JPH0999315A - Device for manufacturing flexible tube - Google Patents
Device for manufacturing flexible tubeInfo
- Publication number
- JPH0999315A JPH0999315A JP25900495A JP25900495A JPH0999315A JP H0999315 A JPH0999315 A JP H0999315A JP 25900495 A JP25900495 A JP 25900495A JP 25900495 A JP25900495 A JP 25900495A JP H0999315 A JPH0999315 A JP H0999315A
- Authority
- JP
- Japan
- Prior art keywords
- mandrel
- fixed
- moving
- pressure
- mold
- 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.)
- Granted
Links
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、軸長方向に適宜の
ピッチ毎に波形断面を有する環状突起を備えてなるフレ
キシブルチューブを製造する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a flexible tube provided with annular projections having a corrugated cross section at an appropriate pitch in the axial direction.
【0002】[0002]
【従来の技術】各種流体の輸送用の配管系には、内部流
れの影響による振動、外部からの加振に伴う振動等、各
種の振動が発生することから、これらの振動に起因する
配管及び支持部の損傷を未然に防止するための対策が必
要であり、この種の対策の一つとして、配管系の中途に
フレキシブルチューブを介装して、前記振動に起因する
配管系の撓みを吸収する構成が広く採用されている。2. Description of the Related Art Various kinds of vibrations are generated in a piping system for transporting various fluids, such as vibrations due to an influence of an internal flow and vibrations due to external vibrations. It is necessary to take measures to prevent damage to the support part.One of the countermeasures of this kind is to install a flexible tube in the middle of the piping system to absorb the bending of the piping system caused by the vibration. The configuration to be used is widely adopted.
【0003】このような目的に使用されるフレキシブル
チューブの一つに、図4にその断面を示す如く、円管状
をなす金属チューブの周壁を屈曲させ、軸長方向に適宜
のピッチ毎に波形断面を有する複数の環状突起10,10…
を形成してなるフレキシブルチューブ1がある。このフ
レキシブルチューブ1は、環状突起10,10…の形成域の
両側に残した適長の管状部11,11の端部を、溶接、フラ
ンジ接続等の適宜の手段により他の配管に接続して配管
系の中途に介装され、軸と直交する種々の方向の力の作
用時に、各環状突起10,10…の夫々が基部の幅を増減す
るように変形して、前記各力の作用方向の撓みを吸収す
べく用いれらる。As one of the flexible tubes used for such a purpose, as shown in the cross section of FIG. 4, the circumferential wall of a circular metal tube is bent, and a corrugated cross section is formed at an appropriate pitch in the axial direction. A plurality of annular protrusions 10, 10 ...
There is a flexible tube 1 formed by forming. In this flexible tube 1, the ends of the tubular portions 11, 11 of appropriate length left on both sides of the area where the annular projections 10, 10 are formed are connected to another pipe by an appropriate means such as welding or flange connection. When a force is applied in the middle of the piping system in various directions orthogonal to the axis, each of the annular projections 10, 10 ... Deforms so as to increase or decrease the width of the base, and the direction of action of each force It is used to absorb the bending of.
【0004】以上の如きフレキシブルチューブ1は、従
来一般的には、環状突起10の夫々の形状に対応する凹所
を内面の全周に有する環状の金型を環状突起10,10…の
必要数だけ用意し、夫々の間を支持ばねにより軸長方向
への接離自在に支え、これらの金型により素材チューブ
の外周を所定の間隔毎に掴持せしめると共に、該素材チ
ューブの両端を一対のプレスヘッドにより挾持し、一方
のプレスヘッドの側から素材チューブの内側に液圧を導
入しつつ、該素材チューブに圧縮力を加える手順により
製造されている。In the conventional flexible tube 1 as described above, generally, a necessary number of annular projections 10, 10 ... Are provided with an annular mold having recesses corresponding to the respective shapes of the annular projections 10 on the entire circumference of the inner surface. Prepared, and supported between them by support springs so as to be freely contactable and separable in the axial direction, and the outer circumference of the material tube can be held at predetermined intervals by these molds, and both ends of the material tube can be paired. It is manufactured by a procedure of holding by a press head and applying a compressive force to the material tube while introducing hydraulic pressure into the material tube from one press head side.
【0005】前記素材チューブは、内側に導入される液
圧の作用により各金型の凹所の相当位置にて外側に膨ら
み、プレスヘッドによる圧縮に伴って前記凹所の内面に
押し付けられる態様にて変形する。前記金型は、プレス
ヘッドの移動に応じて夫々の間の支持ばねの付勢に抗し
て接近せしめられ、夫々の凹所内での素材チューブの変
形が周壁の厚さ変化を伴うことなく生じるようになして
ある。このようにして所望の環状突起10,10…を備える
フレキシブルチューブ1が得られる。The material tube bulges outward at a position corresponding to the recess of each mold by the action of the hydraulic pressure introduced inside, and is pressed against the inner surface of the recess as it is compressed by the press head. To transform. The molds are moved closer to each other against the bias of the support spring between them according to the movement of the press head, and the deformation of the material tube in each recess occurs without changing the thickness of the peripheral wall. It is done like this. In this way, the flexible tube 1 having the desired annular projections 10, 10 ... Is obtained.
【0006】ところが、以上の製造手順においては、前
述した如く、環状突起10,10…の必要数と同数の金型を
使用するため、これらの管理に多大の手間を要する不都
合がある上、環状突起10,10…の数が異なるフレキシブ
ルチューブ1を得ようとする場合、使用する金型の数を
変更するための段取り作業が必要であり、また、環状突
起10,10…間のピッチが異なるフレキシブルチューブ1
を得ようとする場合、金型相互間の間隔を変更するため
の段取り作業が必要があり、更には、環状突起10,10…
の両側に残す前記管状部11,11の長さに制限がある等、
種々のフレキシブルチューブ1の製造に柔軟に対応する
ことが難しいという不都合がある。However, in the above manufacturing procedure, as described above, since the same number of molds as the required number of the annular projections 10, 10 ... When trying to obtain a flexible tube 1 having different numbers of protrusions 10, 10, ..., Setup work is required to change the number of molds used, and the pitch between the annular protrusions 10, 10 ,. Flexible tube 1
In order to obtain, it is necessary to carry out setup work for changing the interval between the molds, and further, the annular projections 10, 10 ...
There is a limit to the length of the tubular parts 11, 11 left on both sides of
There is an inconvenience that it is difficult to flexibly deal with the manufacture of various flexible tubes 1.
【0007】このような不都合を解消するため、従来か
ら、図5及び図6に模式的に示す如く構成されたフレキ
シブルチューブの製造装置が用いられている。この装置
は、図示の如く、筒形をなす固定マンドレル2と、これ
の軸心部に軸長方向への摺動自在に内嵌された移動マン
ドレル3と、固定マンドレル2の先端部外側に臨ませた
固定金型4と、同側への移動マンドレル3の突出端に固
設された支持体30の外側に臨ませた移動金型5とを備え
てなる。In order to eliminate such inconvenience, conventionally, a flexible tube manufacturing apparatus configured as schematically shown in FIGS. 5 and 6 has been used. As shown in the figure, this device has a cylindrical fixed mandrel 2, a movable mandrel 3 slidably fitted in the axial center of the fixed mandrel 2, and an outer end of the fixed mandrel 2 outside. It comprises a stationary mold 4 and a movable mold 5 facing the outside of a support 30 fixed to the protruding end of the movable mandrel 3 on the same side.
【0008】固定金型4と移動金型5とは、得るべき環
状突起10の半部に相当する凹所を夫々との対向面に有
し、軸心を含む一面内にて2つ割り可能に構成されてお
り、フレーム6に固設された開閉シリンダ40,40の進退
動作により半径方向に一括して開閉させ得るようになし
てある。また移動金型5は、軸長方向への相対移動が可
能に固定金型4に組み合わせてあり、フレーム6に固設
された押し付けシリンダ50,50の進退動作により固定金
型4に接離する方向に移動させ得るようになしてある。
更に移動金型5は、固定マンドレル2の基端側への移動
マンドレル3の突出端に連結ロッド7を介して連結され
ており、該移動マンドレル3の先端に固設された支持体
30は、押し付けシリンダ50,50の動作による移動金型5
の移動に伴って、該移動金型5の内側との整合を保った
まま移動するようになしてある。The fixed mold 4 and the movable mold 5 each have a recess corresponding to a half of the annular projection 10 to be obtained on the surface facing each other, and can be divided into two within one plane including the axis. The opening / closing cylinders 40, 40 fixed to the frame 6 can be collectively opened / closed in the radial direction by the forward / backward movement. The movable die 5 is combined with the fixed die 4 so that the movable die 5 can move in the axial direction relatively, and is brought into contact with or separated from the fixed die 4 by the forward / backward movement of the pressing cylinders 50, 50 fixed to the frame 6. It can be moved in any direction.
Further, the moving die 5 is connected to the projecting end of the moving mandrel 3 to the base end side of the fixed mandrel 2 via a connecting rod 7, and a support body fixed to the tip of the moving mandrel 3.
30 is a moving mold 5 by the operation of the pressing cylinders 50, 50.
Along with the movement of, the movable die 5 is moved while maintaining its alignment with the inside of the movable die 5.
【0009】移動マンドレル3の軸心部には、固定マン
ドレル2への嵌合部の両側に開口を有して導圧路8が形
成されており、固定マンドレル2の基端側にて導圧路8
に導入される高圧の液体(一般的には高圧水)が、固定
マンドレル2の先端と支持体30との間に導かれるように
なしてある。A pressure guide passage 8 is formed at the axial center of the movable mandrel 3 with openings on both sides of the fitting portion for the fixed mandrel 2, and pressure is transmitted at the base end side of the fixed mandrel 2. Road 8
The high-pressure liquid (generally, high-pressure water) introduced in (1) is introduced between the tip of the fixed mandrel 2 and the support 30.
【0010】図中には、成型途中の素材チューブSが示
されている。該素材チューブSは、図5に示す如く、支
持体30の突出側から、該支持体30と固定マンドレル3と
に外嵌され、開閉シリンダ40,40の進出により閉じられ
た固定金型4と移動金型5とにより、夫々の該当位置を
外側から掴持せしめた態様にセットされる。このとき移
動金型5は、内側の支持体30との間に固定金型4から離
れた位置にて素材チューブSを掴持している。In the figure, a material tube S in the middle of molding is shown. As shown in FIG. 5, the material tube S is fitted onto the supporting body 30 and the fixed mandrel 3 from the protruding side of the supporting body 30, and is fixed by a fixed mold 4 which is closed by the opening and closing cylinders 40, 40. The movable die 5 sets the respective corresponding positions from the outside. At this time, the movable mold 5 holds the material tube S at a position apart from the fixed mold 4 with the inner support 30.
【0011】このようにセットされた素材チューブS
は、導圧路8を経て高圧水を導入しつつ、押し付けシリ
ンダ50,50を進出動作させて、移動金型5を固定金型4
に押し付ける手順の繰り返しにより成型される。The material tube S set in this way
Introduces high-pressure water through the pressure guiding path 8 and advances the pressing cylinders 50, 50 to move the moving mold 5 to the fixed mold 4.
Molded by repeating the procedure of pressing.
【0012】即ち、前記素材チューブSは、固定金型4
と移動金型5とによる掴持部間に作用する前記高圧水の
圧力により、図5に示す如く外側へ膨張し、この加圧状
態下での押し付けシリンダ50,50の進出により、移動金
型5が内側の支持体30との間での掴持状態を保って固定
金型4に押し付けられる結果、前記掴持部間が、図6に
示す如く、両金型4,5の合わせ部に形成された凹所の
内面に押し付けられるように変形し、該凹所に対応する
波形断面を有する環状突起10が形成されることとなり、
この形成手順を素材チューブSの軸長方向に適宜のピッ
チ毎に繰り返し実施することにより、図4に示す如きフ
レキシブルチューブ1が得られる。That is, the material tube S is a fixed mold 4
The pressure of the high-pressure water acting between the gripping portions of the moving mold and the moving mold 5 expands outward as shown in FIG. 5, and the pressing cylinders 50, 50 advance under this pressure condition to move the moving mold. As a result of 5 being pressed against the fixed mold 4 while maintaining the grip state with the inner support body 30, the space between the grip parts becomes the mating part of both molds 4 and 5 as shown in FIG. It is deformed so as to be pressed against the inner surface of the formed recess, and the annular protrusion 10 having a corrugated cross section corresponding to the recess is formed,
By repeating this forming procedure in the axial direction of the material tube S at appropriate pitches, the flexible tube 1 as shown in FIG. 4 is obtained.
【0013】このように、図5及び図6に示す装置は、
環状突起10,10…の形成が一つ毎に行われるために、製
造に要する時間が長くなる反面、環状突起10,10…の形
成数は、前述した形成手順の繰り返し回数の変更により
適宜に設定でき、また各環状突起10,10…間のピッチ
は、各手順間での素材チューブSの送り長さの変更によ
り適宜に設定できることから、環状突起10,10…の形成
数及び形成ピッチの変更に柔軟に対応し得る利点を有す
る上、両側の管状部11,11の長さにも制約を受けないこ
とから、多種少量のフレキシブルチューブ1の製造に適
した装置として用いられている。Thus, the device shown in FIGS. 5 and 6 is
Since the annular protrusions 10, 10 ... Are formed one by one, the manufacturing time is long, while the number of the annular protrusions 10, 10, ... Is appropriately changed by changing the number of repetitions of the above-described forming procedure. The pitch between the annular projections 10, 10 ... Can be set appropriately by changing the feed length of the material tube S between each procedure. Since it has the advantage of being able to flexibly respond to changes and is not restricted by the lengths of the tubular portions 11, 11 on both sides, it is used as an apparatus suitable for the production of flexible tubes 1 of various small quantities.
【0014】[0014]
【発明が解決しようとする課題】ところが、図5及び図
6に示す装置において、環状突起10の形成に際し、押し
付けシリンダ50,50の進出により移動金型5を固定金型
4に向けて移動させるとき、該移動金型5に連結ロッド
7を介して連結された移動マンドレル3の先端の支持体
30には、素材チューブSの内面に作用させるべく導入さ
れた前記高圧水の圧力Pが、図5中に矢符にて示す如く
固定マンドレル2から離れる向き、即ち、前記移動の向
きと逆向きに作用しているため、前記押し付けシリンダ
50,50の進出には、前記圧力Pに抗し得るだけの多大の
力を要し、該押し付けシリンダ50,50として大容量のシ
リンダが必要となる上、これらを支えるフレーム6、移
動金型5と移動マンドレル3とを連結する連結ロッド7
等、装置各部に十分な強度を確保する必要があり、装置
の大型化及び重量増加が避けられないという難点があっ
た。However, in the apparatus shown in FIGS. 5 and 6, when the annular projection 10 is formed, the movable dies 5 are moved toward the fixed dies 4 by advancing the pressing cylinders 50, 50. At this time, a support body at the tip of the moving mandrel 3 connected to the moving mold 5 via a connecting rod 7.
In FIG. 30, the pressure P of the high-pressure water introduced to act on the inner surface of the material tube S is away from the fixed mandrel 2 as indicated by the arrow in FIG. 5, that is, the direction opposite to the direction of the movement. Acting on the pressing cylinder
A large amount of force that can withstand the pressure P is required for the advance of the 50 and 50, and a large capacity cylinder is required as the pressing cylinders 50 and 50, and in addition, a frame 6 and a moving mold for supporting them. Connecting rod 7 for connecting the moving mandrel 3 and the moving mandrel 3
For example, it is necessary to secure sufficient strength in each part of the device, and there is a drawback that the device is inevitably increased in size and weight.
【0015】図7は、以上の難点を解消すべく構成され
たフレキシブルチューブの製造装置を模式的に示す側断
面図である。この装置は、移動金型5と移動マンドレル
3との連結ロッド7による機械的な連結を廃止し、移動
マンドレル3及びこれの先端の支持体30を前記移動金型
5と共に移動させるために、図示の如く、固定マンドレ
ル2の基端部との間に、移動マンドレル3の押圧専用の
押圧シリンダ3aを介装した構成となっている。FIG. 7 is a side sectional view schematically showing a flexible tube manufacturing apparatus configured to solve the above problems. This device eliminates the mechanical connection of the moving die 5 and the moving mandrel 3 by the connecting rod 7, and moves the moving mandrel 3 and the support 30 at the tip thereof together with the moving die 5 as shown in the drawing. As described above, a pressing cylinder 3a dedicated to pressing the moving mandrel 3 is interposed between the fixed mandrel 2 and the base end portion thereof.
【0016】この構成においては、前記押し付けシリン
ダ50,50として、素材チューブSの変形に要する力のみ
を発生し得る小容量のシリンダを使用でき、また連結ロ
ッド7が存在しないことから、装置の小型軽量化を図る
ことができるが、移動マンドレル3の押圧用に新たに設
けた押圧シリンダ3aは、前記支持体30への作用圧力Pに
抗する力を発生し得る大容量のシリンダである必要があ
り、該押圧シリンダ3aの配設位置の確保、及び支持部の
強度確保のために、十分な小型化の達成は難しいという
問題がある。In this structure, as the pressing cylinders 50, 50, a small capacity cylinder that can generate only the force required for the deformation of the material tube S can be used, and since the connecting rod 7 does not exist, the apparatus is small in size. Although it is possible to reduce the weight, the pressing cylinder 3a newly provided for pressing the moving mandrel 3 needs to be a large-capacity cylinder that can generate a force against the working pressure P on the support 30. However, there is a problem that it is difficult to achieve sufficient miniaturization in order to secure the disposition position of the pressing cylinder 3a and secure the strength of the support portion.
【0017】また、移動マンドレル3の先端に固設した
支持体30を移動させるべく行われる前記押圧シリンダ30
の進出動作は、移動金型5の移動のための前記押し付け
シリンダ50,50の進出動作と等速度にて行わせる必要が
あるが、互いに負荷条件が異なる押圧シリンダ3aと押し
付けシリンダ50,50とを等速度にて動作させ、支持体30
と移動金型5とを良好な同期状態を保って移動せしめる
ことは難しく、固定金型3と移動金型5との間にて成型
される環状突起10,10…の形状精度を良好に保つことが
難しいという新たな不都合を招来する。Further, the pressing cylinder 30 which is used to move the support 30 fixed to the tip of the moving mandrel 3.
Of the pressing cylinders 50 and 50 for moving the movable die 5 must be performed at the same speed, but the pressing cylinder 3a and the pressing cylinders 50 and 50 having different load conditions are used. Is operated at a constant speed, and the support 30
It is difficult to move the movable mold 5 and the movable mold 5 in good synchronization, and the shape accuracy of the annular projections 10, 10 formed between the fixed mold 3 and the movable mold 5 is kept good. It brings with it a new inconvenience.
【0018】本発明は斯かる事情に鑑みてなされたもの
であり、移動金型とこれの内側の支持体との機械的な連
結により両者の互いに同期した移動を実現しつつ、この
移動のために小容量のシリンダを用いることができ、小
型軽量化されたフレキシブルチューブの製造装置を提供
することを目的とする。The present invention has been made in view of the above circumstances, and realizes the movement of the movable mold and the support inside the movable mold in synchronism with each other by mechanically connecting the movable mold and the support inside thereof. It is an object of the present invention to provide a flexible tube manufacturing apparatus which can use a small-capacity cylinder and which is small and lightweight.
【0019】[0019]
【課題を解決するための手段】本発明に係るフレキシブ
ルチューブの製造装置は、筒形をなす固定マンドレル
と、これの軸心部に内嵌され軸長方向に摺動する移動マ
ンドレルとを備え、固定マンドレルの一側と、同側への
移動マンドレルの突出端に固設した支持体とに外嵌され
た素材チューブを、夫々の外側にて固定金型と移動金型
とにより掴持し、該移動金型を前記支持体と共に移動さ
せて前記固定金型に押し付け、両金型による掴持部間を
内側に導入された液圧の作用下にて変形させ、両金型の
合わせ部の形状に沿わせて加圧成型する手順を繰り返
し、波形断面を有する環状突起を軸長方向に適宜のピッ
チ毎に備えるフレキシブルチューブを製造する装置にお
いて、前記移動マンドレルと前記固定マンドレルとの嵌
合部に周設され、前記液圧が導入される圧力室と、該圧
力室の内部に配され、前記移動マンドレルの外周に固設
されたピストンとを備え、該ピストンの一側の受圧面へ
の前記液圧の作用により、前記移動マンドレルに前記移
動の向きと同向きの力を加える圧力バランス手段を具備
することを特徴とする。An apparatus for manufacturing a flexible tube according to the present invention comprises a fixed mandrel having a tubular shape and a movable mandrel which is fitted in the axial center of the fixed mandrel and slides in the axial direction. One side of the fixed mandrel and the material tube externally fitted to the support body fixed to the projecting end of the moving mandrel to the same side, grasped by the fixed mold and the moving mold on the outside of each, The movable die is moved together with the support and pressed against the fixed die, and the space between the gripping portions of both dies is deformed under the action of the hydraulic pressure introduced inside, so that In a device for manufacturing a flexible tube having cyclic protrusions having corrugated cross-sections at appropriate pitches in the axial direction, a fitting portion between the movable mandrel and the fixed mandrel is repeated according to the shape. Is installed around the A pressure chamber into which pressure is introduced, and a piston disposed inside the pressure chamber and fixed to the outer periphery of the moving mandrel, the action of the hydraulic pressure on the pressure receiving surface on one side of the piston, It is characterized by comprising pressure balance means for applying a force in the same direction as the moving direction to the moving mandrel.
【0020】本発明においては、素材チューブの内側の
加圧のために導入される液圧を、移動マンドレルと固定
マンドレルとの嵌合部に周設された圧力バランス手段の
圧力室に導入し、移動マンドレルに固設したピストンの
一面に作用させて、固定金型への押し付けのための移動
金型の移動の向きと同向きの力を生ぜしめ、前記液圧の
作用により移動マンドレル先端の支持体に加わる力を相
殺して、移動金型と共に移動マンドレルに移動力を加え
る押し付けシリンダの負荷を軽減し、小容量のシリンダ
の使用を可能とする。In the present invention, the hydraulic pressure introduced for pressurizing the inside of the material tube is introduced into the pressure chamber of the pressure balancing means provided around the fitting portion between the moving mandrel and the fixed mandrel, By acting on one surface of the piston fixed on the moving mandrel, a force in the same direction as the moving direction of the moving mold for pressing against the fixed mold is generated, and the tip of the moving mandrel is supported by the action of the hydraulic pressure. By offsetting the force applied to the body, the load of the pressing cylinder that applies the moving force to the moving mandrel together with the moving mold is reduced, and it is possible to use a small capacity cylinder.
【0021】更に加えて、前記圧力バランス手段は、前
記固定マンドレル及び前記移動マンドレルの軸長方向に
複数配してあること、また、前記ピストンの受圧面積
は、前記支持体の軸断面積に応じて設定してあることを
夫々特徴とする。In addition, a plurality of the pressure balancing means are arranged in the axial length direction of the fixed mandrel and the movable mandrel, and the pressure receiving area of the piston depends on the axial sectional area of the support. Each is characterized by being set.
【0022】即ち、固定マンドレル及び移動マンドレル
の軸長方向に圧力バランス手段を複数配し、これら夫々
が前記液圧の作用に応じて発生する力により、固定マン
ドレルと移動マンドレルとの嵌合部の外側の周方向に限
られた範囲内にて前記支持体への作用力を有効に相殺し
得るようにし、更に、一又は複数の圧力バランス手段に
おいて前記液圧の作用面となるピストンの受圧面積を、
支持体の軸断面積、即ち、該支持体への前記液圧の作用
面積に対応させて設定し、前記支持体への作用力を確実
に相殺して、押し付けシリンダの負荷を可及的に軽減す
る。That is, a plurality of pressure balancing means are arranged in the axial length direction of the fixed mandrel and the movable mandrel, and the force generated by each of these in response to the action of the hydraulic pressure causes the fixed mandrel and the movable mandrel to be fitted to each other. It is possible to effectively cancel the acting force on the support within a limited range in the outer circumferential direction, and further, the pressure receiving area of the piston which becomes the acting surface of the hydraulic pressure in one or a plurality of pressure balance means. To
The axial sectional area of the support, that is, the area corresponding to the acting area of the hydraulic pressure on the support is set to surely cancel the acting force on the support to minimize the load of the pressing cylinder. Reduce.
【0023】[0023]
【発明の実施の形態】以下本発明をその実施の形態を示
す図面に基づいて詳述する。図1及び図2は、本発明に
係るフレキシブルチューブの製造装置(以下本発明装置
という)を模式的に示す側断面図、図3は、その要部を
拡大して示す動作説明図である。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings showing the embodiments thereof. FIG. 1 and FIG. 2 are side sectional views schematically showing a flexible tube manufacturing apparatus according to the present invention (hereinafter referred to as the apparatus of the present invention), and FIG. 3 is an operation explanatory view showing an enlarged main part thereof.
【0024】本発明装置は、図5及び図6に示す装置と
同様、円管状をなす素材チューブSの周壁の屈曲成型に
より、波形断面を有する環状突起10を一つ毎に形成し
て、図4に示す如く、軸長方向に適宜のピッチ毎に適宜
数の環状突起10,10…を備えるフレキシブルチューブ1
を得るべく構成されたものであり、筒形をなす固定マン
ドレル2と、これの軸心部に軸長方向への摺動自在に内
嵌された移動マンドレル3と、固定マンドレル2の先端
部外側に臨ませた固定金型4と、同側への移動マンドレ
ル3の突出端に固設された支持体30と、該支持体30の外
側に臨ませた移動金型5とを備えてなる。Similar to the apparatus shown in FIGS. 5 and 6, the apparatus of the present invention is formed by bending the peripheral wall of the material tube S having a circular tubular shape to form the annular projections 10 each having a corrugated cross section one by one. As shown in FIG. 4, a flexible tube 1 provided with an appropriate number of annular projections 10, 10 ... At appropriate pitches in the axial direction.
A fixed mandrel 2 in the form of a cylinder, a movable mandrel 3 slidably fitted in the axial center of the fixed mandrel 2 in the axial direction, and the outer end of the fixed mandrel 2 A fixed mold 4 facing the above, a support 30 fixed to the projecting end of the moving mandrel 3 toward the same side, and a moving mold 5 facing the outside of the support 30.
【0025】固定金型4と移動金型5とは、得るべき環
状突起10の半部に相当する凹所を夫々との対向面に有
し、軸心を含む一面内にて2つ割り可能であり、矩形枠
形をなすフレーム6に固設された開閉シリンダ40,40の
進退動作により半径方向に一括して開閉させ得るように
なしてある。また移動金型5は、軸長方向への相対移動
が可能に開閉金型4に組み合わせてあり、フレーム6に
固設された押し付けシリンダ50,50の進退動作により、
夫々の出力端のラムヘッド51を介して押し引きされ、開
閉金型4に接離する方向に移動させ得るようになしてあ
る。The fixed mold 4 and the movable mold 5 each have a recess corresponding to the half of the annular projection 10 to be obtained on the surface facing each other, and can be divided into two within one plane including the axis. The opening / closing cylinders 40, 40 fixed to the frame 6 having a rectangular frame shape can be collectively opened / closed in the radial direction by the forward / backward movement. Further, the movable die 5 is combined with the opening / closing die 4 so as to be capable of relative movement in the axial direction, and by the forward / backward movements of the pressing cylinders 50, 50 fixed to the frame 6,
The ram heads 51 at the respective output ends push and pull the ram heads 51 so that they can be moved toward and away from the open / close mold 4.
【0026】固定金型4と移動金型5とは、前者の内面
に形成された案内レール4a,4aに後者の外面に形成され
た図示しない蟻溝を係合させ、軸長方向の相対移動のみ
を許容して組合わせ、前者の端面に形成された図示しな
い蟻溝をフレーム6の対応面に形成された案内レール6
a,6aに、また後者の端面に形成された図示しない蟻溝
を前記ラムヘッド51の端面に形成された案内レール5a,
5aに夫々係合させて、フレーム6とラムヘッド51との間
に架設されており、両金型4,5の開閉は、案内レール
5a,5a及び6a,6aを案内として、固定金型4への移動金
型5の接離は、案内レール4a,4aを案内として、互いに
干渉することなく行い得るようになっている。The fixed mold 4 and the movable mold 5 are moved relative to each other in the axial direction by engaging guide rails 4a, 4a formed on the inner surface of the former with dovetail grooves (not shown) formed on the outer surface of the latter. The guide rail 6 formed on the corresponding surface of the frame 6 with a dovetail groove (not shown) formed on the former end surface.
Guide rails 5a formed on the end surface of the ram head 51 have a dovetail groove (not shown) formed on the end surfaces of the a and 6a.
The molds 5 and 5 are engaged with each other and are installed between the frame 6 and the ram head 51.
The movable mold 5 can be brought into and out of contact with the fixed mold 4 by using the guide rails 4a, 4a as guides, with 5a, 5a and 6a, 6a as guides, without interfering with each other.
【0027】固定マンドレル2は、フレーム6に連設さ
れた基台60上に基部を固定され、フレーム6の一側から
前記固定金型4の内側に、その先端を同軸的に挿入せし
めた状態に支持されている。前記移動マンドレル3は、
固定マンドレル2の基端側及び先端側に適長の突出部を
有しており、先端側への突出端には、固定マンドレル2
と略等しい外径を有する円板形の支持体30が固設され、
また基端側への突出端には連結板31が固設されている。
該連結板31は、これの外側に放射状に突設された連結ブ
ラケット32と前記ラムヘッド51の外側に放射状に突設さ
れた連結ブラケット52との間に架設された連結ロッド7
により、軸長方向への同期した移動が可能に前記移動金
型5に連結されている。The fixed mandrel 2 has its base fixed on a base 60 connected to the frame 6 and has its tip coaxially inserted from one side of the frame 6 into the fixed mold 4. Supported by. The moving mandrel 3 is
The fixed mandrel 2 has protrusions of appropriate length on the base end side and the tip end side, and the fixed mandrel 2 is provided on the protrusion end toward the tip end side.
A disk-shaped support 30 having an outer diameter substantially equal to
Further, a connecting plate 31 is fixedly provided on the projecting end toward the base end side.
The connecting plate 31 is connected between a connecting bracket 32 radially protruding on the outside of the connecting plate 31 and a connecting bracket 52 radially protruding on the outside of the ram head 51.
Thus, the movable die 5 is connected to the movable die 5 in such a manner that the synchronized movement in the axial direction is possible.
【0028】なお、図1及び図2中には、一本の連結ロ
ッド7が図示されているのみであるが、連結ブラケット
32と連結ブラケット52との連結、即ち、移動マンドレル
3と移動金型5との連結は、実際には、軸断面内におい
てフレーム6が存在しない部分に架設された複数本の連
結ロッド7,7…によりなされ、この連結により移動マ
ンドレル3の先端に固設された支持体30は、押し付けシ
リンダ50,50の動作による移動金型5の移動に伴って、
該移動金型5の内側との整合を保ったまま移動するよう
になしてある。Although only one connecting rod 7 is shown in FIGS. 1 and 2, the connecting bracket is not shown.
The connection between 32 and the connection bracket 52, that is, the connection between the movable mandrel 3 and the movable die 5 is actually a plurality of connection rods 7, 7 that are erected in a portion where the frame 6 does not exist in the axial cross section. The support 30 fixed to the tip of the moving mandrel 3 by this connection is moved by the movement of the pressing cylinders 50, 50 to move the moving die 5,
The movable die 5 is designed to move while maintaining alignment with the inside of the movable die 5.
【0029】移動マンドレル3の軸心部には、固定マン
ドレル2への嵌合部の両側に開口を有して導圧路8が形
成されており、固定マンドレル2の基端側にて導圧路8
に導入される高圧の液体(一般的には高圧水)が、固定
マンドレル2の先端と支持体30との間に導かれるように
なしてある。At the axial center of the moving mandrel 3, pressure guiding paths 8 are formed with openings on both sides of the fitting portion for the fixed mandrel 2, and the pressure guiding path 8 is formed at the base end side of the fixed mandrel 2. Road 8
The high-pressure liquid (generally, high-pressure water) introduced in (1) is introduced between the tip of the fixed mandrel 2 and the support 30.
【0030】固定マンドレル2と移動マンドレル3の嵌
合部には、軸長方向の2か所にて固定マンドレル2の内
面を拡径して、移動マンドレル3の外面との間にて環状
をなす圧力室90,90が周設されており、該圧力室90,90
の内部に移動マンドレル3の該当部位に固設されたピス
トン91,91を軸長方向への摺動自在に配して、本発明の
特徴たる圧力バランス手段9,9が構成されている。At the fitting portion between the fixed mandrel 2 and the movable mandrel 3, the diameter of the inner surface of the fixed mandrel 2 is expanded at two locations in the axial direction to form an annular shape with the outer surface of the movable mandrel 3. The pressure chambers 90, 90 are provided around the pressure chambers 90, 90.
The pistons 91, 91 fixed to the corresponding portions of the movable mandrel 3 are slidably arranged in the axial direction of the movable mandrel 3 to configure the pressure balancing means 9, 9 which is a feature of the present invention.
【0031】ピストン91,91により軸長方向に分割され
た前記圧力室90,90の移動マンドレル3の先端側の半室
は、各別の分岐路80,80により前記導圧路8の中途に夫
々連通され、また、移動マンドレル3の基端側の半室
は、固定マンドレル2の周壁の該当位置を夫々貫通する
連通路81,81により外気に連通されている。The half chambers of the pressure chambers 90, 90 divided in the axial direction by the pistons 91, 91 on the tip side of the moving mandrel 3 are provided in the middle of the pressure guiding passage 8 by separate branch passages 80, 80. The semi-chambers on the base end side of the movable mandrel 3 are communicated with each other, and are communicated with the outside air by communication passages 81, 81 penetrating corresponding positions on the peripheral wall of the fixed mandrel 2.
【0032】図1及び図2には、成型途中の素材チュー
ブSが示されている。該素材チューブSは、図1に示す
如く、前記支持体30の側から前記固定マンドレル2の先
端部に適宜の嵌合長さを有して外嵌され、開閉シリンダ
40,40の進出により閉じられる固定金型4と移動金型5
とにより、夫々の該当位置を外側から掴持せしめた態様
にセットされる。このとき移動金型5は、押し付けシリ
ンダ50,50の動作により、固定金型4から離反した位置
に位置決めされており、内側の支持体30との間に固定金
型4から離れた位置にて素材チューブSを掴持してい
る。1 and 2 show a material tube S in the process of being molded. As shown in FIG. 1, the material tube S is externally fitted to the tip of the fixed mandrel 2 from the side of the support body 30 with an appropriate fitting length, and an open / close cylinder is provided.
Fixed mold 4 and movable mold 5 closed by 40,40 advance
Thus, the respective corresponding positions are set so as to be held from the outside. At this time, the movable mold 5 is positioned at a position separated from the fixed mold 4 by the operation of the pressing cylinders 50, 50, and at a position separated from the fixed mold 4 with the inner support body 30. Holds the material tube S.
【0033】このようにセットされた素材チューブS
は、従来と同様、導圧路8を経て高圧水を導入しつつ押
し付けシリンダ50,50を進出動作させて、移動金型5及
び移動マンドレル3を固定金型4に近付ける向きに移動
させ、移動金型5を固定金型4に押し付ける手順を繰り
返して成型される。The material tube S set in this way
In the same manner as in the conventional case, while pushing high-pressure water through the pressure guiding path 8, the pressing cylinders 50, 50 are advanced to move the moving mold 5 and the moving mandrel 3 in the direction of approaching the fixed mold 4, and moving. Molding is performed by repeating the procedure of pressing the mold 5 against the fixed mold 4.
【0034】このとき、素材チューブSは、固定金型4
と移動金型5とによる掴持部間に作用する前記高圧水の
圧力により、図1に示す如く外側へ膨張し、この加圧状
態下での押し付けシリンダ50,50の進出により、移動金
型5が内側の支持体30との間での掴持状態を保って固定
金型4に押し付けられる結果、前記掴持部間が、図2に
示す如く、両金型4,5の合わせ部に形成された凹所の
内面に押し付けられるように変形し、該凹所に対応する
波形断面を有する環状突起10が形成される。そして、素
材チューブSの軸長方向に適宜のピッチ毎に前記形成手
順を繰り返し実施することにより、図4に示す如きフレ
キシブルチューブ1が得られる。At this time, the material tube S is the fixed mold 4
The pressure of the high-pressure water acting between the gripping parts of the movable mold 5 and the movable mold 5 expands outward as shown in FIG. 1, and the pressing cylinders 50, 50 advance under this pressure condition to move the movable mold. As a result of 5 being pressed against the fixed mold 4 while maintaining the grip state with the inner support body 30, the space between the grip parts becomes a mating part of both molds 4 and 5 as shown in FIG. The annular protrusion 10 is deformed so as to be pressed against the inner surface of the formed recess, and the annular protrusion 10 having a corrugated cross section corresponding to the recess is formed. Then, the flexible tube 1 as shown in FIG. 4 is obtained by repeatedly performing the forming procedure at appropriate pitches in the axial direction of the material tube S.
【0035】以上の如く行われる環状突起10の形成に際
し、導圧路8を経て導入される高圧水の圧力Pは、本発
明装置においても従来と同様、図3に示す如く、移動マ
ンドレル3先端の支持体30に前記移動の向きと逆向きに
加わる一方、導圧路8の中途の分岐路80,80を経て圧力
バランス手段9,9の圧力室90,90に導入され、移動マ
ンドレル3に固設されたピストン91,91の一面に、該移
動マンドレル3の先端側から作用し、外気に連通された
他側の半室との間に生じる圧力差により、移動マンドレ
ル3には、先端側から基端側に向かう力、即ち、環状突
起10の形成のための移動の向きと同向きの力が加わり、
支持体30への作用力が相殺される。In forming the annular protrusion 10 as described above, the pressure P of the high-pressure water introduced through the pressure guiding path 8 is the same as in the conventional apparatus of the present invention, as shown in FIG. While being applied to the support body 30 in the direction opposite to the direction of the movement, it is introduced into the pressure chambers 90, 90 of the pressure balance means 9, 9 via the branch passages 80, 80 in the middle of the pressure guiding passage 8 and is transferred to the moving mandrel 3. The movable mandrel 3 has a tip end side which is applied to one surface of the fixed pistons 91, 91 from the tip side of the move mandrel 3 and is caused by a pressure difference between the piston and the half chamber on the other side communicated with the outside air. From the direction toward the proximal end, that is, the direction of movement for forming the annular projection 10 is applied,
The acting force on the support 30 is offset.
【0036】このような作用力の相殺関係は、ピストン
91,91の受圧面積を、前記支持体30の軸断面積に応じて
設定することにより効果的に達成され、望ましくは、支
持体30における受圧面積、即ち、支持体30の軸断面積か
ら移動マンドレル3の軸断面積を減じた面積に等しく設
定することにより完全に達成され、この場合、前記高圧
水の圧力Pによる移動マンドレル3への作用力は零とな
る。The offsetting relationship of such acting forces is
This is effectively achieved by setting the pressure receiving area of 91, 91 according to the axial sectional area of the support body 30, and preferably, it is moved from the pressure receiving area of the support body 30, that is, the axial sectional area of the support body 30. It is completely achieved by setting the axial cross-sectional area of the mandrel 3 equal to the area, and in this case, the acting force on the moving mandrel 3 by the pressure P of the high-pressure water becomes zero.
【0037】支持板30に作用する圧力Pは、該支持板30
の移動に伴う固定マンドレル2の先端との間の密閉容積
の減少に応じて増大するが、この増大は、圧力バランス
手段9,9の圧力室90,90への導入圧においても同様に
生じるため、前記作用力の相殺関係は、環状突起10の形
成の間、良好に維持される。The pressure P acting on the supporting plate 30 is determined by the supporting plate 30.
Increases with the decrease in the closed volume between the fixed mandrel 2 and the tip of the fixed mandrel 2, but this increase also occurs in the introduction pressure of the pressure balancing means 9, 9 into the pressure chambers 90, 90. The offsetting relationship of the acting forces is favorably maintained during the formation of the annular protrusion 10.
【0038】固定マンドレル2及び移動マンドレル3の
軸長方向の2か所に圧力バランス手段9,9を設けてあ
るのは、前述した受圧面積の設定を、固定マンドレル2
と移動マンドレル3との嵌合部の外側、即ち、移動マン
ドレル3の内,外周間の限られた範囲にて実現するため
であり、嵌合部の長さに十分な余裕がある場合には、3
か所以上に圧力バランス手段9を構成してもよく、逆
に、移動マンドレル3の内,外周間に十分な余裕が存在
する場合には、圧力バランス手段9を一か所としてもよ
い。The pressure mandrel 2 is provided at two positions in the axial direction of the fixed mandrel 2 and the movable mandrel 3 in order to set the pressure receiving area as described above.
This is because it is realized outside the fitting portion between the moving mandrel 3 and the moving mandrel 3, that is, within a limited range between the inner and outer circumferences of the moving mandrel 3, and when the fitting portion has a sufficient margin. Three
The pressure balancing means 9 may be arranged in more than one place. Conversely, if there is a sufficient margin between the inner and outer circumferences of the moving mandrel 3, the pressure balancing means 9 may be provided in one place.
【0039】従って、本発明装置においては、固定金型
4に移動金型5を押し付ける際の押し付けシリンダ50,
50の進出には、素材チューブSを膨張させるべく導入さ
れる前記高圧水の圧力Pによる支持体30への作用力に抗
し得るだけの多大の力は不要であり、特に、前述した相
殺関係が良好に達成されている場合には、固定マンドレ
ル2と移動マンドレル3との間の摺動部、固定金型4と
移動金型5との間の摺動部等、各部における機械的な摩
擦力に抗する力を要するのみであり、押し付けシリンダ
50,50を小容量化することができ、これらを支えるフレ
ーム6、移動金型5と移動マンドレル3とを連結する連
結ロッド7等、支持系の各部に高い強度を確保する必要
がなく、低強度のフレーム6の採用、並びに、連結ロッ
ド7の細径化及び必要本数の削減が可能となり、装置の
小型軽量化に寄与できる。Therefore, in the device of the present invention, the pressing cylinder 50 for pressing the movable mold 5 against the fixed mold 4,
For advancing 50, a large amount of force that can resist the acting force on the support 30 by the pressure P of the high-pressure water introduced to expand the material tube S is not necessary. Is achieved well, mechanical friction in each part such as a sliding part between the fixed mandrel 2 and the moving mandrel 3 and a sliding part between the fixed mold 4 and the moving mold 5. It only requires a force that resists the force, and the pressing cylinder
It is not necessary to secure high strength in each part of the support system, such as the frame 6 that supports these 50, 50, the frame 6 that supports them, the connecting rod 7 that connects the moving mold 5 and the moving mandrel 3, It is possible to employ the strong frame 6, and to reduce the diameter of the connecting rod 7 and reduce the required number, which contributes to the reduction in size and weight of the device.
【0040】[0040]
【発明の効果】以上詳述した如く本発明装置において
は、移動マンドレルと固定マンドレルとの嵌合部に周設
された圧力室に素材チューブの内側の加圧のために導入
される液圧を導入し、移動マンドレルに固設したピスト
ンに作用させて、固定金型への押し付けのための移動金
型の移動の向きと同向きの力を移動マンドレルに加える
構成としたから、前記液圧の作用により移動マンドレル
先端の支持体に加わる力が相殺されて、移動金型と共に
移動マンドレルに移動力を加える押し付けシリンダの負
荷を大幅に軽減することができ、小容量のシリンダの使
用が可能となる上、該押し付けシリンダの支持部の強度
確保が容易となり、装置の小型軽量化が可能となる。As described above in detail, in the device of the present invention, the hydraulic pressure introduced for pressurizing the inside of the material tube is introduced into the pressure chamber provided around the fitting portion between the movable mandrel and the fixed mandrel. Introduced, and acting on the piston fixed to the moving mandrel, since it is configured to apply a force in the same direction as the moving direction of the moving mold for pressing against the fixed mold to the moving mandrel, By the action, the force applied to the support at the tip of the moving mandrel is offset, and the load of the pressing cylinder that applies the moving force to the moving mandrel together with the moving mold can be significantly reduced, and it is possible to use a small capacity cylinder. In addition, it becomes easy to secure the strength of the supporting portion of the pressing cylinder, and the size and weight of the device can be reduced.
【0041】また、前記圧力室及び前記ピストンを備え
る圧力バランス手段を、固定マンドレル及び移動マンド
レルの軸長方向に複数配したから、両マンドレルの嵌合
部外側の周方向に限られた範囲にて前記支持体への作用
力を有効に相殺でき、更に、前記ピストンの受圧面積を
前記支持体の軸断面積に応じて設定したから、前記支持
体への作用力を確実に相殺することができ、押し付けシ
リンダの負荷を可及的に軽減することができ、更なる小
型軽量化を実現し得る等、本発明は優れた効果を奏す
る。Further, since a plurality of pressure balancing means including the pressure chamber and the piston are arranged in the axial length direction of the fixed mandrel and the movable mandrel, the pressure balancing means is limited in the circumferential direction outside the fitting parts of both mandrels. The acting force on the support can be effectively canceled, and further, since the pressure receiving area of the piston is set according to the axial sectional area of the support, the acting force on the support can be reliably canceled. The present invention has excellent effects such that the load of the pressing cylinder can be reduced as much as possible, and further reduction in size and weight can be realized.
【図面の簡単な説明】[Brief description of drawings]
【図1】本発明装置を模式的に示す側断面図である。FIG. 1 is a side sectional view schematically showing a device of the present invention.
【図2】本発明装置を模式的に示す側断面図である。FIG. 2 is a side sectional view schematically showing the device of the present invention.
【図3】本発明装置の要部を拡大して示す動作説明図で
ある。FIG. 3 is an operation explanatory view showing an enlarged main part of the device of the present invention.
【図4】本発明装置により製造されるフレキシブルチュ
ーブの断面図である。FIG. 4 is a cross-sectional view of a flexible tube manufactured by the device of the present invention.
【図5】従来のフレキシブルチューブの製造装置を模式
的に示す側断面図である。FIG. 5 is a side sectional view schematically showing a conventional flexible tube manufacturing apparatus.
【図6】従来のフレキシブルチューブの製造装置を模式
的に示す側断面図である。FIG. 6 is a side sectional view schematically showing a conventional flexible tube manufacturing apparatus.
【図7】従来のフレキシブルチューブの製造装置を模式
的に示す側断面図である。FIG. 7 is a side sectional view schematically showing a conventional flexible tube manufacturing apparatus.
1 フレキシブルチューブ 2 固定マンドレル 3 移動マンドレル 4 固定金型 5 移動金型 6 フレーム 7 連結ロッド 8 導圧路 9 圧力バランス手段 10 環状突起 40 開閉シリンダ 50 押し付けシリンダ 90 圧力室 91 ピストン S 素材チューブ 1 flexible tube 2 fixed mandrel 3 moving mandrel 4 fixed mold 5 moving mold 6 frame 7 connecting rod 8 pressure guiding path 9 pressure balancing means 10 annular projection 40 opening / closing cylinder 50 pressing cylinder 90 pressure chamber 91 piston S material tube
Claims (3)
心部に内嵌され軸長方向に摺動する移動マンドレルとを
備え、固定マンドレルの一側と、同側への移動マンドレ
ルの突出端に固設した支持体とに外嵌された素材チュー
ブを、夫々の外側にて固定金型と移動金型とにより掴持
し、該移動金型を前記支持体と共に移動させて前記固定
金型に押し付け、両金型による掴持部間を内側に導入さ
れた液圧の作用下にて変形させ、両金型の合わせ部の形
状に沿わせて加圧成型する手順を繰り返し、波形断面を
有する環状突起を軸長方向に適宜のピッチ毎に備えるフ
レキシブルチューブを製造する装置において、前記移動
マンドレルと前記固定マンドレルとの嵌合部に周設さ
れ、前記液圧が導入される圧力室と、該圧力室の内部に
配され、前記移動マンドレルの外周に固設されたピスト
ンとを備え、該ピストンの一側の受圧面への前記液圧の
作用により、前記移動マンドレルに前記移動の向きと同
向きの力を加える圧力バランス手段を具備することを特
徴とするフレキシブルチューブの製造装置。1. A fixed mandrel having a tubular shape, and a movable mandrel which is fitted in the axial center portion of the fixed mandrel and slides in the axial direction, and one side of the fixed mandrel and the protrusion of the movable mandrel to the same side. The material tubes fitted onto the support fixed to the end are held by the fixed mold and the moving mold on the outside of each, and the moving mold is moved together with the support to move the fixed metal. Pressing against the mold, deforming between the gripping parts by both molds under the action of hydraulic pressure introduced inside, repeating the procedure of press molding along the shape of the mating part of both molds, corrugated cross section In a device for manufacturing a flexible tube provided with an annular projection having an axial pitch at each appropriate pitch, the movable mandrel and the fixed mandrel are provided around a fitting portion, and a pressure chamber into which the hydraulic pressure is introduced. , The moving man disposed inside the pressure chamber, A piston fixed to the outer periphery of the drel; and a pressure balance means for applying a force in the same direction as the moving direction to the moving mandrel by the action of the hydraulic pressure on the pressure receiving surface on one side of the piston. An apparatus for manufacturing a flexible tube, which is characterized by:
ドレル及び前記移動マンドレルの軸長方向に複数配して
ある請求項1記載のフレキシブルチューブの製造装置。2. The flexible tube manufacturing apparatus according to claim 1, wherein a plurality of the pressure balancing means are arranged in the axial length direction of the fixed mandrel and the movable mandrel.
の軸断面積に応じて設定してある請求項1又は請求項2
記載のフレキシブルチューブの製造装置。3. The pressure receiving area of the piston is set according to the axial sectional area of the support.
An apparatus for manufacturing the flexible tube according to the above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25900495A JP3528112B2 (en) | 1995-10-05 | 1995-10-05 | Flexible tube manufacturing equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25900495A JP3528112B2 (en) | 1995-10-05 | 1995-10-05 | Flexible tube manufacturing equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0999315A true JPH0999315A (en) | 1997-04-15 |
JP3528112B2 JP3528112B2 (en) | 2004-05-17 |
Family
ID=17328024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP25900495A Expired - Lifetime JP3528112B2 (en) | 1995-10-05 | 1995-10-05 | Flexible tube manufacturing equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3528112B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006159206A (en) * | 2004-12-02 | 2006-06-22 | Hashimoto Kinzoku Kogyo Kk | Method and apparatus for working diametrically enlarged portion of pipe |
-
1995
- 1995-10-05 JP JP25900495A patent/JP3528112B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006159206A (en) * | 2004-12-02 | 2006-06-22 | Hashimoto Kinzoku Kogyo Kk | Method and apparatus for working diametrically enlarged portion of pipe |
Also Published As
Publication number | Publication date |
---|---|
JP3528112B2 (en) | 2004-05-17 |
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