JP2001121067A - Defoaming apparatus - Google Patents

Defoaming apparatus

Info

Publication number
JP2001121067A
JP2001121067A JP29992399A JP29992399A JP2001121067A JP 2001121067 A JP2001121067 A JP 2001121067A JP 29992399 A JP29992399 A JP 29992399A JP 29992399 A JP29992399 A JP 29992399A JP 2001121067 A JP2001121067 A JP 2001121067A
Authority
JP
Japan
Prior art keywords
paint
defoaming
coating
bubbles
roll
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
JP29992399A
Other languages
Japanese (ja)
Inventor
Yukimitsu Shiobara
幸光 塩原
Katsunori Imai
克徳 今井
Chitoshi Nojima
千利 野島
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP29992399A priority Critical patent/JP2001121067A/en
Publication of JP2001121067A publication Critical patent/JP2001121067A/en
Pending legal-status Critical Current

Links

Landscapes

  • Coating Apparatus (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a defoaming apparatus with a simple structure and capable of easily improving the defoaming effect. SOLUTION: The defoaming apparatus 6 is to be installed in an intermediate part of a coating material circulation system of a coating apparatus for circulating a coating material 1 between a coating part a coating material tank 2 to coat an object material A with a coating material 1 in a coating part. The deforming apparatus 6 is provided with a defoaming treatment chamber 7 for accelerating flotation separation of foams in the coating material 1 and an evacuation means 8 for accelerating defoaming floating foams in the deforming treatment chamber 7. The defoaming treatment chamber 7 is divided into two sections 13a, 13b in the horizontal direction by one partitioning plate 12 and these two sections 13a, 13b mutually communicate with each other in the space above the partitioning plate 12 and in the coating material in the lower side and a reception part of a coating material 2 containing foams is formed in one section 13a and a discharge part of the defoamed coating material 2 is formed in the other section 13b and a suction part 15 of the evacuation means 8 is formed above the liquid surface of the latter section 13b.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、塗装部と塗料タン
ク間に塗料を循環し、塗装部で金属板等の被塗装材に塗
料を塗装する塗装装置に使用する脱泡装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defoaming apparatus used in a coating apparatus for circulating a coating material between a coating part and a coating tank and applying a coating material to a material such as a metal plate in the coating part.

【0002】[0002]

【従来の技術】塗装金属板は、ロール塗装装置で製造さ
れるものが多い。2本の塗装ロールを備えるロール塗装
装置により鋼板に塗装する場合を図2を用いて説明す
る。
2. Description of the Related Art Many coated metal sheets are manufactured by a roll coating apparatus. A case where a steel plate is coated by a roll coating apparatus having two coating rolls will be described with reference to FIG.

【0003】図2の装置において、1は塗料、2は塗料
タンク、3は塗料循環ポンプ、4a、4dは塗料配管、
5は塗料パン、9はピックアップロール、10はアプリ
ケータロール、11はバックアップロール、Sは鋼板で
ある。
In the apparatus shown in FIG. 2, 1 is a paint, 2 is a paint tank, 3 is a paint circulation pump, 4a and 4d are paint pipes,
5 is a paint pan, 9 is a pickup roll, 10 is an applicator roll, 11 is a backup roll, and S is a steel plate.

【0004】塗料1は、塗料タンク2から、塗料循環ポ
ンプ3によって塗料配管4aを経て塗料パン5に送られ
る。塗料パン5では、塗料1中に下部を浸漬したピック
アップロール9を回転して塗料1を汲み上げ、汲み上げ
た塗料1を回転するアプリケータロール10に転写し、
更にバックアップロール11に巻きかけられて走行する
鋼板Sに転写して塗装する。塗料1が塗装された鋼板S
は図示されていない焼付設備により焼付けられて塗装鋼
板になる。塗料タンク2から塗料パン5に送られた塗料
1の一部は鋼板Sに付着するが、余分な塗料1は塗料配
管4dを経て塗料タンク2に戻る。
The paint 1 is sent from a paint tank 2 to a paint pan 5 by a paint circulation pump 3 via a paint pipe 4a. In the paint pan 5, the pickup roll 9 whose lower part is immersed in the paint 1 is rotated to pump up the paint 1, and the pumped paint 1 is transferred to the rotating applicator roll 10,
Further, it is transferred and coated on a steel sheet S which is wound around a backup roll 11 and travels. Steel plate S coated with paint 1
Is baked by a baking facility (not shown) into a coated steel plate. A part of the paint 1 sent from the paint tank 2 to the paint pan 5 adheres to the steel plate S, but excess paint 1 returns to the paint tank 2 via the paint pipe 4d.

【0005】図2の装置では、ピックアップロール9で
汲み上げた余分な塗料1がアプリケータロール10で掻
き落とされ、塗料パン5に戻る際に気泡が発生する。塗
料1は塗料タンク2と塗料パン5間を循環しており、塗
料1の循環によっても気泡が発生する。気泡を含む塗料
1がピックアップロール9で汲み上げられ、アプリケー
タロール10に転写され、更に鋼板Sに転写されると、
鋼板Sに塗装欠陥が発生する。
In the apparatus shown in FIG. 2, the excess paint 1 pumped up by the pickup roll 9 is scraped off by the applicator roll 10, and bubbles are generated when returning to the paint pan 5. The paint 1 is circulating between the paint tank 2 and the paint pan 5, and the circulation of the paint 1 also generates air bubbles. When the paint 1 containing air bubbles is pumped up by the pickup roll 9, transferred to the applicator roll 10, and further transferred to the steel sheet S,
A coating defect occurs on the steel sheet S.

【0006】通常、塗料パン2では、塗料パン2に持ち
込まれる気泡が、ピックアップロール9が汲み上げる塗
料1に巻き込まれないように、塗料パン2内のピックア
ップロール9手前に、塗料1中の気泡の浮上、破泡を促
進するためのスペースや仕切板を設けている。また、気
泡が塗料パン5に蓄積されないようにするために、塗料
パン5から塗料1をオーバーフローさせて塗料タンク2
へ戻し、塗料1と一緒に気泡を塗料タンク2に排出し、
排出した気泡を塗料タンク2で浮上、破泡している。
Normally, in the paint pan 2, air bubbles introduced into the paint pan 2 are placed in front of the pickup roll 9 in the paint pan 2 so that bubbles brought into the paint pan 2 are not caught in the paint 1 pumped by the pickup roll 9. Spaces and partitions are provided to promote floating and foam breaking. In order to prevent air bubbles from accumulating in the paint pan 5, the paint 1 overflows from the paint pan 5 and the paint tank 2
And discharge air bubbles to the paint tank 2 together with the paint 1,
The discharged bubbles float in the paint tank 2 and break.

【0007】塗料1が低粘度の場合、気泡が浮上、破泡
する作用が強いため、塗料中の気泡が少ないので、ピッ
クアップロール9が汲み上げる塗料1の気泡巻き込みは
少ない。
When the paint 1 has a low viscosity, bubbles are strong in the action of floating and breaking bubbles, so that there are few bubbles in the paint, and thus the bubbles of the paint 1 pumped up by the pickup roll 9 are small.

【0008】近年、塗装鋼板の用途拡大に伴い、要求品
質が多様化し、そのため従来よりも高粘度の塗料1が使
用される場合がある。高粘度の塗料1では、気泡を浮
上、破泡する作用が不十分になる。そのため、アプリケ
ータロール10で掻き落とされた塗料1が塗料パン5に
戻る際に発生する気泡や塗料循環中に発生した気泡が破
泡せずに塗料1中に蓄積されて増加し、ピックアップロ
ール9が気泡を含む塗料1を汲み上げるようになり、塗
装欠陥の発生を防止できない。
[0008] In recent years, the required quality has been diversified with the expanded use of the coated steel sheet, and therefore, there is a case where the paint 1 having higher viscosity than before is used. With the high-viscosity paint 1, the action of floating bubbles and breaking bubbles becomes insufficient. Therefore, bubbles generated when the paint 1 scraped off by the applicator roll 10 returns to the paint pan 5 and bubbles generated during the circulation of the paint are accumulated in the paint 1 without breaking and increase, and the pickup roll is increased. 9 pumps the paint 1 containing air bubbles, and cannot prevent the occurrence of paint defects.

【0009】特開平7−100423号公報には、塗料
供給系統の途中に真空装置を備える脱泡装置を設け、塗
料から気泡を連続的に除去することが記載されている。
Japanese Patent Application Laid-Open No. 7-100423 describes that a defoaming device provided with a vacuum device is provided in the middle of a paint supply system to continuously remove bubbles from the paint.

【0010】図3は、前記公報に記載される脱泡装置で
あり、塗料パン31中の気泡を含む塗料32は、ピック
アップロール33により汲み上げられ、転送ロール34
とピックアップロール33間の転移部で薄膜状に伸ばさ
れた後、転送ロール34の表面上に転移する。転送ロー
ル34上に転移した塗料32は、真空シールロール群3
5と転送ロール34とのニップ部を通過して、真空ポン
プ36で所定の真空状態に保たれている真空室37へ入
る。
FIG. 3 shows a defoaming device described in the above-mentioned publication. A paint 32 containing bubbles in a paint pan 31 is pumped up by a pickup roll 33 and transferred to a transfer roll 34.
After being stretched into a thin film at the transition portion between the transfer roll 34 and the pickup roll 33, it is transferred onto the surface of the transfer roll 34. The paint 32 transferred onto the transfer roll 34 is applied to the vacuum seal roll group 3
After passing through a nip portion between the transfer roll 5 and the transfer roll 34, it enters a vacuum chamber 37 maintained at a predetermined vacuum state by a vacuum pump 36.

【0011】真空室37へ入った転送ロール34上の塗
料32膜中含まれる気泡は、体積膨張し、塗料膜厚が薄
いため破泡する。転送ロール34上で破泡しなかった塗
料32中の気泡は、塗料32が転送ロール34上から排
出ロール38表面上へ転移する際に受ける剪断変形によ
り破泡する。気泡が除去された脱泡済塗料32aは、排
出ロール38の回転によって真空ロール群35を経て大
気中へ排出される。
The bubbles contained in the paint 32 film on the transfer roll 34 that has entered the vacuum chamber 37 expand in volume and break because the paint film thickness is thin. The bubbles in the paint 32 that have not been broken on the transfer roll 34 break due to the shearing deformation that occurs when the paint 32 transfers from the transfer roll 34 to the surface of the discharge roll 38. The defoamed paint 32a from which the air bubbles have been removed is discharged to the atmosphere through the vacuum roll group 35 by the rotation of the discharge roll 38.

【0012】排出ロール38により真空室37から大気
中へ排出された脱泡済塗料32aは、回収ロール39の
表面に接して配設された回収手段40のスクレーパ40
aに回収され、脱泡済塗料槽41及びポンプ42を介し
て塗工部43へ供給される。
The defoamed paint 32a discharged into the atmosphere from the vacuum chamber 37 by the discharge roll 38 is scraped by the scraper 40 of the collection means 40 disposed in contact with the surface of the collection roll 39.
a, and supplied to the coating unit 43 via the defoamed paint tank 41 and the pump 42.

【0013】[0013]

【発明が解決しようとする課題】図3に示す脱泡装置
は、装置の構造が複雑であり、設備費やメンテナス費用
が高価になるという問題がある。
The defoaming device shown in FIG. 3 has a problem that the structure of the device is complicated and the equipment cost and the maintenance cost are high.

【0014】本発明は、前記事情を考慮して、塗装部と
塗料タンク間に塗料を循環し、塗装部で被塗装材に塗料
を塗装する塗装装置に使用できる、構造が簡易で脱泡効
果を上げることができる脱泡装置を提供することを目的
とする。
In consideration of the above circumstances, the present invention can be used in a coating apparatus for circulating a paint between a paint part and a paint tank and applying paint to a material to be painted in the paint part. It is an object of the present invention to provide a defoaming device capable of increasing the temperature.

【0015】[0015]

【課題を解決するための手段】前記課題を解決する本発
明の手段は以下の通りである。 (1)塗装部と塗料タンク間に塗料を循環し、塗装部で
被塗装材に塗料を塗装する塗装装置の塗料循環系の途中
に配設される脱泡装置であって、前記脱泡装置は、塗料
中の気泡の浮上分離を促進する脱泡処理室と前記脱泡処
理室で浮上した気泡の消泡を促進する排気手段を備え、
前記脱泡処理室は、その内部が1枚の仕切板で水平方向
に2つの区域に仕切られ、前記2つの区域は前記仕切板
の上方の空間及び下方の塗料中で互いに連通し、また、
一方の区域に気泡を含む塗料の受入れ部、他方の区域に
脱泡した塗料の排出部を備え、さらに他方の区域の液面
上方に前記排気手段の吸引部が配設されていることを特
徴とする脱泡装置。
Means of the present invention for solving the above problems are as follows. (1) A defoaming device provided in the middle of a paint circulating system of a coating device for circulating paint between a coating portion and a paint tank, and coating a material to be coated in a coating portion, wherein the defoaming device is provided. Is provided with a defoaming treatment chamber that promotes the floating separation of bubbles in the paint and an exhaust unit that promotes the defoaming of the bubbles that floated in the defoaming treatment chamber,
The defoaming treatment chamber is internally partitioned by a single partition plate into two sections in a horizontal direction, and the two sections communicate with each other in a space above the partition plate and a paint below the partition plate;
One of the sections is provided with a receiving section for paint containing air bubbles, the other section is provided with a discharge section for defoamed paint, and the suction section of the exhaust means is disposed above the liquid level in the other section. And defoaming device.

【0016】(2)前記(1)において、排気装置の吸
引部に、吸引した気泡を破泡するための網が配設されて
いることを特徴とする脱泡装置。
(2) The defoaming device according to (1), wherein a net for breaking the sucked air bubbles is provided in the suction portion of the exhaust device.

【0017】(3)前記(1)又は(2)において、塗
装部が塗料パンを備えるロール塗装装置であることを特
徴とする脱泡装置。
(3) The defoaming apparatus according to (1) or (2), wherein the coating section is a roll coating apparatus having a paint pan.

【0018】[0018]

【発明の実施の形態】図1は、本発明の実施の形態に係
る脱泡装置を備えるロール塗装装置の要部を示す図であ
る。以下、図1に基いて、本発明の実施の形態について
説明する。
FIG. 1 is a diagram showing a main part of a roll coating apparatus provided with a defoaming apparatus according to an embodiment of the present invention. Hereinafter, an embodiment of the present invention will be described with reference to FIG.

【0019】図1において、1は塗料、2は塗料タン
ク、3は塗料循環ポンプ、4a〜4cは塗料配管、5は
塗料パン、6は脱泡装置で消泡処理室7及び排気ポンプ
8を備える。9はピックアップロール、10はアプリケ
ータロール、11はバックアップロール、Sは鋼板であ
る。
In FIG. 1, 1 is a paint, 2 is a paint tank, 3 is a paint circulation pump, 4a to 4c are paint pipes, 5 is a paint pan, 6 is a defoaming device, and a defoaming treatment chamber 7 and an exhaust pump 8 are provided. Prepare. 9 is a pickup roll, 10 is an applicator roll, 11 is a backup roll, and S is a steel plate.

【0020】消泡処理室7は、その内部が1枚の仕切板
12で水平方向に2つの区域13a、13bに仕切ら
れ、区域13aと13bは、仕切板12の上方の空間及
び下方の塗料中で互いに連通し、また、一方の区域13
aに塗料配管4bを介して塗料パン5から排出された塗
料1を受け入れ、他方の区域13bの底部から、塗料配
管4cを介して、塗料1を塗料タンク2へ排出可能に配
設されている。また、他方の区域13bの液面上方の消
泡処理室7の側壁に排気ポンプ8の吸引管14の吸引口
15が設置されており、吸引口15に網16が設置され
ている。
The interior of the defoaming chamber 7 is horizontally partitioned by a single partition plate 12 into two sections 13a and 13b. The sections 13a and 13b are divided into a space above the partition plate 12 and a paint In one area 13
a, the paint 1 discharged from the paint pan 5 via the paint pipe 4b is received, and the paint 1 is discharged from the bottom of the other area 13b to the paint tank 2 via the paint pipe 4c. . The suction port 15 of the suction pipe 14 of the exhaust pump 8 is provided on the side wall of the defoaming chamber 7 above the liquid level in the other area 13b, and the net 16 is provided at the suction port 15.

【0021】塗料1は、塗料タンク2から、塗料循環ポ
ンプ3によって塗料配管4aを経て塗料パン5に送られ
る。塗料パン5では、塗料1中に下部を浸漬したピック
アップロール9を回転して塗料1を汲み上げ、汲み上げ
た塗料1を回転するアプリケータロール10に転写し、
更にバックアップロール11に巻きかけられて走行する
鋼板Sに転写して塗装する。塗料1が塗装された鋼板S
は図示されていない焼付設備により焼付けられて塗装鋼
板になる。
The paint 1 is sent from a paint tank 2 to a paint pan 5 by a paint circulation pump 3 via a paint pipe 4a. In the paint pan 5, the pickup roll 9 whose lower part is immersed in the paint 1 is rotated to pump up the paint 1, and the pumped paint 1 is transferred to the rotating applicator roll 10,
Further, it is transferred and coated on a steel sheet S which is wound around a backup roll 11 and travels. Steel plate S coated with paint 1
Is baked by a baking facility (not shown) into a coated steel plate.

【0022】ピックアップロール9が汲み上げた塗料1
の一部は鋼板Sに付着するが、余分な塗料1はアプリケ
ータロール10で掻き落とされ、落下して塗料パン5に
戻る。その際に気泡が発生する。発生した気泡は、余分
な塗料1とともに、塗料配管4bを経て気泡処理室7の
区域13aに排出される。区域13aでは、流れが沈静
化され、塗料1中の気泡が、仕切板12でトラップされ
て浴面上に浮上する。
Paint 1 pumped by pickup roll 9
A part of the paint adheres to the steel plate S, but the excess paint 1 is scraped off by the applicator roll 10, falls and returns to the paint pan 5. At that time, bubbles are generated. The generated bubbles are discharged to the area 13a of the bubble processing chamber 7 via the paint pipe 4b together with the excess paint 1. In the area 13a, the flow is calmed down, and the air bubbles in the paint 1 are trapped by the partition plate 12 and float on the bath surface.

【0023】気泡が浮上除去された区域13aの塗料1
は、仕切板12下方の連通部から区域13bへ流れる。
区域13bでは、区域13aで除去されなかった塗料1
中の気泡が浮上して更に脱泡が行われる。
The paint 1 in the area 13a from which air bubbles have been removed by floating
Flows from the communication part below the partition plate 12 to the area 13b.
In the area 13b, the paint 1 not removed in the area 13a
Bubbles inside float up and defoaming is further performed.

【0024】区域13aの浴面上に浮上し蓄積された気
泡の高さが仕切板12の上端を超えると、気泡は区域1
3aから区域13bへ移動し、区域13bの浴面上で区
域13bから浮上した気泡と一緒になって蓄積される。
この間に気泡同士が接触して、気泡が大粒化し、破泡す
る。
When the height of the air bubbles floating on the bath surface in the area 13a and exceeding the upper end of the partition plate 12, the air bubbles move to the area 1
It moves from 3a to zone 13b and accumulates together with air bubbles floating from zone 13b on the bath surface of zone 13b.
During this time, the bubbles come into contact with each other, so that the bubbles become large and break.

【0025】消泡処理室7の雰囲気(空気)が、排気ポ
ンプ8によって、吸引口15から吸引され、消泡処理室
8の外に排気される。それに応じて、消泡処理室7の雰
囲気が区域13aから13b、更に吸引口15へと流れ
る。これによって区域13aの気泡の区域13bへの移
動、気泡の大粒化と破泡が更に促進される。
The atmosphere (air) in the defoaming chamber 7 is sucked by the exhaust pump 8 from the suction port 15 and exhausted out of the defoaming chamber 8. In response, the atmosphere of the defoaming chamber 7 flows from the areas 13 a to 13 b and further to the suction port 15. This further promotes the movement of the bubbles in the area 13a to the area 13b, the increase in the size of the bubbles, and the breakage of the bubbles.

【0026】破泡されないで蓄積された気泡が吸引口1
5の高さに到達すると、排気ポンプ8で吸引され、吸引
口15に設置されている網16を通過する。気泡が大粒
化し、破泡しやすくなっているので、気泡が網16を通
過する際に容易に破泡し、破泡した塗料1が気泡処理室
7内に戻る。そのため、塗料1が真空ポンプ8内に入る
ことが防止される。
The air bubbles accumulated without being broken are the suction ports 1
When it reaches the height of 5, it is sucked by the exhaust pump 8 and passes through the net 16 provided at the suction port 15. Since the bubbles are large and easily broken, the bubbles easily break when passing through the net 16, and the broken paint 1 returns into the bubble treatment chamber 7. Therefore, the paint 1 is prevented from entering the vacuum pump 8.

【0027】区域13bで脱泡された脱泡済の塗料1
は、区域13b底部の排出口から塗料配管4cを経て塗
料タンク2に戻る。塗料タンク2に戻った脱泡済の塗料
1は、塗料循環ポンプ3によって再び塗料パン5に送ら
れる。
Defoamed paint 1 defoamed in area 13b
Returns from the outlet at the bottom of the area 13b to the paint tank 2 via the paint pipe 4c. The defoamed paint 1 returned to the paint tank 2 is sent again to the paint pan 5 by the paint circulation pump 3.

【0028】本装置では、脱泡装置6が、塗料パン5か
ら排出された塗料1を脱泡するように配設されているの
で、塗料循環中に発生する気泡だけでなく、ピックアッ
プロール9が汲み上げた余分な塗料1が塗料パン5に戻
る際に発生する気泡を効率よく除去でき、塗料1が高粘
度であっても、塗料循環によって気泡が塗料1中に蓄積
されて増加することを確実に防止できる。そのため、ピ
ックアップロール9が汲み上げる塗料1中の気泡の巻き
込みを防止でき、気泡巻き込みに起因する塗装欠陥の発
生を防止できる。また、脱泡装置6は構造が簡易で、設
備費やメンテナンス費用が安価で済む。
In the present apparatus, since the defoaming device 6 is arranged to defoam the paint 1 discharged from the paint pan 5, not only the bubbles generated during the circulation of the paint but also the pickup roll 9 It is possible to efficiently remove bubbles generated when the excess paint 1 that has been pumped back to the paint pan 5 and, even if the paint 1 has a high viscosity, it is ensured that bubbles are accumulated in the paint 1 and increased due to paint circulation. Can be prevented. Therefore, entrapment of air bubbles in the paint 1 pumped up by the pickup roll 9 can be prevented, and occurrence of a coating defect caused by entrainment of air bubbles can be prevented. In addition, the defoaming device 6 has a simple structure, and equipment and maintenance costs are low.

【0029】本発明の脱泡装置は、塗料を循環しながら
塗装する塗装装置の脱泡装置として広く使用できる。塗
装装置は、ロール塗装装置に限定されず、また脱泡装置
は、塗装部への塗料供給系統の途中、塗装部からの塗料
戻り系統の途中の何れに設けてもよい。ロール塗装装置
の場合、気泡の発生が多い塗料パンの後方側、すなわ
ち、塗装部から塗料タンクへの塗料戻り系統の途中に脱
泡装置を設けると、小規模な装置で脱泡効果を上げるこ
とができるのでより有効である。
The defoaming device of the present invention can be widely used as a defoaming device of a coating device for coating while circulating the coating material. The coating device is not limited to a roll coating device, and the defoaming device may be provided either in the paint supply system to the coating unit or in the paint return system from the coating unit. In the case of roll coating equipment, if a defoaming device is installed behind the paint pan where many air bubbles are generated, that is, in the middle of the paint return system from the coating part to the paint tank, the defoaming effect can be improved with a small device. Is more effective.

【0030】[0030]

【実施例】図1に示した脱泡装置6を備えるロール塗装
装置を用いて、塗料1を塗料タンク2と塗料パン5間を
循環し、各塗装ロール9,10を図1中の矢印で示すよ
うに回転して、厚さ1.0mm、幅914mmの鋼板S
に乾燥膜厚が1μmになるように塗料1を塗装し、塗装
後の鋼板の気泡に起因する塗装欠陥の発生量を調査し
た。その際、脱泡装置6に仕切板12、排気装置8の設
置有無、また排気装置8への網16の設置有無の場合に
ついて、脱泡効果を調査した。塗装欠陥の発生量は、鋼
板長さ1000m当たりの気泡に起因する塗装欠陥数で
評価した。調査結果を表1に示す。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A paint 1 is circulated between a paint tank 2 and a paint pan 5 by using a roll coating device having a defoaming device 6 shown in FIG. 1, and each coating roll 9, 10 is indicated by an arrow in FIG. Rotated as shown, a steel plate S having a thickness of 1.0 mm and a width of 914 mm
The paint 1 was coated so that the dry film thickness became 1 μm, and the amount of coating defects caused by bubbles in the coated steel sheet was examined. At that time, the defoaming effect was examined for the presence or absence of the partition plate 12 and the exhaust device 8 in the defoaming device 6 and the presence or absence of the net 16 in the exhaust device 8. The amount of paint defects was evaluated by the number of paint defects caused by bubbles per 1000 m of steel plate length. Table 1 shows the survey results.

【0031】なお、脱泡装置を備えない塗装装置(従来
装置)で前記と同様の塗装を行った場合(従来例)の鋼
板の塗装欠陥の発生率を表1に併せて記載した。
Table 1 also shows the incidence of coating defects on steel sheets when the same coating was performed with a coating apparatus (conventional apparatus) having no defoaming apparatus (conventional apparatus).

【0032】[0032]

【表1】 [Table 1]

【0033】表1から明らかなように、本発明例の鋼板
は、比較例、従来例の鋼板に比べて、塗装欠陥の発生率
が顕著に低減されている。仕切板12と網16を併設す
ると、前記効果が更に優れている。
As is evident from Table 1, the steel sheet of the present invention has a significantly reduced incidence of coating defects as compared with the steel sheets of the comparative example and the conventional steel sheet. When the partition plate 12 and the net 16 are provided side by side, the above effect is further improved.

【0034】[0034]

【発明の効果】塗装部と塗料タンク間に塗料を循環し、
塗装部で被塗装材に塗料を塗装する塗装装置に、本発明
の脱泡装置を配設すると、高粘度の塗料であっても塗料
中の気泡を効率よく脱泡できる。本発明の脱泡装置は、
構造が簡易で、設備費やメンテナンス費用が安価で済
む。
The paint is circulated between the paint section and the paint tank,
When the defoaming device of the present invention is provided in a coating device for coating a material to be coated in a coating section, bubbles in the paint can be efficiently defoamed even with a high-viscosity paint. The defoaming device of the present invention,
The structure is simple, and equipment and maintenance costs are low.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施の形態に係る脱泡装置を備えるロ
ール塗装装置を示す図。
FIG. 1 is a diagram showing a roll coating apparatus including a defoaming apparatus according to an embodiment of the present invention.

【図2】従来技術のロール塗装装置を示す図。FIG. 2 is a diagram showing a conventional roll coating apparatus.

【図3】従来技術の塗料供給系統の途中に設けた真空装
置を備える脱泡装置を示す図。
FIG. 3 is a diagram showing a defoaming device provided with a vacuum device provided in the middle of a conventional paint supply system.

【符号の説明】[Explanation of symbols]

1 塗料 2 塗料タンク 3 塗料循環ポンプ 4a〜4e 塗料配管 5 塗料パン 6 脱泡装置 7 消泡処理室 8 排気ポンプ 9 ピックアップロール 10 アプリケータロール 11 バックアップロール 12 仕切板 14 吸引管 15 吸引口 16 網 31 塗料パン 36 真空ポンプ 37 真空室 43 塗工部 S 鋼板 DESCRIPTION OF SYMBOLS 1 Paint 2 Paint tank 3 Paint circulation pump 4a-4e Paint pipe 5 Paint pan 6 Defoaming device 7 Defoaming processing chamber 8 Exhaust pump 9 Pickup roll 10 Applicator roll 11 Backup roll 12 Partition plate 14 Suction pipe 15 Suction port 16 Net 31 paint pan 36 vacuum pump 37 vacuum chamber 43 coating part S steel plate

───────────────────────────────────────────────────── フロントページの続き (72)発明者 野島 千利 東京都千代田区丸の内一丁目1番2号 日 本鋼管株式会社内 Fターム(参考) 4D011 AA01 AC04 AD03 BA12 BA13 BA20 4D075 AC21 AC84 AC95 BB56Z BB93Z CA47 DA03 DB02 EA05 4F040 AA22 AB04 AC01 BA23 CB22 DB06 DB25 4F042 AA21 CA01 CA07  ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Chitoshi Nojima 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. F-term (reference) 4D011 AA01 AC04 AD03 BA12 BA13 BA20 4D075 AC21 AC84 AC95 BB56Z BB93Z CA47 DA03 DB02 EA05 4F040 AA22 AB04 AC01 BA23 CB22 DB06 DB25 4F042 AA21 CA01 CA07

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 塗装部と塗料タンク間に塗料を循環し、
塗装部で被塗装材に塗料を塗装する塗装装置の塗料循環
系の途中に配設される脱泡装置であって、前記脱泡装置
は、塗料中の気泡の浮上分離を促進する脱泡処理室と前
記脱泡処理室で浮上した気泡の消泡を促進する排気手段
を備え、前記脱泡処理室は、その内部が1枚の仕切板で
水平方向に2つの区域に仕切られ、前記2つの区域は前
記仕切板の上方の空間及び下方の塗料中で互いに連通
し、また、一方の区域に気泡を含む塗料の受入れ部、他
方の区域に脱泡した塗料の排出部を備え、さらに他方の
区域の液面上方に前記排気手段の吸引部が配設されてい
ることを特徴とする脱泡装置。
1. A paint circulating between a paint section and a paint tank,
What is claimed is: 1. A defoaming device which is disposed in a paint circulation system of a coating device for applying a paint to a material to be coated in a coating unit, wherein said defoaming device is a defoaming process for promoting floating separation of bubbles in the paint. A chamber and exhaust means for promoting defoaming of air bubbles floated in the defoaming chamber, wherein the interior of the defoaming chamber is horizontally partitioned by a single partition plate into two sections; The two areas communicate with each other in the space above the partition plate and in the paint below, and have a receiving part for paint containing air bubbles in one part, a discharge part for defoamed paint in the other part, and the other part. A suction section of the exhaust means is disposed above the liquid level in the area of (1).
【請求項2】 排気装置の吸引部に、吸引した気泡を破
泡するための網が配設されていることを特徴とする請求
項1記載の脱泡装置。
2. The defoaming device according to claim 1, wherein a net for breaking the sucked air bubbles is provided in a suction portion of the exhaust device.
【請求項3】 塗装部が塗料パンを備えるロール塗装装
置であることを特徴とする請求項1又は2記載の脱泡装
置。
3. The defoaming device according to claim 1, wherein the coating unit is a roll coating device provided with a paint pan.
JP29992399A 1999-10-21 1999-10-21 Defoaming apparatus Pending JP2001121067A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29992399A JP2001121067A (en) 1999-10-21 1999-10-21 Defoaming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29992399A JP2001121067A (en) 1999-10-21 1999-10-21 Defoaming apparatus

Publications (1)

Publication Number Publication Date
JP2001121067A true JP2001121067A (en) 2001-05-08

Family

ID=17878571

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29992399A Pending JP2001121067A (en) 1999-10-21 1999-10-21 Defoaming apparatus

Country Status (1)

Country Link
JP (1) JP2001121067A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102258886A (en) * 2010-05-27 2011-11-30 亚泰半导体设备股份有限公司 Device for removing liquid bubbles
GB2490805A (en) * 2011-05-11 2012-11-14 Delta Print & Packaging Ltd Applying a protective coating and de-aerating the coating
CN104784978A (en) * 2015-04-14 2015-07-22 冶金自动化研究设计院 Liquid level defoaming device for flotation liquid level image recognition equipment
JP2017018930A (en) * 2015-07-15 2017-01-26 株式会社荏原製作所 Gas-liquid separator and polishing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102258886A (en) * 2010-05-27 2011-11-30 亚泰半导体设备股份有限公司 Device for removing liquid bubbles
GB2490805A (en) * 2011-05-11 2012-11-14 Delta Print & Packaging Ltd Applying a protective coating and de-aerating the coating
CN104784978A (en) * 2015-04-14 2015-07-22 冶金自动化研究设计院 Liquid level defoaming device for flotation liquid level image recognition equipment
JP2017018930A (en) * 2015-07-15 2017-01-26 株式会社荏原製作所 Gas-liquid separator and polishing device

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