JP2003033699A - Vacuum coating method and apparatus - Google Patents
Vacuum coating method and apparatusInfo
- Publication number
- JP2003033699A JP2003033699A JP2001225885A JP2001225885A JP2003033699A JP 2003033699 A JP2003033699 A JP 2003033699A JP 2001225885 A JP2001225885 A JP 2001225885A JP 2001225885 A JP2001225885 A JP 2001225885A JP 2003033699 A JP2003033699 A JP 2003033699A
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- Prior art keywords
- coating
- vacuum
- paint
- coated
- powder
- 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.)
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- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Spray Control Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、環境に優しい粉体塗料
又は水性塗料を用いて行う塗装に関するものであり、特
に上下水排水管、管継ぎ手、ヘッダーなど複数の枝管を
有する被塗物の内外面塗装に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an environment-friendly powder coating or a water-based coating, and more particularly to an article to be coated having a plurality of branch pipes such as drainage pipes, pipe joints and headers. It is related to the inner and outer surface coating.
【０００２】[0002]
【従来の技術】特開平7-328494「粉体塗料の静電塗装装
置」は、図１に示すごとく真空下での静電粉体塗装塗装
に関する技術を提案している。すなわち、大気圧下に比
べ真空下では空気抵抗が小さくなるために帯電粒子が被
塗物表面に静電気力によって付着する塗着効率が１００
％近くまで改善するとしている。2. Description of the Related Art Japanese Unexamined Patent Publication No. 7-328494 "Electrostatic Coating Device for Powder Coating" proposes a technique for electrostatic powder coating coating under vacuum as shown in FIG. That is, since the air resistance under vacuum is smaller than that under atmospheric pressure, the coating efficiency with which the charged particles adhere to the surface of the article by the electrostatic force is 100.
It is said that it will be improved to nearly%.
【０００３】本発明と同種の塗膜形成からなる溶融層の
粘着力による真空粉体塗装技術としては、特公昭49-870
5「中空体の内側を被覆する方法及び装置」、特公昭49-
39492「単一口部のみを有する容器内面の樹脂被覆方
法」、及び特公昭51-577「複数口部を有する物体内面の
樹脂被覆方法」に開示され、既に公知となった技術であ
る。これら方法は、図２（特公昭51-577に記載の装置
図）に示すように、プロバック法として知られ、鋼管・
鋼管継手、パイプの内面塗装に適用されている。塗料と
してはポリエチレン、ポリアミド、エポキシなどが用い
られてきた。また、同方法による塗装及び塗膜は次の特
徴があることが知られている。
（１） 真空吸引後大気圧に戻すので塗膜の密着がよ
い。
（２） 異径管等の内面を塗装するのに適している。
（３） 全体がクローズドタイプなので作業環境が良好
である。
（４） 高速加工のため量産化が容易である。
しかしながら、このプロバック技術を鋼管・鋼管継手、
パイプ等の内外面の塗装に適用された例はない。As a vacuum powder coating technique using the adhesive force of a molten layer formed by the same kind of coating film formation as in the present invention, Japanese Patent Publication No. Sho 49-870.
5 "Method and device for coating the inside of a hollow body", Japanese Patent Publication No. 49-
39492 "Method for coating resin on inner surface of container having only a single opening" and JP-B-51-577 "Method for coating resin on inner surface of an object having a plurality of openings" are known techniques. These methods are known as the Provac method as shown in FIG. 2 (apparatus diagram described in Japanese Patent Publication No. 51-577).
It is applied to the inner coating of steel pipe joints and pipes. Polyethylene, polyamide, epoxy, etc. have been used as the paint. Further, it is known that the coating and coating film produced by the same method have the following characteristics. (1) Since the atmospheric pressure is restored after vacuum suction, the adhesion of the coating film is good. (2) Suitable for coating the inner surface of different diameter pipes. (3) The work environment is good because the whole is a closed type. (4) Mass production is easy because of high-speed processing. However, this Provac technology is applied to steel pipes and steel pipe joints,
There is no example applied to painting the inside and outside surfaces of pipes.
【０００４】真空を利用した塗装方法に関する他の提案
例として、特開平6-206042及び特開平6-206043がある。
前者は、真空室内で液体塗料を塗装する方法であり、後
者は、粉体塗装に関するものである。後者の特徴とする
ところは、大気圧下で塗装後、焼付け工程の前段階とし
て真空工程を組み込み、鋳物製品等の粗面状あるいはポ
ーラス状の表面に残存する気泡を真空脱法し、その後の
焼付け工程において好ましくないピンホールの形成を抑
制することにある。前者の場合、真空下で被塗物を塗料
中に半浸漬状態で回転させながら塗膜を形成する方法で
あり、塗装装置が複雑で、塗料液溜りができやすく塗膜
の平滑性の点で課題が残る。Other proposed examples of a coating method using a vacuum include Japanese Patent Laid-Open Nos. 6-206042 and 6-206043.
The former is a method of applying liquid paint in a vacuum chamber, and the latter is related to powder coating. The feature of the latter is that after painting under atmospheric pressure, a vacuum process is incorporated as a pre-stage of the baking process, the bubbles remaining on the rough surface or porous surface of the casting product etc. are vacuum-desorbed, and then the baking is performed. It is to suppress the formation of undesired pinholes in the process. In the case of the former, it is a method of forming a coating film while rotating the coating object in a paint in a semi-immersed state under vacuum. Challenges remain.
【０００５】また、特開平2000-167473「粉体付着方
法、高周波粉体塗装製品、粉体塗装装置、高周波表面処
理装置、及び内燃機関用マニホールド」は、真空吸引に
より、製品のピンホールに粉体を付着させるステップ
と、静電塗装により前記製品の全体に粉体を付着させる
ステップと、前記製品に高周波加熱加熱を施し前記粉体
を溶着させるステップを備えた粉体付着方法を提案して
いる。本提案は、プロセスが複雑で本発明の簡潔さに比
べると産業上の利用価値が低いといえる。In Japanese Patent Laid-Open No. 2000-167473, "Powder deposition method, high-frequency powder coating product, powder coating device, high-frequency surface treatment device, and manifold for internal-combustion engine", powder is applied to a pinhole of the product by vacuum suction. A powder adhesion method is proposed, which includes a step of attaching a body, a step of attaching powder to the entire product by electrostatic coating, and a step of applying high-frequency heating and heating to the product to weld the powder. There is. It can be said that the present proposal has low industrial utility value as compared with the simplicity of the present invention due to the complicated process.
【０００６】上述したように、真空を利用した塗装方法
に関する種々の技術は周知であるが、管状被塗物の内外
面表面を塗装する方法については何らの技術的記述がな
されていない。As described above, various techniques relating to the coating method utilizing vacuum are well known, but no technical description is made on the method of coating the inner and outer surface of the tubular article.
【０００７】ところで、真空の利用には関係しないが、
特開平10-337515「粉体塗装方法及び粉体塗装装置」
は、弁箱と呼ばれる排水管器具を粉体流動浸漬槽に浸漬
することにより内外面表面を同時に塗装をする方法に関
するものである。ここでいう弁箱は、本特許が対象とす
る被塗物、例えば集合管に比べ小さく、形状も単純なも
のであるが管軸に対してＴ字型に開口部があり粉流体の
流れに工夫が要することから、浸漬槽内で弁箱を回転さ
せる新規な機構を考案し提案している。浸漬槽内で塗布
する方法は、被塗物を回転させる機構を必要とするなど
本発明の真空塗装方法に比べ複雑で、品質上重要なピン
ホールの発生抑制の点からも劣ることは明らかで、鋳物
製品のように表面に凹凸があり気泡の発生の可能性のあ
る被塗物への適用は減圧下を使用しない方法では困難で
ある。By the way, although not related to the use of vacuum,
JP-A-10-337515 "Powder coating method and powder coating apparatus"
Relates to a method of simultaneously coating the inner and outer surfaces by immersing a drain pipe device called a valve box in a powder fluidized immersion tank. The valve box here is smaller than the object to be coated in this patent, for example, a collecting pipe, and has a simple shape, but it has a T-shaped opening with respect to the pipe axis and has a flow of powder fluid. Since it requires some innovation, we have devised and proposed a new mechanism for rotating the valve box in the immersion tank. The method of applying in the dipping tank is more complicated than the vacuum coating method of the present invention such as requiring a mechanism for rotating the object to be coated, and it is clear that it is inferior in terms of suppressing the generation of pinholes which are important for quality. However, it is difficult to apply it to an object to be coated, such as a casting product, which has irregularities on the surface and may cause bubbles, by a method that does not use reduced pressure.
【０００８】[0008]
【発明が解決しようとする課題】管状の被塗物の内外面
表面に塗装を可能とする真空塗装方法を提供することで
ある。内外面の塗装に当って、塗膜の平滑性を確保する
ために、必要に応じ、塗料供給口を増やすこと、複数の
位置で外気又は不活性ガスを導入し粉体の流動抵抗を制
御すること、旋回流動性を付加すること、また、予熱時
の熱で真空塗装後の塗膜の硬化が達成でき、改めて焼き
付け工程を省略できる塗料の実用性能を確認することが
課題である。SUMMARY OF THE INVENTION An object of the present invention is to provide a vacuum coating method capable of coating the inner and outer surfaces of a tubular article to be coated. In order to secure the smoothness of the coating film when coating the inner and outer surfaces, increase the paint supply port as necessary and control the flow resistance of the powder by introducing outside air or inert gas at multiple positions. Therefore, it is important to confirm the practical performance of the coating material in which the swirling fluidity is added, the curing of the coating film after vacuum coating can be achieved by the heat at the time of preheating, and the baking process can be omitted again.
【０００９】[0009]
【課題を解決するための手段】上記諸点に鑑み、請求項
１記載の発明は、予熱後の被塗物を真空槽の底辺の架台
（上下２枚のリング板を４本の円柱で支える空隙を有す
る構造）に設置。架台下の排気管及び塗料供給管からな
る２重管の排気管を用い、予め、槽内を減圧後、遮断弁
を開口し塗料供給口から塗料を吸引する。最初、塗料は
被塗物内面に塗膜を形成後、被塗部の上部及び枝管部な
ど開口部から流出する。流出した塗料は、被塗物外面に
塗膜を形成しながら架台の空隙部から排気管を経由して
真空槽内から排出される流れの過程で被塗物の内外面を
塗装することを特徴とする装置を提供することにある。In view of the above points, in the invention according to claim 1, the preheated object is mounted on the base of the vacuum chamber (a space in which two upper and lower ring plates are supported by four cylinders). Structure). Using a double-pipe exhaust pipe consisting of an exhaust pipe under the gantry and a paint supply pipe, after decompressing the inside of the tank in advance, the shutoff valve is opened and the paint is sucked from the paint supply port. Initially, the coating material forms a coating film on the inner surface of the article to be coated, and then flows out from the upper portion of the article to be coated and the opening such as the branch pipe portion. The spilled paint is characterized in that it coats the inner and outer surfaces of the object to be coated in the process of being discharged from the vacuum chamber through the exhaust pipe from the cavity of the frame while forming a coating film on the outer surface of the object. It is to provide the device.
【００１０】請求項２に記載の発明は、請求項１記載の
装置を用い、予め予熱した被塗物を真空槽内に輸送、架
台上に設置後、塗料供給用遮断弁を開き塗料供給口から
塗料を吸引することによって、最初、被塗物内面に塗膜
を形成し、引き続き、被塗部の上部及び枝管部など開口
部から流出した塗料が被塗物外面に塗膜を形成した後、
余剰の塗料が架台の空隙部から排気管を経由して真空槽
内から排出されることを特徴とする真空塗装方法を提供
することにある。According to a second aspect of the present invention, by using the apparatus according to the first aspect, a preheated object to be coated is transported into a vacuum tank and installed on a frame, and then a cutoff valve for paint supply is opened to open a paint supply port. First, a coating film was formed on the inner surface of the object to be coated by sucking the paint from the coating material, and subsequently, the paint flowing out from the openings such as the upper part of the object to be coated and the branch pipe part formed the film on the outer surface of the object to be coated. rear,
It is an object of the present invention to provide a vacuum coating method characterized in that excess paint is discharged from the vacuum chamber through the exhaust pipe from the void portion of the frame.
【００１１】請求項３に記載の発明は、請求項１記載の
装置を用い、予熱後の被塗物表面温度において被塗物表
面に粉体溶融層を形成すると共に硬化反応が進行し、焼
付け工程を省略可能な特性を保有する粉体塗料を用いる
ことを特徴とする真空粉体塗装方法を提供することにあ
る。According to a third aspect of the present invention, by using the apparatus according to the first aspect, a powder melting layer is formed on the surface of the article to be coated at the surface temperature of the article to be coated after preheating, and a curing reaction proceeds to cause baking. It is an object of the present invention to provide a vacuum powder coating method which is characterized by using a powder coating material having a characteristic that a step can be omitted.
【００１２】請求項４に記載の発明は、請求項１記載の
装置において、塗料供給配管に設置された遮断弁に変わ
って三方バルブを用いることによって外気又は不活性ガ
スの吸引を可能としたことを特徴とする真空塗装装置を
提供することにある。According to a fourth aspect of the present invention, in the apparatus according to the first aspect, the use of a three-way valve instead of the shutoff valve installed in the paint supply pipe enables suction of outside air or inert gas. The present invention is to provide a vacuum coating device.
【００１３】請求項５に記載の発明は、請求項４に記載
の装置を用い、三方バルブを開け、外気又は不活性ガス
を吸引することによって真空塗装槽内部の各部位の塗料
流れの抵抗を平均化すること、被塗物表面への粉体の供
給を促進するため粉体に旋回流動性を付与することを可
能としたことを特徴とした真空塗装方法を提供すること
にある。According to a fifth aspect of the present invention, by using the apparatus according to the fourth aspect, a three-way valve is opened, and outside air or an inert gas is sucked to reduce the resistance of the paint flow in each portion inside the vacuum coating tank. It is an object of the present invention to provide a vacuum coating method characterized by averaging and imparting swirling fluidity to the powder in order to accelerate the supply of the powder to the surface of the object to be coated.
【００１４】請求項６に記載の発明は、真空塗装槽内部
の各部位の塗料流れの抵抗の平均化および旋回流動性を
微細に制御するために真空槽側壁に複数個の外気又は不
活性ガスの吸引口を取付けること特徴とした請求項１ま
たは請求項３に記載の真空塗装装置を提供することにあ
る。According to a sixth aspect of the present invention, a plurality of outside air or an inert gas is provided on the side wall of the vacuum tank in order to finely control the averaging of the resistance of the paint flow and the swirling fluidity of each portion inside the vacuum coating tank. The vacuum coating device according to claim 1 or 3, wherein the suction port is attached.
【００１５】請求項７に記載の発明は、請求項６記載の
装置を用い、塗料の流れ、旋回流動制御を微細に行うこ
とによって、より塗膜の平滑度を高めたことを特徴とす
る真空塗装方法を提供することにある。The invention according to claim 7 is a vacuum characterized in that the smoothness of the coating film is further enhanced by finely controlling the flow of the paint and the swirling flow using the apparatus according to claim 6. To provide a painting method.
【００１６】請求項８に記載の発明は、真空槽上部に塗
料拡散板を具備する塗料供給口を付加したことを特徴と
する請求項６に記載の真空塗装装置を提供することにあ
る。The invention according to claim 8 is to provide a vacuum coating apparatus according to claim 6, wherein a paint supply port having a paint diffusion plate is added to the upper part of the vacuum chamber.
【００１７】請求項９に記載の発明は、請求項８に記載
の装置を用い、被塗物外表面における塗料の上部から下
方への流れにおいて死角となる部位を解消し、表面塗膜
の形成を促進することを特徴とする真空塗装方法を提供
することにある。According to a ninth aspect of the present invention, by using the apparatus according to the eighth aspect, the blind spots in the downward flow of the paint on the outer surface of the object to be coated are eliminated, and the surface coating film is formed. Another object of the present invention is to provide a vacuum coating method which is characterized by promoting
【００１８】請求項１０に記載の発明は、真空槽内の底
辺で且つ被塗物架台の内側に塗料供給口を１個、外側に
塗料供給口を複数個設置し、供給口に繋がる各塗料供給
配管には外気又は不活性ガスの吸引口を兼ね備えた三方
バルブを設け、真空槽上部に排気口を設けることを特徴
とした真空塗装装置を提供することにある。According to a tenth aspect of the present invention, one paint supply port is provided at the bottom of the vacuum chamber and inside the object frame, and a plurality of paint supply ports are provided at the outside, and each paint is connected to the supply port. It is an object of the present invention to provide a vacuum coating apparatus characterized in that a three-way valve having a suction port for the outside air or an inert gas is provided in the supply pipe, and an exhaust port is provided at the upper part of the vacuum chamber.
【００１９】請求項１１記載の発明は、請求項１０記載
の装置を用い、被塗物内外面に別々の種類または濃度の
塗料を供給し、内外面において別の塗膜厚み、塗装色、
塗料材質を容易に変更できることを特徴とする真空塗装
方法を提供することにある。According to an eleventh aspect of the present invention, by using the apparatus according to the tenth aspect, coating materials of different types or concentrations are supplied to the inner and outer surfaces of the object to be coated, and different coating film thicknesses and coating colors are applied to the inner and outer surfaces.
It is an object of the present invention to provide a vacuum coating method characterized in that the material of the coating material can be easily changed.
【００２０】請求項１２に記載の発明は、上記請求項３
に記載以外の塗料が粉体塗料または水性塗料であること
を特徴とする真空塗装方法を提供することにある。The invention according to claim 12 is the above-mentioned claim 3.
It is another object of the present invention to provide a vacuum coating method, characterized in that the coating material other than the above is a powder coating material or a water-based coating material.
【００２１】[0021]
【発明の実施の形態】以下図３から図６までを参照し
て、本発明の実施の形態を説明する。図３は、本発明の
構成範囲である真空塗装槽、塗料供給槽、塗料回収槽、
及び回収した塗料を塗料供給槽に還流するたスクリュウ
装置を破線で囲み明確化すると共に、一般的な塗装シス
テムに組込み図示したものである。本発明の中で、特殊
な粉体塗料を使用する限りにおいて焼付工程を省略でき
る場合についても記載しているが、本図においては焼付
工程を残したシステム構成となっている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. FIG. 3 shows a vacuum coating tank, a paint supply tank, a paint recovery tank, which are the constituent ranges of the present invention.
Further, the screw device for circulating the recovered paint to the paint supply tank is surrounded by a broken line for clarification, and is also incorporated in a general coating system and illustrated. Although a case where the baking process can be omitted as long as a special powder coating is used is also described in the present invention, the system configuration has the baking process left in this figure.
【００２２】図４は、塗料として粉体塗料を用いた場合
を例にとり、本発明の特徴であるの粉体塗料供給と外気
又は不活性ガスの供給系統および真空排気、粉体回収系
統を図示したものである。すなわち、真空槽１内のほぼ
中央部に設置した架台３上に被塗物２を置く。この場合
に用いる架台は上下２枚のリング板を４本の円柱で支え
る空隙を有する構造となっている。塗料供給槽８は流動
層タイプであり制御盤１７から調整された外気又は不活
性ガスがバルブ１６を介して供給される。塗料供給量の
定量性を高めるためサブタンク１０内のインナーメッシ
ュバイブレーター１１及びスクリュウ１２、整流板１
３、インジェクター１４を用い粉体塗料は供給される。
供給配管はバルブ１８を介して塗料供給口に接続されて
いる。予め予熱された被塗物を設置、真空排気される。
表面温度が適温に達した時点でバルブ１８を開き塗料を
供給する。塗料供給と同時にバルブ１９、バルブ２０及
びバルブ２１の開度を調整することによって外気または
不活性ガスを供給し、粉体の流れ抵抗、旋回流動性を高
めことが可能となり被塗物内外表面形成する塗膜の高い
平滑度が達成されることが確認できた。また、バルブ１
８を閉じ塗料の供給を停止すると、瞬時に被塗物内部及
び真空塗装槽内に残留していた塗料は排気系統に移送さ
れ、塗料のタレや溜りの生成が回避できることが明らか
となった。また、排出された粉体塗料はサイクロン４を
用い回収されロータリーバルブ５、篩振トウ機６を経る
ことによって循環使用することが可能であり、塗料利用
効率が大幅に向上することが確認できた。FIG. 4 illustrates the case where powder coating is used as the coating, showing the powder coating supply and the supply system of outside air or inert gas, the vacuum exhaust, and the powder recovery system, which are the features of the present invention. It was done. That is, the object to be coated 2 is placed on the pedestal 3 installed in the vacuum chamber 1 at substantially the center thereof. The mount used in this case has a structure in which two upper and lower ring plates are supported by four cylinders. The paint supply tank 8 is of a fluidized bed type, and external air or an inert gas adjusted from a control panel 17 is supplied via a valve 16. The inner mesh vibrator 11 and the screw 12 in the sub-tank 10 and the current plate 1 in order to improve the quantitativeness of the amount of paint supplied.
3. The powder paint is supplied using the injector 14.
The supply pipe is connected to the paint supply port via a valve 18. A preheated object to be coated is installed and evacuated.
When the surface temperature reaches an appropriate temperature, the valve 18 is opened and the paint is supplied. By adjusting the opening of the valve 19, valve 20 and valve 21 at the same time as the supply of the paint, it is possible to supply the outside air or an inert gas to enhance the flow resistance and swirling fluidity of the powder, thereby forming the inner and outer surfaces of the object to be coated. It was confirmed that a high smoothness of the coating film was achieved. Also, valve 1
When 8 was closed and the supply of paint was stopped, the paint remaining inside the article to be coated and in the vacuum coating tank was instantaneously transferred to the exhaust system, and it became clear that sagging and accumulation of paint could be avoided. Further, it was confirmed that the discharged powder coating material can be recycled by being recovered by using the cyclone 4 and passing through the rotary valve 5 and the sieving tow machine 6, and the coating material utilization efficiency can be significantly improved. .
【００２３】図５は請求項１に記載の発明の実施例を図
示したものである。２重管内管２２は途料供給配管であ
りエアー駆動式遮断弁２３を介して塗料供給系に接続さ
れている。塗料供給口から供給された塗料は被塗物内面
に塗膜層を形成しながら開口部２４及び２５から流出
し、排気の流れに沿って上方から下方へ移行し、架台空
隙２６を経由して２重管の外管２７、すなわち排気管を
通じて排気系統に搬送される。その過程で、被塗物外面
に塗膜層を形成することが確認できた。FIG. 5 shows an embodiment of the invention described in claim 1. The double pipe inner pipe 22 is a temporary supply pipe, and is connected to the paint supply system via an air-driven shutoff valve 23. The paint supplied from the paint supply port flows out from the openings 24 and 25 while forming a coating film layer on the inner surface of the object to be coated, moves from the upper side to the lower side along the flow of exhaust gas, and passes through the gantry cavity 26. It is conveyed to the exhaust system through the outer pipe 27 of the double pipe, that is, the exhaust pipe. In the process, it was confirmed that a coating layer was formed on the outer surface of the article to be coated.
【００２４】図６は請求項９に記載の発明の実施例に関
する装置図である。被塗物の形状によっては被塗物内面
から開口部を経て流出した塗料流れ、あるいは真空槽上
部に設けた塗料供給流れのみでは被塗物内外面全面に渡
り平滑な塗膜の形成が確保困難な場合、内外面塗膜厚み
や塗装色を別々に設定したい場合に対処するため、真空
槽内の底辺で且つ被塗物架台の内側に塗料供給口を１
個、外側に塗料供給口を複数個設置した。供給口に繋が
る各塗料供給配管には外気又は不活性ガスの吸引口を兼
ね備えた三方バルブ２８，２９及び３０を設けた。ま
た、真空槽上部に排気口を設けた。このような装置を用
いることによって、管内外面の塗膜の平滑度が一段と向
上しより厳しい塗膜厚みの管理基準範囲の容易に達成で
き、また内外面塗膜厚みや塗装色を別々に設定こと容易
に達成可能であることを確認できた。FIG. 6 is an apparatus diagram relating to an embodiment of the invention described in claim 9. Depending on the shape of the object to be coated, it is difficult to secure the formation of a smooth coating film on the entire inner and outer surfaces of the object to be coated only by the flow of the paint flowing out from the inner surface of the object through the opening or the flow of the coating material provided at the top of the vacuum tank. In this case, in order to deal with the case where the coating thickness and coating color of the inner and outer surfaces are to be set separately, a paint supply port is provided at the bottom of the vacuum chamber and inside the object base.
A plurality of paint supply ports were installed on each side and outside. Three-way valves 28, 29, and 30 also provided as suction ports for the outside air or inert gas were provided in each paint supply pipe connected to the supply port. Further, an exhaust port was provided above the vacuum chamber. By using such a device, the smoothness of the coating film on the inner and outer surfaces of the pipe can be further improved, and a stricter control standard range of the coating thickness can be easily achieved, and the coating thickness and coating color on the inner and outer surfaces can be set separately. It was confirmed that it could be easily achieved.
【００２５】[0025]
【発明の効果】本発明の場合、粉体が被塗物表面に付着
する力は被塗物表面に形成された溶融層の粘着力による
ものであり、従来技術と明らかに異なる範疇に属するも
のである。また、装置もシンプルで、高圧電源を使用し
ないことから操作性、安全性、経済性にも優れている。
さらに、予め加熱した被塗物を真空槽に設置し、真空下
において粉体塗料を吸引し管状等被塗物の内外表面を塗
装することにより、塗装効率および省力化度を高めると
ともに、大幅なコストダウン及び品質向上を可能とする
ことができる。In the case of the present invention, the force by which the powder adheres to the surface of the article to be coated is due to the adhesive force of the molten layer formed on the surface of the article to be coated, and belongs to a category that is clearly different from the prior art. Is. In addition, the device is simple and does not use a high-voltage power source, so it has excellent operability, safety, and economy.
Furthermore, the preheated object to be coated is installed in a vacuum tank, and the powder coating material is sucked under vacuum to coat the inner and outer surfaces of the object to be coated such as a tubular shape, thereby increasing the coating efficiency and labor saving and It is possible to reduce costs and improve quality.
【図１】 引用した特許に記載の真空静電粉体塗装図で
ある。FIG. 1 is a vacuum electrostatic powder coating diagram described in the cited patent.
【図２】 引用した特許に記載のプロバック法による管
内面の塗装装置である。FIG. 2 is a coating apparatus for the inner surface of the pipe by the Provac method described in the cited patent.
【図３】本発明の真空塗装システム範囲のブロック図で
ある。FIG. 3 is a block diagram of the vacuum coating system range of the present invention.
【図４】本発明の真空塗装装置のシステム概要図であ
る。FIG. 4 is a system schematic diagram of the vacuum coating apparatus of the present invention.
【図５】本発明請求項１に記載の発明の装置図である。FIG. 5 is an apparatus diagram of the invention according to claim 1 of the present invention.
【図６】本発明請求項９に記載の発明に対応した真空塗
装装置図である。FIG. 6 is a diagram of a vacuum coating device corresponding to the invention according to claim 9 of the present invention.
１０１：塗料用箱 １１１：スプレーガン
１２１：低圧タンク
１０２：箱本体 １１２：噴出口
１２２：真空ポンプ
１０３：蓋 １１３：供給装置
１２３：吸込口
１０４：シール部材 １１４：供給管
１２４：排気口
１０６：回転軸 １１５：高圧発生装置
１２５：フィルタ
１０７：軸受 １１６：高圧ケーブル
１２６：吸気口
１０８：モーター １１８：排気
１２７：排気口
１０９：吊下部 １１９：フィルタ
１２９：大気導入口
１３１：ドレイン口 １４３：排出管
１５６：流入口
１３２：開平弁 １４４：回収容器
Ｐ：粉体塗料
１３５：サイクロン １４６：吊下軸
Ｘ：被塗物
１３６：入口 １４７：ワイヤ
Ｖ１：第１開平弁
１３７：排出口 １４８：吊下部
Ｖ２：第２開平弁
１３８回収容器 １５０：絶縁ブロック
Ｖ３：第３開平弁
１４０：エゼクタ− １５２：バイブレーター
１４１：開平弁 １５４：多孔板
１４２：空気供給源 １５５：空気室
２０１：被覆材槽（塗料槽） ２１１：連絡管
２０２：被覆材(塗料) ２１２：サイクロン
２０３：吸引管 ２１３：フィルタ
２０４：ソケット ２１４：連結管
２０５：被加工物体(被塗物) ２１５：高圧空気管
２０６：ソケット ２１６：バルブ
２０７：フィルタ ２１７：常圧空気口
２０８：チャンバ ２１８：バルブ
２１０：真空タンク ２１９：バルブ
１：真空塗装槽 ４：サイクロン
７：真空ポンプ
２：被塗物 ５：ロータリーバルブ
８：塗料供給槽
３：被塗物架台 ６：篩振とう機
９：レベラー(静電容量式)
１０：サブタンク １６：エ
アーバルブ(粉体流動用)
１１：インナーメッシュバイブレーター １７：制
御盤
１２：スクリュー １８：塗
料供給遮断弁
１３：整流板 １９：エ
アーバルブ（粉体流動用）
１４：インジェクター ２０：エ
アーバルブ（粉体流動用）
１５：エアーバルブ（インジェクター供給用）２１：エ
アーバルブ（粉体流動用）
２２：内管 ２７：外管
２３：遮断弁 ２８：三方バルブ
２４：開口部 ２９：三方バルブ
２５：開口部 ３０：三方バルブ
２６：架台空隙101: paint box 111: spray gun
121: Low pressure tank 102: Box body 112: Jet port
122: Vacuum pump 103: Lid 113: Supply device
123: Suction port 104: Seal member 114: Supply pipe
124: Exhaust port 106: Rotating shaft 115: High pressure generator
125: Filter 107: Bearing 116: High-voltage cable
126: Intake port 108: Motor 118: Exhaust
127: Exhaust port 109: Suspended part 119: Filter
129: Atmosphere introduction port 131: Drain port 143: Exhaust pipe
156: Inlet 132: Kaihei valve 144: Recovery container
P: Powder coating 135: Cyclone 146: Suspended shaft
X: coated object 136: inlet 147: wire
V1: First flattening valve 137: Discharge port 148: Suspended part
V2: Second flattening valve 138 collection container 150: Insulation block
V3: Third flattening valve 140: Ejector 152: Vibrator 141: Flattening valve 154: Perforated plate 142: Air supply source 155: Air chamber 201: Coating material tank (paint tank) 211: Communication pipe 202: Coating material (paint) 212: Cyclone 203: Suction pipe 213: Filter 204: Socket 214: Connection pipe 205: Workpiece (workpiece) 215: High pressure air pipe 206: Socket 216: Valve 207: Filter 217: Normal pressure air port 208: Chamber 218: Valve 210: Vacuum tank 219: Valve 1: Vacuum coating tank 4: Cyclone
7: Vacuum pump 2: Object to be coated 5: Rotary valve
8: Paint supply tank 3: Platform to be coated 6: Sieve shaker
9: Leveler (capacitance type) 10: Sub tank 16: Air valve (for powder flow) 11: Inner mesh vibrator 17: Control panel 12: Screw 18: Paint supply cutoff valve 13: Rectifier plate 19: Air valve (powder) Body flow) 14: Injector 20: Air valve (for powder flow) 15: Air valve (for injector supply) 21: Air valve (for powder flow) 22: Inner pipe 27: Outer pipe 23: Shut-off valve 28: Three-way valve 24: Opening part 29: Three-way valve 25: Opening part 30: Three-way valve 26: Mounting space
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０５Ｃ 19/04 Ｂ０５Ｃ 19/04 Ｂ０５Ｄ 3/02 Ｂ０５Ｄ 3/02 Ｂ 7/22 7/22 Ｃ Ｆターム(参考） 4D075 AA01 AA24 AA72 AA73 AA74 AA76 AA78 AA86 AG01 AG21 AG23 BB23X BB29Y CA48 DA15 DA19 DA20 DB02 DB36 DB47 DB53 4F035 CE01 CE04 CF00 4F040 AA04 AA35 AB04 BA42 CC05 CC06 CC14 CC20 4F042 AA03 AB03 BA13 BA19 CA01 CB03 CB08 CB10 CB12 CB18 CB24 CC03 CC07 CC15 CC24 CC30 DA09 DB17 DC01 DF07 DF12 EA01 EA02 EA04 EA07 EA08 EC04 EC05 EC06 EC08 EC09 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 7 identification code FI theme code (reference) B05C 19/04 B05C 19/04 B05D 3/02 B05D 3/02 B 7/22 7/22 C F term ( (Reference) 4D075 AA01 AA24 AA72 AA73 AA74 AA76 AA78 AA86 AG01 AG21 AG23 BB23X BB29Y CA48 DA15 DA19 DA20 DB02 DB36 DB47 DB53 4F035 CE01 CE04 CF00 4F040 AA04 AA35 AB04 BA42 CC05 CC06 CC14 CC20 4080113A1935F04BA13BA20 CC07 CC15 CC24 CC30 DA09 DB17 DC01 DF07 DF12 EA01 EA02 EA04 EA07 EA08 EC04 EC05 EC06 EC08 EC09
Claims (12)
内に移送する装置、被塗物を真空槽の底辺のほぼ中央に
設置した上下２枚のリング板を複数本の円柱で支える空
隙を有する架台、当該架台の下に設置した排気管及び塗
料供給管の２重管構造、排気管と連結された減圧装置及
びサイクロン等からなる塗料回収装置、塗料供給配管に
遮断弁を経由して繋がる塗料供給装置から構成すること
を特徴とする真空塗装装置。1. A preheating furnace for an article to be coated, a device for transferring the article to be coated after preheating into a vacuum chamber, and a plurality of upper and lower ring plates with the article to be coated installed at approximately the center of the bottom of the vacuum chamber. With a space to be supported by the cylinder of the column, double pipe structure of exhaust pipe and paint supply pipe installed under the frame, paint recovery device consisting of decompression device and cyclone connected to the exhaust pipe, cut off to paint supply pipe A vacuum coating device comprising a paint supply device connected via a valve.
台上に設置後、塗料供給用遮断弁を開き塗料供給口から
塗料を吸引し、被塗物内面に塗膜を形成後、被塗部の上
部及び枝管部など開口部から流出した塗料が被塗物外面
に塗膜を形成した後、架台の空隙部、排気管を経由して
真空槽内から排出されることを特徴とする真空塗装方
法。2. A preheated object to be coated is transported into a vacuum chamber and installed on a pedestal, after which a paint supply shutoff valve is opened to suck the paint from the paint supply port to form a coating film on the inner surface of the object to be coated. , That the paint that has flowed out of the openings such as the upper part of the coated part and the branch pipe part forms a coating film on the outer surface of the coated object, and then is discharged from the vacuum chamber through the void part of the frame and the exhaust pipe. Characteristic vacuum coating method.
面に粉体溶融層を形成すると共に硬化反応が進行し、焼
付け工程を省略可能な特性を保有する粉体塗料を用いる
ことを特徴とする真空粉体塗装方法。3. Use of a powder coating material which has a characteristic that a powder melting layer is formed on the surface of the coating object at the surface temperature of the coating object after preheating and the curing reaction proceeds, and the baking step can be omitted. Characteristic vacuum powder coating method.
配管に設置された遮断弁に変わって三方バルブを用い外
気又は不活性ガスの吸引口を設けたことを特徴とする真
空塗装装置。4. The vacuum coating apparatus according to claim 1, wherein a three-way valve is used in place of the shutoff valve installed in the paint supply pipe to provide a suction port for outside air or an inert gas.
を開け、外気又は不活性ガスを吸引することによって真
空塗装槽内部の各部位の塗料流れ抵抗を平均化するこ
と、被塗物表面への粉体の供給を促進するため粉体に旋
回流動性を付与することを特徴とする真空塗装方法。5. The apparatus according to claim 4, wherein a three-way valve is opened and outside air or an inert gas is sucked to average the paint flow resistance of each site inside the vacuum coating tank. A vacuum coating method, wherein swirling fluidity is imparted to the powder in order to accelerate the supply of the powder to the surface.
の平均化および旋回流動性を微細に制御するために真空
槽側壁に複数個の外気又は不活性ガスの吸引口を取付け
ること特徴とした請求項１または請求項４に記載の真空
塗装装置。6. A plurality of outside air or inert gas suction ports are attached to the side wall of the vacuum tank in order to average the resistance of paint flow and finely control the swirling fluidity of each portion inside the vacuum coating tank. The vacuum coating device according to claim 1 or 4.
れ、旋回流動制御を微細に行うことによって、より塗膜
の平滑度を高めたことを特徴とする真空塗装方法。7. A vacuum coating method, wherein the smoothness of a coating film is further enhanced by finely controlling the flow of a coating material and a swirling flow using the apparatus according to claim 6.
給口を付加したことを特徴とする請求項６に記載の真空
塗装装置。8. The vacuum coating apparatus according to claim 6, wherein a paint supply port having a paint diffusion plate is added to the upper part of the vacuum chamber.
面における塗料の上部から下方への流れにおいて死角と
なる部位を解消し、表面塗膜の形成を促進することを特
徴とする真空塗装方法。9. The apparatus according to claim 8 is used to eliminate the blind spots in the downward flow of the paint on the outer surface of the object to be coated, thereby promoting the formation of a surface coating film. Vacuum coating method.
に塗料供給口を１個、外側に塗料供給口を複数個設置
し、供給口に繋がる各塗料供給配管には外気又は不活性
ガスの吸引口を兼ね備えた三方バルブを設け、真空槽上
部に排気口を設けることを特徴とした真空塗装装置。10. A paint supply port is provided at the bottom of the vacuum chamber and inside the object rack, and a plurality of paint supply ports are provided at the outside, and each paint supply pipe connected to the supply port is exposed to outside air or air. A vacuum coating device that features a three-way valve that doubles as a suction port for active gas, and an exhaust port at the top of the vacuum chamber.
内外面に別々の種類または濃度の塗料を供給し、内外面
において別の塗膜厚み、塗装色、塗料材質を容易に変更
できることを特徴とする真空塗装方法。11. The apparatus according to claim 10 is used to supply paints of different types or concentrations to the inner and outer surfaces of an object to be coated, and to easily change different coating thicknesses, coating colors and paint materials on the inner and outer surfaces. Vacuum coating method characterized by being able to do.
３，５，７，８、９及び１１に記載の塗料が粉体塗料ま
たは水性塗料であることを特徴とする真空塗装方法。12. A claim 2 other than the above claim 3.
A vacuum coating method, wherein the coating material according to 3, 5, 7, 8, 9 and 11 is a powder coating material or a water-based coating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001225885A JP2003033699A (en) | 2001-07-26 | 2001-07-26 | Vacuum coating method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001225885A JP2003033699A (en) | 2001-07-26 | 2001-07-26 | Vacuum coating method and apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003033699A true JP2003033699A (en) | 2003-02-04 |
Family
ID=19058805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001225885A Pending JP2003033699A (en) | 2001-07-26 | 2001-07-26 | Vacuum coating method and apparatus |
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| Country | Link |
|---|---|
| JP (1) | JP2003033699A (en) |
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