A kind of colored 3D print system based on 3DP and photocuring technologyTechnical field
The invention belongs to 3D and print field, be specifically related to a kind of colored 3D print system based on 3DP and photocuring technology.
Background technology
The one of 3D printing and RP technique, it is based on a kind of mathematical model file, uses powder, filamentary material, liquid curable material, is carried out the technology of constructed object by the mode successively printed.It is a kind of increasing material manufacturing technology that 3D prints, and superposes and obtain final product after being cut into slices by 3D solid by layer section of outline after being shaped from level to level
Comparatively the 3D printing technique of main flow comprises at present: fusion sediment rapid shaping (Fused Deposition Modeling, FDM), Stereolithography (Stereolithigraphy Apparatus, SLA), three-dimensional powder adhesion type (Three Dimensional Printing and Gluing, 3DP), selective laser sintering type (Selecting Laser Sintering, SLS) etc.
FDM printer is succeeded in developing in 1988 by American scholar Scott Crump.The material of FDM is generally thermoplastic, as wax, ABS, nylon etc.With thread feed, material in shower nozzle by heat fused.Shower nozzle is along product cross section profile and fill orbiting motion, is extruded by the material of fusing, material quick solidification simultaneously, and with the condensation of materials of surrounding, form final finished by the accumulation layer by layer of material.The frame for movement of FDM is the simplest, and cost is also minimum, and printing precision is poor, is to make technology with the most use in the desktop level 3D printer of family expenses
Photocuring technology (SLA) take photosensitive resin as raw material, control laser by computer and carry out point by point scanning by each layering cross section information of part on the photosensitive resin surface of liquid state, produced photopolymerization reaction by the thin resin layer of scanning area and solidify, forming a thin layer of part.After one deck has solidified, workbench moves down the distance of a thickness, then applies the new liquid resin of one deck again, until obtain three-dimensional entity model at the resin surface be originally cured.The method shaping speed is fast, and automaticity is high, and can be shaped any complicated shape, and dimensional accuracy is high, is mainly used in complexity, high-precision delicate workpieces rapid shaping
The 3D printer of 3DP technology is adopted to use standard ink jet inks printing technique, by liquid union body is laid on powder thin layer, each parts are successively created in the mode printing cross-sectional data, create three-dimensional entity model, the advantage adopting this technology to print is that shaping speed is fast, without the need to supporting construction, and can export colour print product.But its product surface made is fine and smooth not, and precision is relatively poor
Selective laser sintering (SLS) technique is proposed by Texas ,Usa university, develops business forming machine in 1992.SLS precinct laser sintering technology is by spreading one deck dusty material (metal dust or non-metal powder) on the table in advance, then laser is allowed to sinter solid section powder according to interface profile information under the control of the computer, then constantly circulate, pile up shaping layer by layer.The advantage of SLS technology is the making being final metal product, is mainly used in foundry industry quickly making mould.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of colored 3D print system based on 3DP and photocuring technology and preparing the method for color three dimension goods.Use the multiple colourama curing resin material of standard ink jet inks method (3DP technology) print on demand, high accuracy can print color three dimension goods.Both solved current three-dimensional powder bonding method and made the problem that coloured prod surface is fine and smooth not, intensity is more weak, and full color 3D can have been realized again and print.
The technical solution adopted in the present invention is as follows:
A kind of colored 3D print system based on 3DP and photocuring technology, as shown in Figure 1, comprise main cartridge (1), ink feed conduits (2), secondary cartridge (3), printing head support part (4), ink jet-print head (5), cut roller (6), print platform (7), pedestal (8), ultraviolet light source (9); Wherein at least one shower nozzle, at least one ultraviolet light source, print platform that at least one can be elevated, at least one road ink-feed channel
Described printing head support part installs 6 piezoelectric ink jet printing heads, the corresponding cyan of difference (C), carmetta (M), yellow (Y), black (K), white (W) five kinds of color UV resin inks and the backing material that can dissolve by water or alcohol organic solvent, each shower nozzle can have as many as 1024 nozzles to work simultaneously, improves print speed.By computer, color three dimension computer model is carried out slicing delamination, obtain the colouring information of all pixels of every one deck and required supporting information, carry out data processing according to the resolution ratio of image and selected print resolution, the data after process are delivered to the print buffer of Print Control mainboard in batches.Print Control mainboard mainboard is by each nozzle of print buffer data correlation to each printhead
Described printing head support part can move in X, Y both direction
Described printing head support part installs 2 ultraviolet light sources, is used for UV curing ink
Described printing head support part installs heating element heater, is used for heating UV ink, regulates ink viscosity
Described printing head support part is installed and cuts roller, rotational roller installs blade, cut roller bottom surface 1mm lower than the nozzle face of shower nozzle.The different UV resin material coefficients of expansion is different, and in order to keep the accuracy printing thickness, often print certain number of plies (generally thickness 10 ~ 20 microns), print platform rises, and allows cutting roller excise the moulding material had more
Described printing head support part installs 6 secondary cartridges, and each secondary cartridge two ends connect main cartridge and printhead respectively, install liquid level sensor and baroceptor in secondary cartridge.Ink feeding system regulates ink level and the negative pressure keeping ink meniscus in secondary cartridge automatically, and ensure in print procedure constantly black, ink can not flow automatically and ooze out from nozzle simultaneously
Described main cartridge totally 6, respectively to 6 secondary cartridge ink supply
Described print platform can be elevated, and is used for carrying 3 D-printing and prepares part.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described
Concrete enforcement 1
The colored 3D printer that the present embodiment relates to as shown in Figure 1, printing head support part (4) is equipped with 6 piezoelectric type standard ink jet inks printing heads (5), 6 shower nozzles these 5 kinds of color UV resin inks of corresponding C, M, Y, K, W and UV resin support ink respectively, printing type is scan mode.Upper installation 2 the LED ultraviolet sources (9) of printing head support part (4), in the installation place of each shower nozzle, heating element heater is housed, there is temperature element at the ink entry place of shower nozzle.In X-direction, grating scale is installed, is used as the measuring cell that Full-closed servo controls.Main cartridge (1) is each shower nozzle supply corresponding color of convenient pressure and the ink of function, installs B/P EGR Back Pressure Transducer EGR and liquid level sensor in secondary cartridge (3).Printing head support part (4) is also installed one and cut roller (6), be used for carrying out actual layer thickness control to printing layer unit.Pedestal (8) has a print platform that can be elevated (7), is used for carrying 3 D-printing and prepares part
Comprise the steps: when preparing three-dimensional colour goods
A, set up three-dimensional body computer model, slicing delamination is carried out to it, obtain the colouring information of all pixels of every one deck and required supporting information, carry out data processing according to the resolution ratio of image and selected print resolution, the data after process are delivered to the print buffer of Print Control mainboard in batches;
B, printing mainboard control three axles and reset, and control to adjust, until be stabilized in settings printhead ink feed temperature, ink delivery pressure;
C, print mainboard by print buffer data correlation to each printhead, in units of pass, demarcate each some X-axis coordinate, deliver to 6 printhead drive plates respectively;
D, printhead drive plate control the whether ink-jet of printhead top nozzle according to the type information accepted.The position of printhead movement is by optical grating ruler measurement and feed back to Print Control mainboard.The installation deviation of each printhead compensates in upper computer software;
E, printhead are after X-axis particles prints a pass, and printing head support part moves forward a pass distance in the Y direction.Printer continues next pass and prints, and and so forth, until all pass of current layer have printed, printing head support part gets back to the printing starting point of lower one deck;
F, print platform decline in Z-direction and print thickness accordingly, prepare lower one deck and print;
In g, print procedure, the LED ultraviolet source of jet head sets both sides works always, in order to solidify the UV ink that shower nozzle ejects;
H, when the printing number of plies reaches settings in upper computer software, cut roller rolled and cut, control the actual precision printing thickness;
I, so to circulate, until printed all section numbers of plies;
J, the part of preparing printed is soaked 3 minutes in water, then rinse, dispose backing material, just obtain colored three-dimensional body.
accompanying drawing illustrates:fig. 1 is colored 3D print system schematic diagram.