JP2810829B2 - Painting method and equipment - Google Patents
Painting method and equipmentInfo
- Publication number
- JP2810829B2 JP2810829B2 JP4300161A JP30016192A JP2810829B2 JP 2810829 B2 JP2810829 B2 JP 2810829B2 JP 4300161 A JP4300161 A JP 4300161A JP 30016192 A JP30016192 A JP 30016192A JP 2810829 B2 JP2810829 B2 JP 2810829B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- coating
- paint
- collected
- tank
- 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.)
- Expired - Fee Related
Links
Landscapes
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、塗装方法および装置
に関し、詳しくは、周りを囲まれた空間内で被塗装物に
塗料液を噴霧塗装する、いわゆる塗装ブースを用いた塗
装方法と、このような塗装方法を実施するための塗装装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating method and apparatus, and more particularly, to a coating method using a so-called coating booth in which a coating liquid is spray-coated on an object to be coated in an enclosed space. The present invention relates to a coating apparatus for performing such a coating method.
【０００２】[0002]
【従来の技術】従来、噴霧塗装において、ウォーターカ
ーテンブースが用いられている。ウォーターカーテンブ
ースは、周囲を囲った塗装ブース内に、ウォーターカー
テン装置を備えている。ウォーターカーテン装置は、塗
装ブース内で垂直な壁面に水を流して、薄い膜状のウォ
ーターカーテンを形成させ、このウォーターカーテンで
塗料ミストを捕集して、塗装ブースの壁面に塗料が付着
するのを防ぐ。塗料ミストを捕集したウォーターカーテ
ンの水は回収されて、ウォーターカーテンに繰り返し循
環供給される。2. Description of the Related Art Conventionally, a water curtain booth has been used in spray coating. The water curtain booth includes a water curtain device in a coating booth surrounding the water curtain booth. The water curtain device allows water to flow on vertical walls in the coating booth to form a thin film-like water curtain, which collects paint mist and paint adheres to the walls of the coating booth. prevent. The water of the water curtain that has collected the paint mist is collected and repeatedly circulated to the water curtain.
【０００３】また、塗装ブース内に気流を作って、噴霧
された塗料を、気流とともに被塗装物に確実に到達させ
るようにして、被塗装物の塗装に利用される塗料の割合
を増やしたり、被塗装物に塗装されなかった塗料ミスト
を、気流とともに前記ウォーターカーテンに確実に接触
させるようにして、塗料ミストをウォーターカーテンに
効率的に捕集させるようにすることも考えられた。さら
に、ウォーターカーテンに多数の隙間を設けておいて、
気流がウォーターカーテンに接触し易くしておくことも
考えられた。[0003] In addition, an airflow is created in a coating booth to ensure that the sprayed paint reaches the object to be coated together with the airflow, thereby increasing the proportion of the paint used for coating the object to be coated. It has also been considered that the paint mist that has not been applied to the object to be coated is reliably brought into contact with the water curtain together with the airflow, so that the paint mist is efficiently collected by the water curtain. Furthermore, leaving a number of gaps in the water curtain,
It was conceived that the airflow could easily contact the water curtain.
【０００４】このように、塗装ブース内に気流を作る場
合、気流の排気口が、外部環境と通じているので、ここ
から、塗料ミストが漏れる問題がある。そこで、塗装ブ
ースの排気口に、気流が衝突する邪魔板を設けて、気流
中の塗料ミストを落下捕集したり、排気口にフィルタを
設けて、塗料ミストを捕集することが考えられた。この
ような従来における塗装ブースの具体的構造は、例え
ば、特開昭５１−５０３３６号公報、特開昭６４−３８
１５９号公報、特公昭５９−２２５８４号公報などに開
示されている。[0004] As described above, when an airflow is created in the coating booth, there is a problem that the paint mist leaks from the airflow exhaust port because the airflow outlet communicates with the external environment. Therefore, it was conceivable to provide a baffle plate against which an air current collides at the exhaust port of the coating booth to drop and collect paint mist in the air stream, or to provide a filter at the exhaust port to collect paint mist. . The specific structure of such a conventional coating booth is described in, for example, JP-A-51-50336 and JP-A-64-38.
No. 159 and Japanese Patent Publication No. 59-22584.
【０００５】[0005]
【発明が解決しようとする課題】ところが、前記したよ
うな従来の塗装ブースを用いた塗装方法および装置で
は、塗料および溶媒の利用効率が十分ではなく、塗料あ
るいは溶媒を外部に排出するため、これら塗料および溶
媒の廃棄処理あるいは環境汚染防止が必要になり、結果
的に、塗装コストを増大させるという問題があった。However, in the coating method and apparatus using the conventional coating booth as described above, the utilization efficiency of the paint and the solvent is not sufficient, and the paint or the solvent is discharged to the outside. It is necessary to dispose of paints and solvents or to prevent environmental pollution, and as a result, there has been a problem that coating costs are increased.
【０００６】たとえば、ウォーターカーテンでは、定期
的に、循環水を廃棄して新鮮な水と交換する必要がある
が、このとき廃棄される循環水には、大量の塗料を含ん
でおり、これが環境を汚染するという問題がある。排気
フィルタへの塗料付着量が増えれば、フィルタを交換す
るが、廃棄されるフィルタには塗料が付着しており、こ
れも環境汚染の原因となる。For example, in a water curtain, it is necessary to periodically discard circulating water and replace it with fresh water. The circulating water discarded at this time contains a large amount of paint, which is an environmental problem. There is a problem of contamination. If the amount of paint applied to the exhaust filter increases, the filter is replaced. However, paint is attached to the discarded filter, which also causes environmental pollution.
【０００７】また、何れの場合も、噴霧塗装手段から噴
霧された塗料のうち、被塗装物の塗装に利用されなかっ
た塗料は、最終的には全て廃棄されることになるので、
塗料の無駄が多く、経済的ではない。そこで、この発明
の課題は、上記のような従来の方法および装置の問題点
を解消し、塗料あるいは溶媒の排出を出来るだけ少なく
して、環境汚染を防ぐとともに、塗料および溶媒の有効
利用を図り、塗装ブースを用いた噴霧塗装方法を、能率
的に、かつ、経済的に行うことのできる方法および装置
を提供することにある。[0007] In any case, among the paints sprayed from the spray coating means, paints not used for painting the object to be coated are eventually discarded, so that
Waste of paint is great and not economical. Therefore, an object of the present invention is to solve the problems of the conventional method and apparatus as described above, to reduce the discharge of paint or solvent as much as possible, to prevent environmental pollution, and to make effective use of paint and solvent. It is an object of the present invention to provide a method and an apparatus which can efficiently and economically perform a spray coating method using a coating booth.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決する、こ
の発明にかかる塗装方法は、塗装ブース内で、噴霧塗装
手段から塗料液を噴霧して被塗装物に塗装を行い、被塗
装物に塗装されなかった噴霧塗料を塗料捕集手段で溶媒
に捕集させ、捕集された塗料を含む溶媒を貯液槽に集
め、この捕集液を前記塗料液捕集手段に循環供給すると
ともに、塗装ブースからの排気中に含まれる塗料を排気
フィルタで捕集する塗装方法において、貯液槽に集めら
れた捕集液を回収液槽に送り、回収液槽に循環接続され
た濃縮分離手段で、所定濃度の塗料液と濾液とに分離
し、得られた塗料液を噴霧塗装手段に供給し、同じく得
られた濾液を排気フィルタの洗浄手段に供給し、排気フ
ィルタで捕集された塗料を前記濾液に溶解させて貯液槽
に集める。According to the present invention, there is provided a coating method comprising: spraying a coating liquid from a spray coating means in a coating booth to apply a coating liquid to a coating object; The unpainted spray paint is collected in a solvent by a paint collecting means, a solvent containing the collected paint is collected in a liquid storage tank, and the collected liquid is circulated and supplied to the paint liquid collecting means. In a coating method in which paint contained in exhaust gas from a coating booth is collected by an exhaust filter, a collected liquid collected in a storage tank is sent to a collection liquid tank, and concentrated and separated by means of a circulating connection to the collection liquid tank. Separated into a predetermined concentration of the coating liquid and the filtrate, the obtained coating liquid is supplied to the spray coating means, the obtained filtrate is supplied to the exhaust filter cleaning means, and the paint collected by the exhaust filter is removed. Dissolve in the filtrate and collect in the reservoir.
【０００９】塗装ブースの基本的な構造は、各種物品の
塗装に利用されている通常の塗装ブースと同様の構造が
採用できる。被塗装物は、ハンガーコンベアなどの搬送
手段で、塗装ブース内への搬入搬出を自動的かつ連続的
に行えるようにしておくのが好ましい。噴霧塗装手段と
しては、被塗装物の形状や塗装位置を合わせて、通常の
スプレーノズルなどを、単独あるいは複数個、必要な位
置に配置しておけばよい。噴霧塗装手段は、所定濃度の
塗料液を溜めた塗料槽に連結しておく。後述するよう
に、塗料槽には、塗装ブース内で捕集され濃縮分離され
た塗料が供給されるが、外部から新規な塗料液を供給す
ることもできるようにしておく。The basic structure of a painting booth can be the same as that of a normal painting booth used for painting various articles. It is preferable that the object to be coated can be automatically and continuously transferred into and out of the coating booth by a transfer means such as a hanger conveyor. As the spray coating means, a single or a plurality of ordinary spray nozzles may be arranged at necessary positions according to the shape and the coating position of the object to be coated. The spray coating means is connected to a paint tank having a predetermined concentration of the paint liquid. As will be described later, the paint that is collected and concentrated and separated in the paint booth is supplied to the paint tank, but a new paint liquid can be supplied from the outside.
【００１０】この発明では、塗料として、水溶性塗料を
用いるのが好ましく、この水溶性塗料の溶媒としては、
水または水を主成分として、これに各種の添加剤が加え
られた液体が使用できる。塗料捕集手段は、塗装作業を
行いながら、被塗装物に塗装されなかった塗料液すなわ
ち塗料ミストを捕集して、最終的に溶媒に溶解させた状
態で回収できる機構を備えていれば、従来の各種塗装装
置で利用されていた塗料捕集手段を、自由に組み合わせ
て使用することができる。[0010] In the present invention, it is preferable to use a water-soluble paint as the paint.
Water or a liquid containing water as a main component and various additives added thereto can be used. The paint collecting means is provided with a mechanism capable of collecting a paint liquid, that is, a paint mist that has not been applied to the object to be coated, while collecting the paint, and finally collecting the paint mist dissolved in the solvent. Paint collection means used in various conventional coating apparatuses can be freely combined and used.
【００１１】塗料捕集手段として、塗装ブース内の床面
に、貯液槽を設けておけば、塗装ブース内に飛散した塗
料ミストが、重力の作用で落下して貯液槽に捕集され
る。貯液槽には、水その他の塗料を溶解する溶媒を溜め
ておき、塗料を溶媒に溶解させた状態で回収する。貯液
槽は、捕集液がよどんだり、捕集液に含まれる塗料が底
に溜まったりし難い構造のものが好ましい。貯液槽に攪
拌手段を設けておけば、塗料が底に沈んだり、塗料の濃
度に偏りが生じたりすることが防げる。塗装ブース内の
床面から貯液槽の液面にかけて、水などの溶媒を流せ
ば、この溶媒の液面で塗料ミストを捕集することができ
る。If a liquid storage tank is provided on the floor in the coating booth as a means for collecting paint, the paint mist scattered in the coating booth falls by the action of gravity and is collected in the liquid storage tank. You. In the liquid storage tank, water and other solvents for dissolving the paint are stored, and the paint is recovered in a state of being dissolved in the solvent. The liquid storage tank preferably has a structure in which the collected liquid does not stagnate, and the paint contained in the collected liquid does not easily accumulate at the bottom. By providing a stirring means in the liquid storage tank, it is possible to prevent the paint from sinking to the bottom and to prevent unevenness in the concentration of the paint. If a solvent such as water is allowed to flow from the floor surface in the coating booth to the liquid surface of the storage tank, the paint mist can be collected on the liquid surface of the solvent.
【００１２】塗料捕集手段として、ウォーターカーテン
が使用できる。ウォーターカーテンは、液体を垂直な壁
面などに沿って膜状に流下させて、この流下液面で噴霧
塗料すなわち塗料ミストを捕集するものであり、その具
体的構造は、従来の塗装ブースに設置されていたものと
同様の構造が採用できる。ウォーターカーテンを流下し
た液体は、前記貯液槽に集められるようにしておく。ウ
ォーターカーテンに用いる液体には、通常は水が用いら
れるが、塗料を良好に溶解できる各種溶媒、あるいは、
水に各種の添加剤が配合された溶媒も使用できる。この
発明では、ウォーターカーテンで使用した液体が、噴霧
塗装の際の塗料液を構成する溶媒となるので、噴霧塗装
用の塗料溶媒として適した液体を用いるのが好ましい。As a means for collecting paint, a water curtain can be used. Water curtains are used to make a liquid flow down along a vertical wall, etc., in a film form, and to collect spray paint, that is, paint mist, at the surface of the flowing liquid. A structure similar to that which has been used can be adopted. The liquid flowing down the water curtain is collected in the liquid storage tank. The liquid used for the water curtain is usually water, but various solvents that can dissolve the paint well, or
A solvent in which various additives are mixed with water can also be used. In the present invention, since the liquid used in the water curtain is a solvent constituting the coating liquid at the time of spray coating, it is preferable to use a liquid suitable as a coating solvent for spray coating.
【００１３】ウォーターカーテンにおいて、液体を膜状
に流下させる壁面に、水平方向あるいは垂直方向の隙間
を多数備えておくと、これらの隙間を、気流あるいは塗
料ミストが通過するので、塗料ミストと流下液面との接
触の可能性が増え、塗料ミストの捕集効率が高まる。上
記したウォーターカーテンの具体的構造として、特開昭
５１−５０３３６号公報や、特開昭５９−２２５８４号
公報に開示された構造が採用できる。In a water curtain, when a large number of horizontal or vertical gaps are provided on a wall surface on which a liquid flows down in a film form, an air current or a paint mist passes through these gaps. The possibility of contact with the surface increases, and the collection efficiency of paint mist increases. As a specific structure of the above-mentioned water curtain, the structures disclosed in JP-A-51-50336 and JP-A-59-22584 can be adopted.
【００１４】塗料捕集手段として、塗装ブース内の空間
と貯液槽内とを循環移動する無端状の塗料捕集面を備え
たものが用いられる。塗料捕集面は塗料が付着する材料
であれば任意の材料からなるものが使用できる。塗料捕
集面に、表裏に連通する多数の通気孔を備えておけば、
この通気孔を気流および塗料ミストが通過することによ
って、塗料捕集面に塗料ミストが捕集され易くなる。具
体的な塗料捕集面の材料として、不織布や金網などが利
用できる。塗料捕集面は、柔軟なベルト状のものであっ
てもよいし、板材を屈曲自在に連結したキャタピラ状の
ものであってもよい。As the paint collecting means, one having an endless paint collecting surface which circulates and moves between the space in the coating booth and the liquid storage tank is used. The paint collecting surface can be made of any material as long as the paint adheres to the material. If you have a large number of ventilation holes communicating with the front and back on the paint collection surface,
When the airflow and the paint mist pass through the ventilation holes, the paint mist is easily collected on the paint collecting surface. As a specific material for the paint collecting surface, a nonwoven fabric or a wire mesh can be used. The paint collecting surface may be a flexible belt-like surface, or may be a caterpillar-like shape in which plate members are flexibly connected.
【００１５】塗料捕集手段として、前記同様の塗料捕集
面と、この塗料捕集面に溶媒を噴射して塗料液を溶媒に
捕集させる溶媒噴射手段を備えたものが用いられる。溶
媒には、前記したウォーターカーテンで用いた流下液体
と同様のものが用いられる。塗料捕集面に噴射された溶
媒は、前記貯液槽に集められるようにしておく。塗料捕
集面が、塗装ブース内の噴霧塗料を捕集する位置、すな
わち、被塗装物に近接する位置と、これとは離れた位置
に設けられた溶媒噴射手段の設置位置との間を循環移動
するようになっていれば、塗料捕集面への塗料の付着捕
集と、塗料捕集面からの塗料の溶媒による回収の両方
を、効率的に行える。As the paint collecting means, one having a paint collecting surface similar to that described above and a solvent spraying means for spraying a solvent onto the paint collecting surface to collect the coating liquid in the solvent is used. As the solvent, the same solvent as the flowing liquid used in the above-described water curtain is used. The solvent sprayed on the paint collecting surface is collected in the liquid storage tank. The paint collecting surface circulates between a position for collecting the spray paint in the coating booth, that is, a position close to the object to be coated and a position where the solvent spray means provided at a position apart from the position. If it moves, both the adhesion and collection of the paint on the paint collecting surface and the recovery of the paint from the paint collecting surface by the solvent can be efficiently performed.
【００１６】上記のような塗料捕集手段の具体的構造と
して、特開昭６４−３８１５９号公報に開示された構造
が採用できる。貯液槽と、前記塗料捕集手段とは、ポン
プやバルブなどを備えた捕集液循環配管系で連結してお
き、貯液槽に集められた塗料を含む捕集液を、塗料捕集
手段で繰り返し利用できるようにしておく。As a specific structure of the paint collecting means as described above, the structure disclosed in Japanese Patent Application Laid-Open No. 64-38159 can be employed. The liquid storage tank and the paint collecting means are connected to each other by a collected liquid circulation piping system having a pump, a valve, and the like, and the collected liquid containing the paint collected in the liquid storage tank is collected. Make it available repeatedly by means.
【００１７】塗装ブースに気流を発生させれば、被塗装
物に塗装されなかった塗料ミストを、被塗装物の周囲か
ら取り除いたり、塗料ミストを、ウォーターカーテンな
どの塗料捕集手段に効率的に接触させたりすることがで
きる。塗装ブースに気流を発生させるには、送風ファン
あるいは排気ファンを設けておけばよい。塗装ブースに
は、換気用の排気口および必要であれば吸気口を設けて
おく。排気口があると、前記した気流の発生が効率良く
行われる。排気口には排気フィルタを設けておく。排気
フィルタは、塗料ミストを良好に捕集できるような材料
および構造からなるものが好ましい。排気フィルタは、
塗料を補集する点では、前記した塗料補集手段と同じ機
能を有しているが、塗装作業中に補集された塗料ミスト
は、排気フィルタに付着した状態で溜められ、前記した
塗料補集手段のように、直ちに溶媒に溶解させて回収す
るものではない点で、塗料補集手段とは異なる。排気フ
ィルタには、塗装作業が終わった後で排気フィルタに付
着した塗料ミストを排気フィルタから取り除くための洗
浄手段を備えておく。洗浄手段は、塗料を溶解する溶媒
を噴射して、排気フィルタから塗料を洗い流す。洗い流
された塗料を含む溶媒は、前記貯液槽に集められるよう
にしておく。If an airflow is generated in the coating booth, paint mist that has not been applied to the object to be coated can be removed from the periphery of the object to be coated, or the paint mist can be efficiently collected by a paint collecting means such as a water curtain. Contact. In order to generate an air current in the painting booth, a ventilation fan or an exhaust fan may be provided. The painting booth shall be provided with an exhaust vent for ventilation and, if necessary, an intake vent. When there is an exhaust port, the above-described airflow is efficiently generated. An exhaust filter is provided in the exhaust port. The exhaust filter is preferably made of a material and a structure that can satisfactorily collect paint mist. The exhaust filter is
It has the same function as the above-mentioned paint collection means in that the paint is collected, but the paint mist collected during the painting operation is accumulated in a state of being attached to the exhaust filter, and the above-mentioned paint collection means is collected. It differs from the paint collection means in that it is not immediately dissolved and recovered in a solvent like the collection means. The exhaust filter is provided with cleaning means for removing paint mist adhering to the exhaust filter from the exhaust filter after the painting operation is completed. The cleaning means injects a solvent that dissolves the paint to wash the paint from the exhaust filter. The solvent containing the washed-out paint is collected in the storage tank.
【００１８】塗装ブースの排気口付近に、気流を衝突さ
せて、その中に含まれる塗料ミストを捕集する邪魔板を
設けておくことができる。また、前記したウォーターカ
ーテンなどの塗料捕集手段と貯液槽の液面の間に、わず
かな隙間をあけておき、この隙間を気流が通過するよう
にしておけば、気流がウォーターカーテンあるいは貯液
槽の液面に効率良く接触して、塗料ミストの捕集が良好
に行われる。貯液槽の液面近くに、気流を当てて、その
流れ方向を変える渦流板を設けておけば、気流中の塗料
ミストを良好に捕集することができる。[0018] A baffle plate may be provided near the exhaust port of the coating booth to collide the airflow and collect paint mist contained therein. If a slight gap is provided between the paint collecting means such as the water curtain and the liquid surface of the liquid storage tank, and the air flow passes through the gap, the air flow can be reduced by the water curtain or the storage space. The paint mist is collected well by efficiently contacting the liquid surface of the liquid tank. If a swirl plate is provided near the liquid surface of the liquid storage tank to change the flow direction by applying an airflow, paint mist in the airflow can be collected well.
【００１９】つぎに、前記したような、捕集手段に循環
供給する捕集液循環配管系とは別に、捕集液循環配管系
に切換自在に接続される濃縮分離配管系を備えておく。
濃縮分離配管系には、貯液槽の捕集液を収容する回収液
槽を備えている。すなわち、貯液槽と回収液槽が配管で
連結されており、貯液槽の捕集液を、前記したように、
塗料捕集手段に供給するか、回収液槽に供給するかを、
配管中の切換バルブなどで切換可能になっている。回収
液槽の容量は、貯液槽に溜まった捕集液の全量を収容で
きる程度に設定されている。Next, in addition to the above-described collected liquid circulation piping system for circulating the collected liquid to the collection means, a concentration / separation piping system that is switchably connected to the collected liquid circulation piping system is provided.
The concentration / separation piping system is provided with a collection liquid tank for storing the collected liquid in the liquid storage tank. That is, the liquid storage tank and the recovery liquid tank are connected by piping, and the collected liquid in the liquid storage tank is, as described above,
Whether to supply to the paint collection means or supply to the recovery liquid tank,
Switching is possible with a switching valve in the piping. The capacity of the recovery liquid tank is set to an amount that can accommodate the entire amount of the collected liquid stored in the storage tank.
【００２０】回収液槽には、濃縮分離手段が循環連結さ
れている。濃縮分離手段は、捕集液中に含まれる塗料成
分を、その他の溶媒成分などから濃縮分離できれば、各
種の液体の濃縮分離に利用されている通常の濃縮分離手
段が用いられる。具体的には、各種の濾過装置が使用で
きる。濃縮分離手段として、限外濾過装置を用いれば、
目的とする塗料成分を効率的に濃縮分離することができ
る。回収液槽と濃縮分離手段の間を、捕集液が繰り返し
循環させられているうちに、塗料液と濾液とが分離され
る。分離された塗料液は、前記噴霧塗装手段に連結され
た塗料槽に収容される。濾液は、濾液槽に収容されると
ともに、前記排気フィルタの洗浄手段に濾液を供給でき
るように配管されている。また、排気フィルタの洗浄手
段とともに、前記塗料補集手段にも濾液を供給できるよ
うに配管しておくこともできる。Concentration / separation means is circulated and connected to the recovery liquid tank. As the concentration and separation means, a normal concentration and separation means used for concentration and separation of various liquids is used as long as the paint component contained in the collected liquid can be concentrated and separated from other solvent components and the like. Specifically, various filtration devices can be used. If an ultrafiltration device is used as the concentration separation means,
The desired paint component can be efficiently concentrated and separated. The coating liquid and the filtrate are separated while the collected liquid is repeatedly circulated between the recovery liquid tank and the concentration / separation means. The separated coating liquid is stored in a coating tank connected to the spray coating means. The filtrate is accommodated in a filtrate tank, and is piped so that the filtrate can be supplied to the washing means of the exhaust filter. Further, piping may be provided so that the filtrate can be supplied not only to the exhaust filter cleaning means but also to the paint collection means.
【００２１】この発明では、水などの溶媒は繰り返し使
用されるので、溶媒の廃棄や交換は必要ないが、使用中
に蒸発したりして減少する溶媒量を補充するために、前
記した捕集液循環配管系あるいは濃縮分離配管系には、
外部から水などの溶媒を供給できるようにしておくのが
好ましい。以上に説明したような、回収液槽や濃縮分離
手段を含む濃縮分離配管系を複数組備えておき、各濃縮
分離配管系が、選択的に捕集液循環配管系に接続可能に
しておくことができる。濃縮分離配管系が複数組あれ
ば、それぞれの配管系で異なる色の塗料を処理すること
ができ、塗装色の変更が能率的に行える。In the present invention, since the solvent such as water is used repeatedly, there is no need to dispose or replace the solvent. However, in order to supplement the amount of the solvent which is reduced by evaporation during use, the above-mentioned collection is performed. For the liquid circulation piping system or the concentration separation piping system,
It is preferable that a solvent such as water can be supplied from the outside. As described above, a plurality of sets of concentration / separation piping systems including the recovery liquid tank and the concentration / separation means are provided, and each concentration / separation piping system should be selectively connectable to the collection liquid circulation piping system. Can be. If there are a plurality of concentration / separation piping systems, paints of different colors can be processed in each piping system, and the coating color can be changed efficiently.
【００２２】[0022]
【作用】この発明では、塗装ブース内に噴霧された塗料
液のうち、被塗装物に塗装されなかった塗料ミストを、
適宜の塗料捕集手段で、最終的に溶媒に溶解させた状態
で捕集して、貯液槽に集める。また、排気フィルタで捕
集された塗料ミストも、塗装作業が終了した後、洗浄手
段を用いて、溶媒に溶解させた状態で、貯液槽に集め
る。According to the present invention, the paint mist that has not been applied to the object to be coated, out of the coating liquid sprayed into the coating booth,
The liquid is finally collected in a state of being dissolved in a solvent by an appropriate paint collecting means, and collected in a liquid storage tank. After the coating operation is completed, the paint mist collected by the exhaust filter is also collected in the liquid storage tank in a state of being dissolved in a solvent by using a washing unit.
【００２３】このようにして、貯液槽に集められた補集
液すなわち塗料を含む溶媒を、回収液槽に送って、濃縮
分離手段で、塗料液と濾液に分離したのち、塗料液は再
び塗装に利用し、濾液も排気フィルタの洗浄に利用する
ので、被塗装物に塗装された塗料を除けば、外部に廃棄
される塗料液および溶媒はほとんど無い。すなわち、こ
の塗装システムは、ほぼ完全な閉回路システムとして機
能するのである。In this manner, the collected liquid collected in the storage tank, that is, the solvent containing the paint, is sent to the recovery liquid tank, and is separated into the paint liquid and the filtrate by the concentration separation means. Since it is used for painting and the filtrate is also used for cleaning the exhaust filter, almost no paint liquid and solvent are discarded outside except for the paint applied to the object to be coated. That is, the coating system functions as a nearly complete closed circuit system.
【００２４】また、塗装ブースにおいて噴霧塗装を行う
際に塗料ミストの捕集を行う捕集液循環配管系と、捕集
液から塗料液と溶媒とを分離する濃縮分離配管系とが、
切換自在に接続されていて、互いに分離されているの
で、塗装ブースにおける噴霧塗装は、従来の塗装方法と
全く変わりなく良好に行いながら、濃縮分離配管系で
は、貯液槽から回収された捕集液を塗料液と濾液とに分
離する作業を行うことができる。すなわち、塗装ブース
における作業を中断することなく、塗料および濾液の分
離回収を行って、この分離回収された塗料および濾液
を、次の塗装作業あるいは排気フィルタの洗浄作業に直
ちに利用することができるのである。Further, a collection liquid circulation pipe system for collecting paint mist when spray coating is performed in a coating booth, and a concentration separation pipe system for separating a coating liquid and a solvent from the collected liquid,
Since they are connected to each other and are separated from each other, spray coating in the coating booth can be performed in the same manner as the conventional coating method, while collecting and collecting from the liquid storage tank in the concentration separation piping system. An operation of separating the liquid into a coating liquid and a filtrate can be performed. That is, the paint and the filtrate can be separated and recovered without interrupting the work in the coating booth, and the separated and recovered paint and the filtrate can be immediately used for the next coating operation or the cleaning operation of the exhaust filter. is there.
【００２５】[0025]
【実施例】ついで、この発明の実施例について、図面を
参照しながら以下に説明する。図１は、塗装装置の全体
構造を表している。塗装ブース１は、被塗装物２を収容
可能な空間を備え、被塗装物２は、コンベア３などの搬
送手段で、塗装ブース１に搬送および搬出される。塗装
ブース１内で被塗装物２と対面する位置には、スプレー
ノズル４が設けられている。スプレーノズル４からは塗
料液が噴霧されて被塗装物２の表面に塗装される。スプ
レーノズル４は、ポンプ２７を備えた配管系を経て、塗
料槽１８に接続されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the overall structure of the coating apparatus. The coating booth 1 includes a space capable of accommodating the workpiece 2, and the workpiece 2 is transported to and transported from the coating booth 1 by transporting means such as a conveyor 3. A spray nozzle 4 is provided at a position facing the article 2 in the coating booth 1. The coating liquid is sprayed from the spray nozzle 4 and applied to the surface of the workpiece 2. The spray nozzle 4 is connected to the paint tank 18 via a piping system having a pump 27.
【００２６】被塗装物２のスプレーノズル４に対する背
面側には、ウォーターカーテン６が設けられている。ウ
ォーターカーテン６は、上端側に設けられた液供給口１
３か噴出された水などの溶媒が垂直な壁に沿って流下
し、この流下液面で塗料ミストを捕集して、塗料ミスト
を下方に洗い流すようになっている。ウォーターカーテ
ン６の下部には、貯液槽７が設けられており、ウォータ
ーカーテン６から流れ落ちた塗料ミストを含む溶媒は、
貯液槽７に溜まる。ウォーターカーテン６の下端は、貯
液槽７の液面からわずかに上の位置に配置されており、
ウォーターカーテン６と貯液槽７の液面との間を通過し
て、ウォーターカーテン６の裏側に設けられた排気ダク
ト１２に、気流が流れるようになっている。ウォーター
カーテン６の下端縁を、鋸歯状などの凹凸縁にしておけ
ば、下端縁の凹部分で制限された気流が、排気ダクト１
２に流れ出るようになり、塗料ミストの捕集が良好に行
える。A water curtain 6 is provided on the back side of the workpiece 2 with respect to the spray nozzle 4. The water curtain 6 includes a liquid supply port 1 provided on the upper end side.
Solvents such as water jetted out from the nozzle 3 flow down along the vertical wall, and paint mist is collected at the flowing liquid level, and the paint mist is washed down. A liquid storage tank 7 is provided below the water curtain 6, and the solvent containing the paint mist that has flowed down from the water curtain 6 is
The liquid accumulates in the liquid storage tank 7. The lower end of the water curtain 6 is located slightly above the liquid level of the liquid storage tank 7,
An airflow passes between the water curtain 6 and the liquid surface of the liquid storage tank 7 and flows to an exhaust duct 12 provided on the back side of the water curtain 6. If the lower edge of the water curtain 6 is formed as an uneven edge such as a sawtooth shape, the airflow restricted by the concave portion of the lower edge is generated by the exhaust duct 1.
As a result, the paint mist can be collected well.
【００２７】貯液槽７は、被塗装物２の配置場所から、
ウォーターカーテン６および排気ダクト１２の下方付近
にかけて設けられている。貯液槽７のうち、被塗装物２
の下方からスプレーノズル４のほうにかけて、浅い傾斜
床面７２が設けられている。傾斜床面７２の末端には、
床面給液ノズル１４が設けられている。床面給液ノズル
１４から傾斜床面７２および貯液槽７の液面に向かっ
て、膜状の液流が形成され、その液面で塗料ミストを捕
集できるようになっている。The liquid storage tank 7 is arranged from the place where the workpiece 2 is arranged.
The water curtain 6 and the exhaust duct 12 are provided near the lower part. The object 2 to be coated in the liquid storage tank 7
A shallow inclined floor surface 72 is provided from below to the spray nozzle 4. At the end of the inclined floor surface 72,
A floor surface liquid supply nozzle 14 is provided. A film-like liquid flow is formed from the floor surface supply nozzle 14 toward the inclined floor surface 72 and the liquid surface of the liquid storage tank 7, so that the paint mist can be collected on the liquid surface.
【００２８】排気ダクト１２には、上方に排気ファン１
１が装備され、排気ファン１１の下方には、排気フィル
タ１０が取り付けられている。排気ファン１１では、塗
装ブース１内に、０．３〜０．５m/sec 程度の風速の気
流が発生される。排気フィルタ１０の上面には、洗浄ノ
ズル１５が設けられており、排気フィルタ１０に捕集さ
れた塗料ミストを、洗浄ノズル１５から噴射した水など
の溶媒で、排気フィルタ１０の下方に洗い落として、貯
液槽７に回収させる。In the exhaust duct 12, the exhaust fan 1 is
1, and an exhaust filter 10 is attached below the exhaust fan 11. In the exhaust fan 11, an airflow having a wind speed of about 0.3 to 0.5 m / sec is generated in the painting booth 1. A cleaning nozzle 15 is provided on the upper surface of the exhaust filter 10, and the paint mist collected by the exhaust filter 10 is washed down below the exhaust filter 10 with a solvent such as water sprayed from the cleaning nozzle 15. The liquid is collected in the liquid storage tank 7.
【００２９】排気フィルタ１０の下方で、排気ダクト１
２には、複数の邪魔板９が互い違いに取り付けられてい
る。排気ダクト１２の下方から上方へと流れる気流が、
邪魔板９に衝突して、気流に含まれる塗料ミストが捕集
され、落下回収される。ウォーターカーテン６の下方か
ら、排気ダクト１２の下方にかけて、貯液槽７の液面下
近くに、渦流板８が設けられている。渦流板８は、ウォ
ーターカーテン６から排気ダクト１２側に向けて高くな
るように傾斜しており、上端が内側に湾曲している。ウ
ォーターカーテン６の下端と液面の間を通過した気流
は、渦流板８の傾斜および湾曲に沿って流れることによ
って、気流中の塗料ミストが捕集され、液面に落下す
る。Below the exhaust filter 10, the exhaust duct 1
A plurality of baffle plates 9 are alternately attached to 2. The airflow that flows upward from below the exhaust duct 12 is:
The paint mist contained in the airflow is collected by colliding with the baffle plate 9 and dropped and collected. A swirl plate 8 is provided near the liquid level of the liquid storage tank 7 from below the water curtain 6 to below the exhaust duct 12. The swirl plate 8 is inclined so as to be higher from the water curtain 6 toward the exhaust duct 12, and has an upper end curved inward. The airflow that has passed between the lower end of the water curtain 6 and the liquid surface flows along the inclination and curvature of the swirl plate 8, whereby paint mist in the airflow is collected and falls onto the liquid surface.
【００３０】貯液槽７の下端と、前記したウォーターカ
ーテン６への液供給口１３、および、床面給液ノズル１
４は、配管で連結されている。この配管の途中には、ポ
ンプ１６および切換バルブ２２が取り付けられている。
この配管を循環する溶媒に、ウォーターカーテン６や貯
液槽７の液面で塗料ミストが捕集されて溜まることにな
る。これらの配管が、捕集液循環配管系を構成する。The lower end of the liquid storage tank 7, the liquid supply port 13 to the water curtain 6, and the floor surface liquid supply nozzle 1
4 is connected by piping. A pump 16 and a switching valve 22 are mounted in the middle of the pipe.
In the solvent circulating in this pipe, paint mist is collected and accumulated on the liquid surface of the water curtain 6 and the liquid storage tank 7. These pipes constitute a collection liquid circulation pipe system.
【００３１】前記切換バルブ２２とポンプ１６の間の配
管が、切換バルブ２３を介して、回収液槽１７に連結さ
れている。回収液槽１７の容量は、貯液槽７に溜まった
塗料を含む溶媒の全量を貯えることのできる程度に設定
されている。回収液槽１７は、限外濾過装置１９につな
がっているとともに、切換バルブ２６を経て、前記塗料
槽１８にもつながっている。限外濾過装置１９として
は、例えば、０．０３〜０．３μ程度の孔径を有するス
パイラル型の装置で、入圧力が３kg/cm2、流量が５m3/H
r 、１モジュールの諸元を備えたものが使用される。限
外濾過装置１９には、回収液槽１７へ戻る配管と、濾液
槽２０へつながる配管を備えている。濾液槽２０は、ポ
ンプ２１および切換バルブ２５を経て、前記した排気フ
ィルタ１０の洗浄ノズル１５につながっている。濾液槽
２０から洗浄ノズル１５への配管は、切換バルブ２５の
手前で、前記した捕集液が循環する配管に連結されて、
この連結部分には、切換バルブ２４が取り付けられてい
る。したがって、捕集液を、洗浄ノズル１５に供給する
こと、あるいは、濾液槽２０に溜まった濾液をウォータ
ーカーテン６や床面給液ノズル１４に供給することも可
能になっている。The piping between the switching valve 22 and the pump 16 is connected to the recovery liquid tank 17 via the switching valve 23. The capacity of the recovery liquid tank 17 is set to such an extent that the entire amount of the solvent including the paint stored in the liquid storage tank 7 can be stored. The recovery liquid tank 17 is connected to the ultrafiltration device 19 and to the paint tank 18 via a switching valve 26. The ultrafiltration device 19 is, for example, a spiral type device having a pore diameter of about 0.03 to 0.3 μm, an input pressure of 3 kg / cm 2 and a flow rate of 5 m 3 / H.
r, one with the specifications of one module is used. The ultrafiltration device 19 includes a pipe returning to the recovery liquid tank 17 and a pipe connecting to the filtrate tank 20. The filtrate tank 20 is connected to the washing nozzle 15 of the exhaust filter 10 via a pump 21 and a switching valve 25. The pipe from the filtrate tank 20 to the washing nozzle 15 is connected to the pipe through which the collected liquid circulates before the switching valve 25,
A switching valve 24 is attached to this connection portion. Therefore, the collected liquid can be supplied to the washing nozzle 15, or the filtrate collected in the filtrate tank 20 can be supplied to the water curtain 6 and the floor surface supply nozzle 14.
【００３２】上記のような構造を備えた塗装装置の使用
について、塗装工程を段階的に分けて説明する。 〔準備段階〕塗装を開始する準備として、排気ファン１
１を作動させて、塗装ブース１内に、スプレーノズル４
側からウォーターカーテン６側を経て排気ダクト１２へ
と流れる気流を発生させておく。貯液槽７には、一定量
の水、あるいは、水に適宜の添加剤を含む溶媒を溜めて
おき、切換バルブ２４は閉じ、切換バルブ２２は開い
て、ポンプ１６を作動させる。溶媒は、ウォーターカー
テン６を流れ落ちたり、床面給液ノズル１４から貯液槽
７の液面に流れ込む。The use of the coating apparatus having the above-described structure will be described step by step in the coating process. [Preparation stage] In preparation for starting painting, exhaust fan 1
Activate the spray nozzle 4 in the painting booth 1
An airflow flowing from the side to the exhaust duct 12 via the water curtain 6 side is generated. A predetermined amount of water or a solvent containing an appropriate additive in water is stored in the liquid storage tank 7, the switching valve 24 is closed, the switching valve 22 is opened, and the pump 16 is operated. The solvent flows down the water curtain 6 or flows from the floor surface supply nozzle 14 to the liquid surface of the liquid storage tank 7.
【００３３】塗料槽１８には、目的の塗装色に調色さ
れ、水などの溶媒で適当な濃度に薄められた塗料液を収
容しておく。回収液槽１７は、塗装工程の最初のサイク
ルでは空の状態である。２回目以降のサイクルでは、貯
液槽７から捕集液が送り込まれる。濾液槽２０には、前
記貯液槽７と同様に、水などの溶媒が収容されている。
この濾液槽２０でも、塗装工程の最初のサイクルでは、
予め水などの溶媒を収容しておくが、２回目以降のサイ
クルでは、限外濾過装置１９で捕集液から分離された濾
液が収容されることになる。The coating tank 18 contains a coating liquid which is toned to a desired coating color and diluted to an appropriate concentration with a solvent such as water. The recovery liquid tank 17 is empty in the first cycle of the coating process. In the second and subsequent cycles, the collected liquid is sent from the liquid storage tank 7. The filtrate tank 20 contains a solvent such as water as in the case of the liquid storage tank 7.
Also in this filtrate tank 20, in the first cycle of the coating process,
A solvent such as water is stored in advance, but in the second and subsequent cycles, the filtrate separated from the collected liquid by the ultrafiltration device 19 is stored.
【００３４】〔塗装実行段階〕塗装ブース１内に被塗装
物２を搬入し、ポンプ２７を作動させて、スプレーノズ
ル４から塗料を噴霧する。塗料は、被塗装物２の表面に
付着して塗装が行われる。被塗装物２に付着しなかった
塗料ミストは、重力の作用で貯液槽７の液面に落下した
り、ウォーターカーテン６で捕集されて貯液槽７に回収
されたりする。排気ファン１１で発生した気流により、
塗料ミストは、被塗装物２の周辺に滞留せず、ウォータ
ーカーテン６側へと効率良く流れる。ウォーターカーテ
ン６と貯液槽７の液面の隙間から排気ダクト１２側へと
流れる気流に、塗料ミストが含まれていた場合には、渦
流板８や邪魔板９の作用で捕集されたり、排気フィルタ
１０で捕集されたりするので、排気ダクト１２の外部に
塗料ミストが漏れる心配はない。[Coating Execution Stage] The object 2 to be coated is carried into the coating booth 1, and the pump 27 is operated to spray the coating material from the spray nozzle 4. The paint is applied by adhering to the surface of the workpiece 2. The paint mist that has not adhered to the workpiece 2 falls on the liquid surface of the liquid storage tank 7 due to the action of gravity, or is collected by the water curtain 6 and collected in the liquid storage tank 7. Due to the airflow generated by the exhaust fan 11,
The paint mist does not stay around the workpiece 2 and flows efficiently toward the water curtain 6. When the paint mist is contained in the airflow flowing from the gap between the liquid level of the water curtain 6 and the liquid tank 7 to the exhaust duct 12 side, the paint mist is collected by the action of the vortex plate 8 and the baffle plate 9, Since it is collected by the exhaust filter 10, there is no fear that the paint mist leaks to the outside of the exhaust duct 12.
【００３５】貯液槽７に溜まる溶媒は、ウォーターカー
テン６などで塗料ミストを捕集して溶解させているの
で、塗装の進行に伴って、貯液槽７に集められた溶媒に
は、塗料の含有量が増えることになる。貯液槽７に集め
られた溶媒の塗料含有量が一定の限度を超えるまでは、
被塗装物２の搬入搬出を繰り返したりして、上記したよ
うな塗装作業を継続して行う。The solvent accumulated in the liquid storage tank 7 is collected and dissolved by the water curtain 6 or the like, so that the solvent collected in the liquid storage tank 7 contains Will increase. Until the paint content of the solvent collected in the storage tank 7 exceeds a certain limit,
The coating operation as described above is continuously performed by repeatedly loading and unloading the workpiece 2.
【００３６】〔洗浄段階〕貯液槽７の溶媒に含まれる塗
料の割合が一定の限度を超えると、一旦、塗装作業を止
めて、以下に説明する洗浄作業を行う。まず、排気ファ
ン１１は止められるか、排気速度を小さくされる。具体
的には、排気の線速度を０．２m/sec 以下に抑えてお
く。排気速度が大きいと、洗浄の際に供給された溶媒の
飛沫とともに塗料が外部に漏れる可能性がある。ウォー
ターカーテン６や床面給液ノズル１４への溶媒の供給も
止める。[Cleaning Step] When the ratio of the paint contained in the solvent in the liquid storage tank 7 exceeds a certain limit, the coating operation is temporarily stopped and the cleaning operation described below is performed. First, the exhaust fan 11 is stopped or the exhaust speed is reduced. Specifically, the linear velocity of the exhaust is suppressed to 0.2 m / sec or less. If the pumping speed is high, the paint may leak to the outside together with the splash of the solvent supplied at the time of cleaning. The supply of the solvent to the water curtain 6 and the floor surface liquid supply nozzle 14 is also stopped.
【００３７】切換バルブ２２を閉じ、切換バルブ２３を
開いて、貯液槽７に溜まった塗料を含む溶媒を全て、回
収液槽１７に送り込む。切換バルブ２５を開き、ポンプ
２１を作動させて、濾液槽２０から洗浄ノズル１５に洗
浄液となる溶媒を供給する。洗浄フィルタ１０に溜まっ
た塗料ミストは洗い落とされ、邪魔板９などに付着した
塗料ミストも洗い流されて、貯液槽７に溶媒が溜まる。
貯液槽７に溜まった溶媒は、次の塗装工程で、ウォータ
ーカーテン６などに循環供給される。貯液槽７に溜まっ
た溶媒の量が少なければ、外部から水などを追加供給し
てもよい。The switching valve 22 is closed, the switching valve 23 is opened, and all the solvent including the paint stored in the liquid storage tank 7 is sent to the recovery liquid tank 17. The switching valve 25 is opened, the pump 21 is operated, and a solvent serving as a cleaning liquid is supplied from the filtrate tank 20 to the cleaning nozzle 15. The paint mist accumulated in the washing filter 10 is washed away, the paint mist adhering to the baffle plate 9 and the like is also washed away, and the solvent is accumulated in the liquid storage tank 7.
The solvent accumulated in the liquid storage tank 7 is circulated and supplied to the water curtain 6 and the like in the next coating step. If the amount of the solvent stored in the liquid storage tank 7 is small, water or the like may be additionally supplied from the outside.
【００３８】〔濃縮分離段階〕回収液槽１７に溜まった
塗料を含む液を、限外濾過装置１９との間で循環させな
がら、この循環液から水などの溶媒成分を分離して、濾
液槽２０に回収する。回収液槽１７の液は、徐々に塗料
の濃度が高まる。回収液槽１７の液中の塗料濃度が、塗
装に利用可能な程度まで高くなった段階で、限外濾過装
置１９への循環を停止し、切換バルブ２６を開き、回収
液槽１７の塗料液を、塗料槽１８に送る。塗料槽１８で
は、回収液槽１７から供給された塗料液に、必要に応じ
て、外部から追加の塗料液を加えたり、調色を行ったり
して、次の塗装工程で使用する塗料液を用意する。回収
液槽１７は空になり、次の塗装工程に備える。濾液槽２
０に溜まった濾液の量が少なければ、水などの溶媒を追
加供給してもよい。[Concentration and Separation Step] While circulating the liquid containing the paint accumulated in the recovery liquid tank 17 with the ultrafiltration apparatus 19, the solvent component such as water is separated from the circulating liquid and the filtrate is separated. Collect at 20. The concentration of the paint in the liquid in the recovery liquid tank 17 gradually increases. When the paint concentration in the liquid in the recovery liquid tank 17 becomes high enough to be used for coating, the circulation to the ultrafiltration device 19 is stopped, the switching valve 26 is opened, and the coating liquid in the recovery liquid tank 17 is opened. Is sent to the paint tank 18. In the paint tank 18, if necessary, an additional paint liquid is added to the paint liquid supplied from the recovery liquid tank 17 or the color is adjusted, so that the paint liquid to be used in the next coating step is obtained. prepare. The recovery liquid tank 17 becomes empty and is ready for the next coating step. Filtrate tank 2
If the amount of the filtrate accumulated in 0 is small, a solvent such as water may be additionally supplied.
【００３９】この後は、前記した準備段階から塗装実行
段階、洗浄段階、濃縮分離段階を順次繰り返すことによ
って、被塗装物２に対する連続塗装が行われる。なお、
塗装ブース１内で被塗装物２に塗装を行うのと同時に、
回収液槽１７および限外濾過装置１９で、捕集液の濃縮
分離を行えば、作業の能率化が図れる。これは、塗装の
実行に必要な配管系と、濃縮分離に必要な配管系が、完
全に分離されているので、それぞれの工程を同時に行う
ことができるからである。Thereafter, the coating operation is continuously performed on the object 2 by sequentially repeating the above-described preparation stage, coating execution stage, washing stage, and concentration separation stage. In addition,
At the same time as painting the work 2 in the painting booth 1,
If the collected liquid is concentrated and separated in the recovery liquid tank 17 and the ultrafiltration device 19, the efficiency of the operation can be improved. This is because the piping system required for performing the coating and the piping system required for concentration and separation are completely separated, so that each step can be performed simultaneously.
【００４０】上記した塗装装置では、塗装色を変更する
際には、装置全体の配管系を、水などの溶媒で洗浄した
後、塗料槽１７に新たな色の塗料を供給してから、次の
塗装工程を開始することになる。第２図には、上記のよ
うな色替え作業の能率化を図った装置を示している。基
本的な装置の構造は、前記した第１図の実施例の場合と
同様でよいので、共通する部分の説明は省略して、相違
点を主に説明する。In the above-described coating apparatus, when changing the coating color, the piping system of the entire apparatus is washed with a solvent such as water, and then a new color paint is supplied to the paint tank 17 before the next change. Will start the painting process. FIG. 2 shows an apparatus for improving the efficiency of the color changing operation as described above. Since the basic structure of the device may be the same as that of the embodiment of FIG. 1, the description of the common parts will be omitted, and the differences will be mainly described.
【００４１】塗装ブース１部分の構造は、前記実施例と
同様であるが、前記した洗浄段階および濃縮分離段階を
関わる構造部分が、２組設けられている。すなわち、回
収液槽１７Ａ、限外濾過装置１９Ａ、濾液槽２０Ａ、塗
料槽１８Ａなど、添字Ａを付けた各構造部分からなる１
組の配管系と、回収液槽１７Ｂ、限外濾過装置１９Ｂ、
濾液槽２０Ｂ、塗料槽１８Ｂなど、添字Ｂを付けた各構
造部分からなる１組の配管系とが、塗装ブース１に対し
て並列的に設置されており、それぞれの配管系を、異な
る色の塗装に用いる。The structure of the coating booth 1 is the same as that of the above embodiment, except that two sets of structural parts related to the washing step and the concentration separation step are provided. In other words, each of the components having the subscript A, such as the recovery liquid tank 17A, the ultrafiltration device 19A, the filtrate tank 20A, the paint tank 18A, etc.
Set of piping system, recovery liquid tank 17B, ultrafiltration device 19B,
A set of piping systems each having a subscript B, such as a filtrate tank 20B and a paint tank 18B, is installed in parallel with the coating booth 1, and each piping system is provided with a different color. Used for painting.
【００４２】具体的には、例えば、塗装ブース１で最初
の色の塗装を行った後、貯液槽７から、片方の回収液槽
１７Ａに塗料を含む捕集液を送り込み、捕集液から塗料
を濃縮分離して塗料槽１８Ａに溜める。このとき、他方
の塗料槽１８Ｂには、別の色の塗料を収容しておけば、
この塗料槽１８Ｂから塗装ブース１のスプレーノズル４
に塗料を供給することによって、直ちに次の色の塗装が
開始できる。塗料槽１８Ｂからの塗料による塗装が終了
すれば、貯液槽７の捕集液は、回収液槽１７Ｂに送り込
む。More specifically, for example, after the first color coating is performed in the coating booth 1, a collection liquid containing a paint is sent from the liquid storage tank 7 to one of the recovery liquid tanks 17A, and the collected liquid is separated from the collected liquid. The paint is concentrated and separated and stored in the paint tank 18A. At this time, if another color paint is stored in the other paint tank 18B,
From the paint tank 18B, the spray nozzle 4 of the painting booth 1
By supplying the paint, the next color of paint can be started immediately. When the coating with the paint from the paint tank 18B is completed, the collected liquid in the liquid storage tank 7 is sent to the recovery liquid tank 17B.
【００４３】このように、複数の色毎に設置された配管
系を切り換えて使用すれば、塗装色の切り換えの度に、
限外濾過装置１９などの全ての配管系を洗浄したりする
手間が省ける。但し、この方法でも、塗装色を切り換え
たときに、塗装ブース１内に付着していたり、貯液槽７
の捕集液中に捕集された塗料には、前回用いた色の塗料
が含まれている場合がある。そこで、塗装色を厳密に設
定するには、塗装色を切り換えた後で、塗料の調色を行
うようにすればよい。As described above, by switching and using the piping system provided for each of a plurality of colors, every time the coating color is switched,
The labor for cleaning all piping systems such as the ultrafiltration device 19 can be omitted. However, even in this method, when the coating color is switched, it may adhere to the inside of the coating booth 1 or may be changed to the liquid storage tank 7.
In some cases, the paint collected in the collection liquid may contain the paint of the color used last time. Therefore, in order to strictly set the paint color, the paint color may be adjusted after switching the paint color.
【００４４】[0044]
【発明の効果】以上に述べた、この発明にかかる塗装方
法および装置は、塗装ブース内に放出された塗料ミスト
を捕集した捕集液から、塗料を濃縮分離して、塗装に利
用できる塗料液と、塗料ミストの捕集に利用できる濾液
すなわち溶媒とに分離回収して、繰り返し利用を図るの
で、塗料および溶媒を無駄なく利用できて、塗装コスト
を削減できる。しかも、塗料あるいは溶媒が外部環境に
放出されないので、環境汚染を確実に防止することがで
きる。As described above, the coating method and apparatus according to the present invention provide a coating material that can be concentrated and separated from a collected liquid that has collected a coating mist discharged into a coating booth and used for coating. Since the liquid and the filtrate, that is, the solvent, which can be used for collecting the paint mist, are separated and collected and are repeatedly used, the paint and the solvent can be used without waste, and the coating cost can be reduced. In addition, since the paint or the solvent is not released to the external environment, environmental pollution can be reliably prevented.
【００４５】上記のような捕集液からの塗料および溶媒
の回収作業を、塗装ブース内における作業とは完全に分
離して別々に行うことができるので、作業能率が高い。The work of recovering the paint and the solvent from the collected liquid as described above can be performed completely separately and separately from the work in the coating booth, so that the work efficiency is high.
【図１】 この発明の実施例を表す塗装装置の全体構造
図FIG. 1 is an overall structural diagram of a coating apparatus showing an embodiment of the present invention.
【図２】 別の実施例を表す塗装装置の全体構造図FIG. 2 is an overall structural view of a coating apparatus showing another embodiment.
１ 塗装ブース ２ 被塗装物 ４ スプレーノズル ６ ウォーターカーテン ７ 貯液槽 １０ 排気フィルタ １１ 排気ファン １２ 排気ダクト １５ 洗浄ノズル １７ 回収液槽 １８ 塗料槽 １９ 限外濾過装置 ２０ 濾液槽 DESCRIPTION OF SYMBOLS 1 Painting booth 2 Coating object 4 Spray nozzle 6 Water curtain 7 Liquid storage tank 10 Exhaust filter 11 Exhaust fan 12 Exhaust duct 15 Washing nozzle 17 Recovery liquid tank 18 Paint tank 19 Ultrafiltration device 20 Filtrate tank
フロントページの続き (56)参考文献 特開 平５−228422（ＪＰ，Ａ) 特開 昭63−294960（ＪＰ，Ａ) 特開 平４−200667（ＪＰ，Ａ) 特開 平５−104058（ＪＰ，Ａ) 実開 昭52−113867（ＪＰ，Ｕ) 特表 平６−507337（ＪＰ，Ａ) 特表 平９−506908（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) B05B 15/12 B05D 1/02 B05C 15/00Continuation of front page (56) References JP-A-5-228422 (JP, A) JP-A-63-294960 (JP, A) JP-A-4-200667 (JP, A) JP-A-5-104058 (JP, A) , A) Japanese Utility Model 52-113867 (JP, U) Table 6-507337 (JP, A) Table 9-506908 (JP, A) (58) Fields surveyed (Int. Cl. 6 , DB) Name) B05B 15/12 B05D 1/02 B05C 15/00
Claims (15)
液を噴霧して被塗装物に塗装を行い、被塗装物に塗装さ
れなかった噴霧塗料を塗料捕集手段で溶媒に捕集させ、
捕集された塗料を含む溶媒を貯液槽に集め、この捕集液
を前記塗料液捕集手段に循環供給するとともに、塗装ブ
ースからの排気中に含まれる塗料を排気フィルタで捕集
する塗装方法において、貯液槽に集められた捕集液を回
収液槽に送り、回収液槽に循環接続された濃縮分離手段
で、所定濃度の塗料液と濾液とに分離し、得られた塗料
液を噴霧塗装手段に供給し、同じく得られた濾液を排気
フィルタの洗浄手段に供給し、排気フィルタで捕集され
た塗料を前記濾液に溶解させて貯液槽に集めることを特
徴とする塗装方法。In a coating booth, a coating liquid is sprayed from a spray coating means to apply a paint to an object to be coated, and the spray paint not applied to the object to be coated is collected in a solvent by a paint collecting means,
The solvent containing the collected paint is collected in a storage tank, and the collected liquid is circulated and supplied to the paint liquid collecting means, and the paint contained in the exhaust gas from the coating booth is collected by an exhaust filter. In the method, the collected liquid collected in the liquid storage tank is sent to the collected liquid tank, and is separated into a predetermined concentration of the coating liquid and the filtrate by the concentration separation means circulated and connected to the collected liquid tank. Is supplied to a spray coating means, the obtained filtrate is supplied to a cleaning means of an exhaust filter, and the paint collected by the exhaust filter is dissolved in the filtrate and collected in a liquid storage tank. .
塗料であり、溶媒が水または水を主成分とする液体であ
る塗装方法。2. The method according to claim 1, wherein the paint is a water-soluble paint and the solvent is water or a liquid containing water as a main component.
を、排気フィルタの洗浄手段および塗料補集手段に供給
する塗装方法。3. The coating method according to claim 1, wherein the filtrate is supplied to a cleaning means of the exhaust filter and a paint collecting means.
霧塗装する噴霧塗装手段と、被塗装物に塗装されなかっ
た噴霧塗料を溶媒に捕集させる塗料液捕集手段と、捕集
された塗料を含む溶媒を集める貯液槽と、貯液槽の捕集
液を塗料液捕集手段に循環供給する捕集液循環配管系
と、塗装ブースからの排気中に含まれる塗料を捕集する
排気フィルタとを備えた塗装装置において、前記捕集液
循環配管系に切換自在に接続される濃縮分離配管系を備
え、この濃縮分離配管系は、貯液槽の捕集液を収容する
回収液槽と、回収液槽に循環接続された濃縮分離手段
と、濃縮分離手段で濃縮分離された塗料液を収容する塗
料槽と、塗料液が分離された濾液を収容する濾液槽とを
備え、塗料槽は前記噴霧塗装手段に接続され、濾液槽は
前記排気フィルタに備えた洗浄手段に接続され、この洗
浄手段から排出される洗浄液が前記貯液槽に集められる
ようになっていることを特徴とする塗装装置。4. A spray coating means for spray-coating a coating liquid on an object to be coated in a coating booth, a coating liquid collecting means for collecting a spray coating not applied to the object to be coated in a solvent, and a collecting means. A tank for collecting the solvent containing the paint, a collected liquid circulation piping system for circulating the collected liquid in the storage tank to the coating liquid collecting means, and a method for collecting the paint contained in the exhaust gas from the coating booth. In a coating apparatus having an exhaust filter for collecting, a concentration / separation piping system which is switchably connected to the collection liquid circulation piping system is provided, and the concentration / separation piping system accommodates the collected liquid in the storage tank. A recovery liquid tank, a concentration separation means circulatingly connected to the recovery liquid tank, a paint tank containing the coating liquid concentrated and separated by the concentration separation means, and a filtrate tank containing the filtrate from which the coating liquid has been separated are provided. , A paint tank is connected to the spray coating means, and a filtrate tank is provided in the exhaust filter. A washing liquid connected to the washing means, wherein the washing liquid discharged from the washing means is collected in the liquid storage tank.
フィルタの洗浄手段および塗料補集手段に接続されてい
る塗装装置。5. The coating apparatus according to claim 4, wherein the filtrate tank is connected to the exhaust filter cleaning means and the paint collection means.
分離配管系を複数組備え、各濃縮分離配管系が、選択的
に捕集液循環配管系に接続される塗装装置。6. The coating apparatus according to claim 4, further comprising a plurality of sets of concentration / separation piping systems, wherein each of the concentration / separation piping systems is selectively connected to a collection liquid circulation piping system.
いて、塗料液捕集手段として、液体を膜状に流下させ
て、この流下液面で噴霧塗料を捕集するウォーターカー
テンを備えている塗装装置。7. The apparatus according to claim 4, wherein the coating liquid collecting means includes a water curtain for causing the liquid to flow down in the form of a film and collecting the sprayed coating on the liquid level. Painting equipment.
ーテンが、水平方向の隙間を多数備えたものからなる塗
装装置。8. The coating apparatus according to claim 7, wherein the water curtain has a large number of horizontal gaps.
ーテンが、垂直方向の隙間を多数備えたものからなる塗
装装置。9. The coating apparatus according to claim 7, wherein the water curtain has a large number of vertical gaps.
おいて、塗料液捕集手段として、塗装ブース内の空間と
貯液槽内とを循環移動する無端状の塗料液捕集面を備え
ている塗装装置。10. The coating liquid collecting means according to claim 4, wherein the coating liquid collecting means includes an endless coating liquid collecting surface which circulates and moves between a space in the coating booth and a liquid storage tank. Equipped painting equipment.
集面に、表裏に連通する多数の通気孔を備えている塗装
装置。11. The coating apparatus according to claim 10, wherein the coating liquid collecting surface is provided with a large number of ventilation holes communicating with the front and back.
おいて、塗料液捕集手段として、塗料液捕集面と、この
塗料捕集面に溶媒を噴射して塗料液を溶媒に捕集させる
溶媒噴射手段を備えている塗装装置。12. The coating liquid collecting means according to claim 4, wherein the coating liquid collecting means comprises: a coating liquid collecting surface; and a solvent being sprayed on the coating liquid collecting surface to collect the coating liquid into the solvent. A coating apparatus having a solvent spraying means for collecting.
集面が、塗装ブース内の噴霧塗料を捕集する位置と、溶
媒噴射手段の設置位置とを循環移動する塗装装置。13. The coating apparatus according to claim 12, wherein the coating liquid collecting surface circulates and moves between a position where the spray liquid is collected in the coating booth and an installation position of the solvent injection means.
において、貯液槽に攪拌手段を備えている塗装装置。14. The coating apparatus according to claim 4, wherein the liquid storage tank is provided with a stirring means.
において、濃縮分離手段が限外濾過装置である塗装装
置。15. The coating device according to claim 4, wherein the concentration and separation means is an ultrafiltration device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4300161A JP2810829B2 (en) | 1992-11-10 | 1992-11-10 | Painting method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4300161A JP2810829B2 (en) | 1992-11-10 | 1992-11-10 | Painting method and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06142573A JPH06142573A (en) | 1994-05-24 |
| JP2810829B2 true JP2810829B2 (en) | 1998-10-15 |
Family
ID=17881486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4300161A Expired - Fee Related JP2810829B2 (en) | 1992-11-10 | 1992-11-10 | Painting method and equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2810829B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002102760A (en) * | 2000-09-29 | 2002-04-09 | Nippon Paint Co Ltd | Method for recovering water based coating material |
| JP5275752B2 (en) * | 2008-10-30 | 2013-08-28 | 秀機 拜郷 | Exhaust device and painting equipment |
| JP2012120935A (en) * | 2010-12-06 | 2012-06-28 | Uv Technica:Kk | Method and device for treating circulation water of coating booth |
| CN103265180A (en) * | 2013-05-29 | 2013-08-28 | 江苏双仪光学器材有限公司 | Protective film spraying workbench |
| CH712376A1 (en) * | 2016-04-19 | 2017-10-31 | Camag | Derivatization device and method. |
| CN107755152A (en) * | 2017-11-23 | 2018-03-06 | 中山市君禾机电设备有限公司 | A kind of spray room system with Powder Recovery structure |
-
1992
- 1992-11-10 JP JP4300161A patent/JP2810829B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06142573A (en) | 1994-05-24 |
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