CN204208696U - Electrostatic powder spraying device - Google Patents
Electrostatic powder spraying device Download PDFInfo
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- CN204208696U CN204208696U CN201420429495.5U CN201420429495U CN204208696U CN 204208696 U CN204208696 U CN 204208696U CN 201420429495 U CN201420429495 U CN 201420429495U CN 204208696 U CN204208696 U CN 204208696U
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Abstract
The utility model provides a kind of electrostatic powder spraying device.This electrostatic powder spraying device comprises 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 carrying charged powder particles, electric field producing element is used for the electrostatic field of force generated between electric field producing element and element to be sprayed for guiding charged powder particles, shapes electric field element is used for carrying out shaping to the electrostatic field of force, to reduce the faraday cup electrostatic screening effect of electrostatic force around the sunk area of element to be sprayed.By the way, what the utility model can solve that element to be sprayed produces because of faraday cup electrostatic screening effect at sunk area does not go up powder problem, improves the upper powder degree of depth at sunk area.
Description
Technical field
The utility model relates to high-pressure electrostatic and to dust technical field, in particular to a kind of electrostatic powder spraying device.
Background technology
Fig. 1 is the operating diagram of the high-pressure electrostatic podwer gun of prior art.Refer to shown in Fig. 1, high-pressure electrostatic podwer gun 10 is when dusting work, high-tension electricity is applied with electric discharge to lance head 11, the negative electrical charge on induction band when the dusty spray mixed with high-pressure injection air-flow is 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 forms positive pole, thus the electrostatic field of force is generated 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 through heating or plastify into coating.
But, when there are the sunk areas 131 such as deeply recessed or groove on 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 when spraying sunk area 131, namely the power line in the electrostatic field of force cannot enter the inside of sunk area 131, cause charged powder particles cannot be directed to the inside of sunk area 131 by electrostatic force, thus be reduced in the upper powder degree of depth of sunk area 131, even do not produce the problem of powder.
Utility model content
In view of this, the utility model embodiment technical problem to be solved is to provide a kind of electrostatic powder spraying device, what can solve that element to be sprayed produces because of faraday cup electrostatic screening effect at sunk area does not go up powder problem, improves the upper powder degree of depth at sunk area.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: provide a kind of electrostatic powder spraying device, comprising: jet-stream wind producing element, for generating the jet-stream wind carrying charged powder particles; Electric field producing element, for generating the electrostatic field of force for guiding charged powder particles between electric field producing element and element to be sprayed; Shapes electric field element, for carrying out shaping to the electrostatic field of force, to reduce the faraday cup electrostatic screening effect of electrostatic force around the sunk area of element to be sprayed.
Wherein, shapes electric field element is the insulation external member of the periphery being set in electric field producing element.
Wherein, at least one dimension of the axis of movement perpendicular to jet-stream wind, the Electric Field Distribution region in the electrostatic field of force after shapes electric field component shaping is less than the Electric Field Distribution region in the electrostatic field of force without shapes electric field component shaping.
Wherein, the size of external member at least one dimension that insulate is less than the size of sunk area in the dimension of correspondence.
Wherein, the external member that insulate is arranged in a tubular form.
Wherein, jet-stream wind producing element comprises the discharge electrode pin for the formation of charged powder particles further, 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 comprises diversion member further, and diversion member is used for directed spray air-flow around axis of movement helically formula motion.
Pass through technique scheme, the beneficial effect that the utility model embodiment produces is: design electrostatic powder spraying device comprises shapes electric field element, by shapes electric field element, shaping is carried out to the electrostatic field of force that electric field producing element generates, not only make dusty spray can be charged to ensure enough directed forces, and the electrostatic field of force that can reduce between shapes electric field element and element to be sprayed, thus reduce the faraday cup electrostatic screening effect of electrostatic force around the sunk area of element to be sprayed, what produce because of faraday cup electrostatic screening effect around solution sunk area does not go up powder problem, improve the upper powder degree of depth of element to be sprayed at sunk area.
Accompanying drawing explanation
Fig. 1 is the operating 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 utility model preferred embodiment;
Fig. 3 is the schematic cross-section of diversion member in electrostatic powder spraying device shown in Fig. 2;
Fig. 4 is the schematic diagram adopting electrostatic powder spraying device of the present utility model to solidify to form the preferred embodiment of coating on element to be sprayed;
Fig. 5 is the sectional view along element to be sprayed shown in Fig. 4 along A-A direction;
Fig. 6 is the sectional view along element to be sprayed shown in Fig. 4 along B-B direction;
Fig. 7 is the sectional view along element to be sprayed shown in Fig. 4 along C-C direction;
Fig. 8 is the sectional view along element to be sprayed shown in Fig. 4 along D-D direction;
Fig. 9-10 adopts the high-pressure electrostatic podwer gun of prior art at the enlarged diagram of the coating at position 4 place;
Figure 11-12 is the enlarged diagrams of the coating adopting the high-pressure electrostatic podwer gun of prior art to solidify to form at position 5 place;
Figure 13-14 is the enlarged diagrams of the coating adopting the high-pressure electrostatic podwer gun of prior art to solidify to form at position 14 place;
Figure 15 is the schematic flow sheet of the Electrostatic Spraying of powder Coatings coating method of the utility model preferred embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, embodiment described below the utility model is only a part of embodiment of the present utility model, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making other embodiments all obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Please again shown in composition graphs 1, in the process that high-pressure electrostatic dusts, the generation principle of the faraday cup electrostatic screening effect around sunk area is specific as follows:
Due to electronegative free ion can be produced when lance head discharges, make between lance head and element to be sprayed, to there is a cloud cluster be made up of charged powder particles and electronegative free ion, certain electric field certainly will be produced between this cloud cluster and element to be sprayed, usually be referred to as space charge field.Therefore, the electric field being close to the surface of element to be sprayed is made up of the electric field produced during lance head applying high-pressure electrostatic and space charge field in fact.The aerodynamic force common steering tape electro-powder particle deposition that these two electric fields and jet-stream wind provide to the surface of element to be sprayed, powder in realization.
When having the sunk areas such as deeply recessed or groove when the surface of element to be sprayed, the power line in the electrostatic field of force can focus on has minimum electric field resistance part, i.e. the surrounding (edge) of sunk area, 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, the inside that the inside that therefore power line can not enter sunk area causes charged powder particles to enter sunk area has 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, causes the deposit thickness of the edge's charged powder particles at sunk area obviously to increase, the effect that inevitably generation two is negative.One, because charged powder particles to be directed to the edge of sunk area by electrostatic force, thus only has little charged powder particles to enter the inside of sunk area.Its two, the free ion produced due to electric discharge when lance head applies high-pressure electrostatic can be deposited on the edge of sunk area along power line, 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 higher aerodynamic force very easily makes charged powder particles not easily be deposited by the surface rebound of element to be sprayed, therefore enough strong electric field must be had to provide electric field force during spraying.But, faraday cup electrostatic screening effect around sunk area makes no matter to be the electric field that lance head electric discharge produces, or the space charge field that charged powder particles and free ion are formed all can not enter the inside of sunk area, therefore, it is possible to the unique power-assisted helping charged powder particles to enter the inside of sunk area is exactly--the electric field that " cloud cluster " that the charged powder particles transmitted by jet-stream wind in the inside of sunk area and free ion are formed produces.
Based on above-mentioned, it is not solve the unique difficult problem that sunk area cannot go up powder that the configuration in the known electrostatic field of force and power line are concentrated in the edge of sunk area, because if by spraying enough for a long time sunk area, when edge deposits certain thickness charged powder particles, other charged powder particles just can not deposit in this edge again, and unique place to go can only be just the inside entering sunk area.But, due to the cause of reverse ion, if the degree of depth of sunk area is comparatively large or width is less, the reverse ionization that its edge develops rapidly will the ion of generating strap positive charge, and try hard to be reduced carried charge by these ions through the marginal deposit of sunk area to inner charged powder particles, cause and be pushed to by jet-stream wind the electric field that " cloud cluster " that the charged powder particles of the inside of sunk area and free ion formed produce and cannot produce enough strong electrostatic force to overcome air turbulence and to make charged powder particles deposit.
Even if adopt secondary spraying, namely second time spraying is carried out after being heating and curing for the first time again, what can not solve that sunk area produces because of faraday cup electrostatic screening effect cannot go up powder problem, because the free ion that electric discharge produces has between lance head and element to be sprayed move fast, and its movement velocity is again far away higher than the movement velocity of charged powder particles, the electric charge of the coating of having solidified can be increased in rapidly when free ion moves to element to be sprayed surperficial, its reason is that the coating of solidification has larger dielectric constant than uncured coating, namely better insulating properties is had.Therefore, the electric charge taking element surface to be sprayed to by free ion cannot leak in earth-return circuit and go, and makes free ion increase electric charge in coating rapidly, thus causes back-ionization further, powder utilization is acutely declined.During practical application, the depth-to-width ratio of sunk area just can not make its evenly upper powder more than 5:1.
According to above-mentioned principle, for enabling powder on sunk area, needing solution three problems: the first, during spraying, avoiding the surface of lance head and element to be sprayed to produce the powerful electrostatic field of force, avoid producing faraday cup electrostatic screening effect at sunk area with this; The second, need to make dusty spray to bring high-pressure electrostatic, can drop if dusty spray does not bring high pressure negative electrical charge to be affected by gravity and can not deposit; 3rd, sunk area is semi-enclosed chamber that an air is all difficult to enter, and how dusty spray effectively can be directed to the inside of sunk area.
Accordingly, main purpose of the present utility model 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 the utility model one embodiment.Refer to shown in Fig. 2, electrostatic powder spraying device 20 can comprise jet-stream wind producing element 21, electric field producing element 22, shapes electric field element 23 and agent structure 25.Wherein:
Jet-stream wind producing element 21 is arranged in agent structure 25 inner chamber, electric field producing element 22 is arranged at the side of agent structure 25 near element 30 to be sprayed, and shapes electric field element 23 is set in the periphery of electric field producing element 22 and removably connects with agent structure 25.The preferred shapes electric field element 23 of the present embodiment is the insulation external member arranged in a tubular form, preferred insulation external member adopts the such as high impedance insulating materials such as PTFE (Polytetrafluoroethylene, Teflon, polytetrafluoroethylene (PTFE) or Teflon), pottery to make.
Jet-stream wind producing element 21 can comprise discharge electrode pin 211, and the discharge electrode pin 211 of jet-stream wind producing element 21 is arranged at the inside of this insulation external member, for the formation of charged powder particles.
On electrostatic powder spraying device 20 pairs of conveyings 40 transmit element to be sprayed 30 dust work time, agent structure 25 ground connection and holding part are connected high-pressure electrostatic, are imported dusty spray and compressed air, electric field producing element 22 can be used for connecting high-pressure electrostatic, and generates the electrostatic field of force between electric field producing element 22 and element to be sprayed 30.
Jet-stream wind producing element 21 can be used for dusty spray and compressed air ejection, during ejection, dusty spray negative electrical charge on the band of the electrostatic field of force forms charged powder particles, is mixed in compressed air and forms jet-stream wind and sprayed by jet-stream wind producing element 21.
Shapes electric field element 23 can be used for carrying out shaping to the electrostatic field of force between electric field producing 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 charged powder particles and make it be deposited on the sunk area 31 of element 30 to be sprayed.Specifically, in a dimension of the axis of movement A perpendicular to jet-stream wind, the Electric Field Distribution region in the electrostatic field of force after shapes electric field element 23 shaping is less than the Electric Field Distribution region in the electrostatic field of force without shapes electric field element 23 shaping.
In the present embodiment, the axis of movement A of preferred 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 insulation external member shape is set, can in multiple dimensions of the axis of movement A perpendicular to jet-stream wind, the Electric Field Distribution region in the electrostatic field of force after shapes electric field element 23 shaping is less than the Electric Field Distribution region in the electrostatic field of force without shapes electric field element 23 shaping, and wherein multiple dimension 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 the dimension (Y-axis) of correspondence, and the width of the external member that such as insulate is less than the width of sunk area 31.Further, the free end (one end towards 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, thus jet-stream wind can be directed to the inside of sunk area 31.
The present embodiment can 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 that directly can put in the inside of sunk area 31, the various shape such as to twitch one's mouth, its objective is and charged powder particles can be delivered directly to the inside of sunk area 31 to complete even application, thus solve above-mentioned 3rd problem, even if sunk area 31 is semi-enclosed chambeies that an air is all difficult to enter, 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 due to shapes electric field element 23 (insulation external member) be according to the profile of electrostatic powder spraying device 20 make one isolation overcoat, utilize its insulation characterisitic to isolate the powerful electrostatic field of force produced between electric field producing element 22 and element to be sprayed 30, thus around depressed area 31 (edge) can be avoided to produce faraday cup electrostatic screening effect.
And, owing to electric field producing element 22 and discharge electrode pin 211 thereof to be arranged at the inside of insulation external member, be equivalent to change outer electric discharge into internal discharge mode, above-mentioned Second Problem can be solved and make high-pressure electrostatic on dusty spray band, above-mentioned first problem can be solved again, namely avoid producing between electric field producing element 22 and element to be sprayed 30 because discharge electrode pin 211 discharges the high-pressure electrostatic field of force produced, thus dusty spray effectively can be directed to the inside of sunk area 31, improve the upper powder degree of depth at sunk area 31, when practical application, electrostatic powder spraying device 20 can reach 10:1 and above sunk area 31 to depth-to-width ratio and carries out powder evenly.
Please again consult shown in Fig. 3, electrostatic powder spraying device 20 can further include diversion member 24, may be used for reducing jet-stream wind flow velocity.Further, preferred diversion member 24 is arranged at the inwall of the first area D1 of insulation external member, and 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 example, the preferred diversion member of the present embodiment 24 be sped structure and with insulation external member one-body molded, screw type diversion member 24 for directed spray air-flow around axis of movement helically formula motion, the flow velocity of jet-stream wind is slowed down with this, reduce the bounce-back of charged powder particles in the inside of sunk area 31, be not limited only to the bottom of sunk area 31 and be held on the sidewall of bottom, thus increasing the deposition of charged powder particles in the inside of sunk area 31, promoting 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 carry out other settings, the first area D1 of the external member that such as insulate only can 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 the flow velocity of jet-stream wind can be slowed down, 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, be " radiation tooth " as shown in Figure 4 for element 30 to be sprayed, and use the spray coating operations that the electrostatic powder spraying device 20 of the present embodiment and high-pressure electrostatic podwer gun 10 of the prior art all carry out about 3.5 minutes respectively, after powder curing, by the coating layer thickness of the 1 ~ position, mode measuring position 17 of film thickness gauge and section, the coating thickness data that the electrostatic powder spraying device 20 that data in following table 1 provide for employing the present embodiment obtains, data in following table 2 are the coating thickness data adopting 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 solidify to form at position 1 place after the electrostatic powder spraying device 20 adopting the present embodiment to provide dusts is 172 ~ 177 microns, the coating layer thickness that position 2 place solidify to form is 116 ~ 126 microns, the coating layer thickness that position 3 place solidify to form is 170 ~ 189 microns, and the coating layer thickness that position 4 place solidify to form is 187 ~ 225 microns.Reference table 2, when adopting the high-pressure electrostatic podwer gun 10 of prior art, the coating layer thickness solidify to form at position 1 place is 129 ~ 157 microns, the coating layer thickness that position 2 place solidify to form is 90 ~ 114 microns, the coating layer thickness that position 3 place solidify to form is 161 ~ 185 microns, and the coating layer thickness that position 4 place 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 solidify to form at position 5 place after the electrostatic powder spraying device 20 adopting the present embodiment to provide dusts is 93 ~ 165 microns, the coating layer thickness that position 6 place solidify to form is 104 ~ 118 microns, the coating layer thickness that position 7 place solidify to form is 108 ~ 127 microns, and the coating layer thickness that position 8 place solidify to form is 129 ~ 148 microns.Reference table 2, when adopting the high-pressure electrostatic podwer gun 10 of prior art, it is 8 ~ 65 microns at the coating layer thickness at position 5 place of solidifying to form, the coating layer thickness that position 6 place solidify to form is 18 ~ 52 microns, the coating layer thickness that position 7 place solidify to form is 80 ~ 92 microns, and the coating layer thickness that position 8 place 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 solidify to form at position 9 place after the electrostatic powder spraying device 20 adopting the present embodiment to provide dusts is 104 ~ 131 microns, the coating layer thickness that position 10 place solidify to form is 154 ~ 201 microns, the coating layer thickness that position 11 place solidify to form is 89 ~ 95 microns, and the coating layer thickness that position 12 place solidify to form is 159 ~ 170 microns.Reference table 2, when adopting the high-pressure electrostatic podwer gun 10 of prior art, the coating layer thickness solidify to form at position 9 place is 119 ~ 122 microns, the coating layer thickness that position 10 place solidify to form is 113 ~ 117 microns, the coating layer thickness that position 11 place solidify to form is 76 ~ 93 microns, and the coating layer thickness that position 12 place 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 solidify to form at position 13 place after the electrostatic powder spraying device 20 adopting the present embodiment to provide dusts is 248 ~ 253 microns, the coating layer thickness that position 14 place solidify to form is 206 ~ 262 microns, the coating layer thickness that position 15 place solidify to form is 154 ~ 208 microns, the coating layer thickness that position 16 place 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, when adopting the high-pressure electrostatic podwer gun 10 of prior art, the coating layer thickness solidify to form at position 13 place is 200 ~ 217 microns, the coating layer thickness that position 14 place solidify to form is 16 ~ 58 microns, the coating layer thickness that position 15 place solidify to form is 110 ~ 150 microns, the coating layer thickness that position 16 place solidify to form is 109 ~ 130 microns, the coating layer thickness that point 17 places solidify to form is 133 ~ 152 microns.
Known from the Data Comparison table 1 and table 2, in position 4, position 5, position 6 and position 14, the coating layer thickness solidify to form when adopting electrostatic powder spraying device 20 pairs of sunk areas 31 of the utility model embodiment to carry out upper powder, is far longer than the coating layer thickness solidify to form at sunk area 31 when adopting the high-pressure electrostatic podwer gun 10 of prior art.And the degree of depth of sunk area 31 is larger, adopt the coating layer thickness solidify to form during the high-pressure electrostatic podwer gun 10 of prior art less, and the coating layer thickness that the utility model embodiment solidify to form at sunk area 31 (position 4 and position 17 place) still can meet generation standard 80 ~ 140 microns.
Shown in Fig. 9-14 is the micro-enlarged drawing of section of the coating of dusting formed in 4,5,14 positions when adopting the high-pressure electrostatic podwer gun 10 of prior art, multiplication factor is 100 times, as can be seen from Fig. 9-14 and table 1,2 Data Comparison, the coating layer thickness solidify to form when adopting electrostatic powder spraying device 20 pairs of sunk areas 31 of the utility model embodiment to carry out upper powder, more more even than the coating layer thickness solidify to form at sunk area 31 when adopting the high-pressure electrostatic podwer gun 10 of prior art far away.
The utility model embodiment 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 the electrostatic field of force between electric field producing element and element to be sprayed.
Step S42: utilize shapes electric field element to carry out shaping to the electrostatic field of force.
Step S43: utilize the electrostatic 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 that the electrostatic field of force after shapes electric field component shaping produces around the sunk area of element to be sprayed is less than the faraday cup electrostatic screening effect that the electrostatic field of force without shapes electric field component shaping produces around the sunk area of element to be sprayed.
Specifically, discharge electrode pin is utilized 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 electrostatic field of force after shapes electric field component shaping is less than the Electric Field Distribution region in the electrostatic field of force without shapes electric field component 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 the insulation external member being set in the periphery of electric field producing element to carry out shaping to the described electrostatic field of force, and insulation external member is arranged in a tubular form, discharge electrode pin is arranged at the inside of insulation external member.In addition, the size of external member at least one dimension that insulate is less than the size of sunk area in the dimension of correspondence.
Preferably, above-mentioned insulation external member can be utilized jet-stream wind to be directed to the inside of above-mentioned sunk area.
Further, the present embodiment preferably utilize diversion member for directed spray air-flow along axis of movement helically formula move, diversion member can be sped structure and with insulation external member one-body molded, for directed spray air-flow around axis of movement helically formula motion, 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.
The Electrostatic Spraying of powder Coatings coating method of the present embodiment, based on electrostatic powder spraying device 20 embodiment illustrated in fig. 2, the detailed process of its spraying repeats no more herein.
Again illustrate; the foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model description and accompanying drawing content to do equivalent structure or equivalent flow process conversion; such as the be combineding with each other of technical characteristic 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 utility model.
Claims (8)
1. an electrostatic powder spraying device, is characterized in that, described electrostatic powder spraying device comprises:
Jet-stream wind producing element, for generating the jet-stream wind carrying charged powder particles;
Electric field producing element, for generating the electrostatic field of force for guiding described charged powder particles between described electric field producing element and element to be sprayed;
Shapes electric field element, for carrying out shaping to the described electrostatic 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 shapes electric field element is the insulation external member of the periphery being set in described electric field producing 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 electrostatic field of force after described shapes electric field component shaping is less than the Electric Field Distribution region in the described electrostatic field of force without described shapes electric field component shaping.
4. electrostatic powder spraying device according to claim 3, is characterized in that, the size of described insulation external member at least one dimension described 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 is arranged in a tubular form.
6. electrostatic powder spraying device according to claim 2, is characterized in that, described jet-stream wind producing element comprises the discharge electrode pin for the formation of described charged powder particles further, 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 comprises diversion member further, and described diversion member is for guiding described jet-stream wind around axis of movement helically formula motion.
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| CN201420429495.5U CN204208696U (en) | 2014-07-31 | 2014-07-31 | Electrostatic powder spraying device |
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| CN201420429495.5U CN204208696U (en) | 2014-07-31 | 2014-07-31 | Electrostatic powder spraying device |
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| CN204208696U true CN204208696U (en) | 2015-03-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162492A (en) * | 2014-07-31 | 2014-11-26 | 深圳市大富科技股份有限公司 | Electrostatic powder spraying device and spraying method thereof |
| CN109433568A (en) * | 2018-11-17 | 2019-03-08 | 耀保五金制品（东莞）有限公司 | Outdoor furniture stainless steel pipe automatic powder spraying technique |
-
2014
- 2014-07-31 CN CN201420429495.5U patent/CN204208696U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162492A (en) * | 2014-07-31 | 2014-11-26 | 深圳市大富科技股份有限公司 | Electrostatic powder spraying device and spraying method thereof |
| 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 |
| 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 |
| CN109433568A (en) * | 2018-11-17 | 2019-03-08 | 耀保五金制品（东莞）有限公司 | Outdoor furniture stainless steel pipe automatic powder spraying technique |
| CN109433568B (en) * | 2018-11-17 | 2022-06-07 | 耀保五金制品（东莞）有限公司 | Automatic powder spraying process for stainless steel pipe fitting of outdoor furniture |
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