JPH0441016A - Manufacture of perforated pipe - Google Patents
Manufacture of perforated pipeInfo
- Publication number
- JPH0441016A JPH0441016A JP15027690A JP15027690A JPH0441016A JP H0441016 A JPH0441016 A JP H0441016A JP 15027690 A JP15027690 A JP 15027690A JP 15027690 A JP15027690 A JP 15027690A JP H0441016 A JPH0441016 A JP H0441016A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- tube
- shape
- type material
- perforated
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000003466 welding Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 11
- 239000012528 membrane Substances 0.000 description 22
- 239000002184 metal Substances 0.000 description 9
- 238000005452 bending Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 5
- 239000012466 permeate Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000002759 woven fabric Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/156—Making tubes with wall irregularities
- B21C37/157—Perforations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0826—Preparing the edges of the metal sheet with the aim of having some effect on the weld
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
- B21C37/122—Making tubes or metal hoses with helically arranged seams with welded or soldered seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
- B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
- B21C37/126—Supply, or operations combined with supply, of strip material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は孔明管の製造方法に関し、例えば、内圧型管状
膜モジュールに使用する膜支持管の製造に有用なもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing a perforated tube, and is useful, for example, for manufacturing a membrane support tube used in an internal pressure type tubular membrane module.
（従来の技術）
コロイド物質、蛋白質、微生物などの比較的大きい物質
乃至は分子を溶液から分離することのできる限外濾過膜
乃至は精密濾過膜、あるいは、イオン類、低分子物等の
比較的小さい物質乃至は分子を溶液から分離することの
できる逆浸透膜（以下、逆浸透膜を含めて、単に、透過
膜という）は、工場排水の処理、下水処理、下水からの
水の回収、罐水や海水の淡水化、更には、食品、医薬、
醸造、発酵関係における精製、濃縮工程などに利用され
ている。(Prior art) Ultrafiltration membranes or microfiltration membranes that can separate relatively large substances or molecules such as colloidal substances, proteins, microorganisms, etc. from solutions, or relatively large substances such as ions, low molecular weight substances, etc. Reverse osmosis membranes (hereinafter simply referred to as permeation membranes, including reverse osmosis membranes), which can separate small substances or molecules from solutions, are used in industrial wastewater treatment, sewage treatment, water recovery from sewage, cans, etc. Desalination of water and seawater, food, medicine,
It is used in purification and concentration processes related to brewing and fermentation.
上記透過膜を用いた膜モジールには種々の型式のものが
存在し、その膜モジュールの一型式として内圧型管状膜
モジュールが知られている。There are various types of membrane modules using the above-mentioned permeable membranes, and an internal pressure type tubular membrane module is known as one type of membrane module.
この内圧型膜モジュールにおける透過機構は、外面に織
布または不織布等の補強層を設けた管状透過膜を孔明支
持管内に挿入し、この管状透過膜内に原液を加圧下で流
通させ、原液中の溶媒を透過膜に透過させて織布又は不
織布等の補強層内の間隙を縫って孔明支持管の孔に導く
ことにある。The permeation mechanism in this internal pressure type membrane module is to insert a tubular permeable membrane with a reinforcing layer of woven or non-woven fabric on its outer surface into a supporting tube, and to circulate the stock solution under pressure through this tubular permeable membrane. The purpose of this method is to allow the solvent to permeate through the permeable membrane and guide it through the gaps in the reinforcing layer such as woven or non-woven fabric to the holes of the perforated support tube.
上記において、孔明支持管の孔の大きさが大き過ぎると
、透過膜が織布等の補強層と共に孔に食い込み、透過膜
が過酷な歪を受けて破損するに至る。従って、孔を小さ
くすることが望まれるが、孔を小さくするためには、支
持管単位長さ当たりの孔の個数を多くして、透過液流通
抵抗の増大を避けなければならず、支持管の強度低下を
免れ得ない。In the above, if the size of the hole in the perforated support tube is too large, the permeable membrane will dig into the hole together with a reinforcing layer such as a woven fabric, and the permeable membrane will be subjected to severe strain and breakage. Therefore, it is desirable to make the holes smaller, but in order to make the holes smaller, it is necessary to increase the number of holes per unit length of the support tube to avoid an increase in permeate flow resistance. strength cannot be avoided.
ところで、支持管の孔を細巾のスリット孔とすれば、丸
孔に較べて、孔面積の同−下、上記透過膜の孔への食い
込みを生じに＜＜シ得、従って透過膜の破損を良く防止
でき、有利である。By the way, if the hole of the support tube is a narrow slit hole, compared to a round hole, the hole area is the same, and the permeable membrane is less likely to bite into the hole, and therefore the permeable membrane is less likely to be damaged. This is advantageous because it can effectively prevent this.
従来、孔明支持管の製造方法として、金属テープの長さ
方向に一定の間隔で丸孔を穿孔し、この穿孔金属テープ
を密接状態の螺旋状に形成して管状に成し、該テープの
螺旋合わせ目を溶接する方法が公知である。Conventionally, as a manufacturing method for perforated support tubes, round holes are perforated at regular intervals in the length direction of a metal tape, and the perforated metal tape is formed into a tightly spiral shape to form a tube. Methods of welding seams are known.
（解決しようとする課題）
しかし、この方法において、金属テープに丸孔を穿孔す
ることに代え上記の細巾スリラス孔を穿孔しても、金属
テープを真円度の良い管状に形成し難い。その理由は、
金属テープを密接状態の螺旋状に曲げ加工して管状に形
成するには、第５図及び第６図（第５図の右側面図）に
示すように、金属テープを斜めに向けた状態で、管軸の
廻りに曲げる必要があり、その時の曲げモーメントＭは
テープ長さ方向の曲げモーメント成分Ｍｃｏｓθと、テ
ープ巾方向の曲げモーメント成分ＭｓｉｎＯとのベクト
ル和であって、テープ巾方向の曲げモーメント成分Ｍｓ
ｉｎθに対し、金属テープ１′がスリット箇所２′、・
・・において、他の部分より小さな曲率半径で曲がって
しまい、金属テープ金山にわたって曲率を一様にできな
いためである（テープ長さ方向の曲げモーメント成分Ｍ
ｃｏｓθに対するテープの曲げ剛性は実質上一定であり
、このモーメント成分のために管の真円度が影響を受け
るようなことはない）。(Problem to be Solved) However, in this method, even if the above-mentioned narrow slit holes are punched instead of punching round holes in the metal tape, it is difficult to form the metal tape into a tubular shape with good roundness. The reason is,
To form a tube by bending a metal tape tightly into a spiral shape, as shown in Figures 5 and 6 (right side view of Figure 5), bend the metal tape diagonally. , it is necessary to bend around the tube axis, and the bending moment M at that time is the vector sum of the bending moment component Mcosθ in the tape length direction and the bending moment component M sinO in the tape width direction, and the bending moment M in the tape width direction is Ingredient Ms
For inθ, the metal tape 1' is at the slit location 2',
..., the metal tape bends with a smaller radius of curvature than other parts, and the curvature cannot be made uniform across the metal tape (bending moment component M in the tape length direction).
The bending stiffness of the tape with respect to cos θ is substantially constant, and the roundness of the tube is not affected by this moment component).
本発明の目的は、孔明管の孔を細巾スリットにしても、
充分に優れた真円度（内径精度）で孔明管を製造できる
方法を提供することにある。The object of the present invention is that even if the hole of the hole tube is made into a narrow slit,
It is an object of the present invention to provide a method for manufacturing a perforated tube with sufficiently excellent roundness (inner diameter accuracy).
（課題を解決するための手段）
本発明に係わる孔明管の製造方法は少なくとも一方の縁
端を凹凸状にしたテープ状材料を管状に形成し、この管
状体におけるテープ状材料の合わせ目に上記凹凸状の凹
部に基づき所定の間隔で開口を存在させ、この開口間の
テープ材料突合せ部分を溶接することを特徴とする構成
である。(Means for Solving the Problems) A method for manufacturing a perforated tube according to the present invention involves forming a tape-like material having at least one edge into an uneven shape into a tube shape, and applying the above-mentioned method to the seam of the tape-like material in this tubular body. This structure is characterized in that openings are formed at predetermined intervals based on the uneven recesses, and the abutting portions of the tape material between the openings are welded.
（作用）
テープ状材料の巾をテープ全長にわたり実質上−定にで
き（スリット巾をｄ、テープ巾をＤとすれば、テープ巾
の変化範囲は１〜（１−ｄ／Ｄ）であり、ｄ／Ｄは０．
００６以下である）、上記のテープ巾方向のモーメント
に対するテープ巾に沿っての曲率を、テープの長さ位置
に関係なく、テープの全巾にわたって一定にできる。従
って、テープを密接状態の螺旋状曲げ加工により真円度
の優れた円形管に形成できる。(Function) The width of the tape-like material can be kept substantially constant over the entire length of the tape (if the slit width is d and the tape width is D, the range of change in tape width is 1 to (1-d/D), d/D is 0.
006 or less), the curvature along the tape width with respect to the moment in the tape width direction can be made constant over the entire width of the tape, regardless of the length position of the tape. Therefore, the tape can be formed into a circular tube with excellent roundness by spiral bending in a tight state.
（実施例の説明） 以下、図面により本発明の詳細な説明する。(Explanation of Examples) Hereinafter, the present invention will be explained in detail with reference to the drawings.
第１図は本発明により製造する孔明管を示し、テープ状
材料１が密接状態の螺旋状に形成され、この螺旋状の合
わせ目に沿い、一定の間隔工、を隔てて長さＩ２、巾ｄ
のスリット孔２、・・・が設けられている。Ｒはこの管
の直径を示している。FIG. 1 shows a perforated tube manufactured according to the invention, in which a tape-like material 1 is formed into a close-fitting helix, and along the seam of this helix, separated by a certain spacing, a length I2, a width. d
slit holes 2, . . . are provided. R indicates the diameter of this tube.
本発明によって孔明管を製造するには、第２図に示すよ
うに、溶接可能なテープ状材料（金属テープ、プラスチ
ックテープ等）１の一縁端に、間隔工□を隔てて、長さ
工２、深さｄの凹部２を形成する。Ｗはテープ状材料１
の巾を示している。In order to manufacture a perforated pipe according to the present invention, as shown in FIG. 2. Form a recess 2 with a depth d. W is tape-like material 1
It shows the width.
そして、このテープ状材料１を第３図に示すように角度
θ（θ＝ｃｏｇ’ Ｗ／πＤ）で密接状態の螺旋状に曲
げ加工し、テープ縁端の合わせ目に上記凹部２により開
口部を存在させ、テープ縁端の凹部２以外の部分１０、
すなわち開口部の間の部分（長さ工、の部分）を溶接し
ていく。Then, as shown in FIG. 3, this tape-shaped material 1 is bent into a tight spiral shape at an angle θ (θ=cog'W/πD), and an opening is formed by the recess 2 at the seam of the edge of the tape. exists, and a portion 10 other than the concave portion 2 at the edge of the tape,
In other words, weld the part between the openings (the length part).
上記において、Ｉ２／（１１＋Ｉ−の比は、０．１〜０
．９とすることが適切である。０．９以上では、管製造
時での引張り強度が余りにも小さくなり過ぎ、孔明管の
製造に支障となる。他方、０．１以下では、前記した内
圧型管状膜モジュールの支持管として使用する場合に必
要とされる透過液流通に対し一〇の低抵抗値を保証し難
くなる。In the above, the ratio of I2/(11+I- is 0.1 to 0
．． It is appropriate to set it to 9. If it is 0.9 or more, the tensile strength during tube manufacturing will be too low, which will hinder the manufacture of perforated tubes. On the other hand, if it is less than 0.1, it becomes difficult to guarantee a low resistance value of 10 for permeate flow required when used as a support tube for the above-mentioned internal pressure type tubular membrane module.
上記スリットの巾ｄは１．５ｍｍ以下であり、テープ巾
Ｄ（２５〜４５画）に対する比ｄ／Ｄは０．０６以下で
ある。The width d of the slit is 1.5 mm or less, and the ratio d/D to the tape width D (25 to 45 strokes) is 0.06 or less.
テープ材料は孔明管の用途に応じて適宜に選択される。The tape material is appropriately selected depending on the use of the perforated tube.
当該孔明管を内圧型管状膜モジュールの支持管として使
用する場合は、厚み０．６〜１．０＋ｎｍの５ＵＳ３０
４，３０３テープ等を使用することが好ましい。When using the perforated tube as a support tube for an internal pressure type tubular membrane module, 5US30 with a thickness of 0.6 to 1.0+nm is used.
It is preferable to use 4,303 tape or the like.
上記テープ縁端の凹凸はテープの両縁端に形成すること
もできる。The unevenness on the edge of the tape can also be formed on both edges of the tape.
又、凹凸の形状は、第４図に示すような異形形状とする
こともできる。Moreover, the shape of the unevenness can also be made into an irregular shape as shown in FIG.
上記螺旋状の角度θはは１０〜５０°の範囲とすること
が適当であるが、０°とすること、すなわち、テープ状
材料の合わせ目を円管の中心軸に平行とすることも可能
である。The above spiral angle θ is preferably in the range of 10 to 50 degrees, but it is also possible to set it to 0 degrees, that is, to make the seam of the tape-like material parallel to the central axis of the circular tube. It is.
上記テープ状材料の合わせ目の溶接には、被覆アーク溶
接、アルゴンガス溶接、電子ビーム溶接、プラズマアー
ク溶接等を使用できる。Covered arc welding, argon gas welding, electron beam welding, plasma arc welding, etc. can be used to weld the seams of the tape-shaped materials.
なお、本発明に係わる孔明管の製造方法によれば、突き
合わせたテープ縁端の溶接に伴い管内面側にビートが発
生する。孔明管を内圧型管状膜モジュールの支持管とし
て使用する場合、このビートの高さを２００μｍ以下と
する必要がある。In addition, according to the method for manufacturing a perforated tube according to the present invention, a beat is generated on the inner surface of the tube due to welding of the butted edges of the tape. When using a perforated tube as a support tube for an internal pressure type tubular membrane module, the height of this beat must be 200 μm or less.
（発明の効果）
本発明に係わる孔明管の製造方法は、上述した通り、少
なくとも片縁端を凹凸状にしたテープ状材料を密接状態
の螺旋状、又は縦合わせて管状に形成し、そのテープ縁
端の合わせ目を間欠的に溶接しており、テープ状材料の
巾の中間にスリット孔を穿孔する必要がなく、しかも、
テープ状材料の巾を実質上テープ全長にわたって−様に
できるので、テープ状材料を管状に形成する際、テープ
巾方向に対しても−様な曲率でテープ状材料を曲げ変形
させ得、スリット孔を有する孔明管を優れた真円度、内
径精度で製造することができる。(Effects of the Invention) As described above, the method for manufacturing a perforated tube according to the present invention is to form a tape-like material having an uneven shape on at least one edge into a closely spiral shape or vertically aligning the material into a tube shape, and The edge seams are intermittently welded, eliminating the need to drill slit holes in the middle of the tape-like material's width.
Since the width of the tape-shaped material can be varied substantially over the entire length of the tape, when forming the tape-shaped material into a tube shape, the tape-shaped material can be bent and deformed with a -variable curvature in the tape width direction, and the slit holes can be It is possible to manufacture perforated tubes with excellent roundness and inner diameter accuracy.
第１図は本発明によって製造される孔明管を示す正面説
明図、第２図は本発明において使用するテープ状材料を
示す平面説明図、第３図は本発明の位置実施例を示す正
面説明図、第４図は本発明によって製造される孔明管の
孔の別個を示す説明図、第５図は従来例を示す正面説明
図、第６図は第５図の右側面図である。
１・・・テープ状材料、２・・・凹部、工 ・・・溶接
部分。FIG. 1 is an explanatory front view showing a perforated tube manufactured by the present invention, FIG. 2 is an explanatory plan view showing a tape-shaped material used in the present invention, and FIG. 3 is an explanatory front view showing a positional example of the present invention. 4 is an explanatory diagram showing separate holes of a perforated tube manufactured by the present invention, FIG. 5 is a front explanatory diagram showing a conventional example, and FIG. 6 is a right side view of FIG. 5. 1... Tape-shaped material, 2... Concavity, Machining... Welding part.
Claims (1)
状に形成し、この管状体におけるテープ状材料の合わせ
目に上記凹凸状の凹部に基づき所定の間隔で開口を存在
させ、この開口間のテープ材料突合せ部分を溶接するこ
とを特徴とする孔明管の製造方法。A tape-like material with at least one edge having an uneven shape is formed into a tubular shape, and openings are provided at predetermined intervals based on the uneven recesses at the seam of the tape-like material in this tubular body, and between the openings. A method for manufacturing a perforated tube, characterized by welding a tape material butt portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2150276A JP2791823B2 (en) | 1990-06-08 | 1990-06-08 | Internal pressure type tubular membrane member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2150276A JP2791823B2 (en) | 1990-06-08 | 1990-06-08 | Internal pressure type tubular membrane member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0441016A true JPH0441016A (en) | 1992-02-12 |
| JP2791823B2 JP2791823B2 (en) | 1998-08-27 |
Family
ID=15493427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2150276A Expired - Fee Related JP2791823B2 (en) | 1990-06-08 | 1990-06-08 | Internal pressure type tubular membrane member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2791823B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1690608A1 (en) * | 2005-02-11 | 2006-08-16 | Benteler Automobiltechnik GmbH | Method and apparatus for the manufacture of pipes |
| EP2514569A1 (en) * | 2011-04-19 | 2012-10-24 | HILTI Aktiengesellschaft | Handheld machine tool and production method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013105678B4 (en) * | 2013-06-03 | 2023-07-27 | Witzenmann Gmbh | Process for separating coiled hoses |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61289915A (en) * | 1985-06-18 | 1986-12-19 | Sumitomo Metal Ind Ltd | Manufacture of strainer pipe |
-
1990
- 1990-06-08 JP JP2150276A patent/JP2791823B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61289915A (en) * | 1985-06-18 | 1986-12-19 | Sumitomo Metal Ind Ltd | Manufacture of strainer pipe |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1690608A1 (en) * | 2005-02-11 | 2006-08-16 | Benteler Automobiltechnik GmbH | Method and apparatus for the manufacture of pipes |
| EP2514569A1 (en) * | 2011-04-19 | 2012-10-24 | HILTI Aktiengesellschaft | Handheld machine tool and production method |
| US9969072B2 (en) | 2011-04-19 | 2018-05-15 | Hilti Aktiengesellschaft | Hand-held power tool and production method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2791823B2 (en) | 1998-08-27 |
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| LAPS | Cancellation because of no payment of annual fees |