JPH0211233A - Manufacture of composite tube with faucet part - Google Patents
Manufacture of composite tube with faucet partInfo
- Publication number
- JPH0211233A JPH0211233A JP16186288A JP16186288A JPH0211233A JP H0211233 A JPH0211233 A JP H0211233A JP 16186288 A JP16186288 A JP 16186288A JP 16186288 A JP16186288 A JP 16186288A JP H0211233 A JPH0211233 A JP H0211233A
- Authority
- JP
- Japan
- Prior art keywords
- elastic member
- diameter
- tube
- composite
- synthetic resin
- 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
- 239000002131 composite material Substances 0.000 title claims abstract description 68
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000057 synthetic resin Substances 0.000 claims abstract description 37
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 37
- 239000000853 adhesive Substances 0.000 claims abstract description 19
- 230000001070 adhesive effect Effects 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 239000010410 layer Substances 0.000 claims description 31
- 229910052751 metal Inorganic materials 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 7
- 239000000314 lubricant Substances 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 229920006311 Urethane elastomer Polymers 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
- B29C57/02—Belling or enlarging, e.g. combined with forming a groove
- B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
- B29C57/06—Belling or enlarging, e.g. combined with forming a groove using mechanical means elastically deformable
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、金属管内周面を合成樹脂層にて被覆された複
合管の端部を拡径して受口部を有する複合管を製造する
方法に関する。Detailed Description of the Invention (Industrial Application Field) The present invention manufactures a composite pipe having a socket by expanding the diameter of the end of a composite pipe whose inner peripheral surface is coated with a synthetic resin layer. Regarding how to.
（従来の技術）
例えば、建築物内に略鉛直状に竪配管されるυト水管と
しては、金属管内周面を合成樹脂層にて被覆した複合管
が使用される。このような複合管同士の接続として実開
昭５９−５８２７９号公報に示されているように、一方
の複合管の端部が拡径されて受口部が形成され、該受口
部に、接着剤層を介して接続すべき複合管の直管状端部
の挿口部が挿入されて接着接合することが知られている
。(Prior Art) For example, a composite pipe in which the inner circumferential surface of a metal pipe is coated with a synthetic resin layer is used as a water pipe installed vertically in a building in a substantially vertical manner. As shown in Japanese Utility Model Application Publication No. 59-58279, the end of one of the composite pipes is expanded in diameter to form a socket, and the socket is connected to the socket. It is known that an insertion port of a straight end of a composite pipe to be connected is inserted through an adhesive layer and adhesively joined.
このような受口部を有する複合管を製造するには１通常
、複合管を構成する金属管の端部を、常温においてバル
ジ成形やパンチ成形により拡径加工しておき、この金属
管内に直管状の合成樹脂管を接着剤を介して嵌合させて
、金属管の拡径された端部内に嵌合された該合成樹脂管
の端部を加熱して膨張させることにより拡径し、その合
成樹脂管の拡径された端部を金属管の拡径された端部に
接着する方法により製造されている。To manufacture a composite pipe with such a socket part, 1. Normally, the end of the metal tube constituting the composite tube is expanded in diameter by bulge forming or punch forming at room temperature, and then the end is expanded directly into the metal tube. A tubular synthetic resin pipe is fitted with an adhesive, and the end of the synthetic resin pipe fitted into the enlarged end of the metal pipe is heated and expanded to expand its diameter. It is manufactured by bonding the enlarged end of a synthetic resin pipe to the enlarged end of a metal pipe.
（発明が解決しようとする課題）
しかし、このような方法では、金属管端部の拡径加工と
、直管状の合成樹脂管を金属管内に挿入して接着する加
工と５合成樹脂管の端部を加熱して拡径する加工とがそ
れぞれ必要となり２作業性が非常に悪いという欠点があ
る。(Problem to be Solved by the Invention) However, in such a method, the process of expanding the diameter of the end of the metal tube, inserting a straight synthetic resin pipe into the metal pipe and gluing it, and 5. This method requires processing to heat and expand the diameter of each part, which has the drawback of extremely poor workability.
このような加工法が採用されるのは、 ？ｊｌｆ合管の
端部を加熱してバルジ加工を行うと、ゴムが熱により損
傷するため、高価なゴム（バルジ加工ではウレタンゴム
が使用される）を頻繁に取り換える必要があるからであ
る。Why is this processing method adopted? This is because if the end of the jlf joint pipe is heated to perform bulge processing, the rubber will be damaged by the heat, so the expensive rubber (urethane rubber is used in bulge processing) must be replaced frequently.
本発明は、上記従来の問題を解決するものであり、その
目的は、生産性に優れ、しかも合成樹脂層が金属管から
容易に剥離するおそれがない、受口部を有する複合管の
製造方法を提供することにある。The present invention solves the above-mentioned conventional problems, and its purpose is to provide a method for manufacturing a composite pipe having a socket part, which has excellent productivity and does not cause the synthetic resin layer to easily peel off from the metal pipe. Our goal is to provide the following.
（課題を解決するための手段） 本発明は、複合管端部に形成される受口部では。(Means for solving problems) The present invention relates to a socket formed at the end of a composite pipe.
合成樹脂層が１０％程度伸ばされるので合成樹脂層は常
温で２０％程度の伸びを有していれば、亀裂を生じるこ
となく加工でき５また予め金属管と合成樹脂層とを強固
に接着した状態で、常温下で拡径加工しても、金属管と
合成樹脂層とが所望の接着力以上の接着力で接着されて
いれば、常温下で拡径加工しても、金属管と合成樹脂層
とが接着された状態を維持し、拡径加工された合成樹脂
層が経時的にあるいは熱によって容易に金属管から剥離
しない、との知見に基づいてなされたものである。Since the synthetic resin layer is elongated by about 10%, if the synthetic resin layer has an elongation of about 20% at room temperature, it can be processed without creating cracks. If the metal tube and the synthetic resin layer are bonded with an adhesive force higher than the desired adhesive force, even if the diameter is expanded at room temperature, the metal tube and synthetic resin layer will remain intact even if the diameter is expanded at room temperature. This was done based on the knowledge that the synthetic resin layer remains bonded to the resin layer and the diameter-expanded synthetic resin layer does not easily peel off from the metal tube over time or due to heat.
本発明の受口部を有する複合管の製造方法は金属管内周
面に合成樹脂層が所定の接着力より大となるように接着
された複合管の端部を、所定形状の内周面を有する外型
内に、その内周面とは間隙を有した状態で位置させると
共に、該端部内に弾性部材を嵌合させる工程と、該弾性
部材を常温下で軸方向に圧縮して該弾性部材を径方向へ
膨張させ、複合管端部が外型内周面に圧接するように拡
径する工程と、を包含してなり、そのことにより上記目
的が達成される。The method of manufacturing a composite pipe with a socket according to the present invention involves bonding the end of a composite pipe, in which a synthetic resin layer is bonded to the inner peripheral surface of a metal tube with an adhesive force greater than a predetermined adhesive force, to the inner peripheral surface of a predetermined shape. a step of fitting an elastic member into the end portion of the outer mold with a gap between it and the inner peripheral surface thereof, and compressing the elastic member in the axial direction at room temperature to The above object is achieved by including the step of expanding the member in the radial direction and expanding the diameter so that the end of the composite tube comes into pressure contact with the inner circumferential surface of the outer mold.
（実施例） 以下に本発明を実施例について説明する。(Example) The present invention will be described below with reference to Examples.
本発明の受口部を有する複合管の製造方法は。A method of manufacturing a composite pipe having a socket according to the present invention is as follows.
第１図に示すように１例えば鋼製の金属管１１内周面に
１例えばポリ塩化ビニル製の合成樹脂層１３が例えば発
泡ウレタンのような弾性を有する接着剤層１２にて接着
された複合管１０が使用される。該複合管ＩＯは、接着
剤層１２により、金属管内周面１１と合成樹脂層１３と
が、 ２ ｋｇ ／ ｃｎｉ以上の接着強度となるよ
うに接着されている。As shown in FIG. 1, a composite resin layer 13 made of, for example, polyvinyl chloride is bonded to the inner circumferential surface of a metal pipe 11 made of, for example, steel with an adhesive layer 12 having elasticity such as urethane foam. A tube 10 is used. In the composite pipe IO, the metal pipe inner circumferential surface 11 and the synthetic resin layer 13 are bonded to each other by an adhesive layer 12 so as to have an adhesive strength of 2 kg/cni or more.
該複合管１０の端部は、バルジ加工機２０により拡バル
ジ加工により拡径加工するバルジ加工機２０は複合管１
０端部がその内部に位置される２つ割り可能な外型２１
を有する。核外型２１は、一端面に、複合管１０の外径
に略等しい透孔２１ａを有し、該透孔２１ａから複合管
１０の端部が外型２０内へ挿入される。The end of the composite pipe 10 is expanded in diameter by bulge processing by a bulge processing machine 20.
An outer mold 21 that can be divided into two, with the zero end located inside the mold
has. The outer core mold 21 has a through hole 21a approximately equal to the outer diameter of the composite tube 10 on one end surface, and the end of the composite tube 10 is inserted into the outer mold 20 through the through hole 21a.
核外型２１の内周面は、形成すべき受口部構造の外周面
に対応した形状になっている。The inner peripheral surface of the nuclear outer mold 21 has a shape corresponding to the outer peripheral surface of the socket structure to be formed.
該外型２１内には、透孔２１ａから核外型２１内に挿入
される複合管１０の軸心に沿って、ロッド２２がその軸
方向への移動可能に配設されている。該ロッド２２の一
端部は、外型２１の透孔２１ａが形成された端面に対向
する端面から外型２１の外部に延出しており、その端部
は、油圧シリンダ２３内のピストン２３ａに連結されて
いる。そして、ピストン２３ａが油圧シリンダ２３の軸
方向へ移動することにより。Inside the outer mold 21, a rod 22 is disposed so as to be movable in the axial direction along the axis of the composite tube 10 which is inserted into the outer mold 21 through the through hole 21a. One end of the rod 22 extends to the outside of the outer mold 21 from an end surface opposite to the end surface in which the through hole 21a of the outer mold 21 is formed, and the end is connected to a piston 23a in the hydraulic cylinder 23. has been done. Then, the piston 23a moves in the axial direction of the hydraulic cylinder 23.
該ロッド２２が軸方向に移動する。該ロッド２２の他方
の端部には、複合管１０における合成樹脂層１３の内径
に略等しい外径を有する円板状の押圧部材２４が取付け
られている。The rod 22 moves in the axial direction. A disk-shaped pressing member 24 having an outer diameter approximately equal to the inner diameter of the synthetic resin layer 13 in the composite tube 10 is attached to the other end of the rod 22 .
ロッド２２には、押圧部材２４と該押圧部材２４に対向
する外型２１の内面との間にわたって２弾性部材２５が
、摺動可能に嵌合されている。該弾性部材２５はウレタ
ンゴム等の弾性体で構成され、ロッド２２が油圧シリン
ダ２３から最も進出した状態では、押圧部材２４は、該
弾性部材２５を押圧することがなく。Two elastic members 25 are slidably fitted into the rod 22 between the pressing member 24 and the inner surface of the outer mold 21 facing the pressing member 24 . The elastic member 25 is made of an elastic body such as urethane rubber, and when the rod 22 is fully advanced from the hydraulic cylinder 23, the pressing member 24 does not press the elastic member 25.
該弾性部材２５は自身の弾性力にて伸張状態となってい
る。このような状態では、該弾性部材２５は複台管１０
の内径より若干小さい外径の円筒状となっている。そし
て、ロッド２２が油圧シリンダ２３内へ退入する方向へ
移動すると、該弾性部材２５は、押圧部材２４と複合管
１０の内面とにより圧縮されて径方向へ膨張する。The elastic member 25 is stretched by its own elastic force. In such a state, the elastic member 25
It has a cylindrical shape with an outer diameter slightly smaller than the inner diameter. When the rod 22 moves in the direction of retraction into the hydraulic cylinder 23, the elastic member 25 is compressed by the pressing member 24 and the inner surface of the composite pipe 10 and expands in the radial direction.
このような構成のバルジ加工機２０により、複合管１０
の端部に受口部を形成する場合は、まず、油圧シリンダ
２３を駆動して、ロッド２２を該油圧シリンダ２３より
進出した状態にしておく。そして１弾性部材２５の周面
に弾性部材２５と合成樹脂層１３との接着剤等が用いら
れる。このような状態で、外型２１を２つ割りに分割し
た状態にしておき、複合管１０の端部を弾性部材２５に
外嵌する。このとき１弾性部材２５と複合管１０とは２
ｍｍ程度の間隙を有している。With the bulge processing machine 20 having such a configuration, the composite pipe 10
When forming a socket at the end of the rod 22, the hydraulic cylinder 23 is first driven so that the rod 22 is advanced from the hydraulic cylinder 23. Then, an adhesive or the like between the elastic member 25 and the synthetic resin layer 13 is used on the circumferential surface of the first elastic member 25. In this state, the outer mold 21 is divided into two parts, and the end of the composite tube 10 is fitted onto the elastic member 25. At this time, 1 elastic member 25 and composite pipe 10 are 2
It has a gap of about mm.
その後１分割された外型２１を一体化して、固定する。Thereafter, the divided outer mold 21 is integrated and fixed.
外型２１の固定は２機械的ロック、あるいは油圧シリン
ダによる押付けにより実現される。複合管１０は、一体
化された外型２１内に端部のみが位置され、他の部分は
外型２１の透孔２１ａから外部へ延出している。透孔２
１ａの内径は、複合管１０の外径より若干大きく、複合
管１０は透孔２１ａに対して遊嵌状態となっている。Fixing of the outer mold 21 is achieved by two mechanical locks or by pressing with a hydraulic cylinder. Only the end portion of the composite tube 10 is located within the integrated outer mold 21, and the other portion extends to the outside from the through hole 21a of the outer mold 21. Through hole 2
The inner diameter of 1a is slightly larger than the outer diameter of the composite tube 10, and the composite tube 10 is loosely fitted into the through hole 21a.
このような状態で油圧シリンダ２３を駆動し、ロッド２
２を該油圧シリンダ２３に対して退入する方向へ移動さ
せる。同時に複合管ｌＯが外型２１内へ挿入されるよう
に、該複合管１０に圧力を加える。これにより、ロッド
２２先端に取付けられた押圧部材２４が外型２１内の複
合管１０端面側へ移動し５弾性部材２５は、該押圧部材
２４により圧縮され、複合管１０の端部を径方向に膨張
させて複合管１０の外面を外型２１の内面へと押圧する
。弾性部材２５外周面と複合管１０における合成樹脂層
１３内周面との間には滑剤が介装されていると、該弾性
部材２５は円滑に圧縮され、金属管１１と合成樹脂層１
３とが一体となって拡径する。In this state, the hydraulic cylinder 23 is driven and the rod 2
2 in the direction of retraction with respect to the hydraulic cylinder 23. At the same time, pressure is applied to the composite tube 10 so that the composite tube IO is inserted into the outer mold 21. As a result, the pressing member 24 attached to the tip of the rod 22 moves toward the end surface of the composite tube 10 in the outer mold 21, and the elastic member 25 is compressed by the pressing member 24, and the end of the composite tube 10 is moved in the radial direction. to press the outer surface of the composite tube 10 against the inner surface of the outer mold 21. When a lubricant is interposed between the outer circumferential surface of the elastic member 25 and the inner circumferential surface of the synthetic resin layer 13 of the composite pipe 10, the elastic member 25 is smoothly compressed, and the metal tube 11 and the synthetic resin layer 1
3 expands in diameter.
このとき、複合管１０は外型２１内に位置する端面が核
外型２１内面に圧接されるように圧力が加えられている
と、複合管１０の端部が拡径される際に。At this time, if pressure is applied to the composite tube 10 so that the end surface located inside the outer mold 21 is pressed against the inner surface of the core outer mold 21, when the diameter of the end of the composite tube 10 is expanded.
金属管１０が外型２１内に移動するようにして拡径され
るため、その拡径部が薄肉になるおそれがな（。Since the diameter of the metal tube 10 is expanded as it moves into the outer mold 21, there is no risk that the expanded diameter portion will become thin.
また、その端面が外型２１内面から離れる方向へ引っ張
られて受口部の長さが短くなるおそれもない。Further, there is no possibility that the end face will be pulled away from the inner surface of the outer mold 21 and the length of the socket will be shortened.
その後、さらに、ロッド２２を油圧シリンダ２３内に退
入するように移動させて弾性部材２５をさらに圧縮する
と、複合管１０の端部はさらに拡径され、第２図に示す
ように、該複合管ＩＯ端部外周面が、外型２１内周面に
圧接される。これにより、複合管１０の端部は所定形状
に拡径されて所定構造の受口部が形成される。Thereafter, when the rod 22 is further moved into and out of the hydraulic cylinder 23 to further compress the elastic member 25, the end of the composite pipe 10 is further expanded in diameter, and as shown in FIG. The outer peripheral surface of the end of the pipe IO is pressed against the inner peripheral surface of the outer mold 21. As a result, the end portion of the composite pipe 10 is expanded in diameter into a predetermined shape, and a socket portion having a predetermined structure is formed.
複合管１０の端部に所定形状の受口部が形成されると、
ロッド２２は油圧シリンダ２３から進出する方向へ移動
され、押圧部材２４による弾性部材２５の圧縮を解除す
る。次いで、外型２１の固定を解除して分割状態とし、
複合管１０を軸方向へ移動させて弾性部材２５から該複
合管１０を取りはずす。このとき、油圧シリンダ２３を
移動させて２弾性部材２５を複合管１０の端部内から取
りはずすようにしてもよい。When a socket portion of a predetermined shape is formed at the end of the composite pipe 10,
The rod 22 is moved in the direction of advancing from the hydraulic cylinder 23, and the compression of the elastic member 25 by the pressing member 24 is released. Next, the fixation of the outer mold 21 is released to make it into a divided state,
The composite tube 10 is removed from the elastic member 25 by moving it in the axial direction. At this time, the two elastic members 25 may be removed from the end of the composite pipe 10 by moving the hydraulic cylinder 23.
これにより、所定形状の受口部を有する複合管１０が得
られる。As a result, a composite pipe 10 having a socket portion having a predetermined shape is obtained.
金属管１１としては、鋼製に限らず、軟鉄、銅。The metal tube 11 is not limited to steel, but may also be made of soft iron or copper.
アルミニウム、鉛等からなる管が用いられる。Pipes made of aluminum, lead, etc. are used.
該金属管１１内周面を被覆する合成樹脂層１３としては
、受口部を形成するのに１０％程度伸ばされることから
、拡径時に亀裂を生じることのないように、常温下で２
０％以上の伸びを有するものが好適に用いられる。具体
的には、ポリ塩化ビニル（ＰＶＣ）に限らず、ポリエチ
レン（ＰＥ）、架橋ポリエチレン。Since the synthetic resin layer 13 covering the inner circumferential surface of the metal tube 11 is stretched by about 10% to form the socket, the synthetic resin layer 13 should be stretched at room temperature for 20 minutes to prevent cracking during diameter expansion.
Those having an elongation of 0% or more are preferably used. Specifically, it is not limited to polyvinyl chloride (PVC), but also polyethylene (PE) and crosslinked polyethylene.
ポリブテン、ポリプロピレン、フッ素樹脂等である。These include polybutene, polypropylene, fluororesin, etc.
金属管１１と合成樹脂層１３とは常温下で拡径加工した
際に合成樹脂層１３が金属管１１内周面から剥離しない
ように接着されている。接着強度としては。The metal tube 11 and the synthetic resin layer 13 are bonded together so that the synthetic resin layer 13 will not peel off from the inner peripheral surface of the metal tube 11 when the diameter is expanded at room temperature. As for adhesive strength.
ゴム系、エポキシ系、ホットメルト系等の接着剤で接着
される場合には、２ｋｇ／ｃ４以上の接着力を有してい
るのが好ましい。When bonding with a rubber-based, epoxy-based, or hot-melt adhesive, it is preferable that the adhesive has an adhesive strength of 2 kg/c4 or more.
また、該接着剤層１２として１弾性を有するウレタン発
泡体、スチレン発泡体、ゴム系発泡体、接着剤が含浸さ
れたスポンジ等を用いれば、複合管１０の端部がバルジ
加工機２０により拡径された際には圧縮状態となるため
、該バルジ加工機２０から複合管１０を取りはずした後
に１合成樹脂層１３が収縮して金属管１１内周面から剥
離しようとする力を緩和させることができ、さらに収縮
しても弾性的に伸長して合成樹脂管に追随し剥離するこ
とがない。Furthermore, if a urethane foam, styrene foam, rubber foam, sponge impregnated with an adhesive, etc. having an elasticity of 1 is used as the adhesive layer 12, the end of the composite pipe 10 can be expanded by the bulge processing machine 20. When the composite pipe 10 is removed from the bulge processing machine 20, it will be in a compressed state, so the first synthetic resin layer 13 contracts and reduces the force of peeling from the inner circumferential surface of the metal pipe 11. Even if it contracts, it will elastically expand and follow the synthetic resin pipe, and will not peel off.
従って１合成樹脂層１３が収縮した状態で所定の内径と
なるように外型の内径寸法を決めて受口部を形成するの
が好ましい。Therefore, it is preferable to form the socket by determining the inner diameter of the outer mold so that the first synthetic resin layer 13 has a predetermined inner diameter in a contracted state.
バルジ加工機２０による拡径加工に際して、ロッド２２
の移動方向に向けて複合管１０に加えられる圧力は１例
えば、内径１００ｍｍ、厚さ３ ｍｍの鋼管内周面に、
厚さ２値の塩化ビニルが被覆された複合管では、５〜１
５トンを要する。この場合、複合管１０の端部の拡径加
工に要する総荷重は４０〜５０トンである。During diameter expansion processing by the bulge processing machine 20, the rod 22
The pressure applied to the composite pipe 10 in the direction of movement is 1. For example, on the inner peripheral surface of a steel pipe with an inner diameter of 100 mm and a thickness of 3 mm,
For composite pipes coated with binary-thickness vinyl chloride, 5 to 1
It requires 5 tons. In this case, the total load required to expand the diameter of the end of the composite pipe 10 is 40 to 50 tons.
このような圧力を加えない場合には１弾性部材２５の圧
縮による拡径時に、複合管１０を外型２１に対して固定
しておき、外型２１内の複合管端面が、ロッド２２の移
動方向とは反対方向へ移動し得る状態とすれば、複合管
１０の端部が拡径された場合に。If such pressure is not applied, the composite tube 10 is fixed to the outer mold 21 when the diameter is expanded by compression of the first elastic member 25, and the end surface of the composite tube inside the outer mold 21 is prevented from moving the rod 22. If the end portion of the composite pipe 10 is expanded in diameter, it can move in the opposite direction.
複合管１０の外型２１内に位置する端面がロッド２２移
動方向とは反対方向へ移動し、拡径部は薄肉になるおそ
れがない。このときの複合管１０と外型２１との固定に
は、外型２１に設けられた透孔２１ａを複合管１０外周
面へ強く密着させる構成、あるいは、複合管ＩＯの受口
部形成側とは反対側の端部を金属板等の支持体にて支持
する構成等が採用される。The end face of the composite tube 10 located inside the outer mold 21 moves in the opposite direction to the moving direction of the rod 22, and there is no risk that the enlarged diameter portion will become thin. In order to fix the composite pipe 10 and the outer mold 21 at this time, the through hole 21a provided in the outer mold 21 can be tightly attached to the outer peripheral surface of the composite pipe 10, or For example, a configuration is adopted in which the opposite end is supported by a support such as a metal plate.
（発明の効果）
本発明の受口部を有する複合管の製造方法はこのように
、金属管内周面と合成樹脂層とが所定の接着力より大と
なるように予め接着された複合管の端部を、常温下で弾
性部材により拡径する構成であるため１作業性は著しく
向上し、従って。(Effects of the Invention) The method for manufacturing a composite pipe having a socket according to the present invention is as described above, in which the inner peripheral surface of the metal pipe and the synthetic resin layer are bonded in advance so that the adhesive strength is greater than a predetermined adhesive force. Since the diameter of the end portion is expanded by an elastic member at room temperature, the workability is significantly improved.
生産効率が著しく向上する。しかも、得られる複合管の
受口部構造は２合成樹脂層に亀裂が生じるおそれがなく
、また該合成樹脂層が金属管内周面から剥離するおそれ
もない。Production efficiency is significantly improved. Moreover, in the socket structure of the resulting composite pipe, there is no risk of cracks occurring in the two synthetic resin layers, and there is no risk of the synthetic resin layer peeling off from the inner circumferential surface of the metal pipe.
金属管と合成樹脂とを接着する接着剤層が弾性を有して
いれば、複合管端部を拡径した後に合成樹脂層が縮径し
ても弾性的に追随して、該合成樹脂層の金属管内周面か
らの剥離を確実に防止し得る。If the adhesive layer that bonds the metal pipe and the synthetic resin has elasticity, even if the synthetic resin layer shrinks in diameter after expanding the end of the composite pipe, it will elastically follow the synthetic resin layer. Peeling from the inner peripheral surface of the metal tube can be reliably prevented.
４、 ゛の なＬ
第１図は本発明の受口部を有する複合管の製造方法の実
施状態を示す断面図、第２図はその動作説明図である。4. Figure 1 is a sectional view showing the implementation state of the method for manufacturing a composite pipe having a socket portion according to the present invention, and Figure 2 is an explanatory diagram of its operation.
１０・・・複合管、１１・・・金属管、１２・・・接着
剤層、１３・・・合成樹脂層、２０・・・バルジ成形機
、２１・・・外型、２２・・・ロッド、２３・・・油圧
シリンダ、２４・・・押圧部材、２５・・・弾性部材。DESCRIPTION OF SYMBOLS 10... Composite pipe, 11... Metal tube, 12... Adhesive layer, 13... Synthetic resin layer, 20... Bulge forming machine, 21... Outer mold, 22... Rod , 23... Hydraulic cylinder, 24... Pressing member, 25... Elastic member.
第１図 Ｚ） 第２図 ？ｎ 以上Figure 1 Z) Figure 2 ? n that's all
Claims (1)
なるように接着された複合管の端部を、所定形状の内周
面を有する外型内に、その内周面とは間隙を有した状態
で位置させると共に、該端部内に弾性部材を嵌合させる
工程と、 該弾性部材を常温下で軸方向に圧縮して該弾性部材を径
方向へ膨張させ、複合管端部が外型内周面に圧接するよ
うに拡径する工程と、 を包含する受口部を有する複合管の製造方法。 ２、前記金属管内周面と合成樹脂層との接着力が２ｋｇ
／ｃｍ＾２以上である請求項１に記載の受口部を有する
複合管の製造方法。 ３、前記接着には接着剤が使用され、この接着剤層が弾
性を有する請求項１に記載の受口部を有する複合管の製
造方法。[Claims] 1. The end of a composite pipe, in which a synthetic resin layer is bonded to the inner circumferential surface of the metal tube so that the adhesive force is greater than a predetermined adhesive force, is placed in an outer mold having an inner circumferential surface of a predetermined shape, a step of positioning the elastic member with a gap from the inner circumferential surface thereof and fitting an elastic member into the end portion; and compressing the elastic member in the axial direction at room temperature and expanding the elastic member in the radial direction. and expanding the diameter of the composite tube so that the end of the composite tube comes into pressure contact with the inner circumferential surface of the outer mold. 2. The adhesive force between the inner peripheral surface of the metal tube and the synthetic resin layer is 2 kg.
2. The method for manufacturing a composite pipe having a socket portion according to claim 1, wherein the diameter is at least /cm^2. 3. The method for manufacturing a composite pipe having a socket portion according to claim 1, wherein an adhesive is used for the bonding, and the adhesive layer has elasticity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63161862A JP2566622B2 (en) | 1988-06-29 | 1988-06-29 | Manufacturing method of composite pipe having receiving part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63161862A JP2566622B2 (en) | 1988-06-29 | 1988-06-29 | Manufacturing method of composite pipe having receiving part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0211233A true JPH0211233A (en) | 1990-01-16 |
| JP2566622B2 JP2566622B2 (en) | 1996-12-25 |
Family
ID=15743375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63161862A Expired - Lifetime JP2566622B2 (en) | 1988-06-29 | 1988-06-29 | Manufacturing method of composite pipe having receiving part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2566622B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH041024A (en) * | 1990-04-19 | 1992-01-06 | Sekisui Chem Co Ltd | Method for molding receiving port of composite pipe |
| WO2002062504A1 (en) * | 2001-02-08 | 2002-08-15 | Gustav Klauke Gmbh | Expansion tool for expanding tube ends and pressing device comprising such an expansion tool |
| WO2006060118A1 (en) * | 2004-11-30 | 2006-06-08 | The Boeing Company | Transition forming machine |
| US7128558B2 (en) * | 2002-08-09 | 2006-10-31 | The Boeing Company | Post-forming of thermoplastic ducts |
| JP2008254037A (en) * | 2007-04-06 | 2008-10-23 | Higashio Mech Co Ltd | Pipe end expanding tool |
| JP2011080252A (en) * | 2009-10-07 | 2011-04-21 | Kanematsu Nnk Corp | Knot forming device |
| WO2019021554A1 (en) * | 2017-07-28 | 2019-01-31 | 三桜工業株式会社 | Pipe end part processing device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2450879C1 (en) * | 2011-03-29 | 2012-05-20 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Уральский университет имени первого Президента России Б.Н. Ельцина" | Tube dispensing device |
| KR101473746B1 (en) | 2014-09-03 | 2014-12-19 | (주)금양이앤씨 | Wear resistant tube, and a manufacturing method that can detect the liquid outlet |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5545043U (en) * | 1978-09-18 | 1980-03-24 | ||
| JPS58173035A (en) * | 1982-04-02 | 1983-10-11 | Hitachi Ltd | Flaring method of tube end |
| JPS5958279U (en) * | 1982-10-12 | 1984-04-16 | 株式会社クボタ | composite pipe |
| JPS61157889A (en) * | 1984-12-28 | 1986-07-17 | 三菱樹脂株式会社 | Composite pipe and manufacture thereof |
-
1988
- 1988-06-29 JP JP63161862A patent/JP2566622B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5545043U (en) * | 1978-09-18 | 1980-03-24 | ||
| JPS58173035A (en) * | 1982-04-02 | 1983-10-11 | Hitachi Ltd | Flaring method of tube end |
| JPS5958279U (en) * | 1982-10-12 | 1984-04-16 | 株式会社クボタ | composite pipe |
| JPS61157889A (en) * | 1984-12-28 | 1986-07-17 | 三菱樹脂株式会社 | Composite pipe and manufacture thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH041024A (en) * | 1990-04-19 | 1992-01-06 | Sekisui Chem Co Ltd | Method for molding receiving port of composite pipe |
| WO2002062504A1 (en) * | 2001-02-08 | 2002-08-15 | Gustav Klauke Gmbh | Expansion tool for expanding tube ends and pressing device comprising such an expansion tool |
| US7065995B2 (en) | 2001-02-08 | 2006-06-27 | Gustav Klauke Gmbh | Expansion tool for expanding tube ends and pressing device comprising such an expansion tool |
| US7128558B2 (en) * | 2002-08-09 | 2006-10-31 | The Boeing Company | Post-forming of thermoplastic ducts |
| WO2006060118A1 (en) * | 2004-11-30 | 2006-06-08 | The Boeing Company | Transition forming machine |
| US7287406B2 (en) | 2004-11-30 | 2007-10-30 | The Boeing Company | Transition forming machine |
| JP2008254037A (en) * | 2007-04-06 | 2008-10-23 | Higashio Mech Co Ltd | Pipe end expanding tool |
| JP2011080252A (en) * | 2009-10-07 | 2011-04-21 | Kanematsu Nnk Corp | Knot forming device |
| WO2019021554A1 (en) * | 2017-07-28 | 2019-01-31 | 三桜工業株式会社 | Pipe end part processing device |
| JP2019025510A (en) * | 2017-07-28 | 2019-02-21 | 三桜工業株式会社 | Pipe end processing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2566622B2 (en) | 1996-12-25 |
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