JPH0221969A - Method for coating pc steel material to prevent rust - Google Patents
Method for coating pc steel material to prevent rustInfo
- Publication number
- JPH0221969A JPH0221969A JP17285388A JP17285388A JPH0221969A JP H0221969 A JPH0221969 A JP H0221969A JP 17285388 A JP17285388 A JP 17285388A JP 17285388 A JP17285388 A JP 17285388A JP H0221969 A JPH0221969 A JP H0221969A
- Authority
- JP
- Japan
- Prior art keywords
- steel material
- powder
- coating
- steel
- synthetic 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 61
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 44
- 239000010959 steel Substances 0.000 title claims abstract description 44
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 238000000576 coating method Methods 0.000 title claims description 16
- 239000011248 coating agent Substances 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 11
- 239000000843 powder Substances 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 12
- 239000000057 synthetic resin Substances 0.000 claims abstract description 12
- 239000011247 coating layer Substances 0.000 claims abstract description 11
- 230000001070 adhesive effect Effects 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims abstract description 5
- 230000008018 melting Effects 0.000 claims abstract description 5
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 5
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 4
- 239000011347 resin Substances 0.000 abstract description 4
- 230000003449 preventive effect Effects 0.000 abstract 1
- 230000008021 deposition Effects 0.000 description 13
- 238000001816 cooling Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000013556 antirust agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、プレス１〜レストコンクリート（以下ＰＣと
記す）の緊張材として使用するｐｃｓ材の防錆被覆方法
に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for anticorrosion coating of PCS materials used as tendons for press 1 to rest concrete (hereinafter referred to as PC).
（従来の技術）
従来、ＰＣ鋼材としては、棒状をしたＰＣ鋼棒細線状を
したＰＣ鋼線、細線を撚り合わせたＰＣストランド等が
使用されており、これらのＰＣ鋼材は鋼製シース内に挿
通して使用されている。(Prior art) Conventionally, as PC steel materials, bar-shaped PC steel rods, thin wire-shaped PC steel wires, PC strands made of thin wires, etc. have been used, and these PC steel materials are placed inside a steel sheath. It is inserted and used.
近年、この種のｐ ＣＩｌｌ材を使用したＰＣ構造物に
おいて、その性能の低下の原因としてＰＣ鋼材の腐蝕か
問題視され、鋼製シースを使用する場合にもそのシース
内にグリース等の防錆剤をクララ１−とじて使用したり
、合成樹脂シースを使用したものには予めシース内にグ
リースを充填した所謂アンボントス１〜ランドが使用さ
れるに至った。In recent years, in PC structures using this type of p CIll material, corrosion of the PC steel material has been viewed as a problem as the cause of the decline in performance, and even when a steel sheath is used, it is necessary to apply anti-rust agents such as grease inside the sheath. In cases where the agent is closed or a synthetic resin sheath is used, the so-called Ambontos 1-Land, in which the sheath is filled with grease in advance, has come to be used.
（発明が解決しようとする課題）
しかし、このような従来の防錆方法ては、当初からシー
スに傷があったり、後に損傷したりして防水か完全でな
い場合には、ＰＣ鋼材の完全な防錆を数十部にも亘って
維持することができるか否かが問題であった。このため
、ｐｃｓ材自体に直接防錆塗装を施す等の防錆方法も考
えられるが、塗装の場合、ピンホールが生じ易く、これ
を防止するために厚い被覆層を形成すると、材料費か多
く要するとともに均一な厚さの被覆を形成するためには
多工程を要し、ニス１〜高となる等の問題があった。(Problem to be solved by the invention) However, with such conventional rust prevention methods, if the sheath is scratched from the beginning or damaged later and is not completely waterproof, The problem was whether rust prevention could be maintained over several tens of parts. For this reason, anti-rust methods such as applying anti-rust coating directly to the PCS material itself can be considered, but painting tends to cause pinholes, and forming a thick coating layer to prevent this will increase the material cost and increase the cost. In addition, in order to form a coating with a uniform thickness, multiple steps were required, and there were problems such as the varnish being 1 to 100% thick.
本発明は、このような従来の問題に鑑み、薄くてピンホ
ールがなく、しかも強力な接着が得られ完全な耐蝕性被
覆か低コス１−にて簡１ｐに得られる「）Ｃ鋼材の防錆
被覆方法の提供を目的としだものである。In view of these conventional problems, the present invention has developed a method for providing protection for C steel materials that is thin, has no pinholes, has strong adhesion, and can be easily obtained with a complete corrosion-resistant coating at a low cost. The purpose is to provide a rust coating method.
（問題点を解決するための手段）
上述の如き従来の問題を解決し、所期の目的を達成する
本発明のＰＣｌ４材の防錆被覆方法は、接着性を有する
熱可塑性合成樹脂粉体材料を被着槽内に流動させ、該被
着槽内にｐ （つ鋼材を挿通させて、該ＰＣ鋼材の外面
に前記粉体、材料を（＝１着させ、そのイ・１着した粉
体材イ゛１を加熱溶融させて外面に合成樹脂被覆層を形
成することを特徴としている。(Means for Solving the Problems) The rust-preventive coating method for PCl4 material of the present invention solves the conventional problems as described above and achieves the intended purpose. Flow into a deposition tank, insert a steel material into the deposition tank, deposit the powder and material (=1) on the outer surface of the PC steel material, and It is characterized in that the material 1 is heated and melted to form a synthetic resin coating layer on the outer surface.
（作用）
この方法においてはＰＣ鋼材が被着槽内を通過する間に
、該ＰＣ鋼材の外面に熱可塑性樹脂粉体材料が４４着し
、これを加熱溶融させることによりＰＣ鋼材の表面に樹
脂が自らの接着性によって固着され、外面を樹脂層にて
被覆する。(Function) In this method, while the PC steel material passes through the deposition tank, 44 thermoplastic resin powder materials are deposited on the outer surface of the PC steel material, and by heating and melting this, the resin is applied to the surface of the PC steel material. are fixed by their own adhesive properties, and the outer surface is covered with a resin layer.
上記粉体材料の付着は静電気によって行わせ、そのイ・
１着後に加熱溶融させるか、もしくはＦ）Ｃ鋼材を予め
加熱しておき、これを被着槽内に通ずことによって、粉
体材料がこれに触ｔしることにより加熱溶融させ、外面
に被覆樹脂層を形成させる。The above powder material is attached using static electricity.
Either by heating and melting after the first deposition, or by heating the F) C steel material in advance and passing it through the deposition tank, the powder material comes into contact with it and is heated and melted, thereby forming a coating on the outer surface. A coating resin layer is formed.
（実施例） 次に本発明の実施例を図面を参照して説明する。(Example) Next, embodiments of the present invention will be described with reference to the drawings.
本発明によって被覆を施すＰＣ鋼材には第１図に示す如
き複数の単線１を撚り合わせたＰＣスｌ〜ランド２、第
２図に示ず如き断面が円形のＰＣ鋼棒もしくはＰＣ＠線
３、あるいは第３図に示ずり１１きス１〜ランドをタイ
内に挿通して断面が円形になるように成形したタイフォ
ー１ＮＰＣ鋼４等を使用する。The PC steel materials to be coated according to the present invention include PC strips 1 to lands 2 made by twisting a plurality of single wires 1 as shown in FIG. Alternatively, as shown in FIG. 3, tie fork 1 NPC steel 4 or the like, which is formed by inserting the pin 1 through the land into the tie and forming the cross section into a circular shape, is used.
被覆に際しては第４図に示すように、ト’ ＣＩＩ材の
巻き戻し台５にセットしたＰ鋼材ａを加熱炉６、被着槽
７、冷却槽８に一定速度にて順に連続して通し、巻き取
り台９上にてリール１０に巻き取る。For coating, as shown in Fig. 4, the P steel material a set on the unwinding table 5 for the CII material is passed through a heating furnace 6, a coating tank 7, and a cooling tank 8 in sequence at a constant speed. It is wound onto a reel 10 on a winding table 9.
加熱炉６てはＰＣＣ鋼材−後述する合成樹脂粉体材料か
溶融する温度にまで加熱するようにしている。被着槽７
は、第５図に示すように風洞１１内に長手方向に向けて
ＰＣＣ鋼材−挿通ずる。また被着槽７には一端側に粉体
吹き込み口１２が、他端側に粉体排出口１３がそれぞ７
″し開口され、吹き込み口１２から常時空気とともに合
成樹脂粉体材料を送り込み、排出口１３から排出させて
いる。The heating furnace 6 is heated to a temperature at which the PCC steel material and the synthetic resin powder material described later are melted. Adhesion tank 7
As shown in FIG. 5, the PCC steel material is inserted into the wind tunnel 11 in the longitudinal direction. The deposition tank 7 also has a powder inlet 12 at one end and a powder outlet 13 at the other end.
The synthetic resin powder material is constantly fed in together with air through the blow-in port 12 and discharged through the discharge port 13.
そしてその流動している粉体流内に加熱されたＰＣＣ鋼
材−通されることにより、そのＰＣＣ鋼材−接触した粉
体材料が表面にＩ＝Ｉ着し、溶融されて合成樹脂被覆層
１〕が形成される。As the heated PCC steel material passes through the flowing powder stream, the powder material that comes into contact with the PCC steel material adheres to the surface of the PCC steel material (I=I) and is melted to form the synthetic resin coating layer 1. is formed.
こノーシに使用する粉体材料は、接着性を有する熱可塑
性合成樹脂てあって、−例としてポリオレフィン系のも
のを使用する。The powder material used for this material is a thermoplastic synthetic resin having adhesive properties, such as a polyolefin-based material.
また、被着槽７を短くするか、あるいは粉体流中の粉体
密度を低くすることにより、第６図に示ずようにス１〜
ランド２の外面に薄い被覆層すを形成させ、ス１−、ラ
ンドの外形形状と路間し外形の被覆ＰＣ鋼材を得ること
ができる４逆に、被着槽７を長くするか、あるいは粉体
流中の粉体密度を高くすることによって、被覆層すを厚
くすることができ、この場合第７図に示すようにタイ１
４内に固化前の被覆ＰＣ鋼材を通ずことにより、ス１ヘ
ランＩ〜２の外面の凹部が合成樹脂材料によって埋めら
れ、第８図に示すような外形が円形等のタイ形状に成形
された断面形状の被覆ＰＣ鋼材を得ることがてきる。In addition, by shortening the deposition tank 7 or lowering the powder density in the powder flow, it is possible to improve the speed from 1 to 10 as shown in FIG.
By forming a thin coating layer on the outer surface of the land 2, it is possible to obtain a coated PC steel material with the outer shape of the land and the outer shape of the track. By increasing the powder density in the body flow, the thickness of the coating layer can be increased, and in this case, as shown in FIG.
By passing the pre-hardened coated PC steel material through the inside of 4, the recesses on the outer surface of the heat exchangers I to 2 are filled with the synthetic resin material, and the outer shape is formed into a circular or other tie shape as shown in Fig. 8. A coated PC steel material having a cross-sectional shape can be obtained.
上述の他、粉体材料をＰＣＣ鋼材−付着させる方法とし
て静電気を使用してもよく、この場合は第９図に示すよ
うに巻き戻し台５からのト）Ｃ鋼材ａをまず静電処理部
１５に通し、次いで前述と同様に粉体材料を流動させて
いる被着槽７、加熱炉６、冷却槽８に順次通し、巻き取
り台９のリール１０に巻き取る。一方、被着槽７に送り
込む粉体吹き込みｌ￥８１２ａに静電処理部１６を設け
ておき、粉体材料に例えばｅの電荷を与えるとともに前
述した静電処理部１５にてＰＣＣ鋼材−■の電荷を与え
ることにより被着槽７内において粉体材料をＰＣＣ鋼材
−外面に被着させ、これを加熱槽８にて加熱溶融させて
被覆層すを形成させてもよい。In addition to the above, static electricity may be used as a method for adhering the powder material to the PCC steel material. In this case, as shown in FIG. 15, and then sequentially passed through the deposition tank 7, heating furnace 6, and cooling tank 8 in which the powder material is fluidized in the same manner as described above, and wound onto the reel 10 of the winding table 9. On the other hand, an electrostatic treatment section 16 is provided in the powder blowing l\812a fed into the deposition tank 7, and the powder material is given an electric charge of e, for example, and the PCC steel material -■ is A powder material may be applied to the outer surface of the PCC steel material in the deposition tank 7 by applying an electric charge, and then heated and melted in the heating tank 8 to form a coating layer.
（発明の効果）
上記したように、本発明のＰＣ鋼材の防錆被覆方法は、
接着性を有する熱可塑性合成樹脂からなる粉体材料をＰ
Ｃ鋼材の外面に付着させて加熱溶融して被覆層を密着さ
せるようにしたことにより、ピンホールがなく、しかも
強固に接着された防錆被覆が得られることになり、耐蝕
性被覆が低コス１へにて簡単に得られることになったも
のである。(Effects of the Invention) As described above, the method for anti-corrosion coating of PC steel materials of the present invention is as follows:
Powder material made of thermoplastic synthetic resin with adhesive properties is
By attaching the coating layer to the outer surface of the C steel material and heating and melting it to make it adhere, a rust-proof coating with no pinholes and a strong bond can be obtained, making the corrosion-resistant coating low-cost. This can be easily obtained in step 1.
図面は本発明の実施例を示すもめて、第１図〜第３図は
本発明において被覆を施すＰＣ鋼材のそれぞれ別々の例
の断面図、第４図は本発明の加エエ稈の一例の概略図、
第５図は同工程中の被着槽の断面図、第６図は同被着槽
を使用した場合の被覆ＰＣ鋼線を示す断面図、第７図は
他の例の被着槽の断面図、第８図は同被着槽を使用した
場合の被覆ＰＣ鋼線の断面図、第９図は本発明の加工工
程の他の例の概略図である。
ａ・・・ＰＣ鋼材、ｂ・・・・・被覆層、２・・・・Ｐ
Ｃスｌ−ラント、３ ・・ ＰＣ鋼棒、４・・・・・・
ダイフオーム鋼、５・・・・・・巻き戻し台、６・・・
・・・加熱炉、７・・・・・被着槽、８・・・・・冷却
槽、９・・・・・・巻き取り台、１０・・・・・リール
、１１・・・・・風洞、１２・・・・・粉体吹き込み口
、１３・・・・排出口、１４・・・・・・タイ、１５．
１６・・・・・・静電処理部。The drawings show embodiments of the present invention; FIGS. 1 to 3 are cross-sectional views of separate examples of the PC steel material coated in the present invention, and FIG. 4 is a cross-sectional view of an example of the processed culm of the present invention. Schematic,
Figure 5 is a sectional view of the deposition tank during the same process, Figure 6 is a sectional view showing the coated PC steel wire when the same deposition tank is used, and Figure 7 is a cross section of another example of the deposition tank. FIG. 8 is a sectional view of a coated PC steel wire when the same coating tank is used, and FIG. 9 is a schematic view of another example of the processing process of the present invention. a...PC steel material, b...covering layer, 2...P
C sl-lant, 3... PC steel bar, 4...
Diform steel, 5... Rewinding table, 6...
... Heating furnace, 7 ... Adhesion tank, 8 ... Cooling tank, 9 ... Winding table, 10 ... Reel, 11 ... Wind tunnel, 12...Powder inlet, 13...Discharge port, 14...Tie, 15.
16... Electrostatic processing section.
Claims (1)
流動させ、該被着槽内にＰＣ鋼材を挿通させて、該ＰＣ
鋼材の外面に前記粉体材料を付着させ、その付着した粉
体材料を加熱溶融させて外面に合成樹脂被覆層を形成す
ることを特徴としてなるＰＣ鋼材の防錆被覆方法。A thermoplastic synthetic resin powder material having adhesive properties is flowed into an adhesion tank, a PC steel material is inserted into the adhesion tank, and the PC
A method for anti-rust coating of prestressed steel material, comprising the steps of: attaching the powder material to the outer surface of the steel material, and heating and melting the attached powder material to form a synthetic resin coating layer on the outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17285388A JPH0221969A (en) | 1988-07-12 | 1988-07-12 | Method for coating pc steel material to prevent rust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17285388A JPH0221969A (en) | 1988-07-12 | 1988-07-12 | Method for coating pc steel material to prevent rust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0221969A true JPH0221969A (en) | 1990-01-24 |
Family
ID=15949513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17285388A Pending JPH0221969A (en) | 1988-07-12 | 1988-07-12 | Method for coating pc steel material to prevent rust |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0221969A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05277436A (en) * | 1992-03-30 | 1993-10-26 | Times Eng:Kk | Rust-preventive coating of pc strand |
| JPH05329441A (en) * | 1992-05-28 | 1993-12-14 | Kurosawa Kensetsu Kk | Method for forming rust-preventive coat on steel wire and steel wire formed with the same |
| CN102862224A (en) * | 2012-09-30 | 2013-01-09 | 东北石油大学 | Integral manufacturing device for rough surfaces of multi-phase casings |
-
1988
- 1988-07-12 JP JP17285388A patent/JPH0221969A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05277436A (en) * | 1992-03-30 | 1993-10-26 | Times Eng:Kk | Rust-preventive coating of pc strand |
| JPH05329441A (en) * | 1992-05-28 | 1993-12-14 | Kurosawa Kensetsu Kk | Method for forming rust-preventive coat on steel wire and steel wire formed with the same |
| CN102862224A (en) * | 2012-09-30 | 2013-01-09 | 东北石油大学 | Integral manufacturing device for rough surfaces of multi-phase casings |
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