JPH02503648A - Spray coating equipment for conductive coating liquid - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Guide 0 ゛ ・shi 5 □ The invention relates to a spray coating device according to the preamble of claim (1).

In a preferred embodiment, the present invention relates to a spray coating apparatus for conductive coating fluids. spray The vessel is preferably a rotary atomizer.

Is spraying covered by the preamble of claim (1)? ! The device is in the prior art, German patent application It is clear from M15973TVa/75c that the electrode device is a ring. 0 located completely outside of both are connected to a high voltage.

Conductive coating fluids contain water or metal particles, especially for so-called metallic luster finishes. It is made of enamel. electrically attracted by a grounded covered object , it is customary to impart an electrostatic charge to the coating liquid before spraying. However, this Even though the storage container for coating liquid is at ground potential, the voltage is This includes the difficulty of returning the supply tube through the tube. Therefore, passing the coating liquid to cut off the reverse current path formed between the sprayer and the coating liquid supply device. Many efforts have been made to date. This type of device is described in German Patent No. 34 40381, German Patent No. 2937890, and British Patent No. 147 This is clear from Publication No. 8853. Also, US Pat. No. 3,393,662, German Patent No. 3,609,240, German Patent No. 3,716,776, US Pat. No. 4447008, U.S. Patent No. 3049092, and U.S. Patent No. It is also mentioned in Publication No. 3408985.

The problem existing with the present invention is to remove the sprayer from all coated material granular materials as much as possible. A simple but safe way to avoid voltage back-up to the coating material supply device through the It is to provide law.

This problem is solved according to the invention through the features of claim (1).

Due to the features of the invention, the gas flowing from the two gas passages is sprayed only in the cloud region. Transferring charge from the electrode to the sprayed coating material 6 Typically, the coating material is transferred from the gas to the coating material. Transfer of charge to the sprayed coating material occurs when the particles of the sprayed coating material are spaced far enough apart from each other to This is done in areas where there is no direct electrical path from the covering material to the atomizer. Conductivity The complicated process of disconnecting the voltage in each flow path in prior art material feed systems for coating fluids This eliminates the need for expensive equipment that requires frequent cleaning. child This makes this type of spraying considerably cheaper to manufacture and operate the coating equipment. Can be done. More uniform and strong charging of all particles of the sprayed coating material , are simultaneously achieved by the present invention.

The invention is particularly advantageous when connected to rotary atomizers, which are typically As is known, it has a circular, bell-shaped or cup shape and is used for the spraying of liquid coating materials. however, the present invention is not limited to those well-known A nozzle design for installations that spray liquid or powder coating materials. It's convenient for a sprayer (you can also use it as a toilet).

Further features of the invention are within the scope of the claims.

The invention will be described below by way of example with reference to the drawings and by preferred embodiments. be done.

FIG. 1 is a side view of the spray coating apparatus of the present invention.

FIG. 2 is a front view of the electrode device of the spray coating device of FIG. 1;

Figure 3 shows whether the spraying along the plane III-111 in Figure 2 is covered. ! Axial section of I device It is a diagram.

FIG. 4 is a detailed view of ■ in FIG. 3.

FIG. 5 is a side view, partially in section, of another embodiment of the spraying device according to the invention; It is.

6 is a front view of the apparatus of FIG. 5, viewed from the bottom of FIG. 5; FIG.

FIG. 7 shows a hose according to the invention.

FIG. 8 is an axial cross-sectional view of the section (■) in FIG. 5.

FIG. 9 shows how the spraying according to the present invention is applied. ! ! FIG. 7 is yet another cross-sectional view of the device.

The coating device 2 for spraying conductive coating solution shown in FIGS. 1 to 4 is rotated. The coating liquid is discharged from the outer edge 11, and the sprays located downstream thereof meet each other in the cloud region 8. The rotary bell-shaped rotary sprayer is equipped with a head 6, forming a cloud of coating liquid particles that are separated from each other. The spraying has means 4. This spraying is applied to the coating device 2 from a grounded liquid supply device. East 10 made up of several tubes that supply conductive coating fluid from and also supply solvent. is connected. The solvent, instead of the coating liquid, flows through the coating equipment and is separated. It is useful to clean the coating fluid before replacing it with another type of coating fluid or at the end of the working day. fulfill the eyes.

The electrode device 12 is supported by a ring 14 made of electrically insulating material. , the ring concentrically surrounds the spraying means 4. Downstream end of ring 14 The section 16 is spaced a distance 20 from the downstream end 18 of the rotating body 6, which distance is preferably Preferably, the distance between the outer edge 11 of the zero-rotating body 6 and the ring 14 is in the range of Omm to 50mm. The radial distance between the downstream end and the radial center 24 is indicated at 26; Preferably it is in the range of 50 mm to 250 mm. A number of electrodes 28 have a length of 30 Only the downstream end 16 protrudes outside the ring 14. Length 30 is preferred The range is from 0m to 50mm. The electrode 28 is uniform at the 16th downstream end. They are arranged along the periphery of the ring 14 with a uniform distribution, and are aligned with the rotational axis 32 of the rotating body 6. They run almost parallel. The ring 14 is secured by a strip 34 of electrically insulating material. Thus, it is connected to the installation part 36 of the rotary atomizer 4.

FIGS. 2 to 4 will be explained. The ring 14 has two ring parts, namely a mounting ring. a ring 40 and a gas guide ring 42, each ring being made of an electrically insulating material. ing. Gas guide ring 42 allows gas, preferably air, to receive charge from electrode 28. The pick-and-spray implants its charge into the cloud region 8, thereby causing a spray of conductive coating liquid. along the electrode 28 and its outer surface in such a way as to transfer charge to separate particles that are It plays the role of flowing gas.

A first gas passage 52 corresponding to the number of electrodes 28 is routed within the gas guide ring 42. It is formed parallel to the rotating axis 1Ji32. These each house one electrode 28. are arranged symmetrically around the annular gas guide ring 42, and the upper It extends from the square groove 47 of the downstream front section 72 to the downstream end 16 of the gas ring 42 .

The square groove 47 accommodates a ring-shaped conductor 80 to which the electrode 28 is connected. At least one first gas supply pipe 49 is provided between the conductor and the bottom of the square groove 47. A first rectangular passageway 78 is formed which is connected to the first square passageway 78 . The high voltage line 90 is the conductor 8 Connected to 0. Electrode 28 is swept by gas flowing through gas passageway 52 be done. The gas guide ring 42 is installed in a square groove 44 on the downstream side of the ring 40. The second rectangular passage left on both sides is connected to one gas supply pipe 48. has been done. The second gas passage 56 has a rectangular narrow groove or several small ring-shaped openings. The gas guide ring is installed from the square groove 44 on the downstream side 58 of the ring 40. extending radially outwardly to the outer surface 60 of the ring 42 . The gas flows through the second rectangular passage 46. from the second gas passageway 56 to the radially outer outer surface 60 and beyond. and then flows to the downstream end 16, at which point the gas is exposed to the protruding end of the electrode 28. 62 and further mixes with gas from first gas passage 52 .

Both gas streams pick up charges from electrode 28 and transfer those charges to the cloud region. 8, to the particles of the atomized conductive coating liquid. The third gas passage 66 is It has the shape of a ring-shaped narrow groove or an opening arranged in a ring shape, and the second square shape The mounting on the radially inner-outer surface 68 of the gas guide ring 42 from the passageway 46 is connected to the ring 40. It extends to the downstream side 58 of. Similarly, the gas in this third gas passage 56 is 8 along the protruding end portion 62 of the 8, mixes with other gases, and Both electrodes 28 transfer charge to the sprayed coating liquid particles. of electrical energy A high charge is transferred from the electrode to the particles of the conductive coating liquid sprayed, and the gas guide ring The outer surfaces 60 and 68 of 42 are therefore such that particles of coating liquid cannot pass to these outer surfaces. It is kept clean by preventing The gas is blown from the electrode device upstream from cloud region 8. This prevents the coating liquid particles from flowing back toward the ring 40, and the mounting is done on the outer surface 70 of the ring 40. are not contaminated by coating fluid.

As seen in FIGS. 3 and 4, the second gas passage 56 and the third gas passage 66 The installation is done through several small openings between the ring 40 and the gas guide ring 42. It is formed by It is provided on the spacer 44.

Separate gas supply pipes 49 and 47 connect the first gas passage 78.52 and the second and third gas passages 78.52. allows separate regulation and control of the gas supplied to the gas passages 56,66 of the.

The ring 14 has a wedge-shaped cross section that decreases in the downstream direction from the head 6. , the mounting ring has a significantly shorter axial length than the gas guide ring 42. The gas guide ring is particularly visible in the axial cross section from Figure 3 and Section 4. It has a triangular cross section. The outer surface 70 of the ring 40 is attached as shown in FIGS. According to Figure 4, they extend in an arcuate shape from each other. The overall cross-sectional shape of the ring 14 is Yes, the spraying is aerodynamic in the downstream direction from the head 6. The second gas passage 56 is , extending substantially parallel to the radially outer outer surface 60, the second gas passageway 66 is It extends generally parallel to the radially inner and outer surfaces 68 of the guide ring 42 . these gases The passages are very short, and the gas discharge directions of the second and third gas passages 56 and 66 are These gas flows flow along the outer surface 60, 68 of the gas guide ring 42 at the downstream end 1. It is selected to sweep in the direction of 6 without moving away.

Another embodiment of the invention, as shown in FIGS. Generates a uniform volume distribution of gas flowing out from the angular body around the area, and at the same time, Provides a high electrical potential to the sprayed coating material. At the same time, it prevents contamination of the ring and electrode device. It has stopped.

The uniform volume distribution of the effluent air around the sprayed coating material the body outlet opening is formed in a hose or tube made of flexible material; This can be achieved, for example, by punching. These gas release openings should be connected to hoses or If a small opening is formed in the wall when the tube is introduced at one end, The gas does not proceed to the other end, but instead flows out through the opening in the wall already at the entrance to the tube. It is based on fact. For this purpose, the opening in the wall is sufficiently smaller than the inner diameter of the tube. It has a small diameter. The ratio of the internal diameter of the gas outlet opening to the internal diameter of the hose is small The more uniform the gas distribution over the entire length of the hose. outlet opening For hose inner diameters of 2.7 mm to 3 mm, preferably Q, 2 mm It has an inner diameter of 0.5 mm to 0.5 mm. This is a hole of about 0.06 to 0.18. corresponds to the ratio of the internal diameter, i.e. cross-sectional dimension, of the gas outlet opening to the internal diameter of the gas outlet. Ru. The gas outlet opening is approximately 0.033 to 0.37 to the inside diameter of the hose. Even if it is in the range of 0.1 mm to 1 mm, corresponding to the inner diameter ratio of the exit opening , good results are achieved with the features of the invention.

The device 2/2 shown in FIGS. 5 to 8 for electrostatically coating the product is bell-shaped or circular. Type rotary spraying has a head 6/2 Spraying has a means 4/2 0 rotation spraying has a head 6/2 The head 6/2 is, for example, a turbine shaft supporting the spray head 6/2. It is driven by an air turbine 14/2 with 15/2. Material supply pipe 16/ 2, the 0-rotation spray serves to supply coating material to the head 6/2. The rotary spray head 6/2 emits the coating material approximately radially from the outer edge 11/2 of the head. put out This radially ejected coating material has a ring-shaped cross-section gas flow 5/2 is urged forward in the direction of the arrow 9/2 by the sprayed coating material 10/2. The shape of the funnel-shaped cone is given. The formed gas flow 5/2 is ring-shaped It flows out from the opening means 7/2, i.e. the annular opening, which means that the spraying means 4 /2 rotary spray is formed at the rear of the head. In addition, the gas jet 18/2 (rear force) flows into the funnel-shaped coating liquid flow 10/2, forming a gas envelope surrounding it. do. This additional gas jet, preferably air jet C, is by 1 length 20/2. These gases are transferred from the ring force to three holes made of a single material. gas outlet openings 22/2 formed in the walls of the bases 26/2, 28/2 and 30/2; and exits through a 24/2 ring-shaped means. 3 hoses 26/2.28/ 2.30/2 extends along three different annular diameters, each with the current body 2 0/2 and separate gas supply pipes 32/2, 34/2 and 36/ 2 and pressure regulating means 38/2. Gas supply means through 40/2 and 42/2. , preferably connected to the C maniac compressor 44/2. Due to this , adjust the gas pressure separately for each gas supply pipe 32/2, 34/2 and 36/2 or program-based contingency. It can be controlled by a computer using el.

The average ring diameter 46/2 of the outer hose 28/2 arranged in a ring is larger than the average ring diameter 48/2 of the central hose 26/2 arranged in , the hose 30/2 arranged in a ring shape and located on the outermost radial side The average ring diameter of 50/2 is the average diameter of the central hose of intermediate size 26/2 in diameter. 48/2, three ring-shaped hoses in axial section 26/2. 28/2 and 30/2 are rings 20 in the shape of a triangle, as shown in Figure 4. /2 are placed at the three corners of the longitudinal section, and the central ring 26/2 is located at the front. and the two other hoses 28/2 and 30/2 are spaced apart at the rear. Ru. A conductor 52/2 is disposed in the ring 20/2, and a number of conductors 52/2 are arranged on the ring 20/2. needle-like electrodes 54/2 are interconnected. The electrode 54/2 is connected to the hose 26. Diameter placed in front of the intermediate dimension so that it is swept by the gas exiting from /2 the gas outlet opening 24/2 of this hose. 2 and is slightly separated from the opening rim. In this process , the gas picks up and takes charges from the electrodes, and the coating material 10/2 is sprayed with those charges. to communicate. The electrode points 56/2 project a short distance from the ring 20/2. . Gas outlet openings of radially inner hose 30/2 and radially outer hose 28/2 The gas flowing out from the portion 22/2 is radially inward and radially outward of the ring 20/2. The flow is along the outer circumferential surfaces 62/2 and 60/2 of the side, and the spray is in the direction 9/2, at just one point. □converge into a triangular shape, keeping these surfaces clean, then the intermediate ring 26/ Electricity is extracted from these gases by mixing with the gases flowing out from the gas outlet openings 24/2 of 2. The receiver takes up the load, so that the charge follows further and further from the electrode 54/2 and is thereby This gas increases the charge on the sprayed coating material 10/2. intermediate hose 26 /2 is the point where the outer surfaces 60/2 and 62/2 of the ring 20/2 converge into a nearly triangular shape It is located approximately in Due to this pointed shape, around the outer surface of the pointed part, A gas flow similar to that of an airplane wing is created, which attracts dirty particles, especially coatings. No material will be deposited on sharp points, therefore the ring 20/2 will not be sprayed. Although it does not actually have a front plate for the coating material, it sweeps the gas in the area of the electrode 54/2. It has an edge 64/2 which is curved and interrupts the flow. The electrode is a high voltage cable 6 6/2 is connected to the high voltage side of the voltage generating means 68/2, and the voltage generating means 68/2 is connected to the high voltage side of the voltage generating means 68/2. The means for spraying is an integral part of device 2/2, and is connected to a low voltage supply device (not shown). Connection can be made through a low voltage cable 70/2. The FM device to be sprayed is It is surrounded by a housing 72/2 made of electrically insulating material.

The stay 74/2 attached to this housing 72/2 is the ring 20/2. is supported. The stay 74/2 passes through the rail 76/2 parallel to the axial direction. , the other two outer peripheral surfaces are outer surfaces 60/2 and 62/2, a triangular cross-section ring 20 /2 is connected to the third surface 78/2. Hoses 28/2 and 30/2 are It is located at the outer corner 80/2 and the inner corner 82/2 of the triangle.

For example, 30 gas outlet openings 22/2 or 24/2 are formed around the entire circumference of the ring 20/2, and each of the hoses 26/2, 28/2 and 30/2 evenly distributed. The electrode 54/2 is connected to the ring-shaped central hose 2 6/2 gas outlet openings 24/2 each. In Figure 6, the opening 22/2.24/2 and not all of the electrodes 54/2 are shown; However, a preferred embodiment with 30 gas outlet openings 22/2 or 24/2 It can be seen that in the example the outlet openings are arranged at a mutual spacing of 12 degrees. So Therefore, ring 20/2 has an outer diameter of about 465 mm and an inner diameter of about 355 mm. When the openings 22/2 and 24/2 are spaced apart from each other by approximately 10 mm in the circumferential direction 84/2 have. Hose 26/2 arranged in the middle in a ring shape and a ring shape inside The hose 30/2 located in the preferred embodiment has an outer diameter 86/2 of 5 mm and It has an inner diameter of 88/2 and 3 nm. The ring-shaped outer hose 28/2 is preferably In a new embodiment, it has an outer diameter 86/2 of 4 mm and an inner diameter 88/2 of 2.7 mm. There is. The various inner diameter dimensions of the hoses 26/2, 28/2 and 30/2 are Due to the hose diameter and therefore also having different lengths, each hose has a different flow rate. Gas outlet openings on hoses 26/2, 28/2 and 30/2 to balance the resistance and rush. The diameter 90/2 of the mouths 22/2 and 24/2 is an amount between 0.1 and 0.8 mm. It is preferably in the range of 0.2 to 0.5 mm. intermediate hose 26/2 The diameter of the gas outlet openings 24/2 is such that the electrodes 54/2 Gas flows out of the hose between the opening rim and the electrode 54/2 protruding through /2. Due to the small space required, two outer and inner hoses 28/ 2 and 30/2 are somewhat larger than the diameter of the gas outlet opening 22/2. Ru. Outlet openings 22/2 and 24/2 pass the needle through the hose wall 92/2. It can be easily formed by Another possibility is to use a gas release opening It is punching out. Hose 26/2 as shown in FIG. 7 for hose 30/2 2.28/2 and 30/2 can be formed from straight hose sections, the straight The part is bent into a circle and the ends 94/2 and 96/ are joined by insert pins 98/2. Connected by 2.

The cross section ■ shown in Fig. 5 is enlarged in Fig. 8. As can be seen from this figure, the gas inlet A mouth opening 100/2 is formed in the wall 92/2 of each hose; , having an inner diameter many times larger than the inner diameter of the gas outlet openings 22/2 and 24/2. There is. Gas inlet openings 100/2 are connected to gas supply pipes 32/2, 34/2 and 34/2, respectively. 36/2 is connected to part 102/2. The gas supply pipe section 102/2 is Annular plane 10 of hoses 26/2, 28/2 and 30/2 arranged in a ring shape It extends perpendicular to 4/2. Each hose 26/2, 28/2 and 30/2 , the gas inlet opening 100/2 of the hose is in the longitudinal passage of the gas supply pipe section 102/2. 108/2 through the lateral hole 106/2 of the gas supply pipe section 102/2. It's extending. The inner hose 30/2 is located within the radially inner square chamber 112/2. and the radially outer hose 28/2 is housed in the same outer chamber reversed with a mirror. 114/2 and the middle forwardly offset hose 26/2 is housed in the middle corner. It is housed in the shaped chamber 116/2. The gas outlet 118/2 is connected to the inner square chamber 11 2/2 to the radially inner outer peripheral surface 62/2 of the triangular body 20/2, and the gas Outlet 120/2 extends from the radially outer square chamber 114/2 into one half of the triangular body 20/2. It extends to the radially outer peripheral surface 60/2. Further, the gas outlet 122/2 has an intermediate angle It extends from the shaped chamber 116/2 in the direction of the triangular point 64/2, which is connected to the two This is the point where the outer peripheral surfaces 60/2 and 62/2 converge into a triangular shape. hose gas outlet Openings 22/2 and 24/2 connect these gas outlets 118/2, 120/2 and It faces each direction of 22/2. The electrode 54/2 is a ring-shaped conductor 52 /2, and passes through the intermediate hose 26/2 to approximately the triangular point. It extends to 64/2. The ring 20/2 has two main parts: the upstream Side mounting includes ring 130/2 and downstream gas guide ring 13 attached to it. It consists of 2/2. For installation, the axial length of ring 130/2 is flat throughout. a gas guide ring 13 which is considerably shorter than its radial width so as to be ring-shaped; 2/2 is attached to the triangular surfaces 60/2 and 62/2, and the front surface 13 of the ring 130/2 is attached. It has a triangular shape with a third triangular surface 136/2 bounded by 8/2. Inward The square chamber 112/2 and the outer square chamber 114/2 are two tables bounding each other. surface 1 of the gas guide ring 132, formed between surfaces 136/2 and 138/2; 36/2, a ring-shaped recess 140/2 is provided, in which a central It is formed for the intergonal chamber 116/2 or for the intermediate hose 26/2 and for the electrode 54. /2 and accommodates a ring-shaped conductor 52/2. hoses, electrodes and connections Everything consists of two parts: the mounting ring 130/2 and the gas guide ring 1. It is held between 33/2. The parts installed there are attached to ring 13. By separating the gas guide ring 132/2 from the Can be assembled quickly, no hoses or fasteners required to connect them It is.

Another embodiment of the spraying means 2/3 of the present invention shown in FIG. Although it does not feature a head, the installed sprayer is equipped with a nozzle 150. All other things All parts are the same as those in the embodiment shown in FIGS. 5 to 8, so they will not be explained again. However, the spraying has the coating material supply pipe 16/2 missing at the nozzle 150. are doing.

In the embodiments according to FIGS. 5 to 9, the plastic or metal 1, for example copper Or a ring-shaped tube made of aluminum is the preferred hose 26/2.2. Can be used in place of 8/2 and 30/2.

Submission of translation of written amendment (Article 184-8 of the Patent Law) Yoshi, Commissioner of the Patent Office 1) Takeshi Moon 1. Indication of patent application PCT/US 881021072, name of invention Spraying for conductive coating liquid is done by coating device 3, patent applicant Name: Landsburg Corporation 5, Date of submission of written amendment: 1 July 24, 989 6, List of attached documents The scope of the claims 1. The atomizer has an atomizer axis along which the atomizer emits an atomizer. The material to be coated is transferred by the sprayer towards the product to be coated; has a plane substantially perpendicular to the vessel axis and discharges the material to be atomized by the atomizer; the position is approximately within said plane and the material ejected by said atomizer is within said plane. A nebulizer electrode emitted generally along an axis in a first direction away from a first side. In the assembly, the electrode assembly includes an electrode holder defining a planar curve, and a plurality of electrode holders defining a planar curve. an electrode, wherein the electrode holder holds the electrodes in a direction spaced apart from each other by a certain distance. the electrode holder is held in the first direction toward the plane, and the electrode holder is held in the first direction toward the plane. first and second surfaces inclined in the direction of From the side of 2, the said! towards the said plane! 1 of the electrode holder toward the direction of means for forming a first opening on one side of the electrode holder; The electrode holder is further arranged at regular intervals along the first surface. refers to a second stream or streams of gas or gas mixtures at overpressure along a second opening or openings in the electrode holder for directing a third unit of gas or gas mixture at overpressure along said second surface; A third singular in the electrode holder for directing the number or plurality of streams. or means provided with a plurality of openings, the gas or gas mixture is The second and third streams of mixture collide with each other near the first opening and The electrode holder further extends the electrode into the first opening so that the electrode means for fixing the electrode to a holder; and means for extending the electrode in the first direction toward the plane. supporting the electrode holder on a second side of the plane adjacent to the nebulizer; means for generally isolating said electrode electrically from said nebulizer; and an electrostatic charge potential. means for connecting said electrode to said electrostatic potential supply means; , means for supplying a gas or gas mixture to the first opening at a low overpressure; Equipped with an electrode assembly for the nebulizer.

2. The atomizer is a rotary atomizer, and further includes an electric motor and a rotary atomizer in front. means for connecting to an electric motor, the rotary atomizer being actuated by operation of the electric motor. and further comprising means for supplying material to be atomized to the rotary atomizer; 2. The nebulizer electrode assembly of claim 1, wherein said axis coincides with the axis of rotation of said nebulizer. .

3. The atomizer comprises a nozzle and means for supplying the material to be atomized to the nozzle; The nebulizer electrode assembly of claim 1 comprising:

4. Supplying a gas or gas mixture at overpressure to the nozzle for atomization of the material; 4. The nebulizer electrode assembly of claim 3, further comprising means for.

5. The nebulizer electrode assembly of claim 1, wherein said planar curve comprises a closed planar curve.

6. The nebulizer electrode assembly of claim 5, wherein said closed planar curve is a circle.

7. The electrode holder holds the electrodes in a substantially evenly spaced manner. An electrode assembly for a nebulizer according to claim 1.

8. The atomizer is a rotary atomizer, and further includes an electric motor and a rotary atomizer in front. means for connecting to an electric motor, the rotary atomizer being actuated by operation of the electric motor. and further comprising means for supplying material to be atomized to the rotary atomizer; 2. The nebulizer electrode assembly of claim 1, wherein said axis coincides with the axis of rotation of said nebulizer. .

9. The atomizer has an atomizer axis along which the atomizer emits a The material to be coated is transferred by the sprayer towards the product to be coated; has a plane substantially perpendicular to the vessel axis and discharges the material to be atomized by the atomizer; the position is approximately within said plane and the material ejected by said atomizer is within said plane. A nebulizer electrode emitted generally along an axis in a first direction away from a first side. In the assembly, the electrode assembly includes an electrode holder defining a planar curve, and a plurality of electrode holders defining a planar curve. an electrode, wherein the electrode holder holds the electrodes in a direction spaced apart from each other by a certain distance. means for supporting the electrode toward the plane; and means extending the electrode in the first direction toward the plane. means for supporting the electrode holder on a second side of the plane adjacent the nebulizer; and means for connecting said electrode to said electrostatic charge potential supply means; and said atomizer. means for electrically insulating said electrode generally from said electrode holder, said electrode holder comprising: , furthermore, a first and a first direction inclined toward each other in the first direction toward the plane; and a second surface, and a first unit of a gas or gas mixture at an overpressure along said first surface. a first singular in said electrode holder for directing the number or plurality of streams; or means having a plurality of openings and a gas atmosphere at an overpressure along said second surface; or to direct the second stream or streams of gas mixture. and means for providing a second opening or openings in the pole holder. , the first and cylindrical body of the gas or gas mixture.

10. The means for holding the electrodes arranged at regular intervals from each other is arranged on the plane of the plane. forming a third opening or openings on a side facing the first direction from the second side; and an electrode extending into said third opening or openings. 10. The nebulizer electrode assembly of claim 9, further comprising means for securing to said electrode holder. .

11. The atomizer comprises a rotary atomizer, and further comprises an electric motor and the rotary atomizer. means for connecting to the electric motor, the rotary spraying being caused by operation of the electric motor. means for rotating the device and further comprising means for supplying the material to be atomized to the rotary atomizer. 11. The electrode assembly for a sprayer according to claim 10, wherein the axis coincides with the rotational axis of the sprayer. Three-dimensional.

12. The atomizer comprises a nozzle and means for supplying material to be atomized to the nozzle. 12. The nebulizer electrode assembly of claim 11, comprising: .

13. Providing a gas or gas mixture at overpressure to the nozzle for atomization of the material; 13. The nebulizer electrode assembly of claim 12, further comprising means for supplying.

14. The electrode assembly for a sprayer according to claim 11, wherein the planar curve is a closed planar curve. Three-dimensional.

15. The nebulizer electrode assembly of claim 14, wherein said closed planar curve is a circle.

16. The electrode holder holds the electrodes in substantially evenly spaced relation to each other. The nebulizer electrode assembly of claim 11.

17. The atomizer comprises a rotary atomizer, and further comprises an electric motor and the rotary atomizer. means for connecting to the electric motor to supply the electric material to the rotary atomizer. 10. The atomizer according to claim 9, further comprising means for supplying the atomizer, the axis of which is coincident with the axis of rotation of the atomizer. Electrode assembly for nebulizer.

18. The sprayer comprises a nozzle and means for supplying the material to be *i to the nozzle. 10. The nebulizer electrode assembly of claim 9, comprising: .

19. Providing a gas or gas mixture at overpressure to the nozzle for atomization of the material; 20. The nebulizer electrode assembly of claim 18, further comprising means for supplying.

20. The electrode assembly for a nebulizer according to claim 9, wherein the planar curve comprises a closed planar curve. .

21. The nebulizer electrode assembly of claim 20, wherein said closed planar curve is a circle.

22. The electrode holder holds the electrodes in substantially evenly spaced relation to each other. The nebulizer electrode assembly of claim 9.

23. The nebulizer electrode assembly of claim 22, wherein said closed planar curve is a circle.

24. The electrode holder holds the electrodes in substantially evenly spaced relation to each other. The nebulizer electrode assembly of claim 9.

25. When spraying the coating material, spray the cloud area (8) located downstream from the head. The sprayer that sprays the product to be coated through the sprayer has a head, and the electrode means (12) The spray is radially spaced apart from and surrounding the means (4), said spray extending outside the cloud region (8). Located on the upstream side. has at least one electrode (28) and is sprayed with The ring (14) serves to impart an electrostatic charge to the coating material, and the ring (14) The electrode (28) is supported on the outer upstream side of the first gas passage (52, 78). ) is on the ring (14). ), the spray of the sprayer (4) is directed towards the snow area (8) at least a second gas passageway (56) flowing to the downstream end (16) of the ring outer surface; , 66), and the ring (14) is connected to the second gas passage (56). , 66) from the end (16) downstream from the outer surface (60, 68) and forward. The gas is mixed with the gas from the first gas passage (52), and together with this gas, the spray is applied to the cloud region. have a cross-sectional dimension that decreases at the downstream end so as to flow into the zone (8); Does the spraying feature feature cover? ! Device.

26, the electrode (28) extending through the first gas passageway (52); The downstream end of the gas passage is located approximately at the gas outlet opening of the first gas passage (52). 26. The spray coating device according to claim 25, wherein

27, said electrode (28) extending through said first gas passageway (52); Claim 2, characterized in that the gas passage protrudes downstream from the first gas passage (52). 5 is a coating device.

28. The ring (14) has a downstream shape with a wedge-shaped decreasing cross section. The spraying according to any one of claims 25 to 27 is characterized in that: ! Device.

29, the ring (14) has an aerodynamic wedge on the downstream side in the axial cross section; The discharge direction of the second gas passage (56, 661) is the same as that of the gas flow. sweeps along the outer surface (60, 68) of said ring (14) without separating; 29. The spray coating device of claim 28, wherein the spray coating device is selected.

30, the second gas passage (50) disappears at the radially outward outer surface (60); , the third gas passage M f661 is extinguished at the radially inner and outer surfaces (68) of the ring (14). Claims 25 to 27, characterized in that all the electrodes (2 8) are connected to each other by a ring-shaped conductor (8D) made of electrically insulating material. 28. A spray coating apparatus according to any one of claims 25 to 27.

32, at least two gas passages (52, 78, 56, 661 with separate gas supply These gas passages are connected to supply pipes (48, 49), and these gas passages are characterized in that the gas supplied to the can be adjusted and controlled separately and independently A spray coating apparatus according to any one of claims 25 to 27.

33. The ring (14) consists of at least two ring-shaped parts, The gas passages (52, 78, 56, 6 6) and an electrode (28) are arranged. Either spraying is a coating device.

34, at least one of the first and further gas passages (52, 78, 56, 66); A ring-shaped hose (26/2.28/2 ．． 30/2), or is characterized by being formed by a ring-shaped tube A spray coating apparatus according to any one of claims 25 to 27.

35. The hose (26/2.28/2.30/2) or tube is The spraying method according to claim 34, wherein each passage has a different inner diameter cross-sectional dimension. is a coating device.

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Claims (1)

[Claims] 1. The atomizer has an atomizer axis along which the atomizer emits an atomizer. The material to be coated is transferred by the sprayer towards the product to be coated; has a plane substantially perpendicular to the vessel axis and discharges the material to be atomized by the atomizer; the position is approximately within said plane and the material ejected by said atomizer is within said plane. A nebulizer electrode emitted generally along an axis in a first direction away from a first side. In the assembly, the electrode assembly includes an electrode holder defining a planar curve, and a plurality of electrode holders defining a planar curve. an electrode, wherein the electrode holder holds the electrodes in a direction spaced apart from each other by a certain distance. and the electrode holder is held toward a second side of the plane opposite to the first side. from the side, towards the first direction towards the plane, one of the electrode holders. means for forming a first opening on a side of the electrode holder; The electrode holder is arranged at regular intervals along the means for extending into the opening of the electrode holder and fixing the electrode to the electrode holder; in front on a second side of the plane adjacent the atomizer, extending in the first direction towards the plane; supporting the electrode holder and generally insulating the electrode electrically from the nebulizer; means for supplying the electrostatic charge potential; and means for supplying the electrostatic potential to the electrode. means for connecting to a means for supplying a gas or gas to said first opening at a low overpressure; an electrode assembly for a nebulizer comprising: means for delivering a body mixture; 2. The electrode holders further extend toward each other in the first direction toward the plane. first and second surfaces that are inclined in a direction; and a gas or said electrode hole for directing the second stream or streams of gas mixture. means for providing a second opening or openings in the router; Directing a third flow or streams of gas or gas mixture at overpressure along a surface A third opening or openings are provided in the electrode holder for directing the electrode. and means for controlling said second and third streams of said gas or gas mixture. the nebulizer electrode assembly colliding with each other in the vicinity of the first opening; 3. The atomizer comprises a rotary atomizer, and further includes an electric motor and a rotary atomizer in front of the rotary atomizer. means for connecting to an electric motor, the rotary atomizer being actuated by operation of the electric motor. and further comprising means for supplying material to be atomized to the rotary atomizer; 3. The nebulizer electrode assembly of claim 2, wherein said axis coincides with the axis of rotation of said nebulizer. . 4. the atomizer comprising a nozzle and means for supplying material to be atomized to the nozzle; 3. The nebulizer electrode assembly of claim 2, comprising: 5. supplying a gas or gas mixture at overpressure to the nozzle for atomization of the material; 5. The nebulizer electrode assembly of claim 4, further comprising means for. 6. 3. The nebulizer electrode assembly of claim 2, wherein said planar curve comprises a closed planar curve. 7. 7. The nebulizer electrode assembly of claim 6, wherein said closed planar curve is a circle. 8. The electrode holder holds the electrodes in substantially evenly spaced relation to each other. The electrode assembly for a sprayer according to claim 2. 9. The atomizer comprises a rotary atomizer, and further includes an electric motor and a rotary atomizer in front of the rotary atomizer. means for connecting to an electric motor, the rotary atomizer being actuated by operation of the electric motor. and further comprising means for supplying material to be atomized to the rotary atomizer; 2. The nebulizer electrode assembly of claim 1, wherein said axis coincides with the axis of rotation of said nebulizer. . 10. The atomizer comprises a nozzle and means for supplying material to be atomized to the nozzle. 2. The nebulizer electrode assembly of claim 1, comprising: . 11. Providing a gas or gas mixture at overpressure to the nozzle for atomization of the material. 11. The nebulizer electrode assembly of claim 10, further comprising means for supplying. 12. 2. The nebulizer electrode assembly of claim 1, wherein said planar curve comprises a closed planar curve. . 13. 13. The nebulizer electrode assembly of claim 12, wherein said closed planar curve is a circle. 14. The electrode holder holds the electrodes in substantially evenly spaced relation to each other. The nebulizer electrode assembly of claim 1. 15. The atomizer has an atomizer axis along which the atomizer emits The material that was moving towards the product to be coated by said sprayer; having a plane substantially perpendicular to the atomizer axis and discharging the material atomized by the atomizer; a position substantially within said plane, and the material ejected by said atomizer lies substantially within said plane. a nebulizer electric current emitted generally along an axis in a first direction away from a first side of the nebulizer; The electrode assembly includes an electrode holder defining a planar curve and a plurality of electrode holders defining a planar curve. electrodes, and the electrode holder is arranged such that the electrodes are spaced apart from each other at a certain distance. means for supporting the electrode in the first direction toward the plane; a hand supporting the electrode holder on a second side of the plane adjacent to the nebulizer; a step, means for connecting said electrode to said electrostatic charge potential supply means, and said atomizing means. means for generally insulating the electrode electrically from the electrode holder; furthermore, the first planes are tilted toward each other in the first direction toward the plane. and a first surface of a gas or gas mixture at an overpressure along said first surface. A first unit is provided within the electrode holder for directing the flow or streams. means for providing a number or plurality of openings and a gas at an overpressure along said second surface; or for directing a second stream or streams of gas mixture. means for providing a second opening or openings in the electrode holder; The first and second flows of the gas or gas mixture are arranged in the vicinity of the electrode. The electrode assemblies for the nebulizer collide with each other. 16. The means for holding the electrodes arranged at regular intervals from each other is arranged on the plane. forming a third opening or openings on a side facing the first direction from the second side; and an electrode extending into said third opening or openings. 16. The nebulizer electrode assembly of claim 15, further comprising means for securing to the electrode holder. body. 17. The atomizer comprises a rotary atomizer, and further includes an electric motor and the rotary atomizer. means for connecting to the electric motor, the rotary spraying being caused by operation of the electric motor. means for rotating the device and further comprising means for supplying the material to be atomized to the rotary atomizer. 17. The electrode assembly for an atomizer according to claim 16, wherein the axis coincides with the axis of rotation of the atomizer. Three-dimensional. 18. The atomizer comprises a nozzle and means for supplying material to be atomized to the nozzle. 18. The nebulizer electrode assembly of claim 17, comprising: . 19. Providing a gas or gas mixture at overpressure to the nozzle for atomization of the material. 20. The nebulizer electrode assembly of claim 18, further comprising means for supplying. 20. 18. The nebulizer electrode assembly of claim 17, wherein said planar curve comprises a closed planar curve. body. 21. 21. The nebulizer electrode assembly of claim 20, wherein said closed planar curve is a circle. 22. The electrode holder holds the electrodes in substantially evenly spaced relation to each other. 18. The nebulizer electrode assembly of claim 17. 23. The atomizer comprises a rotary atomizer, and further includes an electric motor and the rotary atomizer. means for connecting to the electric motor, the rotary spraying being caused by operation of the electric motor. means for rotating the device and further comprising means for supplying the material to be atomized to the rotary atomizer. 16. The electrode assembly for an atomizer according to claim 15, wherein the axis coincides with the rotational axis of the atomizer. Three-dimensional. 24. The atomizer comprises a nozzle and means for supplying material to be atomized to the nozzle. 16. The nebulizer electrode assembly of claim 15, comprising: . 25. Providing a gas or gas mixture at overpressure to the nozzle for atomization of the material. 25. The nebulizer electrode assembly of claim 24, further comprising means for supplying. 26. 16. The nebulizer electrode assembly of claim 15, wherein said planar curve comprises a rectangular planar curve. body. 27. 27. The nebulizer electrode assembly of claim 26, wherein said closed planar curve is a circle. 28. The electrode holder holds the electrodes in substantially evenly spaced relation to each other. 16. The nebulizer electrode assembly of claim 15. 29. The coating material is applied to the spray cloud area (8) located downstream from the spray head. the electrode means (12) having a spray head for spraying the product to be coated through the spray head; radially away from and surrounding the application means (4) and outside said spray cloud region (8). at least one electrode (28) located upstream of the sprayed The ring ▽ (14) serves to impart an electrostatic charge to the coating material, and the ring ▽ (14) The electrode (28) is supported on the outer upstream side of the first gas passage (52, 7). 8) in the spray coating means comprising spray means in the ring (14); The gas is directed along the outer surface (60, 68) of the ring (14) by the spray cloud of the atomizer (4). At least the first Two gas passages (56, 66) are provided, and the ring (14) The gas in the gas passages (56, 66) of No. 2 flows downstream from the end (16) to the outer surface (60). , 68) to mix with the gas from the first gas passageway (52) and to mix with the gas from the first gas passageway (52). The cross-sectional dimension decreases at the downstream end as it flows into the spray cloud region (8). A spray coating device comprising: 30. The electrode (28) extends through the first gas passageway (52) and The downstream end of the gas passage is located approximately at the gas outlet opening of the first gas passage (52). 30. The spray coating apparatus according to claim 29, wherein the spray coating apparatus further comprises: 31. The electrode (28) extends through the first gas passageway (52) and Claim 2, characterized in that the gas passage protrudes downstream from the first gas passage (52). No. 9 spray coating equipment. 32. the ring (14) has a downstream shape with a wedge-shaped reduction in cross section; The spray coating apparatus according to any one of claims 29 to 31. , 33. The ring (14) has an aerodynamic wedge on the downstream side in axial section. The discharge direction of the second gas passage (56, 66) is the same as that of the gas flow. sweeps along the outer surface (60, 68) of said ring (14) without separating; 33. The spray coating apparatus of claim 32, wherein: 34. said second gas passageway (50) disappearing at a radially outer outer surface (60); , a third gas passageway (56) disappears on the radially inner-outer surface (68) of the ring (14). The spray coating apparatus according to any one of claims 29 to 33, characterized in that: 35. All electrodes (28) are ring-shaped electrical conductors (80) made of electrically insulating material Any of claims 29 to 34, characterized in that they are connected to each other by Reka's spray coating equipment. 36. At least two gas passageways (52, 78, 56, 66) have separate gas supplies. It is connected to the supply pipes (48, 49), and these air passages are connected to the gas supply pipes (48, 49). characterized in that the gas supplied to the can be adjusted and controlled separately and independently The spray coating apparatus according to any one of claims 29 to 35. 37. the ring (14) consists of at least two ring-shaped parts; The gas passages (52, 78, 56, 6 6) and an electrode (28) are arranged. Any spray coating equipment. 38. At least one of the first and further gas passages (52, 78, 56, 66) The ring-shaped hose (26/2, 28/2) has multiple outlet openings. , 30/2), or formed by a ring-shaped tube The spray coating apparatus according to any one of claims 29 to 37. 39. The hose (26/2, 28/2, 30/2) or tube is The spraying method according to claim 38, wherein each passage has a different inner diameter cross-sectional dimension. coating equipment.