CN104162492B - Electrostatic powder spraying device and its spraying method - Google Patents
Electrostatic powder spraying device and its spraying method Download PDFInfo
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- CN104162492B CN104162492B CN201410373703.9A CN201410373703A CN104162492B CN 104162492 B CN104162492 B CN 104162492B CN 201410373703 A CN201410373703 A CN 201410373703A CN 104162492 B CN104162492 B CN 104162492B
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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
-
- 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
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- Electrostatic Spraying Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The present invention provides a kind of electrostatic powder spraying device and its spraying methods.The electrostatic powder spraying device includes jet-stream wind producing element, electric field producing element and shapes electric field element, wherein jet-stream wind producing element is for generating the jet-stream wind for carrying charged powder particles, electric field producing element is used to generate the electrostatic field of force for guiding charged powder particles between electric field producing element and element to be sprayed, shapes electric field element is used to carry out shaping to the electrostatic field of force, to reduce faraday cup electrostatic screening effect of the electrostatic force around the sunk area of element to be sprayed.By the above-mentioned means, the present invention is able to solve the not upper powder problem that element to be sprayed is generated in sunk area by faraday cup electrostatic screening effect, the upper powder depth in sunk area is improved.
Description
Technical field
It dusts technical field the present invention relates to high-pressure electrostatic, in particular to a kind of electrostatic powder spraying device and its spray
Coating method.
Background technique
Fig. 1 is the operation schematic diagram of the high-pressure electrostatic podwer gun of the prior art.Refering to Figure 1, high-pressure electrostatic dusts
Rifle 10 applies high-voltage electricity to discharge, when the dusty spray warp mixed with high-pressure injection air-flow when dusting work, to lance head 11
Negative electrical charge on induction band when crossing lance head 11, to form charged powder particles and fly to element 13 to be sprayed, member to be sprayed at this time
The ground connection of part 13 forms anode, so that the electrostatic field of force is generated between lance head 11 and element to be sprayed 13, in the effect of electrostatic force
Lower charged powder particles are adsorbed in the surface of element 13 to be sprayed, then by heating so that charged powder particles melting and solidification or
It is plasticized into coating.
However, the high pressure of the prior art is quiet when there are the sunk areas 131 such as deep recessed or groove on the surface of element 13 to be sprayed
Electric podwer gun 10 can not overcome faraday cup of the electrostatic force around sunk area 131 when spraying to sunk area 131
Electrostatic screening effect, the i.e. power line in the electrostatic field of force cannot be introduced into the inside of sunk area 131, cause charged powder particles can not
It is directed to the inside of sunk area 131 by electrostatic force, to reduce the upper powder depth in sunk area 131, or even is not generated
The problem of powder.
Summary of the invention
In view of this, the embodiment of the present invention the technical problem to be solved is that provide a kind of electrostatic powder spraying device and its
Spraying method is able to solve the not upper powder problem that element to be sprayed is generated in sunk area by faraday cup electrostatic screening effect,
Improve the upper powder depth in sunk area.
In order to solve the above technical problems, one technical scheme adopted by the invention is that：A kind of Electrostatic Spraying of powder Coatings coating is provided
It sets, including：Jet-stream wind producing element, for generating the jet-stream wind for carrying charged powder particles；Electric field producing element is used
In generating the electrostatic field of force for guiding charged powder particles between electric field producing element and element to be sprayed；Shapes electric field member
Part, it is quiet to reduce faraday cup of the electrostatic force around the sunk area of element to be sprayed for carrying out shaping to the electrostatic field of force
Electrical shielding effect.
Wherein, shapes electric field element is the insulation external member for being set in the periphery of electric field producing element.
Wherein, on at least dimension of the axis of movement perpendicular to jet-stream wind, after shapes electric field component shaping
The field distribution region in the electrostatic field of force is less than the field distribution region in the electrostatic field of force without shapes electric field component shaping.
Wherein, insulation external member is less than size of the sunk area in corresponding dimension in the size at least one dimension.
Wherein, insulation external member is arranged in a tubular form.
Wherein, jet-stream wind producing element further comprises the discharge electrode needle for being used to form charged powder particles, wherein putting
Electrode needle is set to the inside of insulation external member.
Wherein, the free end for the external member that insulate is arranged to stretch to the inside of the sunk area of element to be sprayed, in turn
Jet-stream wind is directed to the inside of sunk area.
Wherein, electrostatic powder spraying device further comprises diversion member, and diversion member is for directed spray air-flow around fortune
Helically formula moves shaft line.
In order to solve the above technical problems, another technical solution used in the present invention is：A kind of electrostatic powder coating is provided
Method, including：The electrostatic field of force is generated between electric field producing element and element to be sprayed；Using shapes electric field element to electrostatic force
Field carries out shaping；The charged powder particles in jet-stream wind are directed to the recessed of element to be sprayed using the electrostatic field of force after shaping
Fall into region, wherein the method that the electrostatic field of force after shapes electric field component shaping generates around the sunk area of element to be sprayed
Cage electrostatic screening effect is drawn to be less than the electrostatic field of force without shapes electric field component shaping in the sunk area week of element to be sprayed
Enclose the faraday cup electrostatic screening effect of generation.
Wherein, include to the step of electrostatic field of force progress shaping using shapes electric field element：It is generated using electric field is set in
The insulation external member of the periphery of element carries out shaping to the electrostatic field of force.
Wherein, the step of shaping being carried out to the electrostatic field of force using the insulation external member for the periphery for being set in electric field producing element packet
It includes：On at least dimension of the axis of movement perpendicular to jet-stream wind, the electrostatic field of force after shapes electric field component shaping
Field distribution region is less than the field distribution region in the electrostatic field of force without shapes electric field component shaping.
Wherein, insulation external member is less than size of the sunk area in corresponding dimension in the size at least one dimension.
Wherein, insulation external member is arranged in a tubular form.
Wherein, the charged powder particles in jet-stream wind are directed to element to be sprayed using the electrostatic field of force after shaping
Further comprise before the step of sunk area：Charged powder grain is formed using the discharge electrode needle being set to inside insulation external member
Son.
Wherein, the charged powder particles in jet-stream wind are directed to element to be sprayed using the electrostatic field of force after shaping
The step of sunk area includes：Jet-stream wind is directed to the inside of sunk area using insulation external member.
Wherein, the charged powder particles in jet-stream wind are directed to element to be sprayed using the electrostatic field of force after shaping
The step of sunk area includes：Using diversion member, for directed spray air-flow, along axis of movement, helically formula is moved.
Through the above technical solutions, the beneficial effect that the embodiment of the present invention generates is：Design electrostatic powder spraying device packet
Shapes electric field element is included, shaping is carried out to the electrostatic field of force that electric field producing element generates by shapes electric field element, is not only made
Dusty spray can be charged to guarantee enough directed forces, and can be reduced between shapes electric field element and element to be sprayed
The electrostatic field of force solves to reduce faraday cup electrostatic screening effect of the electrostatic force around the sunk area of element to be sprayed
Because of the not upper powder problem that faraday cup electrostatic screening effect generates around sunk area, element to be sprayed is improved in sunk area
Upper powder depth.
Detailed description of the invention
Fig. 1 is the operation schematic diagram of the high-pressure electrostatic podwer gun of the prior art；
Fig. 2 is the structural schematic diagram of the electrostatic powder spraying device of the preferred embodiment of the present invention；
Fig. 3 is the schematic cross-section of diversion member in electrostatic powder spraying device shown in Fig. 2；
Fig. 4 is the preferred implementation for being formed by curing coating on element to be sprayed using electrostatic powder spraying device of the invention
The schematic diagram of example；
Fig. 5 is along element to be sprayed shown in Fig. 4 along the cross-sectional view in the direction A-A；
Fig. 6 is along element to be sprayed shown in Fig. 4 along the cross-sectional view in the direction B-B；
Fig. 7 is along element to be sprayed shown in Fig. 4 along the cross-sectional view in the direction C-C；
Fig. 8 is along element to be sprayed shown in Fig. 4 along the cross-sectional view in the direction D-D；
Fig. 9-10 is the enlarged diagram of the coating using the high-pressure electrostatic podwer gun of the prior art at position 4；
Figure 11-12 is that the amplification for the coating being formed by curing at position 5 using the high-pressure electrostatic podwer gun of the prior art is shown
It is intended to；
Figure 13-14 is that the amplification for the coating being formed by curing at position 14 using the high-pressure electrostatic podwer gun of the prior art is shown
It is intended to；
Figure 15 is the flow diagram of the Electrostatic Spraying of powder Coatings coating method of the preferred embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that embodiments described below of the present invention is only a part of the embodiments of the present invention, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The all other embodiment obtained, shall fall within the protection scope of the present invention.
It please recombine shown in Fig. 1, faraday cup electrostatic sheild during high-pressure electrostatic dusts, around sunk area
The production principle for covering effect is specific as follows：
Since electronegative free ion can be generated when lance head electric discharge, so that existing between lance head and element to be sprayed
A cloud cluster being made of charged powder particles and electronegative free ion, certainly will be produced between the cloud cluster and element to be sprayed
Raw certain electric field, normally referred to as space charge field.Therefore, close to the surface of element to be sprayed electric field be substantially by
Lance head applies the electric field generated when high-pressure electrostatic and space charge field is formed.What the two electric fields and jet-stream wind provided
Aerodynamic force guides charged powder particles jointly and deposits to the surface of element to be sprayed, powder in realization.
When there are the sunk areas such as deep recessed or groove on the surface of element to be sprayed, the power line in the electrostatic field of force can focus on tool
In place of having minimum electric field resistance, i.e., around sunk area (edge), leads to power line not and can enter the inside of sunk area.
It on the one hand, is the direction of electrostatic force by the effect of electrostatic force and the direction of power line due to charged powder particles,
Therefore power line lacks without it can enter the inside of sunk area and charged powder particles is caused to enter the inside of sunk area also
One important motive force.
On the other hand, the increase of edge field strength causes so that charged powder particles are more adsorbed in the edge
The deposition thickness of the edge charged powder particles of sunk area obviously increases, and inevitably generates two negative effects.
First, since charged powder particles are directed to by electrostatic force the edge of sunk area, consequently only that seldom charged powder particles
Into the inside of sunk area.Second, since the free ion that electric discharge generates when lance head applies high-pressure electrostatic can be along power line
It is deposited on the edge of sunk area, so that the charged powder particles deposited before are saturated by extra charge rapidly, is caused
Reverse ionization is very rapidly and strong.
Since charged powder particles are to be directed to element to be sprayed jointly by the aerodynamic force of jet-stream wind and electrostatic force
Surface, and higher aerodynamic force easily makes charged powder particles be not easy to deposit by the surface rebound of element to be sprayed, because
It must have sufficiently strong electric field when this spraying and electric field force be provided.However, the faraday cup electrostatic screen around sunk area is imitated
It should make the electric field that either lance head electric discharge generates or the space charge field that charged powder particles and free ion are formed
Not can enter the inside of sunk area, thus can help charged powder particles enter sunk area inside unique power-assisted
Exactly -- it is produced in the charged powder particles that the inside of sunk area is transmitted by jet-stream wind with " cloud cluster " that free ion is formed
Raw electric field.
Based on above-mentioned, it is known that it is not to solve that the configuration and power line in the electrostatic field of force are concentrated in the edge of sunk area
Sunk area can not go up unique problem of powder, because if working as edge by carrying out spraying prolonged enough to sunk area
When place deposits certain thickness charged powder particles, other charged powder particles just cannot be deposited in the edge again, uniquely
Place to go can only be just inside into sunk area.However, due to the reason of reverse ion, if the depth of sunk area
Larger or width is smaller, and the reverse ionization that edge rapidly develops will generate positively charged ion, and try hard to across recessed
The marginal deposit for falling into region will reduce carried charge by these ions to internal charged powder particles, cause to be pushed away by jet-stream wind
It moves the charged powder particles of the inside of sunk area and free ion is formed by electric field caused by " cloud cluster " and can not generate
Sufficiently strong electrostatic force overcomes air turbulence and deposits charged powder particles.
Even if carrying out second of spraying after being heating and curing for the first time again using secondary spraying, depressed area can not be solved
Domain can not go up powder problem because what faraday cup electrostatic screening effect generated because electric discharge generate free ion lance head with to
There are quick movement, and the movement velocity of its movement velocity and significantly larger than charged powder particles between spray element, when
Free ion can rapidly increase the charge in cured coating when moving to the surface of element to be sprayed, the reason is that solidification
Coating than uncured coating have bigger dielectric constant, that is, have better insulating properties.Therefore, by free ion take to
The charge on spray element surface can not leak into earth-return circuit, so that free ion rapidly increases the charge on coating,
To further result in back-ionization, so that powder utilization acutely declines.When practical application, the depth-to-width ratio of sunk area is more than 5:
1 just cannot make its uniformly upper powder.
According to above-mentioned principle it is found that needing to solve the problems, such as three to enable powder on sunk area：First, when spraying, keeps away
The surface for exempting from lance head and element to be sprayed generates the powerful electrostatic field of force, is avoided with this quiet in sunk area generation faraday cup
Electrical shielding effect；Second, it is required that dusty spray can take high-pressure electrostatic, if dusty spray does not take high pressure negative electricity
Lotus, which will be affected by gravity, can fall without depositing；Third, it is semiclosed that sunk area is that an air all hardly enters
Chamber, how dusty spray is effectively directed to the inside of sunk area.
Accordingly, the main object of the present invention is to provide a kind of electrostatic powder spraying device and the electrostatic powder based on the device
Last spraying method, to solve the problems, such as above three.
Fig. 2 is the structural schematic diagram of the electrostatic powder spraying device of one embodiment of the invention.It please refers to shown in Fig. 2, electrostatic
Powder spraying device 20 may include jet-stream wind producing element 21, electric field producing element 22, shapes electric field element 23 and master
Body structure 25.Wherein：
Jet-stream wind producing element 21 is set in 25 inner cavity of main structure, and electric field producing element 22 is set to main structure
25 close to the side of element 30 to be sprayed, and shapes electric field element 23 is set in the periphery of electric field producing element 22 and and main structure
25 are detachably connected.The preferred shapes electric field element 23 of the present embodiment is the insulation external member being arranged in a tubular form, and preferably insulation external member is adopted
It is exhausted with high impedances such as such as PTFE (Polytetrafluoroethylene, Teflon, polytetrafluoroethylene (PTFE) or Teflon), ceramics
Edge material is made.
Jet-stream wind producing element 21 may include discharge electrode needle 211, and the discharge electrode needle 211 of jet-stream wind producing element 21 is set
It is placed in the inside of the insulation external member, is used to form charged powder particles.
It is main when electrostatic powder spraying device 20 dust to the element to be sprayed 30 transmitted work on conveying 40
The ground connection of body structure 25 and holding part are connected high-pressure electrostatic, importing dusty spray and compressed air, electric field producing element 22 and can be used
In connection high-pressure electrostatic, and the electrostatic field of force is generated between electric field producing element 22 and element to be sprayed 30.
Jet-stream wind producing element 21 can be used for spraying dusty spray and compressed air, and dusty spray is through quiet when ejection
Negative electrical charge forms charged powder particles on field of electric force band, is mixed in compressed air and forms jet-stream wind and by jet-stream wind life
It is sprayed at element 21.
Shapes electric field element 23 can be used for carrying out the electrostatic field of force between electric field producing element 22 and element to be sprayed 30
Shaping, to reduce faraday cup electrostatic screening effect of the electrostatic force around the sunk area 31 of element to be sprayed, so that electrostatic
The field of force, which can guide charged powder particles, makes it be deposited on the sunk area 31 of element 30 to be sprayed.Specifically, perpendicular to
On the dimension of the axis of movement A of jet-stream wind, the field distribution region in the electrostatic field of force after 23 shaping of shapes electric field element
Less than the field distribution region in the electrostatic field of force without 23 shaping of shapes electric field element.
In the present embodiment, preferably the axis of movement A of jet-stream wind and discharge electrode needle 211 are on the same line, preferably
Dimension is the Y-axis in space three-dimensional rectangular coordinate system.Certainly in other embodiments, according to insulation external member setting shape,
Can on multiple dimensions perpendicular to the axis of movement A of jet-stream wind, the electrostatic field of force after 23 shaping of shapes electric field element
Field distribution region is less than the field distribution region in the electrostatic field of force without 23 shaping of shapes electric field element, and plurality of dimension is also
It may include X-axis, Y-axis and the Z axis in space three-dimensional rectangular coordinate system.
Further, size of the insulation external member at least one dimension is less than sunk area 31 in corresponding dimension (Y
Axis) on size, such as insulation external member width be less than sunk area 31 width.Also, free end (the direction for the external member that insulate
One end of sunk area 31) it is arranged to stretch to the inside of the sunk area 31 of element 30 to be sprayed, so as to spray
Conductance of emanating leads to the inside of sunk area 31.
The present embodiment can be according to element 30 to be sprayed and the contour structures of sunk area 31, by the free end for the external member that insulate
The various shapes such as the sharp mouth that can directly put in the inside of sunk area 31, flat mouth are processed into, the purpose is to can will charge powder
Last particle is delivered directly to the inside of sunk area 31 to complete even application, so that above-mentioned third is solved the problems, such as, even if recessed
Falling into region 31 is semi-enclosed chamber that an air all hardly enters, also can be effective by dusty spray (charged powder particles)
The inside for being directed to sunk area 31.
Based on above-mentioned, it is known that the present embodiment is according to Electrostatic Spraying of powder Coatings coating due to shapes electric field element 23 (insulation external member)
It sets 20 and is contoured to an isolation housing, be isolated between electric field producing element 22 and element to be sprayed 30 using its insulation characterisitic
The powerful electrostatic field of force generated, so as to avoid around depressed area 31 (edge) from generating faraday cup electrostatic screen
Effect.
Also, due to by electric field producing element 22 and its discharge electrode needle 211 be set to insulation external member inside, be equivalent to by
Outer electric discharge is changed to internal discharge mode, not only can solve above-mentioned Second Problem and has made high-pressure electrostatic on dusty spray band, but also can be with
Above-mentioned first problem is solved, that is, avoids generating between electric field producing element 22 and element to be sprayed 30 due to discharge electrode needle 211
It improves and exists so as to which dusty spray to be effectively directed to the inside of sunk area 31 in the high-pressure electrostatic field of force that electric discharge generates
The upper powder depth of sunk area 31, in practical application, electrostatic powder spraying device 20 can reach 10 to depth-to-width ratio:1 or more
Sunk area 31 carry out uniformly going up powder.
Referring to shown in Fig. 3, electrostatic powder spraying device 20 can further include diversion member 24, Ke Yiyong
In reduction jet-stream wind flow velocity.Also, it is preferred that diversion member 24 is set to the inner wall of the first area D1 of insulation external member, certainly
It can be set in the second area D2 of insulation external member, wherein the diameter of first area D1 is less than the diameter of second area D2.
For example, the preferred diversion member 24 of the present embodiment is sped structure and is integrally formed with insulation external member, spiral
For directed spray air-flow, around axis of movement, helically formula moves the diversion member 24 of formula, slows down the flow velocity of jet-stream wind with this,
Charged powder particles are reduced in the rebound of the inside of sunk area 31, the bottom of sunk area 31 is not limited only to and is held on bottom
Side wall promote the powder utilization of sunk area 31 to increase charged powder particles in the deposition of the inside of sunk area 31.
It should be noted that each structure can carry out other settings in electrostatic powder spraying device 20 shown in Fig. 2, such as
The first area D1 of insulation external member can be only arranged as that two plate bodys or interface up and down are triangular in shape, and diversion member 24 can be with
Other structures are set, sped structure shown in Fig. 3 is not limited in, as long as the flow velocity of jet-stream wind can be slowed down, reduce band
Rebound of the electro-powder particle in the inside of sunk area 31.
It is that " radiation tooth " as shown in Figure 4 is with element 30 to be sprayed below with reference to practical application scene shown in Fig. 4
Example, and carried out using the electrostatic powder spraying device 20 of the present embodiment and high-pressure electrostatic podwer gun 10 in the prior art respectively
About 3.5 minutes spray coating operations, after powder curing, the painting of 1~position of measurement position 17 by way of film thickness gauge and slice
Thickness degree, the data in the following table 1 are the coating layer thickness number obtained using electrostatic powder spraying device 20 provided by the present embodiment
According to the data in the following table 2 are the coating thickness data obtained using electrostatic powder spraying device 10 in the prior art, 1 He of table
Numerical value unit in table 2 is micron.
| Position | 1 | 2 | 3 | 4 | 5 |
| Coating layer thickness | 172~177 | 116~126 | 170~189 | 187~225 | 93~165 |
| Position | 6 | 7 | 8 | 9 | 10 |
| Coating layer thickness | 104~118 | 108~127 | 129~148 | 104~131 | 154~201 |
| Position | 11 | 12 | 13 | 14 | 15 |
| Coating layer thickness | 89~95 | 159~170 | 248~253 | 206~262 | 154~208 |
| Position | 16 | 17 | |||
| Coating layer thickness | 243~272 | 81~85 |
Table 1
| Position | 1 | 2 | 3 | 4 | 5 |
| Coating layer thickness | 129~157 | 90~114 | 161~185 | 0~36 | 8~65 |
| Position | 6 | 7 | 8 | 9 | 10 |
| Coating layer thickness | 18~52 | 80~92 | 84~106 | 119~122 | 113~117 |
| Position | 11 | 12 | 13 | 14 | 15 |
| Coating layer thickness | 76~93 | 88~105 | 200~217 | 16~58 | 110~150 |
| Position | 16 | 17 | |||
| Coating layer thickness | 109~130 | 133~152 |
Table 2
As shown in figure 5, at the first section along line A-A of element 30 to be sprayed, reference table 1, using the present embodiment provides
Electrostatic powder spraying device 20 dusted after the coating layer thickness that is formed by curing at position 1 be 172~177 microns, position
Setting the coating layer thickness being formed by curing at 2 is 116~126 microns, and the coating layer thickness being formed by curing at position 3 is 170~189 micro-
Meter, the coating layer thickness being formed by curing at position 4 is 187~225 microns.Reference table 2 is dusted using the high-pressure electrostatic of the prior art
When rifle 10, the coating layer thickness being formed by curing at position 1 is 129~157 microns, and the coating layer thickness being formed by curing at position 2 is
90~114 microns, the coating layer thickness being formed by curing at position 3 is 161~185 microns, the coating layer thickness being formed by curing at position 4
It is 0~36 micron.
As shown in fig. 6, at the second section along line B-B of element 30 to be sprayed, reference table 1, using the present embodiment provides
Electrostatic powder spraying device 20 dusted after the coating layer thickness that is formed by curing at position 5 be 93~165 microns, position
The coating layer thickness being formed by curing at 6 is 104~118 microns, and the coating layer thickness being formed by curing at position 7 is 108~127 microns,
The coating layer thickness being formed by curing at position 8 is 129~148 microns.Reference table 2, using the high-pressure electrostatic podwer gun of the prior art
It is 8~65 microns in the coating layer thickness that position 5 is formed by curing place, the coating layer thickness being formed by curing at position 6 is 18~52 when 10
Micron, the coating layer thickness being formed by curing at position 7 is 80~92 microns, and the coating layer thickness being formed by curing at position 8 is 84~106
Micron.
As shown in fig. 7, at the third section along line C-C of element 30 to be sprayed, reference table 1, using the present embodiment provides
Electrostatic powder spraying device 20 dusted after the coating layer thickness that is formed by curing at position 9 be 104~131 microns, position
Setting the coating layer thickness being formed by curing at 10 is 154~201 microns, and the coating layer thickness being formed by curing at position 11 is 89~95 micro-
Meter, the coating layer thickness being formed by curing at position 12 is 159~170 microns.Reference table 2 is sprayed using the high-pressure electrostatic of the prior art
When powder rifle 10, the coating layer thickness being formed by curing at position 9 is 119~122 microns, the coating layer thickness being formed by curing at position 10
It is 113~117 microns, the coating layer thickness being formed by curing at position 11 is 76~93 microns, the coating being formed by curing at position 12
With a thickness of 88~105 microns.
As shown in figure 8, at the 4th section along line D-D of element 30 to be sprayed, reference table 1, using the present embodiment provides
Electrostatic powder spraying device 20 dusted after the coating layer thickness that is formed by curing at position 13 be 248~253 microns, position
Setting the coating layer thickness being formed by curing at 14 is 206~262 microns, and the coating layer thickness being formed by curing at position 15 is 154~208 micro-
Meter, the coating layer thickness being formed by curing at position 16 is 243~272 microns, and the coating layer thickness being formed by curing at point 17 is 81~85
Micron reference table 2, using the prior art high-pressure electrostatic podwer gun 10 when, the coating layer thickness being formed by curing at position 13 is
200~217 microns, the coating layer thickness being formed by curing at position 14 is 16~58 microns, the painting thickness being formed by curing at position 15
Degree is 110~150 microns, and the coating layer thickness being formed by curing at position 16 is 109~130 microns, the painting being formed by curing at point 17
Layer is with a thickness of 133~152 microns.
From the data comparison in Tables 1 and 2 it is found that in position 4, position 5, position 6 and position 14, using of the invention real
The coating layer thickness being formed by curing when the electrostatic powder spraying device 20 of example carries out upper powder to sunk area 31 is applied, use is far longer than
The coating layer thickness being formed by curing when the high-pressure electrostatic podwer gun 10 of the prior art in sunk area 31.And the depth of sunk area 31
Spend it is bigger, using the prior art high-pressure electrostatic podwer gun 10 when the coating layer thickness that is formed by curing it is smaller, and the embodiment of the present invention
It still is able to meet generation standard 80~140 in the coating layer thickness that sunk area 31 (at position 4 and position 17) is formed by curing micro-
Rice.
It dusts when being the high-pressure electrostatic podwer gun 10 using the prior art shown in Fig. 9-14 what 4,5,14 positions were formed
The micro- enlarged drawing of the slice of coating, amplification factor are 100 times, be can be seen that from the data comparison of Fig. 9-14 and table 1,2 using this
The coating layer thickness that the electrostatic powder spraying device 20 of inventive embodiments is formed by curing when carrying out upper powder to sunk area 31 much compares
Using the prior art high-pressure electrostatic podwer gun 10 when the coating layer thickness that is formed by curing in sunk area 31 it is more uniform.
The embodiment of the present invention also provides a kind of Electrostatic Spraying of powder Coatings coating method as shown in figure 15.It please refers to shown in Figure 15, this
The Electrostatic Spraying of powder Coatings coating method of embodiment may include：
Step S41：The electrostatic field of force is generated between electric field producing element and element to be sprayed.
Step S42：Shaping is carried out to the electrostatic field of force using shapes electric field element.
Step S43：The charged powder particles in jet-stream wind are directed to member to be sprayed using the electrostatic field of force after shaping
The sunk area of part.
Wherein, the method that the electrostatic field of force after shapes electric field component shaping generates around the sunk area of element to be sprayed
Cage electrostatic screening effect is drawn to be less than the electrostatic field of force without shapes electric field component shaping in the sunk area week of element to be sprayed
Enclose the faraday cup electrostatic screening effect of generation.
Specifically, using discharge electrode needle formed charged powder particles, the axis of movement perpendicular to jet-stream wind extremely
On few dimension, the field distribution region in the electrostatic field of force after shapes electric field component shaping is less than whole without shapes electric field element
The field distribution region in the electrostatic field of force of shape, wherein it is preferred that the axis of movement of jet-stream wind and discharge electrode needle are in same straight line
On, and at least dimension may include X-axis, Y-axis and the Z axis in space three-dimensional rectangular coordinate system.
In the present embodiment, preferably by the insulation external member for the periphery for being set in electric field producing element to the electrostatic field of force
Shaping is carried out, and the external member that insulate is arranged in a tubular form, discharge electrode needle is set to the inside of insulation external member.In addition, insulation external member is extremely
Size in a few dimension is less than size of the sunk area in corresponding dimension.
Preferably, it can use the inside that jet-stream wind is directed to above-mentioned sunk area by above-mentioned insulation external member.
Further, the present embodiment preferably by diversion member, for directed spray air-flow, along axis of movement, helically transport by formula
Dynamic, diversion member can be integrally formed for sped structure and with insulation external member, and being used for directed spray air-flow around axis of movement is in spiral shell
Rotating movement slows down the flow velocity of jet-stream wind with this, reduces charged powder particles in the rebound of the inside of sunk area 31.
The Electrostatic Spraying of powder Coatings coating method of the present embodiment, the electrostatic powder spraying device 20 based on embodiment illustrated in fig. 2, spray
Details are not described herein again for the detailed process of painting.
Illustrate again, the above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all
It is special using technology between equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, such as each embodiment
Sign be combined with each other, and being applied directly or indirectly in other relevant technical fields, similarly includes protecting in patent of the invention
It protects in range.
Claims (16)
1. a kind of electrostatic powder spraying device, which is characterized in that the electrostatic powder spraying device includes：
Jet-stream wind producing element, for generating the jet-stream wind for carrying charged powder particles；
Electric field producing element, for generating between the electric field producing element and element to be sprayed for guiding the electrification powder
The electrostatic field of force of last particle；
Shapes electric field element, for carrying out shaping to the electrostatic field of force, to reduce the electrostatic force in the element to be sprayed
Sunk area around faraday cup electrostatic screening effect.
2. electrostatic powder spraying device according to claim 1, which is characterized in that the shapes electric field element is to be set in
The insulation external member of the periphery of the electric field producing element.
3. electrostatic powder spraying device according to claim 2, which is characterized in that in the fortune perpendicular to the jet-stream wind
On at least dimension of shaft line, the field distribution region in the electrostatic field of force after the shapes electric field component shaping is less than
The field distribution region in the electrostatic field of force without the shapes electric field component shaping.
4. electrostatic powder spraying device according to claim 3, which is characterized in that the insulation external member is described at least one
Size in a dimension is less than size of the sunk area in the corresponding dimension.
5. electrostatic powder spraying device according to claim 4, which is characterized in that the insulation external member is arranged in a tubular form.
6. electrostatic powder spraying device according to claim 2, which is characterized in that the jet-stream wind producing element is into one
Step includes the discharge electrode needle for being used to form the charged powder particles, wherein the discharge electrode needle is set to the insulation external member
It is internal.
7. electrostatic powder spraying device according to claim 2, which is characterized in that the free end setting of the insulation external member
The depressed area is directed at the inside that can extend into the sunk area to the element to be sprayed, and then by the jet-stream wind
The inside in domain.
8. electrostatic powder spraying device according to claim 1, which is characterized in that the electrostatic powder spraying device is into one
Step includes diversion member, and for guiding the jet-stream wind, around axis of movement, helically formula moves the diversion member.
9. a kind of Electrostatic Spraying of powder Coatings coating method, which is characterized in that the Electrostatic Spraying of powder Coatings coating method includes：
The electrostatic field of force is generated between electric field producing element and element to be sprayed；
Shaping is carried out to the electrostatic field of force using shapes electric field element；
The charged powder particles in jet-stream wind are directed to the element to be sprayed using the electrostatic field of force after shaping
Sunk area,
Wherein, the electrostatic field of force after the shapes electric field component shaping is around the sunk area of the element to be sprayed
The faraday cup electrostatic screening effect of generation be less than the electrostatic field of force without the shapes electric field component shaping it is described to
The faraday cup electrostatic screening effect generated around the sunk area of spray element.
10. Electrostatic Spraying of powder Coatings coating method according to claim 9, which is characterized in that described to utilize shapes electric field element pair
The electrostatic field of force carries out the step of shaping and includes：
Shaping is carried out to the electrostatic field of force using the insulation external member for the periphery for being set in the electric field producing element.
11. Electrostatic Spraying of powder Coatings coating method according to claim 10, which is characterized in that the utilization is set in the electric field
Producing element periphery insulation external member to the electrostatic field of force carry out shaping the step of include：
Institute on at least dimension of the axis of movement perpendicular to the jet-stream wind, after the shapes electric field component shaping
The field distribution region for stating the electrostatic field of force is less than the field distribution in the electrostatic field of force without the shapes electric field component shaping
Region.
12. Electrostatic Spraying of powder Coatings coating method according to claim 11, which is characterized in that the insulation external member it is described at least
Size in one dimension is less than size of the sunk area in the corresponding dimension.
13. Electrostatic Spraying of powder Coatings coating method according to claim 12, which is characterized in that the insulation external member is set in a tubular form
It sets.
14. Electrostatic Spraying of powder Coatings coating method according to claim 10, which is characterized in that described using described quiet after shaping
Charged powder particles in jet-stream wind are directed to the advance one of the step of sunk area of the element to be sprayed by field of electric force
Step includes：
The charged powder particles are formed using the discharge electrode needle being set to inside the insulation external member.
15. Electrostatic Spraying of powder Coatings coating method according to claim 10, which is characterized in that described using described quiet after shaping
Charged powder particles in jet-stream wind are directed to the step of sunk area of the element to be sprayed and include by field of electric force：
The jet-stream wind is directed to the inside of the sunk area using the insulation external member.
16. Electrostatic Spraying of powder Coatings coating method according to claim 9, which is characterized in that described using described quiet after shaping
Charged powder particles in jet-stream wind are directed to the step of sunk area of the element to be sprayed and include by field of electric force：
Using diversion member, for guiding the jet-stream wind, along axis of movement, helically formula is moved.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410373703.9A CN104162492B (en) | 2014-07-31 | 2014-07-31 | Electrostatic powder spraying device and its spraying method |
| PCT/CN2015/084994 WO2016015600A1 (en) | 2014-07-31 | 2015-07-24 | Electrostatic powder spray coating device and spray coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410373703.9A CN104162492B (en) | 2014-07-31 | 2014-07-31 | Electrostatic powder spraying device and its spraying method |
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| Publication Number | Publication Date |
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| CN104162492A CN104162492A (en) | 2014-11-26 |
| CN104162492B true CN104162492B (en) | 2018-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410373703.9A Active CN104162492B (en) | 2014-07-31 | 2014-07-31 | Electrostatic powder spraying device and its spraying method |
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| Country | Link |
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| CN (1) | CN104162492B (en) |
| WO (1) | WO2016015600A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162492B (en) * | 2014-07-31 | 2018-11-30 | 深圳市大富科技股份有限公司 | Electrostatic powder spraying device and its spraying method |
| CN105690246B (en) * | 2016-03-29 | 2018-08-24 | 贵州省新材料研究开发基地 | A kind of wheel grinding method and system of electrostatic spraying lubricant coating |
| CN108126839B (en) * | 2017-12-26 | 2021-02-26 | 江苏凯特汽车部件有限公司 | Electrostatic powder spraying device for large-diameter wide-rim deep Lip automobile aluminum hub |
| CN116056805B (en) * | 2020-08-21 | 2024-05-10 | Ａｇｃ株式会社 | Substrate with coating film, method for forming coating film, and method for producing substrate with coating film |
| CN112317164B (en) * | 2020-10-29 | 2021-11-23 | 北京曲线智能装备有限公司 | Spraying robot track control method and device and electronic equipment |
| CN113237786A (en) * | 2021-05-17 | 2021-08-10 | 青岛中邦科技发展有限公司 | Method and device for measuring one-time powder applying rate of enamel powder |
| CN116422515B (en) * | 2023-06-15 | 2023-08-29 | 泰州市姜堰区荣耀金属制品有限公司 | Multi-angle paint spraying apparatus with drying mechanism for metal support |
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| CN2116533U (en) * | 1992-03-25 | 1992-09-23 | 嘉仕企业股份有限公司 | Friction electrosatic application spray gun |
| US5885351A (en) * | 1997-02-18 | 1999-03-23 | Pfs Thermoplastic Powder Coatings, Inc. | Tribocharge applicator device |
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| CN204208696U (en) * | 2014-07-31 | 2015-03-18 | 深圳市大富科技股份有限公司 | Electrostatic powder spraying device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2599281B1 (en) * | 1986-05-30 | 1988-08-12 | Skm Sa | PROCESS FOR PRODUCING AN ELECTROSTATIC SPRAY GUN, AND GUN OBTAINED BY THIS PROCESS. |
| US20050194474A1 (en) * | 2004-03-03 | 2005-09-08 | Ransburg Industrial Finishing K.K. | Electrostatic atomizer for a painting robot |
| US20070048452A1 (en) * | 2005-09-01 | 2007-03-01 | James Feng | Apparatus and method for field-injection electrostatic spray coating of medical devices |
| CN200974047Y (en) * | 2006-09-29 | 2007-11-14 | 廖滨松 | Small-diameter pipeline inner wall static powder spraying gun |
| CN104162492B (en) * | 2014-07-31 | 2018-11-30 | 深圳市大富科技股份有限公司 | Electrostatic powder spraying device and its spraying method |
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2014
- 2014-07-31 CN CN201410373703.9A patent/CN104162492B/en active Active
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2015
- 2015-07-24 WO PCT/CN2015/084994 patent/WO2016015600A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2116533U (en) * | 1992-03-25 | 1992-09-23 | 嘉仕企业股份有限公司 | Friction electrosatic application spray gun |
| US5885351A (en) * | 1997-02-18 | 1999-03-23 | Pfs Thermoplastic Powder Coatings, Inc. | Tribocharge applicator device |
| CN101534956A (en) * | 2006-09-27 | 2009-09-16 | 裕东投资控股有限公司 | Powder spray coating discharge assembly |
| CN204208696U (en) * | 2014-07-31 | 2015-03-18 | 深圳市大富科技股份有限公司 | Electrostatic powder spraying device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104162492A (en) | 2014-11-26 |
| WO2016015600A1 (en) | 2016-02-04 |
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