JPH0241233A - Manufacture of composite tube - Google Patents
Manufacture of composite tubeInfo
- Publication number
- JPH0241233A JPH0241233A JP63191711A JP19171188A JPH0241233A JP H0241233 A JPH0241233 A JP H0241233A JP 63191711 A JP63191711 A JP 63191711A JP 19171188 A JP19171188 A JP 19171188A JP H0241233 A JPH0241233 A JP H0241233A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- peripheral surface
- inner peripheral
- metal
- 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.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title claims description 19
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 83
- 239000002184 metal Substances 0.000 claims abstract description 83
- 230000002093 peripheral effect Effects 0.000 claims abstract description 37
- 229920005989 resin Polymers 0.000 claims abstract description 36
- 239000011347 resin Substances 0.000 claims abstract description 36
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 17
- 239000000057 synthetic resin Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000011810 insulating material Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003779 heat-resistant material Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分￥Ｆ）
本発明は、金属管内周面を合成樹脂層で被覆された複合
管の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Utilization: ￥F) The present invention relates to a method for manufacturing a composite tube in which the inner circumferential surface of a metal tube is coated with a synthetic resin layer.
（従来の技術） 近時、給湯用、給水用、排水用、ガス配管等に。(Conventional technology) Recently, it has been used for hot water supply, water supply, drainage, gas piping, etc.
アルミニウム管等の金属管の内周面を合成樹脂層にて被
覆した複合管が使用されている。該複合管は、内周面が
合成樹脂層にて被覆されているため。A composite tube is used, which is a metal tube such as an aluminum tube whose inner peripheral surface is coated with a synthetic resin layer. This is because the inner peripheral surface of the composite pipe is coated with a synthetic resin layer.
内部を通流する水等にて腐食するおそれがなく。There is no risk of corrosion due to water flowing inside.
また機械的強度にも優れているため、配管材として好適
に用いられている。しかしながら３合成樹脂層は金属管
との接着性が悪く、該合成樹脂層内を高温水等が通流す
れば、該合成樹脂層が金属管より離脱したり、ブリスタ
ーが発生して、管内閉塞を招来するおそれがある。It also has excellent mechanical strength, so it is suitably used as a piping material. However, the third synthetic resin layer has poor adhesion to the metal pipe, and if high-temperature water or the like flows through the synthetic resin layer, the synthetic resin layer may separate from the metal pipe or cause blisters, which can cause pipe blockage. There is a risk of inviting
このため１例えば、金属管内周面に合成樹脂を押出被覆
する際には金属管とされる金属シートを。For this reason, for example, when extrusion coating a synthetic resin on the inner peripheral surface of a metal tube, a metal sheet used as a metal tube is used.
予め表面処理したり、予備加熱することにより合成樹脂
層との接着性を向上させることが特開昭６２−１９９２
２３号公報に開示されている。JP-A-62-1992 discloses that adhesion to the synthetic resin layer can be improved by surface treatment or preheating.
It is disclosed in Publication No. 23.
（発明が解決しようとする課題）
複合管を構成する合成樹脂層は、金属シートを金属管に
成形した状態で該金属管の内部から溶融樹脂を放射状に
押出して、該金属管内周面に沿わせることにより形成さ
れる。金属シートを管状に成形する際に金属シート内面
に傷がつき易く、金属管内周面に傷等があれば、その傷
内に空気が存在した状態で合成樹脂層が金属管内周面に
被覆される。このような場合には、金属管内周面と合成
樹脂層との間に空気が存在するため、所望の接着強度が
得られず、高温水の通流等により合成樹脂層が金属管内
周面より容易に離脱するおそれがある。(Problem to be Solved by the Invention) The synthetic resin layer constituting the composite pipe is formed by extruding molten resin radially from the inside of the metal tube while a metal sheet is formed into the metal tube, so as to extend the resin layer along the inner peripheral surface of the metal tube. It is formed by When forming a metal sheet into a tube shape, the inner surface of the metal sheet is easily scratched, and if there is a scratch on the inner surface of the metal tube, a synthetic resin layer is coated on the inner surface of the metal tube while air is present in the scratch. Ru. In such cases, air exists between the inner circumferential surface of the metal tube and the synthetic resin layer, so the desired adhesive strength cannot be obtained, and the synthetic resin layer may be lower than the inner circumferential surface of the metal tube due to the flow of high-temperature water, etc. There is a risk that they will easily leave.
本発明は上記従来の問題を解決するものであり。The present invention solves the above-mentioned conventional problems.
その目的は、金属管内周面と合成樹脂層との接着強度に
優れた複合管を製造し得る方法を提供することにある。The purpose is to provide a method for manufacturing a composite tube with excellent adhesive strength between the inner circumferential surface of a metal tube and a synthetic resin layer.
（課題を解決するための手段）
本発明の複合管の製造方法は、金属管内周面が合成樹脂
層にて被覆された複合管の製造方法であって、帯状の金
属シートを順次円管状に成形して金属管を製造する工程
と、製造された金属管の内部から溶融樹脂を放射状に押
出す工程と、該金属管の内周面と該金属管の内部にて放
射状に押出される溶融樹脂との間隙を減圧しつつ、該溶
融樹脂にて金属管内周面を被覆する工程と、を包含して
なり、そのことにより上記目的が達成される。(Means for Solving the Problems) The method for manufacturing a composite tube of the present invention is a method for manufacturing a composite tube in which the inner peripheral surface of the metal tube is coated with a synthetic resin layer, in which a band-shaped metal sheet is sequentially formed into a circular tube shape. A process of manufacturing a metal tube by molding, a process of extruding molten resin radially from inside the manufactured metal tube, and a process of extruding molten resin radially from the inner peripheral surface of the metal tube and inside the metal tube. The method includes the step of coating the inner circumferential surface of the metal tube with the molten resin while reducing the pressure in the gap between the resin and the resin, thereby achieving the above object.
（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.
第１図は２本発明の複合管の製造方法の実施状態を示す
縦断面図である。この製造方法は、まず。FIG. 1 is a longitudinal cross-sectional view showing the implementation state of the method for manufacturing a composite pipe according to the present invention. First of all, this manufacturing method.
帯板状の金属シートｌＯを、矢印Ａで示すその長手方向
に搬送されている間に、長手方向に延びる各側部が相対
向するように断面Ｕ字状に屈曲する。While being conveyed in the longitudinal direction indicated by arrow A, the band-shaped metal sheet IO is bent into a U-shaped cross section so that the longitudinally extending side portions face each other.
次いで、断面Ｕ字状に屈曲された金属シー）１０を。Next, a metal sheet (10) is bent into a U-shaped cross section.
その長手方向に搬送されている間に、各側縁部が重なり
合った断面真円状の円管に成形し、その重なり合った各
側縁部同士を、溶接機２０により接合して金属管１１を
製造する。そして、製造された金属管１１の内周面を、
内周面被覆金型３０を通流する溶融樹脂にて被覆して所
望の複合管１２を製造する。While being conveyed in the longitudinal direction, the metal tube 11 is formed into a circular tube with a perfect circular cross section with overlapping side edges, and the overlapping side edges are joined by a welding machine 20 to form the metal tube 11. Manufacture. Then, the inner peripheral surface of the manufactured metal tube 11 is
The desired composite pipe 12 is manufactured by coating the inner circumferential surface of the mold 30 with a flowing molten resin.
金属シート１０としては、鉄、あるいはアルミニウム、
銅、ステンレス等の非鉄金属が使用される。The metal sheet 10 is made of iron, aluminum,
Non-ferrous metals such as copper and stainless steel are used.
内周面被覆金型３０は、断面Ｕ字状に成形された金属シ
ート１０内に位置する本体部３１と、該本体部３１に基
端部が支持され、該本体部３１から金属シートＩＯの搬
送方向下流側に向けて延設された円柱状のコア部３２と
、該コア部３２に同心状に外嵌された円筒部３３とを有
する。The inner peripheral surface coating mold 30 includes a main body 31 located inside the metal sheet 10 formed into a U-shaped cross section, a base end supported by the main body 31, and a metal sheet IO from the main body 31. It has a cylindrical core part 32 extending toward the downstream side in the conveyance direction, and a cylindrical part 33 externally fitted concentrically around the core part 32.
本体部３１の配設位置よりも金属シート１０の搬送方向
下流側には、溶接機２０が配設されており１図示しない
外型により該金属シート１０は円管状に成形されて、該
溶接機２０にて各側縁部同士が溶接にて接着される。コ
ア部３２および円筒部３３の先端は。A welding machine 20 is disposed downstream of the disposed position of the main body part 31 in the conveyance direction of the metal sheet 10. The metal sheet 10 is formed into a circular tube shape by an outer mold (not shown), At 20, each side edge portion is bonded together by welding. The tips of the core portion 32 and the cylindrical portion 33 are as follows.
該溶接機２０の配設位置よりも金属管１１搬送方向の下
流側に位置している。It is located downstream of the welding machine 20 in the direction of conveyance of the metal tube 11 .
コア部３２は９本体部３１から水平状に延出した比較的
小径円柱状の支持部３２ａと、該支持部３２ａの先端部
に同心状に連設されて先端側になるに連れて徐々に拡径
された第１拡径部３２ｂと、該第１拡径部３２ｂの先端
に連設され前記支持部３２ａよりも大径の円柱状をした
連設部３２ｃと、該連設部３２ｃの先端に同心状に連設
されて先端側になるに連れて徐々に拡径された第２拡径
部３２ｄと、該第２拡径部３２ｄの先端に同心状に連設
され前記連設部３２ｃよりも大径の円柱状をした先端内
型部３２ｅと、を有する。該先端内型部３２ｅは、金属
管１１とは所定の間隙をあけて同心状に位置している。The core part 32 includes a relatively small-diameter cylindrical support part 32a extending horizontally from the main body part 31, and is concentrically connected to the tip of the support part 32a. A first enlarged diameter part 32b having an enlarged diameter, a columnar continuous part 32c connected to the tip of the first enlarged diameter part 32b and having a larger diameter than the support part 32a, and a continuous part 32c of the continuous part 32c. a second enlarged diameter part 32d concentrically connected to the tip and gradually increasing in diameter as it approaches the distal end; and a continuous part concentrically connected to the tip of the second enlarged diameter part 32d. It has a cylindrical tip inner mold part 32e with a larger diameter than 32c. The inner end portion 32e is located concentrically with the metal tube 11 with a predetermined gap therebetween.
円筒部３３は９本体部３１から一体的に連設され。The cylindrical portion 33 is integrally connected to the main body portion 31.
該コア部３２の支持部３２ａ、第１拡径部３２ｂ、およ
び連設部３２ｃのそれぞれに所定の間隙を有して同心状
に外嵌されている。そして、その先端部内周面は、コア
部３２の第２拡径部３２ｄ基端部外周面とは平行するよ
うに、先端になるに連れて徐々に拡径したテーパ面とな
っており、該テーパ面とコア部３２の第２拡径部３２ｄ
基端部外周面とによりノズル部３３ａを構成している。The support portion 32a, the first enlarged diameter portion 32b, and the continuous portion 32c of the core portion 32 are fitted concentrically with each other with a predetermined gap. The inner circumferential surface of the distal end thereof is a tapered surface whose diameter gradually increases toward the distal end so as to be parallel to the outer circumferential surface of the proximal end portion of the second enlarged diameter portion 32d of the core portion 32. Tapered surface and second enlarged diameter portion 32d of core portion 32
The outer circumferential surface of the base end portion constitutes a nozzle portion 33a.
該円筒部３３とコア部３２の間隙は２本体部３１内を挿
通ずる樹脂通路３１ａに連通しており、その間隙内には
、該樹脂通路３１ａを通って送給される溶融樹脂５０が
通流される。該溶融樹脂５０は、該円筒部３３の先端部
とコア部３２における第２拡径部３２ｄとにより形成さ
れたノズル部３３ａから放射状に押し出され、コア部３
２における先端内型部３２ｅに同心状に外嵌された金属
管１１の内周面に被覆される。The gap between the cylindrical part 33 and the core part 32 communicates with a resin passage 31a that passes through the two main body parts 31, and the molten resin 50 fed through the resin passage 31a passes through the gap. be swept away. The molten resin 50 is extruded radially from the nozzle part 33a formed by the tip of the cylindrical part 33 and the second enlarged diameter part 32d of the core part 32, and
The inner circumferential surface of the metal tube 11 that is fitted concentrically to the inner end portion 32e of the metal tube 2 is coated.
円筒部３３には、溶接機２０により製造された金属管１
１内に位置するように、連結管４１が外嵌されている。The cylindrical portion 33 has a metal tube 1 manufactured by the welding machine 20.
A connecting pipe 41 is fitted onto the outside so as to be positioned within 1.
外嵌連結管４１は１円筒部３３に内嵌されたコア部３２
における支持部３２ａの先端寄りの位置に対応して設け
られている。The external fitting connecting pipe 41 has a core part 32 fitted inside the cylindrical part 33.
The support portion 32a is provided at a position near the tip of the support portion 32a.
該連結管４１は２円筒部３３に気密に外嵌固着された管
状部４１ａと、該管状部４１ａの金属管１１！送方向下
流側端部に設けられたフランジ部４１ｂとを有する。該
フランジ部４１ｂの金属管１１搬送方向下流側端面には
、断熱材４２を介して遮蔽板４３が取付けられている。The connecting pipe 41 includes a tubular portion 41a that is airtightly fitted onto the outer surface of the two cylindrical portions 33, and a metal tube 11 of the tubular portion 41a. It has a flange portion 41b provided at the downstream end in the feeding direction. A shielding plate 43 is attached to the end face of the flange portion 41b on the downstream side in the conveying direction of the metal tube 11 via a heat insulating material 42.
該遮蔽板４３および断熱材４２は、第２図に示すように
、中央部に円筒部３３が挿通する透孔を有する円板状を
しており、遮蔽板４３の外周面は、金属管１１の内周面
に気密に接している。該遮蔽板４３は、断熱材４２と共
に、連結管４１のフランジ部４１ｈに複数のポル１−４
４．４４．・・・により取付けられている。As shown in FIG. 2, the shielding plate 43 and the heat insulating material 42 have a disc shape with a through hole in the center through which the cylindrical part 33 is inserted. is in airtight contact with the inner peripheral surface of the The shielding plate 43 includes a plurality of ports 1-4 on the flange portion 41h of the connecting pipe 41 together with the heat insulating material 42.
4.44. It is installed by...
該遮蔽板４３．断熱材４２．および連結管４１のフラン
ジ部４１ｂには吸引管４５の先端部が挿通しており。The shielding plate 43. Insulation material 42. The distal end portion of the suction tube 45 is inserted through the flange portion 41b of the connecting tube 41.
その先端面は、遮蔽板４３の端面と面一になっている。Its tip surface is flush with the end surface of the shielding plate 43.
該吸引管４５は、内周面被覆金型３０の円筒部３３と平
行に、その本体部３１側に延設されており、溶接機２０
配設位置よりも金属シート搬送方向上流側位置にて上方
に屈曲され、溶接される前のＵ字状金属シー目０の開放
された部分から外方へ延出している。該吸引管４５の基
端部は９図外の真空ポンプに連結されており、該真空ポ
ンプは、該吸引管４５を通して、遮蔽板４３にて仕切ら
れた金属管ｌｌ内を減圧する。The suction pipe 45 extends parallel to the cylindrical portion 33 of the inner peripheral surface coating mold 30 toward the main body portion 31 side, and is connected to the welding machine 20.
It is bent upward at a position upstream in the metal sheet conveyance direction from the disposed position, and extends outward from the open portion of the U-shaped metal seam 0 before welding. The base end of the suction tube 45 is connected to a vacuum pump (not shown in Figure 9), and the vacuum pump reduces the pressure in the metal tube 11 partitioned off by the shielding plate 43 through the suction tube 45.
複合管１２は次のように製造される。順次搬送される金
属シート１１は、その搬送の間に、断面Ｕ字状に成形さ
れる。そして、該金属シート１１は、内周面樹脂被覆金
型３０の配設位置を通過すると２図示しない外型により
、各側縁部同士が重ね合わされて断面真円状の円管に成
形され、その重ね合わされた部分が溶接機２０にて溶接
されて金属管１２とされる。Composite tube 12 is manufactured as follows. The metal sheets 11 that are sequentially conveyed are formed into a U-shaped cross section during the conveyance. When the metal sheet 11 passes through the position where the inner peripheral surface is resin-coated mold 30, the metal sheet 11 is formed into a circular tube with a perfect circular cross section by an outer mold (not shown) with the side edges overlapping each other. The overlapped portions are welded by a welding machine 20 to form the metal tube 12.
該金属管１１は、内周面樹脂被覆金型３０の円筒部３３
に外嵌された遮蔽板４３外周面に摺接しつつ、搬送され
る。他方２円筒部３３とコア部３２との間隙内には、溶
融樹脂５０が通流されており、該溶融樹脂５０は円筒部
３３先端のノズル部３３ａからコア部３２の第２拡径部
３２ｄに沿って放射状に押出される。該溶融樹脂５０は
、コア部３２の先端内型部３２ｅと金属管１１内周面と
の間隙内に入り込んで、該金属管１１内周面を被覆する
。このとき、金属管１１内周面と。The metal tube 11 has a cylindrical portion 33 of a mold 30 whose inner peripheral surface is coated with resin.
The shielding plate 43 is conveyed while being in sliding contact with the outer circumferential surface of the shielding plate 43 fitted on the outside. A molten resin 50 is passed through the gap between the other two cylindrical portions 33 and the core portion 32, and the molten resin 50 flows from the nozzle portion 33a at the tip of the cylindrical portion 33 to the second enlarged diameter portion 32d of the core portion 32. is extruded radially along the The molten resin 50 enters into the gap between the inner end portion 32e of the core portion 32 and the inner peripheral surface of the metal tube 11, and coats the inner peripheral surface of the metal tube 11. At this time, the inner peripheral surface of the metal tube 11.
円筒部３３外周面と、遮蔽板４３と２円筒部３３先端の
ノズル部３３ａから押出される溶融樹脂５０とにより囲
まれた空間内の空気は、真空ポンプに連結された吸引管
４５により吸引され、その空間内が減圧される。これに
より１円筒部３３先端のノズル部３３ａからコア部３２
の第２拡径部３２ｄに沿って放射状に押出された溶融樹
脂５０と金属管１１内周面との間隙が減圧状態になり、
該溶融樹脂５０は金属管１１内周面の全域にわたって密
着される。その結果、該溶融樹脂５０は、金属管１１内
周面に強固に接着される。The air in the space surrounded by the outer peripheral surface of the cylindrical part 33, the shielding plate 43, and the molten resin 50 extruded from the nozzle part 33a at the tip of the second cylindrical part 33 is sucked by a suction pipe 45 connected to a vacuum pump. , the pressure in that space is reduced. As a result, from the nozzle part 33a at the tip of the first cylindrical part 33 to the core part 32.
The gap between the molten resin 50 extruded radially along the second enlarged diameter portion 32d and the inner circumferential surface of the metal tube 11 is in a reduced pressure state,
The molten resin 50 is brought into close contact with the entire inner peripheral surface of the metal tube 11. As a result, the molten resin 50 is firmly adhered to the inner peripheral surface of the metal tube 11.
外周面が金属管１１内周面に気密に摺接する遮蔽板４３
は、シリコン樹脂、フッ素樹脂等の弾性を有する耐熱性
樹脂が使用される。該遮蔽板４３は、吸引管４５により
金属管１１内周面と溶融樹脂５０との間を減圧する際に
、金属管Ｉｎ送方向に引張られる。A shielding plate 43 whose outer peripheral surface slides in airtight contact with the inner peripheral surface of the metal tube 11
For this, a heat-resistant resin having elasticity such as silicone resin or fluororesin is used. The shielding plate 43 is pulled in the direction in which the metal tube In is fed when the suction tube 45 reduces the pressure between the inner peripheral surface of the metal tube 11 and the molten resin 50.
該遮蔽板４３と連結管４１との間に介装された断熱材４
２は、その引張力を支持する構成となっており剛性を有
するセラミックや、低熱伝導性金属であるケイ素鋼、
Ｎ１−Ｃｒａ等が使用される。A heat insulating material 4 interposed between the shielding plate 43 and the connecting pipe 41
2 is made of ceramic that has a structure that supports the tensile force and has rigidity, silicon steel that is a metal with low thermal conductivity,
N1-Cra etc. are used.
連結管４１は、金属、磁器等の耐熱性を有する材質で構
成されるが、その内周面と円筒部３３外周面との気密性
を確保するために、内周面全体が円筒部３３外周面に溶
接し得る金属が好ましい。The connecting pipe 41 is made of a heat-resistant material such as metal or porcelain, but in order to ensure airtightness between the inner circumferential surface and the outer circumferential surface of the cylindrical portion 33, the entire inner circumferential surface is made of a heat-resistant material such as metal or porcelain. Metals that can be welded to surfaces are preferred.
溶融樹脂５０としては、比較的剛性の低いものが好まし
い。The molten resin 50 is preferably one with relatively low rigidity.
本発明方法により、？Ｊ＆圧度を１００ ｍｍＨｇに保
って。By the method of the present invention? J & pressure maintained at 100 mmHg.
アルミニウム管（＋１５０５２．厚さ１．５ｍｍ）の内
周面が。The inner peripheral surface of the aluminum tube (+15052. Thickness 1.5 mm).
シラン変性低密度ポリエチレン（メルトインデックス旧
・０．６ｇ／１０ｍ１ｎ ）にて被覆された複合管を製
造したところ、アルミニウム管と樹脂のピーリング強度
は２２Ｋｇ／２ｃｌｌであり、９０°Ｃ〜７０°Ｃの熱
水を通流させてのブリスター発生時間は３００時間であ
った。減圧することなく同様の条件により複合管を製造
したところ、その複合管のピーリング強度は１８Ｋｇ／
２ｃｍ、ブリスター発生時間は２００時間であった。When a composite tube coated with silane-modified low-density polyethylene (old melt index, 0.6 g/10 m1n) was manufactured, the peeling strength between the aluminum tube and the resin was 22 kg/2 cll, and the peeling strength at 90°C to 70°C was Blister generation time when hot water was passed through the tube was 300 hours. When a composite pipe was manufactured under the same conditions without reducing the pressure, the peeling strength of the composite pipe was 18 kg/
2 cm, and the blister generation time was 200 hours.
（発明の効果）
本発明の複合管の製造方法は、このように、金属管内周
面を被覆するべく該金属管の内部から放射状に押出され
る溶融樹脂と該金属管内周面との間隙を減圧しているた
め、製造された複合管は。(Effects of the Invention) As described above, the method for manufacturing a composite pipe of the present invention reduces the gap between the molten resin extruded radially from the inside of the metal tube to cover the inner peripheral surface of the metal tube, and the inner peripheral surface of the metal tube. Because of the reduced pressure, the composite tubes produced are.
金属管とその内周面を被覆する合成樹脂層との接着強度
が著しく向上すると共に、耐ブリスター性も著しく向上
する。The adhesive strength between the metal tube and the synthetic resin layer covering its inner peripheral surface is significantly improved, and the blister resistance is also significantly improved.
↓−ゼ１１油旧Ｆ豪礼呵 第１図は本発明方法の実施状態を示す縦断面図。↓-Ze 11 Oil Old F Gorei FIG. 1 is a longitudinal sectional view showing the implementation state of the method of the present invention.
第２図は第１図の■−■線における断面図である。FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1.
１０・・・金属シート１１・・・金属管 １２・・・複
合管 ３０・・・内周面被覆金型 ３１・・・本体部
３１ａ・・・樹脂通路３２・・・コア部 ３３・・・円
筒部 ４１・・・連結管 ４２・・・断熱材 ４３・・
・遮蔽板 ４５・・・吸引管。10... Metal sheet 11... Metal tube 12... Composite tube 30... Inner peripheral surface coating mold 31... Main body part
31a...Resin passage 32...Core part 33...Cylindrical part 41...Connecting pipe 42...Insulating material 43...
- Shielding plate 45... Suction pipe.
Claims (1)
製造方法であって、 帯状の金属シートを順次円管状に成形して金属管を製造
する工程と、 製造された金属管の内部から溶融樹脂を放射状に押出す
工程と、 該金属管内周面と該金属管の内部にて放射状に押出され
る溶融樹脂との間隙を減圧しつつ、該溶融樹脂にて金属
管内周面を被覆する工程と、を包含する複合管の製造方
法。[Claims] 1. A method for manufacturing a composite tube in which the inner circumferential surface of a metal tube is coated with a synthetic resin layer, comprising the steps of manufacturing a metal tube by successively forming a band-shaped metal sheet into a circular tube shape; A step of extruding the molten resin radially from the inside of the manufactured metal tube, and a step of extruding the molten resin radially from the inside of the metal tube while reducing the pressure in the gap between the inner peripheral surface of the metal tube and the molten resin extruded radially inside the metal tube. A method for manufacturing a composite pipe, comprising: coating the inner circumferential surface of a metal pipe with a metal pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63191711A JPH0241233A (en) | 1988-07-30 | 1988-07-30 | Manufacture of composite tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63191711A JPH0241233A (en) | 1988-07-30 | 1988-07-30 | Manufacture of composite tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0241233A true JPH0241233A (en) | 1990-02-09 |
Family
ID=16279207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63191711A Pending JPH0241233A (en) | 1988-07-30 | 1988-07-30 | Manufacture of composite tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0241233A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6234335B1 (en) | 1994-12-05 | 2001-05-22 | Integrated Liner Technologies Inc. | Sealable container and open top cap with directly bonded elastomer septum |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61144321A (en) * | 1984-12-18 | 1986-07-02 | Sekisui Chem Co Ltd | Manufacturing device of composite pipe of metal and plastics |
-
1988
- 1988-07-30 JP JP63191711A patent/JPH0241233A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61144321A (en) * | 1984-12-18 | 1986-07-02 | Sekisui Chem Co Ltd | Manufacturing device of composite pipe of metal and plastics |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6234335B1 (en) | 1994-12-05 | 2001-05-22 | Integrated Liner Technologies Inc. | Sealable container and open top cap with directly bonded elastomer septum |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR930011744B1 (en) | Apparatus for forming plastics coated tube | |
| CA1323159C (en) | Apparatus for forming plastics coated tube | |
| JP6581633B2 (en) | Manufacturing method of resin-coated steel pipe | |
| EP0865352A1 (en) | Apparatus and method for making multilayer fluid conduits | |
| CN204235856U (en) | A kind of double wall heat Heat-Shrinkable Tubings inner glue layer no-mould adjusted tool | |
| JPH0241233A (en) | Manufacture of composite tube | |
| CN100450760C (en) | Production method and device for composite tube of butt welding metal tube and polymer | |
| JPH0241232A (en) | Mold for coating inner periphery of metal tube | |
| JPH0396786A (en) | Composite pipe and manufacture thereof | |
| DK2061638T3 (en) | PROCEDURE FOR MANUFACTURING A CYLINDRICAL STRING SHAPE | |
| JP2638644B2 (en) | Manufacturing method of composite pipe | |
| JPH08117841A (en) | Production of composite pipe | |
| JP2885461B2 (en) | Manufacturing method of composite pipe | |
| CN109323052B (en) | Composite pipeline and manufacturing method thereof | |
| JPH0735870B2 (en) | Manufacturing method of composite pipe | |
| JPH0462789B2 (en) | ||
| JPH0439033A (en) | Manufacture of composite pipe of metal and resin | |
| JPH04236892A (en) | Spiral composite pipe | |
| JPH07156241A (en) | Manufacture of composite tube | |
| JPH06143451A (en) | Manufacture of composite pipe | |
| CN1084246C (en) | Method and apparatus for co-extrusion of plastics on internal surface of fusion welded metal tube | |
| JPH0247029A (en) | Covering machine for inner peripheral face of metal tube | |
| JPH09133267A (en) | High-pressure resistant compound pipe and manufacture thereof | |
| JPH0247042A (en) | Manufacture of composite tube | |
| JPH0377780A (en) | Method for manufacturing laminated tube |