JPH06170285A - Method and device for applying coating liquid containing aluminum and/or aluminum alloy powder - Google Patents
Method and device for applying coating liquid containing aluminum and/or aluminum alloy powderInfo
- Publication number
- JPH06170285A JPH06170285A JP4351966A JP35196692A JPH06170285A JP H06170285 A JPH06170285 A JP H06170285A JP 4351966 A JP4351966 A JP 4351966A JP 35196692 A JP35196692 A JP 35196692A JP H06170285 A JPH06170285 A JP H06170285A
- Authority
- JP
- Japan
- Prior art keywords
- coating liquid
- coating
- spray gun
- alloy powder
- aluminum alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Coating By Spraying Or Casting (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Nozzles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、比重が大きく、沈降
し易いアルミニウムおよび／またはアルミニウム合金粉
末（以下、単にアルミニウム合金粉末という。）を含ん
だ塗布液を塗布するのに好適な塗布方法および塗布装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating method suitable for coating a coating liquid containing aluminum and / or aluminum alloy powder (hereinafter, simply referred to as aluminum alloy powder) having a large specific gravity and easily settling. It relates to a coating device.
【０００２】[0002]
【従来の技術】従来、塗料、接着剤等の塗布液を板、
壁、部品等に塗布する手段として、スプレーガンを用い
た塗布装置が知られている。このスプレーガンを用いた
塗布装置では、スプレーガンに塗布液を供給すると共
に、空気（圧縮空気）を供給して、被塗布物に霧状にし
た塗布液を吹き付けるようにしている。スプレーガンの
ノズル径や霧状に噴出する塗布液の広がり角度等の調整
が可能で、塗布面の仕上りが良好である為、多くの分野
で採用されている。2. Description of the Related Art Conventionally, coating liquids such as paints and adhesives are applied to plates,
A coating device using a spray gun is known as a means for coating walls, parts, and the like. In a coating device using this spray gun, the coating liquid is supplied to the spray gun, and at the same time, air (compressed air) is supplied to spray the atomized coating liquid onto the object to be coated. It is used in many fields because it is possible to adjust the nozzle diameter of the spray gun and the spread angle of the coating liquid ejected in a mist state, and the finish of the coating surface is good.
【０００３】[0003]
【発明が解決しようとする課題】前記のようなスプレー
ガンを用いた塗布装置を使用して、アルミニウム合金粉
末を含んだ塗布液を塗布する場合、スプレーガン内や、
スプレーガンに塗布液を供給する管内等で、塗布液中で
比重の大きいアルミニウム合金粉末が沈降する為、スプ
レーガンから被塗布物へ向けて放出される塗布液の成分
が変化し、被塗布物上で均一な塗布面が得られない問題
点があった。When a coating solution containing an aluminum alloy powder is coated by using the coating apparatus using the spray gun as described above, in the spray gun,
Aluminum alloy powder, which has a large specific gravity in the coating solution, settles inside the pipe that supplies the coating solution to the spray gun, so that the components of the coating solution discharged from the spray gun toward the coating object change There is a problem that a uniform coated surface cannot be obtained.
【０００４】[0004]
【課題を解決する為の手段】この発明は前記のような問
題点に鑑みてなされたもので、比重の大きく沈降性であ
るアルミニウム合金粉末を含んだ塗布液が、均一に、か
つ連続的に塗布できる塗布方法および塗布装置を提供す
ることを目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a coating solution containing aluminum alloy powder having a large specific gravity and a sedimentation property can be uniformly and continuously formed. It is an object of the present invention to provide a coating method and a coating device that can be coated.
【０００５】斯る目的を達成するこの発明の塗布方法
は、アルミニウム合金粉末を含んだ塗布液をスプレーガ
ンで被塗布物に向けて噴霧塗布する方法であって、前記
塗布液をスプレーガンに循環供給し、かつスプレーガン
の内圧を一定に保つようにすることを特徴としている。The coating method of the present invention which achieves the above object is a method of spraying a coating liquid containing aluminum alloy powder toward an object to be coated with a spray gun, and circulating the coating liquid through the spray gun. It is characterized by supplying and keeping the internal pressure of the spray gun constant.
【０００６】また、この発明の塗布装置は、被塗布物の
移送路に向けて、スプレーガンが設置してあり、該スプ
レーガンに、空気供給装置と、塗布液循環装置が接続し
てあることを特徴としている。Further, in the coating apparatus of the present invention, a spray gun is installed toward the transfer path of the object to be coated, and the air supply apparatus and the coating liquid circulating apparatus are connected to the spray gun. Is characterized by.
【０００７】前記塗布液循環装置は、ホッパー、ポンプ
および循環パイプで塗布液循環系が構成してあり、スプ
レーガンに接続された塗布液供給管端が、前記塗布液循
環系のポンプ吐出側に接続され、スプレーガンに接続さ
れた塗布液排出管が圧力調整弁を介して、前記塗布液循
環系のホッパーに開口させた塗布液循環装置とすること
ができる。In the coating liquid circulating device, a coating liquid circulating system is composed of a hopper, a pump and a circulating pipe, and a coating liquid supplying pipe end connected to a spray gun is located at a pump discharge side of the coating liquid circulating system. A coating solution circulating device can be provided in which a coating solution discharge pipe connected to and connected to a spray gun is opened to the hopper of the coating solution circulating system via a pressure adjusting valve.
【０００８】[0008]
【作用】この発明によれば、アルミニウム合金粉末を含
んだ塗布液を循環させることによって、スプレーガン内
や塗布液の供給管内で塗布液が滞留しないようにでき、
かつ撹拌作用を与えるので、塗布液中で比重の大きいア
ルミニウム合金粉末が沈降するのを防止する。この結
果、スプレーガンで吹き付ける塗布液の成分を一定に
し、均一な塗布面を被塗布物面上に形成することが可能
となる。According to the present invention, by circulating the coating liquid containing the aluminum alloy powder, it is possible to prevent the coating liquid from staying in the spray gun or the supply pipe of the coating liquid,
In addition, since it has a stirring action, it prevents the aluminum alloy powder having a large specific gravity from settling in the coating liquid. As a result, the components of the coating liquid sprayed by the spray gun can be made constant, and a uniform coating surface can be formed on the surface of the object to be coated.
【０００９】[0009]
【実施例】以下、この発明の実施例を図を参照して説明
する。図１は、片面塗布の場合の実施例で、被塗布物１
の移送路２がコンベア３とコンベア４で構成してあり、
被塗布物１が矢示５の方向に移送されるようになってい
る。コンベア３の始端部（図中左端）に手動又は、自動
供給機（図示しない）により被塗布物１を、１個ずつ供
給すると、コンベア３からコンベア４へ順次定速で移送
される。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment in the case of single-sided coating.
The transfer path 2 of is composed of the conveyor 3 and the conveyor 4,
The article to be coated 1 is transferred in the direction of arrow 5. When the object to be coated 1 is supplied to the starting end portion (left end in the drawing) of the conveyor 3 manually or by an automatic feeder (not shown), the objects to be coated 1 are sequentially transferred from the conveyor 3 to the conveyor 4 at a constant speed.
【００１０】前記コンベア３とコンベア４の隣接間隙部
６は、被塗布物１の受渡しに支障のない距離としてあ
り、該隣接間隙部６の上側にスプレーガン７が、被塗布
物１の移送路に向けて設置してある。The adjacent gap portion 6 between the conveyor 3 and the conveyor 4 has a distance that does not hinder the delivery of the article 1 to be coated, and the spray gun 7 is provided above the adjacent gap portion 6 and the transfer path of the article 1 to be coated. It is installed toward.
【００１１】スプレーガン７には、コンプレッサ８の空
気供給管９が接続されていると共に、ホッパー１０、ポ
ンプ１１および循環パイプ１２で構成した塗布液循環系
１３が、塗布液供給管１４および塗布液排出管１５を介
して接続されている。An air supply pipe 9 of a compressor 8 is connected to the spray gun 7, and a coating liquid circulation system 13 composed of a hopper 10, a pump 11 and a circulation pipe 12 is connected to the coating liquid supply pipe 14 and the coating liquid. It is connected through the discharge pipe 15.
【００１２】図中、１６は、コンベア４に設置した乾燥
装置で、実施例ではヒータ１７とファン１８を設けたも
のとした。In the figure, 16 is a drying device installed on the conveyor 4, and in the embodiment, a heater 17 and a fan 18 are provided.
【００１３】図２は、前記スプレーガン７および塗布液
循環系１３を示した図で、ホッパー１０は、底部１０ａ
を漏斗状として、塗布液の滞留箇所が形成されないよう
にしてある。スプレーガン７の内部は図２(b) に示した
ように、空液混合室２０が形成してあり、空液混合室２
０の上部に開口した流路２１に塗布液供給管１４が接続
してあり、該塗布液供給管１４の端部１４ａは、前記塗
布液循環系１３を構成したポンプ１１の吐出側に接続し
てある。また、空液混合室２０の下部に開口した流路２
２に、塗布液排出管１５が接続してある。塗布液排出管
１５は、その途中に、図２(c) に示したような圧力調整
弁２３を介設し、端部１５ａは、塗布液循環系１３を構
成したホッパー１０に開口させてある。FIG. 2 is a view showing the spray gun 7 and the coating liquid circulating system 13, in which the hopper 10 has a bottom portion 10a.
Is formed into a funnel shape so that the area where the coating liquid stays is not formed. As shown in FIG. 2 (b), the inside of the spray gun 7 has an empty liquid mixing chamber 20 formed therein.
The coating liquid supply pipe 14 is connected to the flow path 21 which is open at the upper part of 0, and the end portion 14a of the coating liquid supply pipe 14 is connected to the discharge side of the pump 11 which constitutes the coating liquid circulation system 13. There is. In addition, the flow path 2 opened at the bottom of the air-liquid mixing chamber 20.
The coating liquid discharge pipe 15 is connected to the column 2. The coating liquid discharge pipe 15 is provided with a pressure adjusting valve 23 as shown in FIG. 2 (c) in the middle thereof, and the end portion 15a is opened to the hopper 10 constituting the coating liquid circulation system 13. .
【００１４】上記実施例において、被塗布物１に塗布液
を塗布するには、コンベア３、４を介して被塗布物１を
１個ずつ移送すると共に、コンプレッサ８、ポンプ１１
を駆動して、スプレーガン７から塗布液を移送されてい
る被塗布物１へ吹き付けるようにする。In the above embodiment, in order to apply the coating liquid to the article to be coated 1, the articles to be coated 1 are transferred one by one through the conveyors 3 and 4, and the compressor 8 and the pump 11 are also provided.
To spray the coating liquid from the spray gun 7 onto the object to be coated 1 being transferred.
【００１５】塗布液２４は、塗布液循環系１３において
常時、矢示２５の如く循環し、また、塗布液循環系１３
とスプレーガン７の間で、矢示２６の如く常時循環する
ので、塗布液２４は常時撹拌されて、比重の大きいアル
ミニウム合金粉末が沈降することが無く、塗布液２４を
構成した成分の比率を、どの場所においても均一に保つ
ことができる。The coating liquid 24 constantly circulates in the coating liquid circulating system 13 as indicated by an arrow 25, and the coating liquid circulating system 13
Since it constantly circulates between the spray gun 7 and the spray gun 7 as shown by the arrow 26, the coating liquid 24 is constantly stirred and the aluminum alloy powder having a large specific gravity does not settle, and the ratio of the components constituting the coating liquid 24 is kept constant. , Can be kept uniform in any place.
【００１６】スプレーガン７のレバー２７を操作する
と、ノズル２８から塗布液２４が空気と混合しながら被
塗布物１に向って吹き出し、被塗布物１に常時均一な組
成の塗布液が塗布される。圧力調整弁２３は、図２(c)
に示したように、弁座２９にこま型の弁体３０を設置し
た構造で、弁体３０に作用する圧力に応じて、弁の開度
が変化するようになっている。塗布液２４を吹き出して
いる際は、弁体３０に作用する圧力が低下するので、開
度が小さくなり、塗布液排出管１５を流れる塗布液の流
量が少なくなる結果、空液混合室２０の圧力低下を防い
で、常に略一定の内圧を維持して、ノズル２８から吹き
出される塗布液の量を一定にすることができる。When the lever 27 of the spray gun 7 is operated, the coating liquid 24 is blown from the nozzle 28 toward the object 1 to be mixed while mixing with air, and the object 1 is always coated with the coating liquid having a uniform composition. . The pressure regulating valve 23 is shown in FIG.
As shown in FIG. 5, the valve-shaped valve body 30 is installed on the valve seat 29, and the opening degree of the valve is changed according to the pressure acting on the valve body 30. When the coating liquid 24 is being blown, the pressure acting on the valve body 30 is reduced, so that the opening degree is reduced and the flow rate of the coating liquid flowing through the coating liquid discharge pipe 15 is reduced. It is possible to prevent a pressure drop and maintain a substantially constant internal pressure so that the amount of the coating liquid blown out from the nozzle 28 becomes constant.
【００１７】塗布液として、比重２．７のアルミニウム
合金粉末とバインダーを、溶剤にアルコールを使用して
粘度２０cpに調合して、塗布実験を行なった。An aluminum alloy powder having a specific gravity of 2.7 and a binder were prepared as a coating solution and alcohol was used as a solvent to prepare a solution having a viscosity of 20 cp, and a coating experiment was conducted.
【００１８】被塗布物は金属薄板として移送速度１０ｍ
／min で移送し、５０cm離れた距離にスプレーガン７を
配置し、吹き出しの角度を５０度として、連続３時間の
塗布を行なった。The object to be coated is a thin metal plate and the transfer speed is 10 m.
/ Min, the spray gun 7 was placed at a distance of 50 cm, and the spray angle was 50 degrees, and coating was continuously performed for 3 hours.
【００１９】塗布の間、ノズル２８の目づまりは１回も
発生しなかった。また、塗布液中のアルミニウム合金粉
末の沈降も認められなかった。金属薄板には均一な塗布
膜を安定に形成することができた。No clogging of the nozzle 28 occurred during the application. Further, no precipitation of aluminum alloy powder in the coating liquid was observed. A uniform coating film could be stably formed on the thin metal plate.
【００２０】同じ塗布液で、通常のスプレーガンを用い
た実験では、塗布液タンク内でアルミニウム合金粉末の
沈降が認められ、金属薄板上の塗布膜には、始めと終り
で濃淡の差があった。また、スプレーガンのノズル部分
には、度々、目づまりを生じ、塗布作業の中断を余儀な
くされた。In an experiment using the same coating solution and a normal spray gun, precipitation of aluminum alloy powder was observed in the coating solution tank, and the coating film on the thin metal plate had a difference in shade between the beginning and the end. It was In addition, the nozzle portion of the spray gun was often clogged and forced to interrupt the coating operation.
【００２１】塗布液の粘度は前記２０cpに限定されな
い。１０〜５０cp、好ましくは１５〜３０cp程度に調整
するのが望ましい。このような粘度に調整した塗布液
は、塗布液循環系１３で５〜４０ l／min 、好ましくは
１０〜２０ l／min で循環することによって、比重２．
６〜３．０程度のアルミニウム合金粉末の沈降を防止す
ることができた。The viscosity of the coating liquid is not limited to the above 20 cp. It is desirable to adjust to about 10 to 50 cp, preferably about 15 to 30 cp. The specific gravity of the coating liquid adjusted to have such a viscosity is 2.40 l / min, preferably 10 to 20 l / min in the coating liquid circulating system 13 so that the specific gravity is 2.
It was possible to prevent the precipitation of the aluminum alloy powder of about 6 to 3.0.
【００２２】スプレーガン７の空液混合室２０の内圧
は、コンプレッサー８から供給される空気の圧力を６Kg
／cm2 とした場合、０．１〜１．０Kg／cm2 、好ましく
は０．１〜０．５Kg／cm2 とすることによって、吹き出
される塗布液の量を安定させることができた。The internal pressure of the air-liquid mixing chamber 20 of the spray gun 7 is 6 kg of the air pressure supplied from the compressor 8.
If a / cm 2, 0.1~1.0Kg / cm 2 , preferably by a 0.1~0.5Kg / cm 2, the amount of the coating solution blown could be stabilized.
【００２３】以上、実施例について説明したが、スプレ
ーガンを用いた塗布では、塗布液中の溶剤が、スプレー
ガンのノズルから被塗布物へ移行する過程で蒸発するの
で、塗布膜は非常に短い時間で乾燥し、液垂れが無い。
従って、スプレーガンを被塗布物の両面に夫々対向設置
し、両面の同時塗布が可能である。この場合、塗布液循
環系は１台として、ポンプ１１の吐出側に２台のスプレ
ーガンに対する、塗布液供給管１４を接続するようにす
ることができる。Although the embodiments have been described above, in coating using a spray gun, the solvent in the coating liquid evaporates in the process of moving from the nozzle of the spray gun to the object to be coated, so that the coating film is very short. Drys in no time, no dripping.
Therefore, the spray guns can be installed on both sides of the object to be coated so as to face each other, and simultaneous coating of both sides is possible. In this case, the coating liquid circulating system may be one, and the coating liquid supply pipe 14 may be connected to the two spray guns on the discharge side of the pump 11.
【００２４】両面塗布は、コンベアで構成される移送路
内に、反転装置を介設し、反転装置の前後に、夫々スプ
レーガンを設置して、表裏を順次塗布するようにしても
良い。For double-sided coating, a reversing device may be provided in a transfer path constituted by a conveyor, and spray guns may be installed in front of and behind the reversing device to sequentially coat the front and back sides.
【００２５】[0025]
【発明の効果】以上に説明したように、この発明によれ
ば、アルミニウム合金粉末を含んだ塗布液を常時循環さ
せて、塗布液中に含まれる、比重の大きいアルミニウム
合金粉末が沈降しないようにしたので、均一な塗布膜を
連続的に形成できる効果がある。As described above, according to the present invention, the coating solution containing the aluminum alloy powder is constantly circulated so that the aluminum alloy powder having a large specific gravity contained in the coating solution does not settle. Therefore, there is an effect that a uniform coating film can be continuously formed.
【図１】この発明の実施例の系統図である。FIG. 1 is a system diagram of an embodiment of the present invention.
【図２】同じく実施例の要部を示す図で、(a) は塗布液
循環装置の図、(b) はスプレーガンの一部断面図、(c)
は圧力調整弁の断面図である。2A and 2B are views showing the main part of the embodiment, where FIG. 2A is a diagram of a coating liquid circulating device, FIG. 2B is a partial sectional view of a spray gun, and FIG.
FIG. 4 is a cross-sectional view of a pressure control valve.
１ 被塗布物 ２ 移送路 ３、４ コンベア ７ スプレーガン ８ コンプレッサー ９ 空気供給管 １０ ホッパー １１ ポンプ １２ 循環パイプ １３ 塗布液循環系 １４ 塗布液供給管 １５ 塗布液排出管 １６ 乾燥装置 ２０ 空液混合室 ２３ 圧力調整弁 ２４ 塗布液 ２８ ノズル ２９ 弁座 ３０ 弁体 DESCRIPTION OF SYMBOLS 1 Coating object 2 Transfer path 3, 4 Conveyor 7 Spray gun 8 Compressor 9 Air supply pipe 10 Hopper 11 Pump 12 Circulation pipe 13 Coating liquid circulation system 14 Coating liquid supply pipe 15 Coating liquid discharge pipe 16 Drying device 20 Empty liquid mixing chamber 23 Pressure Control Valve 24 Coating Liquid 28 Nozzle 29 Valve Seat 30 Valve Body
Claims (3)
ム合金粉末を含んだ塗布液をスプレーガンで被塗布物に
向けて噴霧塗布する方法であって、前記塗布液をスプレ
ーガンに循環供給し、かつスプレーガンの内圧を一定に
保つようにすることを特徴とするアルミニウムおよび／
またはアルミニウム合金粉末を含んだ塗布液の塗布方
法。1. A method of spray-coating a coating liquid containing aluminum and / or aluminum alloy powder onto an object to be coated with a spray gun, wherein the coating liquid is circulated and supplied to the spray gun and Aluminum and // characterized by keeping the internal pressure constant
Alternatively, a method of applying a coating liquid containing aluminum alloy powder.
ンが設置してあり、該スプレーガンに、空気供給装置
と、塗布液循環装置が接続してあることを特徴としたア
ルミニウムおよび／またはアルミニウム合金粉末を含ん
だ塗布液の塗布装置。2. A spray gun is installed toward a transfer path of an object to be coated, and an air supply device and a coating liquid circulation device are connected to the spray gun. Alternatively, a coating liquid coating device containing aluminum alloy powder.
布液循環系が構成してあり、スプレーガンに接続された
塗布液供給管端が、前記塗布液循環系のポンプ吐出側に
接続され、スプレーガンに接続された塗布液排出管が圧
力調整弁を介して、前記塗布液循環系のホッパーに開口
させて、塗布液循環装置が構成してある請求項２記載の
アルミニウムおよび／またはアルミニウム合金粉末を含
んだ塗布液の塗布装置。3. A spray gun comprising a hopper, a pump and a circulation pipe forming a coating solution circulation system, and a coating solution supply pipe end connected to a spray gun is connected to a pump discharge side of the coating solution circulation system. The aluminum and / or aluminum alloy powder according to claim 2, wherein a coating liquid discharge pipe connected to is opened to the hopper of the coating liquid circulating system via a pressure adjusting valve to constitute a coating liquid circulating device. Coating device for coating liquid containing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35196692A JP3479721B2 (en) | 1992-12-09 | 1992-12-09 | Method and apparatus for applying coating liquid containing aluminum and / or aluminum alloy powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35196692A JP3479721B2 (en) | 1992-12-09 | 1992-12-09 | Method and apparatus for applying coating liquid containing aluminum and / or aluminum alloy powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06170285A true JPH06170285A (en) | 1994-06-21 |
| JP3479721B2 JP3479721B2 (en) | 2003-12-15 |
Family
ID=18420853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35196692A Expired - Fee Related JP3479721B2 (en) | 1992-12-09 | 1992-12-09 | Method and apparatus for applying coating liquid containing aluminum and / or aluminum alloy powder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3479721B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009255079A (en) * | 2008-03-28 | 2009-11-05 | Ihi Corp | Injection amount control method for coating apparatus and apparatus |
-
1992
- 1992-12-09 JP JP35196692A patent/JP3479721B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009255079A (en) * | 2008-03-28 | 2009-11-05 | Ihi Corp | Injection amount control method for coating apparatus and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3479721B2 (en) | 2003-12-15 |
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