JP5335296B2 - Painting method - Google Patents
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- JP5335296B2 JP5335296B2 JP2008158728A JP2008158728A JP5335296B2 JP 5335296 B2 JP5335296 B2 JP 5335296B2 JP 2008158728 A JP2008158728 A JP 2008158728A JP 2008158728 A JP2008158728 A JP 2008158728A JP 5335296 B2 JP5335296 B2 JP 5335296B2
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- 238000000034 method Methods 0.000 title description 9
- 238000010422 painting Methods 0.000 title description 6
- 238000000576 coating method Methods 0.000 claims abstract description 168
- 239000011248 coating agent Substances 0.000 claims abstract description 158
- 239000000463 material Substances 0.000 claims abstract description 95
- 230000005291 magnetic effect Effects 0.000 claims abstract description 42
- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 22
- 239000003973 paint Substances 0.000 claims description 34
- 230000005408 paramagnetism Effects 0.000 claims description 14
- 230000001747 exhibiting effect Effects 0.000 claims description 9
- 230000003993 interaction Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 abstract description 2
- 230000005298 paramagnetic effect Effects 0.000 abstract description 2
- 230000002452 interceptive effect Effects 0.000 abstract 2
- 229910052782 aluminium Inorganic materials 0.000 description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 8
- 238000009503 electrostatic coating Methods 0.000 description 8
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 7
- 238000007796 conventional method Methods 0.000 description 7
- 230000004907 flux Effects 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 239000003302 ferromagnetic material Substances 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002907 paramagnetic material Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
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- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
本発明は塗装方法に関し、特にアルミニウム片等の微細な光輝材片を分散させた塗料により被塗物を塗装する所謂メタリック塗装の塗装方法に関する。 The present invention relates to a coating method, and more particularly to a so-called metallic coating method for coating an object to be coated with a paint in which fine glitter material pieces such as aluminum pieces are dispersed.
メタリック塗装においてメタリック感や色感などに優れた高い塗装仕上がり品質を得るには、塗膜中に分散する光輝材片を極力均一な姿勢で塗膜の表面側に面部分が向く姿勢にすることが重要であることが知られているが、従来、塗膜中における光輝材片等の微細片の姿勢を調整する方法としては次の（イ）〜（ハ）の方法が提案されている。 In order to obtain a high coating finish with excellent metallic feel and color in metallic paint, make sure that the glitter material pieces dispersed in the paint film are as uniform as possible with the face part facing the surface side of the paint film. However, conventionally, the following methods (a) to (c) have been proposed as methods for adjusting the posture of fine pieces such as glitter pieces in the coating film.
（イ）鉄などの磁性体（強磁性体）からなる微細片を分散させた塗料により被塗物の表面に塗膜を形成し、この塗膜が乾燥する前に塗膜中の磁性体からなる微細片に磁石を作用させることで、磁性体（強磁性体）の磁気的性質により、その微細片の姿勢を磁石による磁界の磁力線に従う姿勢に調整する方法（特許文献１参照）。 (B) A coating film is formed on the surface of the object to be coated with a coating in which fine pieces made of a magnetic material (ferromagnetic material) such as iron are dispersed, and before the coating film is dried, A method of adjusting the posture of the fine piece to a posture according to the magnetic field lines of the magnetic field by the magnetic property of the magnetic material (ferromagnetic material) by causing the magnet to act on the fine piece (see Patent Document 1).
（ロ）常磁性体であるアルミニウムは一般に磁石によって影響を受けないが、未乾燥な塗膜中のアルミニウム片（アルミ粒子）であれば被塗物の裏面から磁石をあてて磁界を加えると、その磁界部分におけるアルミニウム片の配向がわずかに変化するとの知見に基づき、アルミニウム片を分散させた塗料により被塗物の表面に塗膜を形成し、この塗膜が乾燥する前に被塗物の裏面に磁石をあてることで、その磁石の磁界によりアルミニウム片の配向を変化させて塗膜中におけるアルミニウム片の姿勢を調整する方法（特許文献２参照）。 (B) Aluminum, which is a paramagnetic material, is generally not affected by a magnet, but if it is an aluminum piece (aluminum particles) in an undried coating, applying a magnetic field by applying a magnet from the back of the object to be coated, Based on the knowledge that the orientation of the aluminum pieces in the magnetic field part slightly changes, a coating film is formed on the surface of the object to be coated with the paint in which the aluminum pieces are dispersed, and before the coating film dries, A method of adjusting the posture of the aluminum piece in the coating film by applying a magnet to the back surface and changing the orientation of the aluminum piece by the magnetic field of the magnet (see Patent Document 2).
（ハ）アルミニウム片（アルミ箔片）を分散させた塗料を用いて静電塗装により被塗物の表面に塗膜を形成し、この静電塗装に続き塗膜が乾燥する前に、被塗物側電極（第１電極）を被塗物に対峙させて静電誘導により被塗物を帯電させるともに、反対極性の塗膜側電極（第２電極）を塗膜表面に対峙させ、この状態で塗膜側電極と被塗物とを相対的に移動させることにより、塗膜中のアルミニウム片と塗膜側電極との間、及び、塗膜中のアルミニウム片と帯電被塗物との間に生じる静電気力を利用して、塗膜中におけるアルミニウム片の姿勢を調整する方法（特許文献３参照）。 (C) A coating film is formed on the surface of the object by electrostatic coating using a paint in which aluminum pieces (aluminum foil pieces) are dispersed, and the coating is performed before the coating film is dried following this electrostatic coating. The object side electrode (first electrode) is opposed to the object to be coated, and the object to be charged is charged by electrostatic induction, while the opposite polarity coating film side electrode (second electrode) is opposed to the surface of the film. By relatively moving the coating film side electrode and the object to be coated, between the aluminum piece in the coating film and the film side electrode, and between the aluminum piece in the coating film and the charged object to be coated A method of adjusting the posture of the aluminum piece in the coating film using the electrostatic force generated in the coating (see Patent Document 3).
しかし、上記（イ）の従来方法は、磁性体（強磁性体）の強い磁性を利用するものであるため、一般に多用されるアルミニウム片を分散させたメタリック塗料など、常磁性を示す光輝材片を分散させた塗料を用いる場合には適用できない問題があった。 However, since the conventional method (a) uses the strong magnetism of a magnetic material (ferromagnetic material), a bright material piece exhibiting paramagnetism, such as a metallic paint in which commonly used aluminum pieces are dispersed. There is a problem that cannot be applied in the case of using a paint in which is dispersed.
また、上記（ロ）の従来方法は、上記（イ）の従来方法において磁性体（強磁性体）の微細片に代えアルミニウム片等の常磁性を示す光輝材片を分散させた塗料を用いる場合に相当するが、このように常磁性を示す光輝材片を分散させた塗料を用いる場合において上記（イ）の従来方法を適用したとしても、アルミニウム片等の常磁性を示す光輝材片は磁場の印加に対して、その磁力線に従う方向にごく僅かに磁化する磁性を示すだけであることから、塗膜中の光輝材片を効果的に姿勢調整することが難しく、実用には耐えないものであった。 In the conventional method (b), a paint in which bright material pieces exhibiting paramagnetism such as aluminum pieces are dispersed in place of the fine pieces of the magnetic material (ferromagnetic material) in the conventional method (a) is used. However, even when the conventional method (a) above is applied in the case of using a coating material in which a bright material piece exhibiting paramagnetism is dispersed, the bright material piece showing paramagnetism such as an aluminum piece is a magnetic field. It is difficult to effectively adjust the position of the glitter material in the coating film because it shows only a slight magnetization in the direction of the magnetic field in response to the application of the magnetic field. there were.
一方、上記（ハ）の従来方法は、静電分極を利用することから、アルミニウム片等の常磁性を示す光輝材片についても塗膜中における姿勢を調整し得るが、防爆が要求される塗装において高電圧の電極を被塗物や塗膜に対峙させるため、それら電極に対する絶縁処理等の防爆処理が必要になり、そのことで設備が複雑化する問題があった。 On the other hand, since the conventional method (c) uses electrostatic polarization, it is possible to adjust the posture in the coating film even for the glittering material piece showing paramagnetism such as an aluminum piece, but a coating that requires explosion-proofing. In order to make high-voltage electrodes confront an object to be coated or a coating film, an explosion-proof treatment such as an insulation treatment is required for the electrodes, which causes a problem of complicated equipment.
これらの実情に鑑み、本発明の主たる課題は、塗膜中における光輝材片の姿勢を調整するのに合理的な調整方式を採用することで、上記の如き問題を効果的に解消し、また併せて塗着効率の向上や塗装能率の向上を可能にする点にある。 In view of these circumstances, the main problem of the present invention is to effectively solve the above problems by adopting a rational adjustment method to adjust the posture of the glitter material piece in the coating film, and At the same time, it is possible to improve the coating efficiency and the coating efficiency.
本発明の第１特徴構成は、光輝材片を分散させた塗料により被塗物の表面に塗膜を形成する塗装方法に係り、その特徴は、
常磁性を示す光輝材片を分散させた塗料により被塗物の表面に塗膜を形成し、その後、この塗膜が乾燥する前に、電磁誘導操作により塗膜中の光輝材片に渦電流を生じさせて、この渦電流による形成磁界により光輝材片の個々と周辺他物との間に磁気的な相互作用力を生じさせ、この相互作用力により塗膜中における光輝材片の姿勢を調整するのに、
塗料を吐出する塗装機を可動アームの先端に装備した塗装装置と、磁石又はコイルを可動アームの先端に装備した配向調整装置とを並置しておき、
常磁性を示す光輝材片を分散させた塗料を前記塗装機から吐出させながら前記塗装装置の可動アーム操作により前記塗装機を被塗物の表面に沿わせる状態に移動させて被塗物の表面に塗膜を形成し、
その後、この塗膜が乾燥する前に、前記電磁誘導操作として、前記磁石又は通電状態の前記コイルを前記配向調整装置の可動アーム操作により被塗物の塗膜に沿わせる状態に移動させて又は塗膜に沿わせる状態に移動させながら回転もしくは振動させて塗膜中における光輝材片の姿勢を調整する点にある。
The first characteristic configuration of the present invention relates to a coating method in which a coating film is formed on the surface of an object to be coated with a paint in which a glitter material piece is dispersed.
A coating film is formed on the surface of the object to be coated with a paint in which bright material pieces exhibiting paramagnetism are dispersed, and then, before this coating film is dried, eddy current is applied to the bright material pieces in the coating film by electromagnetic induction operation. The magnetic field generated by this eddy current generates a magnetic interaction force between each of the glitter material pieces and the surrounding other objects, and this interaction force causes the glitter material pieces to have a posture in the coating film. to be adjusted,
A coating device equipped with a coating machine that discharges paint at the tip of the movable arm and an orientation adjustment device equipped with a magnet or coil at the tip of the movable arm are juxtaposed,
The surface of the object to be coated is moved by moving the coating machine to a state along the surface of the object to be coated by operating the movable arm of the coating apparatus while discharging the paint in which the bright material pieces exhibiting paramagnetism are discharged from the coating machine. To form a coating film,
Then, before the coating film is dried, as the electromagnetic induction operation, the magnet or the coil in the energized state is moved to a state along the coating film of the object by the movable arm operation of the orientation adjusting device or It is in the point which adjusts the attitude | position of the glittering material piece in a coating film by rotating or vibrating, moving to the state along a coating film.
この構成では、先述の（イ），（ロ）の従来方法の如く塗膜中の微細片を磁石による磁界の磁力線に従う方向に磁化させることで姿勢変化させるのではなく、塗膜中の光輝材片に生じさせた渦電流による形成磁界により光輝材片の個々と周辺他物との間に磁気的な相互作用力を生じさせることで光輝材片の姿勢を調整するから、電磁誘導操作による渦電流の発生が可能なものであれば、アルミニウム片を分散させた一般のメタリック塗料など、常磁性を示す光輝材片を分散させた塗料を用いる場合にも、塗膜中における光輝材片の姿勢を効果的に調整することができて、高い塗装仕上がり品質を得ることができる。 In this configuration, the bright material in the coating film is not changed by magnetizing the fine pieces in the coating film in the direction according to the magnetic field lines of the magnetic field by the magnet as in the conventional methods (a) and (b) described above. Because the magnetic field generated by the eddy current generated in the piece generates a magnetic interaction force between each of the bright material pieces and other peripheral objects, the position of the bright material piece is adjusted. If the current can be generated, the position of the glitter material piece in the coating film can be used even when using a paint in which a glitter material piece exhibiting paramagnetism is dispersed, such as a general metallic paint in which an aluminum piece is dispersed. Can be adjusted effectively, and high paint finish quality can be obtained.
また、電磁誘導操作により光輝材片に渦電流を生じさせることで光輝材片の姿勢を調整するから、先述の（ハ）の従来方法の如く光輝材片の姿勢を調整するための高電圧の電極を被塗物近くに配備する必要がなくて、その分、絶縁処理等の防爆処理を軽減することができ、これにより、設備の複雑化も回避できる。 Moreover, since the attitude of the glitter material piece is adjusted by generating an eddy current in the glitter material piece by electromagnetic induction operation, a high voltage for adjusting the attitude of the glitter material piece as in the conventional method (c) described above is used. There is no need to dispose the electrode near the object to be coated, and an explosion-proof treatment such as an insulation treatment can be reduced correspondingly, thereby making it possible to avoid complicated equipment.
そしてまた、上記の如く高い塗装仕上がり品質を得られることで、従前において塗膜中光輝材片の姿勢を極力良好にするために採られていた塗料粒子の小径化や塗料粒子の飛行パターンを整えるシェーピングエアの増量あるいは静電塗装における電極電圧の低減や塗膜の薄膜化などの間接的な対策も不要ないし軽減することができ、これにより、それら間接的な対策を採ることで生じていた塗着効率の低下や塗装能率の低下も回避することができて、塗着効率や塗装能率も効果的に高めることができる。 In addition, by obtaining a high coating finish quality as described above, the paint particles can be reduced in diameter and the flight pattern of the paint particles, which has been adopted to improve the position of the glitter material pieces in the coating film as much as possible. Indirect measures such as increasing the amount of shaping air or reducing the electrode voltage in electrostatic coating and reducing the thickness of the coating can be eliminated or eliminated. A decrease in deposition efficiency and a decrease in painting efficiency can be avoided, and a coating efficiency and a painting efficiency can be effectively increased.
なお、第１特徴構成の実施において、常磁性を示す光輝材片は、アルミニウムに限らず、常磁性を示すとともに電磁誘導操作により渦電流を生じ得るものであれば、その他の金属、導電性樹脂、絶縁物表面に導電性被膜処理を行ったものなど、種々の材質のものを用いることができる。 In the implementation of the first characteristic configuration, the bright material piece exhibiting paramagnetism is not limited to aluminum, and other metals and conductive resins may be used as long as they exhibit paramagnetism and can generate eddy currents by electromagnetic induction operation. Various materials such as those obtained by conducting a conductive coating on the surface of the insulator can be used.
また、第１特徴構成では、塗料を吐出する塗装機を可動アームの先端に装備した塗装装置と、磁石又はコイルを可動アームの先端に装備した配向調整装置とを並置しておき、常磁性を示す光輝材片を分散させた塗料を前記塗装機から吐出させながら前記塗装装置の可動アーム操作により前記塗装機を被塗物の表面に沿わせる状態に移動させて被塗物の表面に塗膜を形成し、その後、この塗膜が乾燥する前に、前記電磁誘導操作として、前記磁石又は通電状態の前記コイルを前記配向調整装置の可動アーム操作により被塗物の塗膜に沿わせる状態に移動させて又は塗膜に沿わせる状態に移動させながら回転もしくは振動させて塗膜中における光輝材片の姿勢を調整するから、塗装装置の可動アーム操作による塗膜の形成とそれに続く配向調整装置の可動アーム操作による塗膜中光輝材片の姿勢調整とを、並置した塗装装置と配向調整装置とで能率的に行うことができ、これにより、塗膜中における光輝材片の姿勢を適切に調整した高い塗装仕上がり品質の塗装品を能率良く生産することができる。 In the first feature configuration, a coating device that equips the tip of the movable arm with a coating machine that discharges paint and an orientation adjustment device that is equipped with a magnet or a coil at the tip of the movable arm are arranged in parallel. The coating machine on the surface of the object to be coated is moved by moving the coating machine along the surface of the object to be coated by operating the movable arm of the coating apparatus while discharging the paint in which the glitter material pieces shown are dispersed from the coating machine. After that, before the coating film is dried, as the electromagnetic induction operation, the magnet or the coil in the energized state is put in a state of being along the coating film of the object to be coated by the movable arm operation of the orientation adjusting device. Since the orientation of the glitter material piece in the coating film is adjusted by rotating or vibrating while moving or moving along the coating film, the coating film is formed by operating the movable arm of the coating device, and the orientation adjustment device that follows it. It is possible to efficiently adjust the position of the glitter material pieces in the paint film by operating the movable arm with the juxtaposed coating device and the orientation adjustment device. It is possible to efficiently produce high-quality finished products that have been adjusted.
なお、第１特徴構成の実施において、前記電磁誘導操作として、前記磁石を前記塗膜の近傍で移動させてもよい。 Incidentally, Oite the implementation of the first characterizing feature, as the electromagnetic induction operation, the magnet may be moved in the vicinity of the coating film.
この構成では、塗膜の近傍で磁石を移動させることにより塗膜中の光輝材片を通過する磁束数を変化させて光輝材片に渦電流を生じさせるから、磁石の移動操作というごく簡単な電磁誘導操作で第１特徴構成を容易に実施することができる。 In this configuration, moving the magnet in the vicinity of the coating film changes the number of magnetic fluxes that pass through the glitter material piece in the coating film, thereby generating an eddy current in the glitter material piece. The first characteristic configuration can be easily implemented by electromagnetic induction operation.
また、第１特徴構成の実施において、前記電磁誘導操作として、交流電流を通電している前記コイルを前記塗膜の近傍で移動させてもよい。 Further, Oite the implementation of the first characterizing feature, as the electromagnetic induction operation, the coils are energized alternating current may be moved in the vicinity of the coating film.
この構成では、交流電流の通電により生じるコイルの周期的な磁界変化と、そのコイルの移動による磁界の変位とにより、塗膜中の光輝材片を通過する磁束数を効果的に変化させることができ、これにより、光輝材片に渦電流を効果的に生じさせることができて、この渦電流による形成磁界を利用した前述の如き光輝材片の姿勢調整を一層効果的に行うことができる。 In this configuration, the number of magnetic fluxes passing through the glittering material pieces in the coating film can be effectively changed by the periodic magnetic field change of the coil caused by the application of alternating current and the displacement of the magnetic field due to the movement of the coil. Thus, an eddy current can be effectively generated in the glitter material piece, and the attitude adjustment of the glitter material piece as described above using the magnetic field formed by this eddy current can be performed more effectively.
さらに、第１特徴構成の実施において、前記電磁誘導操作として、前記塗膜の近傍で移動させる前記コイルにパルス状の直流電流を通電してもよい。 Furthermore, Oite the implementation of the first characterizing feature, as the electromagnetic induction operation, may be energized pulsed direct current to said coil to move in the vicinity of the front Kinurimaku.
この構成では、コイルに通電するパルス状の直流電流によりコイルの磁界を瞬発的に発生させることができるから、塗膜中の光輝材片を通過する磁束数を急激に変化させることができ、これにより、光輝材片に渦電流を効果的に生じさせることができて、この渦電流による形成磁界を利用した前述の如き光輝材片の姿勢調整を一層効果的に行うことができる。 In this configuration, since the magnetic field of the coil can be generated instantaneously by the pulsed direct current that flows through the coil, the number of magnetic fluxes passing through the glittering material pieces in the coating can be changed abruptly. Accordingly, an eddy current can be effectively generated in the glitter material piece, and the attitude adjustment of the glitter material piece as described above using the magnetic field formed by the eddy current can be more effectively performed.
またさらに、第１特徴構成の実施において、前記電磁誘導操作として、前記磁石又は通電状態の前記コイルを前記塗膜の近傍で回転又は振動させてもよい。 Furthermore, Oite the implementation of the first characterizing feature, as the electromagnetic induction operation, the coil of the magnet or energized state may be rotated or vibrated at the vicinity of the coating film.
この構成では、磁石又は通電状態のコイルを塗膜の近傍で回転又は振動させることで塗膜中の光輝材片を通過する磁束数を変化させるから、例えば前記電磁誘導操作として磁石や通電状態のコイルを塗膜の近傍で単に一方向へのみ一過的に移動させるなどに比べ、塗膜中の光輝材片に一層確実かつ十分に渦電流を生じさせることができ、これにより、前述の如き光輝材片の姿勢調整を一層効果的に行うことができる。 In this configuration, the number of magnetic fluxes passing through the bright material pieces in the coating film is changed by rotating or vibrating the magnet or the energized coil in the vicinity of the coating film. Compared to moving the coil only in one direction in the vicinity of the coating film, it is possible to generate eddy currents more reliably and sufficiently in the glitter material pieces in the coating film. It is possible to more effectively adjust the position of the glitter material piece.
なお、前記電磁誘導操作として、前記磁石を前記塗膜の近傍で移動させる構成、交流電流を通電している前記コイルを前記塗膜の近傍で移動させる構成、又は前記塗膜の近傍で移動させる前記コイルにパルス状の直流電流を通電する構成のいずれかと前記磁石又は通電状態の前記コイルを前記塗膜の近傍で回転又は振動させる構成との併行実施として、前記磁石又は通電状態の前記コイルを塗膜の近傍で塗膜に沿って移動させながら回転又は振動させるようにしてもよい。 As the electromagnetic induction operation, a configuration in which the magnet is moved in the vicinity of the coating film, a configuration in which the coil that is energized with an alternating current is moved in the vicinity of the coating film, or a movement in the vicinity of the coating film is used. as parallel implementation of the arrangement for rotating or vibrating the coil of the magnet or energized state with any of the configurations for energizing the pulsed direct current to the coil in the vicinity of the coating film, the coil of the magnet or energized You may make it rotate or vibrate, moving along the coating film in the vicinity of the coating film.
そうすれば、塗膜中の光輝材片にさらに効果的に渦電流を生じさせることができる。If it does so, an eddy current can be produced more effectively in the glittering material piece in a coating film.
本発明の第２特徴構成は、第１特徴構成の実施に好適な実施形態を特定するものであり、その特徴は、前記電磁誘導操作として、交流電流を通電している前記コイルを移動させる点にある。The second feature configuration of the present invention specifies an embodiment suitable for the implementation of the first feature configuration, and the feature is that the coil that is energized with an alternating current is moved as the electromagnetic induction operation. It is in.
この構成では、交流電流の通電により生じるコイルの周期的な磁界変化と、そのコイルの移動による磁界の変位とにより、塗膜中の光輝材片を通過する磁束数を効果的に変化させることができ、これにより、光輝材片に渦電流を効果的に生じさせることができて、この渦電流による形成磁界を利用した前述の如き光輝材片の姿勢調整を一層効果的に行うことができる。In this configuration, the number of magnetic fluxes passing through the glittering material pieces in the coating film can be effectively changed by the periodic magnetic field change of the coil caused by the application of alternating current and the displacement of the magnetic field due to the movement of the coil. Thus, an eddy current can be effectively generated in the glitter material piece, and the attitude adjustment of the glitter material piece as described above using the magnetic field formed by this eddy current can be performed more effectively.
本発明の第３特徴構成は、第１特徴構成の実施に好適な実施形態を特定するものであり、その特徴は、前記電磁誘導操作として、移動させる前記コイルにパルス状の直流電流を通電する点にある。The third feature configuration of the present invention specifies an embodiment suitable for the implementation of the first feature configuration, and the feature is to apply a pulsed direct current to the coil to be moved as the electromagnetic induction operation. In the point.
この構成では、コイルに通電するパルス状の直流電流によりコイルの磁界を瞬発的に発生させることができるから、塗膜中の光輝材片を通過する磁束数を急激に変化させることができ、これにより、光輝材片に渦電流を効果的に生じさせることができて、この渦電流による形成磁界を利用した前述の如き光輝材片の姿勢調整を一層効果的に行うことができる。In this configuration, since the magnetic field of the coil can be generated instantaneously by the pulsed direct current that flows through the coil, the number of magnetic fluxes passing through the glittering material pieces in the coating can be changed abruptly. Accordingly, an eddy current can be effectively generated in the glitter material piece, and the attitude adjustment of the glitter material piece as described above using the magnetic field formed by the eddy current can be more effectively performed.
図１において、１は多関節ロボットなどの可動アーム１ａを備える塗装装置、２は同じく多関節ロボットなどの可動アーム２ａを備える配向調整装置であり、これら塗装装置１と配向調整装置２とは被塗物Ｗ（本例では自動車ボディ）の搬送経路に沿って並べるなどの配置で塗装ブース内に設置してある。
In FIG. 1, reference numeral 1 denotes a coating apparatus including a
塗装装置１の可動アーム１ａの先端には回転霧化式の静電塗装機３を装備してあり、この静電塗装機３は、高速回転により塗料をカップ縁から飛散させるベルカップ３ａと、このベルカップ３ａから飛散させる塗料を帯電させる高電圧発生器３ｂと、ベルカップ３ａから半径方向に飛散した塗料粒子群の飛行パターンをベルカップ後方からのシェーピングエア噴出により前向きに整えるエア噴出口３ｃ等を備えている。
The tip of the
一方、配向調整装置２の可動アーム２ａの先端には前面側をＮ極（又はＳ極）とし背面側をＳ極（又はＮ極）とする平板状の磁石４を装備してある。
On the other hand, the tip of the
これら塗装装置１と配向調整装置２とを用いて被塗物Ｗに塗装を施すにあたっては、常磁性を示すとともに電磁誘導操作により渦電流を生じ得るアルミニウム片等の光輝材片Ｚを分散させた塗料Ｔを静電塗装機３に供給し、この塗料Ｔを帯電状態でシェーピングエアＡとともに静電塗装機３から被塗物Ｗに向けて吐出させることで、被塗物Ｗと塗料粒子Ｔとの間に生じる静電引力により塗料粒子Ｔを被塗物Ｗの表面に塗着させる。
When coating the article W using the coating apparatus 1 and the orientation adjusting apparatus 2, the glittering material pieces Z such as aluminum pieces which show paramagnetism and can generate eddy currents by electromagnetic induction operation are dispersed. The coating material T is supplied to the
そして、このように塗料粒子Ｔを被塗物Ｗの表面に塗着させながら、塗装装置１の可動アーム操作により静電塗装機３を被塗物Ｗに対向する姿勢で被塗物Ｗの表面に沿わせて移動させることで、光輝材片Ｚが分散した塗膜Ｍを被塗物Ｗの表面に形成する。
Then, the surface of the object W to be coated is positioned in such a manner that the
この塗膜Ｍの形成に続き、その塗膜Ｍが乾燥して塗膜Ｍを形成する塗料Ｔの流動性が低下する前に、配向調整装置２の可動アーム操作により、そのアーム先端の磁石４を塗膜Ｍとの間隔を所定の小寸法ｄ（例えば１０ｍｍ）に保った状態で被塗物Ｗの塗膜Ｍに沿わせて移動させ、これにより、塗膜Ｍ中における光輝材片Ｚの姿勢を良好な塗装仕上がり品質が得られる所望の姿勢に調整する。
Following the formation of the coating film M, the
その後、塗装装置１の可動アーム操作による塗膜形成と配向調整装置２の可動アーム操作による光輝材片Ｚの姿勢調整とを複数回繰り返して、姿勢調整された光輝材片Ｚが分散する複数層の塗膜Ｍの積層を被塗物Ｗの表面に形成し、これにより、所要の塗装厚さの塗装を被塗物Ｗに施す（なお、条件によっては塗膜形成と姿勢調整とを各々一回のみ行って１層の塗膜Ｍだけを形成する場合もある）。 Thereafter, the coating film formation by the movable arm operation of the coating apparatus 1 and the attitude adjustment of the glitter material piece Z by the movable arm operation of the orientation adjusting apparatus 2 are repeated a plurality of times, and the plurality of layers in which the attitude-adjusted glitter material pieces Z are dispersed. Is formed on the surface of the object to be coated W. Thus, a coating having a required coating thickness is applied to the object to be coated W. In some cases, only one coating film M is formed by performing only once.
光輝材片Ｚの姿勢調整についてさらに詳述すると（図２，図３参照）、上記の如く配向調整装置２の可動アーム操作により磁石４を被塗物Ｗの塗膜Ｍに対し近接状態で沿わせて移動させることにより、その塗膜Ｍ中における光輝材片Ｚの各々を通過する磁束数を変化させて電磁誘導による渦電流を光輝材片Ｚに生じさせる。
The attitude adjustment of the glitter material piece Z will be described in further detail (see FIGS. 2 and 3). As described above, the
そして、この渦電流による形成磁界により光輝材片Ｚと周辺他物との間（具体的には、光輝材片Ｚどうしの間や、光輝材片Ｚと磁石４との間、また光輝材片Ｚと被塗物Ｗとの間など）に磁気的な斥力や引力の相互作用力を生じさせ、この相互作用力により未乾燥塗膜Ｍ中において光輝材片Ｚの姿勢を高い塗装仕上がり品質が得られる姿勢に変化させる。
Then, due to the magnetic field generated by this eddy current, between the bright material pieces Z and other peripheral objects (specifically, between the bright material pieces Z, between the bright material pieces Z and the
図２，図３は、この光輝材片Ｚの姿勢調整を模式的に示す図であり、図中における記号の意味は各図の傍らに記載した通りである。 2 and 3 are diagrams schematically showing the posture adjustment of the glittering material piece Z, and the meaning of the symbols in the drawings is as described beside each drawing.
つまり、図２のＡ部，Ｂ部，Ｃ部は夫々、塗膜形成時点での光輝材片Ｚの塗膜中分散パターン（即ち、未だ姿勢調整を行っていない光輝材片Ｚの状態）を例示しており、この状態において、磁石４を塗膜Ｍに対し近接状態で沿わせて移動させることにより、図中に示す如く光輝材片Ｚに渦電流が生じ、各々の光輝材片Ｚに磁極が生じる（換言すれば渦電流による磁界が形成される）。
That is, each of A part, B part, and C part in FIG. 2 shows the dispersion pattern in the paint film of the glitter material piece Z at the time of coating film formation (that is, the state of the glitter material piece Z that has not been subjected to posture adjustment yet). In this state, by moving the
そして、このように光輝材片Ｚの各々に磁極が生じる結果、図３に示す如く、光輝材片Ｚどうしの間や、光輝材片Ｚと磁石４との間、また光輝材片Ｚと被塗物Ｗとの間などに磁気的な斥力や引力が生じて光輝材片Ｚの姿勢変化が進み、高い塗装仕上がり品質が得られるようになる。
As a result of the magnetic poles generated in each of the bright material pieces Z in this way, as shown in FIG. 3, the bright material pieces Z, between the bright material pieces Z and the
なお、塗膜Ｍ中における光輝材片Ｚの姿勢を高い塗装仕上がり品質が得られる調整後の姿勢に適切に固定化する上で、上記の如き渦電流発生による光輝材片Ｚの姿勢調整は塗膜Ｍの乾燥速度を考慮しながら適切なタイミングで実行する必要がある。 In order to properly fix the position of the glitter material piece Z in the coating film M to the adjusted attitude that can obtain high coating finish quality, the adjustment of the attitude of the glitter material piece Z by the generation of the eddy current as described above is applied. It is necessary to execute at an appropriate timing in consideration of the drying speed of the film M.
次に、光輝材片Ｚとしてアルミニウム片を用いる場合において、上記の如く電磁誘導操作により塗膜Ｍ中の光輝材片Ｚに渦電流を生じさせることで光輝材片Ｚの姿勢を調整する本発明方法による塗装での塗装結果（実施例）と、この渦電流による姿勢調整を行わずにベルカップ回転速度の増加による塗料粒子の小径化やシェーピングエアの増量あるいは重ね塗り回数の増加による塗膜Ｍの薄膜化などの対策だけを採った塗装での塗装結果（比較例１，２）を図４に示す。 Next, in the case where an aluminum piece is used as the glitter material piece Z, the present invention adjusts the attitude of the glitter material piece Z by generating an eddy current in the glitter material piece Z in the coating film M by electromagnetic induction operation as described above. Results of coating by the method (Example), and coating film M by reducing paint particle diameter, increasing shaping air, or increasing the number of repeated coatings by increasing the bell cup rotation speed without adjusting the posture by this eddy current FIG. 4 shows the coating results (Comparative Examples 1 and 2) obtained by coating only by taking measures such as reducing the film thickness.
これらの塗装結果から分かるように、比較例１では塗着効率及び仕上がり品質（ＩＶ値：正面から見たときの白さの評価値）がともに低く、比較例２では仕上がり品質の向上は見られるものの塗着効率が大巾に低下し、また、これら比較例１，２はいずれも重ね塗り回数が多くなることで生産能率が低い。 As can be seen from these coating results, in Comparative Example 1, both the coating efficiency and the finished quality (IV value: evaluation value of whiteness when viewed from the front) are both low, and in Comparative Example 2, the finished quality is improved. However, the efficiency of the coating is greatly reduced, and both Comparative Examples 1 and 2 have a low production efficiency due to an increase in the number of repeated coatings.
比較例３は実施例と同じ条件で塗膜を形成した後、渦電流による姿勢調整だけを行わなかった場合の塗装結果を示すが、この比較例３では塗着効率が高く、また、重ね塗り回数が少ないことで生産能率は高いものの、仕上がり品質が低い。 Comparative Example 3 shows the coating results when the coating film was formed under the same conditions as in the Example and the posture adjustment by eddy current was not performed. In Comparative Example 3, the coating efficiency was high, and the overcoating was performed. Although the production efficiency is high due to the small number of times, the finished quality is low.
これら比較例１〜３に対し、本発明方法を用いた実施例では塗着効率及び仕上がり品質のいずれも高く、また、重ね塗り回数が少ないことで生産能率も高いものになっている。 In contrast to these comparative examples 1 to 3, in the examples using the method of the present invention, both the coating efficiency and the finished quality are high, and the production efficiency is high due to the small number of overcoating times.
〔別の実施形態〕
次に本発明の別実施形態を列記する。
本発明の実施において被塗物Ｗは自動車ボディ、バンパー等の自動車部品、家電製品など、どのようなものであってもよい。
[Another embodiment]
Next, other embodiments of the present invention will be listed.
In the implementation of the present invention, the object W to be coated may be any object such as an automobile body, an automobile part such as a bumper, or a home appliance.
上記の実施形態では、塗膜Ｍ中の常磁性光輝材片Ｚに渦電流を生じさせる電磁誘導操作として磁石４を塗膜Ｍの近傍で移動させる例を示したが、これに代えて、あるいは、これと組み合わせて、交流電流を通電しているコイルを塗膜Ｍの近傍で移動させたり、塗膜Ｍの近傍に設置したコイル又は塗膜Ｍの近傍で移動させるコイルにパルス状の直流電流を通電したり、また、磁石４や通電状態のコイルを塗膜Ｍの近傍で回転又は振動させたりするようにしてもよい。
In the above embodiment, the example in which the
前述の実施形態では、塗装装置１及び配向調整装置２として夫々、多関節ロボット型のものを例示したが、本発明の実施において塗装装置１や配向調整装置２は夫々、多関節ロボット型のものに限らず種々の形式・構造のものを採用でき、例えば、被塗物搬送経路の両側に立設した支柱間に可動アームを横架した門型の装置や、被塗物搬送経路の横側に設置した装置本体に上下方向や水平方向に揺動する可動アームを備えさせたもの、あるいは、多関節型以外のロボットなどを採用してもよい。 In the above-described embodiment, the articulated robot type is exemplified as the coating device 1 and the orientation adjusting device 2, respectively. However, in the implementation of the present invention, the painting device 1 and the orientation adjusting device 2 are each of the articulated robot type. Various types and structures can be used, for example, a gate-type device that has a movable arm horizontally mounted between columns that are erected on both sides of the object conveyance path, and the side of the object conveyance path Alternatively, a device provided with a movable arm that swings in the vertical direction and the horizontal direction, or a robot other than an articulated type may be employed.
また、塗装装置１と配向調整装置２とを部分的又は全体的に一体化した装置構成にしてもよい Moreover, you may make it the apparatus structure which integrated the coating apparatus 1 and the orientation adjustment apparatus 2 partially or entirely.
Ｚ 常磁性を示す光輝材片
Ｔ 塗料
Ｗ 被塗物
Ｍ 塗膜
４ 磁石
３ 塗装機
１ａ 可動アーム
１ 塗装装置
２ａ 可動アーム
２ 配向調整装置
Z A bright material piece showing paramagnetism T Paint W W
Claims (3)
塗料を吐出する塗装機を可動アームの先端に装備した塗装装置と、磁石又はコイルを可動アームの先端に装備した配向調整装置とを並置しておき、
常磁性を示す光輝材片を分散させた塗料を前記塗装機から吐出させながら前記塗装装置の可動アーム操作により前記塗装機を被塗物の表面に沿わせる状態に移動させて被塗物の表面に塗膜を形成し、
その後、この塗膜が乾燥する前に、前記電磁誘導操作として、前記磁石又は通電状態の前記コイルを前記配向調整装置の可動アーム操作により被塗物の塗膜に沿わせる状態に移動させて又は塗膜に沿わせる状態に移動させながら回転もしくは振動させて、塗膜中における光輝材片の姿勢を調整する塗装方法。 A coating film is formed on the surface of the object to be coated with a paint in which bright material pieces exhibiting paramagnetism are dispersed, and then, before this coating film is dried, eddy current is applied to the bright material pieces in the coating film by electromagnetic induction operation. The magnetic field generated by this eddy current generates a magnetic interaction force between each of the glitter material pieces and the surrounding other objects, and this interaction force causes the glitter material pieces to have a posture in the coating film. to be adjusted,
A coating device equipped with a coating machine that discharges paint at the tip of the movable arm and an orientation adjustment device equipped with a magnet or coil at the tip of the movable arm are juxtaposed,
The surface of the object to be coated is moved by moving the coating machine to a state along the surface of the object to be coated by operating the movable arm of the coating apparatus while discharging the paint in which the bright material pieces exhibiting paramagnetism are discharged from the coating machine. To form a coating film,
Then, before the coating film is dried, as the electromagnetic induction operation, the magnet or the coil in the energized state is moved to a state along the coating film of the object by the movable arm operation of the orientation adjusting device or A coating method that adjusts the position of the glittering material piece in the coating film by rotating or vibrating while moving it along the coating film .
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| JPS51137733A (en) * | 1975-05-26 | 1976-11-27 | Toyota Motor Corp | Method to form a pattern coating with pictures or letters |
| JPS56119938A (en) * | 1980-02-22 | 1981-09-19 | Sony Corp | Production of magnetic recording medium |
| JPS6387614A (en) * | 1986-09-30 | 1988-04-18 | Sony Corp | Production of magnetic recording medium |
| JPH08323947A (en) * | 1995-06-01 | 1996-12-10 | Dainippon Printing Co Ltd | Decorative material with patterned coating film and method for producing the decorative material |
| JP3806472B2 (en) * | 1996-11-18 | 2006-08-09 | 株式会社アドアップ | Thin film forming apparatus and thin film forming method |
| JP2005305247A (en) * | 2004-04-19 | 2005-11-04 | Toyota Industries Corp | Method and apparatus for flattening coating film |
| JP2007054820A (en) * | 2005-07-28 | 2007-03-08 | Kyodo Printing Co Ltd | Designable medium forming method and designable medium |
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