CN106513193A - Electrostatic 3D printer and printing method thereof - Google Patents
Electrostatic 3D printer and printing method thereof Download PDFInfo
- Publication number
- CN106513193A CN106513193A CN201510563416.9A CN201510563416A CN106513193A CN 106513193 A CN106513193 A CN 106513193A CN 201510563416 A CN201510563416 A CN 201510563416A CN 106513193 A CN106513193 A CN 106513193A
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- China
- Prior art keywords
- electroconductive resin
- print platform
- electrostatic
- corona discharge
- light source
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
-
- 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
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/081—Plant for applying liquids or other fluent materials to objects specially adapted for treating particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
The invention discloses an electrostatic 3D printer and a printing method thereof. An electric field is formed between a corona discharge atomization nozzle and a printing platform; under the force effect of the electric field, sprayed electric conducting resin particles with electricity are operated to the printing platform, and are adsorbed on the surface of the printing platform to form a first electric conducting resin coating layer; then, the illumination curing is performed for an area corresponding to the first electric conducting resin coating layer through a projection light source; the electric conducting resin particles with electricity are formed to a second electric conducting resin coating layer on the first electric conducting resin coating layer; then, the illumination curing is performed for an area corresponding to the second electric conducting resin coating layer through the projection light source; and the operation is continuously repeated until the curing areas in all the electric conducting resin layers finally form an accumulated solid. An electrostatic spraying technology is combined with an SLA 3D printing technology to propose a brand new 3D printing technology. Compared with a traditional 3D printing mode, the electrostatic printing method can greatly improve the printing speed and precision.
Description
Technical field：
The present invention relates to 3D printer product and Method of printing technical field, refer in particular to a kind of electrostatic 3D printer and
Its Method of printing.
Background technology：
3D printer (abbreviation 3D printer) obtains development at full speed, existing 3D printer for several years at this
Firstly the need of being modeled using computer before work, " section " that then the 3D models for building up are layered
Process, then from bottom to top successively " print " per layer of section, so as to ultimately form and institute's established model identical
3D products.According to this principle, current 3D printing technique is main in the following ways, i.e. hot melt material spraying
Printing type.The principle of the printing type is similar with traditional ink-jet printer principle, except that, it is this
" ink " used by 3D printer be a kind of hot melt material, such as hot melt wax, PUR.By printing
Mechanism is sprayed on the hot melt material of melting on print platform, carries out " printing " successively, when hot melt material quilt
After spraying out, which rapidly will solidify." print " through constantly successively, required for ultimately forming
3D objects.
As shown in Figure 1, this is that at present a kind of hot melt material sprays 3D printer 8, and the printer 8 is beaten
Print 81 is arranged in a mounting seat 82, and mounting seat 82 is driven by a 3D mechanical arm 83
Realize the operation on X/Y/Z3D directions.It is provided with for carrying printing product relative to the lower section of printhead 81
The print platform 84 of product.As mechanical arm 83 drives successively the beating on print platform 84 of printhead 81
Print, is printed
The product for going out successively is printed from bottom to top, until completing.
As shown in Figure 2, this is that the printing type of another kind of 3D printer is, commonly referred to SLA, i.e. 3D light are solid
Change the method for forming.Being filled with container 92 can be by the resin 90 of photocuring, and being provided with one in container 92 can
" printing " platform 93 of lifting.Platform 93 drives the distance for moving down a unit every time by driving means 94
(apart from very little), will form the resin of a layer " exposure " on such platform 93.Then by being used for solidifying
Light source 91 be radiated on the resin of the layer " exposure ", by irradiation of the light beam to the resin designated area of " exposure ",
So as to make the solidification for forming corresponding pattern on the resin of " exposure ", ground floor solidification face 95 is defined.Then, put down
Platform 93 moves down the distance of a unit again, can shape again on ground floor solidification face 95 on such platform 93
Into the resin of a layer " exposure ".Then the resin of the layer " exposure " is radiated at by the light source 91 for solidification
On, by irradiation of the light beam to the resin designated area of " exposure ", formed on the resin of " exposure " so as to make
The solidification of corresponding pattern, defines second layer solidification face.So repeat, if being fully completed up to dried layer solidification face,
So as to define the entity of a solidification, " printing " of 3D entities is completed.Generally this 3D printer is adopted
With UV solidified resins and UV light sources.
The present inventor also once proposed a kind of 3D printer according to the principle of SLA printers, saw Chinese patent application
Number it is：201410563384.8 application for a patent for invention, the patent application disclose a kind of 3D products of making
Method and its device.Which utilizes the lighter principle of proportion of UV resins, should by water or other body fluid liftings
UV resins, are then solidified to the UV resins of the superiors using UV point sources, then are constantly added
Liquid, continuous lifting UV resins, and successively solidified.The present invention is by stereolithography apparatus method (SLA)
The advantage that printing type is sprayed with hot melt material is combined, and proposes a kind of manufacture method of new 3D products and dress
Put.
Although the more current hot melt material spraying 3D printer of the printing type of SLA has been greatly improved,
But which still suffers from certain deficiency.First, in precision aspect, at present the precision of all of 3D printer all with its
The precision of the height in per layer of solidification face is related, if the thickness in per layer of solidification face is less, the printing essence finally realized
Degree is higher.This printing precision depends primarily on the precision of motor, and the thickness that should be per layer of solidification face is by electricity
Machine drives what is realized, can thus produce due to the error of motor operation and caused printing error.In addition, existing
In the printing type using photocuring, which is required to the irradiation for the time carrying out by UV ultraviolet lights, to realize resin
Solidification, thus may require that the regular hour wait, cause the time-write interval of current 3D printer longer, nothing
Method realizes industrialization.
For the deficiency of current 3D printer, the present inventor is through constantly having researched and proposed the technical program.This skill
The mode of the maximum of art scheme is exactly to employ electrostatic means.Electrostatic is relatively wide used in sprayed on material at present, quiet
Electrospray is exactly one of which application.Electrostatic spraying is to make electronegative paint particles edge using high-pressure electrostatic electric field
The contrary direction directed movement of electric field, and paint particles are adsorbed into a kind of spraying method in surface of the work.This
Inventor is exactly that the technology of electrostatic spraying is incorporated in 3D printing, so as to propose a kind of brand-new 3D printing
Mode.
The content of the invention：First technical problem to be solved by this invention is that and overcomes existing for prior art not
Foot, there is provided
A kind of electrostatic 3D printer.For solving above-mentioned first technical problem, technical scheme below is present invention employs：
A kind of electrostatic 3D beats
Print machine includes：One projection light source, the projection light source is for carrying out photocuring to electroconductive resin；One print platform, should
Print platform is located at below projection light source；One corona discharge atomizer, the corona atomizer and a high pressure
Generator connects；One is used for storing the container of electroconductive resin, the outlet of the container and described corona discharge atomization spray
Mouth is turned on, and electroconductive resin is sprayed by corona discharge atomizer under external pressure effect, while the conductive tree for spraying
Fat charge particles lotus；Described print platform ground connection, or the opposite polarity electricity with electroconductive resin charge particles lotus
Source connects, and to make and form electric field between corona discharge atomizer and print platform, is put by corona
The electroconductive resin microgranule that electrospray nozzles spray flies to the surface of print platform under electric field force effect, and is adsorbed
On print platform surface, then the electroconductive resin coating by projection light source to absorption on print platform surface is specified
Region carry out photocuring.
Furthermore, in above-mentioned technical proposal, described electrostatic 3D printer also includes circular conductive side
Space between described print platform and corona discharge atomizer is enclosed by conductive side wall and is set by wall, and
The electric polarity of conductive side wall is identical with the polarity of electroconductive resin charge particles lotus.
Furthermore, in above-mentioned technical proposal, electroconductive resin and and electroconductive resin in described container, have been filled with
Immiscible dielectric, described dielectric are located at the upper strata of electroconductive resin, and external pressure source is acted on absolutely
On edge medium, external pressure is applied on electroconductive resin by dielectric, makes electroconductive resin going out by container
Mouth is discharged to corona discharge atomizer.
Furthermore, in above-mentioned technical proposal, described conductive side wall relative position is respectively arranged with infrared ray
Emitter and infrared receiver.
Furthermore, in above-mentioned technical proposal, the periphery of described print platform surround and forms a groove, passes through
Groove is to being reclaimed by the electroconductive resin flowed down on print platform.
Furthermore, in above-mentioned technical proposal, described projection light source adopts ultraviolet light source, described conduction
Electroconductive resin of the resin using ultraviolet light polymerization；The high voltage that described high tension generator is produced is 60-120KV.
Second technical problem to be solved by this invention is that and provides a kind of printing of electrostatic 3D printer
Method.
For solving above-mentioned second technical problem, the technical solution used in the present invention is：The electrostatic 3D printer
Method of printing is:An electric field, i.e. corona discharge mist is formed between corona discharge atomizer and print platform
Change and there is voltage difference or the electric polarity of the two conversely, so as to make by corona discharge mist between nozzle and print platform
Change the powered electroconductive resin granule of nozzle ejection under electric field force effect, run to print platform, and be attracted to
The surface of print platform, forms ground floor electroconductive resin coating, then conductive to the ground floor by projection light source
The corresponding region of resinous coat carries out illumination curing, and then powered electroconductive resin granule is again in the conductive tree of ground floor
Second layer electroconductive resin coating is formed in fat coating, and the second layer electroconductive resin is applied again by projection light source
The corresponding region of layer carries out illumination curing, so constantly repeats, the curing area in last each layer conductive resin layer
Domain forms the entity of a stacking.
Furthermore, in above-mentioned technical proposal, the electrostatic 3D printer Method of printing specifically includes following step
Suddenly：The first step, loads positive high voltage or negative high voltage on corona discharge atomizer, for storing electroconductive resin appearance
The outlet of device is turned on corona discharge atomizer, and electroconductive resin is atomized by corona discharge under external pressure effect
Nozzle sprays, at the same spray electroconductive resin microgranule is positively charged or negative charge；Second step, will be positioned at projection
Print platform below light source is grounded or connects the loading voltage contrary with corona discharge atomizer electrode, order electricity
Electric field is formed between corona atomizer and print platform, and the electroconductive resin that corona discharge atomizer sprays is micro-
Grain is moved to print platform in the presence of electric field force, and is adsorbed on the surface of print platform, is formed ground floor and is led
Electric resinous coat；3rd step, is made first on its projected light line focal length and print platform by mobile projector light source
The distance correspondence of layer electroconductive resin coating, by projection light source to the corresponding region of ground floor electroconductive resin coating
Illumination curing is carried out, the region for being projected light source irradiation in the ground floor electroconductive resin coating forms the solidification of crosslinking
Unit, uncured region remain stuck to the surface of print platform；4th step, is sprayed by corona discharge atomizer
The electroconductive resin microgranule for going out is covered in ground floor electroconductive resin coating again, forms second layer electroconductive resin coating,
The focal length of projection light source is adjusted again, and the corresponding region to the second layer electroconductive resin coating carries out illumination curing,
Consolidation zone in the second layer electroconductive resin coating by simultaneously with ground floor electroconductive resin coating on curing area
Domain solidifies；5th step, the above-mentioned 4th step operation of repetition, the consolidation zone in last each layer conductive resin layer are formed
The entity of one stacking, removes the entity, and uncured electroconductive resin will be flowing down automatically, and the entity separation,
Obtain the 3D entities for printing.
Furthermore, in above-mentioned technical proposal, in the described first step, in described print platform and corona
Space between discharging atomizing nozzle is enclosed and sets a conductive side wall, and the electric polarity and electroconductive resin of conductive side wall
The polarity of charge particles lotus is identical, the electric field repulsion power formed by conductive side wall, makes the electroconductive resin microgranule will not
It is attached on conductive side wall, and accelerates to print platform to move.
Furthermore, in above-mentioned technical proposal, in the described first step, in the container, conduction not only it has been filled with
Resin, and also be filled with the dielectric immiscible with electroconductive resin, by dielectric by electroconductive resin with
Outside pressure source isolation, prevents high-tension current from outwards conducting by electroconductive resin；External pressure source is acted on absolutely
On edge medium, external pressure is applied on electroconductive resin by dielectric, makes electroconductive resin going out by container
Mouth is discharged to corona discharge atomizer.
After the above-mentioned technical proposal that the present invention is adopted, which is by the technology of electrostatic spraying and SLA3D printing technique phases
With reference to, it is proposed that a kind of brand-new 3D printing technique.Using the 3D printer of the printing technique using conductive
Resin is atomized to electroconductive resin by high voltage power supply and charging electric charge, by electricity as the raw material for printing
Field force makes the microgranule of electroconductive resin to print platform displacement, and adsorbs on print platform, forms electroconductive resin
Coating, recycles reprojection light source to carry out illumination curing to the corresponding region of electroconductive resin coating, finally makes successively
Complete cured layer formed one stacking entity, obtain print 3D entities.The present invention adopts above-mentioned technology
After scheme, relative to current traditional 3D printing technique, the print speed of the present invention is very fast, by electric field force
The direct displacement of electroconductive resin is made to print platform, so as to complete to print the stacking of solid material layer, meanwhile,
In the technical solution adopted in the present invention, when illumination curing is carried out to the corresponding region of electroconductive resin coating, need not
Wait consolidation zone to be fully cured, there is electrostatic adsorption by between electroconductive resin microgranule, hardening time can be reduced,
And electroconductive resin coating is very thin, its hardening time is very short.Finally, the present invention is due in the mistake for successively stacking
Cheng Zhong, the thickness of every layer of electroconductive resin coating are suitable with the diameter of electroconductive resin microgranule, and its thickness is very little, relatively
In current 3D printing method, its precision can be greatly improved, and be not in
Because the interference that motor error is formed, it is ensured that the precision of printed product.
Description of the drawings：
Fig. 1 is the structural representation of existing a 3D printer；
Fig. 2 is the structural representation of existing SLA 3D printers；
Fig. 3 is the structural representation of the embodiment of the present invention；
Fig. 4 is the schematic diagram of electroconductive resin microgranule operation in the embodiment of the present invention；
Fig. 5 is the structural representation of container in the embodiment of the present invention；
Fig. 6 is the schematic diagram that the embodiment of the present invention forms electroconductive resin coating on print platform；
Fig. 7 is the operating diagram of embodiment of the present invention middle infrared (Mid-IR) emitter and infrared receiver.
Specific embodiment：
With reference to specific embodiments and the drawings, the present invention is further described.
As shown in Fig. 3-7, this is the specific embodiment of the present invention, and the present invention is that to employ electrostatic spraying corresponding
Principle realizes a kind of brand-new 3D printing technique, and the electrostatic 3D printer Method of printing is:In corona discharge mist
Change, i.e., corona discharge atomizer 3 is put down with printing
There is voltage difference or the electric polarity of the two between platform 2 conversely, being sprayed by corona discharge atomizer 3 so as to make
Powered electroconductive resin granule 40 electric field force effect under, run to print platform 2, and be attracted to printing
The surface of platform 2, forms ground floor electroconductive resin coating 41, then by 1 pair of ground floor of projection light source
41 corresponding region of electroconductive resin coating carries out illumination curing, and then powered electroconductive resin granule 40 is again
Second layer electroconductive resin coating 42 is formed in one layer of electroconductive resin coating 41, and again by projection light source 1
Illumination curing is carried out to the 42 corresponding region of second layer electroconductive resin coating, is so constantly repeated, finally
Consolidation zone in each layer conductive resin layer forms the entity of a stacking.
Specifically, the electrostatic 3D printer of the embodiment at least includes：
One projection light source 1, the projection light source 1 can produce UV ultraviolet sources, by the ultraviolet source to leading
Electricity
Resin 4 carries out photocuring irradiation.Projection light source 1 is connected in a drive mechanism 11 being vertically movable,
Projection light source 1 is driven to move up and down by drive mechanism 11, so as to adjust the focal length of projection light source 1, order
Its focal length is corresponding with the conductive resin layer in the upper surface of print platform 2.
One print platform 2, the print platform 2 have the plane of a conduction, and print platform 2 is located at projection light source
1 lower section.And negative voltage is loaded on plane 2 is printed or is grounded plane 2 is printed.Described printing
The periphery of platform 2 around a groove 20 is formed or print platform 2 is arranged with pallet, by groove 20
Or pallet is to being reclaimed by the electroconductive resin 4 flowed down on print platform 2.The electroconductive resin 4 of recovery can be with
Reuse, so as to improve the utilization rate of electroconductive resin 4, reduce the loss of raw material.
One corona discharge atomizer 3, the corona discharge atomizer 3 are located at projection light source 1 and print platform
Between 2.Corona discharge atomizer 3 is connected with high tension generator 30, so as to make corona discharge atomizer 3
Loading high pressure positive voltage, the positive voltage loaded in the present embodiment are 30KV.So when electroconductive resin 4 is by electricity
After corona atomizer 3 sprays, the electroconductive resin microgranule 40 of ejection will carry positive charge.In order to produce
Uniform jeting effect, the corona discharge atomizer 3 are annular in shape, and the bottom surface of its ring-type uniformly offers some
Outlet, electroconductive resin 4 external pressure effect under from outlet spray.Simultaneously because the electroconductive resin for spraying is micro-
Grain 40 carries positive charge, and under the effect of repelling each other of electric field force, electroconductive resin microgranule 40 will be further thin
Change, as shown in Figure 4.Electroconductive resin 4 can be atomized by corona discharge atomizer 3, and make atomization
The electroconductive resin microgranule of formation is positively charged.
The bulk of described electroconductive resin 4 is adopted can be by the liquid resin of ultraviolet light polymerization.In order to make
The resin is electrically conductive, can add a certain amount of conductive material wherein, for example, add a certain proportion of carbon nanometer
Tube material.
Described electroconductive resin 4 is stored in container 5, the outlet of the container 5 and described corona discharge mist
Change
Nozzle 3 is turned on, and container 5 is connected with an external pressurized device.Electroconductive resin 4 external pressure effect under by
Hold
Device 5 is entered in corona discharge atomizer 3, and is sprayed by corona discharge atomizer 3, while spray
Electroconductive resin microgranule 40 is electrically charged.As electroconductive resin 4 has conductive characteristic, which will directly by high pressure fax
It is directed in container 5, in order to prevent high voltage arc situation from occurring, and while prevents high-tension electricity from causing to external staff
Unexpected injury, it is necessary to carry out being dielectrically separated from process, embodiments of the invention to the electroconductive resin 4 in the container 5
In the following way.
It is shown in Figure 5, electroconductive resin 4 and immiscible with electroconductive resin 4 is filled with the container 5
Dielectric 50, described 50 proportion of dielectric are less than electroconductive resin, so as to float over the upper of electroconductive resin 4
Layer, such external pressure source are acted on dielectric 50, are acted on external pressure by dielectric 50
To on electroconductive resin 4, electroconductive resin 4 is made to be discharged from the outlet of container 5 to corona discharge atomizer 3.
Dielectric
50 using the resin material for insulating, and outside pressure source can be by way of hydraulic pressure or air pressure by pressure conduction
To dielectric 50.In addition, container 5 is clamped by the clip 51 by an insulation, even if so holding
Electroconductive resin in device 5 is connected with high voltage, and which also outwards will not conduct, so as to ensure to occur sparking or
The danger that person operator get an electric shock.
Shown in Figure 3, the electrostatic 3D printer also includes circular conductive side wall 6, by conductive side wall 6
Space between described print platform 2 and corona discharge atomizer 3 is enclosed and is set, and conductive side wall 6
Electric polarity it is identical with 40 charged polarity of electroconductive resin microgranule.In the present embodiment, conductive side wall 6 is loaded with
The positive voltage of 5KV.So after electroconductive resin 4 is sprayed from corona discharge atomizer 3, due to electroconductive resin
Microgranule
40 carry positive charge, under the effect of repelling each other of electric field force, will be by conductive side wall to electroconductive resin microgranule 40
The effect of repelling each other of 6 electric field forces, it is impossible to run to 6 surface of conductive side wall, so that prevent electroconductive resin microgranule 40
Splash without purpose, effectively reduce the loss of electroconductive resin 4.
Shown in Figure 3, described 6 relative position of conductive side wall is respectively arranged with RF transmitter 71
With
Infrared receiver 72.Described RF transmitter 71, infrared receiver 72 are in corresponding vertical strip.
Print platform 2 may determine that by the infrared induction of the RF transmitter 71 and infrared receiver 72
The physical height of upper stacking, will be expanded on further behind specific works mode.
With reference to described above, the electrostatic 3D printer Method of printing of the present invention specifically includes following steps：First
Step, loads the positive high voltage of 30KV, on corona discharge atomizer 3 for storing electroconductive resin
The outlet of 4 containers 5 is turned on corona discharge atomizer 3, electroconductive resin 4 external pressure effect under by
Corona discharge atomizer 3 sprays, while the electroconductive resin microgranule 40 for spraying is positively charged.
Print platform 2 below projection light source 1 is grounded or is connect loading negative voltage, order electricity by second step
Electric field is formed between corona atomizer 3 and print platform 2, and what corona discharge atomizer 3 sprayed leads
Electric resin particle 40 is moved to print platform in the presence of electric field force, and adsorbs the table in print platform 2
Face, forms ground floor electroconductive resin coating 41；
3rd step, makes its projected light line focal length lead with ground floor on print platform 2 by mobile projector light source 1
The distance correspondence of electric resinous coat 41, by 1 pair of 41 correspondence of ground floor electroconductive resin coating of projection light source
Region carry out illumination curing, be projected in the ground floor electroconductive resin coating 41 light source irradiation region formed
The solidified cell 410 of crosslinking, uncured region remains stuck to the surface of print platform 2；
4th step, is covered in ground floor again by the electroconductive resin microgranule 40 that corona discharge atomizer 3 sprays
In electroconductive resin coating 41, second layer electroconductive resin coating 42 is formed, adjusts the focal length of projection light source 1 again,
And the corresponding region to the second layer electroconductive resin coating 42 carries out illumination curing, the second layer electroconductive resin is applied
Consolidation zone 420 on layer 42 will be solidified with the consolidation zone 410 in ground floor electroconductive resin coating 41 simultaneously；
5th step, the above-mentioned 4th step operation of repetition, the consolidation zone in last each layer conductive resin layer form one
The entity of stacking, removes the entity, and uncured electroconductive resin will flowed down automatically, and with the entity separation, obtained
The 3D entities of printing.
Shown in Figure 6, the process of the stacking of electroconductive resin microgranule 40 is as follows:
First, the electroconductive resin microgranule 40 that corona discharge atomizer 3 sprays is in the presence of electric field force to beating
Print platform 2 is moved, and as electroconductive resin microgranule 40 is positively charged, which is easy to be attracted to negatively charged pressure
2 surface of print platform.After electroconductive resin microgranule 40 is adsorbed onto the surface of print platform 2, its positive charge
It is lost in, the electroconductive resin microgranule 40 will become the corresponding negative voltage with print platform 2.It is follow-up still to
The positively charged electroconductive resin microgranule 40 of the movement of print platform 2 will be also not conductive to print platform 2
Resin particle
The 40 region movements for covering, because comparatively, the region that these are not covered by electroconductive resin microgranule 40 is relative
Potential is higher, and electric field force is bigger.Until the surface of print platform 2 is all covered by electroconductive resin microgranule 40,
Form ground floor electroconductive resin coating 41.
Then, its projected light line focal length is made to apply with electroconductive resin on print platform 2 by mobile projector light source 1
The distance correspondence of layer 41, is entered by 1 pair of 41 corresponding region of ground floor electroconductive resin coating of projection light source
Row illumination curing, the region for being projected light source irradiation in the ground floor electroconductive resin coating 41 form consolidating for crosslinking
Change unit 410, uncured region remains stuck to the surface of print platform 2.
Then, subsequently will be flat to printing in the positively charged electroconductive resin microgranule 40 moved to print platform 2
2 ground floor electroconductive resin coating 41 of platform is moved, and forms the second layer on 41 surface of ground floor electroconductive resin coating
Electroconductive resin coating 42.
Finally, light is carried out again by the corresponding region of 1 pair of second layer electroconductive resin coating 42 of projection light source
According to solidification, the consolidation zone 420 in the second layer electroconductive resin coating 42 will simultaneously with ground floor electroconductive resin
Consolidation zone 410 in coating 41 solidifies.So it is repeated up to stack the printing entity needed for completing.
Shown in Figure 7, described 6 relative position of conductive side wall is respectively arranged with 71 He of RF transmitter
Infrared receiver 72.Can by the infrared induction of the RF transmitter 71 and infrared receiver 72
With the physical height for judging to stack on print platform 2.When electroconductive resin coating has not yet been formed on print platform 2,
All Infrared that RF transmitter 71 sends can be received by infrared receiver 72, i.e., infrared
Line
There is no any stop between emitter 71 and infrared receiver 72.With the carrying out for printing, printing
Electroconductive resin coating will be gradually formed on platform 2, and with the gradually stacking of electroconductive resin coating, which will be to red
Infrared ray that outside line emitter 71 sends produces stop, cause infrared receiver 72 cannot receiving portion it is infrared
Line signal.As shown in fig. 7, now as the entity 400 for gradually stacking formation of electroconductive resin coating is present,
The infrared ray sent below RF transmitter 71 is blocked, and it is red that infrared receiver 72 cannot receive the part
Outside line signal, by the analysis to signal, it is possible to calculate the height H of entity 400.If infrared emitting
The precision of device 71 and infrared receiver 72 is sufficiently high, it might even be possible to measure each layer of electroconductive resin coating
Thickness.It is known that the principle of current 3D printer is exactly to be modeled using computer, then will build
Into 3D models " section " for being layered process, then from bottom to top successively " print " per layer of section, so as to
Ultimately form and institute's established model identical 3D product.When per layer section thickness it is sufficiently thin, the 3D entities of printing
Precision will be enough height.Current RF transmitter 71 and infrared receiver 72 can be gone out with surface sweeping
The thickness of one layer of electroconductive resin coating, numerical value can be as accurate as 0.01-0.05 millimeters, with respect to current
3D printer, the printed 3D solid precision of the present invention can be greatly promoted.Simultaneously as can pass through infrared
Line emitter 71 and infrared receiver 72 measure the height of entity 400, according to this numerical value, it is possible to
Control drive mechanism 11, adjusts the focal length of projection light source 1, makes the focal length of its radiation source with entity 400 most
The electroconductive resin coating correspondence on upper strata, completes curing operation.
In above-described embodiment, as 3 anelectrode of corona discharge atomizer of atomising device, high tension generator is connect
30 power supply positive high voltage, print platform 2 are grounded or connect negative voltage.So high pressure is just led at the two poles of the earth quiet
Electric field.Due to there is corona discharge in corona discharge atomizer 3, the electroconductive resin microgranule 40 of ejection can be made
It is powered, and be further atomized.Repel each other in accordance with the same sex, the principle that there is a natural attraction between the sexes, powered electroconductive resin microgranule
40, by the presence of electric field force, will move to print platform 2, and be coated in the surface of print platform 2,
Heap
Accumulate into one layer of average, electroconductive resin coating of adhesion-tight.High tension generator 30 produce voltage can be
30-120KV.2 voltage of print platform is 0 or is negative voltage.Certainly, as atomising device in the present invention
Corona discharge atomizer 3 can also connect the negative electrode of high pressure, and print platform 2 is grounded or connects positive voltage, together
When, the critical voltage of negative polarity corona discharge is low compared with positive polarity corona discharge and relatively stable, be difficult to breed generation
Spark, its safe effect can be more preferable.
The present invention's sprays printing type relative to current SLA printing types and hot melt material, and which not only has
There is speed fast, a little, and which has material loss low to high precision, and unnecessary raw material can be reclaimed and be reused.
In addition, present invention has an advantage that, which directly can realize 3D printing effect on three-dimensional object.Will
Three-dimensional body realizes the accumulation of electroconductive resin microgranule on three-dimensional objects as print platform, then by solidification
The selection in region is selected to the electroconductive resin coating piled up, and can thus realize 3D on three-dimensional objects
Printing effect.This technology is may apply in the material parcel technique such as coating of jewelry, jewelry, can with and
It is applied in the parcel coating of hollow out object, these are that current 3D printer cannot be realized.
Certainly, the specific embodiment of the present invention is the foregoing is only, it is not limiting the scope of the present invention, all
The equivalence changes done according to construction, feature and principle described in scope of the present invention patent or modification, all should be included in
In scope of the present invention patent.
Claims (10)
1. a kind of electrostatic 3D printer, it is characterised in that：The electrostatic 3D printer includes：One projected light
Source (1), the projection light source (1) is for carrying out photocuring to electroconductive resin (4)；One print platform (2),
The print platform (2), below projection light source (1)；One corona discharge atomizer (3), the point are swooned
Discharging atomizing nozzle (3) and a high tension generator (30)
Connection；One is used for storing the container (5) of electroconductive resin (4), and the outlet and described corona of the container (5) are put
Electrospray nozzles (3) are turned on, and electroconductive resin (4) is sprayed by corona discharge atomizer (3) under external pressure effect,
The electroconductive resin microgranule (40) for spraying simultaneously is electrically charged；
Described print platform (2) ground connection, or with the charged opposite polarity electricity of electroconductive resin microgranule (40)
Source connects, and to make and form electric field between corona discharge atomizer (3) and print platform (2), is put by corona
The electroconductive resin microgranule (40) that electrospray nozzles (3) spray electric field force effect under to print platform (2) surface
It is mobile, and print platform (2) surface is attracted to, then by projection light source (1) to adsorbing in print platform
(2) the electroconductive resin coating designated area on surface carries out photocuring.
2. a kind of electrostatic 3D printer according to claim 1, it is characterised in that：Electrostatic 3D
Printer also includes：Circular conductive side wall (6), by conductive side wall (6) by described print platform (2)
And the space between corona discharge atomizer (3) is enclosed and is set, and the electric polarity of conductive side wall (6) and conductive tree
The charged polarity of fat microgranule (40) is identical.
3. a kind of electrostatic 3D printer according to claim 1, it is characterised in that：In container (5)
Electroconductive resin (4) and the dielectric (50) immiscible with electroconductive resin (4) is filled with, described insulation is situated between
Matter (50) is located at the upper strata of electroconductive resin (4), and external pressure source is acted on dielectric (50), passed through
Dielectric (50) is applied to external pressure on electroconductive resin (4), makes electroconductive resin (4) by holding
The outlet of device (5) is discharged to corona discharge atomizer (3).
4. a kind of electrostatic 3D printer according to claim 2, it is characterised in that：Described conduction
Side wall (6) relative position is respectively arranged with RF transmitter (71) and infrared receiver (72).
5. a kind of electrostatic 3D printer according to any one in claim 1-4, it is characterised in that：
The periphery of described print platform (2) surround and forms a groove (20), by groove (20) to by print platform
(2) electroconductive resin (4) flowed down on is reclaimed.
6. a kind of electrostatic 3D printer according to any one in claim 1-4, it is characterised in that：
Projection light source (1) adopts ultraviolet light source, described electroconductive resin (4) to set using the conductive of ultraviolet light polymerization
Fat；The high voltage that described high tension generator (30) is produced is 30-120KV.
7. a kind of Method of printing of electrostatic 3D printer, it is characterised in that：The electrostatic 3D printer is printed
Method is:An electric field force, i.e. electricity is formed between corona discharge atomizer (3) and print platform (2)
There is voltage difference or the electric polarity of the two between corona atomizer (3) and print platform (2) conversely,
So as to make powered electroconductive resin granule (40) that sprayed by corona discharge atomizer (3) under electric field force effect,
Run to print platform (2), and be attracted to the surface of print platform (2), form ground floor electroconductive resin and apply
Layer (41), then carries out illumination by projection light source (1) solid to the corresponding region of electroconductive resin coating (41)
Change, then powered electroconductive resin granule (40) form second again on ground floor electroconductive resin coating (41)
Layer electroconductive resin coating (42), and again by projection light source (1) to the second layer electroconductive resin coating
(42) corresponding region carries out illumination curing, so constantly repeats, consolidating in last each layer conductive resin layer
Change the entity that region forms a stacking.
8. the Method of printing of a kind of electrostatic 3D printer according to claim 7, it is characterised in that：
The electrostatic 3D printer Method of printing specifically includes following steps：
The first step, loads positive high voltage or negative high voltage on corona discharge atomizer (3), leads for storage
The outlet of electric resin (4) container (5) is turned on corona discharge atomizer (3), and electroconductive resin (4) exists
Sprayed by corona discharge atomizer (3) under external pressure effect, while the electroconductive resin microgranule (40) for spraying
Positively charged or negative charge；Second step, the print platform (2) below projection light source (1) is grounded
Or connect loading and corona
The contrary voltage of discharging atomizing nozzle (3) electrode, make corona discharge atomizer (3) and print platform (2) it
Between form electric field, work of the electroconductive resin microgranule (40) that corona discharge atomizer (3) sprays in electric field force
Moved to print platform with lower, and adsorbed on the surface of print platform (2), form ground floor electroconductive resin coating
(41)；
3rd step, is made first on its projected light line focal length and print platform (2) by mobile projector light source (1)
The distance correspondence of layer electroconductive resin coating (41), is applied to the ground floor electroconductive resin by projection light source (1)
The corresponding region of layer (41) carries out illumination curing, is projected light source on ground floor electroconductive resin coating (41)
The region of irradiation forms the solidified cell of crosslinking, and uncured region remains stuck to the table of print platform (2)
Face；
4th step, is covered in first again by the electroconductive resin microgranule (40) that corona discharge atomizer (3) sprays
On layer electroconductive resin coating (41), second layer electroconductive resin coating (42) is formed, projection light source is adjusted again
(1) focal length, and the corresponding region to second layer electroconductive resin coating (42) carries out illumination curing, this second
Consolidation zone on layer electroconductive resin coating (42) will simultaneously with ground floor electroconductive resin coating (41) on consolidate
Change regions curing；
5th step, the above-mentioned 4th step operation of repetition, the consolidation zone in last each layer conductive resin layer form one
The entity of stacking, removes the entity, and uncured electroconductive resin is flowed down automatically, with the entity separation, is obtained
The 3D entities of printing.
9. the Method of printing of a kind of electrostatic 3D printer according to claim 8, it is characterised in that：Institute
In the first step stated, the space between described print platform (2) and corona discharge atomizer (3) is enclosed
If a conductive side wall (6), and the electric polarity of conductive side wall (6) is charged with electroconductive resin microgranule (40)
Polarity is identical, the electric field repulsion power formed by conductive side wall (6), makes the electroconductive resin microgranule (40) will not be attached
On conductive side wall (6), and accelerate mobile to print platform (2).
10. the Method of printing of a kind of electrostatic 3D printer according to claim 8, its feature exist
In：In the described first step, electroconductive resin (4) has not only been filled with container (5), and also has been filled
Entering has the dielectric (50) immiscible with electroconductive resin (4), is set conductive by dielectric (50)
Fat (4) is isolated with the pressure source of outside, prevents high-tension current from outwards conducting by electroconductive resin (4)；
External pressure source is acted on dielectric (50), is applied to external pressure by dielectric (50) and is led
On electric resin (4), electroconductive resin (4) is made from the outlet of container (5) to corona discharge atomizer (3)
Discharge.
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| CN110624709A (en) * | 2018-06-23 | 2019-12-31 | 广东天润自动化科技有限公司 | Electric suction type dispensing equipment and control method thereof |
| CN111330754A (en) * | 2020-04-22 | 2020-06-26 | 湖南大学 | Electrostatic spraying magnetic field assisted photocuring method and device |
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