CN103302860A - Light-curing three-dimensional printer based on digital light processing (DLP) projection - Google Patents
Light-curing three-dimensional printer based on digital light processing (DLP) projection Download PDFInfo
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- CN103302860A CN103302860A CN 201310227241 CN201310227241A CN103302860A CN 103302860 A CN103302860 A CN 103302860A CN 201310227241 CN201310227241 CN 201310227241 CN 201310227241 A CN201310227241 A CN 201310227241A CN 103302860 A CN103302860 A CN 103302860A
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Abstract
The invention discloses a light-curing three-dimensional printer based on digital light processing (DLP) projection, which comprises a computer system (2), an automatic control system, a DLP projection system (1), a molding work pool (3), a feeding system (4) and a lifting system. Compared with the three-dimensional printer in the prior art, the light-curing three-dimensional printer has the advantages of high molding speed and high printing precision, and the surface of a molded product is continuous and is not layered; moreover, the DLP projection-based light-curing three-dimensional printer can be applied to performing light curing on light-sensitive materials with various strengths and made from different raw materials.
Description
Technical field
The present invention relates to the rapid three dimensional printing forming field, relate in particular to a kind of based on DLP projection photocurable three-dimensional printer.
Background technology
3 D-printing, to design a model as source take Computerized three-dimensional, discrete and the numerical control molding system by software hierarchy, utilizing the modes such as laser beam, hot melt nozzle that the special materials such as metal dust, ceramic powders, plastics, cell tissue are successively piled up coheres, final stack moulding produces the technology of entity products.This technology is a kind of growth form manufacturing technology based on " discrete/as to pile up " thought, utilizes computer technology that threedimensional model is separated into a series of two-dimensional section figure along a direction, then according to sectional view information, successively prints and piles up moulding.In every one deck is printed, utilize accurate shower nozzle to spray bonding solution on the powder plane of completing in advance, powder in the jeting area is bondd the powder plane decline certain altitude that then will print and layer overlay powder in the above, the printing of preparing next sectional view.So circulation, successively bonding is piled up, until all sectional view Print Alls of whole threedimensional model are finished, through post processing, removes the not powder of bonding, has just formed the entity threedimensional model.
For example the patent No. is that the utility model patent of 201220076363.X discloses a kind of piezoelectric three dimension printing shaping system, this system comprises casing and support frame thereof, the X-direction motion, bearing structure, the powder chamber, 3-D view divides layer scattering mechanism, spread powder mechanism and piezoelectric type shower nozzle, wherein: described X-direction motion is installed on the support frame, comprise stepper motor, along X-direction setting and two Timing Belts being parallel to each other, and across between described parallel Timing Belt and with the joining power transmission shaft of described stepper motor, the two ends of this power transmission shaft are separately installed with synchronous pulley, drive thus the motion that the described parallel Timing Belt that is attached thereto is carried out X-direction; The both sides of described bearing structure are connected in respectively on the described parallel Timing Belt, are used for carrying described piezoelectric type shower nozzle and spread powder mechanism; Described powder chamber is arranged on and is positioned in the casing under the described bearing structure, comprises powder storing chamber and forming cavity, is respectively applied to deposit the dusty material that consists of the 3-D view entity; Described 3-D view divides layer scattering mechanism to be used for needing the 3-D view of moulding to be separated into a series of continuous two-dimensional sheet image according to certain floor height; Described shop powder mechanism is arranged on the described bearing structure and moves with its X-direction, and the floor height that divides layer scattering mechanism to set according to described 3-D view promotes to transfer to forming cavity with the dusty material of corresponding height from described powder storing chamber successively; Described piezoelectric type shower nozzle is arranged on the described bearing structure and moves with its X-direction, can move back and forth along the Y direction perpendicular to X-direction simultaneously, be used for spraying respectively solution as binding agent to the dusty material that is pushed into successively forming cavity by described shop powder mechanism, carry out thus the molding bonded to dusty material.
Finalize the design, cut with final production finished product different by machining modes such as mould, turnning and millings to raw material from traditional manufacture, 3 D-printing becomes several two dimensional surfaces with 3D solid, by material processed and successively stack are produced, greatly reduce the complexity of manufacturing.This digitlization manufacturing mode does not need complicated technique, does not need huge lathe, does not need numerous manpowers, directly just can generate the part of any shape from computer graphics data, makes to manufacture to be able to extend to wider production crowd scope.Yet three-dimensional printer of the prior art, major defect are that external surface of objects layering sense is fairly obvious, and precision is low, and shaping speed is slow.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of three-dimensional printer of being combined with photo-curing material based on DLP shadow casting technique, can guarantee that shaped article can reach effective transition between layers, the surface does not have the layering sense continuously, the thinnest 0.2mm that reaches of bed thickness, and shaping speed is very fast.
For addressing the above problem, the present invention a kind ofly is characterized in that based on DLP projection photocurable three-dimensional printer, comprising:
Computer system for the treatment of threedimensional model, is divided into a series of sectional views with thickness with the threedimensional model order;
Automatic control system, link to each other with feeding system, jacking system and DLP optical projection system respectively, shine for the liquid level of control DLP optical projection system to optic-solidified adhesive in the shaping work pond, and the control jacking system drives the moulding work pool or optical projection system is done lifting moving, and the control feeding system is supplied optic-solidified adhesive in the shaping work pond;
The DLP optical projection system links to each other with computer system, and the sectional view that is used for computer system is partitioned into is projected to the shaping work pond;
The shaping work pond links to each other with feeding system, holds optic-solidified adhesive;
Jacking system is used for adjusting the distance between the optic-solidified adhesive liquid level in DLP optical projection system and the shaping work pond;
Feeding system is used for supplying optic-solidified adhesive in the shaping work pond.
Described DLP optical projection system comprises light source, DMD and bright dipping camera lens, and wherein said light source is the ultraviolet light source of wavelength 200～400nm and the royal purple light source of wavelength 400～450nm.
Described feeding system comprises magnetic valve and reinforced shower nozzle and is used for the liquid level sensor of feedback, and described shaping work pond links to each other with a material pond by magnetic valve, liquid level sensor with current liquid level feedback in described automatic control system.
Described jacking system links to each other with the shaping work pond, is used for adjusting the distance between the optic-solidified adhesive liquid level in DLP optical projection system and the shaping work pond;
Described jacking system links to each other with the DLP optical projection system, is used for driving the DLP optical projection system and carries out lifting moving.
Described automatic control system is PC.
Of the present invention based on DLP projection photocurable three-dimensional printer, compare with three-dimensional printer of the prior art, have a shaping speed fast, the advantage that printing precision is high, and the product surface of moulding is continuous, without lamination; Go for the light-sensitive material of various intensity and unlike material is carried out Stereolithography.
Description of drawings
Fig. 1 is the structural representation based on DLP projection photocurable three-dimensional printer of the present invention.
Among the figure: DLP optical projection system 1; Computer system 2; Shaping work pond 3; Feeding system 4; Material pond 5; Jacking system 6; Light source 101; DMD102; Light microscopic head 103; Motor 601; Leading screw 602
The specific embodiment
In order to make those skilled in the art person understand better technical solution of the present invention, the present invention is described in further detail below in conjunction with drawings and embodiments.
Of the present invention a kind of based on DLP projection photocurable three-dimensional printer, comprising: computer system, automatic control system, DLP optical projection system, shaping work pond, feeding system and jacking system.
Wherein, described computer system is divided into a series of sectional views with thickness for the treatment of threedimensional model with the threedimensional model order;
Described automatic control system can be PC, link to each other with feeding system, jacking system and DLP optical projection system respectively, shine for the liquid level of control DLP optical projection system to optic-solidified adhesive in the shaping work pond, and control jacking system driving moulding work pool and do lifting moving, and the control feeding system is supplied optic-solidified adhesive in the shaping work pond.
As shown in Figure 1, described DLP optical projection system 1 links to each other with computer system 2, and the sectional view that is used for computer system 2 is partitioned into is projected to shaping work pond 3; This DLP optical projection system comprises light source 101, DMD102 and bright dipping camera lens 103.
The DLP projection is a more advanced and ripe shadow casting technique, and DLP is the abbreviation of " Digital Light Procession ", is digital light and processes, and that is to say that this technology is first the digital processing of signal of video signal process, and then light is projected.It is based on TI(Texas Instruments) digital micromirror elements---the DMD(Digital Micromirror Device of company exploitation) finish the technology that viewable numbers information shows.
In the present invention, by computer the 3D model is processed, formed the profile of two dimension, be transferred to core component DMD among the DLP by data wire, produce with computer same pattern among the DMD this moment.
Wavelength is fixed the irradiation of angle to DMD at the royal purple light source of the ultraviolet light source of 200nm～400nm or wavelength 400～450nm, then reverberation sees through lens on light and carries out shaping, thus working face formed with computer in the duplicate ultraviolet pattern of pattern.
Described shaping work pond 3 links to each other with feeding system 4, is used for holding optic-solidified adhesive.The liquid level sensor that described feeding system 4 comprises magnetic valve and reinforced shower nozzle and is used for feeding back, described shaping work pond 3 links to each other with a material pond 5 by magnetic valve, and liquid level sensor is arranged in the described shaping work pond.
Optic-solidified adhesive, also be UV glue, a kind of resin that solidifies that causes under ultraviolet ray irradiation is made of prepolymer, activated monomer and ultraviolet initator, has an effect and then makes the further polymerization of prepolymer form large molecule (solid) and solidify at the ultraviolet irradiation light trigger.
By feeding system to adding one deck glue in the shaping work pond, after the ultraviolet ray irradiation that DMD reflects back, this layer glue begins to begin to solidify according to the shape of ultraviolet pattern, finally forms the duplicate one deck solid of this cross section pattern in one deck and the model, and the place that does not shine still is liquid.
Described jacking system 6 links to each other with shaping work pond 3, is used for driving the lifting moving of moulding work pool 3.This jacking system 6 is motor leading screw transfer system, and this motor leading screw transfer system comprises motor 601, and the clutch end of motor 601 links to each other with a leading screw 602 that vertically arranges, and is provided with feed screw nut on the leading screw 602, and shaping work pond 3 fixes with feed screw nut.
After finishing one deck curing in the moulding work pool, central control system control magnetic valve is opened, reinforced in trend shaping work pond, and the shaping work pond under the drive of jacking system to the decline certain altitude, the height that descends is just the same with the thickness of that layer glue that has just solidified, thereby enter the processing step that lower one deck solidifies, until finish whole moulding process.
Certainly, in the situation that the shaping work pond is larger, directly lifting shaping work pond is comparatively difficult, therefore described jacking system also can link to each other with DLP optical projection system 1, be used for driving DLP optical projection system 1 and carry out lifting moving, thereby adjust the distance between the optic-solidified adhesive liquid level in DLP optical projection system and the shaping work pond.
Claims (6)
1. one kind based on DLP projection photocurable three-dimensional printer, it is characterized in that, comprising:
Computer system (2) for the treatment of threedimensional model, is divided into a series of sectional views with thickness with the threedimensional model order;
Automatic control system, link to each other with feeding system, jacking system and DLP optical projection system respectively, shine for the liquid level of control DLP optical projection system to optic-solidified adhesive in the shaping work pond, and the control jacking system drives the moulding work pool or optical projection system is done lifting moving, and the control feeding system is supplied optic-solidified adhesive in the shaping work pond;
DLP optical projection system (1) links to each other with computer system, and the sectional view that is used for computer system is partitioned into is projected to the shaping work pond;
Shaping work pond (3) links to each other with feeding system, holds optic-solidified adhesive;
Jacking system is used for adjusting the distance between the optic-solidified adhesive liquid level in DLP optical projection system and the shaping work pond;
Feeding system (4) is used for supplying optic-solidified adhesive in the shaping work pond.
2. as claimed in claim 1 based on DLP projection photocurable three-dimensional printer, it is characterized in that, described DLP optical projection system (1) comprises light source (101), DMD(102) and bright dipping camera lens (103), wherein said light source is the ultraviolet light source of wavelength 200～400nm and the royal purple light source of wavelength 400～450nm.
3. as claimed in claim 1 based on DLP projection photocurable three-dimensional printer, it is characterized in that, described feeding system (4) comprises magnetic valve and reinforced shower nozzle and is used for the liquid level sensor of feedback, described shaping work pond (3) links to each other with a material pond (5) by magnetic valve, liquid level sensor with current liquid level feedback in described automatic control system.
4. as claimed in claim 1ly it is characterized in that based on DLP projection photocurable three-dimensional printer, described jacking system links to each other with the shaping work pond, is used for adjusting the distance between the optic-solidified adhesive liquid level in DLP optical projection system and the shaping work pond.
5. as claimed in claim 1ly it is characterized in that based on DLP projection photocurable three-dimensional printer, described jacking system links to each other with the DLP optical projection system, is used for driving the DLP optical projection system and carries out lifting moving.
6. as claimed in claim 1ly it is characterized in that based on DLP projection photocurable three-dimensional printer, described automatic control system is PC.
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Application publication date: 20130918 |