WO2011093238A1 - Coating device - Google Patents
Coating device Download PDFInfo
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- WO2011093238A1 WO2011093238A1 PCT/JP2011/051197 JP2011051197W WO2011093238A1 WO 2011093238 A1 WO2011093238 A1 WO 2011093238A1 JP 2011051197 W JP2011051197 W JP 2011051197W WO 2011093238 A1 WO2011093238 A1 WO 2011093238A1
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- WIPO (PCT)
- Prior art keywords
- paint
- roll
- pan
- supply pipe
- bubbles
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0042—Degasification of liquids modifying the liquid flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
- B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
Definitions
- the present invention relates to an applicator for applying a paint to a substrate such as a metal plate, and more particularly to a roll type applicator.
- the paint As a coating device that applies paint to a base material such as a metal plate, the paint is circulated between a circulation tank and a paint pan, the paint is pumped from the paint pan by a rotating roll, and the pumped paint is applied to the base material.
- a roll type coating apparatus is known.
- FIG. 1 shows an example of such a roll type coating apparatus.
- this roll-type coating device 10 applies the coating material 2 continuously with respect to the upper surface and lower surface of the steel strip 1 to drive
- the roll-type coating device 10 includes a circulation tank 11 that stores the paint 2, a pump 12 for circulating the paint 2, an upper surface application unit 20 that applies the paint 2 to the upper surface of the steel strip 1, and a lower surface of the steel strip 1. And a lower surface application unit 30 for applying the paint 2 to the surface.
- the top surface application unit 20 receives a pick-up roll 22 that pumps up the paint 2 contained in the paint pan 21, and a paint 2 that is transported along the surface of the pick-up roll 22, and applies the paint 2 to the top surface of the steel strip 1. It has a tal roll 23 and a backup roll 24 around which the steel strip 1 is wound. Between the circulation tank 11 and the paint pan 21, a supply pipe 13 that supplies the paint 2 from the circulation tank 11 to the paint pan 21, and a recovery pipe 14 that collects excess paint 2 from the paint pan 21 into the circulation tank 11, Is provided. The supply pipe 13 and the recovery pipe 14 circulate the paint 2 between the circulation tank 11 and the paint pan 21.
- the lower surface coating unit 30 receives the pickup roll 32 that pumps up the paint 2 contained in the paint pan 31 and the paint 2 that is carried along the surface of the pickup roll 32, and the paint 2 is applied to the lower surface of the steel strip 1. And an applicator roll 33 to be applied.
- a supply pipe 15 that supplies the paint 2 from the circulation tank 11 to the paint pan 31, and a recovery pipe 16 that collects excess paint 2 from the paint pan 31 into the circulation tank 11. Is provided.
- the supply pipe 15 and the recovery pipe 16 circulate the paint 2 between the circulation tank 11 and the paint pan 31.
- the roll-type coating apparatus 10 shown in FIG. 1 is a two-roll type in which two rolls, a pickup roll and an applicator roll, are installed. In addition to the pickup roll and the applicator roll, the paint pumped up by the pickup roll. There is also a three-roll type in which a metering roll for squeezing out a part of is installed.
- Patent Document 1 proposes a roll-type coating device provided with a baffle plate that squeezes a part of the paint pumped up by a pickup roll before it reaches the metering roll.
- This device has been devised based on the idea that bubbles are generated when the paint squeezed down by the metering roll falls onto the paint liquid surface and entrains the atmosphere as a mechanism for generating bubbles.
- the generation of bubbles can be suppressed by reducing the contact between the squeezed paint and the atmosphere.
- Patent Document 2 proposes a defoaming device that defoams and defoams by rotating or reciprocating a linear body above the paint liquid surface of the paint pan and bringing it into contact with the foam on the paint liquid surface. Has been.
- Patent Document 3 discloses, as a defoaming device disposed in the middle of a paint circulation system, a defoaming treatment chamber that promotes the floating separation of bubbles in the paint, and a defoaming of bubbles that rise in the defoaming treatment chamber There has been proposed a defoaming device including an exhaust means for promoting the above.
- Patent Documents 1 to 3 Even if the techniques described in Patent Documents 1 to 3 are applied, it is not possible to sufficiently prevent the appearance of the paint from being deteriorated due to bubbles.
- Patent Document 1 the technique described in Patent Document 1 is based on a three-roll type roll coater and cannot be applied to a two-roll coater.
- Patent Documents 2 and 3 do not suppress the generation of bubbles themselves, but defoam and defoam the generated bubbles, and a large defoaming device or defoaming device is required. is there.
- the present invention has been made in view of the circumstances as described above, and an object of the present invention is to provide a coating apparatus capable of accurately suppressing the generation of bubbles and preventing the appearance of the coating from being defective.
- An applicator according to the present invention is an applicator that circulates paint between a circulation tank and a paint pan, draws the paint by a roll rotating from the paint in the paint pan, and applies the pumped paint to a substrate.
- An open hole is provided in a part of the pipe at the highest position of the pipe for supplying paint from the circulation tank to the paint pan, and a part of the supply port for supplying paint to the paint pan is connected to the paint in the paint pan. It is located above the liquid level.
- the coating apparatus According to the coating apparatus according to the present invention, it is possible to accurately suppress the generation of bubbles and prevent the appearance of the coating from being defective.
- FIG. 1 is a diagram illustrating an example of a roll-type coating apparatus.
- FIG. 2 is a diagram illustrating a bubble generation mechanism in a conventional roll type coating apparatus.
- FIG. 3 is a diagram illustrating a configuration of a coating apparatus according to an embodiment of the present invention.
- FIG. 2 is an enlarged view of a portion A (a portion surrounded by a broken line) in FIG.
- FIG. 2 shows a state in which the paint 2 is supplied from the supply pipe 13 to the paint pan 21 in the conventional roll type coating apparatus. In this state, the air layer 8 is formed in the supply pipe 13 at the highest portion of the supply pipe 13.
- the air in the air layer 8 is caught in the flow of the paint 2 in the supply pipe 13, flows into the paint pan 21 from the supply port 13 ⁇ / b> A of the supply pipe 13, enters the paint 2, and then enters the liquid level 3 of the paint 2. Ascend to the top and become bubbles 9.
- bubbles are generated by the same mechanism in part B (the part surrounded by the broken line).
- the present inventors do not involve the air in the air layer 8 in the flow of the paint 2 in the supply pipe 13 in order to suppress the generation of the bubbles 9 based on the bubble generation mechanism as described above. I came up with the idea of doing so.
- One embodiment of the present invention based on the above concept will be described with reference to the drawings. In this embodiment, the roll-type coating apparatus 10 shown in FIG. 1 is targeted.
- FIG. 3 is an enlarged view of a portion A (a portion surrounded by a broken line) in FIG. 1 according to the embodiment of the present invention, and shows a state where the paint 2 is supplied from the supply pipe 13 to the paint pan 21. .
- an open hole 18 is provided in a part of the supply pipe 13 at the highest position of the supply pipe 13, and a part 13 a of the supply port 13 ⁇ / b> A of the supply pipe 13 is a paint. 2 above the liquid level 3.
- FIG. 3 shows the portion A (the portion surrounded by a broken line) in FIG. 1, but of course the same applies to the portion B (the portion surrounded by a broken line) in FIG.
- the roll type coating apparatus 10 which is the object of this embodiment is a two-roll type, it is needless to say that the present invention can also be applied to other roll type coating apparatuses such as a three-roll type.
- a paint was applied to a cold-rolled steel strip of medium to low carbon steel having a plate thickness of 2.3 mm or less using the roll type coating device shown in FIG.
- coating was performed using the coating apparatus according to the embodiment of the present invention shown in FIG. 3, and as a conventional example, coating was performed in the conventional state shown in FIG. The results are shown in Table 1.
- the present invention can be applied to a coating apparatus that applies a paint to a base material such as a metal plate.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating Apparatus (AREA)
- Dispersion Chemistry (AREA)
Abstract
An open hole (18) is formed in a part of a supply pipe (13) at the highest position of the supply pipe (13), and a part (13a) of a supply port (13A) of the supply pipe (13) is located above the liquid surface (3) of paint (2). This can reliably deter occurrence of bubbles, and can prevent poor coating appearance.
Description
本発明は、金属板等の基材に塗料を塗布する塗布装置に関し、特に、ロール式塗布装置に関するものである。
The present invention relates to an applicator for applying a paint to a substrate such as a metal plate, and more particularly to a roll type applicator.
金属板等の基材に塗料を塗布する塗布装置として、循環タンクと塗料パンとの間で塗料を循環させ、回転するロールによって塗料パン内から塗料を汲み上げ、汲み上げられた塗料を基材に塗布するロール式塗布装置が知られている。
As a coating device that applies paint to a base material such as a metal plate, the paint is circulated between a circulation tank and a paint pan, the paint is pumped from the paint pan by a rotating roll, and the pumped paint is applied to the base material. A roll type coating apparatus is known.
図１は、そのようなロール式塗布装置の一例を示すものである。図１に示すように、このロール式塗布装置１０は、走行する鋼帯１の上面と下面とに対して連続的に塗料２を塗布するものである。ロール式塗布装置１０は、塗料２を貯留した循環タンク１１と、塗料２を循環させるためのポンプ１２と、鋼帯１の上面に塗料２を塗布する上面塗布ユニット２０と、鋼帯１の下面に塗料２を塗布する下面塗布ユニット３０とを備えている。
FIG. 1 shows an example of such a roll type coating apparatus. As shown in FIG. 1, this roll-type coating device 10 applies the coating material 2 continuously with respect to the upper surface and lower surface of the steel strip 1 to drive | work. The roll-type coating device 10 includes a circulation tank 11 that stores the paint 2, a pump 12 for circulating the paint 2, an upper surface application unit 20 that applies the paint 2 to the upper surface of the steel strip 1, and a lower surface of the steel strip 1. And a lower surface application unit 30 for applying the paint 2 to the surface.
上面塗布ユニット２０は、塗料パン２１に収容された塗料２を汲み上げるピックアップロール２２と、ピックアップロール２２の表面に沿って運ばれる塗料２を受け取り、その塗料２を鋼帯１の上面に塗布するアプリケータロール２３と、鋼帯１が巻き付くバックアップロール２４とを有している。循環タンク１１と塗料パン２１との間には、循環タンク１１から塗料パン２１に塗料２を供給する供給配管１３と、塗料パン２１から余剰の塗料２を循環タンク１１に回収する回収配管１４とが設けられている。供給配管１３と回収配管１４とは、循環タンク１１と塗料パン２１との間で塗料２を循環させている。
The top surface application unit 20 receives a pick-up roll 22 that pumps up the paint 2 contained in the paint pan 21, and a paint 2 that is transported along the surface of the pick-up roll 22, and applies the paint 2 to the top surface of the steel strip 1. It has a tal roll 23 and a backup roll 24 around which the steel strip 1 is wound. Between the circulation tank 11 and the paint pan 21, a supply pipe 13 that supplies the paint 2 from the circulation tank 11 to the paint pan 21, and a recovery pipe 14 that collects excess paint 2 from the paint pan 21 into the circulation tank 11, Is provided. The supply pipe 13 and the recovery pipe 14 circulate the paint 2 between the circulation tank 11 and the paint pan 21.
同様に、下面塗布ユニット３０は、塗料パン３１に収容された塗料２を汲み上げるピックアップロール３２と、ピックアップロール３２の表面に沿って運ばれる塗料２を受け取り、その塗料２を鋼帯１の下面に塗布するアプリケータロール３３とを有している。循環タンク１１と塗料パン３１との間には、循環タンク１１から塗料パン３１に塗料２を供給する供給配管１５と、塗料パン３１から余剰の塗料２を循環タンク１１に回収する回収配管１６とが設けられている。供給配管１５と回収配管１６とは、循環タンク１１と塗料パン３１との間で塗料２を循環させている。
Similarly, the lower surface coating unit 30 receives the pickup roll 32 that pumps up the paint 2 contained in the paint pan 31 and the paint 2 that is carried along the surface of the pickup roll 32, and the paint 2 is applied to the lower surface of the steel strip 1. And an applicator roll 33 to be applied. Between the circulation tank 11 and the paint pan 31, a supply pipe 15 that supplies the paint 2 from the circulation tank 11 to the paint pan 31, and a recovery pipe 16 that collects excess paint 2 from the paint pan 31 into the circulation tank 11. Is provided. The supply pipe 15 and the recovery pipe 16 circulate the paint 2 between the circulation tank 11 and the paint pan 31.
図１に示すロール式塗布装置１０は、ピックアップロールとアプリケータロールとの２つのロールが設置された２ロール型であるが、ピックアップロールとアプリケータロールに加えて、ピックアップロールによって汲み上げられた塗料の一部を絞り落とすミータリングロールが設置されている３ロール型のものもある。
The roll-type coating apparatus 10 shown in FIG. 1 is a two-roll type in which two rolls, a pickup roll and an applicator roll, are installed. In addition to the pickup roll and the applicator roll, the paint pumped up by the pickup roll. There is also a three-roll type in which a metering roll for squeezing out a part of is installed.
上記のようなロール式塗布装置においては、塗料の成分によってレベルの違いはあるものの、泡が発生し、時間の経過と共に泡が増加し、その泡が塗料に抱き込まれることがある。塗料に抱き込まれた泡は、塗膜中に欠陥を形成し、塗装外観の不良を招く。
In the roll type coating apparatus as described above, although there is a difference in level depending on the components of the paint, bubbles are generated, the bubbles increase with the passage of time, and the bubbles may be embraced in the paint. Foam embraced in the paint forms defects in the coating film, resulting in poor appearance of the paint.
このような背景から、泡による塗装外観の不良を防止するために、これまで各種の技術が提案されている。
From this background, various techniques have been proposed so far in order to prevent the appearance of the paint from being defective due to bubbles.
例えば、特許文献１には、ピックアップロールによって汲み上げられている塗料の一部をミータリングロールに到着する前に絞り落とす邪魔板を設けたロール式塗布装置が提案されている。
For example, Patent Document 1 proposes a roll-type coating device provided with a baffle plate that squeezes a part of the paint pumped up by a pickup roll before it reaches the metering roll.
この装置は、泡が発生するメカニズムとして、ミータリングロールによって絞り落とされた塗料が塗料液面上に落下し、大気を巻き込むことで泡が発生すると考えたことに基づいて考案されている。上記のような邪魔板を設けることによって、絞り落とされた塗料と大気の接触を少なくすることで、泡の発生を抑制することができる。
This device has been devised based on the idea that bubbles are generated when the paint squeezed down by the metering roll falls onto the paint liquid surface and entrains the atmosphere as a mechanism for generating bubbles. By providing the baffle plate as described above, the generation of bubbles can be suppressed by reducing the contact between the squeezed paint and the atmosphere.
特許文献２には、塗料パンの塗料液面の上方で、線状体を回転または往復させて、塗料液面上の泡に接触させることによって、破泡・消泡するという消泡装置が提案されている。
Patent Document 2 proposes a defoaming device that defoams and defoams by rotating or reciprocating a linear body above the paint liquid surface of the paint pan and bringing it into contact with the foam on the paint liquid surface. Has been.
特許文献３には、塗料の循環系の途中に配設される脱泡装置として、塗料中の気泡の浮上分離を促進する脱泡処理室と、その脱泡処理室に浮上した気泡の消泡を促進する排気手段とを備えた脱泡装置が提案されている。
Patent Document 3 discloses, as a defoaming device disposed in the middle of a paint circulation system, a defoaming treatment chamber that promotes the floating separation of bubbles in the paint, and a defoaming of bubbles that rise in the defoaming treatment chamber There has been proposed a defoaming device including an exhaust means for promoting the above.
しかしながら、上記の特許文献１～３に記載の技術を適用したとしても、泡による塗装外観の不良を充分には防止することができなかった。
However, even if the techniques described in Patent Documents 1 to 3 are applied, it is not possible to sufficiently prevent the appearance of the paint from being deteriorated due to bubbles.
しかも、特許文献１に記載の技術は、３ロール型のロール式塗布装置を前提にしており、２ロール式の塗布装置等には適用することができない。
Moreover, the technique described in Patent Document 1 is based on a three-roll type roll coater and cannot be applied to a two-roll coater.
また、特許文献２、３に記載の技術は、泡の発生そのものを抑止するものでなく、発生した泡を消泡・脱泡するものであり、大掛かりな消泡装置や脱泡装置が必要である。
In addition, the techniques described in Patent Documents 2 and 3 do not suppress the generation of bubbles themselves, but defoam and defoam the generated bubbles, and a large defoaming device or defoaming device is required. is there.
本発明は、上記のような事情に鑑みてなされたものであり、泡の発生を的確に抑止して、塗装外観の不良を防止することができる塗布装置を提供することを目的とする。
The present invention has been made in view of the circumstances as described above, and an object of the present invention is to provide a coating apparatus capable of accurately suppressing the generation of bubbles and preventing the appearance of the coating from being defective.
本発明に係る塗布装置は、循環タンクと塗料パンの間で塗料を循環させ、塗料パン内の塗料から回転するロールにより塗料を汲み上げ、汲み上げられた塗料を基材に塗布する塗布装置であって、循環タンクから塗料パンに塗料を供給する配管の最も高い位置において配管の一部に開放孔が設けられているとともに、塗料パンに塗料を供給する供給口の一部が塗料パン内の塗料の液面よりも上方に位置している。
An applicator according to the present invention is an applicator that circulates paint between a circulation tank and a paint pan, draws the paint by a roll rotating from the paint in the paint pan, and applies the pumped paint to a substrate. An open hole is provided in a part of the pipe at the highest position of the pipe for supplying paint from the circulation tank to the paint pan, and a part of the supply port for supplying paint to the paint pan is connected to the paint in the paint pan. It is located above the liquid level.
本発明に係る塗布装置によれば、泡の発生を的確に抑止して、塗装外観の不良を防止することができる。
According to the coating apparatus according to the present invention, it is possible to accurately suppress the generation of bubbles and prevent the appearance of the coating from being defective.
本発明者らは、泡による塗装外観の不良を確実に防止するためには、特許文献２、３に記載の技術のように、発生した泡を消泡・脱泡するのではなく、泡の発生そのものを抑止することが必要であると考えた。そして、２ロール型のロール式塗布装置においても泡が発生することから、特許文献１に記載の技術のように、３ロール型のロール式塗布装置を前提にした泡の発生メカニズムでは充分に説明できないことが想定された。
In order to reliably prevent the appearance of the coating from being deteriorated due to foam, the present inventors do not defoam and defoam the generated foam, as in the techniques described in Patent Documents 2 and 3. We thought it necessary to suppress the outbreak itself. Since bubbles are also generated in the two-roll type roll-type coating apparatus, the bubble generation mechanism based on the three-roll type roll-type coating apparatus is sufficiently explained as in the technique described in Patent Document 1. It was assumed that it was not possible.
そこで、本発明者らは、２ロール型や３ロール型であることを問わず、ロール式塗布装置において泡が発生するメカニズムについて鋭意検討を行った。その結果、本発明者らは、以下のようなメカニズムで泡が発生することを突き止めた。図２は、図１におけるＡ部（破線で囲んだ個所）の拡大図である。図２は、従来のロール式塗布装置において、供給配管１３から塗料パン２１に塗料２が供給されている状態を示している。この状態の際、供給配管１３の最も高い個所において、供給配管１３内に空気層８が形成されている。空気層８の空気は、供給配管１３内の塗料２の流れに巻き込まれて、供給配管１３の供給口１３Ａから塗料パン２１内に流れ込み、塗料２中に混入した後、塗料２の液面３上に浮上して泡９となる。図１において、Ｂ部（破線で囲んだ個所）においても同様のメカニズムで泡が発生する。
Therefore, the present inventors have conducted intensive studies on the mechanism by which bubbles are generated in a roll-type coating apparatus, regardless of whether it is a 2-roll type or a 3-roll type. As a result, the present inventors have found that bubbles are generated by the following mechanism. FIG. 2 is an enlarged view of a portion A (a portion surrounded by a broken line) in FIG. FIG. 2 shows a state in which the paint 2 is supplied from the supply pipe 13 to the paint pan 21 in the conventional roll type coating apparatus. In this state, the air layer 8 is formed in the supply pipe 13 at the highest portion of the supply pipe 13. The air in the air layer 8 is caught in the flow of the paint 2 in the supply pipe 13, flows into the paint pan 21 from the supply port 13 </ b> A of the supply pipe 13, enters the paint 2, and then enters the liquid level 3 of the paint 2. Ascend to the top and become bubbles 9. In FIG. 1, bubbles are generated by the same mechanism in part B (the part surrounded by the broken line).
したがって、本発明者らは、上記のような泡の発生メカニズムに基づいて、泡９の発生を抑止するためには、空気層８の空気が供給配管１３内の塗料２の流れに巻き込まれないようにすればよいとの考えに至った。上記の考え方に基づいてなした本発明の一実施形態を図面に基づいて説明する。この実施形態においては、図１に示したロール式塗布装置１０を対象としている。
Therefore, the present inventors do not involve the air in the air layer 8 in the flow of the paint 2 in the supply pipe 13 in order to suppress the generation of the bubbles 9 based on the bubble generation mechanism as described above. I came up with the idea of doing so. One embodiment of the present invention based on the above concept will be described with reference to the drawings. In this embodiment, the roll-type coating apparatus 10 shown in FIG. 1 is targeted.
図３は、本発明の一実施形態における、図１のＡ部（破線で囲んだ個所）の拡大図であり、供給配管１３から塗料パン２１に塗料２が供給されている状態を示している。図３に示すように、この実施形態では、供給配管１３の最も高い位置において供給配管１３の一部に開放孔１８が設けられているとともに、供給配管１３の供給口１３Ａの一部１３ａが塗料２の液面３よりも上方に位置している。
FIG. 3 is an enlarged view of a portion A (a portion surrounded by a broken line) in FIG. 1 according to the embodiment of the present invention, and shows a state where the paint 2 is supplied from the supply pipe 13 to the paint pan 21. . As shown in FIG. 3, in this embodiment, an open hole 18 is provided in a part of the supply pipe 13 at the highest position of the supply pipe 13, and a part 13 a of the supply port 13 </ b> A of the supply pipe 13 is a paint. 2 above the liquid level 3.
このような構成によれば、供給配管１３の最も高い個所において供給配管１３内に形成された空気層８が開放孔１８と供給口１３ａを介して大気と連通し、その間を空気が自由に移動できるようになる。その結果、空気層８の空気が供給配管１３内の塗料２の流れに巻き込まれることが防止され、泡９の発生が抑止される。図３は、図１のＡ部（破線で囲んだ個所）について示しているが、もちろん、図１のＢ部（破線で囲んだ個所）についても同様である。
According to such a configuration, the air layer 8 formed in the supply pipe 13 at the highest portion of the supply pipe 13 communicates with the atmosphere via the open hole 18 and the supply port 13a, and the air freely moves between them. become able to. As a result, the air in the air layer 8 is prevented from being caught in the flow of the paint 2 in the supply pipe 13 and the generation of the bubbles 9 is suppressed. FIG. 3 shows the portion A (the portion surrounded by a broken line) in FIG. 1, but of course the same applies to the portion B (the portion surrounded by a broken line) in FIG.
これにより、この実施形態においては、従来のロール式塗布装置では実現し得なかった、塗料パン内の泡を長時間に渡って激減することに成功し、美麗な外観を有する塗装金属帯を高能率かつ高歩留で安定的に製造することが可能になる。この実施形態の対象としたロール式塗布装置１０は、２ロール型であったが、本発明は、３ロール型等の他のロール式塗布装置にも適用することができることは言うまでも無い。
As a result, in this embodiment, it has succeeded in drastically reducing the foam in the paint pan over a long period of time, which could not be realized by the conventional roll type coating apparatus, and a painted metal strip having a beautiful appearance is increased. It becomes possible to manufacture stably with high efficiency and high yield. Although the roll type coating apparatus 10 which is the object of this embodiment is a two-roll type, it is needless to say that the present invention can also be applied to other roll type coating apparatuses such as a three-roll type.
本発明の実施例として、図１に示したロール式塗布装置を用いて、板厚２．３ｍｍ以下の中低炭素鋼の冷延鋼帯に塗料を塗布した。その際に、本発明例として、図３に示した本発明の一実施形態である塗布装置を用いて塗布を行うとともに、従来例として、図２に示した従来の状態で塗布を行った。その結果を表１に示す。
As an example of the present invention, a paint was applied to a cold-rolled steel strip of medium to low carbon steel having a plate thickness of 2.3 mm or less using the roll type coating device shown in FIG. At that time, as an example of the present invention, coating was performed using the coating apparatus according to the embodiment of the present invention shown in FIG. 3, and as a conventional example, coating was performed in the conventional state shown in FIG. The results are shown in Table 1.
表１に示すように、本発明例では、従来例に比べて、泡の発生が無くなって、塗装ムラが無くなるのに伴って、製造能率が約２倍と大幅に向上し、また、外観不良も激減したので、歩留まりも大幅に向上した。これによって、本発明の有効性が確認された。
As shown in Table 1, in the example of the present invention, as compared with the conventional example, the generation of bubbles is eliminated and the coating unevenness is eliminated. As a result, the production efficiency is greatly improved by about twice, and the appearance is poor. The yield also improved significantly. This confirmed the effectiveness of the present invention.
以上、本発明者らによってなされた発明を適用した実施の形態について説明したが、本実施形態による本発明の開示の一部をなす記述及び図面によって本発明が限定されることはない。すなわち、本実施形態に基づいて当業者等によりなされる他の実施形態、実施例、及び運用技術等は、全て本発明の範疇に含まれる。
As mentioned above, although the embodiment to which the invention made by the present inventors was applied has been described, the present invention is not limited by the description and the drawings that form part of the disclosure of the present invention according to this embodiment. That is, other embodiments, examples, operational techniques, and the like made by those skilled in the art based on the present embodiment are all included in the scope of the present invention.
本発明は、金属板等の基材に塗料を塗布する塗布装置に適用することができる。
The present invention can be applied to a coating apparatus that applies a paint to a base material such as a metal plate.
１ 鋼帯
２ 塗料
３ 塗料の液面
８ 空気層
９ 泡
１０ ロール式塗布装置
１１ 循環タンク
１２ ポンプ
１３ 供給配管
１３Ａ 供給配管の供給口
１３ａ 供給配管の上方供給口
１４ 回収配管
１５ 供給配管
１６ 回収配管
１８ 開放孔
２０ 上面塗布ユニット
２１ 塗料パン
２２ ピックアップロール
２３ アプリケータロール
２４ バックアップロール
３０ 下面塗布ユニット
３１ 塗料パン
３２ ピックアップロール
３３ アプリケータロール DESCRIPTION OF SYMBOLS 1Steel strip 2 Paint 3 Paint liquid level 8 Air layer 9 Foam 10 Roll type coating device 11 Circulation tank 12 Pump 13 Supply pipe 13A Supply pipe supply port 13a Supply pipe upper supply port 14 Collection pipe 15 Supply pipe 16 Collection pipe 18 Open hole 20 Upper surface coating unit 21 Paint pan 22 Pickup roll 23 Applicator roll 24 Backup roll 30 Lower surface coating unit 31 Paint pan 32 Pickup roll 33 Applicator roll
２ 塗料
３ 塗料の液面
８ 空気層
９ 泡
１０ ロール式塗布装置
１１ 循環タンク
１２ ポンプ
１３ 供給配管
１３Ａ 供給配管の供給口
１３ａ 供給配管の上方供給口
１４ 回収配管
１５ 供給配管
１６ 回収配管
１８ 開放孔
２０ 上面塗布ユニット
２１ 塗料パン
２２ ピックアップロール
２３ アプリケータロール
２４ バックアップロール
３０ 下面塗布ユニット
３１ 塗料パン
３２ ピックアップロール
３３ アプリケータロール DESCRIPTION OF SYMBOLS 1
Claims (1)
- 循環タンクと塗料パンとの間で塗料を循環させ、塗料パン内の塗料から回転するロールにより塗料を汲み上げ、汲み上げられた塗料を基材に塗布する塗布装置であって、
循環タンクから塗料パンに塗料を供給する配管の最も高い位置において配管の一部に開放孔が設けられているとともに、塗料パンに塗料を供給する供給口の一部が塗料パン内の塗料の液面よりも上方に位置していること
を特徴とする塗布装置。 A coating device that circulates paint between a circulation tank and a paint pan, pumps up the paint by a roll that rotates from the paint in the paint pan, and applies the pumped paint to a substrate.
At the highest position of the pipe that supplies the paint from the circulation tank to the paint pan, an opening hole is provided in a part of the pipe, and a part of the supply port that supplies the paint to the paint pan is a part of the paint liquid in the paint pan. An applicator characterized by being positioned above the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011800069919A CN102725075A (en) | 2010-01-29 | 2011-01-24 | Coating device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-017518 | 2010-01-29 | ||
| JP2010017518A JP5663884B2 (en) | 2010-01-29 | 2010-01-29 | Coating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011093238A1 true WO2011093238A1 (en) | 2011-08-04 |
Family
ID=44319226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2011/051197 WO2011093238A1 (en) | 2010-01-29 | 2011-01-24 | Coating device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5663884B2 (en) |
| KR (1) | KR20120110124A (en) |
| CN (1) | CN102725075A (en) |
| WO (1) | WO2011093238A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011156442A (en) * | 2010-01-29 | 2011-08-18 | Jfe Steel Corp | Coating apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5513683U (en) * | 1978-07-12 | 1980-01-28 | ||
| JPH0173371U (en) * | 1987-11-02 | 1989-05-17 | ||
| JPH0478465A (en) * | 1990-07-18 | 1992-03-12 | Showa Alum Corp | Method and device for applying mat overcoating liquid |
| JP2000084453A (en) * | 1998-09-14 | 2000-03-28 | Fuji Kikai Kogyo Kk | Apparatus for supplying coating liquid to plate cylinder |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6473371A (en) * | 1987-09-14 | 1989-03-17 | Minolta Camera Kk | Image noise preventing device for copying machine |
| JP5663884B2 (en) * | 2010-01-29 | 2015-02-04 | Ｊｆｅスチール株式会社 | Coating device |
-
2010
- 2010-01-29 JP JP2010017518A patent/JP5663884B2/en not_active Expired - Fee Related
-
2011
- 2011-01-24 CN CN2011800069919A patent/CN102725075A/en active Pending
- 2011-01-24 WO PCT/JP2011/051197 patent/WO2011093238A1/en active Application Filing
- 2011-01-24 KR KR1020127019014A patent/KR20120110124A/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5513683U (en) * | 1978-07-12 | 1980-01-28 | ||
| JPH0173371U (en) * | 1987-11-02 | 1989-05-17 | ||
| JPH0478465A (en) * | 1990-07-18 | 1992-03-12 | Showa Alum Corp | Method and device for applying mat overcoating liquid |
| JP2000084453A (en) * | 1998-09-14 | 2000-03-28 | Fuji Kikai Kogyo Kk | Apparatus for supplying coating liquid to plate cylinder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011156442A (en) * | 2010-01-29 | 2011-08-18 | Jfe Steel Corp | Coating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20120110124A (en) | 2012-10-09 |
| CN102725075A (en) | 2012-10-10 |
| JP5663884B2 (en) | 2015-02-04 |
| JP2011156442A (en) | 2011-08-18 |
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