WO2016195044A1 - 塗装装置 - Google Patents
塗装装置 Download PDFInfo
- Publication number
- WO2016195044A1 WO2016195044A1 PCT/JP2016/066494 JP2016066494W WO2016195044A1 WO 2016195044 A1 WO2016195044 A1 WO 2016195044A1 JP 2016066494 W JP2016066494 W JP 2016066494W WO 2016195044 A1 WO2016195044 A1 WO 2016195044A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cup
- paint
- air
- peripheral edge
- outer peripheral
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member
- B05B3/1007—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member characterised by the rotating member
- B05B3/1014—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
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- 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
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- 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
- B05B1/12—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means capable of producing different kinds of discharge, e.g. either jet or spray
-
- 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
- B05B12/18—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area using fluids, e.g. gas streams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member
-
- 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
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
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- 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
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
- B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
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- 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
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0426—Means for supplying shaping gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
- B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
- B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
- B05B7/1272—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated actuated by gas involved in spraying, i.e. exiting the nozzle, e.g. as a spraying or jet shaping gas
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- 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
- B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
Definitions
- the present invention relates to a coating apparatus that blows coating air and sprays paint on a workpiece.
- a coating device rotating atomizing coating device
- This coating apparatus rotates a bell-shaped cup to discharge paint, and sprays shaping air toward the outer peripheral edge on the tip side of the cup, thereby atomizing the discharged paint and applying it to the workpiece.
- the jetting direction of the shaping air of this coating apparatus is set so as to be along the tangent line of the outer peripheral edge of the cup in a front view (see FIG. 2 of Japanese Patent No. 2600390).
- the paint discharged from the cup is likely to be scattered radially outside the coating apparatus due to the spread of the shaped air that has been ejected, and the coating area of the coating tends to increase. For this reason, for example, for a work having a narrow application range, the paint does not concentrate within the target range, and there is a disadvantage that the paint efficiency is reduced and the paint is wasted.
- the present invention has been made in order to solve the above-described problems, and with a simple configuration, coating that can satisfactorily suppress spreading of the paint due to shaping air and improve the efficiency of applying the paint to a workpiece.
- An object is to provide an apparatus.
- the present invention provides a bell-shaped cup for discharging paint, a casing for rotatably holding the cup, and an outer peripheral edge of the cup provided on the casing.
- a spraying device that is positioned radially outward and proximally, and that jets shaping air in the distal direction to discharge the discharged paint to a workpiece, the spraying port of the coating device
- the shaping air is ejected by tilting radially inward of the cup from the circumscribed tangent.
- the coating apparatus can suppress the spread of the paint due to the shaping air with a simple configuration that has a spout for injecting the shaping air inclined to the inner side in the radial direction of the cup with respect to the circumscribed tangent.
- the jet outlet causes the paint that pops out due to the centrifugal force accompanying the rotation of the cup to fly toward a narrow range in the tip direction of the coating apparatus by shaping air by inclining the jetting direction of the shaping air inward from the circumscribed tangent. be able to.
- the coating apparatus can improve the coating efficiency of the paint on the work. For example, the paint can be applied in a concentrated manner on the work having a narrow application range, and the waste of the paint can be greatly suppressed.
- the jet outlet has an inclination angle in the jet direction of the shaping air with respect to an intersection tangent passing through the intersection of the jet direction of the shaping air and the outer peripheral edge of the cup is 30 ° or less. It is good to set within the range.
- the actual jet flight direction can be satisfactorily narrowed by setting the inclination angle of the jet direction of the shaping air within the range of 30 ° or less.
- the ejection port is configured to set the ejection direction of the shaping air to the outside of the front end side outer peripheral edge in the front view in a range from the jet outlet to the front end outer peripheral edge in a side view of the coating apparatus. It is preferable to do.
- the jet outlet sets the shaping air in the range from the jet outlet to the outer peripheral edge of the tip side so that the shaping air is ejected outside the outer peripheral edge of the tip side, thereby allowing the shaping air to flow more than the outer peripheral edge of the cup. It can flow sufficiently to the tip side. Therefore, the coating apparatus can narrow down the flying direction of the coating material better.
- the housing has an adjustment outlet for discharging adjustment air for adjusting the flight state of the paint on the radially inner side and the base end side of the outer peripheral edge on the front end side in the front view.
- the coating apparatus can eject the adjustment air from the adjustment outlet, so that the paint can be blown so as to spread outward in the radial direction of the cup, and the degree of freedom of the application range of the paint can be increased. .
- the coating apparatus can satisfactorily suppress the spread of the paint due to shaping air and improve the efficiency of applying the paint to the workpiece.
- FIG. 5A is an enlarged front view showing the flight direction of the paint in the coating apparatus of FIG. 1
- FIG. 5B is an enlarged front view showing the flight direction of the paint in the conventional coating apparatus.
- a coating apparatus 10 is a rotary atomization type having a bell-shaped cup 12 that discharges paint and a casing 14 that rotatably holds the cup 12.
- the device is configured.
- the coating apparatus 10 ejects paint outward in the radial direction by centrifugal force when the cup 12 rotates, and also blows the paint in the tip direction by shaping air ejected from the housing 14 (work to be coated) (Fig. (Not shown).
- the coating apparatus 10 includes the casing 14, the air motor 16 provided in the casing 14, a shaft 18 rotated by the air motor 16, and the cup 12 provided at the tip of the shaft 18. And an air ejection part 20 that ejects shaping air.
- the housing 14 constitutes the main appearance of the coating apparatus 10 and is formed so as to exhibit a cylindrical shape as a whole.
- the casing 14 is formed to be tapered toward the distal end in a side sectional view, and an application portion for applying a paint is provided on the distal end side.
- the application part constitutes the air ejection part 20 by assembling a plurality of members, and further accommodates the air motor 16 and the shaft 18 inside thereof.
- the air motor 16 is provided so as to surround the outer side of the shaft 18 in the radial direction, and rotates the shaft 18 rotatably attached to the housing 14 by supplying compressed air from a compressed air source (not shown).
- the shaft 18 is formed in a hollow cylindrical shape and extends in the housing 14 in the axial direction, and a high voltage generator (not shown) is connected to the base end side thereof.
- the shaft 18 applies a negative high voltage supplied from a high voltage generator to the cup 12 on the tip side, charges the paint, and performs electrostatic coating.
- a tube member 22 is provided inside the shaft 18.
- the pipe member 22 is a hollow pipe extending in the axial direction about the central axis of the shaft 18 and has a paint supply path 24 and a cleaning liquid supply path 26 inside.
- the paint supply path 24 has a base end connected to a paint supply source (not shown), and causes the paint supplied from the paint supply source to flow in the distal direction.
- the base end side of the cleaning liquid supply path 26 is connected to a cleaning liquid supply source (not shown), and allows the cleaning liquid supplied from the cleaning liquid supply source to flow in the distal direction.
- the coating material supply path 24 and the cleaning liquid supply path 26 extend in parallel to a midway position in the distal direction of the tube member 22, and have a coaxial double structure on the distal end side of the tube member 22.
- a paint supply nozzle 25 that discharges the paint is provided at the distal end side of the tube member 22, and a cleaning liquid supply nozzle 27 that discharges the cleaning liquid is provided so as to surround the periphery of the paint supply nozzle 25.
- the cup 12 constituting the coating unit of the coating apparatus 10 is fixed to the tip of the shaft 18, and rotates together with the shaft 18 when the shaft 18 rotates under the drive of the air motor 16.
- the cup 12 has an inner member 28 that surrounds the periphery of the paint supply nozzle 25 and the cleaning liquid supply nozzle 27 of the shaft 18 in a side sectional view, and an inner member 28 that is accommodated therein and has a bell shape that expands toward the distal end.
- the outer member 30 is provided.
- the inner member 28 is formed in a substantially disk shape, and is disposed on the proximal end side with respect to the distal end surface 46a of the housing 14 in a side sectional view. Inside the inner member 28 is provided a reservoir 32 for temporarily storing the paint or cleaning liquid supplied from the paint supply path 24 or the cleaning liquid supply path 26.
- the reservoir 32 is formed in a circular space in front sectional view, and a plurality of discharge holes 34 for discharging paint are provided in the wall portion of the inner member 28 constituting the reservoir 32. These discharge holes 34 are formed through the reservoir portion 32 on the front surface and the side peripheral surface of the inner member 28, respectively, and allow the paint supplied to the reservoir portion 32 to flow out.
- the outer member 30 is formed so as to spread from the inner member 28 in the distal direction and radially outward, and has a hollow portion 36 through which paint can flow.
- an opening 36 a that communicates with the cavity 36 and can discharge paint is formed.
- the outer peripheral edge 38 on the front end side of the outer member 30 surrounding the opening 36 a is located in the front end direction with respect to the front end surface 46 a of the housing 14.
- the inner surface of the outer member 30 constituting the hollow portion 36 is formed into a smooth surface that can flow the paint radially outward in a side sectional view. Further, the inner surface in the vicinity of the opening 36 a is a curved surface that curves at a steep angle toward the radially outer side of the outer member 30. Therefore, the coating material discharged from the discharge hole 34 of the inner member 28 flows on the inner surface by the centrifugal force accompanying the rotation of the cup 12, and the rotation direction of the cup 12 and the protruding direction radially outward from the opening 36 a of the cup 12 ( Jump to FIG. 5A).
- the air ejection part 20 of the coating apparatus 10 is provided in a housing 14 surrounding the cup 12.
- the air ejection portion 20 includes a plurality of ejection holes 40 through which the shaping air is ejected on the distal end surface 46 a of the housing 14.
- the plurality of ejection holes 40 form two ring-shaped groups (a group of ejection holes) at different locations in the radial direction of the housing 14. Specifically, in the front view shown in FIG. 2, the plurality of first ejection holes 42 positioned radially outward from the distal outer peripheral edge 38 of the outer member 30 and the radial direction from the distal outer peripheral edge 38 of the cup 12. And a second ejection hole 44 located inside.
- the plurality of first ejection holes 42 are provided at equal intervals along the circumferential direction of the housing 14 to constitute the first ejection hole group 43, and the plurality of second ejection holes 44 are the first ejection hole group 43. Are provided at equal intervals along the circumferential direction of the housing 14 to constitute the second ejection hole group 45.
- the first ejection hole 42 penetrates through the end wall 46 of the housing 14, the first distal end opening 42 a (jet outlet) of the distal end surface 46 a of the end wall 46, and the proximal end surface of the end wall 46.
- the first base end opening 42b of 46b is communicated.
- the second ejection hole 44 also passes through the end wall 46 of the housing 14, and the second distal end opening 44 a (adjusting ejection port) of the distal end surface 46 a of the end wall 46 and the second base of the proximal end surface 46 b of the end wall 46.
- the end opening 44b communicates with the end opening 44b.
- the air ejection part 20 has a first air chamber 48 and a first air supply path 50 communicating with the first ejection hole 42 in the housing 14 and a second air chamber 52 communicating with the second ejection hole 44. And a second air supply path 54 in the housing 14.
- the first air chamber 48 is formed in a ring-shaped space along the circumferential direction on the base end face side of the end wall 46 of the housing 14.
- the first air chamber 48 temporarily accumulates air supplied from the first air supply path 50 and allows the air to flow into the plurality of first ejection holes 42.
- the second air chamber 52 is formed in a ring-shaped space along the circumferential direction of the housing 14 on the proximal end surface side of the end wall 46 of the housing 14 and inside the first air chamber 48.
- the second air chamber 52 temporarily accumulates air supplied from the second air supply path 54 and allows the air to flow into the plurality of second ejection holes 44.
- the first and second air supply paths 50 and 54 are respectively connected to an air supply source (not shown), and flow the air whose supply amount is controlled by each air supply source to the first and second air chambers 48 and 52.
- the air ejection part 20 has a function of flying the paint onto the workpiece by the shaping air of the first ejection hole group 43 and adjusting the application state of the paint by the shaping air of the second ejection hole group 45.
- the shaping air of the second ejection hole group 45 is referred to as adjustment air.
- the air ejection unit 20 supplies a large amount of air from the first air supply path 50 during application of the paint, and receives shaping air from the first tip opening 42a via the first air chamber 48 and the first ejection hole 42. Large amount and high speed.
- the air ejection unit 20 supplies air set to an appropriate supply amount to the second air supply path 54 according to the necessity of spreading and applying the paint, and the second air chamber 52 and the second ejection. Adjustment air is appropriately ejected from the second tip opening 44a through the hole 44.
- the coating apparatus 10 sets the ejection direction of the shaping air ejected from the first tip opening 42a by the first ejection hole 42. That is, in the side cross-sectional view shown in FIG. 1, the first ejection hole 42 extending in the end wall 46 is inclined from the radially outer side to the radially inner side toward the distal direction, so that the first distal end opening 42a is formed in the first base. It arrange
- the extension line L1 of the axial center of the first ejection hole 42 which is the ejection direction of the shaping air, is set so as to pass slightly outside in the radial direction with respect to the outer peripheral edge 38 on the front end side of the cup 12 (outer member 30).
- the second ejection holes 44 are slightly inclined from the radially inner side to the radially outer side in the end wall 46 toward the distal end direction. Therefore, the extension line L2 (shaping air ejection direction) of the axis of the second ejection hole 44 passes slightly outside in the radial direction with respect to the outer peripheral edge 38 on the tip end side of the cup 12.
- the first ejection hole 42 is shifted from the first distal end opening 42a and the first proximal end opening 42b by several degrees along the circumferential direction in the front view shown in FIGS. It is inclined diagonally in the end wall 46 so that it does not become.
- a circumferential direction in which the first distal end opening 42a is displaced from the first proximal end opening 42b is a clockwise direction opposite to the counterclockwise direction that is the rotation direction of the cup 12.
- the 1st ejection hole 42 ejects shaping air from the 1st front-end
- the ejection direction of the shaping air set by the first ejection hole 42 is based on a circumscribed tangent line T that is virtually drawn so as to circumscribe the distal end side outer peripheral edge 38 of the cup 12 from the first distal end opening 42a. Is also tilted inward. Further, the inclination angle ⁇ of the shaping air ejection direction with respect to the intersection tangent line C passing through the intersection of the shaping air ejection direction (extension line L1) and the distal end side outer peripheral edge 38 is set in a range of 0 ° ⁇ ⁇ 30 °. Good.
- the first ejection hole group 43 has the same inclination angle ⁇ in the ejection direction of each first ejection hole 42, and each first tip opening 42a ejects the shaping air evenly.
- the first ejection hole 42 has an ejection direction inclined obliquely toward the circumferential direction of the housing 14. That is, by inclining at an inclination angle ⁇ with respect to the axial direction of the housing 14, the shaping air is ejected obliquely from the first tip opening 42a. In other words, the first ejection holes 42 eject the shaping air in the tip direction and the twist direction.
- the inclination angle ⁇ in the ejection direction with respect to the axial direction of the housing 14 may be set in a range of 30 ° ⁇ ⁇ ⁇ 70 °, for example.
- the first ejection hole 42 overlaps with the outer peripheral edge 38 on the front end side of the cup 12 in a side view even when the first ejection hole 42 is ejected inwardly from the circumscribing tangent line T in a front view.
- the ejection direction of the shaping air can be set on the outer side in the radial direction from the outer peripheral edge 38 on the tip side.
- the first ejection hole 42 can eject the shaping air so as to be closer to the inner side than the front end side outer peripheral edge 38 of the cup 12 after passing the front end side outer peripheral edge 38 of the cup 12.
- the 1st front end opening 42a may eject shaping air in the ejection direction which approaches the inner side rather than the front end side outer periphery 38 by front view. In this case, although the flow force of the shaping air on the tip end side of the cup 12 is weakened, a part of the shaping air flows without interfering with the cup 12, so that the paint is narrowed inward as described above to fly. Can do.
- the coating apparatus 10 according to the present embodiment is basically configured as described above, and the effects thereof will be described below.
- the coating apparatus 10 applies a high voltage to the shaft 18 when coating the workpiece, and supplies the compressed air to the air motor 16 to rotate the shaft 18 at a high speed. Rotate counterclockwise.
- the coating apparatus 10 supplies the paint from the paint supply nozzle 25 toward the reservoir 32 of the cup 12.
- the coating material supplied to the reservoir portion 32 is discharged from the discharge hole 34 of the inner member 28 to the cavity portion 36 and the inner surface of the outer member 30 by the supply pressure and the rotation of the cup 12.
- the paint When the paint is discharged from the discharge hole 34, the paint flies in the front end direction due to the negative pressure of the shaping air sprayed around, and also flows radially outward (centrifugal direction) on the inner surface of the outer member 30. Then, the paint that has flowed on the inner surface of the outer member 30 jumps out in the counterclockwise rotational direction of the cup 12 and the radially outward popping direction from the outer peripheral edge 38 of the cup 12 as indicated by the one-dot chain line vector in FIG. 5A. .
- the air ejection unit 20 of the coating apparatus 10 supplies air from an air supply source, and shapes from the first tip opening 42 a of the first ejection hole 42 via the first air supply path 50 and the first air chamber 48. Air is spouted out.
- the first tip opening 42a ejects shaping air inwardly from the circumscribing line T circumscribing the tip side outer peripheral edge 38 of the cup 12 from the first tip opening 42a (see FIG. 3). . That is, the ejection direction of the shaping air is inclined inward by an inclination angle ⁇ (> 0 °) with respect to the intersection tangent C, as indicated by a two-dot chain line vector in FIG. 5A.
- the shaping air is ejected from the first tip opening 42a toward the tip direction so as to be twisted in the circumferential direction while moving toward the cup 12 side (see also FIGS. 3 and 4). At this time, since the shaping air passes outside the distal end side outer peripheral edge 38 of the cup 12 up to the position P shown in FIG.
- the conventional coating apparatus 100 matches the direction in which the shaping air is ejected with a circumscribed tangent line T circumscribing the outer peripheral edge 106 of the cup 104 from the ejection port 102 as indicated by a two-dot chain line vector shown in FIG. 5B.
- the paint that has received centrifugal force with the rotation of the cup 12 causes the distal outer peripheral edge to be ejected by the jumping force indicated by the one-dot chain line vector. Jump out of 106.
- the shaping air acts on the paint and blows away the paint, as indicated by a two-dot chain line vector.
- the actual flight direction of the paint is a direction that largely deviates to the outside of the coating apparatus 100 (see the bold line vector). That is, in the conventional coating apparatus 100, the paint that jumps out from the outer peripheral edge 106 at the front end side is spread outward by the shaping air, and if the paint is applied in a narrow range, the paint is wasted.
- the coating apparatus 10 can draw the paint that jumps out in the centrifugal direction from the outer peripheral edge 38 of the outer member 30 by ejecting the shaping air as described above. That is, as shown in FIG. 5A, when the intersection of the shaping air vector and the outer peripheral edge 38 of the tip end of the cup 12 is used as a base point, the shaping air protrudes as shown in FIG. It acts on the paint of the force and imparts a counter force so as to bring it inward in the radial direction. As a result, the coating apparatus 10 can set the actual flight direction of the paint to a direction narrowed inward in the radial direction of the housing 14 (refer to a bold line vector), and efficiently apply the paint in a narrow range. Can do.
- the coating air is ejected from the second tip opening 44a of the second ejection hole 44 to the tip direction and radially outward.
- a vector spreading radially outward is added to the vector of the shaping air from the first tip opening 42a, and the paint can be spread on the radially outer side of the cup 12 and applied to the workpiece.
- the coating apparatus 10 has the first tip opening 42a that inclines radially inward from the circumscribing tangent line T and ejects the shaping air, so that the paint can be easily scattered by the shaping air. Can be suppressed. That is, with a simple configuration in which the ejection direction of the shaping air is inclined inward from the circumscribing tangent line T, the shaping air ejected from the first tip opening 42a is a paint discharged by the centrifugal force accompanying the rotation of the cup 12. It is possible to fly in the tip direction while suppressing the spread. As a result, the coating apparatus 10 can improve the coating efficiency of the paint, and, for example, can concentrate and apply the paint to a work having a narrow application range.
- the coating apparatus 10 can further narrow the actual flight direction of the paint by setting the inclination angle ⁇ in the ejection direction of the shaping air within a range of 30 ° or less.
- the first tip opening 42a is configured such that the shaping air is set to the outside of the tip side outer peripheral edge 38 in the range up to the tip side outer peripheral edge 38 in a side view, so that the shaping air is set to the tip side of the cup 12. It can be made to flow sufficiently to the tip side from the outer peripheral edge 38. Therefore, the coating apparatus 10 can narrow the flight direction of the paint more favorably.
- the coating apparatus 10 can also blow the paint so as to spread outward in the radial direction of the cup 12 by ejecting the adjustment air from the second tip opening 44a, thereby increasing the degree of freedom of the paint application range. it can.
- the coating apparatus 10 sets the ejection direction of the shaping air based on the shape of the first ejection hole 42, but is not limited thereto, and the ejection direction of the shaping air from the ejection port is set by various methods. It's okay.
- a ring-shaped spout is formed along the circumferential direction of the casing 14, and shaping air is spirally flowed in the casing 14 and rectified so as to incline toward the distal end and radially inward of the cup 12. A configuration in which the shaped air is ejected from the ejection port can be given.
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- Electrostatic Spraying Apparatus (AREA)
- Nozzles (AREA)
Abstract
Description
Claims (4)
- 塗料を吐出するベル状のカップ(12)と、
前記カップ(12)を回転自在に保持する筐体(14)と、
前記筐体(14)に設けられ、前記カップ(12)の先端側外周縁(38)の径方向外側且つ基端側に位置し、シェーピングエアを先端方向に噴出して吐出された前記塗料をワークに飛ばす噴出口(42a)と、を備える塗装装置(10)であって、
前記噴出口(42a)は、前記塗装装置(10)の正面視で、前記噴出口(42a)から前記カップ(12)の先端側外周縁(38)に外接する外接接線を引いた場合に、前記外接接線よりも前記カップ(12)の径方向内側に傾いて前記シェーピングエアを噴出する
ことを特徴とする塗装装置(10)。 - 請求項1記載の塗装装置(10)において、
前記噴出口(42a)は、前記正面視で、前記シェーピングエアの噴出方向と前記カップ(12)の先端側外周縁(38)との交点を通る交点接線に対する前記シェーピングエアの噴出方向の傾斜角度(α)が、30°以下の範囲内に設定されている
ことを特徴とする塗装装置(10)。 - 請求項1又は2記載の塗装装置(10)において、
前記噴出口(42a)は、前記塗装装置(10)の側面視における該噴出口(42a)から前記先端側外周縁(38)までの範囲において、前記正面視で、前記シェーピングエアの噴出方向を該先端側外周縁(38)よりも外側に設定する
ことを特徴とする塗装装置(10)。 - 請求項1~3のいずれか1項に記載の塗装装置(10)において、
前記筐体(14)は、前記正面視で、前記先端側外周縁(38)の径方向内側且つ基端側に前記塗料の飛行状態を調整する調整用エアを噴出する調整用噴出口(44a)を有する
ことを特徴とする塗装装置(10)。
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| JP2017522263A JP6467505B2 (ja) | 2015-06-03 | 2016-06-02 | 塗装装置 |
| CA2988061A CA2988061C (en) | 2015-06-03 | 2016-06-02 | Painting device |
| CN201680032674.7A CN107614118B (zh) | 2015-06-03 | 2016-06-02 | 涂装装置 |
| US15/578,284 US10343179B2 (en) | 2015-06-03 | 2016-06-02 | Painting device |
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| JP2015112988 | 2015-06-03 | ||
| JP2015-112988 | 2015-06-03 |
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| WO2016195044A1 true WO2016195044A1 (ja) | 2016-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2016/066494 Ceased WO2016195044A1 (ja) | 2015-06-03 | 2016-06-02 | 塗装装置 |
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|---|---|
| US (1) | US10343179B2 (ja) |
| JP (1) | JP6467505B2 (ja) |
| CN (1) | CN107614118B (ja) |
| CA (1) | CA2988061C (ja) |
| WO (1) | WO2016195044A1 (ja) |
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| JP2022183053A (ja) * | 2021-05-28 | 2022-12-08 | グラコ ミネソタ インコーポレーテッド | 回転式噴霧器のシェーピングエア構成、及びエアキャップ装置 |
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| KR101634298B1 (ko) * | 2016-01-20 | 2016-06-30 | 박상은 | 더블 벨컵 |
| JP7220730B2 (ja) * | 2021-01-15 | 2023-02-10 | 本田技研工業株式会社 | 回転霧化式塗装装置 |
| US12420296B2 (en) * | 2021-10-06 | 2025-09-23 | Ford Motor Company | Ultrasonic atomizer for applying a coating to a substrate with electrostatic charge to prevent droplet coalescence during atomization |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20180141061A1 (en) | 2018-05-24 |
| CA2988061C (en) | 2020-04-21 |
| JPWO2016195044A1 (ja) | 2017-11-24 |
| CN107614118B (zh) | 2019-11-12 |
| CN107614118A (zh) | 2018-01-19 |
| JP6467505B2 (ja) | 2019-02-13 |
| US10343179B2 (en) | 2019-07-09 |
| CA2988061A1 (en) | 2016-12-08 |
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