WO2005042170A1 - スプレー塗装装置および塗装方法 - Google Patents
スプレー塗装装置および塗装方法 Download PDFInfo
- Publication number
- WO2005042170A1 WO2005042170A1 PCT/JP2004/016090 JP2004016090W WO2005042170A1 WO 2005042170 A1 WO2005042170 A1 WO 2005042170A1 JP 2004016090 W JP2004016090 W JP 2004016090W WO 2005042170 A1 WO2005042170 A1 WO 2005042170A1
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- WO
- WIPO (PCT)
- Prior art keywords
- air
- coating
- adapter
- spray
- paint
- Prior art date
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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
- 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
- B05B5/001—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means incorporating means for heating or cooling, e.g. the material to be sprayed
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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
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/10—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to temperature or viscosity of liquid or other fluent material discharged
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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
- B05B16/00—Spray booths
-
- 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
- B05B5/053—Arrangements for supplying power, e.g. charging power
- B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes
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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
- B05B7/16—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 incorporating means for heating or cooling the material to be sprayed
Definitions
- the present invention relates to an atomization spray coating apparatus and a coating method used for automotive coating, building exterior coating, and the like, and particularly to a drastic reduction in air conditioning energy in spray coating, prevention of paint scattering, and improvement of coating rate. .
- an air flow is formed that deflects paint particles atomized by spraying in the direction of the object to be coated, to prevent paint from scattering, and to adjust the temperature and humidity of supplied air.
- Attempts have been made to reduce the air-conditioning of booth rooms by promoting air conditioning and promoting the volatilization of solvents such as water in the paint.
- Patent Document 1 in an electrostatic coating method in which a paint is sprayed using a rotary atomizing coating machine equipped with an external electrode, the direction of movement of the spray paint particles to the object to be coated is substantially the same.
- a device has been proposed which supplies air of controlled temperature and humidity around the pattern so as to be in the same direction and to come into contact with the spray paint particle pattern from behind the paint jet port.
- the original excellent appearance (aluminum orientation, smoothness, etc.) of the rotary atomizing coating machine is improved even when the booth is in a low temperature and high humidity state. It can be finished in a good orientation.
- the coating efficiency of the coating by the rotary atomizing coating machine can be greatly improved, and dirt on the coating machine and the external electrodes due to spraying and back-flow of the coating particles can be reduced.
- the air supplied to the outer periphery of the spray paint particle pattern (referred to as shield air) is substantially the same as the direction in which the spray paint particles move to the object. Since it is supplied in the direction, it is impossible to prevent disturbance of the paint pattern!
- the temperature adjustment air capable of adjusting the temperature is supplied around the compressed air, the outside air induced flow enters the compressed air as shield air. Therefore, it is possible to prevent the temperature of the compressed air from drastically lowering based on the outside air induced flow, and prevent the ratio of the solid component in the supplied paint from changing.
- the temperature adjusting air itself adjusts the temperature of the compressed air by itself based on the temperature adjusting function, thereby adjusting the proportion of the solid component in the supplied paint through the compressed air to an appropriate level. Will also be performed. For this reason, even if the coating booth temperature is not kept constant, the presence of the temperature adjusting air can prevent deterioration of the coating finish of the object to be coated based on the induced flow.
- Patent Document 3 air having a higher temperature and a lower humidity than the coating atmosphere is blown toward the spray paint flow which is sprayed on the spraying device by the spray device.
- a method has been proposed in which painting is performed while forcibly spraying with air pressure that does not disturb.
- the high-temperature and low-humidity air enters into the flow of the paint scattered in the form of a mist, and therefore, the volatile components in the paint scattered between the spray gun and the non-painted object are effectively volatilized. As a result, defects such as sagging and flow during coating do not occur.
- Patent Document 3 JP-A-2000-325860
- Patent Document 2 JP-A-9-225350
- Patent Document 3 JP-A-51-63839
- the present invention provides a paint butter by forming an air flow such that the amount of air supplied to the spray spray paint flow and the blowing angle do not affect the atomization pattern of the paint.
- a coating device and method that can significantly reduce the air-conditioning energy of the coating booth, prevent paint scattering, and improve coating efficiency without disturbing the airflow, temperature, and humidity of the conventional coating booth. To provide.
- a coating apparatus for forming a coating film on the spray nozzle comprising a first adapter which is provided substantially concentrically with the spray nozzle and blows air in a spray direction of the spray nozzle, wherein the first adapter is provided with the introduced air.
- a spray coating apparatus wherein the air is blown at a blowing angle inclined toward the circumferential direction to cover the outer periphery of the coating pattern near the spray nozzle with the air.
- the painting pattern means a shape formed by the paint particles ejected from the ejection nozzle.
- the air introduced into the first adapter is inclined in the circumferential direction. Since the blowout is given at a blowout angle, it is blown out toward the oblique circumferential direction of the paint pattern in the form of so-called twisted air that is twisted in the circumferential direction inclined to the paint pattern sprayed from the spray nozzle. Will be. As a result, the blown air (twisted air) covers the outer periphery of the paint pattern near the spray nozzle without disturbing the paint pattern, and can prevent the paint from scattering near the spray nozzle.
- the temperature and humidity of the atmosphere in the coating pattern can be controlled, so that a paint composed of paint particles and volatile components such as an organic solvent and water is sprayed.
- the evaporation rate of volatile components (organic solvent, water, etc.) from the sprayed paint particles can be adjusted, and the coating viscosity of the paint particles can be controlled.
- the method of using the blown air as torsion air is not particularly limited, and examples thereof include the following.
- an air inlet for introducing air along the direction of the injection nozzle and an air outlet for blowing out the introduced air are provided in the cylindrical first adapter, and the air inlet force is also applied to the inner wall surface of the first adapter.
- a guide vane is provided in a movable manner inside the cylindrical first adapter to partition the inside, and the guide vanes are arranged in a substantially spiral shape to blow out air. May be. In this case, it is preferable to adjust the angle of the guide vane to change the angle at which the torsion air is blown out.
- the temperature, humidity, and the like of the air blown out from the first adapter may be controlled. This control is performed by, for example, connecting an air generator or the like having a function of adjusting temperature, humidity, air volume, etc. to the air inlet of the first adapter and supplying the air generated by the air generator. May be.
- the air of this air generator may be used as shaving air that is sprayed from around the spray nozzle of the coating machine body.
- the first adapter 1 has an air guide portion formed of a double cylinder, air inlets and air outlets formed at both ends of the air guide portion, and an inner periphery of the air guide portion.
- the spray coating device according to (1) further comprising a plurality of spiral grooves formed on a surface toward the air inlet force toward the air outlet.
- the air inlet force of the first adapter is introduced into the spiral groove formed on the inner peripheral surface of the air guiding section, and is blown out from the air outlet.
- the discharged air is torsion air which is directed in the circumferential direction of the coating pattern.
- the air blown out from the first adapter becomes so-called torsion air, which can more effectively cover the paint pattern without disturbing the paint pattern in which the paint and the shaping air force are generated.
- the angle at which the torsion air is blown out can be changed by changing the inclination angle of a spiral groove formed on the inner peripheral surface of the air guide portion. This blowing angle can be changed by replacing the first adapter with a different spiral groove inclination angle.
- the first adapter is characterized in that the first adapter is divided into a plurality in the direction of the air inlet force and the air outlet, and each of the first adapters is rotatable in a circumferential direction. ).
- turning in the circumferential direction means turning along the circumference of the cylindrical casing.
- the first adapter 1 is divided into at least two or more parts, and each of the divided parts is rotatable in the circumferential direction, so that the air formed on the inner peripheral surface is removed.
- the shape of the bellows-like groove to be guided can be adjusted.
- the first adapter 1 is a hollow cylindrical body, and a plurality of air formed in the cylindrical body at a predetermined angle from the air inlet to the air outlet.
- the spray coating device according to (1) further including a guide hole.
- the first adapter 1 is a hollow cylindrical body, and a plurality of air formed in the cylindrical body at a predetermined angle from the air inlet to the air outlet.
- the air with the air inlet force of the first adapter is introduced at a predetermined angle.
- the air is blown out by the air outlet hole, which is guided by the inclined air guide hole, and the blown air becomes torsional air that is directed in the circumferential direction of the coating pattern.
- the air blown out from the first adapter becomes so-called torsion air, and can more effectively cover the paint pattern without disturbing the paint pattern composed of paint and shaving air.
- the first adapter 1 has an air guide portion formed of a double cylinder, an air inlet and an air outlet formed at both ends of the air guide portion, and the air inlet from the air inlet side. And a movable guide vane extending toward the outlet to divide the inner space of the main body.
- the shape of the air guiding portion for guiding the introduced air to the air outlet is changed.
- the direction of the torsional air blown out from the air outlet can be changed.
- the first adapter (1) is detachable in order to replace the first adapter (1) with one having a shape corresponding to the shape of the object to be coated. Spray device as described.
- the predetermined angle of the air guide hole can be changed by replacing the first adapter with a first adapter having a shape corresponding to the shape of the object to be coated. it can.
- the efficiency of the effective application of the paint to the object can be improved.
- the paint pattern is preferably a small pattern having a small spread, and is preferably a smooth surface. In some cases, the paint pattern is preferably a large pattern with a large spread.
- the angle of the air guide holes By the way, by reducing the angle of the air guide hole, the widening force S of the blown out torsion air decreases, and by increasing the angle of the air guide hole, the widening force S of the blown out torsion air increases. Become. Therefore, in order to increase the effective application efficiency of the paint to the substrate, Since the coating pattern is made smaller when painting on the work, the angle of the air guide holes must be smaller to reduce the spread of torsional air that covers the outer periphery of the coating pattern.
- the painting pattern is enlarged, so the angle of the air guide hole must be large to increase the spread of torsional air. If you use, you will be used and divided.
- the first adapter which is a twisted air adapter, can be replaced with an adapter having a different angle, or the angle of the adapter itself can be changed.
- a plurality of blow-off layers are arranged on substantially concentric circles of the spray nozzle toward the outside from the spray nozzle side, and blow air in the spray direction of the spray nozzle.
- the innermost of the blowing layers covers the outer periphery of the coating pattern in the vicinity of the object with the blowing air, and the outermost of the blowing layers has the blowing layer with the blowing air.
- the air blown from the inner blowing layer covers the outer periphery of the coating pattern near the object to be coated, and the air blown from the outermost blowing layer is the inner blowing layer. It is adjusted to prevent diffusion of the air blown out from the outflow layer, and the air blown out from the outermost blowout layer blows out air more outward than the air blown out from the inner blowout layer.
- the outer air blown out from the second adapter does not disturb the coating pattern, thus covering the outer circumference of the coating pattern near the object to be coated! ⁇ It has the effect of preventing paint from scattering.
- the outer peripheral air blown from the outermost blowing layer is adjusted so as to prevent diffusion of the air blown from the inner blowing layer.
- a coating apparatus for forming a coating film on the first adapter the first adapter being provided in close proximity to the injection nozzle and substantially concentric with the injection nozzle, and blowing air in the injection direction of the injection nozzle;
- a second adapter having a plurality of blowout layers disposed outward and substantially concentrically with respect to the injection nozzle and outwardly from the injection nozzle side, and each of which blows air in the injection direction of the injection nozzle;
- the first adapter is provided with a blowing angle that is inclined toward the circumferential direction and blows out the introduced air, so that the coating air near the spray nozzle is blown by the air.
- the inside of the blow-out layer covers the outer periphery of the coating pattern near the object to be coated with the blown air, and the outermost of the blow-out layer blows the outer air of the spray pattern.
- the spraying is mainly performed by the torsion air blown out from the first adapter. Coating without disturbing the paint pattern near the spray, preventing the paint from splashing in the vicinity of the spray and without disturbing the paint pattern near the workpiece by the peripheral air blown out from the second adapter. By controlling the spread of the pattern, it is possible to prevent the paint from scattering near the object to be coated. By thus providing the first adapter and the second adapter in parallel, it is possible to more effectively prevent the paint from scattering from the vicinity of the spray to the vicinity of the object without disturbing the coating pattern.
- the temperature and humidity of the atmosphere in the coating pattern can be controlled.
- the temperature and humidity of the atmosphere in the coating pattern can be controlled.
- solvent, water, etc. can be adjusted, and the coating viscosity of the coating particles can be controlled.
- An air generator connected to one or more of the injection nozzle, the first adapter or the second adapter, and configured to adjust at least one of temperature, humidity, and air volume.
- the air that is connected to one or two or more of the injection nozzle, the first adapter, and the second adapter, and that is blown out by the first adapter and the second adapter at one time is subjected to temperature, humidity, and the like. Is controlled and the paint in the paint pattern can be heated and dehumidified effectively, so that the evaporation rate of volatile components (organic solvent, water, etc.) from the sprayed paint particles can be adjusted, Paint dripping can be prevented.
- the solvent etc. volatilizes before the paint is applied to an object to be coated, and the paint does not sag.
- the coating viscosity can be controlled, the coating applied to the object can be prevented from sagging, and the load applied to the coating apparatus can be reduced. In addition, clogging of the spray spray may occur.
- the temperature, humidity, and the like of the torsion air that is also blown out by the first adapter and the peripheral air that is blown out by the second adapter the dripping of the paint applied to the object is further reduced. Is prevented and a better coating finish can be obtained.
- a spray coating device according to any one of (1) to (9), further including a control device for controlling a coating machine body.
- these spray coating apparatuses are provided with an air generator, a paint supply device, and the like, and control the temperature, humidity, air volume, and angle of the air supplied to the first adapter, the second adapter, and the like. Calculations can be made, and the results of this calculation can be controlled and controlled by a controller that controls the air generator, coating machine, and paint supply machine. Obtain the temperature at which the proportion of solid components in the paint is obtained by a laboratory test in advance, store it in the recording device of the control device, and calculate the temperature, humidity, air volume, and angle of the air to be blown out by setting the target coating conditions Then, by transmitting the result to an air generator or a painting machine, painting can be performed automatically.
- the spray nozzle is provided substantially concentrically with the spray nozzle.
- a coating device provided with a first adapter that blows air in the jetting direction of the jet nozzle, as long as the coating pattern is not disturbed.
- a spray coating method wherein air is blown by giving an inclined blowing angle so that air blown out covers the outer periphery of the coating pattern near the injection nozzle.
- the spraying device provided with the first adapter that blows out the air sprayed in the spray direction of the spray nozzle, so-called torsion air
- the spray coating device since the paint is applied so as to cover the outer periphery of the paint pattern near the spray nozzle without disturbing the paint pattern, the scattering of the paint near the spray nozzle can be suppressed.
- the temperature and humidity of the atmosphere in the coating pattern can be controlled, and the volatile components of the sprayed paint particles (organic solvent, water, etc.) ) Can be adjusted, and the coating viscosity of paint particles can be controlled.
- the coating method may be performed so as to be substantially concentric with the spray nozzle.
- a coating apparatus provided with a second adapter having a plurality of blowout layers each of which is arranged outward from the spray nozzle side and blows air in the spray direction of the spray nozzle, and in which the paint pattern is not disturbed; Then, the innermost side of the blowing layer covers the outer periphery of the coating pattern near the object to be coated with the blowing air, and the outermost of the blowing layers is blown from the inner side of the blowing layer with the blowing air.
- a spray coating method characterized in that coating is performed so as to prevent diffusion of air.
- the air blown out of the blow-out layer inside the second adapter is used by using the coating apparatus having the second adapter having the plurality of blow-out layers for blowing the outer peripheral air to the spray coating apparatus. Since the coating covers the outer periphery of the coating pattern near the object to be coated, and the air blown from the outermost blowing layer is adjusted so as to prevent diffusion of the air blown from the inner blowing layer, the coating is performed. The outer periphery of the coating pattern near the object to be coated without disturbing the coating pattern is covered by the outer peripheral air blown out from the second adapter, so that the paint can be prevented from being scattered.
- the temperature and humidity of the atmosphere in the coating pattern can be controlled, and the volatile components (organic solvent, organic solvent, etc.) from the sprayed paint particles can be controlled. (E.g. water) And the coating viscosity of the paint particles can be controlled.
- the spray nozzle is close to the spray nozzle, and A first adapter that is provided substantially concentric with the injection nozzle and that blows out air by giving a blowing angle that is inclined in the injection direction of the injection nozzle; and a first adapter that is outside the first adapter and substantially concentric with the injection nozzle.
- a second adapter having a plurality of blowout layers each of which is arranged outward from the spray nozzle side and blows air in the spray direction of the spray nozzle.
- the air blown out covers the outer periphery of the coating pattern near the spray nozzle, and the air force blown out from the second adapter is the innermost of the blowout layers.
- the air covers the outer periphery of the coating pattern in the vicinity of the object to be coated, and the outermost layer of the blow-out layer prevents the air blown from the inside of the blow-out layer by the blown air, whereby the coating pattern is formed.
- Spraying wherein air blown from the first adapter and the second adapter cooperates with each other so as to cover the outer periphery of the entire coating pattern within a range in which no disturbance occurs. .
- the first adapter that blows air (so-called torsion air) that blows in the spray direction of the spray nozzle to the spray coating device, and is substantially concentric with the spray nozzle outside the first adapter.
- a coating apparatus provided with a second adapter having a plurality of blowout layers, each having a plurality of blowout layers for blowing air in the spraying direction of the spraying nozzles, each of which is disposed above the spraying nozzles and directed outward from the spraying nozzles.
- the air blown out by the first adapter covers the outer periphery of the paint pattern near the spray nozzle without disturbing the paint pattern.
- the air blown from the outermost blowing layer covers the outer periphery of the coating pattern in the vicinity, and the air blown from the inner blowing layer is prevented from diffusing, so that the coating pattern is disturbed.
- the first adapter and the second adapter work together to adjust and cover the entire outer periphery of the coating pattern as much as possible. Cover the spray pattern without disturbing the paint pattern near the spray spray to prevent the paint from splashing near the spray spray.
- the spread of the pattern is controlled by the outer peripheral air without disturbing the coating pattern in the vicinity of the object, so that the paint can be prevented from scattering near the object.
- the temperature and humidity of the blown air can be controlled, and the volatile components (organic solvent, water, etc.) from the spray paint particles can be controlled. ) Can be adjusted, and the coating viscosity of the paint particles can be controlled.
- the air blown from the first adapter and the second adapter is controlled in temperature, humidity, and the like in accordance with the type of the coating and the change in the site of the object to be coated. Since the coating is performed while adjusting the temperature and the amount of the solvent that forms the paint, coating can be performed under optimal coating conditions, and the paint applied to the object is prevented from sagging and the coating finish. Is good. Also, even if a low-viscosity paint diluted with a solvent or the like is sprayed with a spray force, the solvent or the like volatilizes before the paint is applied to the object to be coated, and the paint does not sag. In addition, the coating viscosity of the coating particles can be controlled, and the load applied to the coating apparatus can be reduced. In addition, clogging of the spray is generated, which reduces the time required for cleaning the spray and improves the coating efficiency.
- the air generated by the air generator force is also used as shaving air. Therefore, the temperature, humidity, and the like of the shaving air are controlled, and the shaving air is generated from the injected material particles.
- the evaporation rate of volatile components organic solvent, water, etc.
- the coating viscosity of the coating particles can be directly controlled.
- the air blown out from the first adapter and the Z or the second adapter is coated while being controlled so as to substantially match the induced flow rate generated due to the shaving air.
- Air volume and wind speed upon reaching the coating object Since it is the same as when there is no air blown out from each adapter, the coating pattern on the surface of the coating object is not disturbed, and the optimum coating finish can be obtained.
- the fact that the air volume and velocity at the time of reaching the object to be coated are the same as in the case of only shaping air is that the air volume and velocity of air blown from each adapter are zero on the surface of the object to be coated. Until it reaches the surface to be coated, the air blown out from each of these adapters covers around the paint, and the temperature and humidity are changed and maintained under moderate conditions.
- the induced flow generated by the shaving air means a wind generated around the shaving air.
- the spray paint particles moving by the wind are hardly applied to the object to be coated.
- And the painter body and the like are soiled by the blow-back. The invention's effect
- the first adapter and the Z or the second adapter are provided on the coating machine main body, and these adapters are supplied with torsion air and outer peripheral air (these are collectively referred to as shield air).
- shield air By coating the outer circumference of the coating pattern sprayed from the sprayer of the coating machine itself, the downflow speed of the conventional coating booth can be reduced, the amount of downflow is reduced, and the coating of water-based paint is performed.
- the range of humidity adjustment at the time becomes wider, and the energy used for air conditioning also decreases.
- this shielding effect prevents paint from scattering, increases coating efficiency, reduces the amount of paint used, and reduces industrial waste.
- the first adapter 1 has an air guide portion on its inner wall surface capable of giving a predetermined blowing angle to the air, so that the air supplied from the first adapter is twisted air.
- the paint pattern in the vicinity of the spray nozzle which does not disturb the paint pattern, can be controlled and applied.
- the second adapter 1 has a blow-off layer partitioned into multiple layers, and air blown from the inner blow-out layer of the multilayer covers the outer periphery of the coating pattern near the object to be coated.
- the air blown from the outermost blow layer is adjusted so as to prevent the air blown from the inner blow layer from spreading, so the spread of the paint pattern near the workpiece without disturbing the paint pattern Can be controlled and painted.
- FIG. 1 is a partially cutaway side view showing a first embodiment of the spray coating apparatus of the present invention.
- FIG. 2 is a front view of the first embodiment of FIG. 1.
- FIG. 3 is a view showing a first adapter attached to the first embodiment, wherein (a) is a perspective view, (b) is a front view, and (c) is a bottom view.
- FIG. 4 is a partially cutaway side view showing another example of the first embodiment shown in FIG. 1.
- FIG. 5 is a front view of the embodiment of FIG.
- FIG. 6 is a perspective view showing a first adapter mounted on the embodiment shown in FIG. 4.
- FIG. 7 is a view showing still another first adapter mounted on the spray coating apparatus of the present invention, wherein (a) is a perspective view, (b) is a front view, and (c) is a bottom view.
- FIG. 8 is a partially broken side view showing a main part of still another embodiment of the first embodiment shown in FIG. 1.
- FIG. 9 is a partially broken front view of the embodiment of FIG. 8.
- FIG. 10 is a partially broken side view showing a second embodiment of the spray coating apparatus of the present invention.
- FIG. 11 is a front view of the second embodiment in FIG. 10.
- FIG. 12 is a partially broken side view showing a main part of another embodiment of the second embodiment of the spray coating apparatus of the present invention.
- FIG. 13 is a front view of the embodiment of FIG.
- FIG. 14 is a partially broken side view showing a main part of still another embodiment of the second embodiment of the spray coating apparatus of the present invention.
- FIG. 15 is a front view of the embodiment of FIG.
- FIG. 16 is a partially broken side view showing a third embodiment of the spray coating apparatus of the present invention.
- FIG. 17 is a front view of the embodiment in FIG.
- FIG. 18 is a partially broken side view showing a fourth embodiment of the spray coating apparatus of the present invention.
- FIG. 19 is a front view of the embodiment in FIG. 18.
- FIG. 20 is a system flow chart of the spray coating apparatus of the present invention controlled by a control apparatus.
- FIG. 21 is a block diagram showing a configuration of a control device.
- FIG. 22 is an overall view of the inside of a booth incorporating the spray coating apparatus of the present invention.
- Fig. 23 is a diagram showing a film thickness distribution of a coating film in a vertical direction of a pattern.
- FIG. 24 is a view showing the effect of shield air on coating NV.
- FIG. 1 is a partially cutaway side view showing a first embodiment of the spray coating apparatus of the present invention
- FIG. 2 is a front view of the first embodiment of FIG. 1
- FIGS. 3A and 3B are views showing a first adapter attached to the embodiment, in which FIG. 3A is a perspective view, FIG. 3B is a front view, and FIG. In these figures, dimensions are appropriately adjusted for easy understanding.
- the spray coating apparatus 1 of the present invention mainly includes a coating machine main body 2, a first adapter 3, and a plurality of electrodes 4 (six in the present embodiment). Te ru.
- the coating machine body 2 is composed of a cylindrical casing formed of an insulating resin material such as polytetrafluoroethylene, and has a spray nozzle 6 at its tip end and atomized by the spray nozzle 6.
- a shaving ring 7 for ejecting shaving air for pushing the paint forward is provided.
- an air motor having an air bearing, a rotating shaft (not shown) driven to rotate by the air motor, and a paint supply device for supplying paint to the injection nozzle 6 are provided inside the casing 5.
- a paint pipe (not shown), an air supply pipe (not shown) for supplying air to the shaving ring 7, and the like are provided.
- the cup-shaped injection nozzle 6 rotatably provided on the tip end side of the casing 5 is connected to a rotation shaft in the casing 5.
- the spray nozzle 6 is rotated at a high speed by the rotational force of the rotating shaft, so that the paint supplied through the paint pipe is atomized and sprayed radially by centrifugal force.
- the paint used is not limited to the spray coating device 1, but includes a water-based paint, a solvent paint, The paint may be out of alignment!
- the electrode 4 extends radially outward from the base end side of the casing 5 at a distance of 60 degrees in the circumferential direction from the base end side of the casing 5.
- a corona discharge region is formed in front of the front end side of the electrode 4. It is charged.
- the first adapter 3 is formed in a cylindrical shape made of an insulating resin material such as polytetrafluoroethylene, and has an air guide portion formed by a double cylinder.
- a ring edge 3a having an inner diameter substantially equal to the outer diameter of the casing 5 is provided upright from the inner peripheral surface at a position inside the air guide section 3c on the air intake side at a predetermined distance on the air intake side.
- a plurality of air inlets 3b are formed in the rim 3a.
- a plurality of spiral grooves 3e are formed on the inner peripheral surface of the air guide portion 3c from the wheel rim 3a toward the air outlet 3d.
- the inner diameter of the air outlet 3d side is formed to be substantially the same as the outer diameter of the casing 5, and the part of the air outlet 3d and the wheel rim 3a is fitted to the casing 5 to form the main body of the coating machine. It is attached to 2.
- the first adapter 3 is supplied with air by an air generator (not shown) through an air inlet 3b, and the air is supplied to a spiral groove 3e formed on the inner wall surface of the air guiding portion 3c of the first adapter 3. It is guided and blown out as so-called torsion air (hereinafter this air is referred to as torsion air).
- Air is also introduced into the air inlet force of the first adapter 3, and the air has a blowing angle inclined in the circumferential direction by a spiral groove 3e formed on the inner peripheral surface of the air guide portion 3c. Given, it is blown out from the air outlet 3d as torsion air.
- the torsion air covers the coating pattern near the spray nozzle.
- the torsional air blown from the first adapter 3 is usually adjusted by exchanging a plurality of adapters with a twist angle of 20-60 °.
- a structure (not shown) in which the first adapter 13 is cut into a circle and the longitudinal direction is divided may be used.
- the work of replacing and setting 3 becomes easier, and the replacement work is improved.
- FIG. 4 is a partially broken side view showing another embodiment of the first embodiment shown in FIG. 1, FIG.
- FIG. 5 is a front view of the embodiment of FIG. 4, and FIG. 6 is a view of the embodiment shown in FIG. FIG. 4 is a perspective view showing a first adapter to be mounted.
- the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will not be repeated. Also, in this figure, the dimensions have been adjusted appropriately for easy understanding.
- the first adapter 3A that blows out torsional air divides the first adapter 3 of the first embodiment into three sections, and the longitudinal direction is divided into three sections (Fig. 6). ), And these divided parts are rotatably connected to each other. That is, the first adapter 3A is formed in a cylindrical shape made of an insulating resin material such as polytetrafluoroethylene as in the first embodiment, and is formed in a double cylinder. A rim 3a having an inner diameter substantially equal to the outer diameter of the casing 5 is provided upright from the inner peripheral surface at a position inside the air guiding portion 3c on the air intake side at a predetermined distance on the air intake side.
- a plurality of air inlets 3b are formed in the rim 3a.
- a plurality of spiral grooves 3e are formed on the inner peripheral surface of the air guiding portion 3c from the wheel rim 3a to the air outlet 3d, and the space between the air inlet 3b and the air outlet 3d is divided into three. And each is rotatable. For this reason, by rotating each of them, the shape of the spiral groove 3e formed on the inner wall surface of the air guiding portion 3c of the first adapter 3A can be changed, so that even if the coating pattern changes, By rotating the first adapter 3A to change the shape of the spiral groove 3e, it becomes possible to provide torsion air suitable for the coating pattern. Therefore, every time the paint pattern is changed, it is not necessary to replace it with an adapter corresponding to the pattern, and there is no need to prepare in advance various adapters with different shapes of the spiral groove 3e. It is a target.
- FIGS. 7A and 7B are views showing still another first adapter mounted on the spray coating apparatus of the present invention, wherein FIG. 7A is a perspective view, FIG. 7B is a front view, and FIG. 7C is a bottom view.
- the first adapter 3B shown in FIGS. 7 (a) to 7 (c) has a hollow portion 3g made of an insulating resin material such as polytetrafluoroethylene as in the first embodiment.
- a plurality of air guide holes 3f communicating with the air inlet 3b side force toward the air outlet 3d side and inclined at a predetermined angle are formed on a concentric circle in front view (in this embodiment, 8) are formed.
- the inclination angle of the air guide hole 3f is, for example, 30 °, 45 °, or the like, and may be appropriately set according to the size of the coating pattern. The extent of the torsional air blown out changes depending on the size of the inclination angle.
- the hollow portion 3g is for fitting the adapter 3B to the coating machine main body 2 (see Fig. 1) and has almost the same shape as the outer shape of the coating machine main body.
- the first adapter 3B is attached to the coating machine main body 2 (see Fig. 1) in the same manner as the first adapter 3 of the first embodiment by fitting the hollow portion 3g into the coating machine main body 2. Be attached. Then, air is introduced from the air inlet 3b, and the air is given a predetermined blowing angle inclined in the circumferential direction while passing through the air guide hole 3f, and is twisted from the air outlet 3d. It will be blown out. This torsion air covers the coating pattern near the spray nozzle.
- the torsion air blown out from the adapter 3B is adjusted by exchanging a plurality of adapters having an air guide hole having a twist angle of usually between 20 ° and 60 °.
- a structure (not shown) in which the first adapter 3B is cut into a circle and the longitudinal direction is divided may be used.
- the work of replacing and setting the adapter 3B becomes easier, and the replacement work is improved.
- FIG. 8 is a partially broken side view showing a main part of still another embodiment of the first embodiment shown in FIG. 1, and FIG. 9 is a partially broken front view of the embodiment of FIG.
- the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will not be repeated. Also, in this figure, dimensions are appropriately adjusted for easy understanding.
- the spray coating apparatus IB according to this still another embodiment is configured such that a first adapter 20 that blows out torsional air is divided into a plurality of sections by a guide vane 20e that stands upright in the circumferential direction.
- the space defined by the guide vane 20e is an air guide 2Oc, which guides the air introduced from the air inlet 20b and blows out from the air outlet 20d toward the paint pattern. It has become. 8 and 9, the electrode 4 shown in FIGS. 1, 2, 4 and 5 is omitted.
- the first adapter 20 is formed in a substantially cylindrical shape made of an insulating resin material such as polytetrafluoroethylene, and has an outer shape. It comprises a casing 20a formed of a substantially cylindrical double cylinder and a plurality of guide vanes 20e disposed inside the casing 20a.
- the guide vane 20e is a plate-like member that stands on the radiation in the circumferential direction (see Fig. 9), and its tip (the right-hand direction in Fig. 8) is formed on the air blowing side.
- the other end (left-hand direction in FIG. 8) is supported by a guide pin support shaft 20f and a cylindrical drive pin cut 20g provided concentrically with the first adapter 20.
- the driving pin unit 20g is connected to a donut-shaped disc-shaped driving ring 20h provided concentrically with the first adapter 20.
- the drive ring 20h is meshed and connected to a drive gear 20i that is linked to a drive device 20j provided outside the casing 20a.
- the guide vane 20e is operable, and the direction of the torsional air blown from the first adapter 20 is changed by changing the angle and the like of the guide vane 20e by the driving device 20j. This eliminates the need to replace the adapter every time the coating pattern is changed, and is economical because it is not necessary to previously prepare various types of adapters having different shapes of the air guide section 20c.
- the method of moving the guide vane 20e is not limited to the above-described gear system, but may be a cylinder system or the like.
- the materials of the first adapters 3, 3A, 3B, 20 described above are not limited to the above-mentioned insulating resin materials, but include synthetic resins, resin-coated metal materials, ceramics and the like. It can be either. In the case of electrostatic coating, it is preferable to use an insulating material.
- FIG. 10 is a partially cut-away side view showing a second embodiment of the spray coating apparatus of the present invention.
- FIG. 11 is a front view of the second embodiment of FIG.
- the same components as those of the spray coating apparatus according to the first embodiment are denoted by the same reference numerals, and redundant description will be omitted. Also, in this figure, the dimensions have been appropriately adjusted for easy understanding.
- the spray coating apparatus 1C includes a coating pattern and a Z or twist twist around an outer periphery of a coating machine main body 2 provided with a plurality of electrodes 4 (six in the present embodiment).
- a second adapter 30 of a cylindrical triple pipe that blows out the outer peripheral air so as to cover the outside is provided.
- the second adapter 30 has a two-layer structure with a blow-off layer 30c, and a vertical cross-section with the air blow-out end (the right-hand direction in FIG. 10) facing outward is substantially in the shape of a "C". It has a shape.
- the tip (air blowing side) of the outer blowing layer 30c faces further outward than the tip of the inner blowing layer 30c.
- the air blown from the outer blow layer 30c can blow air more outward than the air blown from the inner blow layer 30c.
- the outer peripheral air blown out from the second adapter 30 does not disturb the coating pattern, covers the outer periphery of the coating pattern near the object to be coated, and has the effect of preventing the paint from scattering.
- the outer air blown from the outer blow layer 30c is adjusted so as to prevent the air blown from the inner blow layer 30c from diffusing. You can paint by controlling the spread of the paint.
- the outer peripheral air blown out from the second adapter 30 is adjusted in its spread by adjusting the air amount pressure from the air inlet 30b.
- the outermost tube of the second adapter 30 may be configured to be slidable in the left-right direction.
- the angle of the outer air blown from the outer blowing layer 30c is adjusted. Accordingly, even if the coating pattern changes, it is possible to blow out the outer peripheral air corresponding to the change, which is more preferable.
- the second adapter 30 may be formed as a triple tube, and the blowing layer 30c may be formed as a double layer. Also in this case, the outermost outlet layer 30c is directed further outward than the other inner outlet layers 30c.
- painting with electrode 4 As a device! / But it can be a coating device with electrode 4! /.
- FIG. 12 is a partially broken side view showing a main part of another embodiment of the spray coating apparatus according to the second embodiment of the present invention
- FIG. 13 is a front view of the embodiment of FIG.
- the same components as those of the spray coating apparatus according to the second embodiment are denoted by the same reference numerals, and redundant description will be omitted. Also, in this figure, the dimensions have been appropriately adjusted for easy understanding.
- the spray coating apparatus 1D includes a plurality of second adapters 40 for blowing the outer peripheral air around the outer periphery of the coater main body 2 on the outer periphery of the coater main body 2 on a concentric circle (this embodiment). (4 in the form).
- the second adapter 40 has a rectangular parallelepiped casing 40a which also has an insulating resin material such as polytetrafluoroethylene, and an air outlet 40d on the side of the injection nozzle 6 where paint is injected in the casing 40a. Equipped with air guide device 40c.
- the air guide device 40c is connected to a cylinder 40e connected to the movable device 40f, and the angle of the air outlet 40d of the air guide device 40c can be changed by pulling the cylinder 40e by the movable device 40f. I have.
- the air introduced from the air inlet 40b of the second adapter 40 is blown out from the air outlet 40d of the air guide device 40c set in a predetermined direction, and covers the shaving air and the torsion air.
- painting can be performed by controlling the spread of the painting pattern in the vicinity of the object without disturbing the painting pattern.
- an electrode is provided. It may be a coating apparatus provided with electrodes as in the second embodiment!
- FIG. 14 is a partially broken side view showing a main part of still another embodiment of the second embodiment of the spray coating apparatus of the present invention
- FIG. 15 is a front view of the embodiment of FIG. .
- the same components as those of the spray coating apparatus of the second embodiment are the same.
- the same reference numerals are given, and the overlapping description will be omitted. Also, in this figure, the dimensions have been appropriately adjusted for easy understanding.
- the spray coating apparatus 1E is composed of a coating device main body 2 and a second adapter 50 fitted and arranged on the outer periphery thereof.
- the second adapter 50 has an inner cylinder 50a having an inner diameter approximately the same as the outer diameter of the casing 5 of the coating device main body 2 and an L-shaped vertical section, and an inner diameter approximately the same as the outer diameter of the inner cylinder.
- the inner cylinder 50a is formed with an air inlet 50c on the anti-injection nozzle side, and the air outlet side (injection nozzle 6 side) is substantially trapezoidal and hollow inside.
- a bellows 50d for adjusting the spread angle is formed!
- the bellows 50d can be deformed in the left-right direction by a bellows pushing nut 50e provided on the side opposite to the air inlet.
- the outer cylinder for angle adjustment 50b abuts and fits at the top (L-shaped cross section) on the air inlet 50c side of the inner cylinder 50a so that it can move in the left-right direction (the direction of the arrow in FIG. 14).
- the space formed between the bellows 50d formed in the inner cylinder 50a and the outer cylinder 50b for angle adjustment serves as an air guide 50f, and the air supplied from the air inlet 50c is guided to the air guide 50f. It is blown out as outer air.
- the angle at which the outer peripheral air is blown out is adjusted by moving the outer cylinder for angle adjustment 50b in the left-right direction. That is, by moving the outer cylinder 5 Ob for angle adjustment in the left-hand direction, it is blown more outward.
- the materials of the second adapters 30, 30A, 40, and 50 described above are also limited to the insulating resin materials described above, similarly to the first adapters 3, 3A, 3B, and 20. Any of resin, resin-coated metal material, ceramic, etc. may be used. In the case of electrostatic coating, it is preferable to use an insulating material.
- the outer peripheral air blown out from the second adapter 50 as described above covers the jumping air and the torsion air, and controls the spread of the coating pattern near the object to be coated without disturbing the coating pattern. It will be possible to paint.
- FIG. 16 is a partially cutaway side view showing a third embodiment of the spray coating apparatus of the present invention
- FIG. 17 is a front view of the embodiment of FIG.
- the same components as those of the spray coating apparatus of the first embodiment and the second embodiment are denoted by the same reference numerals.
- the overlapping description will be omitted.
- the dimensions have been appropriately adjusted for easy understanding.
- the spray coating apparatus 1F is mainly composed of a coating device main body 2, the first and second adapters 3 and 30, and the electrodes 4. That is, the first adapter 3 described in the spray coating apparatus 1 of the first embodiment described above and the second adapter 30 described in the spray coating apparatus 1C of the second embodiment are provided side by side.
- the first adapter 3 is fitted and attached to the cylindrical casing 5 of the coating machine main body 2 in the vicinity of the injection nozzle 6.
- the first adapter 3 is formed in a cylindrical shape made of an insulating resin material such as polytetrafluoroethylene, and has an air guiding portion 3c formed in a double cylinder.
- a rim 3a having an inner diameter substantially equal to the outer diameter of the casing 5 is erected from the inner peripheral surface at a position inside the air guide portion 3c on the air intake side at a predetermined distance, and the rim 3a has A plurality of air inlets 3b are formed.
- a plurality of spiral grooves 3e are formed on the inner peripheral surface of the air guide portion 3c from the wheel rim 3a toward the air outlet 3d (see FIG. 3).
- the inner diameter of the air outlet 3d side is formed to be substantially the same as the outer diameter of the casing 5, and the part of the air outlet 3d and the wheel rim 3a is fitted to the casing 5 to form the coating machine body 2. It is installed.
- the first adapter 3 is supplied with air through an air inlet 3b with the same force as an air generator (not shown), and this air is formed on a spiral formed on the inner peripheral surface of the air guiding portion 3c of the first adapter 3. It is guided to the groove 3e and is blown out as so-called torsion air.
- the torsional air blown out from the first adapter 3 is usually adjusted by exchanging a plurality of adapters with a twist angle of 20-60 °.
- the second adapter 30 is disposed concentrically around the outer periphery of the coating machine body 2 outside the electrode 4.
- the second adapter 30 is formed of a cylindrical triple tube, and has a double-layered blow-out layer 30c. It is shaped like a letter. Further, the tip (air blowing side) of the outer blowing layer 30c is more outward than the tip of the inner blowing layer 30c. Thus, the air blown out from the outer blowing layer 30c has a structure in which the air blown more outward than the air blown out from the inner blowing layer 30c is formed.
- the outer peripheral air blown out from the second adapter 30 is adjusted in its spread by adjusting the amount of air and the air pressure from the air inlet 30b.
- the blowing layer 30c is not limited to the two-layer structure, but may have a three-layer or more structure.
- FIG. 18 is a partially cutaway side view showing a fourth embodiment of the spray coating apparatus of the present invention
- FIG. 19 is a front view of the embodiment of FIG.
- the same components as those of the spray coating apparatuses of the first embodiment and the second embodiment will be assigned the same reference numerals, and overlapping descriptions will be omitted. Also, in this figure, the dimensions have been appropriately adjusted for easy understanding.
- the spray coating apparatus 1G mainly includes a coater main body 2, the first adapter 3, the second adapter 30A, and the electrode 4 described above. That is, the outermost pipe 30a is moved left and right by the first adapter 3 described in the spray coating apparatus 1 of the first embodiment and the second adapter 30 described in the spray coating apparatus 1C of the second embodiment. The one that can be slid was added. That is, the second adapter 30A can change the blowing direction of the outermost blowing layer 30c of the multilayered blowing layer.
- the first adapter 3 is fitted and attached to the cylindrical casing 5 of the coating machine main body 2 near the injection nozzle 6.
- the first adapter 3 is formed in a cylindrical shape made of an insulating resin material such as polytetrafluoroethylene, and has an air guiding portion 3c formed in a double cylinder.
- a rim 3a having an inner diameter substantially equal to the outer diameter of the casing 5 is erected from the inner peripheral surface at a position inside the air guide portion 3c on the air intake side at a predetermined distance, and the rim 3a has A plurality of air inlets 3b are formed.
- a plurality of spiral grooves 3e are formed on the inner peripheral surface of the air guide portion 3c from the wheel rim 3a toward the air outlet 3d (see FIG. 3).
- the inner diameter of the air outlet 3d is substantially the same as the outer diameter of the casing 5, and the air outlet 3d and the wheel rim 3a are fitted to the casing 5 and mounted on the coating machine body 2.
- the first adapter 3 is supplied with air through an air inlet 3b with the same force as an air generator (not shown), and the air is supplied to a spiral groove 3e formed on the inner wall surface of the air guiding portion 3c of the first adapter 3. And blown out to the outside as so-called torsional air.
- the torsional air blown from the first adapter 3 is usually adjusted by exchanging a plurality of adapters with a twist angle of 20 to 60 °.
- the second adapter 30 A is arranged concentrically with the coating machine main body 2 outside the electrode 4.
- the second adapter 30A is formed of a cylindrical triple tube, and has a double-layered blow-out layer 30c. It has a U-shaped shape. Further, the tip (air blowing side) of the outer blowing layer 30c is more outward than the tip of the inner blowing layer 30c.
- the pipe 30a of the outer blowing layer 30c is configured to be slidable in the left-right direction (the direction of the arrow in FIG. 18).
- the tube 30a of the outer blowing layer 30c has a structure in which the air inlet 30b side is sealed by an O-ring 60, so that air does not leak even if it slides in the left-right direction.
- the air blown from the outer blow layer 30c is adjusted so that the air blown more outward than the air blown from the inner blow layer 30c. You can do it.
- the outer peripheral air blown out from the second adapter 30A covers the outer periphery of the coating pattern near the object to be coated without disturbing the coating pattern, and has an effect of preventing the paint from scattering. Further, the air blown from the outer blowing layer 30c is adjusted so as to prevent the air blown from the inner blowing layer 30c from diffusing. Therefore, it is possible to control the spread of the coating pattern in the vicinity of the object to be coated without disturbing the coating pattern.
- the outer peripheral air blown out from the second adapter 30A is adjusted in its spread by adjusting the amount of air and the air pressure from the air inlet 30b.
- the air blown from the outermost blowing layer 3 Oc can also be adjusted by sliding the outermost tube 30a in the left-right direction.
- the blowing layer 30c is not limited to the two-layer structure, and may have a three-layer or more structure.
- the spray coating apparatus described above includes an air generator, a compressor, and a paint supply. And calculates the temperature, humidity, air flow, and angle of the air supplied to the first adapter, second adapter, etc., and applies the calculation results to the coating equipment, air generator, compressor, paint supply machine, etc. It may be controlled by a control device provided with a communication interface.
- the temperature of the torsion air blown out from the first adapter and the peripheral air blown out by the second adapter should be set in advance by performing a lab test in advance to a temperature that is the desired (desired) ratio of the solid component in the sprayed paint.
- the temperature, humidity, air volume, and angle of the air to be blown out are calculated by setting the target coating conditions, and the results are calculated by the coating device, air generator,
- the information may be transmitted to a compressor, a paint supply device, or the like to control each flow control valve.
- a coating system incorporating the above control device will be specifically described with reference to FIGS. 20 and 21 using a coating device provided with a first adapter and a second adapter.
- FIG. 20 is a system flow diagram of the spray coating apparatus of the present invention controlled by the control device
- FIG. 21 is a block diagram showing a configuration of the control device.
- this coating system generates air to supply air to the spray coating apparatus 1 equipped with the first adapter 3 and the second adapter 30 and the first adapter 3 and the Z or the second adapter 30. And a compressor 102 for supplying air to the shaving ring 7 of the spray coating device 1, a paint supply device 103 for supplying paint to the spray nozzle 6 of the spray coating device 1, and a control device 120. .
- the air generator 101 is for supplying air to the first adapter 3 and the Z or the second adapter 30 attached to the spray coating apparatus 1, and introduces outside air through the filter 101a.
- the air flow control valve 107a and the second adapter which consist of a blower 101b and a heater 101c that heats the introduced outside air, adjust the amount of air supplied to the sensor 106b of the temperature and humidity controller 11 la and the first adapter 3.
- the temperature-controlled air is supplied to the first adapter 3 and the Z or the second adapter 30 through an air supply line 104 provided with an air flow control valve 107b for adjusting the amount of air supplied to the air conditioner.
- This air generator 101 may also serve to supply shaving air to the spray coating device 1.
- the compressor 102 is for supplying shaving air to the spray coating machine 1 and, like the air generator 101, is a blower 10 for introducing outside air through a filter 102a. 2b and a heater 102c that heats the introduced outside air, and has an air flow control valve 107c that adjusts the amount of air supplied to the temperature and humidity controller 11 lb sensor 106b and the shaving ring 7.
- the temperature-controlled air is supplied to the shaving ring 7 through the pipe 104.
- the paint supply device 103 also serves as a pressure feeder 103a for feeding the paint and a heater 103b for heating the paint, and also controls the amount of the paint supplied to the sensor 106d and the injection nozzle 6 of the temperature controller 112.
- the paint is supplied to the injection nozzle 6 through a paint supply line 105 provided with a flow control valve 108.
- Each of the heaters 101c, 102c, and 103b has a heating medium supply pipe 110 provided therein.
- the heating medium supply pipe 110 is provided with an electromagnetic heating medium flow rate adjustment partway. Valves 109a, 109b, and 109c are provided. Then, the heat medium flowing through the heat medium supply pipe 110 performs forced heat exchange with the forced supply air or the paint to generate temperature-controlled air or the like. With the heat medium flow control valves 109a and 109b, the flow rate of the heat medium can be adjusted to adjust the temperature of the temperature-controlled air or the like.
- the control device 120 includes a data bus (BUS) 121 having a CPU 122, a ROM 123, a RAM 124, an air generator 101, a compressor 102, a paint supply device 103, and other flow control valves 107a to 107c, And an interface 125 for transmitting / receiving signals to / from the sensors 108a, 109a-109c and the sensors 106a-106d.
- BUS data bus
- the CPU 122 calculates the temperature, humidity, air volume, angle, and the like of the blown air according to the type of the paint and the shape of the coated material, and stores the same in the ROM 123.
- Various operations are executed in accordance with a program being executed, and each peripheral device is controlled in accordance with the operation.
- the program may be recorded on a recording medium such as a CD-ROM, or may be recorded on another recording unit, such as a program recorded on the ROM 123.
- Signals from the sensors 106a to 106d are input to the control device 120.
- the sensor 106a detects the outside air temperature (the temperature inside the coating booth), the sensor 106b detects the temperature of the torsion air and the outer peripheral air, and the sensor 106c detects the temperature of the shaving air. And the sensor 106d detects the temperature of the paint. It is.
- a control signal is output from the control device 120, and the control signal is sent to the aforementioned air flow control valves 107a, 107b, 107c, paint flow control valve 108, and heat medium flow control valves 109a, 109b, 109c. To be entered.
- controller 120 sets the temperature at which the proportion of the solid component in the ejected paint becomes a desired temperature as the set temperature in consideration of the outside air temperature, and sets the temperature of the temperature-controlled air at the set temperature.
- the air flow regulating valves 107a, 107b, 107c and the heat medium flow regulating valves 109a, 109b are feedback-controlled based on the temperatures detected by the sensors 106b, 106c.
- the temperature of the torsion air and the peripheral air is set to be higher when the outside air temperature (the temperature inside the coating booth) is low than when the outside air temperature is higher than the low temperature.
- the temperature of the torsional air and the outer peripheral air can be set in advance by a lab test to obtain a target (desired) temperature at which the ratio of the solid component in the ejected paint is obtained, and the recording device of the control device is used.
- the coating can be performed automatically. Become.
- the overall configuration of the coating booth is such that the spray coating device 1 of the present invention is installed in the coating booth 70 at left and right positions with the object 80 to be sandwiched therebetween. Air is supplied from the upper side to the lower side in the painting booth 70, and is discharged together with the paint mist from the exhaust port 70a provided below. Further, the air generator 101, the compressor 102, the paint supply device 103, and the like, which are connected to the spray coating device 1 described with reference to FIG. 20, are arranged outside the coating booth 70.
- the air nozzle (not shown) for driving the air motor rotates the cup-shaped injection nozzle 6 with the supplied air.
- the paint supplied from a paint supply pipe (not shown) is rotated by the centrifugal force based on the rotation of the spray nozzle 6 from the spray nozzle 6, and the paint rotates from the tip of the peripheral edge of the spray nozzle 6 in the radial direction. Spouting outward while spreading outward, the sprayed paint (supply paint) will be applied to the object to be coated.
- air is supplied from a shaving air supply pipe (not shown), and the air is ejected from the shaving ring 7 as shaving air (compressed air).
- the shaving air surrounds the outer periphery of the paint jetted from the jet nozzle 6 and forms a coating pattern of the jetted paint.
- the first adapter 3 installed near the injection nozzle 6 and the annular shaving ring 7 and substantially concentric with the injection nozzle 6 also applies temperature-controlled torsional air to the circle of the coating pattern.
- the torsion air surrounds the outer periphery of the paint pattern as described above.
- the torsion air has a lower speed and a larger air volume than the shaving air, and when the outside air temperature (the temperature inside the coating booth) is low, it is higher than when the outside air temperature is higher than the low temperature. Is to be done.
- This twisted air covers the outer periphery of the paint pattern near the spray nozzle without disturbing the paint pattern, and can suppress the scattering of paint near the spray nozzle.
- the setting of the temperature of the torsion air is performed by obtaining a temperature at which a target (desired) ratio of the solid component in the ejected paint is obtained in advance by a laboratory test.
- the temperature range of the torsion air is preferably about 20-80 ° C as a guide.
- the flow rate, the flow rate of the shaving air, by the flow of about 1 one 5 m 3 Zmin position is favored arbitrariness.
- the flow velocity is preferably about 115 mZsec.
- the blowing angle of the torsion air is desirably in the circumferential direction of the coating pattern in order to suppress disturbance with the shaving air. In the case of a water-based paint, it is preferable to appropriately adjust the humidity within a range of about 20 to 70%.
- the second adapter installed outside the first adapter 3 and substantially concentric with the injection nozzle 6 is provided.
- the outer peripheral air whose temperature has been adjusted is also blown out from the adapter 30, and the outer peripheral air surrounds the outer periphery of the paint pattern and the torsion air. Since the blowing layer 30c of the second adapter 30 has a multilayer structure, the air blown from the inner blowing layer 30c covers the outer periphery of the coating pattern near the article to be coated, and the outermost blowing layer 30c The air blown out from is adjusted so as to prevent diffusion of the air blown out from the inner blowing layer 30c.
- the air blown out from the outermost blowout layer 30c blows out air more outward than the air blown out from the inner blowout layer 30c, so that the outer air blown out from the second adapter 30 is painted.
- the outer periphery of the coating pattern near the object to be coated is covered without disturbing the pattern, and the effect of preventing the paint from scattering is exerted.
- the outer peripheral air blown from the outermost blowing layer 30c is adjusted so as to prevent diffusion of the air blown from the inner blowing layer 30c. For this reason, it is possible to control the spread of the coating turn near the object to be coated without disturbing the coating pattern.
- the temperature of the outer peripheral air is set by obtaining a target (desired) temperature at which the proportion of the solid component in the ejected paint is obtained by a laboratory test in advance.
- the temperature range is preferably about 20-80 ° C as a guide.
- the flow rate depends on the flow rate and flow rate of the shaving air, but is preferably about 115 m 3 Zmin. Further, the flow velocity is preferably about 15 to 15 mZsec.
- the outer air jet angle is the same as or larger than torsion air (more outward) in order to suppress turbulence with shaving air and torsion air and prevent paint from scattering near the workpiece. It is desirable that
- the torsional air and Z or the outer peripheral air are supplied to the outer periphery of the coating pattern, the torsional air and Z or the outer peripheral air serve as shield air, and the outside air induced flow causes shaving of the coating pattern.
- the entry of the air is suppressed, and the temperature of the shaving air is prevented from drastically lowering based on the outside air induced flow, and the shaving air is guided by the torsion air and Z or the outer peripheral air which are guided and mixed into the shaving air.
- the temperature will be controlled to prevent changes in the proportion of solids in the bleed paint.
- the twisting air and the Z or outer air do not reduce the temperature of the shaving air by themselves due to the temperature adjustment function.
- the torsional air and Z or the outer peripheral air are slower than the shaving air, the external air (air in the painting booth) is drawn in by the torsional air and z or the outer peripheral air (the generation of induced flow).
- the penetration force can be reduced, and the torsional air and Z or the outer peripheral air have a lower speed and a larger air volume than the shaving air. This makes it more difficult to enter the shaving air through the air. For this reason, it is possible to further prevent the coating finish of the object to be coated from being deteriorated due to the induced flow.
- the air guide 3c formed of a double cylinder, the air inlet 3b and the air outlet 3d formed at both ends of the air guide 3c, and the inner periphery of the air guide 3c are described.
- a first adapter 3 having a plurality of spiral grooves 3e formed on the surface thereof, and a second adapter 30 having a multilayer blowout layer 30c each of which blows air in the direction of injection of the injection nozzle are provided.
- each adapter is not limited to this, and the same can be said for another embodiment as described above.
- the first adapter 3 or the second adapter 30 is provided with either one of them, the air force blown out by each adapter exerts the above-mentioned effects. .
- a spray coating apparatus 1 of the present invention shown in FIG. 1 was used to apply an aqueous base paint having a solid content of 20% by weight to a vertically installed tin plate having a thickness of about 0.3 mm.
- the distance between the injection nozzle and the plate material to be coated was 220 mm.
- the coating conditions of the aqueous base paint were as follows: the number of revolutions was 50,000 rpm, the paint discharge amount was 270 ccZmin, the shaving air pressure was 300 NlZmin, and the applied current was 400 ⁇ m. ° C (both humidity 70% RH), supply air volume 2m 3 Setting to Zmin, the first adapter also blew out. The angle of the torsion air blown from the first adapter was 30 °.
- the film thickness of the coating film applied to the object to be coated was measured, and the coating was applied as a film thickness distribution in the vertical direction of the pattern.
- the film thickness of the coating film was measured from the center to the peripheral portion of the coating film, and is shown in FIG. 23 as a ratio to the film thickness at the center portion.
- the film thickness distribution of the coating film when the coating was performed without supplying the shield air is also shown.
- the applied NV is 25-35%, which is the best applied condition. If it is less than 25%, the paint will sag and paint, and if it is more than 35%, the skin will be rough and the finish will be finished. Gets worse.
Landscapes
- Nozzles (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04793198A EP1688185A4 (en) | 2003-10-31 | 2004-10-29 | DEVICE AND METHOD FOR SPRAY COATING |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003372645A JP4409910B2 (ja) | 2003-10-31 | 2003-10-31 | スプレー塗装装置および塗装方法 |
JP2003-372645 | 2003-10-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005042170A1 true WO2005042170A1 (ja) | 2005-05-12 |
Family
ID=34544037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/016090 WO2005042170A1 (ja) | 2003-10-31 | 2004-10-29 | スプレー塗装装置および塗装方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050181142A1 (ja) |
EP (1) | EP1688185A4 (ja) |
JP (1) | JP4409910B2 (ja) |
CN (1) | CN100592934C (ja) |
WO (1) | WO2005042170A1 (ja) |
Cited By (1)
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CN113293542A (zh) * | 2021-04-10 | 2021-08-24 | 重庆海通环保科技有限公司 | 一种用于制作反渗透膜的喷涂装置 |
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JP4787575B2 (ja) * | 2005-09-02 | 2011-10-05 | 日産自動車株式会社 | 塗装設備及び塗装方法 |
DE102006019890B4 (de) * | 2006-04-28 | 2008-10-16 | Dürr Systems GmbH | Zerstäuber und zugehöriges Betriebsverfahren |
DE102007030724A1 (de) * | 2007-07-02 | 2009-01-08 | Dürr Systems GmbH | Beschichtungseinrichtung und Beschichtungsverfahren mit konstanter Lenklufttemperatur |
FI20080264L (fi) * | 2008-04-03 | 2009-10-04 | Beneq Oy | Pinnoitusmenetelmä ja -laite |
US9375746B2 (en) * | 2008-06-05 | 2016-06-28 | Durr Systems Gmbh | Compact paint booth |
DE102008053178A1 (de) | 2008-10-24 | 2010-05-12 | Dürr Systems GmbH | Beschichtungseinrichtung und zugehöriges Beschichtungsverfahren |
CN101922229B (zh) * | 2009-06-17 | 2012-09-05 | 陈永生 | 高空涂料多喷嘴机与滚涂式方法 |
DE102009042956A1 (de) * | 2009-09-24 | 2011-04-07 | Dürr Systems GmbH | Rotationszerstäuber und Verfahren zur Kontrolle seines Absprühkörpers |
KR101140617B1 (ko) * | 2009-11-26 | 2012-05-02 | 주식회사 이시스 | 광역 분무장치 |
EP2775340A4 (en) * | 2011-10-31 | 2015-07-15 | Hoya Corp | GLASSES OF GLASSES AND PROCESS FOR PRODUCING THE SAME |
CN102671843B (zh) * | 2012-05-21 | 2014-01-15 | 西安交通大学 | 一种波纹状织构化表面的制备方法 |
ITFI20120205A1 (it) * | 2012-10-10 | 2014-04-11 | Eurosider Sas Di Milli Ottavio & C | Metodo e apparato per la verniciatura elettrostatica |
JP6126867B2 (ja) * | 2013-02-25 | 2017-05-10 | 東京応化工業株式会社 | 塗布装置及び塗布方法 |
ITFI20130132A1 (it) * | 2013-06-03 | 2014-12-04 | Eurosider Sas Di Milli Ottavio & C | Metodo e apparato per la verniciatura elettrostatica mediante fluido vettore arricchito in ossigeno |
JP6234736B2 (ja) * | 2013-08-30 | 2017-11-22 | 芝浦メカトロニクス株式会社 | スピン処理装置 |
CA2966129C (en) * | 2014-10-27 | 2022-08-02 | Council Of Scientific & Industrial Research | Manually controlled variable coverage high range electrostatic sprayer |
JP6319233B2 (ja) * | 2015-08-28 | 2018-05-09 | トヨタ自動車株式会社 | 静電微粒化式塗装装置及び塗装方法 |
US10786821B2 (en) * | 2018-07-31 | 2020-09-29 | Nordson Corporation | Systems and methods for coating with shear and moisture sensitive materials |
IT201800009255A1 (it) * | 2018-10-08 | 2020-04-08 | Technoalpin Holding - Spa | Macchina per l’emissione di almeno un getto di fluido e metodo per l’emissione di almeno un getto di fluido |
CN112007775B (zh) * | 2020-09-04 | 2021-05-28 | 郑州工业应用技术学院 | 一种喷涂范围可调式建筑装修装饰用喷涂机 |
TWI768600B (zh) * | 2020-12-17 | 2022-06-21 | 魏榮宗 | 廢氣淨化系統 |
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- 2004-10-29 EP EP04793198A patent/EP1688185A4/en not_active Withdrawn
- 2004-10-29 WO PCT/JP2004/016090 patent/WO2005042170A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
US20050181142A1 (en) | 2005-08-18 |
EP1688185A4 (en) | 2008-11-05 |
CN1874848A (zh) | 2006-12-06 |
JP4409910B2 (ja) | 2010-02-03 |
EP1688185A1 (en) | 2006-08-09 |
CN100592934C (zh) | 2010-03-03 |
JP2005131590A (ja) | 2005-05-26 |
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