平坦部（16b）の合成樹脂
帯状材を無端成形ベルト（10）の内面側における成形回
転軸（３）上に供給し、この上に中空補強部（16a）の
条材を押出し供給して両者を成形回転軸（３）上で成形
保形時に融着一体化してもよい。The synthetic resin strip (16) is generally made entirely of hard synthetic resin. However, the hollow reinforcing portion (16a) of the trapezoidal strip is made of hard synthetic resin and the flat portion (1
6b) may be made of soft synthetic resin. In this case, using two extruders, first, the synthetic resin strip material of the flat portion (16b) is formed on the inner surface side of the endless molding belt (10) by the molding rotary shaft ( 3), and the strip material of the hollow reinforcing portion (16a) may be extruded and supplied thereover, and both may be fused and integrated on the molding rotary shaft (3) at the time of shape retention.
（17）は無端成形ベルト（10）の支軸（４）上からの
導出を案内するガイドローラである。Reference numeral (17) is a guide roller for guiding the endless forming belt (10) from the spindle (4).
次に、上記した構成の製造装置による合成樹脂管の製
造方法について説明する。Next, a method of manufacturing the synthetic resin pipe by the manufacturing apparatus having the above-described configuration will be described.
先ず、モータ（９）を作動させて成形回転軸（３）
（３）・・・（３）を回転させることにより、無端成形
ベルト（10）を成形回転軸（３）上並びに支軸（４）上
に亘って螺旋状に移動させる。これに伴って、平ベルト
（11）も一体に巡回移動して、両ベルト（10）（11）で
形成される断面台形状の成形用空間（14）が成形回転軸
（３）上において螺旋方向に順送される。First, the motor (9) is operated to move the molding rotary shaft (3).
(3) By rotating (3), the endless molding belt (10) is spirally moved over the molding rotation shaft (3) and the support shaft (4). Along with this, the flat belt (11) also integrally moves circularly, and the trapezoidal molding space (14) formed by both belts (10) and (11) spirals on the molding rotation shaft (3). Will be forwarded in the direction.
この状態で、押出成形機（15）から押出される半溶融
状態の合成樹脂中空条材（16）を該中空内部にブロワー
からの圧縮空気を供給しながら前記成形回転軸（３）上
における成形用空間（14）の始端部に供給する。In this state, the semi-molten synthetic resin hollow strip (16) extruded from the extruder (15) is formed on the forming rotary shaft (3) while supplying compressed air from the blower to the inside of the hollow. Supply to the beginning of the space (14).
この際、該合成樹脂中空条材（16）の中空補強部（16
a）の内面両端から突出する幅広い平坦部（16b）の両側
端部が成形回転軸（３）上に密接し、且つ該両側端部上
に無端成形ベルト（10）が載置状態で押接するように合
成樹脂中空条材（16）を供給する。At this time, the hollow reinforcing portion (16) of the synthetic resin hollow strip (16)
Both end portions of a wide flat portion (16b) projecting from both ends of the inner surface of (a) are in close contact with the forming rotary shaft (3), and the endless forming belt (10) is pressed on the both end portions in a mounted state. To supply the synthetic resin hollow strip (16).
押出成形機（15）から成形回転軸（３）上の成形用空
間（14）内にこのようにして合成樹脂中空条材（16）を
供給すると、該合成樹脂中空条材（16）の中空補強部
（16a）がベルト（10）（11）によって成形され、且つ
内圧によって緊張しようとしてベルト（10）（11）に圧
接、保形されると共に、無端成形ベルト（10）によって
押圧される平坦部（16b）の両側端面同士が順次融着一
体化されて、連続した平坦な管壁を形成する。When the synthetic resin hollow strip (16) is thus supplied from the extrusion molding machine (15) into the molding space (14) on the molding rotary shaft (3), the hollow of the synthetic resin hollow strip (16) is obtained. The reinforced portion (16a) is formed by the belts (10) and (11), and is pressed against the belts (10) and (11) to try to be tensioned by the internal pressure, and is pressed by the endless forming belt (10). Both end surfaces of the portion (16b) are sequentially fused and integrated to form a continuous flat tube wall.
こうして、第４図に示すように、中空補強部（16a）
によって螺旋中空突条（Ａ）を有し、且つ平坦部（16
b）によって内面が全長に亘って同一径となった平坦な
管壁（Ｂ）からなる合成樹脂管がベルト（10）（11）の
巻回終端側に向かって成形回転軸（３）上を連続的に移
送されながら製造されるものである。Thus, as shown in FIG. 4, the hollow reinforcing portion (16a)
Has a spiral hollow ridge (A) and has a flat portion (16
As a result of b), the synthetic resin tube consisting of a flat tube wall (B) whose inner surface has the same diameter over the entire length moves on the molding rotary shaft (3) toward the winding end side of the belt (10) (11). It is manufactured while being continuously transferred.
なお、上記実施例においては螺旋中空突条（Ａ）が断
面台形状のものについての製造を説明したが、該中空突
条（Ａ）が断面逆Ｕ字系のものであっても断面形状の異
なるベルト（10）を使用することによって製造すること
ができる。Although the spiral hollow ridge (A) is manufactured in the trapezoidal cross section in the above-mentioned embodiment, even if the hollow ridge (A) is an inverted U-shaped cross section, It can be manufactured by using different belts (10).
又、平ベルト（11）を無端成形ベルト（10）と別体に
形成して夫々別々に成形回転軸（３）上に巻付けている
が、無端成形ベルト（10）の内面側に該平ベルト部分を
一体に形成したベルトを使用してもよく、このようにす
れば、１本のベルトにより上記のようにして螺旋中空突
条を有する合成樹脂管を製造することができる。Further, the flat belt (11) is formed separately from the endless forming belt (10) and wound around the forming rotary shaft (3) separately, but the flat belt is formed on the inner surface side of the endless forming belt (10). A belt in which the belt portion is integrally formed may be used. In this way, a synthetic resin pipe having a spiral hollow ridge can be manufactured as described above by using one belt.
以上のように本発明の合成樹脂管の製造方法によれ
ば、成形回転軸の基端部側に無端成形ベルトを導入して
成形回転軸上に該無端成形ベルトを一定のピッチ毎に螺
旋状に巻回することにより隣接する成形ベルト部分の対
向側面間に適宜断面形状を有する成形用空間を形成する
と共にこの無端成形ベルトを前記成形回転軸の適所から
導出させて該成形回転軸の前記基端部側に運行させたの
ち、再び成形回転軸上に巡回させ、この無端成形ベルト
により形成される前記成形用空間の始端箇所に半溶融状
態の中空合成樹脂条材をその中空部に内圧をかけながら
押出し供給することにより、該合成樹脂条材を前記成形
用空間に保持したまゝ無端成形ベルトの螺旋移動と共に
成形回転軸上で順送すると共に成形回転軸上に接する合
成樹脂条材の内周両側端部同士を順次溶着させることに
より、螺旋状の補強突条を有する合成樹脂管を製造する
ものであるから、半溶融状態の中空合成樹脂条材を、成
形回転軸上に螺旋状に巻回して進行する無端成形ベルト
の隣接するベルト部対向側面間の成形用空間部で該空間
部と同一断面形状に成形しながら形崩れが生じないよう
に保形しつつ、外周に螺旋突条を有し且つ平坦内面を有
する合成樹脂管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 method for producing a synthetic resin pipe of the present invention, the endless forming belt is introduced on the base end side of the forming rotating shaft and the endless forming belt is spirally formed on the forming rotating shaft at a constant pitch. By forming a molding space having an appropriate cross-sectional shape between the opposing side surfaces of the adjacent molding belt portions by winding the endless molding belt, the endless molding belt is led out from the proper position of the molding rotary shaft to form the base of the molding rotary shaft. After running to the end side, it is circulated again on the molding rotary shaft, and the hollow synthetic resin strip in a semi-molten state is applied to the hollow part at the starting point of the molding space formed by this endless molding belt. The synthetic resin strip is held in the space for molding while being fed while being squeezed, and the synthetic resin strip that is in contact with the rotary shaft of the molding is fed forward along with the spiral movement of the endless molding belt. Both sides of inner circumference Since a synthetic resin pipe having a spiral reinforcing ridge is manufactured by sequentially welding the parts to each other, a semi-molten hollow synthetic resin strip is spirally wound around the molding rotary shaft. A spiral ridge is formed on the outer periphery of the advancing endless molding belt, while maintaining the shape in the molding space between adjacent side surfaces of the adjacent belt parts so as not to lose the shape while molding to the same cross-sectional shape as the space. In addition, a synthetic resin tube having a flat inner surface can be efficiently manufactured.
さらに、半溶融状態の中空合成樹脂条材には、成形空
間内でその中空内部に圧力をかけながら成形されるの
で、永久歪みの残留や形崩れ等が生じることがなく、形
状面でも耐圧強度の面においても設計通りの優れた合成
樹脂管を得ることができる。Moreover, since the semi-molten hollow synthetic resin strip is molded while applying pressure to the hollow interior in the molding space, no permanent strain remains or the shape collapses, and the pressure resistance in terms of shape Also in terms of, it is possible to obtain an excellent synthetic resin pipe as designed.
又、無端成形ベルトの隣接するベルト部対向側面間の
成形用空間部を利用して螺旋突条を有する合成樹脂管を
製造していくものであるから、成形回転軸上で合成樹脂
管が硬化したのちには、該成形回転軸上から無端成形ベ
ルトをそのまま導出させて成形回転軸上の基端側に再び
巡回させることができ、中空突条部の頂面を切除する必
要がないから、精度のよい合成樹脂管を効率良く製造で
きるものである。Moreover, since the synthetic resin pipe having the spiral ridge is manufactured by utilizing the molding space between the side surfaces of the endless molding belt which are adjacent to each other, the synthetic resin pipe is cured on the molding rotation shaft. After that, the endless molding belt can be led out from the molding rotary shaft as it is, and can be circulated again to the base end side on the molding rotary shaft, and it is not necessary to cut off the top surface of the hollow protruding portion. It is possible to efficiently manufacture an accurate synthetic resin pipe.
図面は本発明の実施例を示すもので、第１図はその製造
装置の平面図、第２図は簡略断面図、第３図は一部を省
略した側面図、第４図は製造された合成樹脂管の拡大縦
断面図、第５図は別な断面形状を有する合成樹脂管の拡
大縦断面図である。 （３）……成形回転軸、（10）……無端成形ベルト、
（11）……平ベルト、（14）……成形用空間、（15）…
…押出成形機、（16）……合成樹脂条材、（Ａ）……螺
旋中空突条、（Ｂ）……平坦内面。The drawings show an embodiment of the present invention. FIG. 1 is a plan view of the manufacturing apparatus, FIG. 2 is a simplified sectional view, FIG. 3 is a side view with a part omitted, and FIG. 4 is manufactured. FIG. 5 is an enlarged vertical sectional view of a synthetic resin pipe, and FIG. 5 is an enlarged vertical sectional view of a synthetic resin pipe having another sectional shape. (3) …… Molding shaft, (10) …… Endless molding belt,
(11) …… Flat belt, (14) …… Molding space, (15)…
… Extrusion machine, (16) …… Synthetic resin strip, (A) …… Spiral hollow ridge, (B) …… Flat inner surface.
Claims (1)
導入して成形回転軸上に該無端成形ベルトを一定のピッ
チ毎に螺旋状に巻回することにより隣接する成形ベルト
部分の対向側面間に適宜断面形状を有する成形用空間を
形成すると共にこの無端成形ベルトを前記成形回転軸の
適所から導出させて該成形回転軸の前記基端部側に運行
させたのち、再び成形回転軸上に巡回させ、この無端成
形ベルトにより形成される前記成形用空間の始端箇所に
半溶融状態の中空合成樹脂条材を該中空部に内圧をかけ
ながら供給することにより、該合成樹脂条材を前記成形
用空間に保持させて無端成形ベルトの螺旋移動と共に成
形回転軸上で順送すると共に成形回転軸上に接する合成
樹脂条材の内周両側端部同士を順次溶着させることによ
り、螺旋状の補強突条を有する合成樹脂管を製造するこ
とを特徴とする合成樹脂管の製造方法。1. An endless forming belt is introduced on the base end side of a forming rotary shaft, and the endless forming belt is spirally wound around the forming rotary shaft at a constant pitch so that adjacent forming belt parts are formed. A forming space having an appropriate cross-sectional shape is formed between the opposite side surfaces, and the endless forming belt is led out from a proper position of the forming rotating shaft to run to the base end side of the forming rotating shaft, and then the forming rotation is performed again. The synthetic resin strip is circulated on a shaft, and a semi-molten hollow synthetic resin strip is supplied to the starting end portion of the molding space formed by the endless molding belt while applying an internal pressure to the hollow portion. Is held in the molding space, and the endless forming belt is spirally moved and is sequentially fed on the forming rotary shaft, and the inner peripheral side ends of the synthetic resin strip in contact with the forming rotary shaft are sequentially welded to each other to form a spiral. Reinforcement Method for manufacturing a synthetic resin tube, characterized by producing a synthetic resin tube with a strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31248988A JP2683636B2 (en) | 1988-12-09 | 1988-12-09 | Manufacturing method of synthetic resin pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31248988A JP2683636B2 (en) | 1988-12-09 | 1988-12-09 | Manufacturing method of synthetic resin pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02155717A JPH02155717A (en) | 1990-06-14 |
| JP2683636B2 true JP2683636B2 (en) | 1997-12-03 |
Family
ID=18029827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31248988A Expired - Lifetime JP2683636B2 (en) | 1988-12-09 | 1988-12-09 | Manufacturing method of synthetic resin pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2683636B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007100837A (en) * | 2005-10-04 | 2007-04-19 | Kanaflex Corporation | Pressure-proof hose and its manufacturing method |
| CN103925428B (en) * | 2014-04-09 | 2017-08-25 | 张娟 | A kind of enhancing structure wall tube material and its manufacturing equipment, manufacture method |
| JP2017042034A (en) * | 2015-08-19 | 2017-02-23 | 矢崎総業株式会社 | Exterior member, wiring harness, and manufacturing method of exterior member |
-
1988
- 1988-12-09 JP JP31248988A patent/JP2683636B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02155717A (en) | 1990-06-14 |
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