WO1996023591A1 - Dispositif de peinture electrostatique de type aerographe - Google Patents
Dispositif de peinture electrostatique de type aerographe Download PDFInfo
- Publication number
- WO1996023591A1 WO1996023591A1 PCT/JP1996/000053 JP9600053W WO9623591A1 WO 1996023591 A1 WO1996023591 A1 WO 1996023591A1 JP 9600053 W JP9600053 W JP 9600053W WO 9623591 A1 WO9623591 A1 WO 9623591A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- paint
- spray gun
- nozzle
- spray
- type electrostatic
- Prior art date
Links
Classifications
-
- 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
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
- B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
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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
- B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
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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
- B05B5/053—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
- 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
- B05B5/16—Arrangements for supplying liquids or other fluent material
- B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
Definitions
- the present invention relates to a spray gun type electrostatic coating apparatus which is particularly suitable for spraying water-based paints and metallic paints.
- paints used for electrostatic coating are roughly classified into solvent-based paints (oil-based paints) having relatively high electric resistance and water-based paints (water-based paints) having relatively small electric resistance.
- solvent-based paints oil-based paints
- water-based paints water-based paints
- metallic paints in which metal powders are dispersed in these solvent-based paints and water-based paints. These metallic paints have a relatively low electrical resistance value like water-based paints. It is small.
- paints have different resistance values according to their types, and therefore, the method of applying a high voltage also differs according to the type of paint.
- color change valve devices, etc. are used by connecting to ground, but solvent-based paints have relatively high resistance. Therefore, when a solvent-based paint is used, even if a high voltage is directly applied from a high-voltage generator externally provided to the center electrode of the spray gun body, the spray gun body is connected via the paint supply passage. It will not be at ground potential. Therefore, the electrostatic coating device used for the solvent-based paint applies a high voltage directly to the spray gun body to directly charge the paint particles.
- an external electrode is provided radially outside the spray gun body, and a high resistance and a high voltage cable are provided to the external electrode.
- a high voltage for example, 690 kV
- an external electrode type spray gun type electrostatic coating device that connects the spray gun body to ground is often used.
- reference numeral 1 denotes a conventional spray gun type electrostatic coating device
- the spray gun type electrostatic coating device 1 has a mounting portion 2 for fixing to a reciprocator (not shown) or the like.
- a valve device mounting section 3 containing paint valves 16 and 17 and a drain valve (not shown) and the like described below, a coating machine 4 fixed to the valve device mounting section 3, and the valve
- the side surface is fixed to the device mounting portion 3 and is roughly constituted by an external electrode portion 5 provided in parallel on the outer peripheral side of the coating machine 4.
- reference numeral 6 denotes a spray gun main body
- the spray gun main body 6 is made of polytetrafluoroethylene (PTFE) or polytetrafluoroethylene as an insulating resin material. It is formed in a long tubular shape using insulating resin materials such as PET (PET).
- PET PET
- the tip side of the spray gun body 6 A nozzle accommodating portion 6A serving as a tapered concave portion for accommodating a paint nozzle 7 described later is formed, and the base end is fixed to the valve device mounting portion 3.
- Reference numeral 7 denotes a paint nozzle which is screwed to the center of the tip of the spray gun body 6 and is formed of an insulating resin material such as PTFE or PET so that the inside is formed as a paint passage.
- the paint nozzle 7 has a tapered rear end side, and a fitting section 7A fitted into the nozzle accommodating section 6A of the spray gun body 6, and a small diameter toward the distal end side.
- a valve seat 7B is formed at the tip of the valve seat 7B, and a spray is applied to the needle valve 18 when the needle valve 18 is opened.
- An annular protruding portion 7E is formed so as to protrude in an annular shape, and is in contact with a concave portion 8A of an air nozzle 8 described later.
- Reference numeral 8 denotes an air nozzle that is provided so as to cover the tip side of the paint nozzle 7, and is fixed to the tip side of the spray gun body 6 via a retainer ring 9.
- 8 is formed of an insulating resin material such as PTFE or PET.
- the air nozzle 8 has a concave portion 8A which comes into contact with the annular protruding portion 7E, and a front wall portion 8B formed so as to cover the front side of the concave portion 8A.
- Horn portions 8C, 8C formed so as to oppose the front wall portion 8B in the vertical direction and protrude forward;
- Nozzle insertion hole 8D that is provided with the paint spray port 7C protruding and opened to the outside, and a number of atomization formed around the nozzle insertion hole 8D
- Air outlets 8 E, 8 E,... It is formed of pattern air outlets 8F, 8F, ... (only two are shown) that are formed and open diagonally inward.
- the air nozzle 8 ejects the atomizing air from the nozzle hole 8D and each atomizing air jet port 8E, so that the paint nozzle 7C of the paint nozzle 7 is sprayed.
- the sprayed paint is sprayed from each pattern air outlet 8F, and the sprayed paint pattern is formed into an oval or oval shape. That is what you do.
- Reference numeral 10 denotes a paint supply passage formed between the needle valve element 18 and the spray gun body 6, and the paint supply passage 10 has a front-side paint valve 16 to be described later.
- the paint valve 17 on the a side is connected, and the paint is at the ground potential through the paint supply passage 10.
- Reference numeral 11 denotes a paint discharge passage which is formed in the axial direction of the spray gun body 6 and connects the tip side of the paint supply passage 10 to an external waste ink tank, and is provided in the middle of the paint discharge passage 11. Is connected to a drain valve (not shown).
- Reference numeral 12 denotes an atomizing air supply passage formed in the spray gun body 6 in the axial direction.
- Reference numeral 13 denotes an external electrode provided radially outside the spray gun body 6, and the external electrode 13 is held by an external electrode holding section 14.
- the outer electrode holding portion 14 is made of an insulating resin material such as PTFE or PET, and has a large outer diameter portion 14A at the base end and a smaller diameter portion 14B at the distal end side. A portion between the diameter portion 14A and the small diameter portion 14B is formed in a rod shape to be a tapered portion 14C. Further, it is connected to a high-voltage generator (not shown) via a lead wire 15 connected to the base end of the external electrode holding section 14, and the high voltage from the high-voltage generator is External power via lead wire 15 It will be lined up with poles 13.
- Reference numerals 16 and 17 denote front-side paint valves which are located in the valve device mounting part 3 and are provided in the middle of the paint supply passage 10. The rear-side paint valves are indicated respectively.
- the paint valve 17 on the front side is connected to the paint tank and the color changing valve device at the ground potential together with the paint valve 16 on the front side.
- the paint valves 16 and 17 are configured as two-port two-position spring return type air switching valves that are switched by supply and discharge of compressed air. By opening both paint valves 16 and 17, paint from a color changing valve device (not shown) provided outside is supplied to paint nozzle 7. It has become.
- the valve element of the front-side paint valve 16 is a needle valve element 18 made of conductive metal as shown in FIG. 9, and the needle valve element 18 is, for example, a stainless steel line. It is formed of a conductive metal material such as. Then, the proximal end of the needle valve element 18 is fixed to the air-driven actuator, and the distal end extends in the axial direction of the spray gun body 6, and The tip 18 A of 18 is seated on the valve seat 7 B of the paint nozzle 7. As a result, when compressed air is supplied to the front-side paint valve 16, the distal end 18 A of the needle valve 18 moves away from the valve seat 7 B. As a result, the paint jet nozzle 7 is opened, and the paint in the paint supply passage 10 is jetted in front of the paint nozzle 7.
- an external electrode type spray gun type electrostatic coating apparatus allows the coating object to be coated. It can be painted.
- the paint particles sprayed from the paint spray 7C of the paint nozzle 7 are first discharged in the form of a liquid thread, and then sprayed. Is atomized by the action of atomized air from the atomized air outlet 8E, and forms a spray pattern of paint by the pattern air from the zero -turn air outlet 8F. It has become .
- the atomized paint particles are not always uniformly received the energy of the atomizing air, and the outer periphery of the spray pattern is disturbed due to differences in the particle size, flight speed, etc. A flow is generated, and paint particles that temporarily deviate from the spray pattern and stay around the air nozzle 8 are also generated.
- the paint nozzle 7 and the air nozzle 8 and the like formed of the insulating resin material are dielectrics, the surface thereof is migrated by a high voltage output from the external electrode 13.
- the eggplant charges since the paint nozzle 7 and the air nozzle 8 and the like formed of the insulating resin material are dielectrics, the surface thereof is migrated by a high voltage output from the external electrode 13. The eggplant charges.
- the paint deposited near the air nozzle 8 sometimes falls as a small diameter lump (so-called “painting bud”) from the painting device and adheres to the workpiece.
- the quality of the finished paint of the object is reduced.
- the present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a spray gun type static gun capable of quickly and negatively charging paint particles sprayed from a paint nozzle.
- the purpose is to provide electrocoating equipment. Disclosure of the invention
- the present invention provides a spray gun body, a paint nozzle provided on a tip side of the spray gun body, and spraying paint from a paint spray port toward an object to be coated; Paint that is provided in the main body and supplies and stops the paint supplied to the paint nozzle via the paint supply passage by opening and closing the needle valve to the paint nozzle.
- Paint that is provided in the main body and supplies and stops the paint supplied to the paint nozzle via the paint supply passage by opening and closing the needle valve to the paint nozzle.
- the spray gun main body is formed of an insulating material;
- a ground electrode is provided near the paint spray port.
- the present invention provides a spray gun main body and the sprayer.
- a paint nozzle that is provided on the tip side of the paint main body and sprays paint from the paint spray port toward the object to be coated; and a tip of the paint nozzle with the paint spray port opened to the outside.
- An air nozzle fixed to the spray gun body so as to cover the surface side; and a needle valve provided on the spray gun body and opening and closing a needle valve body with respect to the paint nozzle.
- a spray valve comprising a paint valve for supplying and stopping paint supplied to the paint nozzle through a paint supply passage, and an external electrode provided radially outside the spray gun body.
- the spray gun body and the air nozzle are formed of an insulating material, and a ground electrode is provided near the paint spray port.
- the paint particles just sprayed from the paint spray port can be sprayed at a state close to the ground potential.
- the particles reduce the effect of dielectric polarization due to the voltage difference between the paint spray port and the external electrode, and can be quickly negatively charged by the high negative voltage generated from the external electrode. it can.
- the paint nozzle is formed of a metal material, and the vicinity of the paint spray port of the paint nozzle is used as a ground electrode, whereby the paint nozzle of the paint nozzle is formed.
- the needle valve body of the paint valve is provided with an earth electrode protruding from the paint spray port of the paint nozzle, so that the paint sprayed in front of the paint spray port is provided.
- the particles can be brought to a state close to the ground potential.
- the present invention provides a method in which the paint nozzle is provided with only a paint spray port.
- the paint particles are grounded by using a conductive material, forming the other part with an insulating material, and using the paint nozzle near the paint spray port as a ground electrode. Spray can be performed at a state close to the potential.
- the earth electrode is set to the earth potential through the conductive paint flowing through the paint supply passage, and the earth electrode is connected to the conductive paint such as a water-based paint or a low-resistance paint. It can be a ground potential.
- the earth electrode has an earth potential via an earth wire, so that the earth electrode has an earth potential via an earth wire separately provided on a spray gun body or the like. be able to.
- FIG. 1 is a vertical sectional view of a main part showing a spray gun type electrostatic coating apparatus according to a first embodiment of the present invention.
- FIG. 2 is a vertical sectional view of a main part showing a modification of the first embodiment.
- FIG. 3 is a longitudinal sectional view of a main part showing a spray gun type electrostatic coating apparatus according to a second embodiment of the present invention.
- FIG. 4 is a vertical sectional view of a main part showing a modification of the second embodiment.
- FIG. 5 is a vertical sectional view of a main part showing a spray gun type electrostatic coating apparatus according to a third embodiment of the present invention.
- FIG. 6 is a vertical sectional view of an essential part showing a modification of the third embodiment.
- FIG. 7 is a longitudinal sectional view of a main part showing a modification in which an earth wire is used.
- Figure 8 shows a conventional spray gun type electrostatic coating equipment. It is a side view.
- FIG. 9 is a vertical sectional view showing a main part of a conventional spray gun type electrostatic coating apparatus.
- FIG. 1 shows a first embodiment.
- the same components as those of the above-described conventional technology are denoted by the same reference numerals, and the description thereof will be omitted.
- reference numeral 21 denotes a paint nozzle according to the present embodiment used in place of the paint nozzle 7 made of an insulating resin material according to the prior art. It is formed of a conductive metal material such as brass or stainless steel so as to be used as a ground electrode.
- the shape of the paint nozzle 21 is the same as that of the paint nozzle 7 according to the prior art, and the inside is formed as a paint passage, and the end side thereof is tapered.
- the paint nozzle 21 has a fitting portion 21 A fitted to the nozzle accommodating portion 6 A of the spray gun body 6, and a valve seat portion 2 on which the needle valve element 18 is detached. 1B, a paint spray port 2 1 formed at the tip of the valve seat 2 1B for spraying paint when the needle valve 18 is opened, and an outer peripheral side of the valve seat 2 1B.
- Atomized air passage 21D and a large-diameter annular protrusion located at the outer peripheral side of the atomized air passage 21D toward the tip end, and a recess 8A of the air nozzle 8 And an annular protruding portion 21E with which the abutment comes into contact.
- the paint spraying port 21C of the paint nozzle 21 projects from the nozzle insertion hole 8D of the air nozzle 8 and is attached to the outside by opening.
- the paint flowing through the paint supply line 10 is made a low-resistance paint such as a metallic paint or a water-based paint.
- the paint supply passage 10 By connecting a paint tank, a color changing valve device, and the like (not shown) to the ground, the paint supply passage 10 is set to the ground potential. Therefore, the paint nozzle 21 made of a conductive material becomes an earth potential through the paint supply passage 10 and the paint nozzle 21 near the paint nozzle 21 C is grounded. It is configured as a ground electrode. Further, since the needle valve element 18 is formed of a conductive metal material, the use of the paint nozzle 21 as a ground electrode is promoted together with the paint supply passage 10.
- the paint particles sprayed from the paint spray port 21C are applied to the paint spray nozzle 2C. 1 C near the paint electrode 21 and the external electrode 13, which serve as the ground electrode, become negative by the electrostatic field (ionization zone) for charging formed between the external electrode 13. Be charged. Then, the negatively charged paint particles are transported toward the workpiece by the transporting electrostatic field formed between the external electrode 13 and the workpiece, and are transferred to the workpiece. Painted on things.
- the spray gun body 6 and the air nozzle 8 are formed of an insulating resin material, and the paint nozzle 21 is formed of a metal material, and the paint nozzle 21 is coated with the paint nozzle 21.
- the spray port 21 C is provided so as to protrude from the front wall 8 B of the air nozzle 8.
- the paint nozzle 21 is connected to the ground via a low-resistance paint flowing through the paint supply passage 10, and near the paint spray port 21C of the paint nozzle 21.
- the paint spray port 21 The paint particles can be sprayed at a state close to the ground potential, and the effect of dielectric polarization due to the voltage difference between the paint spray port 21 C and the external electrode 13 can be reduced. . Therefore, the just-sprayed paint particles can be made electrically neutral (earth potential) without having a positive charge, and the spray paint particles are formed by the external electrode 13.
- the negative electrode can be quickly charged by the negative electrostatic field of the negative electrode. In particular, even paint particles that fall off the spray pattern and stay around the fan nozzle 8 can be quickly and negatively charged.
- the air nozzle 8 and the spray gun body 6 and the like are formed of an insulating resin material, the surface of the air nozzle 8 and the like is caused by the high voltage from the external electrode 13. Even when the paint particles are always negatively charged, the sprayed paint particles are immediately charged negatively, and the paint particles adhere to the air nozzle 8 or the like and become dirty. This can prevent the occurrence of paint bumps. Thus, the coating budding does not fall on the surface of the object to be coated and does not become dirty, and the finish of the coating on the surface of the object to be coated can be improved.
- the needle valve of the paint valve 16 is used.
- the needle valve 31 made of an insulating resin material was used. Is also good.
- the paint nozzle 21 can be used as a ground electrode through the low-resistance paint flowing through the paint supply passage 10, and the same operation and effect as in the first embodiment can be obtained. Obtainable.
- FIG. 3 shows a second embodiment.
- the feature of this embodiment is that a ground electrode protruding from the paint spray port is provided on the needle valve of the front paint valve 16. It is in.
- the book the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
- reference numeral 41 denotes a needle valve used in this embodiment instead of the needle valve 18 according to the first embodiment, and the needle valve 41 is a spray gun body 6.
- the distal end portion 41A of the needle valve element 41 is separated from and seated on a valve seat portion 7B of a paint nozzle 7 formed of an insulating resin material.
- Reference numeral 42 denotes an earth electrode provided in the needle valve element 41 in the axial direction.
- the base end of the earth electrode 42 is an air-driven arc of the front paint valve 16.
- the tip 42 A of the electrode 42 protrudes forward from the front wall 8 B of the air nozzle 8, and is connected to the ground via the cable.
- the paint particles sprayed from the paint spray port 7C are connected to the tip 42A of the ground electrode 42 having the ground potential. It is charged to negative charge by the charging electrostatic field formed between the external electrode 13 and the external electrode 13. The charged paint particles are transported toward the workpiece by the transporting electrostatic field formed between the external electrode 13 and the workpiece, and are applied to the workpiece.
- the paint particles sprayed from the paint spray 7 C are not applied to the tip of the ground electrode 42. Spraying while coming in contact with 42 A, spraying at a state close to the ground potential. Since the paint particles are at the earth potential, the effect of dielectric polarization due to the voltage difference between the paint spray port 7C and the external electrode 13 can be reduced. 3 negative static electricity formed by The negative charge can be quickly charged by the electric field area. As a result, even when the surface of the air nozzle 8 or the like made of an insulating resin material is charged to a negative charge, the sprayed paint particles adhere to the air nozzle 8 or the like.
- the needle of the paint valve 16 is used.
- the valve element 41 is formed of a metal material
- the needle valve element 51 is replaced with an insulating resin material as shown in FIG. Therefore, the tip 51A is formed so as to be separated from and seated on the valve seat 7B of the paint nozzle 7, and the needle valve 51 has a ground electrode having a tip 42A. 52 may be provided, and the same operation and effect as in the second embodiment can be obtained.
- the needle valve 41 made of a conductive metal and the ground electrode 42 may be integrally formed.
- FIG. 5 shows a third embodiment.
- the paint nozzle is formed of an insulating resin material and a conductive metal material.
- the same components as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
- reference numeral 61 denotes a paint nozzle according to the present embodiment, and the paint nozzle 61 has a fitting portion 61A, a valve seat portion 61B, a paint spray port 61C, which will be described later.
- the atomizing air passage 61D is formed of an insulating resin material, and the paint spray port 61C is formed of a separate conductive metal material, and is configured as a ground potential.
- the shape of the paint nozzle 61 is the same as the paint nozzle 7 according to the prior art, and the inside is formed as a paint passage.
- the rear end has a tapered shape, and a fitting portion 61A to be fitted into the nozzle accommodating portion 6A of the spray gun body 6, and a valve seat portion 61 from which the needle valve element 18 is detached and seated.
- B a paint spray port 61 formed of a conductive metal material on the tip side of the valve seat portion 61B and spraying paint when the twenty-first valve body 18 is opened.
- An atomizing air passage 61D formed on the outer peripheral side of the seat portion 61B, and a large-diameter annular projectingly formed toward the distal end located on the outer peripheral side of the atomizing air passage 61ID.
- the air nozzle 8 has an annular projection 61E with which the recess 8A of the air nozzle 8 contacts.
- the paint spray port 61C is formed of a conductive metal material
- the fitting portion 61A, the valve seat portion 61B, the annular projecting portion 61E, etc. are formed of an insulating resin material, and both are integrally molded with a resin.
- the paint nozzle 61 is made of an insulating material such as the fitting portion 61A, the valve seat portion 61B, and the annular projecting portion 61E.
- the paint spray port 61 C is at the ground potential.
- the paint particles sprayed from the paint spray port 61C of the paint nozzle 61 are set to the ground potential, as in the above-described embodiments, so that the paint particles can be connected to the external electrode.
- the negative charging can be immediately performed by the charging electrostatic field formed by the method 13, and the coating quality of the object to be coated can be improved.
- the needle valve element 18 of the paint valve 16 is formed of a metal material in the same manner as in the prior art, but in the present invention, as shown in FIG. A needle valve 31 formed of an insulating resin material may be used.
- the paint spray port 61C of the paint nozzle 61 can be used as a ground electrode through the low-pile paint flowing through the paint supply passage 10 and the third embodiment. The same operation and effect can be obtained.
- the earth potential was set by using the low-resistance paint flowing through the paint supply passage 10, but the present invention is not limited to this, and as shown in FIG.
- the paint nozzle 21 may be connected to an earth via a ground wire 71 provided in the spray gun main body 6, and similarly in other embodiments, the paint nozzle 21 may be connected to the ground.
- the wire may be built into the spray gun body 6.
- the spraying machine 4 is an atomizing air type spray gun, but a hydraulic atomizing spray gun using a lip-shaped nozzle tip as a paint nozzle.
- the liquid is atomized by discharging the high-pressure paint from the nozzle tip.
- the present invention provides a method of spraying paint by forming a spray gun body, an air nozzle, and the like from an insulating material and providing an earth electrode near the paint spray port.
- a method of spraying paint by forming a spray gun body, an air nozzle, and the like from an insulating material and providing an earth electrode near the paint spray port.
- the paint nozzle is formed of a conductive material. Accordingly, the paint spray port of the paint nozzle can be used as an earth electrode, and the paint particles can be sprayed at a state close to the earth potential. With this high voltage, the paint particles immediately after spraying are immediately negatively charged, and painting can be performed while preventing the spray gun body, air nozzles, and the like from becoming dirty.
- paint particles sprayed in front of the paint spray port are grounded.
- the paint particles immediately after spraying are immediately negatively charged due to the high voltage of the negative electrode from the external electrode, and the spray gun body, air nozzles, etc. become dirty. It is possible to paint while preventing it.
- the paint nozzle is formed of a conductive material only for the paint spray port, and the other portion is formed of an insulating material, so that the paint spray port of the paint nozzle is formed. It can be used as a ground electrode, and paint particles can be sprayed at a state close to the ground potential, and immediately after spraying by a high negative voltage from an external electrode. Paint particles can be negatively charged immediately.
- the earth electrode can be set to the earth potential via a conductive paint such as a water-based paint or a low-resistance paint flowing through a passage provided with the paint.
- a conductive paint such as a water-based paint or a low-resistance paint flowing through a passage provided with the paint.
- the earth electrode can be set to an earth potential via an earth wire separately provided on the spray gun body or the like.
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002179992A CA2179992C (en) | 1995-01-30 | 1996-01-17 | Spray gun type electrostatic painting apparatus |
AU44581/96A AU676810B2 (en) | 1995-01-30 | 1996-01-17 | Spray gun type electrostatic painting apparatus |
EP96900698A EP0756898A4 (en) | 1995-01-30 | 1996-01-17 | ELECTROSTATIC PAINT SPRAYER |
KR1019960703538A KR0185043B1 (ko) | 1995-01-30 | 1996-01-17 | 스프레이건식 정전도장장치 |
US08/704,678 US5765762A (en) | 1995-01-30 | 1996-01-17 | Spray gun type electrostatic paint coating machine |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3304695 | 1995-01-30 | ||
JP7/33046 | 1995-01-30 | ||
JP7/258191 | 1995-09-11 | ||
JP25819195 | 1995-09-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996023591A1 true WO1996023591A1 (fr) | 1996-08-08 |
Family
ID=26371683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1996/000053 WO1996023591A1 (fr) | 1995-01-30 | 1996-01-17 | Dispositif de peinture electrostatique de type aerographe |
Country Status (6)
Country | Link |
---|---|
US (1) | US5765762A (ja) |
EP (1) | EP0756898A4 (ja) |
KR (1) | KR0185043B1 (ja) |
AU (1) | AU676810B2 (ja) |
CA (1) | CA2179992C (ja) |
WO (1) | WO1996023591A1 (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0864367B1 (en) * | 1996-10-01 | 2002-11-27 | Abb K.K. | Rotary atomization head |
US6003794A (en) * | 1998-08-04 | 1999-12-21 | Progressive Grower Technologies, Inc. | Electrostatic spray module |
US20060118039A1 (en) * | 2004-11-03 | 2006-06-08 | Cooper Steven C | Spray device with touchless controls |
DE602005022755D1 (de) * | 2004-11-12 | 2010-09-16 | Mt Ind Inc | Elektrostatisches sprühdüsensystem |
US7913938B2 (en) * | 2004-11-12 | 2011-03-29 | Mystic Tan, Inc. | Electrostatic spray nozzle with adjustable fluid tip and interchangeable components |
US20060124779A1 (en) * | 2004-11-12 | 2006-06-15 | Cooper Steven C | Panel-mounted electrostatic spray nozzle system |
DE102005007242A1 (de) * | 2005-02-17 | 2006-08-24 | Itw Gema Ag | Druckluft-Drosselvorrichtung und Pulversprühbeschichtungsvorrichtung |
US9032565B2 (en) | 2009-12-16 | 2015-05-19 | Kohler Co. | Touchless faucet assembly and method of operation |
CN104245147B (zh) | 2012-04-12 | 2018-11-06 | 诺信公司 | 包括耐磨电极支撑件的粉末喷枪 |
ES2656157T3 (es) * | 2012-10-01 | 2018-02-23 | Graco Minnesota Inc. | Conjunto de punta de pulverización para pistola de pulverización electrostática |
Citations (3)
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JPS51130761U (ja) * | 1975-04-14 | 1976-10-21 | ||
JPH05501675A (ja) * | 1989-11-21 | 1993-04-02 | シックルズ、ジェイムズ・イー | 静電スプレーガン |
JPH06320065A (ja) * | 1993-05-07 | 1994-11-22 | Toyota Motor Corp | ベル型静電塗装装置 |
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US3393662A (en) * | 1964-12-30 | 1968-07-23 | Ronald J. Blackwell | Apparatus for electrostatic spray coating |
CA970861A (en) * | 1971-03-17 | 1975-07-08 | John A. Urban | Skid control system |
DE7401584U (de) * | 1973-04-06 | 1974-08-22 | Mueller E Kg | Vorrichtung zum elektrostatischen Überziehen von Gegenständen mit flüssigem oder pulverförmigem Material |
US4009829A (en) * | 1975-02-11 | 1977-03-01 | Ppg Industries, Inc. | Electrostatic spray coating apparatus |
US4079894A (en) * | 1976-07-14 | 1978-03-21 | Nordson Corporation | Electrostatic spray coating gun |
JPS5324366A (en) * | 1976-08-19 | 1978-03-07 | Hitachi Chemical Co Ltd | Method of manufacture of melamine resin decorative laminate |
JPS5523104A (en) * | 1978-02-20 | 1980-02-19 | Kasei Optonix Co Ltd | Luminescent composition and low speed electron beam-exciting fluorescent display tube |
JPS5638267A (en) * | 1979-09-05 | 1981-04-13 | Ricoh Co Ltd | Ink jet recorder |
US4440349A (en) * | 1979-09-17 | 1984-04-03 | Ppg Industries, Inc. | Electrostatic spray gun having increased surface area from which fluid particles can be formed |
JPS5713346A (en) * | 1980-06-27 | 1982-01-23 | Joko:Kk | Full automatic electrophoresis apparatus of cassette type |
JPS6057907B2 (ja) * | 1981-06-18 | 1985-12-17 | 工業技術院長 | 液体の混合噴霧化方法 |
JPS5822261A (ja) * | 1981-08-03 | 1983-02-09 | Canon Inc | シ−ト材取扱い装置 |
US4611762A (en) * | 1984-10-26 | 1986-09-16 | Nordson Corporation | Airless spray gun having tip discharge resistance |
US4771949A (en) * | 1984-10-29 | 1988-09-20 | Hermann Behr & Sohn Gmbh & Co. | Apparatus for electrostatic coating of objects |
GB8432274D0 (en) * | 1984-12-20 | 1985-01-30 | Ici Plc | Electrostatic spraying |
JPH06178452A (ja) * | 1992-12-09 | 1994-06-24 | Matsushita Electric Works Ltd | 充交両用電気機器 |
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1996
- 1996-01-17 KR KR1019960703538A patent/KR0185043B1/ko not_active IP Right Cessation
- 1996-01-17 US US08/704,678 patent/US5765762A/en not_active Expired - Fee Related
- 1996-01-17 AU AU44581/96A patent/AU676810B2/en not_active Ceased
- 1996-01-17 WO PCT/JP1996/000053 patent/WO1996023591A1/ja not_active Application Discontinuation
- 1996-01-17 EP EP96900698A patent/EP0756898A4/en not_active Withdrawn
- 1996-01-17 CA CA002179992A patent/CA2179992C/en not_active Expired - Fee Related
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JPS51130761U (ja) * | 1975-04-14 | 1976-10-21 | ||
JPH05501675A (ja) * | 1989-11-21 | 1993-04-02 | シックルズ、ジェイムズ・イー | 静電スプレーガン |
JPH06320065A (ja) * | 1993-05-07 | 1994-11-22 | Toyota Motor Corp | ベル型静電塗装装置 |
Non-Patent Citations (1)
Title |
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See also references of EP0756898A4 * |
Also Published As
Publication number | Publication date |
---|---|
AU4458196A (en) | 1996-08-21 |
EP0756898A4 (en) | 1998-02-04 |
AU676810B2 (en) | 1997-03-20 |
US5765762A (en) | 1998-06-16 |
CA2179992C (en) | 2000-12-12 |
KR0185043B1 (ko) | 1999-04-15 |
EP0756898A1 (en) | 1997-02-05 |
CA2179992A1 (en) | 1996-07-31 |
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