JPS62267132A - Manufacture of plastic clad steel tube - Google Patents
Manufacture of plastic clad steel tubeInfo
- Publication number
- JPS62267132A JPS62267132A JP61111223A JP11122386A JPS62267132A JP S62267132 A JPS62267132 A JP S62267132A JP 61111223 A JP61111223 A JP 61111223A JP 11122386 A JP11122386 A JP 11122386A JP S62267132 A JPS62267132 A JP S62267132A
- Authority
- JP
- Japan
- Prior art keywords
- plastic
- coat
- large number
- steel tube
- steel 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 37
- 239000010959 steel Substances 0.000 title claims abstract description 37
- 239000004033 plastic Substances 0.000 title claims abstract description 28
- 229920003023 plastic Polymers 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 12
- 239000004698 Polyethylene Substances 0.000 claims abstract description 6
- -1 polyethylene Polymers 0.000 claims abstract description 6
- 229920000573 polyethylene Polymers 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 17
- 238000001816 cooling Methods 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract 1
- 239000006223 plastic coating Substances 0.000 description 17
- 239000002985 plastic film Substances 0.000 description 7
- 229920006255 plastic film Polymers 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004804 winding Methods 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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
- B29C59/043—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for profiled articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、外表面が熱可塑性樹脂被膜により被覆された
鋼管で、前記樹脂被膜の表面にコンクリートコーティン
グを施すことを前提としたプラスチック被覆鋼管の製造
方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the manufacture of plastic-coated steel pipes whose outer surfaces are coated with a thermoplastic resin film, with the premise that a concrete coating is applied to the surface of the resin film. Regarding the method.
従来の技術
海底ラインパイプ等水中に鋼管を敷設する場合、腐食防
止のため鋼管の外表面をポリエチレン等プラスチックに
より被覆し、更に該被覆した面における疵の発生を防止
すると共に重量を増して海底等水中に敷設後の安定性を
増大させるため、一般に前記プラスチック被覆鋼管を厚
さ３０〜４０龍のコンクリートで覆うコンクリートコー
ティングを施す。その際、前記ポリエチレン等により被
覆した表面とコンクリートとの密着性を向上させるため
にプラスチック被覆鋼管の表面に凹凸を形成することが
行なわれる。Conventional technology When laying steel pipes underwater, such as submarine line pipes, the outer surface of the steel pipe is coated with plastic such as polyethylene to prevent corrosion, and the coated surface is further prevented from forming scratches, and the weight is increased, making it difficult to install on the seabed or the like. In order to increase the stability after installation in water, the plastic coated steel pipe is generally covered with a concrete coating of 30 to 40 mm thick. At this time, in order to improve the adhesion between the surface coated with polyethylene or the like and concrete, irregularities are formed on the surface of the plastic-coated steel pipe.
従来、前記プラスチック被覆鋼管の表面に凹凸を形成す
る方法としては、
（１） 特開昭５１−５９９６０号公報にみられるよ
うに、鋼管にプラスチック被覆を施した直後表面を急激
に不均一に冷却し、被膜表面に多数の凹凸を形成する方
法、
■ 特開昭５３−１３６０７４号公報にみられるように
、プラスデック押出機のダイスを鋼管の軸方向に往復運
動させプラスチックを断続的に膨出させて凹凸を形成す
る方法、
（３） 特開昭５１−５００５０号公報にみられるよ
うに、鋼管にｆｍＶ体を巻きつけて凹凸を形成する方法
、
（４） 特開昭５８−１１０８４５号公報にみられる
ように冷却したプラスチック被膜に加熱した６付ロール
を押し付４Ｊて凹凸を形成する方法、等が公知である。Conventionally, methods for forming irregularities on the surface of the plastic-coated steel pipe include: (1) As seen in Japanese Patent Laid-Open No. 51-59960, the surface is rapidly and non-uniformly cooled immediately after the plastic coating is applied to the steel pipe. A method of forming a large number of irregularities on the surface of the coating, ■ As shown in Japanese Patent Application Laid-open No. 136074/1983, the die of the Plus Deck extruder is moved reciprocatingly in the axial direction of the steel pipe to intermittently swell the plastic. (3) A method of forming unevenness by winding an fmV body around a steel pipe as shown in JP-A-51-50050; (4) JP-A-58-110845 A method of forming unevenness by pressing a heated 6-rolled roll 4J onto a cooled plastic film is known.
発明が解決しようとする問題点
しかしながら上記従来の方法において、０）のプラスチ
ック被覆直後表面を急激に不均一冷却する方法において
は冷却のコントｉｊ−ルが難しく、表面に均一に分散し
た凹凸を形成させることが困難であり、■のダイスを０
゜復運動させる方法は大型の設備を要するため設備費が
かさみ、（３）のＩｎｎ鉢体巻きつける方法は鋼管の全
周を被包するダイスを用い樹脂を筒状に鋼管表面に押し
出して被覆する丸ダイ方式では自動化することが難しい
。また、（４）の冷却したプラスチック被膜に加熱した
６付ロールを押し付ける方法は従来用いられている方法
のうちでは最も効果的であるが、前記丸ダイ方式には適
用できず、またロールを加熱するための設備を要すると
いう問題があった。Problems to be Solved by the Invention However, in the conventional method described above, it is difficult to control the cooling in the method of 0) in which the surface is rapidly non-uniformly cooled immediately after being coated with plastic, and unevenness is formed evenly distributed on the surface. It is difficult to do so, and the die of ■ is 0.
゜The method of reciprocating requires large equipment, which increases the equipment cost, while the method (3) of wrapping the Inn pot body uses a die that covers the entire circumference of the steel pipe, and extrudes resin onto the surface of the steel pipe in a cylindrical shape to cover it. It is difficult to automate the round die method. In addition, the method (4) of pressing a heated roll with a 6-piece on the cooled plastic coating is the most effective of the conventionally used methods, but it cannot be applied to the round die method, and the roll is heated. There was a problem in that it required equipment to do so.
本発明は上記従来の問題を解決する方法を提供すること
を目的とする。The present invention aims to provide a method for solving the above-mentioned conventional problems.
問題点を解決するための手段
本発明は上記目的をもってなされたものであって、その
要旨とするところは鋼管の外表面をポリエチレン等の熱
可塑性樹脂により連続的に被覆してプラスチック被覆鋼
管を製造する方法において、被覆された樹脂被膜を直ち
に６０℃ないし１５０℃まで冷却し、ついで表面に多数
の突出部を有する鼓型のロールを前記樹脂被膜に押しつ
けることにより該樹脂被膜に多数の凹部を形成すること
を特徴とするプラスチック被覆鋼管の製造方法にある。Means for Solving the Problems The present invention has been made for the above-mentioned purpose, and its gist is to manufacture a plastic-coated steel pipe by continuously coating the outer surface of a steel pipe with a thermoplastic resin such as polyethylene. In the method, the coated resin film is immediately cooled to 60° C. to 150° C., and then a drum-shaped roll having a large number of protrusions on the surface is pressed against the resin film to form a large number of recesses in the resin film. A method of manufacturing a plastic-coated steel pipe is provided.
以下、図に基づいて説明する。The explanation will be given below based on the figures.
第１図は本発明を実施するための装置の一例の構成を示
す説明図である。同図において、プラスチック被覆を施
す鋼管０）を被包してダイス（２）が設けられ、ついで
被覆されたプラスチック被覆を冷却するための冷却段Ｗ
（３１、前記プラスチック被膜に多数の凹部を形成す
るための２台の圧着ロール（４）、■が連設され、最後
に再び冷却設備（６）が配置される。圧着ロール（４）
、 （５）は押し付は方向が互に直交するように設けら
れる。前記冷却設備（３）と圧着ロール（４）との間に
は前記プラスチック被膜の表面温度を検出するための温
度計ωが取り付けられ、冷却設備（３）へ水槽（８）か
ら冷却水を供給する配管（９）に取り付けられた流量調
整弁（Ｉｎと接続される。FIG. 1 is an explanatory diagram showing the configuration of an example of an apparatus for carrying out the present invention. In the same figure, a die (2) is provided to enclose a steel pipe 0) to be coated with plastic, and then a cooling stage W is provided for cooling the plastic coating.
(31. Two pressure rolls (4) and (2) are installed in series to form a large number of recesses in the plastic film, and finally, cooling equipment (6) is placed again. Pressure rolls (4)
, (5), the directions of the pressing directions are orthogonal to each other. A thermometer ω for detecting the surface temperature of the plastic coating is installed between the cooling equipment (3) and the pressure roll (4), and cooling water is supplied from the water tank (8) to the cooling equipment (3). It is connected to the flow rate regulating valve (In) attached to the pipe (9).
第２図は前記圧む「１−ルの拡大図で、（イ）図は正面
図、（ロ）図は側面図である。ト１図において、圧着ロ
ール（４）は口・−ル表面全体にわたり多数の突出部０
θを有し、プラスチック被覆を施された鋼管０４１の断
面形Ｖに適合するようにロール中央部がロール軸０２１
側に湾曲して鼓型をなしている。第３図は圧着ロールの
他の例をｉ（＜ず説明図で、圧着ロール（４）は径の異
る複数個のロールに分割することができる。すなわち前
記圧着ロール（４）はそれ４れ全周にわたり突出部ＯＤ
を有する複数個の狭幅のロールを共通のロール軸Ｏｂを
用いて該ロール軸ＱＸ５のまわりに回動可能に重ね合せ
たもので、ロール軸０Ｘ５（７）中央部に最短径のロー
ル０３を配し、中央部から離れるに従い漸次長径のロー
ル０３を配して一体化し、前記第２図に示した圧着ロー
ルと同様に全体として鼓型をなすように構成される。Fig. 2 is an enlarged view of the press roll 1, in which Fig. 1 is a front view and Fig. 2 is a side view. Numerous protrusions throughout 0
θ, and the center of the roll is aligned with the roll axis 021 so as to match the cross-sectional shape V of the plastic-coated steel pipe 041.
It curves to the side to form a drum shape. FIG. 3 is an explanatory diagram showing another example of the pressure roll (4), and the pressure roll (4) can be divided into a plurality of rolls having different diameters. The protrusion OD extends all around the circumference.
A plurality of narrow rolls having a common roll axis Ob are stacked so as to be rotatable around the roll axis QX5, and the roll 03 with the shortest diameter is placed in the center of the roll axis 0X5 (7). Rolls 03 having a longer diameter are arranged and integrated with each other as they move away from the center, and the whole is configured to form a drum shape, similar to the pressure roll shown in FIG. 2.
プラスチック被膜の冷却温度を６０℃ないし１５０℃と
限定したのは、６０℃未溝であるとプラスチック被膜が
硬く充分な深さを有する凹部が形成されず、１５０℃を
超えるとプラスチック被膜が軟らかすぎ形成された凹部
の形が崩れ目的とする形吠が得られないためである。The reason why we limited the cooling temperature of the plastic film to 60°C to 150°C is because if it is not grooved at 60°C, the plastic film will be hard and a recess with sufficient depth will not be formed, and if it exceeds 150°C, the plastic film will be too soft. This is because the formed recess loses its shape and the desired shape cannot be obtained.
圧着ロール（４）、（へ）に鼓型のロールを用いるのは
、断面が円形のプラスチック被覆鋼管０４の表面にプラ
スチック被覆ラインと同一のライン上で凹部を形成する
ことが通常のフラットなロールでは困難なためである。The reason why the drum-shaped rolls are used for the crimping rolls (4) and (f) is that they are flat rolls that form recesses on the same line as the plastic coating line on the surface of the plastic-coated steel pipe 04, which has a circular cross section. This is because it is difficult.
また、圧着ロール（４１，５１表面の突出部０υの形状
は一般的には断面が直径１〜３．１の円形で、高さ１〜
２−の柱Ｖとするのが直切であるが、断面形状は正方形
、長方形等でもよく、大きさおよび高さはブシスチック
被覆表面とコンクリートとの間で必要とされるｖｃ行強
度に応じて定めればよい。In addition, the shape of the protrusion 0υ on the surface of the pressure roll (41, 51) is generally circular in cross section with a diameter of 1 to 3.1 mm and a height of 1 to 3.1 mm.
The column V of 2- is a straight cut, but the cross-sectional shape may be square, rectangular, etc., and the size and height are determined according to the vc line strength required between the bushistic coating surface and the concrete. Just set it.
冷却設備（３１，（６）としては、通常プラスチック被
覆面を散水により直接冷却できる設備が用いられるが、
被覆材の種類によっては空冷その他適切な冷却設備を用
いてもよい。As the cooling equipment (31, (6)), equipment that can directly cool the plastic coated surface by sprinkling water is usually used.
Depending on the type of coating material, air cooling or other appropriate cooling equipment may be used.
温度計（７）は放射温度１１その他プラスチック被覆面
の温度を比較的精度良く測定でき、流量調整弁ＯＩに接
続してこれを作動させ得る方式のものであればいずれも
使用可能である。Any thermometer (7) can be used as long as it can measure the temperature of the radiation temperature 11 and other plastic-coated surfaces with relatively high accuracy, and can be connected to the flow rate regulating valve OI to operate it.
作 用
上記のように構成された装置を用いて本発明を実施する
には、前記第１図において、まずダイスのから筒吠に押
出された樹脂により鋼管（鳳）表面に形成された２００
〜２５０℃の温度を有するプラスチック被膜を直ちに冷
却設備（３）で散水により冷却する。冷却後のプラスチ
ック被膜の温度は温度計（７）で連続測定され、該被膜
温度が常に６０〜１５０℃の範囲に入るように流量調整
弁頭により冷却水量が調節される。ついで前記プラスチ
ック被膜を表面に多数の突出部０υを有する鼓型の２台
の圧着ロール（４）、（５）で、最初上下から、次に左
右から押し付は前記プラスチック被膜表面に多数の凹部
を形成させ、冷却設備（３）で散水により常温まで冷却
する。これによりプラスチック被覆鋼管の表面に多数の
凹凸を形成することができる。Operation To carry out the present invention using the apparatus configured as described above, first, in FIG.
The plastic coating, which has a temperature of ˜250° C., is immediately cooled by water spray in a cooling installation (3). The temperature of the plastic film after cooling is continuously measured with a thermometer (7), and the amount of cooling water is adjusted by a flow rate regulating valve head so that the film temperature is always within the range of 60 to 150°C. Next, the plastic film is pressed with two drum-shaped pressure rolls (4) and (5) having a large number of protrusions 0υ on the surface, first from above and below, and then from the left and right. is formed and cooled to room temperature by water sprinkling in the cooling equipment (3). As a result, a large number of irregularities can be formed on the surface of the plastic-coated steel pipe.
なお、圧着ロール（４）、（２）として第３図に示した
分割可能なロールを用いれば、該分割可能なロールを構
成する複数個の狭幅のロール０３はロール軸Ｏｂに回動
可能に皐り付けられているので、圧着の際前記各ロール
６３の周速度はロール０３径の長短によらず一定となり
、前記プラスチック被覆鋼管の全表面にロール０′３の
突出部θυの形状と同一で形くずれのない均一な凹部を
形成することができる。Note that if the splittable rolls shown in FIG. 3 are used as the pressure rolls (4) and (2), the plurality of narrow rolls 03 constituting the splittable rolls can be rotated about the roll axis Ob. Therefore, during crimping, the circumferential speed of each roll 63 is constant regardless of the length of the diameter of the roll 03, and the shape of the protrusion θυ of the roll 0'3 is formed on the entire surface of the plastic-coated steel pipe. It is possible to form a uniform concave portion that is identical and does not lose its shape.
実 施 例 以下、実施例に基づいて説明する。Example The following will explain based on examples.
を被覆したプラスチック被覆鋼管に対し、前記第１図に
示した構成をｆ「する装置を用いて本発明方法を実施し
、プラスチック被膜の温度の違いによる該被膜表面に形
成された凹部の深さの変化および前記凹部の深さに対す
るプラスチック被膜と該被膜上にコーティングされたコ
／クリ−１との間のせん断力の変化を調査した。圧着ロ
ールは表面に断面が直径２ＩＩＩＩの円形で高さ２−一
の柱吠の突出部を多数有する、前記第３図に示した分割
可能なロールを用い、圧下荷重１５０ ｋｇｓライン速
度速度１５公／した。冷却後のプラスチック被膜温度を
測定する温度計としては放射温度計を用いた。The method of the present invention is carried out on a plastic-coated steel pipe coated with a plastic coating using an apparatus having the configuration shown in FIG. The changes in the shear force between the plastic coating and the Co/Cry-1 coated on the plastic coating with respect to the depth of the recess were investigated. 2-1 The separable roll shown in Fig. 3 having a large number of protruding parts of the pillars was used, and the rolling load was 150 kgs and the line speed was 15 km/h.Thermometer for measuring the temperature of the plastic coating after cooling A radiation thermometer was used.
結果をｗＥ４図およびｉ￥５図に示す。第４図において
、横軸はプラスチック被膜の温度を、線軸は該被膜表面
に形成された四部の深さを示し、第５図において、横軸
は四部の深さを、絣軸はプラスチック被膜とコンクリ−
トとの間のせん断力を示す。第４図から被膜温度が６０
℃以上であれば被膜表面に四部が形成され、１３０〜１
５０℃で圧着口・−ルの突出部の高さに相当する深さの
凹部となり、第５図から凹部の深さが深いほどせん断力
が大きくなることがわかる。The results are shown in Figure wE4 and Figure i\5. In Fig. 4, the horizontal axis indicates the temperature of the plastic coating, and the linear axis indicates the depth of the four parts formed on the surface of the coating. In Fig. 5, the horizontal axis indicates the depth of the four parts, and the Kasuri axis indicates the plastic coating. concrete
Indicates the shear force between the From Figure 4, the film temperature is 60
℃ or higher, four parts are formed on the surface of the coating, and the temperature is 130 to 1
At 50[deg.] C., a recess is formed with a depth corresponding to the height of the protrusion of the crimp opening, and from FIG. 5 it can be seen that the deeper the recess, the greater the shearing force.
また、コンクリートコーティングしたプラスチック被覆
鋼管を船上から海底へ敷設する場合、前記被覆鋼管の軸
方向にコーティングしたコンクリートの重量がかかり、
前記プラスチック被膜とコンクリートとの間には通常５
ｋｇ／ｃＪ程度のせん断力が作用するが、第４図および
第５図から被膜温度が６０℃以上であれば被膜表面の凹
部の深さは０、３ ＋ｕ＋以上となり５ｋｇ／ｃＪ以上
のせん断力を有することがわかる。Furthermore, when a concrete-coated plastic-coated steel pipe is laid from a ship to the seabed, the weight of the coated concrete is applied in the axial direction of the coated steel pipe.
Between the plastic coating and the concrete, there is usually 5
A shearing force of about kg/cJ acts, but from Figures 4 and 5, if the coating temperature is 60°C or higher, the depth of the recess on the coating surface is 0.3+u+ or more, and a shearing force of 5kg/cJ or more. It can be seen that it has
発明の詳細
な説明したように、鋼管の外表面に被覆されたポリエチ
レン等の熱可塑性樹脂被膜を直ちに所定温度範囲まで冷
却し、表面に多数の突出部を有する鼓型のロールにより
前記被膜に多数の凹凸を形成する本発明方法は、鋼管に
ラセン運動をさせる必要がないので鋼管の全周を被包す
るダイスを用いる丸グイ方式のプラスチック被覆ライン
に適用可能で、該プラスチック被覆ラインと同一ライン
上で後続して行なうことができ、生産能率を著しく向上
させることができる。また、樹脂被覆の過程で被覆樹脂
の保イ１熱を利用して樹脂が完全硬化する前に凹凸を形
成するので、従来方法におけるようなロールの加熱が不
要で、圧着力も極めて小さくてよいという利点も有して
いる。As described in detail of the invention, a thermoplastic resin coating such as polyethylene coated on the outer surface of a steel pipe is immediately cooled to a predetermined temperature range, and a drum-shaped roll having a large number of protrusions on the surface is used to apply a large number of coatings to the coating. The method of the present invention for forming the unevenness of the steel pipe does not require helical movement on the steel pipe, so it can be applied to a round-pull type plastic coating line that uses a die that covers the entire circumference of the steel pipe, and can be applied to the same line as the plastic coating line. This can be carried out subsequently, and the production efficiency can be significantly improved. In addition, during the resin coating process, the heat retention of the coating resin is used to form the unevenness before the resin is completely cured, so there is no need to heat the rolls as in conventional methods, and the pressing force can be extremely small. It also has advantages.
第１図ないし第３図は本発明方法を実施するための装置
の一例の構成を示す説明図で、第１図は全体構成図、第
２図および第３図は第１図の圧着ロールの拡大図、第４
図はプラスチック被覆鋼管の表面に形成された四部の深
さと形成時のプラスチック被膜の温度との関係を示す線
図、第５図はプラスチック被Ｑ鋼管の表面に形成された
四部の深さに対するプラスチック被膜と該被膜上にコー
ティングされたコンクリートとの間のせん断力の変化を
示す線図である。1 to 3 are explanatory diagrams showing the configuration of an example of an apparatus for carrying out the method of the present invention. FIG. 1 is an overall configuration diagram, and FIGS. Enlarged view, 4th
The figure is a diagram showing the relationship between the depth of the four parts formed on the surface of a plastic-coated steel pipe and the temperature of the plastic coating at the time of formation. Figure 5 shows the relationship between the depth of the four parts formed on the surface of a plastic-covered steel pipe and the plastic coating. FIG. 2 is a diagram showing the change in shear force between a coating and concrete coated on the coating.
Claims (2)
より連続的に被覆してプラスチック被覆鋼管を製造する
方法において、被覆された樹脂被膜を直ちに６０℃ない
し１５０℃まで冷却し、ついで表面に多数の突出部を有
する鼓型のロールを前記樹脂被膜に押しつけることによ
り該樹脂被膜に多数の凹部を形成することを特徴とする
プラスチック被覆鋼管の製造方法。(1) In a method of manufacturing plastic-coated steel pipes by continuously coating the outer surface of a steel pipe with a thermoplastic resin such as polyethylene, the coated resin film is immediately cooled to 60°C to 150°C, and then a large number of resin coatings are applied to the surface. 1. A method for manufacturing a plastic-coated steel pipe, which comprises forming a large number of recesses in the resin coating by pressing an drum-shaped roll having a protrusion of 1.
割可能である特許請求の範囲第１項記載のプラスチック
被覆鋼管の製造方法。(2) The method for manufacturing a plastic-coated steel pipe according to claim 1, wherein the drum-shaped roll can be divided into a plurality of rolls in the direction of the rotation axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61111223A JPS62267132A (en) | 1986-05-15 | 1986-05-15 | Manufacture of plastic clad steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61111223A JPS62267132A (en) | 1986-05-15 | 1986-05-15 | Manufacture of plastic clad steel tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62267132A true JPS62267132A (en) | 1987-11-19 |
Family
ID=14555658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61111223A Pending JPS62267132A (en) | 1986-05-15 | 1986-05-15 | Manufacture of plastic clad steel tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62267132A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0623826A (en) * | 1992-07-08 | 1994-02-01 | Nkk Corp | Cooling method for plastic-coated steel pipe and auxiliary cooling device |
| WO2009081844A1 (en) * | 2007-12-26 | 2009-07-02 | Terumo Kabushiki Kaisha | Medical long element, method for manufacturing the same, and apparatus for manufacturing the same |
-
1986
- 1986-05-15 JP JP61111223A patent/JPS62267132A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0623826A (en) * | 1992-07-08 | 1994-02-01 | Nkk Corp | Cooling method for plastic-coated steel pipe and auxiliary cooling device |
| WO2009081844A1 (en) * | 2007-12-26 | 2009-07-02 | Terumo Kabushiki Kaisha | Medical long element, method for manufacturing the same, and apparatus for manufacturing the same |
| US8613878B2 (en) | 2007-12-26 | 2013-12-24 | Terumo Kabushiki Kaisha | Medical elongate member, method of manufacturing the same, and apparatus for manufacturing the same |
| JP5619426B2 (en) * | 2007-12-26 | 2014-11-05 | テルモ株式会社 | Medical long body, method for manufacturing the same, and apparatus for manufacturing the same |
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