JPH03109976A - Method for coating inside surface of pipe body with resin - Google Patents
Method for coating inside surface of pipe body with resinInfo
- Publication number
- JPH03109976A JPH03109976A JP25006089A JP25006089A JPH03109976A JP H03109976 A JPH03109976 A JP H03109976A JP 25006089 A JP25006089 A JP 25006089A JP 25006089 A JP25006089 A JP 25006089A JP H03109976 A JPH03109976 A JP H03109976A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- pipe body
- resin
- cylindrical cover
- powder resin
- 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
- 239000011347 resin Substances 0.000 title claims abstract description 49
- 229920005989 resin Polymers 0.000 title claims abstract description 49
- 238000000576 coating method Methods 0.000 title claims abstract description 16
- 239000011248 coating agent Substances 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 6
- 239000000843 powder Substances 0.000 claims abstract description 29
- 238000000151 deposition Methods 0.000 claims 1
- 230000008595 infiltration Effects 0.000 abstract 1
- 238000001764 infiltration Methods 0.000 abstract 1
- 239000003973 paint Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 8
- 238000003618 dip coating Methods 0.000 description 6
- 230000000873 masking effect Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 210000002310 elbow joint Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業」二の利用分野〉
本発明は流動浸漬塗装法によって管体内面に樹脂を被覆
する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industry> Second Field of Application The present invention relates to a method of coating the inner surface of a tube body with a resin by a fluidized dip coating method.
〈従来の技術〉
金属管、例えば、鋼管においては、輸送液体に対する耐
薬品性、耐蝕性を付与するために内面塗装を施すことが
あり、その−塗装法として粉体塗装を使用することがあ
る。すなわち、金属管を加熱し、この加熱金属管内に塗
装ガンを往復移動させると共にガン先端のノズルを回転
させ、ノズルから圧縮空気によって噴射する粉体樹脂を
ノズルの回転、並びに往復移動に従い管内全面に均一に
付着させていくことがある。<Prior art> Metal pipes, such as steel pipes, are sometimes coated on the inside to provide chemical resistance and corrosion resistance to transport liquids, and powder coating is sometimes used as the coating method. . That is, a metal tube is heated, a coating gun is moved back and forth inside the heated metal tube, and a nozzle at the tip of the gun is rotated, and powdered resin is sprayed from the nozzle with compressed air over the entire surface inside the tube as the nozzle rotates and moves back and forth. It may be applied evenly.
〈解決しようとする課題〉
ところで、上記、金属管の接続に用いるベント管、ある
いは直線短管等の短い管に、１．記ノズル方式の粉体塗
装方法を適用することは不適格であり、同じ粉体塗装方
法に属する流動浸漬塗装法を用いることが適切である。<Problems to be Solved> By the way, the above-mentioned short pipes such as bent pipes or straight short pipes used for connecting metal pipes have the following problems: 1. It is inappropriate to apply the nozzle type powder coating method described above, and it is appropriate to use the fluidized dip coating method, which belongs to the same powder coating method.
而るに、ベント管、短管等の内面にのみ流動浸漬塗装法
によって樹脂を被覆するには、ベント管の外面にマスキ
ングを施す必要がある。しかしながら流動浸漬塗装法に
おいては、被塗装体を樹脂溶融温度以上に加熱したうえ
で、その加熱体を粉末樹脂流動槽内に浸漬さぜる必要が
あり、高温に加熱されるなめ、通常のマスキングとは異
なり、接着剤の使用が実際上不可能である。従って、マ
スキングに制約があり、マスキングが至難である。However, in order to coat only the inner surface of a vent pipe, short pipe, etc. with resin by the fluidized dip coating method, it is necessary to mask the outer surface of the vent pipe. However, in the fluidized dip coating method, it is necessary to heat the object to be coated above the resin melting temperature and then immerse the heated body in a powder resin fluidizing bath. In contrast, the use of adhesives is practically impossible. Therefore, there are restrictions on masking, and masking is extremely difficult.
たとえ、マスキングし得たとしても、そのマスキング管
体を加熱する際（通常、加熱炉による）、マスキングと
管体との間の空気層が断熱作用を生起してベント管の加
熱効率を低下させ、また、膨張空気のリークが発生して
、浸漬塗装時に、このリーク箇所から粉末樹脂が浸入し
易い。Even if masking is possible, when the masking tube is heated (usually in a heating furnace), the air layer between the masking and the tube will create an insulating effect, reducing the heating efficiency of the vent tube. Furthermore, leakage of expanded air occurs, and powdered resin tends to infiltrate from this leakage location during dip coating.
本発明の目的は、流動浸漬塗装法により金属短管の内面
に樹脂被覆を、良好な金属管加熱効率並びに簡単なマス
キング乃至はカバーリング作業にて、施し得る管体内面
への樹脂被覆方法を提供することにある。The object of the present invention is to provide a resin coating method for the inner surface of a short metal tube by a fluidized dip coating method, which can be applied with good heating efficiency of the metal tube and simple masking or covering work. It is about providing.
く課題を解決するための手段〉
本発明に係る管体内面の樹脂被覆方法は、内面被塗装管
体の一端にガイド管を取着し、内径並びに長さが被塗装
管体の外径並びに長さよりも大なる筒状カバーの先端を
被塗装管体の他端に取着すると共にガイド管を筒状カバ
ー後端より外部に出し、該筒状カバー付管体を粉体樹脂
流動槽内に、筒状カバー後端部を粉体樹脂流動面よりも
上方に出した状態で保持して、管体内面に粉体樹脂を付
着させることをと特徴とする構成である。Means for Solving the Problem> The method for coating the inner surface of a tube with resin according to the present invention includes attaching a guide tube to one end of the inner surface of the tube to be coated, the inner diameter and length of which are equal to the outer diameter and the outer diameter of the tube to be coated. Attach the tip of the cylindrical cover, which is larger than the length, to the other end of the tube to be painted, and at the same time extend the guide tube to the outside from the rear end of the cylindrical cover, and place the tube with the cylindrical cover inside the powder resin flow tank. The structure is characterized in that the rear end of the cylindrical cover is held in a state that extends above the flow surface of the powder resin, and the powder resin is adhered to the inner surface of the tube.
〈実施例の説明〉 以下、図面により本発明の実施例について説明する。<Explanation of Examples> Embodiments of the present invention will be described below with reference to the drawings.
図面は本発明において使用する流動樹脂被覆装置を示し
ている。The drawing shows a flow resin coating apparatus used in the present invention.
図において、１は内面被塗装金属管体（エルボ−継手）
であり、両端にフランジを有している。２はガイド管で
あり、被塗装管体１の一端に取着しである。３は筒状カ
バーであり、その内径を被塗装管体１の外径よりも大き
くし、その長さを被塗装管体１の長さよりも長くしであ
る。この筒状カバー３は、先端において被塗装管体］の
他端に取着しである。４はガイド管２に取付けなハンガ
ー５はガイド管２に設けた調整弁、６はサイクロン、７
は排気ボン１である。８は流動槽である。In the figure, 1 is a metal pipe body with internal coating (elbow joint)
It has flanges at both ends. Reference numeral 2 denotes a guide tube, which is attached to one end of the tube body 1 to be coated. Reference numeral 3 denotes a cylindrical cover, the inner diameter of which is larger than the outer diameter of the tube 1 to be painted, and the length thereof longer than the length of the tube 1 to be painted. This cylindrical cover 3 is attached at its tip to the other end of the tube to be painted. 4 is a hanger attached to the guide pipe 2, 5 is a regulating valve provided on the guide pipe 2, 6 is a cyclone, 7 is a
is the exhaust bong 1. 8 is a fluidized tank.
本発明によって管体内面に樹脂を被覆するには、まず、
金属管体１を加熱し、この加熱金属管体１の一端にガイ
ド管２の先端を取着し、次いで、管体１の他端に筒状カ
バー３を取着する。In order to coat the inner surface of the tube with resin according to the present invention, first,
The metal tube 1 is heated, the tip of the guide tube 2 is attached to one end of the heated metal tube 1, and then the cylindrical cover 3 is attached to the other end of the tube 1.
このようにして管体１にガイド管２並びに筒状カバー３
を収着し、次いで、その組立体を粉体塗料の流動槽８内
にハンが−４の操作によって浸漬し、筒状カバー３の後
端３０は粉体樹脂流動面Ａよりも上方に出しておく。こ
の浸漬の結果、槽８内の浮遊流動状態の粉体樹脂が管体
１内に浸入し、管体１．内の空気がガイド管２を経て排
気される。In this way, the guide tube 2 and the cylindrical cover 3 are attached to the tube body 1.
Then, the assembly is immersed in the powder coating fluidizing tank 8 by the operation of -4, and the rear end 30 of the cylindrical cover 3 is brought out above the powder resin flowing surface A. I'll keep it. As a result of this immersion, the powdered resin in a floating fluid state in the tank 8 permeates into the tube 1 . The air inside is exhausted through the guide tube 2.
この場合、管体］とガイド管２との接合箇所Ｂを粉体樹
脂流動面Ａよりも下方に位置させであるから、粉体樹脂
は管体１内の上端を越え、管体１の全内面に粉体樹脂を
付着させ得る。一方、筒状カバー３の上端３０を粉体樹
脂流動面Ａより上方に出し、かつ、管体］の上端をガイ
ド管２で筒状カバー３の外部に導いているから、筒状カ
バー３内への粉体樹脂の浸入は起り得す、管体外面への
樹脂付着は全くない。従って、管体１の内面にのみ樹脂
を被覆できる。In this case, since the joining point B between the tube body and the guide tube 2 is located below the powder resin flow surface A, the powder resin will flow over the upper end of the tube body 1 and over the entire tube body 1. Powdered resin may be applied to the inner surface. On the other hand, since the upper end 30 of the cylindrical cover 3 is brought out above the powder resin flow surface A, and the upper end of the cylindrical body is guided to the outside of the cylindrical cover 3 through the guide tube 2, the inside of the cylindrical cover 3 is There is no resin adhesion to the outer surface of the tube. Therefore, only the inner surface of the tube body 1 can be coated with resin.
上記において、排気ボン１７の駆動により、ガイド管２
内を吸引し、管体１内の粉体樹脂を管軸方向に流動させ
ることもできる。この場合、粉体樹脂を、例えば、サイ
クロン６により回収することが望ましい。In the above, the guide pipe 2 is driven by the exhaust bong 17.
It is also possible to make the powder resin inside the tube body 1 flow in the tube axis direction by suctioning the inside. In this case, it is desirable to collect the powdered resin using the cyclone 6, for example.
上記において、金属管１の予熱温度は粉体樹脂の融点に
よって異なるが、例えば、ナイロン樹脂の場合、２５０
℃である。流体槽８への浸漬時間は管体寸法により異な
るが、内径５０ｍｍ、長さ５００ｍｍの金属管の場合、
約５〜１０秒である。管体１内を吸引する場合、その減
圧度は、約−２００ｍｍＨｇである。上記樹脂被覆の終
了した管体１を浸漬槽８がら取出したのちは、管体１内
を軽くエアーブローし、更に、管体１を再加熱すること
が付着樹脂厚みの均一化に有効である。In the above, the preheating temperature of the metal tube 1 varies depending on the melting point of the powder resin, but for example, in the case of nylon resin, the preheating temperature is 250
It is ℃. The immersion time in the fluid tank 8 varies depending on the pipe dimensions, but in the case of a metal pipe with an inner diameter of 50 mm and a length of 500 mm,
Approximately 5 to 10 seconds. When suctioning the inside of the tube body 1, the degree of pressure reduction is approximately -200 mmHg. After the tubular body 1 that has been coated with the resin is taken out from the dipping bath 8, it is effective to lightly blow air into the tubular body 1 and then reheat the tubular body 1 to make the thickness of the adhered resin uniform. .
」１記において、金属管体１の予熱後、該予熱金属管体
を流動槽８に浸漬するまでの時間はできる限り短かくす
ることが、放熱防止上重要であって、金属管体１へのガ
イド管２の取着、金属管体１への筒状カバー３の取着は
ワンタッチで行うことが望まれ、例えば、ガイド管のフ
ランジ、筒状カバー先端の端板に磁石を使用し、これら
と金属管端フランジとを磁力によって結合することがで
きる。1, it is important to keep the time from preheating the metal tube 1 to immersing the preheated metal tube in the fluidized bath 8 as short as possible in order to prevent heat radiation. It is desirable to attach the guide tube 2 and the cylindrical cover 3 to the metal tube body 1 with a single touch. These and the metal tube end flange can be coupled by magnetic force.
また、加熱金属管体の熱がガイド管または筒状カバーを
経て放熱するのを防止するため、ガイド管本体、筒状カ
バー本体に熱絶縁体を用いること、あるいはフランジ間
、フランジ一端板間にシート状熱絶縁体を介在させるこ
とが好ましい。In addition, in order to prevent the heat of the heating metal tube from dissipating through the guide tube or the cylindrical cover, it is necessary to use thermal insulators in the guide tube body and the cylindrical cover body, or between the flanges and between the flange end plates. Preferably, a sheet-like thermal insulator is interposed.
〈発明の効果〉
」二連した通り、本発明に係る管体内面への樹脂被覆方
法によれば、管体を加熱し〜この加熱管体に筒状カバー
並びにガイド管を取着し、次いで、これらの組合体を流
動槽に浸漬するだけで管体内面に樹脂を被覆することが
可能であり、管体の加熱を管体単独で行っているから、
管体の加熱を効率よく行い得、また、加熱管体への筒状
カバーの取着並びに同加熱管体へのガイド管の取着作業
は、加熱管体の全外面を耐熱シート等によってマスキン
グする作業よりもごく短時間で容易に行い得るから、作
業性も優れている。<Effects of the Invention> As mentioned above, according to the method for coating the inner surface of a tube with resin according to the present invention, the tube is heated, a cylindrical cover and a guide tube are attached to the heated tube, and then a , it is possible to coat the inner surface of the tube with resin simply by immersing these combinations in a fluidized tank, and heating of the tube is performed by the tube alone.
The tube can be heated efficiently, and the entire outer surface of the heating tube can be masked with a heat-resistant sheet, etc. when attaching the cylindrical cover to the heating tube and attaching the guide tube to the heating tube. The workability is also excellent because it can be done easily and in a much shorter time than the previous work.
図面は本発明において使用する樹脂被覆装置を示す説明
図である。
１・・・・・・管体 ２・・・・・・ガイド管
３・・・・・・筒状カバー ８・・・・・・粉体樹脂
流動面八−・−・・・粉体樹脂流動面The drawing is an explanatory diagram showing a resin coating device used in the present invention. 1... Pipe body 2... Guide tube 3... Cylindrical cover 8... Powder resin flow surface 8-... Powder resin fluid surface
Claims (1)
長さが被塗装管体の外径並びに長さよりも大なる筒状カ
バーの先端を被塗装管体の他端に取着すると共にガイド
管を筒状カバー後端より外部に引出し、該筒状カバー付
管体を粉体樹脂流動槽内に、筒状カバー後端部を粉体樹
脂流動面よりも上方に出した状態で保持して、管体内面
に粉体樹脂を付着させることを特徴とする管体内面への
樹脂被覆方法。A guide tube is attached to one end of the inner surface of the tube to be painted, and the tip of a cylindrical cover whose inner diameter and length are larger than the outer diameter and length of the tube to be painted is attached to the other end of the tube to be painted. At the same time, the guide tube is pulled out from the rear end of the cylindrical cover, and the tubular body with the cylindrical cover is placed in the powder resin flow tank, with the rear end of the cylindrical cover extended above the powder resin flow surface. A method for coating an inner surface of a tube with resin, the method comprising holding the inner surface of the tube and depositing powdered resin on the inner surface of the tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1250060A JPH0751231B2 (en) | 1989-09-26 | 1989-09-26 | Resin coating method on inner surface of tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1250060A JPH0751231B2 (en) | 1989-09-26 | 1989-09-26 | Resin coating method on inner surface of tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03109976A true JPH03109976A (en) | 1991-05-09 |
| JPH0751231B2 JPH0751231B2 (en) | 1995-06-05 |
Family
ID=17202204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1250060A Expired - Lifetime JPH0751231B2 (en) | 1989-09-26 | 1989-09-26 | Resin coating method on inner surface of tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0751231B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006212474A (en) * | 2005-02-01 | 2006-08-17 | Nittetsu Corrosion Prevention Co Ltd | Production method for polyethylene resin coating metal pipe and polyethylene resin coating metal pipe |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54141861A (en) * | 1978-04-24 | 1979-11-05 | Kowa Kogyosho:Kk | Simultaneous covering of inner and outside surfaces of large-diameter metal tube |
| JPS621549A (en) * | 1985-06-28 | 1987-01-07 | Toshiba Corp | Dot printer |
-
1989
- 1989-09-26 JP JP1250060A patent/JPH0751231B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54141861A (en) * | 1978-04-24 | 1979-11-05 | Kowa Kogyosho:Kk | Simultaneous covering of inner and outside surfaces of large-diameter metal tube |
| JPS621549A (en) * | 1985-06-28 | 1987-01-07 | Toshiba Corp | Dot printer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006212474A (en) * | 2005-02-01 | 2006-08-17 | Nittetsu Corrosion Prevention Co Ltd | Production method for polyethylene resin coating metal pipe and polyethylene resin coating metal pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0751231B2 (en) | 1995-06-05 |
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