CN101184555A - Spray gun for powder electrostatic coating - Google Patents
Spray gun for powder electrostatic coating Download PDFInfo
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- CN101184555A CN101184555A CNA2006800185105A CN200680018510A CN101184555A CN 101184555 A CN101184555 A CN 101184555A CN A2006800185105 A CNA2006800185105 A CN A2006800185105A CN 200680018510 A CN200680018510 A CN 200680018510A CN 101184555 A CN101184555 A CN 101184555A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—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
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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
- B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
- B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
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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
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
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- Electrostatic Spraying Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
A spray gun for powder electrostatic coating in which the pattern width can be regulated easily, a spray pattern having an appropriate spray speed and an appropriate spread is formed, a high charging effect is imparted to the particles by a charging electrode, and the coating efficiency is enhanced. Regulation air openings (31) for jetting compressed air toward a central spray flow are provided on both sides of a jet opening (22), and the pattern width can be regulated by regulating the flow rate of the compressed air. The jet opening (22) is provided with auxiliary air openings (23) for jetting compressed air along a powder spray flow arranged around a central opening (21) for jetting powder. The spray gun can be adapted to the shape and portion of the object to be coated under an optimal condition by imparting a straight drive force to the spray flow by the compressed air from the auxiliary air openings (23). Furthermore, a charging electrode (9) is arranged at the center of the jet opening (22), and the distal end of the electrode is located at or just before the colliding/scattering position of the jet air.
Description
Technical field
The present invention relates to spraying powder coating and utilizing electrostatic interaction to be coated in the spray gun of being used by the powder electrostatic coating on the spray, can cooperate the ejection condition to regulate spray pattern, can improve spray efficiency simultaneously.
Background technology
In many spraying processes, powder sprays with using solvent, application and compares by the spraying that drying forms the liquid coating of filming, owing to do not use solvent, not only save resource, but also can prevent the discharge of VOC, therefore favourable to environment, in addition, also have advantages such as coating strength is good.In addition, re-using the coating that is not coated on by on the spray owing to can reclaim, is a kind of utilization of resources aspect spraying method preferably therefore.
On the other hand, in various powder spraying methods, utilize the powder spraying of spray gun, as the versatility height, can use being widely used at wider range by the spraying method of spray.In addition, wish to adopt the coating efficiency of high voltage generation of static electricity, improve the coating efficiency of the coating of being sprayed, electrostatic spraying that can efficent use of resources, it is expected to popularize in vast scope as these effective spraying methods.
Because powder coating itself is by the coating on the spray, the spray gun of common powder spraying usefulness has and uses high voltage static and the powder of spraying is coated with attached to by the function on the spray, can be used as the formation of electrostatic gun.Therefore, powder coating is sent into spray gun utilizing compressed air to become under the situation of flow regime, after the nozzle spraying that is located at front end, charged in by the formed ionization circle of the discharge of charged electrode territory, utilize towards by the formed electric field of spray, effectively attached to by on the spray.
The supply of general powder coating is owing to be to utilize the ejector-type pump to send into more air, therefore above-mentioned nozzle suppresses flow velocity with bigger bore, in addition, and in nozzle the place ahead arrangement of baffles, the spraying flow velocity that inhibition is directly advanced, the coating effect that can not hinder static.
On the other hand, in order to carry out high efficiency spraying, must be according to by the shape adjustment spray flow of spray.Outside the main cause proposition of the speed of above-mentioned spray flow mainly as coating efficiency, form the main cause that is coated with face uniformly as the graphics shape of spraying, the size of corresponding spraying face effectively sprays very important.That is,, can obtain common thickness by on bigger area, spraying with uniform figure with big width, and good work, these all are known in the spray gun that the liquid coating with permanent history is used.
On the other hand, with being characterized as of powder spraying, not being coated on by the powder coating on the spray is recyclable and re-using, but the powder that re-uses unavoidably has sneaking into of impurity.In addition, in order to re-use, the equipment of recovery or its maintenance activity etc. need many expense and time, if consider cost, then the advantage of industry reduces.Therefore, adopt the raising of coating efficiency of new powder coating very important.Because directly relevant, therefore wish to improve above-mentioned problem with the operation raising that the shortening of spray time or spraying process causes.
As mentioned above, in the spray gun that existing powder is used, because the supply of powder coating is carried supply with compressed air, still utilize the jet power of carrying air to produce, above-mentioned baffle plate is representational concerning the dispersion of spraying, uses the different shape size because of its size or shape and configuration etc. are different.
In addition, have narrow gap or thin shape by the situation of spray under, need the figure of less width, the spraying face with flat big width by spray on need the figure of big width certainly.Proposed to make spray flow conflict in the past from two relative nozzle ejections, thereby the spy who obtains the width of figure opens the technology described in the clear 54-24953 communique, and as the nozzle that uses slit, and make the spy of the variable technology of figure open the method shown in the clear 62-163758 communique etc. etc.
But these technology all are that nozzle is changed, and are adjusted at atomize or the operability aspect is not fine as figure.In actual applications, need carry out some improves.
In addition, as can understanding in the above-mentioned prior art, powder spraying major part is prerequisite with the electrostatic spraying all, take charged electrode near or be built in the ejiction opening of powder, and make the charged structure of powder particle.But under the situation of powder electrostatic spray gun formerly, as mentioned above, owing to ejiction opening is provided with bigger aperture area in order to spray a large amount of conveying air that comprise powder, charged efficient is not talkative fine.
Summary of the invention
The objective of the invention is to, solution is in the spray gun of the powder spraying usefulness of utilizing static, graphic width was adjusted difficulty in the past, can not be widely with by the corresponding problem of the shape of spray, its objective is to provide and easily to carry out the adjustment of graphic width, and can make spraying become optimum atomize, the powder electrostatic coating spray gun that improves the spraying quality and boost productivity.
Particularly, and with by the initial spraying term harmonizations such as shape position of spray,, can more easily adjust, improve spraying quality and spray efficiency from the powder coating of powder spray gun ejection by optimum graphic width.
In addition, in powder electrostatic coating, the electrostatic efficiency of powder is big to the spray efficiency influence, must improve the charged coating efficiency that causes.At present, adopt configured electrodes in the spraying of opening, or in the method for the outer configured electrodes of spraying with broad, but owing to carry air, the density of powder is approached, flow velocity is fast, can not get good charged effect.Compare with general liquid spray, must be worth charged with higher voltage.
Therefore, the objective of the invention is, in the spray gun that powder electrostatic coating is used, the powder of ejection is coated on to be formed on the spray has the suitable spray velocity and the spray pattern of spray width, this ejection particle is produced the higher charged effect of charged electrode, thereby improve spray efficiency.
The powder that the present invention relates to mixing air is become flow regime is delivered to the ejiction opening that is located at the spray gun front end, from this ejiction opening by the spray gun of spray ejection powder spraying usefulness.By spraying compressed-air actuated adjustment air scoop towards the center spray flow in the setting of the both sides of ejiction opening, utilize compressed air that center spray flow conquassation is become flat, spray pattern is adjusted into the bigger shape of width; Compressed air require can be adjusted, to adjust the size of figure.
On the ejiction opening at center, powder nozzle center mouth opening is provided with on circumference along powder stream and is ejected to its compressed-air actuated secondary air ports on every side.Under the state that surrounds by air from the compression of secondary air ports ejection, the powder spray flow that comes out from the center air scoop from the ejiction opening ejection.Can change independently and lead to the adjustment of adjusting air scoop with the air quantity delivered with lead to the auxiliary air quantity delivered of secondary air ports.
In addition, as the best structure of type of service in the practicality, at powder ejiction opening center configuration high voltage charged electrode, the needle-like front end of this electrode is located at from conflict distributed locations or its front of the injection air of above-mentioned jet ejection, promptly in the scope of ejiction opening and above-mentioned distributed locations.
Like this, by connecting the high voltage that sends from the high-voltage generator that is placed on spray gun inside, can not damage the powder electrostatic coating of operability.
In addition, towards fore-end, spray compressed-air actuated rinse air mouth in the arranged outside of above-mentioned ejiction opening at the outstanding high voltage charged electrode in the place ahead of above-mentioned ejiction opening.The rinse air mouth also can double as sprays the jet of above-mentioned adjustment air.
Adopt powder spray gun of the present invention, under stable status always, nozzle ejection powder from the center, and ejection compressed air, feasible all from side, both sides conquassation spray flow with respect to this spray flow, like this, can make the spray pattern of common circle become flat, increase above-mentioned air supply more, then graphic width is big more.Therefore, if wide by the shape of spray, then by widening graphic width, can be coated with uniformly on all by spray, the ejection operation is few, can improve spray efficiency.
The air supply amount adjusting apparatus that the adjustment of above-mentioned graphic width can utilize spray gun to have is adjusted simply, can carry out the not adjustment of interruption operation.Can automatically control the air capacity adjusting device,, can automatically control figure based on external control signal by supplying with the air that utilizes outside adjustment valve to adjust.
In addition, in the present invention, by secondary air ports is set around the middle pit of the stomach of ejection powder, ejection compressed air can directly be advanced power with spray flow.Can adjust its flow independently with above-mentioned adjustment air from the compressed air that secondary air ports is come out, spray flow can be according to being obtained optimum spray flow easily by the state at the shape of spray or spraying position like this.
Particularly have with in the past inaccessiable gap of spray gun or narrow corner by spray under the situation about spraying, by increasing the compressed air that comes out from secondary air ports, increase potential energy for the spray flow that directly advances, can be more easily corresponding fast, to the operation ground that also can not damaged by spray of complicated shape carrying out the powder spraying.
In addition, adopt powder electrostatic spray gun of the present invention, from the powder coating of center ejiction opening ejection with state that delivery air mixes under, utilize the adjustment air dispersion of spraying from the side, form the suitably spray pattern of dispersion, be ejected in by on the spray.Be applied to the high-voltage discharge that is located at this distributed locations or disperses preceding charged electrode front end, the powder that the ionization circle territory that utilization forms around it disperses, when in the high zone of density, passing through height ionization circle territory, can be expeditiously to charged being sprayed by spray.
On charged effect, owing near the electrode front end, disperse, can in the scope of concentrating, carry out chargedly, again because distributed locations is set in from the electrode front end on the high density point of the electric field that is formed by spray, thereby can carry out efficiently.Like this, can improve by the coating efficiency of spray, what can be difficult in the past be coated with effect such as be coated with on by the side of spray, and the result can shorten spraying process, improves operation.
In addition, in the raising of coating efficiency, under the situation that does not re-use the residue powder that disperses, the raising of coating efficiency, even re-using under the situation, also can cut down and at this moment reclaim and the necessary cost of regenerating, can obtain all utilizations of resources of paint finishing and economic effect.
In addition, in the present invention, by continuing use, the ejection powder like this, hinders from electrode discharge attached on the charged electrode.Owing to utilize the jet cleaning air can prevent that charged efficient from reducing, can keep stable coating efficiency, continue powder electrostatic coating.
Description of drawings
In order further to understand the present invention, understand actual effect, can be with reference to the following drawings of the embodiment that represents effect of the present invention.
All cutaway views of the spray gun that Fig. 1 uses for powder electrostatic coating of the present invention;
Sprayer unit partly the cutaway view of Fig. 2 for amplifying presentation graphs 1;
Fig. 3 is for seeing the sprayer unit front view partly of Fig. 2 from front end (left side) direction;
Fig. 4 is for seeing the sprayer unit front view partly of another embodiment from front end (left side) direction;
Fig. 5 is the figure of the coating efficiency of the present invention relatively and previous powder electrostatic spray gun, and Fig. 5 (a) is illustrated in the coating efficiency on the flat board, and Fig. 5 (b) is illustrated in the coating efficiency on the pipe;
Fig. 6 is being for utilizing the present invention and previous powder electrostatic spray gun under spraying situation on the pipe, relatively around the figure of spraying (pay I and return り) situation.
The specific embodiment
Fig. 1 uses the figure of all sections of spray gun for the powder electrostatic coating of expression embodiments of the invention.At the front end of gun body 1 the powder nozzle 3 that constitutes sprayer unit is installed, is utilized the air cap 2 that cover 4 installations removably and these powder nozzle 3 concentric installations.From the powder introducing port 10 at the rear portion that is located at gun body 1 powder path, be connected with powder nozzle 3 through supplying with flexible pipes 8, being connected with carrier inlet 7 near front end.There is not expression in detail to adjust the air flue of spraying among the figure.As shown in Figure 2, adjust air and supply with the front opening of road 11, from above-mentioned powder nozzle 3 with cover between 4, be connected with the adjustment airport 32 of air cap 2 at gun body 1.Another auxiliary air is supplied with road 12 at air storage chamber 24 split sheds that formed by installation powder nozzle 3.
Under the situation of present embodiment, high-voltage generator 5 is housed in gun body 1.This high voltage output is connected with the charged electrode 9 at the center that is configured in above-mentioned powder nozzle 3 by high voltage terminal 6.
Utilize Fig. 2 that the details of sprayer unit is described.Powder nozzle 3 is made by insulative resin, in be formed centrally the nozzle inner gateway 20 of supplying with powder, the middle pit of the stomach 21 openings of its front end, and form the ejiction opening 22 that connects with bigger bore.Between the middle pit of the stomach 21 and ejiction opening 22, on circumference, form secondary air ports 23, pass through auxiliary air path 25 ejections of powder nozzle 3 from the air of above-mentioned air storage chamber 24.In this embodiment, on circumference, form 8 secondary air ports 23 (referring to Fig. 3).
The structure of air cap 2 is, by contact with powder nozzle 3, and paired tapering sheet, be installed as with one heart and rotatable.Make the ejiction opening front openings of above-mentioned powder nozzle 3, on the turning 33 relative, be provided with and spray compressed-air actuated adjustment air scoop 31 towards spray flow from above-mentioned powder nozzle 3 with its both sides, the place ahead.Can select to adjust the size of air scoop 31 according to the adjustment parameter of spraying, spray angle, number etc.In an embodiment, per two formation are a pair of respectively.
In addition, be supplied to the compressed air of secondary air ports 23 and adjustment air scoop 31, supply with road 11 supplies with the adjustment air for supplying with road 12 from above-mentioned auxiliary air respectively.The amount of these air does not illustrate among the figure, can adjust independently respectively by adjusting devices such as adjustment valve gears.
In addition, as shown in Figure 4, in another embodiment, be provided with two pairs in right angle orientation and adjust air scoop 31A, 31B only in relative side ejection, can carry out the switching of figure direction.Can be assembled into by the corresponding auto spraying control device of spray, be convenient to use in the spraying automatically at spray robot etc.
As the spray gun that carries out powder electrostatic coating, same with the spray gun structure that other electrostatic sprayings are used, begin all to form from gun body by the insulator resin, be provided with charged electrode at front end.Under the situation of present embodiment, the electrode tip 91 that is located on the rear end of the charged electrode 9 that is installed in gun body 1 is connected with the high voltage outlet side of high-voltage generator 5 in being contained in gun body 1, electrically connect with the high voltage terminal 6 that extends, make front end give prominence to the position of number mm at the ejiction opening center.
The powder coating of ejection utilizes supply pump, is becoming under the mobile state with compressed air, sends into the powder introducing port 10 of powder spray gun.Under the situation of present embodiment, supply pump adopts the pump of being sent liquidation powder mode by air, and using air capacity when being delivered to powder spray gun is a spot of pump of 1/10 of previous ejector-type pump.
As using the preferred embodiments of the present invention effectively, use the volume shape pump that utilizes oil cylinder and piston.Example as this pump, use such pump: utilize the mobile pressurization decompression of carrying out repeatedly of pistons reciprocating in cylindric oil cylinder, thereby powder is sucked in the oil cylinder, export with sending into in-oil cylinder a spot of air in order to realize liquidation, by supplying with flexible pipe, supply to powder spray gun.Spray the quantity delivered 50～300g/ branch of the fine scope of using as powder as powder.
Utilize the supply pump of embodiment, in order to carry the supply powder, air capacity stable supplying that can 8～10 liters/minute.Cut down significantly for essential 60～100 liters/minute with respect to the ejector-type pump.In order under low speed, stably to carry, even the powder ejiction opening of spray gun 22 previous minimums also must mm more than ten, can be littler than it, the ejiction opening of best 5～7mm does not stop up, even Pen Chu speed maximum also is previous 1/2 therefrom, average out to about 1/4.
From the powder of center ejiction opening 22 ejections, under all states of the adjustment air conquassation that utilization is sprayed from the adjustment air scoop 31 in two sides, disperse, enlarge flatly.Its width is that compressed-air actuated flow is wide more more at most, can be according to being selected by the spraying width of spray.The amount of the adjustment air of adjustment spray pattern is by the spray volume decision of powder.In an example, for the output quantity that 200g/ divides, air capacity is 50 liters/minute, is leaving on the 200mm position, can obtain the above graphic width of about 300mm.
On the other hand, when surpassing certain limit by the graphic width of adjusting air expansion, blow under the state that flies at the center, the density of powder reduces, and becomes the result of uneven coating.In the present invention, secondary air ports 23 from be located at around the pit of the stomach 21, the compressed air that sprays abreast with spray flow does not make the back pressure in the powder nozzle increase, wrapping under the state of spray flow, strengthen spray flow forwards, promptly add the tetanic power of advancing, can prevent that the density of above-mentioned centre of figure from reducing, keep average Density Distribution state.
In addition, under spraying sprays by the situation of spray internal corners, except the edge effect that static causes, when not having potential energy in spray flow, form the situation that does not enter, it is even to produce crawling.By increasing above-mentioned same auxiliary air, increase and directly advance power, can make spray amount concentrate on centre of figure, can select the spraying under the good state of situation, improve the problems referred to above.
Form the above-mentioned ejiction opening 22 of atomize, adjust air scoop 31, the structure of secondary air ports 23 or balance are because of powder spray condition difference has various, its each size or size must be selected spray condition according to the proterties or the various spraying condition of powder coating without limits.Because like this, can distinguish the flow of individually adjusting above-mentioned adjustment air and auxiliary air, the operator can directly or according to the condition of setting automatically control, and more can increase result of use.
In addition, in order to obtain electrostatic efficiency, charged electrode 9 when having high voltage, towards to utmost point discharge, forms highly Ionized circle territory at the electrode front end between position and ejiction opening that above-mentioned adjustment air conflicts with spray flow.Powder particle by this ionization circle territory is charged, when near as to the utmost point by spray the time, utilize the electrostatic efficiency sorption on by spray.
The powder that above-mentioned adjustment air makes conflict disperse successively carries out charged, makes ionization circle territory utilize the spray flow of injection forwards to flow.Therefore, can form the ionization territory of charged electrode, the position of loosing with powder is overlapped.With the spraying outside that is located in the past to be disperseed, by the situation in the decentralized spray flow of a large amount of air mass flows relatively, become the result who obtains high electrostatic efficiency.
The front end of charged electrode 9 of the present invention is in the place ahead of ejiction opening 22, is positioned to form the zone that adjustment air that above-mentioned figure uses sprays.Therefore, the electrode that adheres to easily for powder coating, but often compressed air is injected, therefore can prevent ADHESION OF PAINTS.Like this, with the situation in spray flow simply or be arranged near situation about departing from the spraying center relatively, owing to often have normal air blowing, the hope effect of charged electrode 9 can be brought into play often stable performance.With spraying differently, be purpose with cleaning attached to the coating of electrode front end, be provided with in addition then that to spray compressed-air actuated rinse air mouth also passable.
Fig. 5 is an example of the coating efficiency of the actual spraying of expression, the comparison of the coating efficiency when expression is carried out with respect to dull and stereotyped and pipe.Under any circumstance, at the spraying spray gun that uses from existing spray nozzle opening shape, from carrying the situation (A) of the few feedway ejection powder of air capacity; With the use eductor pump, in the comparison of ejection by the situation (B) of the powder of a large amount of conveying air supplies, situation of the present invention (C) shows high efficient.
Fig. 6 sprays under the situation of pipe the figure of the coating situation of the front of spraying, the back side and side with diagrammatic representation in addition.Adopt the present invention, on the side that is difficult to be coated with, can see uniform coating, can obtain all coating efficiencies and improve and the coating thickness effect of uniform.
Claims (6)
1. spray gun that powder electrostatic coating is used, its with mixing air and the powder conveying that forms flow regime to the ejiction opening that is located at the spray gun front end, and on by spray, spray powder, it is characterized in that, towards spray flow from above-mentioned ejiction opening, with the both sides of above-mentioned ejiction opening the compressed-air actuated adjustment air scoop of injection is set relatively, above-mentioned compressed air is supplied with to above-mentioned adjustment air scoop by flow adjuster.
2. the spray gun that powder electrostatic coating as claimed in claim 1 is used, it is characterized in that, above-mentioned ejiction opening is built-in with the middle pit of the stomach of the powder nozzle center of the front end that is located at spray gun, and in the outside at the middle pit of the stomach with circle-shaped setting, making can be along the secondary air ports from the powder stream ejection of this center ejection.
3. the spray gun that powder electrostatic coating as claimed in claim 2 is used is characterized in that, can change the adjustment that passes to above-mentioned adjustment air scoop respectively independently with the air quantity delivered with pass to the auxiliary air quantity delivered of above-mentioned secondary air ports.
4. the spray gun that powder electrostatic coating as claimed in claim 1 is used is characterized in that, at the center configuration high voltage charged electrode of above-mentioned ejiction opening, connects the high voltage that produces from the high-voltage generator that is built in the spray gun, makes spray flow charged.
5. the spray gun of using as claim 1 or 4 described powder electrostatic coatings, it is characterized in that above-mentioned high voltage charged electrode is arranged on front end come with needle-like in the scope of the conflict distributed locations of injection air of self-adjusting air scoop or powder ejiction opening and above-mentioned distributed locations.
6. the spray gun of using as claim 1 or 4 described powder electrostatic coatings is characterized in that, has in the arranged outside of above-mentioned ejiction opening, sprays compressed-air actuated rinse air mouth towards the fore-end at the outstanding high voltage charged electrode in the place ahead of above-mentioned ejiction opening.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP152220/2005 | 2005-05-25 | ||
| JP2005152220A JP5010111B2 (en) | 2005-05-25 | 2005-05-25 | Spray gun for powder coating |
| JP063683/2006 | 2006-03-09 | ||
| JP2006063683A JP2007237089A (en) | 2006-03-09 | 2006-03-09 | Spray gun for powder electrostatic coating |
| PCT/JP2006/310826 WO2006126716A1 (en) | 2005-05-25 | 2006-05-24 | Spray gun for powder electrostatic coating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101184555A true CN101184555A (en) | 2008-05-21 |
| CN101184555B CN101184555B (en) | 2011-12-28 |
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ID=37452129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800185105A Expired - Fee Related CN101184555B (en) | 2005-05-25 | 2006-05-24 | Spray gun for powder electrostatic coating |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR101311200B1 (en) |
| CN (1) | CN101184555B (en) |
| WO (1) | WO2006126716A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110743720A (en) * | 2014-09-04 | 2020-02-04 | 胜利创新公司 | Electrostatic sprayer device |
| CN114751657A (en) * | 2022-05-26 | 2022-07-15 | 武汉市汉泓福玻璃有限公司 | Coated toughened glass and production process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5787223B2 (en) * | 2011-09-20 | 2015-09-30 | いすゞ自動車株式会社 | Electrostatic coating method and electrostatic coating gun |
| KR101107671B1 (en) * | 2011-10-18 | 2012-01-25 | 한국종합철관 (주) | Coating device for two-pack polyurethane |
| JP6267538B2 (en) * | 2014-02-21 | 2018-01-24 | アネスト岩田株式会社 | Spray gun |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1199342A (en) * | 1997-09-29 | 1999-04-13 | Tohoku Kiko Kk | Coating machine with ion generator |
| JPH11179246A (en) * | 1997-12-18 | 1999-07-06 | Honda Motor Co Ltd | Gun for electrostatic powder coating |
| JP3909426B2 (en) * | 1998-05-08 | 2007-04-25 | 旭サナック株式会社 | Electrostatic coating machine using hand gun |
| DE19838280A1 (en) * | 1998-08-22 | 2000-02-24 | Itw Gema Ag | Spray pistol for coating objects with powder coating material has coating material line passing through one-piece handle and barrel to atomizer at downstream end of barrel, prevents leakage and has minimal maintenance |
| US6478242B1 (en) * | 1999-09-16 | 2002-11-12 | Nordson Corporation | Powder spray gun |
| CN1165381C (en) * | 1999-09-16 | 2004-09-08 | 诺德森公司 | Powder spray gun |
| US6977013B2 (en) * | 1999-09-17 | 2005-12-20 | Nordson Corporation | Powder coating system central controller |
| JP2001205143A (en) * | 2000-01-26 | 2001-07-31 | Ransburg Ind Kk | Electrostatic coating machine used as two type and method |
-
2006
- 2006-05-24 KR KR1020077027332A patent/KR101311200B1/en not_active IP Right Cessation
- 2006-05-24 WO PCT/JP2006/310826 patent/WO2006126716A1/en active Application Filing
- 2006-05-24 CN CN2006800185105A patent/CN101184555B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110743720A (en) * | 2014-09-04 | 2020-02-04 | 胜利创新公司 | Electrostatic sprayer device |
| CN110743720B (en) * | 2014-09-04 | 2022-04-29 | 胜利创新公司 | Electrostatic sprayer device |
| US11623231B2 (en) | 2014-09-04 | 2023-04-11 | Octet Medical, Inc. | Electrostatic fluid delivery system |
| CN114751657A (en) * | 2022-05-26 | 2022-07-15 | 武汉市汉泓福玻璃有限公司 | Coated toughened glass and production process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101184555B (en) | 2011-12-28 |
| WO2006126716A1 (en) | 2006-11-30 |
| KR20080009299A (en) | 2008-01-28 |
| KR101311200B1 (en) | 2013-09-26 |
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Granted publication date: 20111228 Termination date: 20170524 |