CN104162492A - Electrostatic powder spraying device and spraying method thereof - Google Patents
Electrostatic powder spraying device and spraying method thereof Download PDFInfo
- Publication number
- CN104162492A CN104162492A CN201410373703.9A CN201410373703A CN104162492A CN 104162492 A CN104162492 A CN 104162492A CN 201410373703 A CN201410373703 A CN 201410373703A CN 104162492 A CN104162492 A CN 104162492A
- Authority
- CN
- China
- Prior art keywords
- electrostatic
- electric field
- shaping
- force
- sunk area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- 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
- B05B5/03—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
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
- B05D1/06—Applying particulate materials
Landscapes
- Electrostatic Spraying Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides an electrostatic powder spraying device and a spraying method of the electrostatic powder spraying device. The electrostatic powder spraying device comprises a jet airflow generating element, an electric field generating element and an electric field shaping element, wherein the jet airflow generating element is used for generating jet airflow carrying electrified powder particles, the electric field generating element is used for generating an electrostatic force field for guiding the electrified powder particles between the electric field generating element and an element to be sprayed, and the electric field shaping element is used for shaping the electrostatic force field so as to reduce the Faraday cage electrostatic shielding effect of electrostatic force around a concave area of the element to be sprayed. Due to the mode, the problem that no power can be applied to the concave area of the element to be sprayed because of the Faraday cage electrostatic shielding effect can be solved, and the powder applying depth in the concave area is increased.
Description
Technical field
The present invention relates to the high-pressure electrostatic technical field of dusting, in particular to a kind of electrostatic powder spraying device and spraying method thereof.
Background technology
Fig. 1 is the work schematic diagram of the high-pressure electrostatic podwer gun of prior art.Refer to shown in Fig. 1, high-pressure electrostatic podwer gun 10 is in the time dusting work, lance head 11 is applied to high-tension electricity with electric discharge, negative electrical charge on induction band in the time that the dusty spray mixing with high-pressure injection air-flow passes through lance head 11, to form charged powder particles and to fly to element 13 to be sprayed, now element 13 ground connection to be sprayed form positive pole, thereby generate the static field of force between lance head 11 and element to be sprayed 13, under the effect of electrostatic force, charged powder particles is adsorbed in the surface of element 13 to be sprayed, then make charged powder particles melting and solidification or plastify into coating through heating.
But, have the sunk areas 131 such as deeply recessed or groove during when the surface of element 13 to be sprayed, the high-pressure electrostatic podwer gun 10 of prior art cannot overcome the faraday cup electrostatic screening effect of electrostatic force around sunk area 131 in the time that sunk area 131 is sprayed, be the inside that the power line in the static field of force cannot enter sunk area 131, cause charged powder particles cannot be directed to by electrostatic force the inside of sunk area 131, thereby be reduced in the upper powder degree of depth of sunk area 131, even do not produce the problem of powder.
Summary of the invention
In view of this, embodiment of the present invention technical problem to be solved is to provide a kind of electrostatic powder spraying device and spraying method thereof, can solve the powder problem that do not go up that element to be sprayed produces because of faraday cup electrostatic screening effect at sunk area, improve the upper powder degree of depth at sunk area.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of electrostatic powder spraying device is provided, comprises: jet-stream wind generates element, for generating the jet-stream wind that carries charged powder particles; Electric field generates element, for generate the static field of force for guiding charged powder particles between electric field generation element and element to be sprayed; Electric field shaping element, for shaping is carried out in the static field of force, to reduce the faraday cup electrostatic screening effect of electrostatic force around the sunk area of element to be sprayed.
Wherein, electric field shaping element is the peripheral insulation external member that is set in electric field generation element.
Wherein, at least one dimension of the axis of movement perpendicular to jet-stream wind, the Electric Field Distribution region in the static field of force after the shaping of electric field shaping element is less than the Electric Field Distribution region without the static field of force of electric field shaping element shaping.
Wherein, the size of insulation external member at least one dimension is less than the size of sunk area in corresponding dimension.
Wherein, insulation external member arranges in a tubular form.
Wherein, jet-stream wind generates element and further comprises the discharge electrode pin that is used to form charged powder particles, and wherein discharge electrode pin is arranged at the inside of insulation external member.
Wherein, the free end of insulation external member is arranged to the inside of the sunk area that can stretch to element to be sprayed, and then jet-stream wind is directed to the inside of sunk area.
Wherein, electrostatic powder spraying device further comprises diversion member, and diversion member is screw movement for directed spray air-flow around axis of movement.
For solving the problems of the technologies described above, another technical solution used in the present invention is: a kind of Electrostatic Spraying of powder Coatings coating method is provided, comprises: generate between element and element to be sprayed and generate the static field of force at electric field; Utilize electric field shaping element to carry out shaping to the static field of force; Utilize the static field of force after shaping the charged powder particles in jet-stream wind to be directed to the sunk area of element to be sprayed, wherein, the faraday cup electrostatic screening effect producing around the sunk area of the static field of force after the shaping of electric field shaping element at element to be sprayed is less than the static field of force without the shaping of the electric field shaping element sunk area faraday cup electrostatic screening effect of generation around at element to be sprayed.
Wherein, the step of utilizing electric field shaping element to carry out shaping to the static field of force comprises: utilize the peripheral insulation external member that is set in electric field generation element to carry out shaping to the static field of force.
Wherein, utilization is set in electric field and generates the step that the peripheral insulation external member of element carries out shaping to the static field of force and comprise: at least one dimension of the axis of movement perpendicular to jet-stream wind, the Electric Field Distribution region in the static field of force after the shaping of electric field shaping element is less than the Electric Field Distribution region without the static field of force of electric field shaping element shaping.
Wherein, the size of insulation external member at least one dimension is less than the size of sunk area in corresponding dimension.
Wherein, insulation external member arranges in a tubular form.
Wherein, utilize the static field of force after shaping further to comprise before the charged powder particles in jet-stream wind being directed to the step of sunk area of element to be sprayed: to utilize the discharge electrode pin that is arranged at insulation external member inside to form charged powder particles.
Wherein, the step of utilizing the static field of force after shaping that the charged powder particles in jet-stream wind is directed to the sunk area of element to be sprayed comprises: utilize insulation external member jet-stream wind to be directed to the inside of sunk area.
Wherein, the step of utilizing the static field of force after shaping that the charged powder particles in jet-stream wind is directed to the sunk area of element to be sprayed comprises: utilize diversion member to be screw movement for directed spray air-flow along axis of movement.
Pass through technique scheme, the beneficial effect that the embodiment of the present invention produces is: design electrostatic powder spraying device comprises electric field shaping element, shaping is carried out in the static field of force that electric field is generated to element generation by electric field shaping element, not only make the dusty spray can be charged to ensure enough directed forces, and can reduce the static field of force between electric field shaping element and element to be sprayed, thereby reduce the faraday cup electrostatic screening effect of electrostatic force around the sunk area of element to be sprayed, solve the powder problem that do not go up that sunk area produces because of faraday cup electrostatic screening effect around, improve the upper powder degree of depth of element to be sprayed at sunk area.
Brief description of the drawings
Fig. 1 is the work schematic diagram of the high-pressure electrostatic podwer gun of prior art;
Fig. 2 is the structural representation 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 adopts electrostatic powder spraying device of the present invention on element to be sprayed, to solidify to form the schematic diagram of the preferred embodiment of coating;
Fig. 5 is along element to be sprayed shown in Fig. 4 along the cutaway view of A-A direction;
Fig. 6 is along element to be sprayed shown in Fig. 4 along the cutaway view of B-B direction;
Fig. 7 is along element to be sprayed shown in Fig. 4 along the cutaway view of C-C direction;
Fig. 8 is along element to be sprayed shown in Fig. 4 along the cutaway view of D-D direction;
Fig. 9-10th, adopts the high-pressure electrostatic podwer gun of prior art at the enlarged diagram of the coating at 4 places, position;
Figure 11-12nd, the enlarged diagram of the coating that the high-pressure electrostatic podwer gun of employing prior art solidify to form at 5 places, position;
Figure 13-14th, the enlarged diagram of the coating that the high-pressure electrostatic podwer gun of employing prior art solidify to form at 14 places, position;
Figure 15 is the schematic flow sheet of the Electrostatic Spraying of powder Coatings coating method of the preferred embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, the following described embodiment of the present invention is only a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making all other embodiment that obtain under creative work prerequisite, belong to the scope of protection of the invention.
Please, again in conjunction with shown in Fig. 1, in the process of dusting at high-pressure electrostatic, the generation principle of sunk area faraday cup electrostatic screening effect is around specific as follows:
While electric discharge due to lance head, can produce electronegative free ion, make to exist between lance head and element to be sprayed a cloud cluster being formed by charged powder particles and electronegative free ion, between this cloud cluster and element to be sprayed, certainly will produce certain electric field, conventionally be referred to as space charge field.Therefore electric field and space charge field that the surperficial electric field that, is close to element to be sprayed produces while applying high-pressure electrostatic by lance head in fact form.The common steering tape electro-powder of the aerodynamic force particle deposition that these two electric fields and jet-stream wind provide is to the surface of element to be sprayed, powder in realization.
Have the sunk areas such as deeply recessed or groove during when the surface of element to be sprayed, the power line in the static field of force can focus on has minimum electric field resistance part, i.e. the surrounding of sunk area (edge) causes power line can not enter the inside of sunk area.
On the one hand, because charged powder particles is subject to the effect of electrostatic force and the direction of power line is the direction of electrostatic force, therefore power line can not enter the inside that the inside of sunk area causes charged powder particles to enter sunk area and also just lacked an important motive force.
On the other hand, the increase of edge's field intensity makes charged powder particles more be adsorbed in this edge, and causing obviously increases at the deposit thickness of edge's charged powder particles of sunk area, inevitably produces two negative effects.One, because charged powder particles is directed to the edge of sunk area by electrostatic force, thereby only has little charged powder particles to enter the inside of sunk area.Its two, while applying high-pressure electrostatic due to lance head, the free ion of discharge generation can be deposited on along power line the edge of sunk area, before making, the charged powder particles of deposition is saturated by unnecessary electric charge institute rapidly, causes reverse ionization very rapidly and strong.
Because charged powder particles is the surface that the aerodynamic force of injected air-flow and electrostatic force are directed to element to be sprayed jointly, and very easily make charged powder particles be difficult for deposition by the bounce-back of the surface of element to be sprayed compared with high aerodynamic force, while therefore spraying, must have enough strong electric field that electric field force is provided.But, no matter sunk area faraday cup electrostatic screening effect is around the electric field of lance head discharge generation if making, or the space charge field of charged powder particles and free ion formation all can not enter the inside of sunk area, unique power-assisted that therefore can help charged powder particles to enter the inside of sunk area is exactly--the electric field that " cloud cluster " that the charged powder particles that transmitted by jet-stream wind in the inside of sunk area and free ion form produces.
Based on above-mentioned, it is not the unique difficult problem that solution sunk area cannot be gone up powder that the configuration in the known static field of force and power line are concentrated in the edge of sunk area, because if by sunk area being carried out to enough spraying for a long time, in the time that edge deposits certain thickness charged powder particles, other charged powder particles just can not be again in this edge's deposition, and unique place to go can only be just the inside that enters sunk area.But, due to the cause of reverse ion, if the degree of depth of sunk area is large or width is less, the reverse ionization that its edge develops rapidly will produce positively charged ion, and try hard to will be reduced carried charge through the marginal deposit of sunk area by these ions to inner charged powder particles, cause to be pushed to by jet-stream wind electric field that charged powder particles and " cloud cluster " that free ion forms of the inside of sunk area produce and cannot to produce enough strong electrostatic force and overcome air turbulence and charged powder particles is deposited.
Even if adopt secondary spraying, after being heating and curing for the first time, spray for the second time again, sunk area can not be solved and powder problem cannot be gone up because of what faraday cup electrostatic screening effect produced, because the free ion of discharge generation has motion fast between lance head and element to be sprayed, and its movement velocity is again far away higher than the movement velocity of charged powder particles, in the time that moving to element to be sprayed surperficial, free ion can be increased in rapidly the electric charge of curing coating, its reason is that curing coating has larger dielectric constant than uncured coating, there is better insulating properties.Therefore, the electric charge that takes element surface to be sprayed to by free ion cannot leak in earth-return circuit and go, and makes free ion increase rapidly the electric charge in coating, thereby further causes back-ionization, and powder utilization is acutely declined.When practical application, the depth-to-width ratio of sunk area exceedes 5:1 just can not make its evenly upper powder.
Known according to above-mentioned principle, for making sunk area can go up powder, need to solve three problems: the first, when spraying, avoid the surface of lance head and element to be sprayed to produce the powerful static field of force, avoid producing faraday cup electrostatic screening effect at sunk area with this; The second, need to make dusty spray can bring high-pressure electrostatic, can drop and can not deposit if dusty spray does not bring high pressure negative electrical charge to be affected by gravity; The 3rd, sunk area is that an air is all difficult to the semi-enclosed chamber entering, and how dusty spray effectively can be directed to the inside of sunk area.
Accordingly, main purpose of the present invention is to provide a kind of electrostatic powder spraying device and the Electrostatic Spraying of powder Coatings coating method based on this device, to solve above-mentioned three problems.
Fig. 2 is the structural representation of the electrostatic powder spraying device of one embodiment of the invention.Refer to shown in Fig. 2, electrostatic powder spraying device 20 can comprise that jet-stream wind generates element 21, electric field generates element 22, electric field shaping element 23 and agent structure 25.Wherein:
Jet-stream wind generates element 21 and is arranged in agent structure 25 inner chambers, electric field generates element 22 and is arranged at the side of agent structure 25 near element 30 to be sprayed, and electric field shaping element 23 is set in electric field and generates the peripheral of element 22 and removably connect with agent structure 25.The preferred electric field shaping element 23 of the present embodiment is the insulation external member arranging in a tubular form, preferably insulation external member adopts the high impedance insulating materials such as for example PTFE (Polytetrafluoroethylene, Teflon, polytetrafluoroethylene (PTFE) or Teflon), pottery to make.
Jet-stream wind generates element 21 can comprise discharge electrode pin 211, and the discharge electrode pin 211 of jet-stream wind generation element 21 is arranged at the inside of this insulation external member, is used to form charged powder particles.
The element to be sprayed 30 transmitting on to conveying 40 at electrostatic powder spraying device 20 is while dusting work, agent structure 25 ground connection and holding part are connected high-pressure electrostatic, are imported dusty spray and compressed air, electric field generates element 22 and can be used for connecting high-pressure electrostatic, and generates between element 22 and element to be sprayed 30 and generate the static field of force at electric field.
Jet-stream wind generates element 21 and can be used for dusty spray and compressed air ejection, when ejection, dusty spray negative electrical charge on the band of the static field of force forms charged powder particles, is mixed in compressed air, to form jet-stream wind and generate element 21 by jet-stream wind to spray.
Shaping is carried out in the static field of force that electric field shaping element 23 can be used for electric field to generate between element 22 and element to be sprayed 30, to reduce the faraday cup electrostatic screening effect of electrostatic force around the sunk area 31 of element to be sprayed, make electrostatic force field energy enough guide the sunk area 31 that charged powder particles makes it be deposited on element 30 to be sprayed.Particularly, in a dimension of the axis of movement A perpendicular to jet-stream wind, the Electric Field Distribution region in the static field of force after 23 shapings of electric field shaping element is less than the Electric Field Distribution region without the static field of force of electric field shaping element 23 shapings.
In the present embodiment, preferably the axis of movement A of jet-stream wind and discharge electrode pin 211 are on same straight line, and preferably a dimension is the Y-axis in space three-dimensional rectangular coordinate system.Certainly in other embodiments, according to the shape that arranges of insulation external member, can be in the multiple dimensions of the axis of movement A perpendicular to jet-stream wind, the Electric Field Distribution region in the static field of force after 23 shapings of electric field shaping element is less than the Electric Field Distribution region without the static field of force of electric field shaping element 23 shapings, and wherein multiple dimensions also can comprise X-axis, Y-axis and the Z axis in space three-dimensional rectangular coordinate system.
Further, the size of insulation external member at least one dimension is less than the size of sunk area 31 in corresponding dimension (Y-axis), and the width of the external member that for example insulate is less than the width of sunk area 31.And the free end (towards one end of sunk area 31) of insulation external member is arranged to the inside of the sunk area 31 that can stretch to element 30 to be sprayed, thereby jet-stream wind can be directed to the inside of sunk area 31.
The present embodiment can be according to the contour structures of element 30 to be sprayed and sunk area 31, the free end of insulation external member is processed into the sharp mouth of the inside that can directly put in sunk area 31, the various shapes such as twitch one's mouth, its objective is that the inside that charged powder particles can be delivered directly to sunk area 31 is to complete even spraying, thereby solve above-mentioned the 3rd problem, all be difficult to even if sunk area 31 is air the semi-enclosed chamber entering, also dusty spray (charged powder particles) effectively can be directed to the inside of sunk area 31.
Based on above-mentioned, known the present embodiment is because electric field shaping element 23 (insulation external member) is to make an isolation overcoat according to the profile of electrostatic powder spraying device 20, utilize its insulation characterisitic isolation electric field to generate the powerful static field of force producing between element 22 and element to be sprayed 30, thereby can avoid around depressed area 31 (edge) to produce faraday cup electrostatic screening effect.
And, due to electric field is generated element 22 and discharge electrode pin 211 thereof be arranged at insulation external member inside, be equivalent to change outer electric discharge into internal discharge mode, can solve above-mentioned Second Problem and make high-pressure electrostatic on dusty spray band, can solve again above-mentioned first problem, avoid producing the high-pressure electrostatic field of force due to discharge electrode pin 211 discharge generation between electric field generation element 22 and element to be sprayed 30, thereby dusty spray effectively can be directed to the inside of sunk area 31, improve the upper powder degree of depth at sunk area 31, in the time of practical application electrostatic powder spraying device 20 can to depth-to-width ratio reach 10:1 and above sunk area 31 carry out evenly on powder.
Please again consult shown in Fig. 3, electrostatic powder spraying device 20 can further include diversion member 24, can be for reducing jet-stream wind flow velocity.And preferably diversion member 24 is arranged at the inwall of the first area D1 of insulation external member, can certainly be arranged at 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 instance, the preferred diversion member 24 of the present embodiment is sped structure and one-body molded with insulation external member, screw type diversion member 24 is screw movement for directed spray air-flow around axis of movement, slow down the flow velocity of jet-stream wind with this, reduce the bounce-back of charged powder particles in the inside of sunk area 31, be not limited only to the bottom and the sidewall that is held on bottom of sunk area 31, thereby increase the deposition of charged powder particles in the inside of sunk area 31, promote the powder utilization of sunk area 31.
It should be noted that, in electrostatic powder spraying device 20 shown in Fig. 2, each structure can be carried out other settings, the first area D1 of the external member that for example insulate can only be set to upper and lower two plate bodys, or interface is triangular in shape, diversion member 24 can arrange other structures, be not limited in the sped structure shown in Fig. 3, as long as can slow down the flow velocity of jet-stream wind, reduce the bounce-back of charged powder particles in the inside of sunk area 31.
Below in conjunction with the practical application scene shown in Fig. 4, taking element 30 to be sprayed as " radiation tooth " is as shown in Figure 4 as example, and use respectively the electrostatic powder spraying device 20 of the present embodiment and high-pressure electrostatic podwer gun 10 of the prior art all to carry out the spraying work of approximately 3.5 minutes, after powder curing, the coating layer thickness of the 1～position, mode measuring position 17 by film thickness gauge and section, the coating layer thickness data that data in following table 1 obtain for the electrostatic powder spraying device 20 that adopts the present embodiment to provide, data in following table 2 are the coating layer thickness data that adopt electrostatic powder spraying device 10 of the prior art to obtain, numerical value unit in table 1 and 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, first section along A-A line of element 30 to be sprayed, reference table 1, the coating layer thickness solidifying to form at 1 place, position after the electrostatic powder spraying device 20 that adopts the present embodiment to provide dusts is 172～177 microns, the coating layer thickness that 2 places, position solidify to form is 116～126 microns, the coating layer thickness that 3 places, position solidify to form is 170～189 microns, and the coating layer thickness that 4 places, position solidify to form is 187～225 microns.Reference table 2, while adopting the high-pressure electrostatic podwer gun 10 of prior art, the coating layer thickness solidifying to form at 1 place, position is 129～157 microns, the coating layer thickness that 2 places, position solidify to form is 90～114 microns, the coating layer thickness that 3 places, position solidify to form is 161～185 microns, and the coating layer thickness that 4 places, position solidify to form is 0～36 micron.
As shown in Figure 6, second section along B-B line of element 30 to be sprayed, reference table 1, the coating layer thickness solidifying to form at 5 places, position after the electrostatic powder spraying device 20 that adopts the present embodiment to provide dusts is 93～165 microns, the coating layer thickness that 6 places, position solidify to form is 104～118 microns, the coating layer thickness that 7 places, position solidify to form is 108～127 microns, and the coating layer thickness that 8 places, position solidify to form is 129～148 microns.Reference table 2, while adopting the high-pressure electrostatic podwer gun 10 of prior art, it is 8～65 microns at the coating layer thickness at 5 places of solidifying to form, position, the coating layer thickness that 6 places, position solidify to form is 18～52 microns, the coating layer thickness that 7 places, position solidify to form is 80～92 microns, and the coating layer thickness that 8 places, position solidify to form is 84～106 microns.
As shown in Figure 7, the 3rd section along C-C line of element 30 to be sprayed, reference table 1, the coating layer thickness solidifying to form at 9 places, position after the electrostatic powder spraying device 20 that adopts the present embodiment to provide dusts is 104～131 microns, the coating layer thickness that 10 places, position solidify to form is 154～201 microns, the coating layer thickness that 11 places, position solidify to form is 89～95 microns, and the coating layer thickness that 12 places, position solidify to form is 159～170 microns.Reference table 2, while adopting the high-pressure electrostatic podwer gun 10 of prior art, the coating layer thickness solidifying to form at 9 places, position is 119～122 microns, the coating layer thickness that 10 places, position solidify to form is 113～117 microns, the coating layer thickness that 11 places, position solidify to form is 76～93 microns, and the coating layer thickness that 12 places, position solidify to form is 88～105 microns.
As shown in Figure 8, the 4th section along D-D line of element 30 to be sprayed, reference table 1, the coating layer thickness solidifying to form at 13 places, position after the electrostatic powder spraying device 20 that adopts the present embodiment to provide dusts is 248～253 microns, the coating layer thickness that 14 places, position solidify to form is 206～262 microns, the coating layer thickness that 15 places, position solidify to form is 154～208 microns, the coating layer thickness that 16 places, position solidify to form is 243～272 microns, the coating layer thickness that point 17 places solidify to form is 81～85 microns of reference tables 2, while adopting the high-pressure electrostatic podwer gun 10 of prior art, the coating layer thickness solidifying to form at 13 places, position is 200～217 microns, the coating layer thickness that 14 places, position solidify to form is 16～58 microns, the coating layer thickness that 15 places, position solidify to form is 110～150 microns, the coating layer thickness that 16 places, position solidify to form is 109～130 microns, the coating layer thickness that point 17 places solidify to form is 133～152 microns.
Data Comparison from table 1 and table 2 is known, in position 4, position 5, position 6 and position 14, the coating layer thickness that the electrostatic powder spraying device 20 of the employing embodiment of the present invention solidify to form when sunk area 31 is carried out to upper powder, the coating layer thickness solidifying to form at sunk area 31 while being far longer than the high-pressure electrostatic podwer gun 10 that adopts prior art.And the degree of depth of sunk area 31 is larger, the coating layer thickness solidifying to form while adopting the high-pressure electrostatic podwer gun 10 of prior art is less, and the coating layer thickness that the embodiment of the present invention solidify to form at sunk area 31 (position 4 and 17 places, position) still can meet 80～140 microns of generation standards.
Shown in Fig. 9-14 is the micro-enlarged drawing of section of the coating of dusting that forms in 4,5,14 positions while adopting the high-pressure electrostatic podwer gun 10 of prior art, multiplication factor is 100 times, from Fig. 9-14 and table 1,2 Data Comparison can find out, the coating layer thickness solidifying to form while adopting the electrostatic powder spraying device 20 of the embodiment of the present invention to carry out upper powder to sunk area 31, far away than adopt prior art high-pressure electrostatic podwer gun 10 time the coating layer thickness that solidify to form at sunk area 31 more even.
The embodiment of the present invention also provides a kind of Electrostatic Spraying of powder Coatings coating method as shown in figure 15.Refer to shown in Figure 15, the Electrostatic Spraying of powder Coatings coating method of the present embodiment can comprise:
Step S41: generate between element and element to be sprayed and generate the static field of force at electric field.
Step S42: utilize electric field shaping element to carry out shaping to the static field of force.
Step S43: utilize the static field of force after shaping the charged powder particles in jet-stream wind to be directed to the sunk area of element to be sprayed.
Wherein, the faraday cup electrostatic screening effect producing around the sunk area of the static field of force after the shaping of electric field shaping element at element to be sprayed is less than the static field of force without the shaping of the electric field shaping element sunk area faraday cup electrostatic screening effect of generation around at element to be sprayed.
Particularly, utilize discharge electrode pin to form charged powder particles, in at least one dimension of the axis of movement perpendicular to jet-stream wind, the Electric Field Distribution region in the static field of force after the shaping of electric field shaping element is less than the Electric Field Distribution region without the static field of force of electric field shaping element shaping, wherein preferably the axis of movement of jet-stream wind and discharge electrode pin are on same straight line, and at least one dimension can comprise X-axis, Y-axis and Z axis in space three-dimensional rectangular coordinate system.
In the present embodiment, preferably utilize to be set in the peripheral insulation external member that electric field generates element shaping is carried out in the described static field of force, and insulation external member arranges in a tubular form, discharge electrode pin is arranged at the inside of insulation external member.In addition, the size of insulation external member at least one dimension is less than the size of sunk area in corresponding dimension.
Preferably, can utilize above-mentioned insulation external member jet-stream wind to be directed to the inside of above-mentioned sunk area.
Further, the present embodiment preferably utilizes diversion member to be screw movement for directed spray air-flow along axis of movement, diversion member can be sped structure and one-body molded with insulation external member, be screw movement for directed spray air-flow around axis of movement, the flow velocity that slows down jet-stream wind with this, reduces the bounce-back of charged powder particles in 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, the detailed process of its spraying repeats no more herein.
Explanation again; the foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention and accompanying drawing content to do; for example the mutually combining of technical characterictic between each embodiment; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (16)
1. an electrostatic powder spraying device, is characterized in that, described electrostatic powder spraying device comprises:
Jet-stream wind generates element, for generating the jet-stream wind that carries charged powder particles;
Electric field generates element, for generate the static field of force for guiding described charged powder particles between described electric field generation element and element to be sprayed;
Electric field shaping element, for shaping is carried out in the described static field of force, to reduce the faraday cup electrostatic screening effect of described electrostatic force around the sunk area of described element to be sprayed.
2. electrostatic powder spraying device according to claim 1, is characterized in that, described electric field shaping element is the peripheral insulation external member that is set in described electric field generation element.
3. electrostatic powder spraying device according to claim 2, it is characterized in that, in at least one dimension of the axis of movement perpendicular to described jet-stream wind, the Electric Field Distribution region in the described static field of force after the shaping of described electric field shaping element is less than the Electric Field Distribution region without the described static field of force of described electric field shaping element shaping.
4. electrostatic powder spraying device according to claim 3, is characterized in that, the size of described insulation external member in described at least one dimension is less than the size of described sunk area in the described dimension of correspondence.
5. electrostatic powder spraying device according to claim 4, is characterized in that, described insulation external member arranges in a tubular form.
6. electrostatic powder spraying device according to claim 2, is characterized in that, described jet-stream wind generates element and further comprises the discharge electrode pin that is used to form described charged powder particles, and wherein said discharge electrode pin is arranged at the inside of described insulation external member.
7. electrostatic powder spraying device according to claim 2, it is characterized in that, the free end of described insulation external member is arranged to the inside of the sunk area that can stretch to described element to be sprayed, and then described jet-stream wind is directed to the inside of described sunk area.
8. electrostatic powder spraying device according to claim 1, is characterized in that, described electrostatic powder spraying device further comprises diversion member, and described diversion member is used for guiding described jet-stream wind and is screw movement around axis of movement.
9. an Electrostatic Spraying of powder Coatings coating method, is characterized in that, described Electrostatic Spraying of powder Coatings coating method comprises:
Generate between element and element to be sprayed and generate the static field of force at electric field;
Utilize electric field shaping element to carry out shaping to the described static field of force;
Utilize the described static field of force after shaping the charged powder particles in jet-stream wind to be directed to the sunk area of described element to be sprayed,
Wherein, the faraday cup electrostatic screening effect producing around the sunk area of the described static field of force after the shaping of described electric field shaping element at described element to be sprayed is less than the described static field of force without the shaping of the described electric field shaping element sunk area faraday cup electrostatic screening effect of generation around at described element to be sprayed.
10. Electrostatic Spraying of powder Coatings coating method according to claim 9, is characterized in that, the described step of utilizing electric field shaping element to carry out shaping to the described static field of force comprises:
Utilization is set in the peripheral insulation external member of described electric field generation element shaping is carried out in the described static field of force.
11. Electrostatic Spraying of powder Coatings coating methods according to claim 10, is characterized in that, described utilization is set in the step that peripheral insulation external member that described electric field generates element carries out shaping to the described static field of force and comprises:
In at least one dimension of the axis of movement perpendicular to described jet-stream wind, the Electric Field Distribution region in the described static field of force after the shaping of described electric field shaping element is less than the Electric Field Distribution region without the described static field of force of described electric field shaping element shaping.
12. Electrostatic Spraying of powder Coatings coating methods according to claim 11, is characterized in that, the size of described insulation external member in described at least one dimension is less than the size of described sunk area in the described dimension of correspondence.
13. Electrostatic Spraying of powder Coatings coating methods according to claim 12, is characterized in that, described insulation external member arranges in a tubular form.
14. Electrostatic Spraying of powder Coatings coating methods according to claim 10, is characterized in that, before the described step of utilizing the sunk area that the described static field of force after shaping is directed to the charged powder particles in jet-stream wind described element to be sprayed, further comprise:
The discharge electrode pin that utilization is arranged at described insulation external member inside forms described charged powder particles.
15. Electrostatic Spraying of powder Coatings coating methods according to claim 10, is characterized in that, the described step of utilizing the described static field of force after shaping that the charged powder particles in jet-stream wind is directed to the sunk area of described element to be sprayed comprises:
Utilize described insulation external member described jet-stream wind to be directed to the inside of described sunk area.
16. Electrostatic Spraying of powder Coatings coating methods according to claim 9, is characterized in that, the described step of utilizing the described static field of force after shaping that the charged powder particles in jet-stream wind is directed to the sunk area of described element to be sprayed comprises:
Utilize diversion member to be screw movement for guiding described jet-stream wind along axis of movement.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104162492A true CN104162492A (en) | 2014-11-26 |
| CN104162492B CN104162492B (en) | 2018-11-30 |
Family
ID=51906589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410373703.9A Active CN104162492B (en) | 2014-07-31 | 2014-07-31 | Electrostatic powder spraying device and its spraying method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104162492B (en) |
| WO (1) | WO2016015600A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016015600A1 (en) * | 2014-07-31 | 2016-02-04 | 深圳市大富科技股份有限公司 | Electrostatic powder spray coating device and spray coating method |
| CN105690246A (en) * | 2016-03-29 | 2016-06-22 | 贵州省新材料研究开发基地 | Grinding wheel grinding method and system of electrostatic sprayed lubricating coating |
| CN108126839A (en) * | 2017-12-26 | 2018-06-08 | 江苏凯特汽车部件有限公司 | A kind of static powder-spraying device of the wide wheel rim depth Lip automobile aluminum wheel hubs of major diameter |
| CN116056805A (en) * | 2020-08-21 | 2023-05-02 | Ａｇｃ株式会社 | Substrate with coating film, method for forming coating film, and method for producing substrate with coating film |
| CN116422515A (en) * | 2023-06-15 | 2023-07-14 | 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 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (5)
| 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 |
| WO2007030317A2 (en) * | 2005-09-01 | 2007-03-15 | Boston Scientific Scimed, Inc. | Apparatus and method for field-injection electrostatic spray coating of medical devices |
| 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 |
Family Cites Families (4)
| 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 |
| 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 |
-
2014
- 2014-07-31 CN CN201410373703.9A patent/CN104162492B/en active Active
-
2015
- 2015-07-24 WO PCT/CN2015/084994 patent/WO2016015600A1/en active Application Filing
Patent Citations (5)
| 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 |
| WO2007030317A2 (en) * | 2005-09-01 | 2007-03-15 | Boston Scientific Scimed, Inc. | Apparatus and method for field-injection electrostatic spray coating of medical devices |
| 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 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016015600A1 (en) * | 2014-07-31 | 2016-02-04 | 深圳市大富科技股份有限公司 | Electrostatic powder spray coating device and spray coating method |
| CN105690246A (en) * | 2016-03-29 | 2016-06-22 | 贵州省新材料研究开发基地 | Grinding wheel grinding method and system of electrostatic sprayed lubricating coating |
| CN108126839A (en) * | 2017-12-26 | 2018-06-08 | 江苏凯特汽车部件有限公司 | A kind of static powder-spraying device of the wide wheel rim depth Lip automobile aluminum wheel hubs of major diameter |
| 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 |
| CN116056805A (en) * | 2020-08-21 | 2023-05-02 | Ａｇｃ株式会社 | Substrate with coating film, method for forming coating film, and method for producing substrate with coating film |
| 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 |
| CN116422515A (en) * | 2023-06-15 | 2023-07-14 | 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104162492B (en) | 2018-11-30 |
| WO2016015600A1 (en) | 2016-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104162492A (en) | Electrostatic powder spraying device and spraying method thereof | |
| CN203747161U (en) | Electric connector | |
| CN203635379U (en) | Multi-electrode charging electrostatic spray head | |
| CN105170359A (en) | Programmed type electrostatic spraying device | |
| CN204208696U (en) | Electrostatic powder spraying device | |
| MY185093A (en) | Apparatus and process for depositing a thin layer of resist on a substrate | |
| CN102922891A (en) | Electro-hydraulic jet printing device of metal micro-nanometer structure | |
| CN203235718U (en) | Air knife and substrate coating equipment | |
| CN207690572U (en) | A kind of conductor coating unit | |
| CN106735576A (en) | A kind of bearing block blanking cutter sweep | |
| CN103780140B (en) | A kind of coplanar type friction generator | |
| CN203659796U (en) | Ultrasonic atomization plasma processing device | |
| CN103957655B (en) | Electron helical accelerator | |
| CN203741411U (en) | PECVD (Plasma Enhanced Chemical Vapor Deposition) gas inlet structure | |
| CN203233588U (en) | Emitting device with single electrode generation of low temperature plasma flow under atmospheric pressure condition | |
| CN103794462A (en) | Ultrasonic atomization plasma processing device | |
| CN203918798U (en) | Electromagnetic force spray shot device | |
| CN202713767U (en) | On-line static electricity elimination device for producing ethylene vinyl acetate (EVA) plastic film | |
| CN206283704U (en) | A kind of Xelminator ionic wind nozzle | |
| CN103037610B (en) | Launching device for single electrode producing low-temperature plasma flow under the atmospheric pressure condition | |
| CN203972265U (en) | A kind of cable processing technology special-purpose electrostatic dusting device | |
| CN202160327U (en) | High-power ionic bar | |
| CN204589257U (en) | A kind of net electrode for metal strip thermal treatment cooling | |
| CN204208766U (en) | A kind of double end station duster | |
| CN206059911U (en) | A kind of anion generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 233000 building 4, national financial incubation Industrial Park, 17 Yannan Road, high tech Zone, Bengbu City, Anhui Province Patentee after: Dafu Technology (Anhui) Co., Ltd Address before: 518108, Guangdong, Shenzhen province Baoan District manhole Street oyster road manhole Industrial Company Third Industrial Zone A1, A2, A3 101 and 2 layers, A4 Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |