JPS5991025A - Device for covering pipe - Google Patents

Device for covering pipe

Info

Publication number
JPS5991025A
JPS5991025A JP57201397A JP20139782A JPS5991025A JP S5991025 A JPS5991025 A JP S5991025A JP 57201397 A JP57201397 A JP 57201397A JP 20139782 A JP20139782 A JP 20139782A JP S5991025 A JPS5991025 A JP S5991025A
Authority
JP
Japan
Prior art keywords
extruder
resin
sheet
passage
cylindrical
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
Application number
JP57201397A
Other languages
Japanese (ja)
Inventor
Shozo Nagao
長尾　正三
Yoshinobu Ohashi
大橋　義信
Masaaki Nakatani
中谷　正昭
Hajime Ninomiya
一 二宮
Shoji Sasaki
佐々木　昌治
Kanichi Kido
木戸　貫一
Yoshinori Ichikawa
市川　嘉紀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YOKOHAMA KAGAKU KIKAI KK
Tonen Chemical Corp
Kubota Corp
Original Assignee
YOKOHAMA KAGAKU KIKAI KK
Tonen Sekiyu Kagaku KK
Kubota Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by YOKOHAMA KAGAKU KIKAI KK, Tonen Sekiyu Kagaku KK, Kubota Corp filed Critical YOKOHAMA KAGAKU KIKAI KK
Priority to JP57201397A priority Critical patent/JPS5991025A/en
Publication of JPS5991025A publication Critical patent/JPS5991025A/en
Pending legal-status Critical Current

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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
    • B29C63/04—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like
    • B29C63/08—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like by winding helically
    • B29C63/10—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like by winding helically around tubular 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0063—Cutting longitudinally
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0013—Extrusion moulding in several steps, i.e. components merging outside the die
    • B29C48/0015—Extrusion moulding in several steps, i.e. components merging outside the die producing hollow articles having components brought in contact outside the extrusion die
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
    • 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
    • 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
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/19—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their edges
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To obtain a cylindrical resin that will be formed readily by an opening apparatus into planar sheet having uniform thickness, by providing extruders with a circular die thereby allowing the cylindrical resin to have uniform temperature distribution throughout the circumference. CONSTITUTION:A double circular die 1 is provided with an annular inner passage 4 in communication with the extruder 2 and an annular outer passage 5 in communication with the extruder 3. The passages 4, 5 meet concentrically at a lip section 6. A covering layer 8 of a resin 7 that is heated and extruded from the extruder 2 via the passage 4 and an adhesive layer 10 of a resin 9 that is heated and extruded from the extruder 3 via the passage 5 are formed into the cylindrical composite layered body 11 with the covering layer 8 inside. The composite layered body 11 is discharged horizontally from the double circular die 1, the top of the composite layered body 11 is cut at the discharging section 12 by a knife 14 to be opened so that it is formed into a belt-shaped sheet 13, and a pipe 15 positioned suitably away from the die 1 is covered with the sheet 13. As the circular die is used, the temperature distribution of the belt-shaped sheet is uniform throughout it and the control of the thickness thereof is easy.

Description

【発明の詳細な説明】 本発明は、管の外周に帯状のシートを巻き付ける、管の
被覆装ＤＷに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tube coating DW in which a band-shaped sheet is wrapped around the outer circumference of the tube.

従来、管の外周に帯状のシートを巻き付ける際には、た
とえば特開昭５０−１４８４８８号公報に示されるよう
に、被覆層と接着層とからなる帯状のシートとしての複
層体をフラットダイから押出し、これを管に巻き伺ける
のが一般的である。ところが、このようにフラットダイ
から押出されるものでは、ダイから押出された複層体の
表面温度が不均一になり易く、また押出量にムラが生じ
て必ずしも均一な肉厚の複層体が得られるとは限らない
。Conventionally, when wrapping a belt-shaped sheet around the outer periphery of a pipe, for example, as shown in Japanese Unexamined Patent Application Publication No. 148488/1988, a multilayered body in the form of a belt-shaped sheet consisting of a coating layer and an adhesive layer is formed from a flat die. Generally, it can be extruded and rolled into a tube. However, when extruding from a flat die like this, the surface temperature of the multilayer body extruded from the die tends to be uneven, and the amount of extrusion also becomes uneven, making it difficult to produce a multilayer body with uniform wall thickness. It doesn't necessarily mean you will get it.

そ仁で本発明は上記従来技術における問題点を解決し、
均一な温度分布と肉ｊヤとを有する帯状のシートを得る
ことを目的とするものである。Therefore, the present invention solves the problems in the above-mentioned prior art,
The object is to obtain a belt-shaped sheet having uniform temperature distribution and thickness.

この目的を達成するため本発明は、押出機から押出され
た樹脂を筒状に形成する丸ダイを設け、この丸ダイから
軸方向に押出される前記筒状の樹脂の周方向の１個所を
切開し、この筒状の樹脂を帯状のシートに形成する切開
装置を設け、この帯状のシートを管に巻き付は可能なよ
うにしたものである。In order to achieve this object, the present invention provides a round die for forming the resin extruded from an extruder into a cylindrical shape. A cutting device is provided to make an incision and form the cylindrical resin into a band-shaped sheet, and this band-shaped sheet can be wrapped around the tube.

したがって、丸ダイを利用したことにより全周方向にわ
たって均一な温度分布が得られるとともに、肉厚の調整
が容易であり１、かつフラットダイに比較して運転操作
が容易であるのみならず、グイから筒状に押出された樹
脂は切開装置により簡単に平坦な帯状のシートに形成で
き、管の被覆が可能となるものである。Therefore, by using a round die, a uniform temperature distribution can be obtained over the entire circumference, the wall thickness can be easily adjusted1, and compared to a flat die, it is not only easy to operate, but also The resin extruded into a cylindrical shape can be easily formed into a flat band-like sheet using a cutting device, and can be used to cover tubes.

以下、本発明の実施例を図面（こもとづいて説明する。Embodiments of the present invention will be described below with reference to the drawings.

第１図において（１）はスクリュ一式の押出機（２）　
（３）が接続された二重丸ダイであり、押出機（２）に
連通ずる環状の内側通路（４）と、押出機（３）に連通
ずる環状の外側通路（５）とを有している。両通路（４
）　（５）はリップ部（６）で同心状に合流しており、
押出機（２）から通路（４）に加熱押出された樹脂（７
）による被覆層（８）と、押出機（３）から通路（５）
に加熱押出された樹脂（９）による接着層（１１とが、
第２図にも示すように、被覆層（８）を内側とする筒状
の複層体αｐに形成されるものである。In Figure 1, (1) is an extruder with a set of screws (2)
(3) is a double round die connected to the die, and has an annular inner passage (4) communicating with the extruder (2) and an annular outer passage (5) communicating with the extruder (3). ing. Both aisles (4
) (5) concentrically merge at the lip (6),
The resin (7) is heated and extruded from the extruder (2) into the passage (4).
) and a passageway (5) from the extruder (3).
The adhesive layer (11) made of the resin (9) heated and extruded into
As shown in FIG. 2, it is formed into a cylindrical multilayer body αp with the coating layer (8) on the inside.

被覆１ｉ’ｌ　（８）を形成する樹脂（７）としては、
ポリエチレン、ポリプロピレン、塩化ビニル、ナイロン
等が利用される。また接着層α（）を形成する樹脂（９
）としては、化学変成ポリエチレン、化学変成ポリプロ
ピレン、塩化ビニル等、接着性を有するものが利用され
る。The resin (7) forming the coating 1i'l (8) is as follows:
Polyethylene, polypropylene, vinyl chloride, nylon, etc. are used. Also, the resin (9) forming the adhesive layer α()
), those having adhesive properties such as chemically modified polyethylene, chemically modified polypropylene, and vinyl chloride are used.

復層体（１０は二重丸ダイ（１）から水平方向に吐出さ
れるものであるが、この吐出部θカには、複層体０◇の
頂部における周方向の１個所を切開して帯状のシート０
１を形成する、切開装置としてのナイフ（ｌ→が設けら
れている。０υはグイ（１）から適当距離をおいて配置
された管である。The multi-layer body (10 is discharged in the horizontal direction from the double round die (1), and this discharge part θ is made by cutting one place in the circumferential direction at the top of the multi-layer body 0◇. band-shaped sheet 0
A knife (l→) is provided as an incision device, forming the guide (1). 0υ is a tube placed at a suitable distance from the guide (1).

被覆方法を説明する。各押出機（２）　（３）から樹脂
（７）（９）を加熱状態で押出し、リップ部（６）で彼
ｌ′Ｉ１．層（８）と接着層θＯとを合流させて、吐出
部０のから筒状の複層体α１）を吐出させる。この筒状
の復層体００はナイフ０るにより切開され、自重および
管ＯＩ′９への巻付時の張力の作用によって拡がり、帯
状のシート０罎となる。この帯状のシート０→は、第１
図に示すように、回転する管ＯＧの頂部からこの管０υ
にらせん状に巻き付けられる。こうすれば、筒状の複層
体０］）の内側が被覆層（８）、かつ外側が接着層（Ｉ
Ｉとされていることにより、帯状のシート０１としての
複層体０◇を管０りに巻き伺ける場合には、接着層０１
が内側となって管０９０表面に粘着するとともに、被覆
層（８）が外側となってこれを覆い、適正な巻き付けが
可能となるものである。The coating method will be explained. The resins (7) and (9) are extruded from each extruder (2) and (3) in a heated state, and the resins (7) and (9) are extruded through the lip portion (6). Layer (8) and adhesive layer θO are merged, and a cylindrical multilayer body α1) is discharged from discharge portion 0. This cylindrical layered body 00 is cut open with a knife and expanded by its own weight and the action of tension when wrapped around the tube OI'9, forming a band-shaped sheet 00. This belt-shaped sheet 0→ is the first
As shown in the figure, from the top of the rotating tube OG to this tube 0υ
Wrapped in a spiral. In this way, the inner side of the cylindrical multilayer body 0]) is the coating layer (8), and the outer side is the adhesive layer (I).
I, if the multilayer body 0◇ as a strip-shaped sheet 01 can be rolled around the pipe, the adhesive layer 01
is on the inside and adheres to the surface of the tube 090, and the coating layer (8) is on the outside and covers this, allowing proper winding.

また、筒状の複層体０◇の頂部を切開して管ＯＱに巻き
付けるため、第８図に示すように帯状のシート０；）と
なった複層体０１）は両端が上方に反つｔコ状態で管Ｏ
Ｑに巻き始められることになる。したがって、復層体（
１すと管０９との隙間に介在するエアーＯＱが都谷良く
排出され、従来のフラットグイを使用した場合のように
上記隙間にエアーが残るという問題が解消される。In addition, since the top of the cylindrical multilayer body 0◇ is cut out and wrapped around the tube OQ, both ends of the multilayer body 01), which has become a band-shaped sheet 0;), are bent upward as shown in Figure 8. Tube O in t state
You will be able to start wrapping around Q. Therefore, the layered body (
The air OQ present in the gap between the first and the pipe 09 is well discharged, and the problem of air remaining in the gap as in the case of using a conventional flat gouer is solved.

第４図は他の実施例を示すものである。すなわち、樹脂
２・シート状に形成した場合には、これを引張って延伸
し、その強度の向上を図ることが一般に行なわれている
。第４図においてθカはこの延伸のためのマンドレルで
あり、筒状の複層体０υを拡径することにより延伸処理
するものである。この場合、ナイフθ・９はマンドレル
（１７）の後流側に配置され、延伸処理後の複層体０υ
を１υ開するように構成されている。FIG. 4 shows another embodiment. That is, when the resin 2 is formed into a sheet shape, it is generally carried out to stretch and stretch the resin 2 in order to improve its strength. In FIG. 4, θ is a mandrel for this stretching, which is used to stretch the cylindrical multilayer body 0υ by expanding its diameter. In this case, the knife θ・9 is placed on the downstream side of the mandrel (17), and the multilayer body 0υ after the stretching process is
It is configured to open 1υ.

なお、」−４実施例では、被覆層（８）と接着層θＯの
二層からなる復層体（ＩＩ）を帯状シート（］；ｐに形
成するものを示したが、ｌことえば被覆層のみからなる
単層のものを利用しでもよいし、三層以上の複層体に適
用することも可能である。このような場合には、グイの
構造を変更すれば、容易に実施できるものである。In addition, in Example 4-4, the multi-layered body (II) consisting of two layers of the covering layer (8) and the adhesive layer θO was formed into a strip-shaped sheet (];p, but in other words, the covering layer It is possible to use a single-layer structure consisting of only one layer, or it can be applied to a multi-layer structure with three or more layers.In such cases, it can be easily implemented by changing the structure of the goo. It is.

以上述べたように本発明によると、丸ダイを利用したこ
とにより全周方向にわたって均一な温度分布が得られる
とともに、肉厚の調整が容易であり、かつフラットダイ
に比較して運転操作が容易であるのみならず、グイから
筒状に押出された樹脂は切開装’ＮＬにより簡単に平坦
な帯状のシートに形成でき、管の被覆が可能となる。As described above, according to the present invention, by using a round die, a uniform temperature distribution can be obtained over the entire circumference, the wall thickness can be easily adjusted, and operation is easier than with a flat die. In addition, the resin extruded into a cylindrical shape from the goo can be easily formed into a flat belt-like sheet using a lancing device 'NL, making it possible to cover the tube.

【図面の簡単な説明】 第１図は本発明の一実施例を示す図、第２図は第１図の
ト」断面の要部を拡大して示す図、第３図は第１図のト
」断面の要部を拡大して示す図、第４図は本発明の他の
実施例を示す図である。 （１）・・・二重丸グイ、（２）　（３）・・・押出機
、（７）　（９）・・・樹脂、０．１・・・シート、α
樽・・・ナイフ（切開装置）　、＜’ｎ・・・管代理人
　森本義弘 東京都中央区築地四丁目１番１ 号東燃石油化学株式会社内 （ヰ出　願　人　横浜化学機械株式会社横浜市港北区綱
島東四丁目６番 １３号 ０出　願　人　東燃石油化学株式会社 東京都中央区築地四丁目１番１[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is an enlarged view of the main part of the T cross section of FIG. 1, and FIG. FIG. 4 is a diagram showing an enlarged view of the main part of the cross section, and FIG. 4 is a diagram showing another embodiment of the present invention. (1)...double round gooey, (2) (3)...extruder, (7) (9)...resin, 0.1...sheet, α
Barrel: Knife (cutting device), <'n: Agent: Yoshihiro Morimoto, Tonen Petrochemical Co., Ltd., 4-1-1 Tsukiji, Chuo-ku, Tokyo (Applicant: Yokohama Kagaku Kikai Co., Ltd., City of Yokohama) 4-6-13 Tsunashima Higashi, Kohoku-ku 0 Applicant: Tonen Petrochemical Co., Ltd. 4-1-1 Tsukiji, Chuo-ku, Tokyo

Claims (1)

【特許請求の範囲】[Claims] １、押出機から押出された樹脂を筒状に形成する丸ダイ
を設け、この丸グイから軸方向に押出される前記筒状の
樹脂の周方向の１個所を切開し、この筒状の樹脂を帯状
のシートに形成する切開装置を設け、この帯状のシート
を管に巻き付は可能なようにしたことを特徴とする管の
被にを装置。1. A round die is provided to form the resin extruded from the extruder into a cylindrical shape, and the cylindrical resin extruded from this round die in the axial direction is incised at one point in the circumferential direction. What is claimed is: 1. A device for covering a tube, characterized in that it is provided with a cutting device for forming the strip into a band-like sheet, and the band-like sheet can be wrapped around the tube.
JP57201397A 1982-11-16 1982-11-16 Device for covering pipe Pending JPS5991025A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57201397A JPS5991025A (en) 1982-11-16 1982-11-16 Device for covering pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57201397A JPS5991025A (en) 1982-11-16 1982-11-16 Device for covering pipe

Publications (1)

Publication Number Publication Date
JPS5991025A true JPS5991025A (en) 1984-05-25

Family

ID=16440407

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57201397A Pending JPS5991025A (en) 1982-11-16 1982-11-16 Device for covering pipe

Country Status (1)

Country Link
JP (1) JPS5991025A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1184157A1 (en) * 2000-08-28 2002-03-06 Basell Polyolefine GmbH Method for producing plastic hollow bodies

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57157720A (en) * 1981-03-05 1982-09-29 Mannesmann Ag Method and device for coating steel pipe with thermoplastic plastic foil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57157720A (en) * 1981-03-05 1982-09-29 Mannesmann Ag Method and device for coating steel pipe with thermoplastic plastic foil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1184157A1 (en) * 2000-08-28 2002-03-06 Basell Polyolefine GmbH Method for producing plastic hollow bodies
US6893603B2 (en) 2000-08-28 2005-05-17 Basell Polyolefine Gmbh Production of hollow plastic articles

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