JPS62167023A - Manufacture of heat insulating pipe - Google Patents
Manufacture of heat insulating pipeInfo
- Publication number
- JPS62167023A JPS62167023A JP61008740A JP874086A JPS62167023A JP S62167023 A JPS62167023 A JP S62167023A JP 61008740 A JP61008740 A JP 61008740A JP 874086 A JP874086 A JP 874086A JP S62167023 A JPS62167023 A JP S62167023A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- pipe
- peripheral surface
- metal pipe
- outer peripheral
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 26
- 230000002093 peripheral effect Effects 0.000 claims abstract description 24
- 239000004698 Polyethylene Substances 0.000 claims abstract description 17
- -1 polyethylene Polymers 0.000 claims abstract description 17
- 229920000573 polyethylene Polymers 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000005187 foaming Methods 0.000 claims abstract description 7
- 229920013716 polyethylene resin Polymers 0.000 abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052802 copper Inorganic materials 0.000 abstract description 11
- 239000010949 copper Substances 0.000 abstract description 11
- 210000002445 nipple Anatomy 0.000 abstract description 4
- 239000011347 resin Substances 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000011247 coating layer Substances 0.000 description 26
- 239000010410 layer Substances 0.000 description 26
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000000576 coating method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004513 sizing Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 235000013372 meat Nutrition 0.000 description 2
- 241000283153 Cetacea Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000002747 voluntary effect Effects 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
- 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)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、金属管の周囲に発泡ポリエチレン製の被覆層
を設けた断熱パイプの製造方法に関するしのである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a heat insulating pipe in which a covering layer made of foamed polyethylene is provided around a metal pipe.
（従来技術及びその問題点）
この種の断熱パイプの製造に際しては、上流側から金属
管を走行させ、押出機で被覆層を金属管の外周面に被覆
しながら、下流側からキャタピラ機構で断熱パイプを引
張るようになっている。(Prior art and its problems) When manufacturing this type of insulated pipe, the metal pipe is run from the upstream side, and while the outer peripheral surface of the metal pipe is coated with a coating layer using an extruder, the insulation is insulated from the downstream side using a caterpillar mechanism. It is designed to pull the pipe.
しかしながら、キャタピラ機構は被覆層の外周面を掴／
υで断熱パイプを引張るので、被覆層と金属管の付着力
が弱いと、被覆層だけが金属管・かう剥がれてしまうと
いう問題がある。特に断熱パイプの軽量化のために、被
覆層を形成する発泡ポリエチレンの発泡度を上げた場合
には、前述の問題が顕著に発生する。However, the caterpillar mechanism grips the outer peripheral surface of the coating layer/
Since the insulated pipe is pulled by υ, if the adhesion between the coating layer and the metal pipe is weak, there is a problem that only the coating layer will peel off from the metal pipe. In particular, when the foaming degree of the foamed polyethylene forming the coating layer is increased in order to reduce the weight of the heat insulating pipe, the above-mentioned problem occurs significantly.
被覆層の発泡ポリエチレンは益々発泡度が高くなる傾向
にあり、敲覆層と金属管の付着力を向上させることが要
望されている。The degree of foaming of the foamed polyethylene coating layer tends to become higher and higher, and it is desired to improve the adhesion between the coating layer and the metal tube.
〈発明の目的〉
本発明は、被覆層と金属管の付着力を向上させて被覆層
だけが金属管から剥がれてしまうことを防止し１ｇる断
熱パイプの製造方法を提供Ｊることを目的としている。<Purpose of the Invention> The purpose of the present invention is to provide a method for manufacturing a 1g insulated pipe that improves the adhesion between the coating layer and the metal tube to prevent the coating layer from peeling off from the metal tube. There is.
（発明の構成）
（１）技術的手段
本発明は、金属管の周囲に発泡ポリエチレン製の被ｍｍ
を設【プた断熱パイプの製造方法であって、金＆管を予
め所定の温度まで予熱した後に、押出機で高発泡度の発
泡ポリエチレンを金属管の外周面に直接被覆することを
特徴とする断熱パイプの製造方法である。(Structure of the Invention) (1) Technical Means The present invention provides a metal tube with a foamed polyethylene sheath around the metal tube.
This is a method for manufacturing an insulated pipe, which is characterized by preheating the metal tube to a predetermined temperature and then directly coating the outer circumferential surface of the metal tube with highly foamed polyethylene using an extruder. This is a method for manufacturing an insulated pipe.
（２）作用
高発泡度の発泡ポリエチレンが金属管に強固に付着する
所定の温度にまで金属管を予熱ず゛るので、金属管の外
周面に直接被覆しても、発泡ポリエチレンの付着力が強
くなる。(2) Effect The metal tube is preheated to a predetermined temperature at which the highly foamed polyethylene adheres firmly to the metal tube, so even if the outer circumferential surface of the metal tube is coated directly, the adhesive strength of the expanded polyethylene will be reduced. Become stronger.
（実施例）
本発明を採用して製造した断熱パイプを示す第１図にお
いて、１０は例えば給水給湯用の水を通す鋼管（金属管
）である。鋼管１０の外周面１０ａには詳しくは後）ボ
する被覆層１２が直接に被覆されている。被覆層１２は
水密性を有する独立発泡ポリエチレン製であり、′Ｐ＆
覆層１２の発泡度は約８０％の高発泡度に設定されてい
る。(Example) In FIG. 1 showing an insulated pipe manufactured by adopting the present invention, 10 is a steel pipe (metal pipe) through which water for water supply and hot water supply, for example, passes. The outer peripheral surface 10a of the steel pipe 10 is directly coated with a coating layer 12, which will be described in detail later. The covering layer 12 is made of watertight closed-cell polyethylene, and
The foaming degree of the covering layer 12 is set to a high foaming degree of about 80%.
１’ｌｌ！！覆層１２は銅管１０の外周面１０ａへの付
着力が弱く、通常の被覆工程では被覆層１２が外周面１
０ａから剥がれてしまうので、第２図に示すような製造
設備で製造される。1'll! ! The coating layer 12 has weak adhesion to the outer circumferential surface 10a of the copper tube 10, and in a normal coating process, the coating layer 12 does not adhere to the outer circumferential surface 10a of the copper tube 10.
Since it peels off from 0a, it is manufactured using manufacturing equipment as shown in FIG.
第２図において、２０は送出しリールであり、送出しリ
ール２０から銅管１０が矢印Ａ方向に巻き取りリール２
２へ向かって所定の速度で走行している。送出しリール
２０と巻き取りリール２２の間には、ミータリング機構
２４、予熱機構２６、押出機２８、サイジングダイ３０
、水槽３２、カウンタ３４、引取機３６が順次に配置さ
れている。In FIG. 2, reference numeral 20 denotes a delivery reel, and the copper tube 10 is moved from the delivery reel 20 to the take-up reel 2 in the direction of arrow A.
The car is traveling at a predetermined speed toward the road 2. Between the delivery reel 20 and the take-up reel 22, there are a metering mechanism 24, a preheating mechanism 26, an extruder 28, and a sizing die 30.
, a water tank 32, a counter 34, and a take-up machine 36 are arranged in this order.
ミータリング機構２４は送出しリール２０に巻き取られ
ている鋼管１０を具直ぐに引伸ばすための機構である。The metering mechanism 24 is a mechanism for immediately stretching the steel pipe 10 wound on the delivery reel 20.
予熱機構２６は鋼管１０の外周面１０ａ（第１図）に被
覆層１２を直接に被覆し得るような詳しくは後述する所
定の温度まで鋼管１０を予熱するものである。The preheating mechanism 26 preheats the steel pipe 10 to a predetermined temperature, which will be described in detail later, so that the outer peripheral surface 10a (FIG. 1) of the steel pipe 10 can be directly coated with the coating layer 12.
押出機２８は高発泡度ポリエヂレン樹脂を外周面１０ａ
に被覆するものであり、押出機２８は第１段スクリュー
２８ａと第２段スクリュー２８ｔ）を有する所謂２段ス
クリュータイプである。第１段スクリュー２８ａより第
２段スクリュー２８ｂが大径であり、前記樹脂を一定の
安定した状態で被覆するようになっている。The extruder 28 extrudes the highly foamed polyethylene resin onto the outer peripheral surface 10a.
The extruder 28 is a so-called two-stage screw type having a first stage screw 28a and a second stage screw 28t. The second stage screw 28b has a larger diameter than the first stage screw 28a, and is designed to coat the resin in a constant and stable state.
サイジングダイ３０は外周面１０ａ（１１図）に被覆さ
れた後の被覆層１２（第１図）の直径を高精度に維持す
るための機構である。水槽３２は被覆層１２を冷却する
ために設けられている。外径測定器３４は冷却後の被覆
層１２の直径を測定する測定器である。引取機３６は被
覆層１２の外周面を２個の引取ベルト３６ａの間に掴ん
で、断熱パイプ全体を矢印へ方向に引張る駆動源である
。The sizing die 30 is a mechanism for maintaining the diameter of the coating layer 12 (FIG. 1) after being coated on the outer peripheral surface 10a (FIG. 11) with high precision. The water tank 32 is provided to cool the coating layer 12. The outer diameter measuring device 34 is a measuring device that measures the diameter of the coating layer 12 after cooling. The pulling machine 36 is a driving source that grips the outer circumferential surface of the coating layer 12 between two pulling belts 36a and pulls the entire insulated pipe in the direction of the arrow.
押出！５１２８での被引１２の被覆工程を示す第３図に
おいて、鋼管１０は予熱ｉ横２６（第２図）で５０〜６
０゛Ｃの温度に予熱されている。鋼管１０の半径方向外
方には周知のニップル４０、ダイス４２が配置されてお
り、ニップル４０とダイス４２の間の環状通路に第１段
スクリュー２８ａ１第２段スクリュー２８ｂ（第２図〉
から発泡ポリエチレン樹脂４４が供給されている。発泡
ポリエチレン樹脂４４の発泡度は８０％に設定されてい
る。Extrude! In Fig. 3 showing the coating process of the drawn material 12 at 5128, the steel pipe 10 is preheated to 50 to 6
It is preheated to a temperature of 0°C. A well-known nipple 40 and a die 42 are arranged radially outward of the steel pipe 10, and a first stage screw 28a1 and a second stage screw 28b (Fig. 2) are installed in an annular passage between the nipple 40 and the die 42.
Foamed polyethylene resin 44 is supplied from. The foaming degree of the foamed polyethylene resin 44 is set to 80%.
外周面１０ａの外周面に約１４０°Ｃで押出された発泡
ポリエヂレン樹脂４４は、第４図に示すように、外周面
１０ａに接触して発泡ポリエチレン樹脂４４の内周面４
６が一旦冷却され、内周層４８が形成される。内周層４
８は中央部の気泡層５０と比較すると速く固化するので
、内周層４８内には気泡５２が混入しない。As shown in FIG. 4, the foamed polyethylene resin 44 extruded onto the outer peripheral surface 10a at about 140° C. contacts the outer peripheral surface 10a and forms the inner peripheral surface 4 of the foamed polyethylene resin 44.
6 is once cooled, and an inner peripheral layer 48 is formed. Inner layer 4
8 solidifies more quickly than the bubble layer 50 in the center, so that no bubbles 52 are mixed into the inner circumferential layer 48.
発泡ポリエチレン樹脂４４の外周層５４は冷月１された
サイジングダイ３０を通すことにより平滑な外周面５６
が形成される。内周層４８と外周層５４の間の気泡層５
０には気泡５２が略均−に分布し、気泡に４５０は大き
な断熱効果を有している。The outer circumferential layer 54 of the foamed polyethylene resin 44 is passed through a cold sizing die 30 to obtain a smooth outer circumferential surface 56.
is formed. Cell layer 5 between inner circumferential layer 48 and outer circumferential layer 54
0, the air bubbles 52 are approximately evenly distributed, and the air bubbles 450 have a large heat insulating effect.
以上の各工程を工程順に説明すると、次のようになる。The above steps will be explained in order as follows.
工程１：ミータリングｉ構２４で鋼管１０を真直ぐに引
伸ばす。Step 1: Straighten the steel pipe 10 using the metering structure 24.
工程２：予熱Ｒ横２６で鋼管１０を５０〜６０°Ｃまで
予熱する。Step 2: Preheat the steel pipe 10 with the R side 26 to 50 to 60°C.
工程３：押出機２８で銅管１０の外周面１０ａに発泡ポ
リエチレン樹脂４４を被覆する。Step 3: The outer peripheral surface 10a of the copper tube 10 is coated with the foamed polyethylene resin 44 using the extruder 28.
■程４：サイジングダイ３０で発泡ポリエチレン樹脂４
４の外径の精度を上げる。■Step 4: Foamed polyethylene resin 4 with sizing die 30
Increase the accuracy of the outer diameter of 4.
工程５：水槽３２で発泡ポリエチレン樹脂４４を冷！Ｊ
Ｉ Ｌ、被覆層１２を形成する。Step 5: Cool the foamed polyethylene resin 44 in the water tank 32! J
IL, a covering layer 12 is formed.
工程５：外径測定器３４で被覆層１２の外径を測定する
。Step 5: Measure the outer diameter of the coating layer 12 using the outer diameter measuring device 34.
■程６：カウンタ３５で長さを測定する。■Step 6: Measure the length with the counter 35.
工程７：引取機３６で断熱バイブを巻ぎ取りリール２２
へ送る。Step 7: Wind the insulating vibrator onto the reel 22 with the take-up machine 36
send to
次に作用を説明する。第４図で内周層４８の内周面４６
には内周層４８が形成され、該内周層４８は外周面１０
ａを強く把持し、引取機３６（第２図）で被覆層１２の
外周面を掴んで矢印へ方向に引張っても、被覆層１２が
外周面１０ａから剥がれてしまうことはない。Next, the effect will be explained. In FIG. 4, the inner circumferential surface 46 of the inner circumferential layer 48
An inner peripheral layer 48 is formed on the outer peripheral surface 10.
Even if the outer circumferential surface of the coating layer 12 is gripped firmly by the puller 36 (FIG. 2) and pulled in the direction of the arrow, the coating layer 12 will not peel off from the outer circumferential surface 10a.
したがって第５図に示す従来のように、鋼管１０の外周
面１０ａにポリエチレン層６０（非発泡）を被覆した後
に、ポリエチレン層６０の外周面に被′ｒ！１層１２を
被覆づ゛る必要がなくなる。このため第２図の予熱機構
２６と押出機２８の間に第１段押出機６２（第２図仮想
線図）を設【プることも不要になる。Therefore, as in the conventional method shown in FIG. 5, after the outer circumferential surface 10a of the steel pipe 10 is coated with the polyethylene layer 60 (non-foamed), the outer circumferential surface of the polyethylene layer 60 is coated with the polyethylene layer 60 (non-foamed). There is no need to cover one layer 12 over and over again. Therefore, it becomes unnecessary to install the first stage extruder 62 (phantom diagram in FIG. 2) between the preheating mechanism 26 and the extruder 28 in FIG.
また第４図の外周層５４の外周面５６は平滑であるので
、被覆層１２の外周面から水がｍ Ｔｆｆ ）ｊ１２の
内部に染込むこともなくなる。Furthermore, since the outer circumferential surface 56 of the outer circumferential layer 54 shown in FIG. 4 is smooth, water will not seep into m Tff )j12 from the outer circumferential surface of the coating layer 12.
第３図、第４図において、各データを次のように設定し
た場合には、銅管１０の予熱温度は５４゛Ｃが最適であ
る。この場合内周層４８の厚ざδ１が０．１５鷹、外周
層５４の厚さδ２が２．０Ｍになる。In FIGS. 3 and 4, when each data is set as follows, the optimum preheating temperature for the copper tube 10 is 54°C. In this case, the thickness difference δ1 of the inner circumferential layer 48 is 0.15 mm, and the thickness δ2 of the outer circumferential layer 54 is 2.0M.
鋼管１０の直径Ｄ１＝９．５２＃
銅管１０の肉Ｊ９丁１＝０．５／ｌｌ１１鋼管１０の送
り速度Ｓ−１０ＴｒＬ／ｍ ｉ ｎ。Diameter D1 of steel pipe 10 = 9.52# Meat J9 of copper pipe 10 = 0.5/ll11 Feed speed of steel pipe 10 S-10TrL/min.
被引「２の肉厚下２＝２．０ｍｍ
発泡ポリエチレン樹脂４４の供給（至）Ｗ＝３０００Ｃ
／ｍｉｎ。Thickness under 2 = 2.0 mm Supply of foamed polyethylene resin 44 (to) W = 3000C
/min.
（発明の効果）
以上説明したように本発明による断熱バイブの製造方法
では、ミータリング機構２４で銅管１゜を所定の温度に
まで予熱した後に、押出機２８で発泡ポリエチレン樹脂
４４を直接外周面１０ａに被覆し、第４図の内周層４８
で被覆層１２を外周面１０ａに強固に付着させるように
したので、引取は３６で被覆層１２の外周面を掴んぐ断
熱バイブを矢印Ａ方向に引張っても、被覆層１２が外周
面１０ａから剥がれてしまうことがなくなり、第５図の
ポリエチレン層６０を省くことができる。(Effects of the Invention) As explained above, in the method for manufacturing a heat insulating vibrator according to the present invention, after the copper tube 1° is preheated to a predetermined temperature by the metering mechanism 24, the foamed polyethylene resin 44 is directly applied to the outer peripheral surface by the extruder 28. 10a, and the inner peripheral layer 48 of FIG.
Since the coating layer 12 is firmly attached to the outer circumferential surface 10a, even if the insulating vibrator that grips the outer circumferential surface of the coating layer 12 is pulled in the direction of arrow A, the coating layer 12 will not come away from the outer circumferential surface 10a. There is no possibility of peeling off, and the polyethylene layer 60 shown in FIG. 5 can be omitted.
したがって第２図の予熱機構２６と押出機２８の間に第
１段押出機６２を設ける必要もなくなり、断熱バイブの
製造設備を簡略化できる。Therefore, there is no need to provide the first stage extruder 62 between the preheating mechanism 26 and the extruder 28 in FIG. 2, and the manufacturing equipment for the heat insulating vibrator can be simplified.
（別の実施例）
（１） 本発明は以上の実施例に限定されず、次の各珀
目の範囲に適用できる。(Another embodiment) (1) The present invention is not limited to the above embodiments, but can be applied to the following ranges of squares.
発泡ポリエチレンの材質：低密度ポリエチレン、高密度
ポリエチレン、ブレンドタイプ
発泡剤（フレオン）：有、無
成核剤： ０．５〜１０．０％
金属管の材質：銅、アルミ
金属管の外径；７．０へ・５５鯨
金属管の肉１９丁１ ： Ｏ，！５〜３．０ｒｒｖｎ被
覆層１２の発准度：５０〜８５％
被覆層１２の実効透電率：１．１９５〜１．６被ＳＲＦ
ｉ １２の外径：１２〜８０Ｉｎ！ｎFoamed polyethylene material: low-density polyethylene, high-density polyethylene, blend type Foaming agent (Freon): Yes, no nucleating agent: 0.5-10.0% Metal tube material: Copper, aluminum Outer diameter of metal tube; To 7.0・55 Whale metal pipe meat 19 pieces 1: O,! 5 to 3.0 rrvn Degree of conductivity of coating layer 12: 50 to 85% Effective conductivity of coating layer 12: 1.195 to 1.6 SRF
i12 outer diameter: 12~80In! n
第１図は本発明を採用した断熱バイブの横断面図、第２
図は断熱バイブの製造設備を示す構造略図、第３図は発
泡ポリエチレン樹脂の被覆工程を示づ゛縦断面図、第４
図は第３図のＩｖ部拡大図、第５図は従来の断熱バイブ
を示す横断面図である。
１０・・・銅管、１２・・・？ｌｌ！ｉ苛層、２６・・
・予熱機構、２８・・・押出機、３６・・・引取機、４
４・・・発泡ポリエチレン樹脂、４８・・・内周層、４
８ａ・・・内周層、５４・・・外周層
特許出願人 大日日木電１株式会社
代叩人 弁理士 大森忠孝
第４図
手続補正書（自発）
昭和６１年２月２Ｓ日Fig. 1 is a cross-sectional view of a heat insulating vibrator adopting the present invention, Fig. 2
The figure is a structural diagram showing the manufacturing equipment for heat insulating vibrators, Figure 3 is a longitudinal sectional view showing the process of coating with foamed polyethylene resin, and Figure 4 is a longitudinal sectional view showing the process of coating with foamed polyethylene resin.
The figure is an enlarged view of section IV in FIG. 3, and FIG. 5 is a cross-sectional view showing a conventional heat insulating vibrator. 10...Copper pipe, 12...? ll! i, 26...
・Preheating mechanism, 28... Extruder, 36... Taking machine, 4
4... Foamed polyethylene resin, 48... Inner peripheral layer, 4
8a...Inner circumferential layer, 54...Outer circumferential layer Patent applicant: Dainichi Mokuden 1 Co., Ltd. representative Patent attorney: Tadataka Omori Diagram 4 procedural amendment (voluntary) February 2S, 1986
Claims (2)
けた断熱パイプの製造方法であって、金属管を５０℃〜
６０℃まで予熱した後に、押出機で高発泡度の発泡ポリ
エチレンを金属管の外周面に直接被覆することを特徴と
する断熱パイプの製造方法。(1) A method for manufacturing a heat-insulating pipe in which a covering layer made of foamed polyethylene is provided around a metal pipe, the metal pipe being heated at 50°C to
A method for producing a heat insulating pipe, which comprises preheating the pipe to 60°C and then directly covering the outer peripheral surface of the metal pipe with highly foamed polyethylene using an extruder.
請求の範囲第１項記載の断熱パイプの製造方法。(2) The method for manufacturing an insulated pipe according to claim 1, wherein the foamed polyethylene has a foaming degree of about 80%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61008740A JPH0698664B2 (en) | 1986-01-17 | 1986-01-17 | Insulation pipe manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61008740A JPH0698664B2 (en) | 1986-01-17 | 1986-01-17 | Insulation pipe manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62167023A true JPS62167023A (en) | 1987-07-23 |
| JPH0698664B2 JPH0698664B2 (en) | 1994-12-07 |
Family
ID=11701341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61008740A Expired - Lifetime JPH0698664B2 (en) | 1986-01-17 | 1986-01-17 | Insulation pipe manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0698664B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003534162A (en) * | 2000-05-23 | 2003-11-18 | ベロル・コーポレイション | Writing implement and manufacturing method thereof |
| WO2006121130A1 (en) * | 2005-05-12 | 2006-11-16 | The Furukawa Electric Co., Ltd. | Composite pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4881076A (en) * | 1972-01-31 | 1973-10-30 | ||
| JPS51128367A (en) * | 1975-04-30 | 1976-11-09 | Kubota Ltd | Method of coating foaming resin |
| JPS55100144A (en) * | 1979-01-24 | 1980-07-30 | Nippon Steel Corp | Manufacture of plastic cladding steel pipe |
| JPS6072219U (en) * | 1983-10-25 | 1985-05-21 | 積水化学工業株式会社 | Equipment for covering core material with thermoplastic resin foam |
| JPS60112418A (en) * | 1983-11-24 | 1985-06-18 | Mitsubishi Petrochem Co Ltd | Manufacture of adiabatically coated pipe |
-
1986
- 1986-01-17 JP JP61008740A patent/JPH0698664B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4881076A (en) * | 1972-01-31 | 1973-10-30 | ||
| JPS51128367A (en) * | 1975-04-30 | 1976-11-09 | Kubota Ltd | Method of coating foaming resin |
| JPS55100144A (en) * | 1979-01-24 | 1980-07-30 | Nippon Steel Corp | Manufacture of plastic cladding steel pipe |
| JPS6072219U (en) * | 1983-10-25 | 1985-05-21 | 積水化学工業株式会社 | Equipment for covering core material with thermoplastic resin foam |
| JPS60112418A (en) * | 1983-11-24 | 1985-06-18 | Mitsubishi Petrochem Co Ltd | Manufacture of adiabatically coated pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003534162A (en) * | 2000-05-23 | 2003-11-18 | ベロル・コーポレイション | Writing implement and manufacturing method thereof |
| WO2006121130A1 (en) * | 2005-05-12 | 2006-11-16 | The Furukawa Electric Co., Ltd. | Composite pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0698664B2 (en) | 1994-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS62167023A (en) | Manufacture of heat insulating pipe | |
| WO1993010922A1 (en) | Extrusion apparatus for sheathing a temperature sensitive core material | |
| GB2195576A (en) | Cooling process and apparatus | |
| US4533421A (en) | Method for making a lap seam extruded tendon | |
| WO2006121130A1 (en) | Composite pipe | |
| JP7484330B2 (en) | Manufacturing method of coated pipe | |
| CA1315933C (en) | Manufacture of plastic jacketed steel pipe | |
| JPH09267405A (en) | Production of surface embossed foam tube | |
| JPH01291921A (en) | Manufacture of fluororesin coated metallic foil | |
| JPS61108540A (en) | Manufacturing method of heat insulation pipe | |
| JPH02217124A (en) | Manufacture of composite wire | |
| JP2893476B2 (en) | Rubber hose manufacturing method | |
| JPS56142029A (en) | Production of lined metallic pipe | |
| JPS6086706A (en) | Method of producing high foamable polyethylene insulated wire | |
| JPH079539A (en) | Manufacture of synthetic resin pipe | |
| JP2000052424A (en) | Production of synthetic resin lining pipe | |
| JPS59146828A (en) | Method and apparatus for producing plastic-covered steel pipe | |
| JPH0939064A (en) | Manufacture of heat-insulating material covering pipe with protective sheet | |
| CN117227132A (en) | Production equipment and production method for coating polyethylene sheath on polyurethane heat-insulating pipe | |
| JPS623923A (en) | Manufacture of heat insulating pipe | |
| JP2003071915A (en) | Method for molding heat insulating cover, and mold | |
| JPH0750111A (en) | Manufacture of coaxial cable | |
| JPH11348145A (en) | Production of synthetic resin pipe | |
| JPH09300424A (en) | Apparatus for extrusion molding of outer layer of two-layer resin pipe | |
| JPS623922A (en) | Manufacture of heat insulating pipe |