JPS60210428A - Manufacture of composite pipe - Google Patents
Manufacture of composite pipeInfo
- Publication number
- JPS60210428A JPS60210428A JP59066373A JP6637384A JPS60210428A JP S60210428 A JPS60210428 A JP S60210428A JP 59066373 A JP59066373 A JP 59066373A JP 6637384 A JP6637384 A JP 6637384A JP S60210428 A JPS60210428 A JP S60210428A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- synthetic resin
- metal
- tube
- metal pipe
- 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
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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/157—Coating linked inserts, e.g. chains
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/151—Coating hollow articles
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、金属管の内周面、及び外周面を合成樹脂で被
覆した投合管の製造方法に関し、更に詳しくは、金属管
の外周面に溶融樹脂を押出して合成樹脂で被覆する際に
、この溶融樹脂の潜熱を利用して金属管内に挿通した合
成樹脂管を熱膨張させ、金属管の外面被覆と同時に内周
面をも被覆するようにした複合管の製造方法に関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for manufacturing a throw tube in which the inner and outer circumferential surfaces of a metal tube are coated with synthetic resin, and more particularly, When extruding molten resin and coating it with synthetic resin, the latent heat of this molten resin is used to thermally expand the synthetic resin tube inserted into the metal tube, thereby coating the inner circumferential surface of the metal tube at the same time. The present invention relates to a method of manufacturing such a composite pipe.
（従来技術）
従来、この種複合管の”ＩＡ造方法は、金属管内に熱膨
張性を有づる合成樹脂管を挿通し、該合成樹脂管を熱膨
張させて金属管の内面被覆を行ない、次いで、この金属
管の外面を加熱してからクロスへラドダイ内に導き、該
ダイから押出した溶融樹脂で金属管の外周面を被覆して
いた。(Prior Art) Conventionally, the IA manufacturing method for this type of composite pipe involves inserting a thermally expandable synthetic resin pipe into a metal pipe, thermally expanding the synthetic resin pipe to coat the inner surface of the metal pipe, and Next, the outer surface of this metal tube was heated, and then introduced into a rad die through a cloth, and the outer circumferential surface of the metal tube was coated with the molten resin extruded from the die.
しかしながら、この製造方法では、合成樹脂管を熱膨張
させるための加熱工程と、溶融樹脂との密着性を良好に
するために金属管を加熱する工程とが別個の独立した工
程で行なわれ、しかも、この金属管の加熱工程は、熱膨
張した合成樹脂管を冷却してから行なわれていたので、
熱エネルギーの損失が大きいという問題があった。However, in this manufacturing method, the heating process for thermally expanding the synthetic resin tube and the heating process for the metal tube to improve adhesion with the molten resin are performed in separate and independent processes. The heating process for this metal tube was carried out after cooling the thermally expanded synthetic resin tube.
There was a problem in that the loss of thermal energy was large.
（発明の目的）
本発明は、従来のかかる複合管の製造方法を省エネルギ
ーの而から改善したものであって、熱エネルギーの有効
活用を計った複合管の製造方法を提供するものである。(Objective of the Invention) The present invention improves the conventional method for manufacturing a composite pipe in terms of energy saving, and provides a method for manufacturing a composite pipe that makes effective use of thermal energy.
（発明の構成） 以下、本発明の一実施例を図面にて説明する。(Structure of the invention) An embodiment of the present invention will be described below with reference to the drawings.
尚、以下の説明は本発明の一実施例を示すものであって
、本発明は必ずしこの実施例にのみ限定されるものでは
なく、本発明の要旨を過膜しない範囲で種々の構成をと
ることかできる。The following description shows one embodiment of the present invention, and the present invention is not necessarily limited to this embodiment, and various configurations may be made without overcoming the gist of the present invention. I can take it.
図面は本発明の製造工程を示ず縦断面図であって、符号
１は鋼管、アルミニウム管等の金属管、２は塩化ビニル
樹脂、ポリエチレン樹脂等の熱可塑性合成樹脂からなる
合成樹脂管である。The drawing does not show the manufacturing process of the present invention, but is a longitudinal cross-sectional view, and numeral 1 is a metal pipe such as a steel pipe or aluminum pipe, and 2 is a synthetic resin pipe made of a thermoplastic synthetic resin such as vinyl chloride resin or polyethylene resin. .
合成樹脂管２は、加熱すると径が拡大する熱膨張性を有
し、その外径は金属管１の内径より若干小さ目に形成さ
れている。The synthetic resin tube 2 has a thermal expandability that expands in diameter when heated, and its outer diameter is slightly smaller than the inner diameter of the metal tube 1.
３は熱風、赤外線加熱、高周波誘導加熱等からなる加熱
装置、４はクロスへラドダイ、５は前記ダイ４から押出
さねた溶融樹脂、６は冷却水槽、７は引取機である。3 is a heating device consisting of hot air, infrared heating, high frequency induction heating, etc., 4 is a cross-to-rad die, 5 is the molten resin extruded from the die 4, 6 is a cooling water tank, and 7 is a take-up machine.
本発明の製造方法は、まず合成樹脂管２の外周面、又は
金属管１の内周面に接着剤を塗布し、該金属管１内に合
成樹脂管２を挿通する。In the manufacturing method of the present invention, first, an adhesive is applied to the outer circumferential surface of the synthetic resin tube 2 or the inner circumferential surface of the metal tube 1, and the synthetic resin tube 2 is inserted into the metal tube 1.
そして、□この合成樹脂管２が挿通された金属管１をコ
ア部ＩＪ １０を介して順次接合し、加熱装置３内に搬
入ηる。Then, the metal tubes 1 into which the synthetic resin tubes 2 have been inserted are sequentially joined via the core portion IJ 10 and transported into the heating device 3.
加熱装置３内に搬入された金属管１は、その外周面が加
熱されると、該金属管１内に挿通された合成樹脂管２が
間接的に所定温度になるまで加熱される。When the outer peripheral surface of the metal tube 1 carried into the heating device 3 is heated, the synthetic resin tube 2 inserted into the metal tube 1 is indirectly heated until it reaches a predetermined temperature.
この加熱装置３内での予熱工程は、金属管の外周面を昇
温することによって、次の外面被覆の際に溶融樹脂５ど
の密着性を良好にするど共に、合成樹脂管２が熱膨張を
開始する温度まで加熱することを目的どり゛るものであ
り、合成樹脂管２の外周面にホットメルト型接着剤を塗
布した場合には、この予熱−［稈で接着剤が溶融状態に
なるまで加熱する。This preheating step in the heating device 3 increases the temperature of the outer circumferential surface of the metal tube to improve adhesion to the molten resin 5 during the next outer surface coating, and also causes thermal expansion of the synthetic resin tube 2. The purpose of this is to heat the hot melt adhesive to the temperature at which it starts to melt. Heat until.
従って、合成樹脂管２どして、塩化ビニル樹脂管を用い
た場合には、この予熱工程で金属管１の表面を１３０〜
１７０度に加熱し、これによって合成樹脂管２を８０度
以上の温度になるまで加熱するどよい。Therefore, when a vinyl chloride resin pipe is used as the synthetic resin pipe 2, the surface of the metal pipe 1 is
It is best to heat the synthetic resin pipe 2 to 170 degrees Celsius, thereby heating the synthetic resin pipe 2 to a temperature of 80 degrees Celsius or more.
次に、この所定温度に予熱した金属管１をクロスへラド
ダイ４内に導き、該ダイ４から押出された溶融樹脂５に
よって金属管１の外周面を被覆する。Next, the metal tube 1 preheated to a predetermined temperature is introduced into the rad die 4 through a cross, and the outer peripheral surface of the metal tube 1 is covered with the molten resin 5 extruded from the die 4.
金属管１の外周面が高温度の溶融樹脂５によって被覆さ
れるど、該溶融樹脂５の潜熱によって金属管１内に挿通
された合成樹脂管２は加熱されて熱膨張し、金属管１の
内周面は合成樹脂管２によってに完全に密着被覆される
。While the outer peripheral surface of the metal tube 1 is coated with the high-temperature molten resin 5, the synthetic resin tube 2 inserted into the metal tube 1 is heated and thermally expanded by the latent heat of the molten resin 5, causing the metal tube 1 to expand thermally. The inner circumferential surface is completely tightly covered by the synthetic resin pipe 2.
このようにして、内周面、及び外周面が合成樹脂で被覆
された金属管１は、冷却水槽６を通過する間に冷却され
て固化し、引取機７で引取られてる。イして、この複合
管は、金属管同士を接続したコア部材１０の部分で切断
され、所定長さの管が得られる。In this way, the metal tube 1 whose inner peripheral surface and outer peripheral surface are coated with synthetic resin is cooled and solidified while passing through the cooling water tank 6, and is taken away by a taking machine 7. This composite tube is then cut at the core member 10 that connects the metal tubes to obtain a tube of a predetermined length.
（発明の効果）
以上の通り、本発明の製造方法は、合成樹脂管５−
を熱膨張さｌるに必要な温度まで加熱する■稈と、金属
管の外周面を加熱して溶融樹脂との密着性を良好にする
だめの加熱１稈とを加熱装置内で同時に行ない、次いで
、この予熱されたこれらの管をクロスヘッドダイ内に導
き、金属管の外周面を合成樹脂で被覆すると共に、この
溶融樹脂の潜熱を利用して金属管内に挿通した合成樹脂
管を熱膨張させるので、製造工程が簡素化できるだけで
なく、熱エネルギーの無駄がな（なり、外観が優れ、か
つ性能的にも従来法によって得られた複合管と遜色のな
い管が得られる。(Effects of the Invention) As described above, the manufacturing method of the present invention heats the culm of the synthetic resin pipe 5 to a temperature necessary for thermal expansion, and heats the outer peripheral surface of the metal pipe to produce molten resin. The preheated tubes are heated simultaneously in a heating device to improve the adhesion of the metal tubes, and then these preheated tubes are introduced into a crosshead die, and the outer peripheral surface of the metal tubes is coated with a synthetic resin. The latent heat of this molten resin is used to thermally expand the synthetic resin tube inserted into the metal tube, which not only simplifies the manufacturing process, but also eliminates wasted thermal energy, provides an excellent appearance, and improves performance. Also, a tube comparable to the composite tube obtained by the conventional method can be obtained.
図面は、本発明の一実施例を示す工程の縦断面図である
。
１・・・・・・金属管、２・・・・・・合成樹脂管３・
・・・・・加熱装置、４・・・・・・クロスへラドダイ
５・・・・・・溶融樹脂、６・・・・・・冷却水槽７・
・・・・・引取機
６−The drawings are longitudinal sectional views of steps showing an embodiment of the present invention. 1...Metal pipe, 2...Synthetic resin pipe 3.
... Heating device, 4 ... RAD die to cross 5 ... Molten resin, 6 ... Cooling water tank 7.
...Collection machine 6-
Claims (1)
たり、金属管（１）内に熱膨張性を有する合成樹脂管（
２）を挿通し、これを加熱装置（３）内に搬入して管（
１）、（２）を所定温度に予熱１．、次いでクロスへラ
ドダイ（４）内を通過させて該ダイ（４）から押出した
溶融樹脂（５）で金属管（１）の外周面を被覆すると共
に、該溶融樹脂（５）の潜熱を利用して熱膨張させた合
成樹脂管（２）を金属管（１）の内周面に密着させたこ
とを特徴とする複合管の製造方法。When covering the inner and outer peripheral surfaces of the metal tube with synthetic resin, a thermally expandable synthetic resin tube (
2), and carry it into the heating device (3) to heat the tube (
Preheating 1) and (2) to a predetermined temperature 1. Then, the outer circumferential surface of the metal tube (1) is coated with the molten resin (5) extruded from the die (4) by passing through the RAD die (4) into the cross, and the latent heat of the molten resin (5) is utilized. A method for manufacturing a composite pipe, characterized in that a synthetic resin pipe (2) which has been thermally expanded by the above process is brought into close contact with the inner circumferential surface of a metal pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59066373A JPS60210428A (en) | 1984-04-03 | 1984-04-03 | Manufacture of composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59066373A JPS60210428A (en) | 1984-04-03 | 1984-04-03 | Manufacture of composite pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60210428A true JPS60210428A (en) | 1985-10-22 |
Family
ID=13313956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59066373A Pending JPS60210428A (en) | 1984-04-03 | 1984-04-03 | Manufacture of composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60210428A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01145120A (en) * | 1987-11-30 | 1989-06-07 | Nippon Steel Corp | Coating method of metallic pipe whose inside and outside are coated |
| JPH0186525U (en) * | 1987-11-30 | 1989-06-08 | ||
| JPH03292486A (en) * | 1990-04-06 | 1991-12-24 | Somar Corp | Synthetic resin coated pipe and manufacture thereof |
| JPH04303622A (en) * | 1991-03-30 | 1992-10-27 | Nkk Corp | Inner and outer surface simultaneously lining method of polyvinyl chloride-lined steel pipe |
| EP1815918A1 (en) * | 2006-02-03 | 2007-08-08 | Uponor Innovation Ab | Making an elongated product |
-
1984
- 1984-04-03 JP JP59066373A patent/JPS60210428A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01145120A (en) * | 1987-11-30 | 1989-06-07 | Nippon Steel Corp | Coating method of metallic pipe whose inside and outside are coated |
| JPH0186525U (en) * | 1987-11-30 | 1989-06-08 | ||
| JPH03292486A (en) * | 1990-04-06 | 1991-12-24 | Somar Corp | Synthetic resin coated pipe and manufacture thereof |
| JPH04303622A (en) * | 1991-03-30 | 1992-10-27 | Nkk Corp | Inner and outer surface simultaneously lining method of polyvinyl chloride-lined steel pipe |
| EP1815918A1 (en) * | 2006-02-03 | 2007-08-08 | Uponor Innovation Ab | Making an elongated product |
| EP1986799A4 (en) * | 2006-02-03 | 2010-01-13 | Uponor Innovation Ab | Making an elongated product |
| AU2007211455B2 (en) * | 2006-02-03 | 2012-07-05 | Uponor Innovation Ab | Making an elongated product |
| US8453310B2 (en) | 2006-02-03 | 2013-06-04 | Uponer Innovation AB | Making an elongated product |
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