JPH0790263B2 - Manufacturing method of composite pipe - Google Patents
Manufacturing method of composite pipeInfo
- Publication number
- JPH0790263B2 JPH0790263B2 JP2033442A JP3344290A JPH0790263B2 JP H0790263 B2 JPH0790263 B2 JP H0790263B2 JP 2033442 A JP2033442 A JP 2033442A JP 3344290 A JP3344290 A JP 3344290A JP H0790263 B2 JPH0790263 B2 JP H0790263B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- lead
- aluminum
- tube
- manufacturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Extrusion Of Metal (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、アルミニウム管と鉛管との組合せから成る
複合パイプの製造方法に関するものである。TECHNICAL FIELD The present invention relates to a method for manufacturing a composite pipe made of a combination of an aluminum pipe and a lead pipe.
アルミニウムは、高導電性、非磁性、高熱伝導性、軽量
であると共に、延性、展性に富み、連続押出し加工が容
易であるという優れた特性を有するので、近年、例え
ば、長尺電力ケーブルの金属シースとして利用されてき
た。Aluminum has excellent characteristics that it is highly conductive, non-magnetic, highly heat conductive, lightweight, and has excellent ductility and malleability and easy continuous extrusion processing. It has been used as a metal sheath.
この場合、アルミニウム管は、内部に長尺物体を包み込
むことが可能な連続押出し機、例えば、電力ケーブルの
金属押出し用に使用されている独国ヒドロリーク社製の
ヒドロリークアルミプレス又は独国シュレーマン社製の
シュレーマンアルミプレスによって連続押出し加工さ
れ、シームレスの長尺のものが製造できると共に、素材
が軟らかいので、小径のものでは、特別の波付け加工を
施さなくても、可撓性を有し、ドラムに巻き付けて運搬
することも可能である。また、大径のものの場合におい
ても、波付け加工が容易であるから、ドラムへの巻付
け、あるいは曲りの多い場所への布設がきわめて容易で
あるといった利点がある。さらに、アルミニウムの最大
引張応力は、鉄ほどではないにしてもかなりのものが期
待できるので、相当高い内圧に耐えるパイプを得ること
が可能である。In this case, the aluminum tube is a continuous extruder capable of wrapping a long object inside, for example, a Hydroleak aluminum press or a German Schlehmann manufactured by Hydroleak GmbH used for metal extrusion of power cables. It can be continuously extruded with a Schlemann aluminum press manufactured by the company to produce a seamless long product, and because the material is soft, small diameters have flexibility without special corrugation processing. However, it is also possible to wind it around a drum and carry it. Further, even in the case of a large diameter one, there is an advantage that the corrugating process is easy, so that it is extremely easy to wind it around a drum or to lay it in a place with many bends. Furthermore, since the maximum tensile stress of aluminum can be expected to be not so high as that of iron, it is possible to obtain a pipe capable of withstanding a considerably high internal pressure.
しかしながら、その反面、アルミニウム管は、特別の防
食加工を施さないと耐食性が悪いので、、水、水蒸気あ
るいはメタノール等によって腐食されやすく、前記の特
色が生かされないきらいがあった。例えば、アルミニウ
ム管は、水、水蒸気、メタノール等の薬品の輸送用には
一般的には使用されておらず、また、アルミニウム管を
ヒートパイプのコンテナ用パイプに使用して、作動液を
熱伝達能力が高く、安価で安全な水やメタノールとした
場合、長時間経過後にこの作動液とアルミニウムが反応
して水素ガスが発生することがあって不適合であるた
め、作動液がフロン等に限定されるという問題があっ
た。On the other hand, however, the aluminum pipe has poor corrosion resistance unless special anticorrosion treatment is applied, and therefore, the aluminum pipe is easily corroded by water, water vapor, methanol or the like, and there is a tendency that the above-mentioned characteristic cannot be utilized. For example, aluminum pipes are not commonly used for transporting chemicals such as water, water vapor, methanol, etc.Also, aluminum pipes are used for heat pipe container pipes to transfer hydraulic fluid to heat transfer. If water or methanol, which has a high capacity, is inexpensive and safe, is not suitable because hydrogen gas may be generated due to the reaction of this hydraulic fluid with aluminum after a long time, the hydraulic fluid is limited to CFCs etc. There was a problem that
一方、鉛は腐食に対して非常に安定した金属であり、
水、水蒸気はもちろんのこと、多くの薬品類に対しても
耐食性を示し、高導電性、非磁性、高熱伝導性であると
共に、延性、展性、可撓性にも富み、長尺押出し加工が
可能であるという優れた特性をもっているが、その反
面、軟かすぎて最大引張り応力が小さいこと、すなわ
ち、パイプにすると高い圧力で使えないこと、および非
常に重いという欠点があり、これがために単独のパイプ
としてはきわめて限られた用途にしか使用されていなか
った。On the other hand, lead is a very stable metal against corrosion,
Not only water and water vapor but also corrosion resistance against many chemicals, it is highly conductive, non-magnetic and highly heat conductive, and also has excellent ductility, malleability and flexibility, and long extrusion process. However, it has the disadvantage that it is too soft and the maximum tensile stress is small, that is, it cannot be used under high pressure when it is made into a pipe, and it is very heavy. As a single pipe, it was used for very limited purposes.
そこで、この発明は、これら鉛とアルミニウムの優れた
面を生かした耐食性の良好な長尺の複合パイプを得るこ
とをその技術的課題とするものである。Then, this invention makes it a technical subject to obtain the long composite pipe excellent in corrosion resistance which made good use of the outstanding surface of these lead and aluminum.
上記の課題を解決するために講じた手段は次のとおりで
ある。The measures taken to solve the above problems are as follows.
すなわち、鉛管を製造した後、この鉛管を、長尺物体を
包み込むことができるアルミニウム連続押出し機に供給
し、上記鉛管を芯にしてこの鉛管の外周を真空に保った
状態で、この鉛管の外周面にアルミニウム管を被せ、こ
の後鉛管内に圧力媒体を封入して鉛管を拡げ、鉛管をア
ルミニウム管の内周面に密着被覆せしめるものである。That is, after the lead pipe is manufactured, the lead pipe is supplied to an aluminum continuous extruder capable of wrapping a long object, and the lead pipe outer periphery is kept in a vacuum with the lead pipe being the core. The surface is covered with an aluminum tube, and thereafter, the pressure medium is enclosed in the lead tube to expand the lead tube, and the lead tube is closely adhered to the inner peripheral surface of the aluminum tube.
この場合、鉛管は、直接アルミニウム管内面に密着せし
めてもよいが、鉛管の上に塗料、接着布テープ、あるい
は熱融着プラスチックテープ、押出しプラスチック層等
の保護層を介して密着させてもよい。In this case, the lead pipe may be directly adhered to the inner surface of the aluminum pipe, but may be adhered to the lead pipe through a protective layer such as paint, adhesive cloth tape, heat-sealing plastic tape, or extruded plastic layer. .
このような方法によって、アルミニウム管の内周面に鉛
管を密着させた複合パイプが得られる。By such a method, a composite pipe in which a lead pipe is closely attached to the inner peripheral surface of an aluminum pipe can be obtained.
次に、この発明に係る複合パイプの製造方法の一実施例
について説明する。Next, an embodiment of the method for manufacturing the composite pipe according to the present invention will be described.
第１図に示すように、OF電力ケーブル製造で公知の真空
サプライタンク13内に、鉛連続押出し機（図示なし）に
よって押出し成型した鉛管３を巻回したサプライドラム
14を置き、サプライタンク13を真空ポンプ15によって真
空引きして、真空のままアルミニウム連続押出し機６に
導いて鉛管３を芯にしてこの鉛管３の外周面にアルミニ
ウム管２を被覆する。As shown in FIG. 1, a supply drum in which a lead tube 3 extruded by a lead continuous extruder (not shown) is wound in a vacuum supply tank 13 known in OF power cable manufacturing.
14 is placed, the supply tank 13 is evacuated by a vacuum pump 15, and it is guided to the aluminum continuous extruder 6 in a vacuum state to coat the aluminum pipe 2 on the outer peripheral surface of the lead pipe 3 with the lead pipe 3 as a core.
第１図において、16は、複合パイプ１を巻取るドラムを
示している。又複合パイプの断面図は第２図に示すとお
り。In FIG. 1, reference numeral 16 denotes a drum for winding the composite pipe 1. The sectional view of the composite pipe is as shown in FIG.
次に上記鉛管３の両端を密閉し、鉛管３内にガス又は液
体等の圧力媒体を封入することによって、鉛管３をアル
ミニウム管２の内周面に向けて加圧し（例えば、２〜50
kg/cm2）、これにより、鉛管３を矯正してアルミニウム
管２に鉛管３を密着させる。この場合、内圧によって鉛
管３を密着させる方法としては、常温の大気中で鉛管３
を加圧することでも十分であるが、さらに効率よく、ま
た確実に行なうには、前記第１図の電力ケーブル用サプ
ライタンク13にドラムごと再度入れ、タンク13内を特に
真空することは必要でないが、タンク13内に具備してい
る蒸気蛇管に蒸気を通してタンク13内を例えば100〜250
℃に加熱して鉛管３を加圧することが一層好ましい。こ
の際、加熱温度250℃以下にするのは、これ以上だとア
ルミニウム管２の強度が低下してくることと、鉛管３の
強度が大きく下がり、局所的に極端に弱い部分が内圧に
よって損傷を受けるおそれがあるからである。また、鉛
管３の拡管のための内圧の最高値50kg/cm2としたのは、
大口径の複合パイプ１の場合、アルミニウム管２も含め
て変形するおそれがあるからである。また、加圧の方法
も、一時に最高圧力の内圧をかけると、鉛管３の不均一
による局所的な弱点部が損傷を受けるおそれがあるの
で、例えば、5kg/cm2を１時間、その後、10kg/cm2を１
時間、次いで15kg/cm2を１時間というように段階的に設
計上許される最高圧力へと徐々に上昇させてゆくことが
好ましい。Next, both ends of the lead pipe 3 are hermetically sealed, and a pressure medium such as gas or liquid is sealed in the lead pipe 3 to pressurize the lead pipe 3 toward the inner peripheral surface of the aluminum pipe 2 (for example, 2 to 50).
kg / cm 2 ), whereby the lead pipe 3 is corrected and the lead pipe 3 is brought into close contact with the aluminum pipe 2. In this case, as a method of closely contacting the lead tube 3 with the internal pressure,
Although it is sufficient to pressurize the drum, it is not necessary to re-insert the drum together with the drum into the power cable supply tank 13 shown in FIG. , The steam inside the tank 13 is passed through the steam corrugated pipe, for example, 100 to 250
More preferably, the lead tube 3 is pressurized by heating to ℃. At this time, if the heating temperature is set to 250 ° C. or lower, the strength of the aluminum tube 2 will be reduced if the heating temperature is higher than this and the strength of the lead tube 3 will be greatly reduced, and locally extremely weak portions will be damaged by the internal pressure. This is because there is a risk of receiving it. The maximum internal pressure of 50 kg / cm 2 for expanding the lead tube 3 is
This is because in the case of the large-diameter composite pipe 1, the aluminum pipe 2 and the like may be deformed. Also, as for the method of pressurization, if the maximum internal pressure is applied at one time, there is a risk of damage to local weak points due to non-uniformity of the lead pipe 3, so for example, 5 kg / cm 2 for 1 hour, then 10 kg / cm 2 to 1
It is preferable that the pressure is gradually raised to the maximum pressure allowed by the design stepwise such as 15 hours / hour and then 15 kg / cm 2 for 1 hour.
以上のように、この発明によれば、アルミニウム管の内
周面に、耐食性に優れた鉛管が密着した複合パイプを製
造することができる。As described above, according to the present invention, it is possible to manufacture a composite pipe in which a lead pipe having excellent corrosion resistance is closely attached to the inner peripheral surface of the aluminum pipe.
第１図は本願発明である複合パイプの製造方法の一工程
を示す概略図、第２図は複合パイプの断面図である。 １……複合パイプ、２……アルミニウム管、３……鉛
管、６……アルミニウム連続押出し機、FIG. 1 is a schematic view showing one step of a method for manufacturing a composite pipe according to the present invention, and FIG. 2 is a sectional view of the composite pipe. 1 ... Composite pipe, 2 ... Aluminum pipe, 3 ... Lead pipe, 6 ... Aluminum continuous extruder,
Claims (1)
を包み込むことができるアルミニウム連続押出し機に供
給し、上記鉛管を芯にしてこの鉛管の外周を真空に保っ
た状態で、この鉛管の外周面にアルミニウム管を被せ、
この後鉛管内に圧力媒体を封入して鉛管を拡げ、鉛管を
アルミニウム管の内周面に密着させる複合パイプの製造
方法。1. After manufacturing a lead tube, the lead tube is supplied to an aluminum continuous extruder capable of wrapping a long object, and the lead tube is maintained at a vacuum with the lead tube being the core. Cover the outer surface of the lead tube with an aluminum tube,
After that, a pressure medium is sealed in the lead pipe to expand the lead pipe, and the lead pipe is closely attached to the inner peripheral surface of the aluminum pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2033442A JPH0790263B2 (en) | 1990-02-13 | 1990-02-13 | Manufacturing method of composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2033442A JPH0790263B2 (en) | 1990-02-13 | 1990-02-13 | Manufacturing method of composite pipe |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59271593A Division JPS61149682A (en) | 1984-12-21 | 1984-12-21 | Composite pipe, manufacture thereof and heat pipe utilizing said manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0327812A JPH0327812A (en) | 1991-02-06 |
| JPH0790263B2 true JPH0790263B2 (en) | 1995-10-04 |
Family
ID=12386649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2033442A Expired - Lifetime JPH0790263B2 (en) | 1990-02-13 | 1990-02-13 | Manufacturing method of composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0790263B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1815918A1 (en) * | 2006-02-03 | 2007-08-08 | Uponor Innovation Ab | Making an elongated product |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5612204A (en) * | 1979-07-05 | 1981-02-06 | Nippon Filing Co Ltd | Good housing equipment and its carrier |
| JPS58125314A (en) * | 1982-01-20 | 1983-07-26 | Nippon Light Metal Co Ltd | Method and device for production of composite extrudate |
| JPS5949087A (en) * | 1982-09-13 | 1984-03-21 | Sony Corp | Television receiver |
-
1990
- 1990-02-13 JP JP2033442A patent/JPH0790263B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0327812A (en) | 1991-02-06 |
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