WO2016190270A1 - 静電噴霧装置用マスキング治具、そのマスキング治具を備える静電噴霧装置、及び、そのマスキング治具を用いた静電噴霧方法 - Google Patents

静電噴霧装置用マスキング治具、そのマスキング治具を備える静電噴霧装置、及び、そのマスキング治具を用いた静電噴霧方法 Download PDF

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Publication number
WO2016190270A1
WO2016190270A1 PCT/JP2016/065135 JP2016065135W WO2016190270A1 WO 2016190270 A1 WO2016190270 A1 WO 2016190270A1 JP 2016065135 W JP2016065135 W JP 2016065135W WO 2016190270 A1 WO2016190270 A1 WO 2016190270A1
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WO
WIPO (PCT)
Prior art keywords
masking
liquid
coated
auxiliary body
application part
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.)
Ceased
Application number
PCT/JP2016/065135
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English (en)
French (fr)
Japanese (ja)
Inventor
和昭 佐藤
翔志 柿崎
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Anest Iwata Corp
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Anest Iwata Corp
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Filing date
Publication date
Application filed by Anest Iwata Corp filed Critical Anest Iwata Corp
Publication of WO2016190270A1 publication Critical patent/WO2016190270A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/06—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in annular, tubular or hollow conical form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
    • B05B15/522—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using cleaning elements penetrating the discharge openings
    • B05B15/5223—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using cleaning elements penetrating the discharge openings the cleaning element, e.g. a needle, and the discharge opening being movable relative to each other in a direction substantially parallel to the flow of liquid or other fluent material through said opening
    • B05B15/5225—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using cleaning elements penetrating the discharge openings the cleaning element, e.g. a needle, and the discharge opening being movable relative to each other in a direction substantially parallel to the flow of liquid or other fluent material through said opening the cleaning element being located upstream of the discharge opening or being actuated upstream therefrom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/32—Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/043—Discharge apparatus, e.g. electrostatic spray guns using induction-charging

Definitions

  • the present invention relates to a masking jig for an electrostatic spray apparatus, an electrostatic spray apparatus provided with the masking jig, and an electrostatic spray method using the masking jig.
  • the thin film forming apparatus includes a nozzle that sprays a solution material in a state where a voltage is applied, and a mask that is disposed in the vicinity of the substrate between the nozzle and the substrate and includes an opening having a predetermined opening pattern. ing.
  • the solution material sprayed from the nozzle is deposited as a thin film on the substrate.
  • the opening of the mask has a nozzle side portion and a substrate side portion.
  • the nozzle side portion is configured to have an opening area larger than that of the substrate side portion.
  • the problem is that the transferability of the opening pattern of the mask is deteriorated by using the mask as described above, that is, the solution material causes electrostatic repulsion at the opening edge of the mask. It solves the problem of instability of the linearity of the solution material deposited along the edge of the opening as it moves toward the inside of the opening.
  • the solution material is less likely to cause electrostatic repulsion at the opening edge of the mask, and is deposited in the vicinity of the opening edge of the mask (hereinafter also referred to as a liquid).
  • a liquid deposited in the vicinity of the opening edge of the mask
  • the liquid deposited in the vicinity of the opening edge includes liquid that has been deposited by the liquid outside the opening being brought close to the opening side. There is also a problem that it tends to be thick.
  • An object of the present invention is to provide a masking jig for an electrostatic spraying device that can be suppressed. Moreover, it aims at providing the electrostatic spray apparatus provided with the masking jig
  • the present invention can be configured as follows.
  • a masking jig used in an electrostatic spraying device The electrostatic spraying device is configured to charge a liquid from the liquid spraying unit in a charged state by an electrostatic force generated by applying a voltage between the liquid spraying unit and a different polar part different from the liquid spraying unit. It is an electrostatic coating machine that detaches and sprays the atomized liquid on the workpiece.
  • the masking jig comprises a masking auxiliary body and a separate masking body
  • the masking auxiliary body has the same electric potential as the object to be coated, and demarcates a boundary between an application part that applies the atomized liquid of the object to be coated and a non-application part that does not apply the atomized liquid of the object to be coated.
  • Arranged as The masking body is arranged so as to cover at least the non-application part of the object to be coated that is not covered by the masking auxiliary body on the non-application part side of the boundary,
  • the masking body is formed to be in a charged state that repels the atomized liquid using an insulating material,
  • the masking auxiliary body can be applied with the liquid.
  • the masking auxiliary body may be disposed so as to contact the object to be coated.
  • the masking auxiliary body is a conductive material or an antistatic material having a surface resistance of 10 10 ⁇ or less so that the atomized liquid can be applied. And may have the same potential as the object to be coated.
  • the masking auxiliary body may be formed to a thickness of 0.25 mm or less using an insulating material so that the atomized liquid can be applied.
  • the masking auxiliary body can be detachably attached to the masking body.
  • the masking auxiliary body can be detachably attached to the object to be coated.
  • a masking jig used in an electrostatic spraying device The electrostatic spraying device is configured to charge a liquid from the liquid spraying unit in a charged state by an electrostatic force generated by applying a voltage between the liquid spraying unit and a different polar part different from the liquid spraying unit. It is an electrostatic coating machine that detaches and sprays the atomized liquid on the workpiece.
  • the masking jig includes a masking auxiliary body and a masking body,
  • the masking auxiliary body has the same electric potential as the object to be coated, and demarcates a boundary between an application part that applies the atomized liquid of the object to be coated and a non-application part that does not apply the atomized liquid of the object to be coated.
  • Arranged as The masking body is integrally provided so as not to be removable from the masking auxiliary body on the non-application part side of the boundary, and is disposed so as to cover at least the non-application part of the object to be coated that is not covered by the masking auxiliary body.
  • the masking body is formed using an insulating material so as to be charged to repel the atomized liquid
  • the masking auxiliary body may be formed using a conductive material or an antistatic material having a surface resistance of 10 10 ⁇ or less so that the atomized liquid is applied to the masking auxiliary body.
  • the masking auxiliary body may be disposed so as to contact the object to be coated.
  • the masking body may have a thickness greater than or equal to a predetermined thickness so as to be in a charged state that repels the atomized liquid.
  • the predetermined thickness of the masking body may be 0.5 mm or more.
  • the electrostatic spraying device may include a masking jig having any one of the configurations (1) to (10).
  • the liquid spraying unit is charged in a charged state by an electrostatic force generated by applying a voltage between the liquid spraying unit and a different polar part having a different polarity with respect to the liquid spraying unit.
  • an electrostatic spraying device that sprays the atomized liquid on the object to be coated, and a masking jig covering the non-coating portion where the liquid is not applied on the object to be coated.
  • An electrostatic spraying method for applying the liquid to an application part for applying a liquid wherein the masking jig defines a boundary between the application part and the non-application part, and the mask is more than the boundary.
  • a masking main body disposed on the non-application part side and provided so as to cover at least the non-application part of the object to be coated which is not covered by the masking auxiliary body.
  • the boundary between the application part that applies the liquid of the object to be coated and the non-application part that does not apply the liquid is accurately formed, and the thickness of the liquid applied in the vicinity of the boundary of the application part increases.
  • a masking jig for an electrostatic spraying device that can suppress this is provided.
  • tool are provided.
  • FIG.4 (a) is an enlarged view of the front end side of the liquid spray part of FIG. 3, and is a figure which shows the case where the front-end
  • FIG. 4B is an enlarged view of the tip side of the liquid spraying part of FIG. 3, and FIG.
  • FIG. 4B is a diagram showing a case where the tip of the mandrel is positioned forward of FIG. 4A. It is an exploded sectional view of the masking jig concerning a 1st embodiment of the present invention. It is a figure which shows the modification of the masking jig which concerns on 1st Embodiment of this invention, and is a figure which shows the masking jig which integrated the masking main body and the masking auxiliary body so that removal is impossible. It is a perspective view which shows the masking jig
  • FIG. 1 is a perspective view showing the overall configuration of the electrostatic spraying device 10 according to the first embodiment of the present invention
  • FIG. 2 is a cross-sectional view showing the overall configuration of the electrostatic spraying device 10.
  • the electrostatic spraying device 10 has a polarity different from the liquid spraying unit 20 having the liquid nozzle 22, the masking jig 30, the liquid spraying unit 20, and the liquid spraying unit 20.
  • Voltage application means (voltage power supply) 50 for applying a voltage to the different polarity part 40 is provided.
  • the case where the electrical wiring from the voltage application means (voltage power supply) 50 is directly connected to the object to be coated, and the object itself is used as the heteropolar portion 40 is shown.
  • an electrical wiring from a voltage applying means (voltage power source) 50 is connected to a placement portion (not shown) for placing the object to be coated, and this placement portion is used as a different pole portion 40.
  • the object to be coated may be electrically connected to the voltage applying means (voltage power source) 50 via
  • grounding means 60 The object to be coated which becomes the different pole portion 40 is grounded by the grounding means 60.
  • This grounding means 60 is not an essential requirement, but in the case of an object to be coated, it may be touched by an operator, so that it is preferably provided from the viewpoint of safety.
  • FIG. 3 is a cross-sectional view showing only the liquid spray unit 20.
  • the liquid spray unit 20 includes a body portion 21 made of an insulating material, a liquid nozzle 22, and a mandrel 23 made of a conductive material.
  • the body portion 21 is formed with a liquid flow path 21b having a liquid supply port 21a through which liquid is supplied.
  • the liquid nozzle 22 has a through hole.
  • the liquid nozzle 22 is provided at the tip of the body part 21 so that the through hole communicates with the liquid flow path 21 b of the body part 21.
  • the mandrel 23 is disposed in the liquid channel 21 b of the body portion 21 and in the through hole of the liquid nozzle 22.
  • the body portion 21 is provided with a hole portion 21c communicating with the liquid channel 21b in order to take out the mandrel 23 to the rear end side.
  • a seal member 24 is provided in the hole 21c.
  • the seal member 24 seals a gap between the seal member 24 and the mandrel 23 so that liquid does not leak.
  • an O-ring is used as the seal member 24.
  • the O-ring is not limited to the O-ring, and any member that can be sealed may be used.
  • pick part 23a which consists of an insulating material is provided in the rear end of the mandrel 23 located in the rear end side of the trunk
  • an electrical wiring connection portion 23b made of a conductive material is provided so as to penetrate substantially the center of the knob portion 23a.
  • the electrical wiring from the voltage applying means 50 is connected to the electrical wiring connection portion 23 b.
  • the mandrel 23 and the electric wiring connecting part 23 b are electrically connected by the electric wiring connecting part 23 b being in contact with the mandrel 23.
  • the mandrel 23 is used as an electrode on the liquid spray unit 20 side.
  • the liquid nozzle 22 of the liquid spray unit 20 is made of a conductive material, and the voltage applying means 50 is connected to the liquid nozzle 22.
  • the electrical wiring may be connected, and the liquid nozzle 22 may be an electrode on the liquid spray unit 20 side.
  • a female screw structure 21e for screwing and connecting the knob portion 23a is provided on the inner peripheral surface of the rear end opening 21d of the body portion 21.
  • a male screw structure 23c is provided on the outer peripheral surface of the tip of the knob 23a.
  • the mandrel 23 is detachably attached to the body part 21 by screwing the male screw structure 23c on the outer peripheral surface of the knob 23a into the female thread structure 21e of the rear end opening 21d of the body part 21. . Further, the mandrel 23 can be moved in the front-rear direction by adjusting the screwing amount of the knob 23a, and the position of the distal end surface 23d of the mandrel 23 can be adjusted in the front-rear direction.
  • the nozzle for spraying the liquid of the electrostatic spraying device is a fine liquid flow path in which the diameter of the through hole through which the liquid flows is small. This is presumably because a stable liquid atomization state cannot be obtained when the opening diameter of the nozzle tip from which the liquid flows is large.
  • the opening diameter of the nozzle tip is less than 0.1 mm.
  • the opening diameter of the opening 22b at the tip of the liquid nozzle 22 of this embodiment is a large opening diameter of 0.2 mm. As a result, the frequency of occurrence of clogging can be greatly reduced.
  • the opening diameter of the opening 22b of the liquid nozzle 22 is not limited to 0.2 mm, and in the embodiment using the mandrel 23, there is no problem even if the opening diameter is about 1 mm.
  • the opening diameter of the opening 22b of the liquid nozzle 22 is preferably 0.1 mm or more, more preferably 0.2 mm or more, and more preferably 0, considering that clogging is less likely to occur and cleaning is possible even when clogging occurs. It is preferable to make it larger than 2 mm.
  • the opening diameter of the opening 22b of the liquid nozzle 22 is preferably 1.0 mm or less, more preferably 0.8 mm or less, and even more preferably 0.5 mm or less, considering the atomization stability. Is good.
  • the mandrel 23 can be moved in the front-rear direction as described above, even if the clogging occurs in the opening 22b of the liquid nozzle 22, the mandrel within the opening 22b of the liquid nozzle 22 The clogging can be eliminated by moving 23. Furthermore, since the inner diameter of the through hole of the liquid nozzle 22 is also large enough to allow the mandrel 23 to be disposed, it is possible to remove the mandrel 23 and wash it by flowing a large amount of cleaning liquid.
  • FIG. 4 is an enlarged view in which the front end side of the liquid spray unit 20 is enlarged.
  • 4A shows a case where the distal end surface 23d of the mandrel 23 is located rearward
  • FIG. 4B shows a case where the distal end surface 23d of the mandrel 23 is located more forward than the state shown in FIG. 4A. It is.
  • the liquid nozzle 22 has a tapered inner diameter portion (see range A) having a taper angle ⁇ that becomes tapered toward the opening 22b.
  • the mandrel 23 has a tapered portion (see range B) having a taper angle ⁇ that decreases in outer diameter toward the distal end surface 23d.
  • the taper angle ⁇ of the tapered inner diameter portion of the liquid nozzle 22 is set larger than the taper angle ⁇ of the tapered portion of the mandrel 23.
  • the diameter of the front end surface 23d of the mandrel 23 is smaller than the diameter of the opening 22b of the liquid nozzle 22, but the diameter of the tapered portion of the mandrel 23 gradually increases toward the rear end side.
  • the liquid nozzle 22 is formed so as to have a portion having a diameter larger than the opening diameter of the opening 22 b of the liquid nozzle 22.
  • the mandrel 23 is moved in the front-rear direction as can be seen by comparing FIG. 4 (a) and FIG. 4 (b).
  • the width of the gap formed by the mandrel 22 and the mandrel 23 can be adjusted, and the amount of liquid exiting from the opening 22b of the liquid nozzle 22 can be adjusted.
  • the mandrel 23 contacts the inner peripheral surface of the liquid nozzle 22 and closes the opening 22 b of the liquid nozzle 22. Is possible. Therefore, it is possible to prevent the liquid in the liquid nozzle 22 from drying by closing the opening 22b of the liquid nozzle 22 with the mandrel 23 in a state where the liquid such as paint is not sprayed. Clogging can be suppressed.
  • the electrical wiring from the voltage applying means 50 is connected to the transport device.
  • the object to be coated may be electrically connected to the voltage application means 50 via the placement part, as it is connected to the placement part on which the object is placed.
  • the liquid supplied to the liquid supply port 21 a of the body part 21 is supplied to the tip side of the liquid nozzle 22, and the static electricity accompanying the voltage applied between the different pole part 40 (the object to be coated) and the mandrel 23. By force, it is pulled forward and disengages and atomizes forward.
  • the supply of the liquid only needs to be sequentially supplied with the amount of liquid lost from the liquid spraying part 20 by being consumed by spraying, and the opening 22b of the liquid nozzle 22 (more precisely, the opening 22b and There is no need to pump and supply the liquid at such a pressure that the liquid is ejected from the gap between the mandrel 23. In a state where the liquid is ejected vigorously, it may be impossible to atomize.
  • FIG. 3 shows that the electrostatic force that pulls the liquid forward balances the adhesion force due to the surface tension and viscosity on the distal end surface 23d of the mandrel 23 and the distal outer peripheral edge 22a of the liquid nozzle 22.
  • the tailor cone 80 in which the liquid supplied to the tip side of the liquid nozzle 22 has a conical shape at the tip is formed.
  • the tailor cone 80 is formed in a conical shape by separating the positive / negative charges in the liquid by the action of an electric field, and deforming the meniscus at the tip of the liquid nozzle 22 charged with an excess charge. Then, the liquid is pulled straight from the tip of the tailor cone 80 by electrostatic force, and then the liquid is sprayed over a wide range by electrostatic explosion.
  • the liquid to be sprayed that is, the liquid separated from the liquid nozzle 22 to become liquid particles has a drastically larger area in contact with the air than before the separation, and thus the vaporization of the solvent is promoted.
  • electrostatic repulsion electrostatic explosion
  • a mandrel 23 is provided in the liquid nozzle 22. If the mandrel 23 is not provided as in the conventional electrostatic spraying device, the liquid can be attached only to the tip outer peripheral edge 22 a of the liquid nozzle 22.
  • the liquid can be attached only to the outer peripheral edge 22a of the tip of the liquid nozzle 22, so that, for example, liquid can be applied vertically and horizontally to the liquid nozzle 22. Since the tailor cone 80 cannot be formed easily, or the tailor cone 80 itself cannot be maintained, the stability of the liquid particles separated from the liquid nozzle 22 (size, number, charged state, etc. of the particles) It is inferred that the liquid cannot be stably atomized as a result.
  • a mandrel 23 is disposed in the liquid nozzle 22. Therefore, the liquid adheres not only to the outer peripheral edge 22 a of the liquid nozzle 22 but also to the front end surface 23 d of the mandrel 23 in addition to the outer peripheral edge 22 a of the liquid nozzle 22. Accordingly, even if the opening diameter of the opening 22b of the liquid nozzle 22 is large, the tip end surface 23d of the mandrel 23 to which the liquid can adhere is present at the center of the opening 22b, so that a stable tailor cone 80 can be formed. It is considered that stable atomization of the liquid is possible.
  • the front end surface 23d of the mandrel 23 protrudes too far forward from the front outer peripheral edge 22a of the liquid nozzle 22 (that is, the front end surface of the opening 22b of the liquid nozzle 22), an electric field is unlikely to act on the liquid exiting from the liquid nozzle 22. .
  • the distal end surface 23d of the mandrel 23 is excessively retracted backward from the distal end surface of the opening 22b of the liquid nozzle 22, the state is the same as when there is no portion where the liquid can adhere to the central portion of the opening 22b.
  • the position of the distal end surface 23d of the mandrel 23 is the liquid nozzle in the front-rear direction along the central axis of the mandrel 23 with the liquid spraying state as a reference with respect to the distal end surface of the opening 22b of the liquid nozzle 22. It is preferable that it is located within 10 times the opening diameter of the opening 22b at the tip of 22. More preferably, the distal end surface 23d of the mandrel 23 is positioned within 5 times. Further, it is preferable that the distal end surface 23d of the mandrel 23 is located within 3 times.
  • the liquid exiting from the opening 22b of the liquid nozzle 22 is at the tip of the liquid nozzle 22. It comes out to be a hemisphere with a diameter of about 0.2 mm.
  • the tip of the mandrel 23 should be close to the liquid so that a conical tailor cone 80 can be formed by applying an electric field (electrostatic force) to the liquid coming out of the tip of the liquid nozzle 22. .
  • the liquid nozzle 22 be positioned within 2 mm forward (outward direction) from the front end surface of the opening 22b.
  • the tip of the mandrel 23 is located within 2 mm backward (in the retracting direction) from the tip surface of the opening 22b of the liquid nozzle 22 so as to affect the adhesion of the liquid.
  • the mandrel 23 by providing the mandrel 23, stable atomization of the liquid can be performed even if the opening diameter of the opening 22b of the liquid nozzle 22 is increased. For this reason, the opening diameter of the opening part 22b of the liquid nozzle 22 can be made into a large opening diameter which can suppress clogging. Moreover, since the opening diameter of the opening part 22b of the liquid nozzle 22 can be enlarged, the liquid nozzle 22 can be manufactured by machining.
  • the tip of the mandrel 23 is shown as a flat flat surface as the tip surface 23d.
  • the tip of the mandrel 23 is not necessarily a flat flat surface, and the stable tailor cone 80 is formed.
  • the tip of the mandrel 23 may be a curved surface protruding toward the front side, such as an R shape.
  • the liquid sprayed from the liquid spray unit 20 (liquid nozzle 22) in this way becomes an atomized liquid while repeating electrostatic explosion, and the atomized liquid is in a charged state. It is attracted to the (coating object) side by electrostatic force and applied to the coating object.
  • the masking jig 30 includes a masking body 31 using an insulating material and a masking auxiliary body 32.
  • the to-be-coated object comprises the different pole part 40, in describing the to-be-coated object, below, description is advanced using the same sign as a different pole part as the to-be-coated object 40. .
  • the masking auxiliary body 32 has a circular opening 32a through which the liquid sprayed in the center passes. That is, this embodiment illustrates the case where the liquid is applied in a circular pattern on the workpiece 40.
  • the masking auxiliary body 32 defines the boundary 43 between the application part 41 that applies the liquid of the object 40 and the non-application part 42 that does not apply the liquid of the object 40 at the same potential as the object 40. is doing. That is, in the masking jig 30, the masking auxiliary body 32 is arranged so as to demarcate the boundary 43 between the application part 41 and the non-application part 42. In this embodiment, as shown in FIG. The body 32 is disposed so as to contact the article to be coated 40.
  • the masking jig 30 of this embodiment includes a masking auxiliary body 32 and a masking body 31. It is a separate body from the masking body 31.
  • the masking body 31 has an opening 31a to which the masking auxiliary body 32 is detachably attached.
  • the masking auxiliary body 32 is detachably attached to the opening 31a.
  • the masking main body 31 is configured so as to be closer to the non-application part 42 side than the boundary 43, and at least the non-application part of the article 40 not covered with the masking auxiliary body 32. 42 is arranged on the workpiece 40 so as to cover 42. That is, in the masking jig 30, the masking main body 31 is a portion that is disposed so as to cover at least the non-application portion 42 of the object 40 that is not covered by the masking auxiliary body 32 on the non-application portion 42 side with respect to the boundary 43. ing.
  • the masking body 31 is made of an insulating material.
  • the masking body 31 is in the same charged state as the liquid sprayed on the surface by the electrostatic force generated by the voltage applied between the object to be coated 40 and the liquid spraying part 20 (that is, the liquid is charged to a positive charge).
  • the surface is charged with a positive charge, and when the liquid is charged with a negative charge, the surface is charged with a negative charge).
  • the predetermined thickness is preferably 0.5 mm or more, and more preferably 1.0 mm or more.
  • the masking body 31 is in a favorable charged state that easily repels the charged liquid, and the liquid is prevented or reduced from being coated on the masking body 31. can do. For this reason, it is possible to greatly reduce the number of times the masking body is cleaned.
  • the masking auxiliary body 32 is formed of a conductive material or an antistatic material having a surface resistance of 10 10 ⁇ or less so that the sprayed liquid can be applied to the masking auxiliary body 32.
  • the masking auxiliary body 32 since the masking auxiliary body 32 is disposed so as to contact the object to be coated 40, the masking auxiliary body 32 can be regarded as having the same potential as the object to be coated 40, that is, the masking auxiliary body 32 is electrically covered.
  • the coating 40 can be regarded as a part of the coating 40.
  • the sprayed liquid is not collected on the center side of the opening 32a of the masking auxiliary body 32 due to electrostatic repulsion, and the liquid sprayed on the masking auxiliary body 32 off the opening 32a is not masked auxiliary.
  • the liquid sprayed on the opening 32a is applied on the object 40 to be coated. Therefore, the liquid sprayed outside the opening 32a is applied to the application part 41 in the vicinity of the boundary 43 of the object 40, and the applied liquid is prevented from becoming thicker than other parts. Is done.
  • the liquid is not repelled at the edge of the opening 32a, the liquid is neatly applied up to the boundary 43, so that the boundary 43 between the non-application part 42 and the application part 41 can be accurately defined. It becomes possible to form.
  • the masking body 31 is exemplified as a flat plate, but the shape of the masking body 31 itself is arbitrary, and the shape of the plate matches the shape of the article 40 to be coated. You may form so that it may curve. Moreover, the thickness of the masking main body 31 may not be uniform, and it is sufficient that the masking main body 31 has a thickness capable of preventing and reducing the liquid from being applied.
  • the masking auxiliary body 32 is attached to the opening 31a of the masking main body 31 so that attachment or detachment is possible.
  • the masking body 32 is not provided with the opening 31a, and the masking auxiliary body 32 is provided on the outer peripheral edge 31b (see FIG. 1) outside the masking body 31. May be detachably attached.
  • the masking auxiliary body 32 may be detachably attached to both the opening 31a and the outer peripheral edge 31b.
  • the liquid is applied to the masking auxiliary body 32, only the masking auxiliary body 32 is removed and cleaned in such a form that it is detachably attached. It becomes possible to improve workability.
  • the masking auxiliary body 32 does not have to be detachably attached to the masking body 31. Therefore, for example, as shown in FIG. 6, the masking auxiliary body 32 and the masking main body 31 may be integrated so as not to be removable. Even if it does in this way, compared with the case where liquid can be applied to the entire masking jig, only the portion of the masking auxiliary body 32 needs to be partially cleaned, so that the working efficiency is greatly improved. It becomes possible.
  • the masking jig 30 in which the masking auxiliary body 32 and the masking main body 31 are integrated so as not to be removable is formed, for example, by two-color molding using a conductive plastic material and an insulating plastic material. It is possible. As another method, the masking auxiliary body 32 is made of a conductive material or an antistatic material having a surface resistance of 10 10 ⁇ or less, and insert molding using an insulating plastic material is used for the masking auxiliary body 32. The masking main body 31 integrated so as not to be removable may be formed.
  • the masking body 31 is configured so that the liquid is difficult to be applied from the viewpoint of liquid application, the liquid application is not completely prevented.
  • some liquid may be applied during the application operation, and the surrounding liquid may be applied when the application operation is completed and no electrostatic force is generated. .
  • the masking body 31 is exposed to a solvent or the like, it is preferable that the masking body 31 is formed using a material having excellent solvent resistance among insulating materials. Therefore, for the masking main body 31, for example, it is preferable to use a material having excellent solvent resistance such as polyethylene, polypropylene, polyphenylene sulfide, polyethylene terephthalate, or fluorine resin.
  • a material having excellent solvent resistance such as polyethylene, polypropylene, polyphenylene sulfide, polyethylene terephthalate, or fluorine resin.
  • the basic configuration (the liquid spraying portion 20, the different pole portion 40 (object to be coated) and the masking main body 31) is the same as that in the first embodiment, and the configuration of the masking auxiliary body 32 is different. .
  • FIG. 7 is a perspective view showing the masking jig 30 of the second embodiment
  • FIG. 8 is a cross-sectional view of the masking jig 30 of the second embodiment.
  • the object to be coated 40 is not shown.
  • the masking auxiliary body 32 has the same potential as the object to be coated 40, and the masking auxiliary body 32 is not covered.
  • the coating 40 and the peripheral edge 35 (see FIG. 7) of the opening 32a are in contact with each other.
  • the masking auxiliary body 32 of the second embodiment is formed as a thin film having an opening 32a.
  • the masking auxiliary body 32 is detachably attached to both the opening edge portion of the masking main body 31 and the object to be coated 40, for example, by giving adhesiveness to one surface.
  • the masking auxiliary body 32 is preferably formed of a conductive material or an antistatic material having a surface resistance of 10 10 ⁇ or less, but in the case of such a thin structure, an insulating material may be used. . When an insulating material is used for the masking auxiliary body 32, the thickness is reduced so that the liquid can be applied onto the masking auxiliary body 32.
  • the thickness of the masking body 31 should be less than half the preferred thickness, that is, 0.25 mm or less. More preferably, the thickness is preferably 0.2 mm or less, and more preferably 0.15 mm or less. By doing in this way, even if the masking auxiliary body 32 is an insulating material, the liquid is satisfactorily coated on the masking auxiliary body 32, that is, the charged liquid is not repelled. The same effects as those of the first embodiment can be obtained.
  • the masking auxiliary body 32 can be manufactured as a thin film at low cost as in the second embodiment, the masking auxiliary body 32 can be used in a disposable manner instead of being washed. Become.
  • the masking auxiliary body 32 is not formed using a mold, but the masking auxiliary body 32 is a film-like one as in the second embodiment. If a necessary opening 32a is made in accordance with the shape of the application part 41 of the object to be coated 40 (for example, it is cut out), it is necessary to make a mold or the like to produce the masking auxiliary body 32. It is possible to reduce the cost.
  • the masking auxiliary body 32 is provided on the outer peripheral edge 31b (see FIG. 7) of the masking body 31.
  • the masking auxiliary body 32 may be shaped like a tape because the masking auxiliary body 32 may be easier to use if the shape is a tape.
  • the masking auxiliary body 32 was attached to both the masking main body 31 and the to-be-coated object 40 so that the masking auxiliary body 32 passed between the masking main body 31 and the to-be-coated object 40 so that attachment or detachment was possible.
  • the masking auxiliary body 32 is detachably attached only to the object to be coated 40, and the masking body is placed on the masking auxiliary body 32 on the non-application part 42 side from the boundary 43 so as not to cover the application part 41.
  • the masking main body 31 may be provided so that the masking main body 31 covers the non-application portion 42 that is not covered by the masking auxiliary body 32 by arranging the layers 31 so as to overlap each other.
  • the masking jig 30 described in detail in the first embodiment and the second embodiment includes a masking auxiliary body 32 that demarcates a boundary 43 between the application part 41 and the non-application part 42 of the workpiece 40, and a boundary 43. And a masking main body 31 that is disposed on the non-application part 42 side and is provided so as to cover at least the non-application part 42 of the article 40 that is not covered by the masking auxiliary body 32. With such a masking jig 30, the liquid is applied to the application unit 41 that applies the liquid of the object 40 while covering the non-application part 42 where the liquid of the object 40 is not applied.
  • this invention was demonstrated based on specific embodiment, this invention is not limited to the said embodiment, You may implement a deformation
  • Electrostatic spraying device 20 Liquid spray part 21 Body part 21a Liquid supply port 21b Liquid flow path 21c Hole part 21d Rear end opening part 21e
  • Female thread structure 22 Liquid nozzle 22a Tip outer periphery 22b Opening part 23 Mandrel 23a Knob part 23b Electric wiring Connection part 23c Male thread structure 23d End face 24 Seal member 30 Masking jig 31 Masking body 31a Opening 31b Outer peripheral edge 32 Masking auxiliary body 32a Opening 35 Peripheral 40 Different pole part (object to be coated) 41 Application part 42 Non-application part 43 Boundary 50 Voltage application means 60 Grounding means 80 Tailor cone

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  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
PCT/JP2016/065135 2015-05-28 2016-05-23 静電噴霧装置用マスキング治具、そのマスキング治具を備える静電噴霧装置、及び、そのマスキング治具を用いた静電噴霧方法 Ceased WO2016190270A1 (ja)

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JP2015108454A JP6634645B2 (ja) 2015-05-28 2015-05-28 静電噴霧装置用マスキング治具、そのマスキング治具を備える静電噴霧装置、及び、そのマスキング治具を用いた静電噴霧方法
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CN116056805A (zh) * 2020-08-21 2023-05-02 Ａｇｃ株式会社 带涂膜的基板、涂膜形成方法以及带涂膜的基板的制造方法

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JP2019198851A (ja) * 2018-05-18 2019-11-21 アネスト岩田株式会社 マスキング治具
JP2020082039A (ja) * 2018-11-30 2020-06-04 アネスト岩田株式会社 マスキング治具及び静電噴霧装置

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JP2007229851A (ja) * 2006-02-28 2007-09-13 Institute Of Physical & Chemical Research マイクロパターン形成装置、マイクロパターン構造体、および、その製造方法
JP2009183810A (ja) * 2008-02-01 2009-08-20 Ibaraki Univ 静電作用を利用した塗装方法

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CN116056805A (zh) * 2020-08-21 2023-05-02 Ａｇｃ株式会社 带涂膜的基板、涂膜形成方法以及带涂膜的基板的制造方法
CN116056805B (zh) * 2020-08-21 2024-05-10 Ａｇｃ株式会社 带涂膜的基板、涂膜形成方法以及带涂膜的基板的制造方法

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