A kind of colour 3D printing device and Method of printingTechnical field
The present invention relates to 3D printing technique, especially relate to a kind of colour 3D printing device and Method of printing.
Background technology
The object that 3D printer on the market prints now only has a kind of color, or several different colours materialCombination, tint to process by the surface in later stage again after the completion of printing and realize the object finally wanted, most of painted using manualWay, batch production when surface colouring at comprehend there is a problem of inconsistent.
Publication No. CN103434135A Chinese invention patent application《A kind of colour 3D printer and its prepare three-dimensional articleMethod》Disclose a kind of colour 3D printer, the color printing as needed, using premixed device to red, yellow, blue three chromoresinsThen mixed resin is printed by the color required for being mixed to form, the final 3D product obtaining colour.ButIt is that the program has problems with：The color needing each pixel of product printing all may be different, therefore, entirely printProcess needs continuous turn colors, and the glue amount required for single pixel point is very little, is printed by the way of premixingIt is difficult to realize switching between different colors, and it is difficult to ensure that the glue of a front color does not have in premixerRemain and affect the effect of a rear color.
Content of the invention
The technical problem to be solved is：There is provided a kind of colour 3D printing device and Method of printing, for realizingHigher-quality 3D printing.
The technical problem of the present invention is solved by following means：
A kind of colour 3D printing device, including fuse stack 3D printing system, for successively printing to form 3D product；
Also include toning system, described toning system is used for often having printed one layer in described fuse stack 3D printing systemAfter Rotating fields, the appearance of described Rotating fields is painted；
Described toning system include paint-spraying head, pigment solidified cell, paint-spraying head Locating driver unit, color control unit andMultiple paint supply units；
Described paint-spraying head includes multiple spouts with described paint supply element number identical, described spout and described pigmentFeeding unit is connected correspondingly；
Described paint-spraying head Locating driver unit is used for driving described paint-spraying head to move along the appearance of described Rotating fields；
Described color control unit is used for receiving the appearance color data of the described Rotating fields of each layer, and according to described outward appearanceFace color data controls described paint supply unit, with control each described spout the appearance in described Rotating fields eachThe pigment quantity for spray of pixel；
Described paint-spraying head is used for being sprayed at the pigment from the plurality of paint supply unit by the plurality of spoutThe appearance of described Rotating fields；
Described pigment solidified cell is used for solidification and is sprayed at the pigment in the appearance of described Rotating fields.
Compared with prior art, the colored 3D printing device of the present invention, stacks the Rotating fields of shaped article, so by fuseAppearance Color data according to Rotating fields afterwards, carries out color coating spraying, solidification thus ultimately forming product to every structure layer by layerComplete coloured appearance.Had more using carrying out the manual technology painted, colouring quality after the completion of printing with respect to prior artGood concordance；And due to being successively to paint, be not in the dead angle that cannot paint；Colouring adopts multi-port shower nozzle, every timeSpraying can form a pixel, need not carry out premixing to pigment, therefore, there is also the front color spray existing for premixingThe problem of a color spray effect after pigment remaining influence, can accurately realize color spraying.
Preferably：Described paint-spraying head includes three shower nozzles, and described toning system includes three paint supply units；Or instituteState paint-spraying head and include four shower nozzles, described toning system includes four paint supply units, one of paint supply unit is usedIn supply black pigment.The scheme of three shower nozzles can form full-color spraying by spraying red, yellow, blue three-color pigment, and fourThe scheme of shower nozzle can increase blacking on the basis of three shower nozzles, for the spraying of black portions.
Preferably：The bore of described spout is 25 μm -35 μm.Distance between spout is preferably smaller than 0.07mm.
Preferably：Described color control unit includes color analysis module and paint supply unit control module, described faceColour analysiss module is used for receiving the appearance color data of described Rotating fields, and described appearance color data is parsed withObtain the pigment quantity for spray data required for each pixel being formed corresponding to this appearance color data；Described paint supplyUnit control module is for the pigment quantity for spray data according to required for each pixel described to paint supply list each describedThe switch valve of unit is controlled.
Preferably：Described fuse stack 3D printing system includes workbench and its driver element, the X of Z-direction movementThe fuse printhead of axle and Y direction movement and its driver element and the wire tray for supplying silk to described fuse printhead.
Preferably：Described paint-spraying head is fixedly connected with described fuse printhead；Described toning system is printed with described fuseThe driver element of head is as described paint-spraying head Locating driver unit.This preferred version passes through to the multiplexing printing head drive unit,The complexity of structure, reduces cost can be reduced.
Preferably：There is microcellular structure so that being sprayed at institute in the silk that described fuse stack 3D printing system is adoptedState the pigment in the appearance of Rotating fields can partly penetrate in described Rotating fields.This preferred version is using having microcellular structureSilk so that pigment can partial penetration to Rotating fields inside so that the color of product have extraordinary anti-scratchWipe performance.
A kind of colour 3D printing method, for successively printing each Rotating fields of 3D product to form 3D product, including withLower step：
S1, the model of a layered structure data reading current Rotating fields and appearance color data；
S2, carry out fuse according to described model of a layered structure data and print forming current Rotating fields；
S3, according to described appearance color data, obtain required for each pixel in the appearance of current Rotating fieldsThe quantity for spray of each pigment, and each pigment of corresponding quantity for spray is sprayed at each described pixel；
S4, the pigment to spraying in the appearance of described Rotating fields solidify；
S5, repeat step S1-S4 complete to printing.
Preferably：In described step S2, fuse prints adopted silk is the silk with microcellular structure.
Preferably：Described pigment employed in described step S3 is UV ink.
Compared with prior art, the method for the present invention adopt successively colouring scheme, equally have colouring quality good, productConforming advantage.Preferred version can form the interpenetrative color layers with Rotating fields material using the silk of microcellular structure,Can effectively prevent scraping from fading；Preferred version adopts UV ink, can have raising product by the UV ink formation of high rigidity hardThe color layers of degree, in the case of being especially the cooperation of microcellular structure silk, can enough be greatly improved the hardness of product.
Brief description
Fig. 1 is the structural representation of the toning system of colored 3D printing device of the present invention；
Fig. 2 is the spout structure schematic diagram of the three spout paint-spraying heads of the present invention；
Fig. 3 is the spout structure schematic diagram of the four spout paint-spraying heads of the present invention；
Fig. 4 is the structural representation of the colored 3D printing device of the specific embodiment of the invention 1；
Fig. 5 is the structural representation of the colored 3D printing device of the specific embodiment of the invention 2.
Specific embodiment
With reference to preferred embodiment the invention will be further described.
A kind of colour 3D printing device, including fuse stack 3D printing system and toning system.
Fuse stack 3D printing system, for each structure layer by layer of successively printed product, thus ultimately form needs beatThe 3D product of print.Fuse stacks, and is fusion sediment rapid shaping (FDM) or fuse deposition, it is by thread heat-fusible materials again(silk hereinafter) heating and melting, by the shower nozzle with a minute nozzle squeeze spray, be deposited on print job deck plate orThe structure from level to level of 3D product is formed on the cured material of person's preceding layer, temperature starts after being less than solidification temperature to solidify, and passes throughThe layer upon layer of material forms final finished.Preferably in scheme, fuse stack 3D printing system includes Z-direction movementThe fuse printhead of workbench and its driver element, X-axis and Y direction movement and its driver element and for beating to described fusePrint head supplies the wire tray of silk.
The present embodiment, on the basis of fuse stack 3D printing system, increased toning system, in described fuseStack 3D printing system has often printed from level to level after structure, and the appearance of described Rotating fields is painted.
As shown in figure 1, the toning system 100 of the present embodiment includes：Paint-spraying head 110, pigment solidified cell 120, paint-spraying headLocating driver unit 130, color control unit 140 and multiple paint supply unit 150.
Paint-spraying head 110 includes multiple spouts 111, spout 111 and paint supply with paint supply unit 150 quantity identicalUnit 150 is connected correspondingly, and each spout 111 is respectively used to spray the pigment of paint supply unit 150 supply, oftenIndividual paint supply unit 150 is used for conveying pigment to a spout 111；In order to realize shades of colour, spout 111 and paint supplyUnit 150 can comprise three or four respectively, if adopting four, one of them is used for spray black pigment, the other threeIt is respectively used to spraying redness, green and blue pigment, and when adopting three, then be respectively used to spray red, green and blue faceMaterial.Fig. 2 show the structural representation of the preferred version of the paint-spraying head using three spouts, three spout 111 circumscribed arrangements two-by-twoBecome triangular shape, Fig. 3 show the structural representation of the preferred version of the paint-spraying head using four spouts, and four spouts 111 are arranged inQuadrilateral shape, adjacent spout is mutually circumscribed.For effect of realizing preferably painting, preferably smaller than 35 μm of the bore of described spout, allusion quotationType bore can adopt 25-35 μm, and spout spacing is more preferably less than 0.07mm.
Paint-spraying head Locating driver unit 130 is used for driving paint-spraying head 110 to move along the appearance of Rotating fields 001, fromAnd position paint-spraying head 110 and color spray is carried out to each appearance of Rotating fields 001.Appearance described in the present invention refers to 3D product energyThe position being enough seen is it is however generally that be the circumferential position of every structure layer by layer.Paint-spraying head Locating driver unit 130 can be independent of beatingThe driver element of print head, but preferably partly or entirely it is multiplexed the driver element of printhead.
Color control unit 140 is used for receiving the appearance color data of the described Rotating fields of each layer, and according to described outward appearanceFace color data controls described paint supply unit, with control each described spout the appearance in described Rotating fields eachThe pigment quantity for spray of pixel.Preferably in scheme, color control unit 140 includes color analysis module and paint supply unitControl module, described color analysis module is used for receiving the appearance color data of described Rotating fields, and to described outward appearance faceChromatic number evidence is parsed to obtain the pigment quantity for spray required for each pixel being formed corresponding to this appearance color dataData；Described paint supply unit control module is for the pigment quantity for spray data according to required for each pixel described to eachThe switch valve of individual described paint supply unit is controlled.By the analysis to outward appearance face chromatic number evidence, outward appearance can be extractedThe color of each pixel of face, then obtains obtaining pigment type and the spraying spraying this color needs according to this color analysisAmount, pigment units feeding unit control module controls each pigment according to analysis result when spraying to each pixelSwitch valve so that control the quantity for spray of each pigment.
Described pigment solidified cell 120 is used for solidification and is sprayed at the pigment in the appearance of described Rotating fields.Pigment solidifiesUnit 120 can be selected according to the species of pigment, for example：If pigment used paints admittedly for UV light, uviol lamp may be selectedAs pigment solidified cell 120；And if pigment used is thermosetting ink, then can be solidified single as pigment using heaterUnit, such as infrared lamp.
The present embodiment also provides the Method of printing of aforementioned colour 3D printing device, for successively printing each layer of 3D productTo form 3D product, it comprises the following steps structure：
S1, the model of a layered structure data reading current Rotating fields and appearance color data；Model of a layered structure data is used forFor fuse 3D printing system, successively print Rotating fields.
S2, carry out fuse according to described model of a layered structure data and print forming current Rotating fields.In this step, fuse is beatenPrint the silk that adopted silk preferably has microcellular structure, this microcellular structure can be, but not limited to by the matrix to silkAdd in material and there is the other materials of microcellular structure and produce, for example：Plaster powder materials are participated in ABS substrate.
S3, according to described appearance color data, obtain required for each pixel in the appearance of current Rotating fieldsThe quantity for spray of each pigment, and each pigment of corresponding quantity for spray is sprayed at each described pixel.Employed in this stepDescribed pigment be preferably UV ink.
S4, the pigment to spraying in the appearance of described Rotating fields solidify；
S5, repeat step S1-S4 complete to printing.
For being illustrated to the solution of the present invention further, illustrate below in conjunction with more preferred specific embodiment：
Embodiment 1
As shown in figure 4, the colored 3D printer of the present embodiment, including frame 300, fuse stacking be 3D printing system and onColour system is united.
Fuse stacks 3D printing system and includes the workbench of Z-direction movement and its driver element, X-axis and Y direction movementFuse printhead and its driver element,
The workbench of Z-direction movement and its driver element include heating station 210, the platform 211 of Z-direction movement and Z-direction and watchTake motor 212, heating station 210 is arranged on the platform 211 of Z-direction movement, Z-direction servomotor 212 passes through Z-direction gear unit213 are moved up and down along frame with the transmission of Z-direction mobile platform, the platform 211 for driving Z-direction movement.
The fuse printhead of X-axis and Y direction movement and its driver element, it includes fuse printhead 220, X-axis guidingPost 221, X are to servomotor 222, Y-axis lead 223, Y-direction servomotor 224, X-axis gear unit 225 and Y-axis gear unit226, X-axis lead 221 and Y-axis lead 223 are located at the top of heating station 210, and fuse printhead 220 is slidably pacifiedIt is contained on X-axis lead 221, X-axis lead 221 is slidably mounted on Y-axis lead 223；X leads to servomotor 222Cross X-axis gear unit 225 to be connected with fuse printhead 220 to drive fuse printhead 220 along X-axis by X-axis gear unit 225Lead moves；Y-direction servomotor 224 is connected single by Y-axis transmission by Y-axis gear unit 226 with X-axis lead 221Unit 226 drives X-axis lead 221 mobile along Y-axis lead 223, so that fuse printhead 220 can be in X-axis and Y-axis sideMove up and carry out fuse printing.
Wire tray 230 is used for supplying printing silk to fuse printhead 220.
The toning system of the present embodiment adopts the toning system in embodiment illustrated in fig. 1, and it illustrates and refers to aboveDescription.As shown in figure 4, the paint-spraying head 110 of the toning system of the present embodiment is connected to printhead 220 by a contiguous block 113Together, paint-spraying head 110 and printhead 220 are all slidably mounted on X-axis lead 221 by contiguous block 113.By soSetting, paint-spraying head 110 can all be multiplexed the driver element of printhead 220, print in printhead 220 and complete structure from level to levelAfterwards, moved using the driver element drive connection block 113 of printhead to carry out painting using paint-spraying head.
Embodiment 2
As shown in figure 5, the present embodiment and embodiment 1 differ only in paint-spraying head Locating driver unit, the present embodimentPaint-spraying head Locating driver unit only shares Y-axis lead 223, paint-spraying head Locating driver list with the driver element of printhead 220Unit adopts X-axis lead, X-axis gear unit and the Y-axis gear unit of the driver element independent of printhead 220, for exempting to repeat,Hereafter it is described mainly for the difference with embodiment 1, structure division same as Example 1 can be found in embodiment 1Description.As shown in figure 5, reference 221,225,226 is respectively the X-axis lead of driver element of printhead, X-axis transmissionUnit and Y-axis gear unit, and reference 131,135,136 is respectively the X-axis lead of paint-spraying head Locating driver unit, XThrough-drive unit and Y-axis gear unit, paint-spraying head X passes through X-axis gear unit 135 and paint-spraying head transmission, spray to servomotor 138Color head Y-direction servomotor 224 is passed through Y-axis gear unit and is driven with X-axis lead, thus by the X of two paint-spraying heads to servoMovement in X, Y direction for the paint-spraying head 110 realized by motor 138 and Y-direction servomotor 224.
The present embodiment compared with Example 1, can make paint-spraying head separate with printhead, have single driver element during workDrive such that it is able to reduce the impact to paint-spraying head for the printhead high temperature.
Above content is to further describe it is impossible to assert with reference to specific preferred implementation is made for the present inventionBeing embodied as of the present invention is confined to these explanations.For those skilled in the art, do not taking offOn the premise of present inventive concept, some equivalent substitutes or obvious modification can also be made, and performance or purposes are identical, all answerWhen being considered as belonging to protection scope of the present invention.