CN109927286A - Full-color shell 3D printer and color shell object based on layer-by-layer photocuring - Google Patents

Abstract

Full-color shell 3D printer and color shell object based on layer-by-layer photocuring, belong to machinery-field of photoelectric technology.The hardware and software for supporting this method includes: movable machinery system, control system, ink feeding system, projection/solidification photosystem, photo-curing material and delamination software.By the photocuring for cutting layer one by one to printing object, while the covering colored UV ink in printing object surface or interlayer in the inside of printing object of layer is cut one by one, form colored shell；Overcoming the resin material for constructing printing object can not diffuse into one another and be mixed into full color, and although colour UV ink is easy to spread mixing full color, after the superficial for printing object obtains true color shell, perfect color three dimension printed product-coloured silk shell object will be demonstrated out.

Description

Full-color shell 3D printer and color shell object based on layer-by-layer photocuring

[fields]

The invention belongs to machinery-field of photoelectric technology.It is specifically by means of the layer-by-layer curing molding MJP of multiple nozzle spraying (Multi jet modeling pringting) and stereolithography apparatus SLA (Stereo lithography Appearance), using layer-by-layer building mode, wrapped up by SLA, 3DP mode or the exposed thin layer, it is raw by colored ink nozzle At colored shell, and forms colour sandwiched full-color 3D printing method and print color shell object.

[background technique]

The global history general situation of development of 3D printing:

U.S. doctor Charles W Hull in 1986 proposes to use laser irradiation photosensitive resin table in one piece paper Face, and solidify the concept of production three-dimension object.Later, Charles WHull application related patents.Harles Hull is developed First business 3D printing machine.Just there is within 1986 the blank of SLA, SLA is the molding skill for proposing and realizing earliest business application Art.1988,3D printing industry giant 3D Systems company made First SLA in the world according to SLA forming technique principle Printer.

3D printer --- SLA250, and be commercialized.Since then, the type based on SLA forming technique is such as emerged rapidly in large numbersBamboo shoots after a spring rain, Occur in succession.

In August, 2011, the engineers of University of Southampton develop first 3D printing aircraft in the world.

In November, 2012, Scotland scientist print artificial liver tissue with 3D printer for the first time using human body cell.

Formlabs team in 2012 raises platform in crowd and is proposed a 3D printer based on SLA forming technique --- Form 1, and initiate crowd in the platform and raise to raise funds.

The 3D printing art work of a entitled " mind of ONO " is successfully auctioned in October, 2013, the whole world for the first time.2013 11 Month, the 3D printing company " solid is general " (SolidConcepts) of Texas, USA Austin designs and manufactures 3D printing gold Belong to pistol.On January 16th, [2] 2017, scientific & technical corporation Bellus 3D can completely take high-resolution face 3D photo, these Photo carries out the mask and real face that 3D printing goes out.

On April 7th, 2017, Germany's movement brand Adidas (adidas) are proposed first global sole 3D printing and are made Sport footwear, plan to start to produce in batches for 2018, to cope with fast-changing fashion, produce more customed products.When To today, the tissue of research and production SLA technology, enterprise, team are already numerous.Domestic associated mechanisms have the Central China University of Science and Technology, Xi'an Communications University, logical, the intelligence base in Zhuhai west etc.；Foreign countries have 3DSystems company, EOS Corp., Z Corporation, CMET public Department, D-MEC company, Teijinseiki company, Formlabs company etc..

The plane that one F1 racing car normal printer used in daily life of successful print can be designed with printing calculator Article, and so-called 3D printer and normal printer working principle are essentially identical, only printed material is somewhat different, commonly beats The printed material of print machine is ink and paper, and 3D printer is provided with different " the printing material such as metal, ceramics, plastics, sand Material ", is raw material true, can be " printed material " from level to level by computer control after printer is connect with computer It stacks up, the blueprint on computer is finally become in kind.Generally, 3D printer is " can to print " to go out true 3D A kind of equipment of object, such as one robot of printing, printing toy car, print various models, even food etc..Institute It is the technical principle for having references to normal printer to be generically called " printer ", because the process of layering processing and ink-jet are beaten It prints quite similar.This printing technique is known as 3D three-dimensional printing technology.There is many different technologies for 3D printing.They are not It is in a manner of available material with place, and with different layer building establishment portion parts.3D printing common used material have nylon glass, Polylactic acid, ABS resin, durability nylon material, gypsum material, aluminum material, titanium alloy, stainless steel, silver-plated, gold-plated, rubber Material.

3D manufacturing technology is mainly for the manufacture of multiple kinds of molds, model etc.；It can also pass through in the feed and other ingredients are added, The wax-pattern in precision-investment casting is replaced with SLA prototype model.SLA technology forming speed is very fast, and precision is higher, but since resin is solid Contraction is generated during changing, and is inevitably resulted from stress or is caused deformation.Therefore it is high to shrink small, quick solidifying, intensity for exploitation Light-sensitive material be its development trend.

Photocuring 3D printer essential structure includes with lower component: mechanical system: keeping and adjust the machine of lifting platform height Tool device；Including components such as motor, Z axis guide rail, lead screw and sensors.

Control system: using electronic technology, keeps whole system operation and control.For SLA in addition, keeping and adjusting to rise Mechanical device, the driving device of resin scraper plate and the height controller of resin liquid level of platform height drop.

Structure housing: using metal plate, plastic or other material, and various components are fixedly mounted inside housings.

2 kinds of photocuring 3D printing point:

* the layer-by-layer curing molding MJP of multiple nozzle spraying (Multi jet modeling pringting) and

* stereolithography apparatus SLA (Stereo lithography Appearance).

Multiinjector prints (MJP:Multi jet modeling (pringting)):

MJP is a kind of new quick shaping process, it is capable of providing smooth, high-resolution and with complex geometric shapes Plastic part.Whole process only needs UV lamp and light-sensitive material.The technology originates from earliest: the 3D of three dimensional printing (3DP) technique is beaten Print technology.It is that Massachusetts Institute Technology Emanual Sachs et al. is developed.E.M.Sachs applied for 3DP in 1989 (Three-Dimensional Printing) patent, the patent are the core patents of non-moulding material droplet ejection forming scope One of.The 3DSystems brand in the U.S. later, by above-mentioned " non-shaped material droplet injection " change are as follows: " photosensitive resin class at The injection of shape material droplet carries out successively similar printing molding in conjunction with photocuring ", thus generate another kind of colour print technology and quotient Industry type: such as the model of 3DSystems brand: 3600 type of ProJet.

Multiinjector prints (MJP:Multi jet modeling (pringting)) principle technical overview:

Basic print procedure: the design process that Britain engineer " printing " goes out unmanned aerial vehicle 3 D-printing is: first passing through meter The modeling of calculation machine modeling software, then the threedimensional model built up " subregion " is sliced at layer-by-layer section, thus instruct printer by Layer printing.The Standard File Format to cooperate between design software and printer is stl file format.One stl file uses three Edged surface comes the surface of approximate simulation object.The smaller surface resolution that it is generated of triangular facet is higher.PLY is a kind of by scanning production The scanner of raw three dimensional file, VRML the WRL file generated are often used as the input file of full-color printing.

Slicing treatment: printer by reading the cross sectional information in file, use is liquid, the material of powdery or sheet will These sections are printed layer by layer, then each layer cross section is glued together in various ways to produce an entity.It is this The characteristics of technology, which is it almost, can produce the article of any shape.The thickness (i.e. Z-direction) in the section that printer is got with And in-plane, that is, direction X-Y resolution ratio is calculated with dpi (pixel per inch) or micron.It is general with a thickness of 100 microns, i.e., 0.1 millimeter, also having part printer such as ObjetConnex series there are also three-dimensional S ystems'ProJet series can To print 16 microns of thin one layer.And in-plane can then be printed with resolution ratio similar in laser printer.It prints The diameter of " ink droplet " that comes is usually 50 to 100 microns.A model, which is produced, with conventional method usually requires a few hours To a couple of days, depending on the size of model and complexity.And it can will then shorten to the time count with the technology of 3 D-printing A hour, it is by depending on the performance of printer and the size of model and complexity certainly.Traditional manufacturing technology is such as Injection moulding can largely manufacture polymeric articles with lower cost, and three-dimensional printing technology then can be more flexible with faster And the more inexpensive relatively small number of product of method production quantity.The three-dimensional printer of one Desktop Dimensions, which can meet, to be set The needs of meter person or concept development group modeling.

Complete printing: the resolution ratio of three-dimensional printer is (possible in curved surface enough for most of applications Can be relatively rough, as the sawtooth on image), the article that obtain higher resolution can be by the following method: first with working as Preceding three-dimensional printer gets slightly bigger object, then the smooth " high-resolution in surface can be obtained past slightly surface polishing Rate " article.

Some technologies can be printed using multiple material simultaneously.Some technologies can also use branch during printing Object is supportted, for example just needs to use some thing (such as soluble east for being easy to remove when printing some objects for having projecting shape West) it is used as supporter.

Printer using multiinjector printing (MJP:Multi jet modeling (pringting)) principle has: 3600 type of ProJet, the method and be based on " laser galvanometer scanning solidification " and be based on " LCD, DLP photocuring " which uses SLA SLA (Stereo lithography Appearance, that is, stereolithography apparatus method) technical principle 3D printer Principle it is different, without sinking the reservoir and powdering of Dip shaped article, but printer uses 3DP technology path layer when working The folded three-dimensional object out of layer heap, molding materials and backing material are directly sprayed by nozzle；Nozzle is by one layer of very thin liquid light For quick resin spray on lifting platform, this coating, which is then placed under ultraviolet light, carries out curing process.Lifting platform declines one section later Minimum is equal to the height for cutting layer, for next layer of stack operation, in cycles.The mouth of installation on the print head is divided into 2 classes: molding materials nozzle and backing material nozzle, the backing material that wherein backing material nozzle is sprayed finally use solvent It is removed from shaped article.

Each layer of spraying, the plane motion of 2 dimensions of print head, is to be realized by independent orthogonal X guide rail Y, 2 are led Rail horizontal quadrature is placed, and is also possible to drive the biaxial hinge construction of 1 vertical moving axis by the connecting rod of 1 fixed vertical axis, Obtain the in-plane displancement of print head.General print head is synchronous to drive nozzle in 2, the distance of molded surface of the nozzle away from printing slice Within 1 millimeter.Since multiple nozzle spraying has been by the injection of the selectivity of object slice, thus the irradiation position of curing light source It sets without selection, is illuminated on the face being entirely sliced with the ultraviolet light of large area, consolidated so that being sprayed with material position to be solidified Change；The thus light valve light source without regioselectivities such as laser scanning or DLP/LCD.Structure is simplified.Finally, this work After printing process is completed, the cleaning to object is then carried out again.It thus may be implemented one and complete clean object, by prototype After being taken out in resin, finally solidified, also need secondary operation certainly, usually we are first by supporting point, that is, print The additional structure of object separate or with tool, solvent removal, then through polishing, plating, spray painting or coloring treatment to obtain the final product To the product of requirement.

The company of table and product: foreign countries have 3DSystems company, EOS Corp., Z Corporation, CMET Inc., D-MEC company, Teijinseiki company, Formlabs company etc..3D Systems company starts to walk in SLA technology research field Earliest, the type accordingly produced is also numerous, such as: Projet1500, Objet3600 and the ProX released on EuroMold 800 etc..

Even to this day, China is studied and is produced MJP, also there was only Qingdao You Ni scientific & technical corporation.

Stereolithography apparatus method SLA:(Stereo lithography Appearance):

SLA was before more than 30 years, and 3D printing emerges that day, exactly since photocuring technology SLA stereo lithography. What First quickly shaping device in 1984 used is exactly stereolithography technique, in present rapid forming equipment, It is the most deep with the research of SLA, with also the most extensive.

(LCD, DLP photocuring) SLA development course

Generation nineteen ninety, laser SLA just have LCD, DLP to solidify 3D technology after developing more than ten years, and DLP, LCD photocuring print skill Art is continuous exposure, and one is face molding, and theoretical velocity reaches hundred times of laser galvanometer mode.The face molding of DLP, LCD are facilitated Many distinctive machines, such as the machine of many jewelry grades can only use the principle of DLP, can be only achieved 100 microns it is below Precision.The intrinsic light source speck of SLA is too big or small speck sweep time is too long, is not suitable for superhigh precision and printing speed, DLP A possibility that limiting large scale printing, because nearly all DLP is to rest on 1280 always with the dmd chip of Texas Instrument Resolution ratio or so.Then many DLP machines or printing are big and coarse, youngest small but excellent thin.Because that trivial 1000 in x-axis Pixel, widened it is thick with regard to particle, it is fine small with regard to range；Y-axis is similarly.

LCD curing technology is later than DLP technology.It is all more than ten years because display technology includes panel and projection two major classes Preceding development.DLP is able to bear and handles just the light wave of 405nm, the DLP technology for then having 3d to print.Similarly, a small number of It is ultraviolet that LCD panel can also endure 405nm, then there is this technology of LCDmasking.

Stereolithography apparatus method SLA:(Stereo lithography Appearance) technical principle:

Principle based on the cured 3D printer of laser galvanometer scanning:

Photocuring mainstream technology, first generation SLA are light source using ultraviolet laser (355nm or 405nm), with galvanometer system System controls laser facula scanning, and laser focuses on the photo-curing material surface being stored in stock chest, is allowed to by point to line, by Line is to face consecutive solidification, as soon as completing the drawing performance of a level, the liquid resin thin layer selectivity of inswept place is had cured, Then height of the lifting platform in the mobile synusia of vertical direction, another level of resolidification.Be layering composition one in this way 3D solid.

Resin scraper plate is used before each layer of solidification；Because of the high viscosity of photosensitive resin material, after every layer of solidification, Liquid level is difficult rapid levelling in a short time, this will will affect the precision of entity.It is scraped using scraper plate after cutting, required amount of resin It will be applied by visibly homogeneous ground Tu on a upper lamination, available preferable precision, makes product in this way after laser curing Surface is more smooth and smooth.

Resin liquid level height controller is the stabilization for controlling liquid level, is generally used floating with lifting platform reverse movement Cylinder makees and the reversed displacement of lifting platform, the rising of liquid level caused by the lifting platform of decline, by liquid caused by the rising by floating drum Face decline is offset.

Temperature control equipment: using heating apparatus, cooperates sensor and control system, so that the temperature of resin is maintained at pre- In fixed range, and constant temperature.

Certainly, it needs to go out three-dimensional entity model by CAD design in advance, is carried out model at slice using discrete program Reason, designs scan path, and the data of generation will accurately control the movement of laser scanner and lifting platform；Secondly, laser beam is logical The scanner for crossing numerical control device control, is irradiated to liquid photosensitive resin surface by the scan path of design, makes surface specific region After one layer of interior resin solidification, as soon as a section of part is generated after layer completion of processing；Then, lifting platform decline is certain Distance covers another layer of liquid resin on cured layer, then carries out second layer scanning, and the second cured layer is bonded in previous solid securely Change on layer, is formed by stacking 3 D workpiece prototype from level to level in this way.

Certain lifting platform is to rise or drop to have 2 kinds of Scheme Choices, and the z-axis direction of all photocuring technologies is divided into two schemes: Desktop type is all light source under, and by window and release film, molding is up pulled out, but liquid level needs release film；It is industrial large-sized Be all light source upper, molding sinks to liquid level hereinafter, liquid level does not need release film.

Finally, then carrying out the cleaning to object again after this technique printing is completed.Thus may be implemented one it is complete Finally solidified by prototype after being taken out in resin at clean object, also need secondary operation certainly, usually we are first By supporting point, that is, the additional structure of object printed separate or removed with tool, then through polishing, plating, spray painting Or coloring treatment is desired product.

SLA technology is mainly for the manufacture of multiple kinds of molds, model etc.；It can also be used in the feed by the way that other ingredients are added SLA prototype model replaces the wax-pattern in precision-investment casting.SLA technology forming speed is very fast, and precision is higher, but due to resin solidification Contraction is generated in the process, is inevitably resulted from stress or is caused deformation.Therefore it is high to shrink small, quick solidifying, intensity for exploitation Light-sensitive material is its development trend.

Cured 3D printer principle is imaged based on DLP and LCD area source:

The ultraviolet digital projection technique of DLP and LCD passes through the digital micromirror technologies of Texas Instrument, choosing using 405nm light source The liquid resin that projects area source of selecting property is allowed to solidify.Wherein DLP technology includes fast 100 times of famous speed The continuous printing technique of CLIP.

DLP from laser scanning to digital projection, then to a kind of new curing technology of newest LCD, be exactly using DLP and The optics pixel-matrix of LCD replaces original laser galvanometer scanning system.It is divided source wavelength and extends to visible light model It encloses, one is 405nm ultraviolet, and one is 400-600nm visible light.LCD exposure mask photocuring: with 405nm ultraviolet light (and DLP mono- Sample), in addition the technology of LCD panel alternatively property light transmission, is had very in LCD mask technique (LCD masking) or industry Mostly respective name, such as selection digital light handle liquid crystal DLP technology, UV mask solidification etc..

LCD mask technique since 2013 with regard to someone develop.It is interesting to search out earliest wound visitor's common computer LCD display removes backlight, in addition 405 LED lamp bead does backlight, tries to print uv resin.The solution of z-axis is nothing but Sliding block, lead screw and stepper motor, motor driving plate can be solved with single-chip microcontroller class or the most popular RAMPS plate of current FDM Scheme.In fact as the driving of all displays, VGA or hdmi connect liquid crystal drive board and connect LCD panel again for the driving of LCD, Backlight 405nm light bulb or LED array, add film eyeglass to be uniformly distributed illumination.Visible-light curing: another kind is exactly Visible light cure writes a Chinese character in simplified form VLC, and the condition of ultraviolet light must be used by abandoning former all photocurings completely, and use is general Light passing (visible light, 405nm-600nm) can just make resin solidification, realize printing.It is exactly that light source rises again by principle differentiation Grade is not added any repacking or changes backlight, directly as light source with common LCD display panel.Certainly, it is seen that photocuring is not only It is confined to LCD screen, can extend to any display (plasma, CRT, rear-projection, LED array, OLED) and any projection (DLP, 3LCD, SimpleLCD, LCoS) and other any display technologies (laser scanning imaging, fiber array etc.).

Machine code name or producer include: wanhao, KLD1260, YLD01, Si Taike, zhiyao, Nova, Easy3D..... there are also other different solutions certainly.It depends primarily on using exposure mask of the different screen as light transmission, LCD It is below typically all 405led lamp as backlight.Here everybody voluntarily searches for.

Using 2K screen, a hard defects for mentioning LCD technology of having to here: light efficiency is without DLP high.In every case pass through The brightness of 405nm lamp is increased to reach more luminous fluxes, or the visible light LCD of common luminous flux cooperates high sensitive resin, obtains To curing rate cannot be compared with the shaping speed of DLP.There are a practical reference value, same 100 microns thick solidification, DLP is Zero point several seconds Dao several seconds, 405nm ultraviolet LCD or visible light LCD needed more than ten seconds by tens seconds to solidify.Here one is drawn New solution reaches the high speed within one second plus visible light technology with the projection other than DLP, and projection can reach simultaneously To at high speed, large scale, high-precision, there are also low costs.It is simply perfect, but there is presently no commercializations.

In conclusion SLA race starting is more early, but develops and restricted by core devices and patent.DLP starts late, but more Its powerful advantages is more embodied, unique problem is that this carriage only has one people of Texas Instrument to control.LCD starts to walk later, only It is rudiment, also touches the threshold less than mainstream equipment, the relevant technologies maturity is high, and future will do all one can to catch up.Certainly, photocuring skill Art, except key problem light source, there are also software, automation, using with many corresponding problems of industry.Another key problem, light Solidified resin and a core technology.

The advantage of SLA technology: Stereolithography method is the rapid prototyping manufacturing technique occurred earliest, and maturity is high, is passed through The inspection of time.Prototype is directly prepared by CAD mathematical model, process velocity is fast, and life cycle of the product is short, without cutting element with Mold.Construction profile complexity can be processed or being difficult to molding prototype and mold using traditional means keeps CAD mathematical model intuitive Change, reduces the cost of errors repair.Printing multiple parts does not sacrifice speed simultaneously.Because this as DLP technology, be face at Type light source.

The defect of SLA technology: SLA system cost is high, and operation and maintenance cost is excessively high.SLA system be will to liquid into The precision equipment of row operation, to operating environment requirements harshness.Molded part is mostly resinae, intensity, rigidity, limited thermostability, no Conducive to saving for a long time.Pretreatment software and drive software operand are big, too high with processing effect relevance.Software systems operation Complexity, introduction are difficult；The file format used is not that numerous designers are familiar with.

The some disadvantages of DLP and LCD light source compared with laser light source: the optional range of LCD is seldom: this key problem in technology component LCD needs to have 405 light selectivity transmission well, and a few hours high intensity that also stand tens watts of 405LED lamp beads is dried Roasting, there are also the tests of heat dissipation and heat resistance.So not being on every money LCD screen is all usable.The above solution has solved LCD selects this major issue.Simultaneously, it is proposed that user carries out the psychological preparation for burning the replacement of LCD screen void.This LCD screen is Attrition component.

Even to this day, the tissue of China research and production SLA technology, enterprise, team are already numerous.It is domestic mutually to shut down The Gou You Central China University of Science and Technology, Xi'an Communications University, logical, the intelligence base in Zhuhai west etc.；There are western light passing solidification 3D printer, inscription exhibition MBot Form1 3D printer, ATSmake 3D printer etc..

[summary of the invention]

The object of the invention:

It solves the problems, such as that the 3DP/SLA technology of no powdering can not all generate true color printing object, overcomes for constructing The resin material of printing object can not diffuse into one another and be mixed into full color, and colour UV ink be although easy to spread mix it is full-color Color, but if one side physicochemical property is poor for as the material for constructing printing object, on the other hand, even if building is beaten The resin material of object is printed with micro ejection, meets the purpose of the vision uniform color mixture of assorted accumulation, accumulation building printing object The speed of slice will substantially reduce, and the time for printing object also will be unable to bear, and also overcome due to spraying colour UV ink Print head high score resolution ratio to print speed limit；Further more, to overcome the Reverse gantry surface of shaped article (according to south of going up north Under rule, the Southern Hemisphere belongs to Reverse gantry surface) the problem of can not colouring.

This defect of colour print object can not be generated by solving current SLA technology all.And this defect is not available The method of the simple UV ink that fills spray solves: because the resin liquid material of the solid color of material pond storage just just defines in principle Colored realization；If paint color simply additional on the boundary of shaped article will lead to 2 problems: firstly, to Make the surface of color inks covering shaped article, it is necessary to the additional spraying colorant at slice boundaries, the residue of ink after solidification Water will pollute entire resin liquid material；Secondly, the surface at the backslash angle for shaped article, will be faced with to paint ink laying Direct solidification, residual material pollution is generated if curing depth is too shallow, the material pond resin being cured if too deep covers The surface of shaped article；The seamless connection between colored ink coloured silk layer is also an obstacle again！The skill of innovation must thus be taken Art thinking and means can be only achieved surface coloring and do not generate other adverse effects.

Feature of the present invention:

In conjunction with air brushing technology and the reasonable position for arranging colored shell, accessory configurations are simple, mature, reliable for operation and color Color fine and smooth, color resolution height, it is often more important that the requirement to characteristics such as self-strength, the firmness of chromatic ink is greatly relaxed If, can be under the setting off of transparency printing material by the position arrangement of colored shell when printing the deep internal of object Express internal structure.

Key problem in technology are as follows:

The present invention is divided into: colored shell is successively to be set up by the mode of air brushing colour, and be divided into:

* the colour sandwiched scheme of air brushing and * air brushing color table layered scheme.

The hardware and software for supporting this method includes: that movable machinery system, control system, ink feeding system, projection photosystem, light are solid Change material and delamination software.By the photocuring for cutting layer one by one to printing object, at the same cut one by one layer by colored UV ink It covers in printing object surface or interlayer in the inside of printing object, forms colored shell；The colored shell of object will thus be printed The printing of layer and the printing of rest part use the printing head and relatively large amount (unit of micro (unit time discharge rate is few) respectively Time discharge rate is big) printing head complete, the needs of the printing speed of printing object structure division energy again can be met simultaneously Meet the needs of the diffusion fine resolution of printing object colour shell；Start the colour sandwiched scheme of air brushing or air brushing colour surface layer The workflow of scheme, creative proposition " color inks shell " concept, so that building resin material wraps up " color ink water hull Layer ", after the superficial (contain deep) or surface that print object obtain true color shell, perfect color three dimension printed product will be by It shows.

The design feature of multiinjector printing technique (MJP:Multi jet modeling pringting) are as follows:

The nozzle of multiinjector print head (component) includes 3 class nozzles: for generating colored shell colour ink nozzle, being used for It generates the molding materials nozzle of article body and the backing material nozzle for generating support, the nozzle hole number of every class nozzle is many In 1, at least need to possess 3 class material-storing boxs: color ink ink storage box (6), molding material-storing box (7) and support material-storing box (8).Or 2 class Material-storing box: color ink ink storage box (6), molding material-storing box (7)；Spraying can be taken into account by the molding materials nozzle of molding material-storing box (7) Support structure part, last mechanical removal support structure part, and save and omit backing material nozzle etc., simplify multiinjector printing The structure of head, but support difficulty is gone to increase.

The important component of the printing equipment of multiinjector printing technique further include: lifting platform, structure member, electronic control system System, specific connection relationship are as follows: keep generating the controllable opposite fortune of 3 dimensions between lifting platform and multiinjector print head by mechanical system It is dynamic, it is to pass through infusion between multiinjector print head (1) and color ink ink storage box (6), molding material-storing box (7) and support material-storing box (8) (9) are managed to be connected；It is the cramped construction of fissionization installation or integrative installation technology between them.Other part temperatures control dresses It sets and is controlled electronically, be all routine techniques, without repeating.

Using in the colour sandwiched scheme of air brushing, must contain in the material-storing box A (7) of molding materials: transparent material is shallow The translucent material of color.And without requiring in this way, the material of random color can be used in air brushing color table layered scheme.And The executing instruction of electronic control system takes of the invention: the work of air brushing colour shell scheme or air brushing color table layered scheme Process, shaped article are the shaped article with air brushing colour shell.

The workflow of the colour sandwiched scheme of air brushing or air brushing color table layered scheme:

2 schemes have its common ground, as general 3D printing process, are needed in advance to object to be printed CAD image data carry out 3 dimensions and model and be sliced, and form slice file, then be input in 3D printer, and start printer.

First: control system establishes the relative position of lifting platform and multiinjector print-head nozzle, so that nozzle and lifting platform The distance of bottom cut layer height or so at 1-2；Then support is sprayed by the backing material nozzle of multiinjector print head again Material carries out bottoming and cuts layer laying (often needing 1-8 layers).

Next it begins to construct the first of colored shaped article and cuts layer:

The layer building of cutting of scheme colour sandwiched for air brushing includes: the peripheral enclosure wall that is sprayed by molding materials nozzle, inner body Part, but peripheral wall portion centainly uses transparent or semitransparent resin material, support portion quartile of the backing material nozzle in needs Backing material is sprayed, that completes the stage other than colour sandwiched cuts layer building content.

And include for the layer building of cutting of air brushing color table layered scheme: the inner body part that sprayed by molding materials nozzle and by Backing material nozzle is complete in addition to also needing to spray the peripheral wall portion of building other than the support portion quartile of needs sprays backing material Interim at the spraying process other than colored shell cuts layer building content.

Next 4 kinds of modes are to complete the spraying process of deployment of photocuring and colored shell:

1st kind of mode: it is synchronous solidify --- --- first with colour ink nozzle to the slit gap between enclosure wall and inner body into Carry out disposable photocuring processing after the spraying of row color inks, but color inks generate impact to being laid with content.

2nd kind of mode: asynchronous solidification 1------- is first laid with content (enclosure wall and inner body) progress light to above-mentioned sprayed Solidification forms the gap of more solid slit recess, reuses colored ink nozzle to the progress between enclosure wall and inner body Photocuring processing is carried out after the spraying of color inks again.

3rd kind of mode: asynchronous solidification 2-------- is sprayed on the basis of smooth using colored ink nozzle, is established simultaneously Curing chromatic parapet；Again after 2 side sprays of colored parapet apply and are laid with content (enclosure wall and inner body), then photocuring is carried out, formd More solid enclosure wall wraps up colored parapet with inner body.

4th kind of mode: mixed mode --- ----take into account mode 1-2-3 is flexibly handled, it is therefore an objective to be obtained as high as possible Speed and color effect.

Complete above-mentioned 1 layer completely cut the printing of layer after, control system drives between lifting platform and multiinjector print-head nozzle Away from 1 height for cutting layer is increased, the printing for all lower layers is ready.It repeats the above process, 1 end layer by layer and the paving that renews If smoothing handles surface until the completion of entire shaped article, finally removes backing material, perfect full-color 3D object is obtained Product.

Further, colored ink nozzle is carried out the spraying of color inks by we to the slit gap between enclosure wall and inner body Be known as: spraying establish ink sublayer: enclosure wall and " the colored shell " of spraying, with a thickness of millimeter order.Due to color ink The absorption characteristic of the color optical wavelength of water is different, is often not easy to be stacked excessively high thickness, this just needs thickness thinning, multilayer ink Water sublayer is stacked into the thickness that object cuts layer, photocuring is being carried out to the ink sublayer of each spraying, if object cuts layer certainly It is inherently very thin, just do not have to choose multilayer sublayer.Sublayer and printing cut the quantity of layer than can be 1:1 relationship, printing It is fastest；In the case of 2 layers and 2 layers or more, print speed is declined.1 printing is cut for layer, sublayer is single layer Thickness is identical as layer is cut or sublayer is multiple-level stack, what the thickness that 1 layer or 2-10 layers of object was equal to 1 printing cuts thickness Degree.

Further, air brushing color table layered scheme and the colour sandwiched scheme of air brushing in addition to it is above-mentioned it is different other than, another difference Be: the material in the material-storing box A (7) of molding materials, molding materials need not be chosen for transparent material or light color is translucent Material is necessary condition, does not need to limit again to the color of material.

Further, for air brushing color table layered scheme, the position for the peripheral wall portion that support resin material is printed is Boundary (the actual size of printing objects are as follows: big in the geometry of air brushing colour surface layer object of layer is cut beyond practical printing object It is small), periphery " support shell " of the entire shaped article foundation of a package on colored surface layer will be formed, the removing of support is removed When will impact colored surface layer, increase the requirement of the physicochemical property to colored ink, need material it is firm, in conjunction with molding materials Securely, non-fusibility is excellent in soda acid." support shell " needs not be closure, be mainly used for solving Reverse gantry surface (according to It goes up north the rule gone down south, the Southern Hemisphere belongs to Reverse gantry surface, the outwardly directed normal direction of curved surface and the 2 of vertical upwardly direction The angle of vector is greater than 90 degree of surface portion) the problem of can not colouring, the support section also branch as carrying colour ink Support part point plays covering, protection simultaneously for positive-angle surface (surface portion of the angle less than 90 degree of above-mentioned 2 vector) And help keep the diffusion of colored ink to cover in the surface of object.

Stereolithography apparatus method SLA:(Stereo lithography Appearance) design feature are as follows:

It is divided into stock chest bearer solution or conveyer belt bearer solution.

Stock chest bearer solution:

It is inherited in technical principle: being light source upper, curing molding liquid level is exposed to top, and it is release not need surface Film, curing molding layer sink to liquid level or less.Thus support that hardware system of the invention includes: DLP, LCD digital light projection Device or laser galvanometer scanning device；Stock chest, lifting platform, resin scraper plate, resin liquid level height controller, temperature control dress It sets and electronic control system.

The specific connection relationship of the printing equipment:

Colored spray remittance head (1) for air brushing color inks is mounted on the vertical parallel axis fortune that can make the movement of 2 dimensional planes Dynamic circuit connector at mechanism on, they are the planner motion systems collectively constituted by movement rotation axis A (4) and fixed bias circuit (6)；Storage Print cartridge (3) sprays remittance head (1) to colour by ink-feeding tube (2) and transmits colored (UV) ink；

Under the drive of the motor, lifting platform bracket (19) support lifting platform (14) carry shaped article (12) every time under It drops 1 and prints the height for cutting layer, form what elevating movement direction (11) was vertically oriented；To guarantee the smooth of resin liquid level Degree, the fortune of horizontal direction shown in the direction of motion (16) of the resin scraper plate (15) along scraper plate after lifting platform (14) declines every time It is dynamic, to strike off liquid level.Resin scraper plate (15) is selective part, can be with can not have to.

The liquid level control device of stock chest (10) is the driving device by floating drum (17) and control floating drum vertical height It constitutes, and forms vertical direction shown in buoy displacement direction (18), when work needs to keep the stability of liquid level.

Each layer of solidification is that laser (9 are issued) laser beam (8) are deflected by: galvanometer (7) according to printing object Hierarchical model scans liquid level, as shown in liquid level photocuring snap point (13).

Colour sandwiched is to cut the period between layer in the above-mentioned 2 adjacent printings of completion to complete: in lifting platform bottom Or ink sublayer (22) are established on front layer (21), the sublayer be located proximate to printing object edge, the edge be exactly future at The surface superficial part (about: 20---100 decimillimeter depth) of type object is basically the appearance that people observe the shaped article of sight Part；Thus the resin of stock chest (10) must be transparent or light；Since in the case where no side supports, ink leans on it The surface tension of itself can not support too high height, therefore generally require the laying of 2 layers or 2 layers or more of sublayer, ink The laying on layer surface layer (23) needs as being exactly, after 1 to multilayer (most 10 layers) sublayer laying, by solidification photon Layer-selective, which solidifies light (24), to carry out being scanned solidification according to the picture that colour sandwiched son cuts layer, and the cured light is covered The area of lid must cut the area of layer beyond son, carry out complete interference solidification, otherwise will strike off process will blow off it is uncured Color inks and pollute material pond；Lifting platform (14) declines the height that layer is cut in 1 printing, the resin liquid of resin liquid layer (25) later Layer liquid level (26) submerges the top that just cured son cuts layer, while resin scraper plate (15) strikes off liquid level again；Sublayer is 1 Layer or 2-10 layers, can be equal in width air brushing (refer to: each sublayer is all equal in width) or staggeredly air brushing；Staggeredly air brushing Purpose be to enable colour sandwiched son to cut layer sufficiently to cover inside shaped article, need to solidify the transparent tree above sublayer 1 sublayer is re-layed on rouge, which will be wider than 1 following sublayer, due to gravity and the effect of diffusion, relatively short Under the non-comprehensive support for the next sublayer having cured, which will be bent.Statement in detail are as follows: saturating above sublayer solidifying 1 sublayer is re-layed on ming tree rouge, which will be wider than the width of 1 following sublayer, the work spread due to gravity and liquid With the sublayer will be bent, and block internal sight thoroughly to the eye, make colour sandwiched can sufficiently cover shaped article table Face.

Then according to the figure of printing object slice, formation printing layer-selective solidifies light (28) and completes consolidating for this slice Change.It moves in circles, until complete object of printing.

Further, ink storage box (3), ink-feeding tube (2) and colored spray remittance head (1) can be seperated or integrated, nothing The Spraying-drawing apparatus of the ink-feeding tube and ink storage box that need to separate is constituted.

Further, the liquid level control device of stock chest (10) is provided with by floating drum (17) or be utilized on wall The hole at liquid level position, when drop lifting platform (14) is per instantly, due to the immersion of construction package, liquid level, which can rise the certain altitude hole, to be risen That has arrived acts on from overflowing, and maintains the height of liquid level.

Further, the quantity of sublayer be object cut 2 times of layer number or 10 times of 2 times or more hereinafter, sublayer quantity It is equal to cut layer number with object, increases print speed at this time, but be reduction of colour quality, especially in terms of the light transmission on.

Conveyer belt bearer solution:

It is inherited in technical principle: the thinking of the delivery photosensitive resin liquid of 3D-SYSTEM company, U.S. conveyer belt.It supports Hardware system of the invention includes: that DLP, LCD digital light projection device or laser galvanometer scanning device or noncoherent face are solid Change light source；Lifting platform, ink air brushing component, temperature control equipment and electronic control system.

Specific connection relationship between the device assembly: compared with stock chest bearer solution, the program eliminates stock chest, Solidify light (44) and carries out comprehensive illumination without selection using noncoherent curing light source (43)；Inking is passed through by ink storage box (32) It manages (33) and conveys UV ink to spray remittance head (30), when air brushing head is carried out as shown in air brushing head direction of displacement (34) along guide rail (35) Reciprocating motion when, can be on the light transmission conveyer belt (42) under the roller (41) that constrain by roller fixed rotating shaft (40) drives proportionately The slice of type object sprays out color inks, forms spraying object slice (45) and is passed by the transmission of light transmission conveyer belt (42) It is sent to the lower section of the lifting platform (36) of carrying shaped article (37), such as shown in object to be solidified slice (39)；The lifting platform is in electricity Can be along vertical direction upper and lower displacement under the driving of machine, the direction as shown in lifting platform direction of displacement (38)；When needing to solidify When slice, lifting platform declines the height of 1 layer of printing slice, close on light transmission conveyer belt (42), and is held against sprayed ink Water, after having carried out photocuring, lifting platform rises certain height, prepares for slice solidification next time.

The front end of sundries scraper plate (46) is close to light transmission conveyer belt (42), is the sundries for cleaning light transmission conveyer belt (42), The sundries wiped off falls direction such as: shown in sundries falling direction (31).

Other temperature control equipments and electronic control system etc. are all routine techniques, without repeating.

Further, solidify light (44) can be used noncoherent curing light source (43) carry out comprehensive illumination without selection or It is the light source shone using the selective light of laser scanning, DLP and LCD, the out-of-flatness due to light transmission conveyer belt (42) can be overcome Or ink amount it is uneven it is consistent caused by, the configuration error for cutting layer to be solidified of shaped cut sheets.

Further, ink storage box, ink-feeding tube and colored spray converge head can be it is seperated or integrated, without the defeated of separation Ink pipe and ink storage box.

Further, the driving for lifting platform, air brushing head and floating drum described in above each scheme, be it is electric and pneumatic or Hydraulic-driven

Further, the sundries of cleaning light transmission conveyer belt (42) is using sundries scraper plate (46) or using gas, liquid Body washes away, or the cordless of vibration is realized.

Full-color shell 3D printing method based on layer-by-layer photocuring color shell object generated:

Color shell object is divided into colour sandwiched object and colored surface layer object:

Colour sandwiched object, refer to colored shell (referred to as color shell) be in a manner of colour sandwiched in conjunction with structural materials, it is whole A coloured silk shell is wrapped up by structural materials, is completely in the inside of structural materials, position can also be arranged in printing object Deep, for expressing internal structure, it is exposed in outermost structural materials must be it is transparent or translucent, do not answer shielding light Line.

Colored surface layer object, refer to colored shell (referred to as color shell) be in a manner of colored surface layer in conjunction with structural materials, it is whole A coloured silk shell package structure material, structural materials are completely in the inside on colored surface layer, and colored surface layer is supported material package； Support material is finally used solvent dissolution to remove, and final colour surface layer is exposed to most appearance.

Beneficial effects of the present invention:

For multiinjector scheme: the proposition of colored shell mode colours universal color ink to three-dimensional object surface The feasible foundation provided in theoretical and method is realized, more suitable for that will integrate that physicochemical property is not good enough and mixed characteristic is excellent Ink, is easy to be sprayed on reserved by molding materials and backing material, by peripheral enclosure wall, inner body part and is surrounded small In recessed joint gap, and shell mode is taken to have the surface that can colour object backslash angle, can finally reach surface coloring and not generated Other adverse effects.

Stock chest bearer solution: realizing color articles, will not generate uncured residual ink and pollute entire tree Rouge liquid material；And it takes sandwich like way to have the surface that can colour object backslash angle, can finally reach surface coloring and does not generate it His adverse effect.

Conveyer belt bearer solution: will save stock chest, or even save selective projection light, and it is colour sandwiched can be with Be directly exposed on the surface of shaped article, and eliminate the backing material in 3DP photocuring scheme, color articles it is true Feel more life-like.

[Detailed description of the invention]

The full-color 3D printing device main member schematic diagram of 3DP of the Fig. 1 based on full-color shell

The contrast schematic diagram of the colour sandwiched object of Fig. 2 coloured silk shell object and colored surface layer object

The full-color 3D printing schematic device of the colour sandwiched SLA of the air brushing of Fig. 3 stock chest bearer solution

Stacking method schematic diagram Fig. 4 colour sandwiched as constructed by sublayer

The full-color 3D printing schematic device of the colour sandwiched SLA of the air brushing of Fig. 5 conveyer belt bearer solution

Label declaration:

(1) multiinjector print head (can be integrated, without isolated ink-feeding tube and ink storage box)

(2) lead screw

(3) it is oriented to cylinder

(4) Z axis motor

(6) color ink ink storage box

(7) material-storing box is formed

(8) material-storing box is supported

(9) perfusion tube

(10) lifting platform

(11) elevating movement direction

(12) shaped article

(13) rotation axis is moved

(14) fixed bias circuit

(15) lifting platform prime coat

(16) lifting platform bracket

(17) solidify light

(18) structure housing

(19) backing material nozzle, colored ink nozzle, molding materials nozzle

(20) ultraviolet curing lamp

(21) inner body

(22) ink sublayer

(23) colored shell

(24) colored shell

(25) color content

(26) enclosure wall is supported

(27) transparent enclosure wall

(28) support structure

(29) empty in object

(30)

(31) enclosure wall office is cutd open

(32) enclosure wall office is cutd open

(33) prime coat

(34) layer is cut in printing

(41) colored spray converges head (can be integrated, without isolated ink-feeding tube and ink storage box)

(42) ink-feeding tube

(43) ink storage box

(44) rotation axis A is moved

(46) fixed bias circuit

(47) galvanometer

(48) laser beam

(49) laser

(50) stock chest

(51) elevating movement direction

(12) shaped article

(53) liquid level photocuring snap point

(54) lifting platform

(55) resin scraper plate

(56) direction of motion of scraper plate

(57) liquid level control device (or self-overflow type: from hole of overflowing)

(58) buoy displacement direction

(59) lifting platform bracket

(61) lifting platform bottom or front layer

(62) ink sublayer

(63) ink sublayer surface layer

(64) sublayer selectively solidification light

(65) resin liquid layer

(66) resin liquid layer liquid level

(67) initial liquid height

(68) printing layer-selective solidifies light

(70) spray remittance head

(71) sundries falling direction

(72) ink storage box

(73) ink-feeding tube

(74) air brushing head direction of displacement

(75) guide rail

(76) lifting platform

(77) shaped article

(78) lifting platform direction of displacement

(79) object slice to be solidified

(80) roller fixed rotating shaft

(81) roller

(82) light transmission conveyer belt

(83) curing light source

(84) solidify light

(85) spraying object slice

(86) sundries scraper plate

[most preferred embodiment]

Below in conjunction with attached drawing, with regard to preferred embodiment, the invention will be further described:

As shown in Figure 1:

General 3DP (no powdering) printer configuration schematic diagram currently on the market, the design feature of transformation of the invention is only It is to increase color in the access of multiinjector print head (1) (can be integrated, without isolated ink-feeding tube and ink storage box) Black ink storage box (6): printing type and program are different from.

Other essential structures are as follows: Z axis motor (4) drives lead screw (2) under the constraint of guiding cylinder (3) so that lifting platform (10) vertical displacement is generated, as shown in elevating movement direction (11)；The horizontal plane displacement of multiinjector print head (1) is to pass through, solely Vertical rotation fixed bias circuit (14) and movement rotation axis (13) are coordinated to generate.

Color ink ink storage box (6), molding material-storing box (7), support material-storing box (8) are printed via perfusion tube (9) towards multiinjector Head (1), respectively by backing material nozzle, colored ink nozzle, molding materials nozzle (19) spraying printing.

Lifting platform bracket (16) carries shaped article (12), and lifting platform prime coat (15) is created on lifting platform bracket (16) It carries between shaped article (12).

Ultraviolet curing lamp (20) issues solidification light (17) and irradiates per all layers, structure housing (18) and other components: such as Mechanical system, control system etc. belong to well-known technique, no longer repeat.

It is as shown in Figure 2: and

Left figure are as follows: the printing object of the colour sandwiched object of air brushing and cut layer figure, right figure are as follows: air brushing colour surface layer object is beaten It prints object and cuts layer figure.

Layer (34) is cut from left figure printing it can be seen that (31) are cutd open by enclosure wall office shows, colored shell (23) (colour sandwiched) It is wrapped up by transparent enclosure wall (27), color content (25) is expressed by the stacking of ink sublayer (22), and support structure (28) is fid Expect what nozzle spraying backing material generated；Inner body (21) can be transparent material, be also possible to non-transparent material；It is empty in object It (29) is to save material and set.

After removing support structure (28) in this way, transparent enclosure wall (27) makes the color content (25) of colored shell (23) complete Exposure, shows colour print object.

Layer (34) is cut it can be seen that (32) are cutd open by enclosure wall office shows from right figure printing, and colored shell (24) is supported enclosure wall (26) it wraps up, color content (25) is expressed by the stacking of ink sublayer (22), and support structure (28) is the spraying of backing material nozzle What backing material generated；Inner body (21) can be transparent material, be also possible to non-transparent material；Empty (29) are to save in object About material is set.

After removing support structure (28) in this way, support enclosure wall (26) is still opaque but is same with support structure (28) Material is also easily removed, so that the color content (25) of colored shell (23) (colored surface layer) is completely exposed, is also shown Colour print object.Prime coat (33) is that printing object is common means, it is therefore an objective to levelling and expanding area is secured to increase Degree.

Therefore: air brushing color table layered scheme and air brushing colour shell scheme in addition to it is above-mentioned it is different other than, another difference exists In: the material in the material-storing box A (7) of molding materials, molding materials need not be chosen for transparent material or the translucent object of light color Material is necessary condition, does not need to limit again to the color of material.

It is as shown in Figure 3:

Colored spray remittance head (41) for air brushing color inks is mounted on the vertical parallel axis fortune that can make the movement of 2 dimensional planes Dynamic circuit connector at mechanism on, they are the planner motion systems collectively constituted by movement rotation axis A (44) and fixed bias circuit (46)； Ink storage box (43) sprays remittance head (41) to colour by ink-feeding tube (42) and transmits colored (UV) ink；

Under the drive of the motor, lifting platform bracket (59) support lifting platform (54) carry shaped article (52) every time under It drops 1 and prints the height for cutting layer, form what elevating movement direction (51) was vertically oriented；To guarantee the smooth of resin liquid level Degree, the fortune of horizontal direction shown in the direction of motion (56) of the resin scraper plate (55) along scraper plate after lifting platform (54) declines every time It is dynamic, to strike off liquid level.

The liquid level control device of stock chest (50) is the driving device by floating drum (57) and control floating drum vertical height It constitutes, and forms vertical direction shown in buoy displacement direction (58), when work needs to keep the stability of liquid level.

Each layer of solidification is issued by: galvanometer (47) deflection laser (49)) laser beam (48) is according to printed matter The hierarchical model of part scans liquid level, as shown in liquid level photocuring snap point (53).

It is as shown in Figure 4:

Colour sandwiched is to cut the period between layer in the above-mentioned 2 adjacent printings of completion to complete: in lifting platform bottom Or ink sublayer (62) are established on front layer (61), the sublayer be located proximate to printing object edge, the edge be exactly future at The surface superficial part (about: 20---100 decimillimeter depth) of type object is basically the appearance that people observe the shaped article of sight Part；Thus the resin of stock chest (50) must be transparent or light；Since in the case where no side supports, ink leans on it The surface tension of itself can not support too high height, therefore generally require the laying of 2 layers or 2 layers or more of sublayer, ink The laying on layer surface layer (63) needs as being exactly, after 1 to multilayer (most 10 layers) sublayer laying, by solidification photon Layer-selective, which solidifies light (64), to carry out being scanned solidification according to the picture that colour sandwiched son cuts layer, and the cured light is necessary Cut the area of layer beyond son, carry out complete interference solidification, otherwise will strike off process will blow uncured color inks off and Pollute material pond；Lifting platform (54) declines the height that layer is cut in 1 printing, the resin liquid layer liquid level of resin liquid layer (65) later (66) top that just cured son cuts layer is submerged, while resin scraper plate (55) strikes off liquid level again；To make colour sandwiched son Cutting layer can sufficiently cover inside shaped article, need re-laying 1 sublayer on the transparent resin above sublayer to solidify, the son Layer will be wider than 1 following sublayer, due to gravity and the effect of diffusion, in the non-of the relatively short next sublayer having cured Under comprehensive support, which will be bent, and complete the following purpose for blocking sight.Then the figure being sliced according to printing object, It forms printing layer-selective and solidifies the solidification that light (68) completes this slice.It (67) is initial liquid height.

It is as shown in Figure 5:

Specific connection relationship between the device assembly: compared with stock chest bearer solution, the program eliminates stock chest, Solidify light (84) can be used noncoherent curing light source (83) carry out comprehensive illumination without selection: or laser scanning, DLP and The light source that the selective light of LCD shines；UV ink is conveyed to spray remittance head (70) by ink-feeding tube (73) from ink storage box (72), works as air brushing It, can be by roller fixed rotating shaft (80) when head move back and forth as shown in air brushing head direction of displacement (74) along guide rail (75) Color inks are sprayed out by the slice of shaped article on light transmission conveyer belt (82) under roller (81) driving of constraint, form spraying Object is sliced (85), by the transmission of light transmission conveyer belt (82), is sent to the lifting platform (76) of carrying shaped article (77) Lower section, such as shown in object to be solidified slice (79)；The lifting platform under the drive of the motor can along vertical direction upper and lower displacement, The direction as shown in lifting platform direction of displacement (78)；When needing to solidify slice, lifting platform declines the height of 1 layer of printing slice, Close on light transmission conveyer belt (82), and it is held against sprayed ink, after having carried out photocuring, lifting platform rises certain Highly, it prepares for slice solidification next time.

The spray remittance head for storing transparent and other color tree rouge materials has been drawn in the side of spray remittance head (70), they are by leading Pipe is connect with ink storage box inking, belongs to well-known technique.

The front end of sundries scraper plate (86) is close to light transmission conveyer belt (82), is the sundries for cleaning light transmission conveyer belt (82), The sundries wiped off falls direction such as: shown in sundries falling direction (71).

Claims (10)

1. the full-color shell 3D printer based on layer-by-layer photocuring, the machine are divided into: the layer-by-layer curing molding MJP type of multiple nozzle spraying or Stereolithography apparatus SLA type；Wherein the layer-by-layer curing molding MJP type structure feature of multiple nozzle spraying is: include: lifting platform, Structure housing and electronic control system；Specific connection relationship are as follows: beaten for air brushing moulding material, support and color inks multiinjector Print head is mounted in the mechanism for the vertical parallel axis movement synthesis that can make the movement of 2 dimensional planes；Make under the drive of the motor Lifting of lifting table；3 class material-storing boxs: color ink ink storage box (6), molding material-storing box (7) and support material-storing box are at least equipped in configuration (8) or at least 2 class material-storing boxs: color ink ink storage box (6), molding material-storing box (7) are needed, by the molding materials of molding material-storing box (7) Nozzle takes into account spraying building support section, and the effect of electronic control system execute instruction take it is of the invention: air brushing is color The workflow of color shell scheme or air brushing color table layered scheme, shaped article are the shaped article with full-color shell；And its Neutral body Stereolithography SLA type construction includes: that the construction feature of stock chest bearer solution is: hardware system includes storage DLP, LCD digital light projection device or laser galvanometer scanning device of hopper bearer solution；Stock chest, lifting platform, resin are scraped Plate, resin liquid level height controller, temperature control equipment and electronic control system；Or DLP, LCD of conveyer belt bearer solution Digital light projection device or laser galvanometer scanning device or noncoherent face curing light source；Lifting platform, ink air brushing component, temperature Spend control device and electronic control system；For the specific connection relationship of the printing equipment of stock chest bearer solution are as follows: for spraying Colored spray remittance head (1) for drawing color inks is mounted in the mechanism for the vertical parallel axis movement synthesis that can make the movement of 2 dimensional planes, They are the planner motion systems collectively constituted by movement rotation axis A (4) and fixed bias circuit (6)；Ink storage box (3) passes through inking It manages (2) and sprays remittance head (1) transmission color inks to colour；Under the drive of the motor, lifting platform bracket (19) supports lifting platform (14) shaped article (12) lifting, horizontal direction shown in the direction of motion (16) of the resin scraper plate (15) along scraper plate are carry Movement, the device that floating drum (17) is controlled by vertical height drive, and galvanometer (7) component and laser (9) are to be rigidly fixed in dress It sets in structural body, colored spray remittance head (1) for air brushing color inks is mounted on the vertical parallel axis that can make the movement of 2 dimensional planes In the mechanism for moving synthesis, they are the planner motion systems collectively constituted by movement rotation axis A (4) and fixed bias circuit (6)； Ink storage box (3) sprays remittance head (1) to colour by ink-feeding tube (2) and transmits colored (UV) ink；For beating for conveyer belt bearer solution The specific connection relationship that printing equipment is set are as follows: noncoherent curing light source (43) is installed in shaped article (37) by light transmission conveyer belt (42) without the opposite being isolated；It is converged head (30) by ink storage box (32) by ink-feeding tube (33) connection spray, guide rail (35) constrains air brushing Head carries out the reciprocating motion of horizontal direction, and the roller (41) of roller fixed rotating shaft (40) constraint drives light transmission conveyer belt (42) fortune Dynamic, which can be close to light transmission along vertical direction upper and lower displacement, the front end of sundries scraper plate (46) under the drive of the motor Conveyer belt (42)；Its feature is that in associated stock chest bearer solution and in associated conveyer belt bearer solution It is all the colored spray remittance device for having used color inks；And the work in associated stock chest bearer solution to shaped article Process uses.

2. the color shell object generated of the full-color shell 3D printer based on layer-by-layer photocuring, is divided into colour sandwiched object and colour Surface layer object, feature be that colour sandwiched object refer to colored shell be in a manner of colour sandwiched in conjunction with structural materials, it is whole A coloured silk shell is wrapped up by structural materials, is completely in the inside of structural materials, position can also be arranged in printing object Deep, for expressing internal structure, exposed in outermost structural materials must be transparent or translucent；Colored surface layer object Part refers to that colored shell is the entire coloured silk shell package structure material in a manner of colored surface layer in conjunction with structural materials, and structural materials are complete The full inside in colored surface layer, and colored surface layer is supported material package；Support material is finally used solvent dissolution to remove It goes, final colour surface layer is exposed to most appearance；The manufacturing method of color shell object is successively set up by the mode of air brushing colour The colour sandwiched scheme of air brushing or the full color shell color method scheme on air brushing colour surface layer realize.

3. the full-color shell 3D printer according to claim 1 based on layer-by-layer photocuring, it is characterised in that: the air brushing System is converged head by: independent ink storage box, ink-feeding tube and colored spray and is formed, or by integrated, without isolated ink-feeding tube And the Spraying-drawing apparatus of ink storage box is constituted.

4. the full-color shell 3D printer according to claim 1 based on layer-by-layer photocuring, it is characterised in that: the storing The liquid level control device of slot (10) is by floating drum (17) or to be utilized in the hole being provided on the wall at liquid level position, works as decline When lifting platform (14) is per, due to the immersion of construction package, liquid level can rise the certain altitude hole and play the role of certainly excessive, holding The height of liquid level.

5. the full-color shell 3D printer according to claim 1 based on layer-by-layer photocuring, it is characterised in that: the sublayer Quantity be object cut 2 times of layer number or 10 times of 2 times or more hereinafter, the quantity of sublayer with object to cut layer number equal.

6. the full-color shell 3D printer according to claim 1 based on layer-by-layer photocuring, it is characterised in that: the interference Solidification refers to that the area of cured light covering must cut the area of layer beyond son.

7. the full-color shell 3D printer according to claim 1 based on layer-by-layer photocuring, it is characterised in that: described to interlock Air brushing refers to: 1 sublayer is re-layed on solidifying the transparent resin above sublayer, which will be wider than 1 following sublayer Width, due to the effect that gravity and liquid are spread, which will be bent, and block internal sight thoroughly to the eye, be made It is colour sandwiched sufficiently to cover shaped article surface.

8. the full-color shell 3D printer according to claim 1 based on layer-by-layer photocuring, it is characterised in that: the storing Slot bearer solution is: resin scraper plate (15) is selective part, can be with can not have to.

9. the full-color shell 3D printer according to claim 1 based on layer-by-layer photocuring, it is characterised in that: the lifting The driving of platform, air brushing head and floating drum is electric and pneumatic or hydraulic-driven.

10. the full-color shell 3D printer according to claim 1 based on layer-by-layer photocuring, it is characterised in that: described clear The sundries of clean light transmission conveyer belt (42) is using sundries scraper plate (46) or using gas, liquid wash away, or is shaken non-contact Mode is realized.