CN206085666U - High -speed continuous light solidification 3D printing device - Google Patents
High -speed continuous light solidification 3D printing device Download PDFInfo
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- CN206085666U CN206085666U CN201621169565.3U CN201621169565U CN206085666U CN 206085666 U CN206085666 U CN 206085666U CN 201621169565 U CN201621169565 U CN 201621169565U CN 206085666 U CN206085666 U CN 206085666U
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- window box
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Abstract
The utility model discloses a high -speed continuous light solidification 3D printing device, include: machine case body, quick -witted case body is divided into cavity and lower cavity by intermediate bottom, the cavity is equipped with the formation of image module down, goes up the cavity and is equipped with window box and oxygen suppliment refrigerating module, and window box and oxygen suppliment cooling -Modular fixed mounting are on intermediate bottom, and the oxygen suppliment cooling module setting be in under the window box, the formation of image module setting be in under the window box, be equipped with print platform directly over the window box, print platform installs on Z is to the workstation, the window box is connected with raw materials supply unit, the utility model discloses having combined the supplementary three's that exerts pressure of compound oxygen -enriched membrane, oxygen suppliment cooling, liquid level of window box advantage, having realized low cost, the high -efficient continuous printing of jumbo size, arbitrary shape finished piece, it is extensive to be suitable for the material, print's precision and high quality, and the uniformity is good, and technology is reliable and stable. For printing, high -speed continuous light solidification 3D provides an industrial grade solution.
Description
Technical field
The utility model is related to increasing material manufacturing and 3D printing technique field, and in particular to a kind of high-speed and continuous photocuring 3D beats
Printing equipment is put.
Background technology
Optical soliton interaction is a kind of earliest, most ripe at this stage, most widely used increasing material manufacturing (3D printing) skill of development
Art, through the development of nearly 30 years, from initial stereolithography apparatus (Stereolithography, SL), develops perhaps
More new technique, such as micro- stereolithography (Microstereolithography), integral microstereolithography technology
(Integral SL, Projection Microstereolithography), digital light process (Digital Light
Processing, DLP) 3D printing, continuous liquid level growth (Continuous Liquid Interface Production,
CLIP), two-photon polymerized laser direct-writing 3D printing etc..
Traditional stereolithography apparatus are, using laser galvanometer or mask technical controlling light area, to make resin exist
Successively solidify in controllable light area, by successively solidify superposition after generate three-dimensional entity model.But this point by point scanning light
Curing mode has following deficiency：Low (about 8～the 12x 10 of forming efficiency4mm3/h)；There is larger contraction during solidification, workpiece is produced
Raw buckling deformation.Tend under ripe background in the development of point by point scanning photocuring technology, based on the optical soliton interaction that surface layer shapes
Technology is arisen at the historic moment, and the face shaping photocuring technology of main flow mainly has：The face battle array exposure curing skill of (DLP) is processed based on digital light
Art and continuous number light process 3D printing (continuous photocuring 3D printing).Continuous photocuring 3D printing is occur in recent years a kind of non-
Normal important increasing material manufacturing new technology, especially continuous liquid level growth CLIP technologies are to be opened by Carbon3D companies of the U.S. for 2015
A kind of subversive 3D printing new technology sent out, the general principle of CLIP：Using the effect of oxygen inhibition, oxygen through window with
The contact of resin bottom liquid level, formed one layer thin can not be and purple by the region of ultra-violet curing, referred to as " dead band " (Dead Zone)
Outside line still can be transmitted through dead band, up continue to produce polymerization, while avoiding the resin and bottom window of solidification
The adhesion of mouth.Ultraviolet Continuous irradiation resin, print platform is also continuous rising, realizes continuous printing.CLIP technologies consolidate light
Change print procedure and be changed into continuous printing from lamination printing, this brings the unique and significant advantage of three aspects：(1) it is efficient, than
Traditional 3D printer wants fast 25-100 times, and the potentiality to 1000 times are improved in theory；(2) it is high-precision, in high precision with high surface
Quality, it is to avoid the step effect of traditional 3D printing, can be infinitely fine and smooth on lift height, realizes being printed without layering；(3) high property
Can, traditional 3D printing part is because layer structure, and its mechanical characteristic is different in all directions, particularly in the direction of stacking
On, anti-shear performance is very poor, and the mechanical characteristic of parts that CLIP is printed is consistent in all directions, improve performance and
Expand range of application.
3D printing equipment based on CLIP is to hold liquid photosensitive resin from traditional the different of uv equipment maximum
Print window (reservoir).Traditional face exposure 3D printer take the high transparent glass for coating mould release membrance as the bottom for holding resin device
Portion's window, and it is bottom that the Teflon material (Teflon AF) with oxygen flow and saturating ultra violet light resistance energy is employed in CLIP technologies
Portion's window.Oxygen immerses liquid photosensitive resin through window, and due to the presence of oxygen inhibition, window surface can form certain thickness
The not consolidation zone of degree (tens microns), so that resin solidification occurs on print window, printing part will not be with bottom land
Window adhesion, so as to realize that high-speed and continuous are printed.But CLIP techniques face some shortcomings and limitation：
(1) oxygen flow for being used and the price of saturating ultraviolet light Teflon material are very expensive, and need special manufacture
Technique.
(2) when photosensitive resin crosslinks curing reaction, substantial amounts of heat can be discharged, causes beam irradiation area temperature liter
After long-time is irradiated, easily because crossing heat ageing, its transparency is reduced the Teflon material of height, oxygen and saturating ultraviolet light, is affected
Light efficiency and drip molding quality.
(3) a large amount of thermals source for discharging of CLIP high-speed and continuous solidification, currently existing scheme cannot also timely and effectively discharge and
These heat are discharged, thus the current Forming Workpiece of CLIP techniques is limited at less size objects and prints (small size part generation
It is hot relatively fewer, it is relatively easy that release is discharged in heat exchange).
(4) for the flying print of photosensitive resin, when separating rate reaches it is a certain amount of when, maximum restriction is exactly resin
Back-flow velocity, especially when the ratio of viscosities of resin is higher, it is more difficult to process.
Therefore, for the techniques such as the printing of large sized object, CLIP are also faced with that bottom dead liquid level and solidification cannot be realized
Liquid level consumes a quick supply difficult problem for resin material.Therefore, existing continuous ultraviolet curing process (such as CLIP) is only applicable to little
The printing of size objects, the typical part shape of printing is also limited to some engraved structures mostly, it is difficult to realize large scale and reality
The efficient system of body part；And the further raising of print speed and quality is restricted.In the urgent need to develop new technique and
Technology.
Utility model content
The purpose of this utility model is exactly to solve the above problems, there is provided a kind of high-speed and continuous photocuring 3D printing dress
Put, it adopts a kind of new print window, and combine the compound oxygen permeable membrane of window box, oxygen supply refrigerating module, liquid level auxiliary and apply
The advantage of die block three, realizes that (dead band oxygen content, dead band and solidification liquid level are quickly mended to the accurate effective control of dead band oxygen content
Give, solidification process discharges the quick discharge of heat), realize beating large scale, arbitrary shape drip molding low cost, high-efficiency and continuous
Print.
To achieve these goals, the utility model is adopted the following technical scheme that：
A kind of high-speed and continuous photocuring 3D printing device, including：Machine case body, the machine case body is divided into by central dividing plate
Upper chamber and lower chambers；The lower chambers are provided with image-forming module, and the upper chamber is provided with window box and oxygen supply refrigerating module, described
Window box and the combination of oxygen supply refrigerating module are fixedly mounted on central dividing plate, and the oxygen supply refrigerating module is arranged on the window box
Underface, the image-forming module is arranged on the underface of the window box；Print platform is provided with directly over the window box, institute
State print platform to be arranged on Z-direction workbench；The window box is connected with raw material feed unit；
The oxygen supply refrigerating module, including oxygen supply cooling chamber, the two ends of the oxygen supply cooling chamber respectively with cooling air inlet pipe
Road and cooling outlet pipe connection, the cooling air inlet pipeline is connected with oxygen supply cooling unit；Oxygen supply cooling chamber is arranged on window
The underface of box print window, and form closed chamber with print window；
During printing, by the way that oxygen supply refrigerating module is by the oxygen content in control window cassette bottom portion resin dead band and will continuously print
During discharge heat eject raising print speed in time.
A kind of high-speed and continuous photocuring 3D printing device, also includes：Liquid level additional pressure applicator module, the liquid level additional pressure applicator
Module includes the oilless air compressor being arranged in lower chambers, and the oilless air compressor is connected with the entrance of charged air induction pipeline, institute
The outlet for stating charged air induction pipeline is arranged in upper chamber, and the upper chamber has air-tightness.By resin liquid level additional pressure applicator
Module increases the gas pressure intensity of upper chamber, and during printing, gases at high pressure to photosensitive resin liquid level presses, and accelerates photosensitive resin to window
Cassette bottom portion resin dead band and the flowing of consolidation zone, realize resin quick backflow and supply.
The window box adopts separate structure, including：Reservoir, seal washer, compound oxygen permeable membrane and pressing plate；The confession
Oxygen cooling chamber, pressing plate, it is provided with through hole, oxygen supply cooling chamber, pressing plate and reservoir on compound oxygen permeable membrane, seal washer and reservoir
Hole be screwed hole, the side of oxygen supply cooling chamber is provided with boss, and the side of pressing plate has corresponding recessed with oxygen supply cooling chamber convex platform
Groove；The boss of the oxygen supply cooling chamber and the groove clamping of pressing plate, and be bolted connection.The pressing plate leads to reservoir
Bolt connection compression is crossed, the pressing plate accompanies between the two compound oxygen permeable membrane and seal washer, and seal washer with reservoir
Positioned at compound oxygen permeable membrane top.Oxygen supply cooling chamber bottom is provided with suprasil plate, and the area of suprasil plate is more than imaging area.
The reservoir is used to hold liquid photosensitive resin, and the seal washer is used to prevent storage liquid photosensitive resin from letting out
Leakage, the pressing plate is used to fix reservoir with compound oxygen permeable membrane.
The print window of window box is included using compound oxygen permeable membrane, compound oxygen permeable membrane：Porous support layer and oxygen-rich layer are constituted,
Porous support layer is located at the lower section of oxygen-rich layer.
The porous support layer is the film with finger-like or spongy pore structure, and the material of selection includes polytetrafluoroethylene (PTFE)
PTFE, Kynoar PVDF, polyacrylonitrile (PAN), polysulfones PS, polycarbonate, polyethylene terephtalate or poly-
Etherimide PEI, the aperture 50nm-2000nm of porous support layer, porosity 60%-90%, the thickness range of porous support layer
For 10-1000 microns.
The oxygen-rich layer is the dense film with high oxygen transmission coefficient, and the material of selection includes dimethyl silicone polymer
PDMS, perfluoroethylene-propylene FEP or poly- trimethyl silicane -1- propine PTMSP, the thickness range of oxygen-rich layer is 1-100 microns.
Compound oxygen permeable membrane has the characteristic of oxygen flow and saturating ultraviolet light, and oxygen transmission coefficient is in more than 10barrer, 365-
405nm uv transmittances are not less than 80%.And with excellent mechanical performance.
The print window area is more than imaging area.
The print platform area is less than print window, and the print platform area is equal to or more than imaging area.Print
Platform be located at window box directly over, and with print window keeping parallelism.
The base plate of the oxygen supply cooling chamber adopts transparency silica glass, 365-405nm uv transmittances to be not less than 90%,
Base areas are more than imaging area.
The image-forming module includes：Ultraviolet LED lamp, the ultraviolet LED lamp is connected with dynamic mask signal generating unit.
The ultraviolet LED lamp is ultraviolet LED module, and intensity of illumination is adjustable, and is furnished with heat sink and fan is radiated.It is purple
The power bracket of outer LED is 10-200W, and wave-length coverage 365-405nm, the light that it sends is irradiated to dynamic Jing after beam path alignment
In state mask signal generating unit.
The dynamic mask signal generating unit adopts DMD DMD, liquid crystal display LCD or spatial light modulator
SLM.Different type dynamic mask signal generating unit needs to configure corresponding beam path alignment, and the effect of collimated light path is to produce
Ultraviolet light being irradiated in dynamic mask signal generating unit according to required even angle；Dynamic mask signal generating unit is located at print window
Lower section, generation image upright projection is on the print window of window box.
The print platform is fixed on Z-direction workbench by connecting bracket；Z-direction workbench is fixed in cabinet upper chamber
In back plate.
Z-direction workbench is high-accuracy displacement work table, including：Electric precise translation stage, high accuracy straight line slide unit or piezoelectricity
Displacement platform.
Translational speed scope of the Z-direction workbench in print procedure is 10mm/h-1000mm/h, in non-print process
In moving range be 100mm/min-1000mm/min.
The raw material feed unit includes：Raw material material storage tube, feed connecting tube and measuring pump.The raw material material storage tube
It is connected with window box by feed connecting tube, the measuring pump is connected respectively with raw material material storage tube and feed connecting tube.Former material
Material material storage tube is arranged on lower chambers with measuring pump.
The lower chambers are provided with thermal window.
A kind of method of work of high-speed and continuous photocuring 3D printing device, comprises the steps：
Step (1)：Print initial setting up, pretreatment：Raw material feed unit is opened, to the reservoir injection liquid in window box
State photosensitive resin；Z-direction workbench drives print platform to be moved downwardly to initialization position, and print platform is immersed in liquid photosensitive
Resin, and print platform keeps setpoint distance with the compound oxygen permeable membrane in window box；Open oxygen supply cooling unit and oil-free pneumatics
Machine；
Step (2)：Continuous printing-forming part：Z-direction workbench is with setting speed continuance lifting, while image-forming module is continuously broadcast
Put layer images information；The ultraviolet selective that ultraviolet LED lamp is produced is irradiated on liquid photosensitive resin, and print platform is continuous
By the resin pull-up of solidification, window cassette bottom portion resin dead band endlessly supplements upwards liquid photosensitive resin needed for solidification, makes
Obtain print procedure serialization；
Step (3)：Post processing：After completing part printing, image-forming module, oxygen supply cooling unit and oilless air compressor are closed.Z
Print platform being driven to workbench and printing part return to original position；Remove print platform and print part；Finally, part will be printed
Remove from print platform.
The print platform of the step (1) keeps setpoint distance for 10-50 microns with the compound oxygen permeable membrane in window box.
In the continuous print procedure of the step (2), oxygen supply cooling unit and oilless air compressor are constantly in opening, and
And raw material feed unit is continuously replenished addition liquid photosensitive resin to reservoir.
In the continuous print procedure of the step (2), the work of oxygen supply refrigerating module, oxygen supply cooling unit by cooling air or
The cryogenic oxygen Jing cooling air inlet pipelines of setting concentration are transported to the envelope that oxygen supply cooling chamber is constituted with the compound oxygen permeable membrane of window box
Close in space, endlessly supplement the oxygen that solidification is consumed, and Jing cooling outlet pipes produce photosensitive resin crosslinking curing
Heat discharge in time, be accuracy controlling that compound oxygen permeable membrane supplemental oxygen is realized to dead band oxygen content, while take away solidification producing
Raw heat, keeps the temperature of dead band setting, prevents the aging of compound oxygen permeable membrane.
The step (2) makes upper chamber's gas boosting by liquid level additional pressure applicator module, and gases at high pressure force resin to dead
Flow in area, accelerate the supplementary speed of resin needed for solidification；
When large-size components are printed, solidification center farther out, acts on away from deadband boundaries entrance in the pressure of gases at high pressure
Under, resin quickly to the flowing of solidification center, realizes that resin is supplemented in time, realizes large-area continuous printing.
The step (2) is by compound oxygen permeable membrane and oxygen supply refrigerating module collective effect, the oxygen content in control accurate dead band
With the thickness in dead band.
The beneficial effects of the utility model：
The compound oxygen permeable membrane of the utility model comprehensive utilization, oxygen supply refrigerating module, liquid level additional pressure applicator module three it is common
Effect, realizes that large scale, the low cost of arbitrary shape part, high-efficiency and continuous are printed.
(1) large scale, the printing of arbitrary shaped body/part are realized.Mould is cooled down by introducing compound oxygen permeable membrane, oxygen supply
Block, liquid level additional pressure applicator module, realize the accuracy controlling to printing dead band oxygen content and dead band thickness, effectively solving large scale structure
Dead band and consolidation zone in the quick discharge and release, and large-scale part manufacture process of heat is discharged in part print procedure
A difficult problem for large area resin quick backflow supply.
(2) low production cost.Using a kind of compound oxygen permeable membrane of low cost, manufacturing cost is reduced.Improve continuous light to consolidate
The performance of chemical industry skill, and it is capable of the oxygen content and the thickness in dead band in control accurate dead band.
(3) by liquid level additional pressure applicator module, resin back-flow velocity in continuous print procedure is improve, realizes dead band and consolidate
Change the resin rapid recharge of liquid level, improve print speed；By liquid level additional pressure applicator module, improve large-scale part and produced
Resin back-flow velocity in journey, effectively solves dead band and consolidation zone large area resin in large-scale part manufacture process and quickly returns
A stream difficult problem, the high-speed and continuous for realizing arbitrary shape large sized object are printed, and are breached the existing continuous photocuring 3D such as CLIP and are beaten
The restriction being imprinted in terms of forming dimension, shape, efficiency, precision and cost.
(4) by oxygen supply refrigerating module, the big calorimetric that release is produced in continuous print procedure is discharged in time, improves continuous
Print speed；By compound oxygen permeable membrane and oxygen supply refrigerating module for the accuracy controlling of dead band oxygen content, print speed is improve.
By oxygen supply refrigerating module, the oxygen content in one side control accurate dead band, productivity ratio, expansion technique use range are improved (available
Printed material)；On the other hand, the heat that photosensitive resin material crosslinking curing is discharged can quickly be excluded, improves and print
Efficiency, while extend compound oxygen permeable membrane service life, (the continuous light such as existing CLIP is consolidated especially to be increased the size of printout
Chemical industry skill, the heat produced in Light Curing can not be excluded effectively and timely, constrain productivity ratio, have impact on the precision of product,
Particular without realize large-scale part print).
(5) printing precision is high, it is to avoid the defect such as thermal stress.By oxygen supply refrigerating module, holding dead band and consolidation zone
Temperature in optimized scope, discharge in time by the heat of generation.Print procedure is prevented effectively from due to interlayer thermal stress caused by temperature
Problem, improves printing precision and quality.
(6) printed material applicability is wide, expands the technique scope of application.For the requirement of different printed materials.By knot
Compound oxygen permeable membrane and oxygen supply refrigerating module are closed, the accuracy controlling to dead band oxygen content is realized, different printed materials are suitable for, is expanded
The scope of application of this technique.
(7) oxygen permeable membrane service life is extended.By oxygen supply refrigerating module for compound oxygen permeable membrane supplemental oxygen while band
The amount of heat that solidification is produced is walked, the aging of compound oxygen permeable membrane is prevented.
(8) the utility model makes 3D printing device upper chamber gas boosting, gases at high pressure by liquid level additional pressure applicator unit
Force resin to flow into " dead band " region, accelerate the supplementary speed of resin needed for solidification.Especially large-size components are printed
When, away from " dead band " border entries farther out, under the pressure effect of gases at high pressure, resin can be at faster speed for solidification center
To the flowing of solidification center, a resin supplement difficult problem not in time in the case of large scale is printed is solved, realize large-area company
It is continuous to print.
(9) the utility model realizes large scale, the low cost of arbitrary shape product, high-efficiency and continuous and prints, suitable material
Extensively, the precision of printout and quality are high, and uniformity is good, process stabilizing reliability, with extensive industrial application value.Can use
In desktop level 3D printer, technical grade 3D printing can be used for again.
Description of the drawings
Fig. 1 is the principle schematic diagram. of the high-speed and continuous photocuring 3D printing device of the utility model embodiment 1；
Fig. 2 is the structural principle stereogram of the high-speed and continuous photocuring 3D printing device of the utility model embodiment 1；
Fig. 3 is the window box of the utility model embodiment 1 and oxygen supply cooling chamber explosive view schematic diagram；
Fig. 4 is the high-speed and continuous photocuring 3D printing apparatus structure principle schematic of the utility model embodiment 2.
Wherein, 1DLP ray machines, 2 ultraviolet LED lamps, 3 oxygen supply cooling units, 4 oilless air compressors, 5 cooling air inlet pipelines, 6 add
It is pressed into air pipe, 7 cooling outlet pipes, 8 oxygen supply cooling chambers, 801 suprasil plates, 9 window boxes, 10 raw material feed units, 11
Cabinet, 12 print platforms, 13 connecting brackets, 14Z to workbench, 15 pressing plates, 16 compound oxygen permeable membranes, 17 seal washers, 18 liquid storages
Groove, 19 ultraviolet LED modules, 20 Fresnel Lenses, 21 LCDs.
Specific embodiment
Below in conjunction with the accompanying drawings the utility model is described in further detail with embodiment.
Embodiment 1
Fig. 1 is the principle schematic diagram. of the high-speed and continuous photocuring 3D printing device of the utility model embodiment 1, and Fig. 2 is
The structural principle stereogram of the high-speed and continuous photocuring 3D printing device of the utility model embodiment 1.The high-speed and continuous light of embodiment 1 is consolidated
Changing 3D printing device includes：DLP ray machines 1, ultraviolet LED lamp 2, oxygen supply cooling unit 3, oilless air compressor 4, cooling air inlet pipeline 5,
Charged air induction pipeline 6, cooling outlet pipe 7, oxygen supply cooling chamber 8, window box 9, raw material feed unit 10, cabinet 11, printing are flat
Platform 12, connecting bracket 13, Z-direction workbench 14.Wherein DLP ray machines 1 are located at cabinet 11 with the image-generating unit of the composition of ultraviolet LED lamp 2
Lower chambers；Both sides are respectively provided with oxygen supply cooling unit 3 and oilless air compressor 4；The image that DLP ray machines 1 are produced projects to upwards window
On mouth box 9；Window box 9 is combined on the central dividing plate of cabinet 11 with oxygen supply cooling chamber 8, and the two ends of oxygen supply cooling chamber 8 connect respectively
Connect cooling air inlet pipeline 5 and cooling outlet pipe 7；The other end of cooling air inlet pipeline 5 is connected with oxygen supply cooling unit 3；Plus
The one end for being pressed into air pipe 6 is connected with oilless air compressor 4, and other end is placed in the upper chamber of cabinet；Print platform 12 is located at window
Directly over mouth box 9, and it is fixed on Z-direction workbench 14 by connecting bracket 13；Z-direction workbench 14 is fixed in the epicoele of cabinet 11
In the back plate of room；Raw material feed unit 10 is connected by connecting line with the reservoir 18 of window box 9, and raw material feed unit 10 is put
In the lower chambers of cabinet 11.
The DLP ray machines 1 adopt TI companies DLP9500UV DMDs (DMD), beam path alignment to be integrated in DLP light
In machine 1.DLP ray machines 1 include dynamic mask signal generating unit, beam path alignment.
The power of ultraviolet LED lamp 2 is 30W, a length of 365nm of ultraviolet light wave.
The oxygen supply cooling unit 3 includes air compressor machine, vortex tube cooler, interface unit etc..Air compressor machine passes through connector
Part is connected with vortex tube cooler.The range of flow of oxygen supply cooling unit 3 is 0.1-10L/min, cools down air inlet pipeline 5, cooling
The working range of outlet pipe 7 is 1-7bar.Temperature 1-15 DEG C of cooling gas.
The oxygen supply cooling unit 3, cooling air inlet pipeline 5, cooling outlet pipe 7, the composition oxygen supply cooling of oxygen supply cooling chamber 8
Cooling air (or certain density cryogenic oxygen) Jing cooling air inlet pipelines 5 are transported to oxygen supply by module, oxygen supply cooling unit 3
In the closing space that cooling chamber 8 is constituted with the compound oxygen permeable membrane 16 of window box 9, the oxygen that solidification is consumed endlessly is supplemented,
And Jing cooling outlet pipes 7 in time discharge the heat that photosensitive resin crosslinking curing is produced.On the one hand oxygen supply refrigerating module is realized
Accuracy controlling to dead band oxygen content, on the other hand in time excludes the big calorimetric produced in continuous print procedure, keeps dead band
The temperature of setting.
The power 6KW of the oilless air compressor 4, operating pressure 1-7bar.
The oilless air compressor 4, charged air induction pipeline 6, the upper chamber of cabinet 11 composition liquid level additional pressure applicator module, it is right to realize
The resin quick backflow and supply of dead band and solidification liquid level.
The cabinet 11 is divided into upper and lower chamber by boundary of central dividing plate.Upper chamber requires that air-tightness is good, and chassis frame connects
Place is met using high-air-tightness rubber bound, hypocavate is provided with thermal window, and thermal diffusivity is good.
Fig. 3 is the window box 9 of the utility model embodiment 1 and the explosive view of oxygen supply cooling chamber 8, and the window box 9 includes liquid storage
Groove 18, seal washer 17, compound oxygen permeable membrane 16, pressing plate 15.The oxygen supply cooling chamber 8, pressing plate 15, compound oxygen permeable membrane 16, sealing
The through hole of up/down perforation is provided with packing ring 17, reservoir 18, hole is screw thread wherein on oxygen supply cooling chamber 8, pressing plate 15, reservoir 18
Hole, the side of oxygen supply cooling chamber 8 is provided with boss, and there is groove corresponding with the convex platform of oxygen supply cooling chamber 8 side of pressing plate 15.It is described
The side boss of oxygen supply cooling chamber 8 and the side groove clamping of pressing plate 15, and it is bolted fastening.The pressing plate 15 and reservoir
18 are bolted compression, and compound oxygen permeable membrane 16 and seal washer 17 are accompanied between the two, and seal washer 17 is located at again
Close the top of oxygen permeable membrane 16.Described one end of oxygen supply cooling chamber 8 with cooling air inlet pipeline 5 be connected, the other end with cooling outlet pipe 7
Be connected, the bottom of oxygen supply cooling chamber 8 is provided with suprasil plate 801, the area of quartz plate should be greater than imaging area (formation of parts
Size).
The compound oxygen permeable membrane 16 is made up of PET porous support layers and PDMS oxygen-rich layers.Wherein, PET porous support layers
Thickness is 100 microns, and PET porous support layers aperture is 1 micron, and it is 50 microns that porosity is the thickness of 80%, PDMS selection layers.
Uv transmittance of the compound oxygen permeable membrane 16 for wavelength for 395-405nm is not less than 80%, and oxygen transmission coefficient exists
More than 100barrer, tensile strength is in more than 10MPa.
The oxygen supply cooling chamber 8 is at tight state by the compound oxygen permeable membrane 16 of jack-up.
The 3D printing device of liquid photosensitive resin is solidified based on the high-speed and continuous projection exposure of above-described embodiment 1, is realized at a high speed
The method of work of continuous photocuring 3D printing, comprises the steps：
Step 1：Print initial setting up, pretreatment.Raw material feed unit 10 is opened, to the note of reservoir 18 in window box 9
Enter liquid photosensitive resin；Z-direction workbench 14 drives print platform 12 to be moved downwardly to initialization position, and print platform 12 immerses
To liquid photosensitive resin, and about 50 microns of distance is kept with compound oxygen permeable membrane 16.Oxygen enters liquid through compound oxygen permeable membrane 16
State photosensitive resin, forms in " dead band " of about 20 microns of thickness on film surface, the resin in region under the irradiation of ultraviolet light not yet
Can solidify, so Light Curing occurs all the time about 20 microns on compound oxygen permeable membrane 16 of position.
Step 2：Continuous printing-forming part.With setting speed continuance lifting on Z-direction workbench 14, while DLP ray machines 1 are continuous
Broadcasting aspect image information.The ultraviolet selective that ultraviolet LED lamp 2 is produced is irradiated on resin, and print platform 12 constantly will
The resin pull-up of solidification, " dead band " endlessly supplements upwards resin needed for solidification so that print procedure serialization.Continuously beat
During print, oxygen supply cooling unit 3, oilless air compressor 4 is constantly in opening, and raw material feed unit 10 to reservoir
Addition resin is continuously replenished in 18.
Step 3：Post processing.After completing part printing, DLP ray machines 1, ultraviolet LED lamp 2, oxygen supply cooling unit 3, nothing are closed
Oily air compressor machine 4.Z-direction workbench 14 drives print platform 12 and prints part and returns to original position.Remove print platform 12 and printing zero
Part.Part will be printed to remove from print platform 12.
Embodiment 2
The printing equipment principle schematic diagram. of embodiment 2 using lcd technology as shown in figure 4, produce dynamic mask.
Wherein it is imaged and is made up of ultraviolet LED module 19, Fresnel Lenses 20, LCDs 21, it is ultraviolet that ultraviolet LED module 19 is produced
Light is irradiated on LCDs 21 after collimating Jing Fresnel Lenses 20, and LCDs 21 continuously plays image information, from
And produce the projected image needed for solidification.
Embodiment 3
Used as another embodiment, it is adjustable that the cooling outlet pipe 7 is set to outlet pressure.When oxygen supply cooling chamber 8
With when air pressure reaches certain threshold value in the closing space of the composition of compound oxygen permeable membrane 16, just can be discharged with Jing cooling outlet pipes 7, be led to
Air pressure in increasing closing space is crossed, ability of the oxygen through compound oxygen permeable membrane is improved.
It is not new to this practicality although the above-mentioned accompanying drawing that combines is described to specific embodiment of the present utility model
The restriction of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Various modifications or deform still in protection model of the present utility model that field technique personnel make by need not paying creative work
Within enclosing.
Claims (10)
1. a kind of high-speed and continuous photocuring 3D printing device, is characterized in that, including：Machine case body, the machine case body is by centre
Dividing plate is divided into upper chamber and lower chambers；The lower chambers are provided with image-forming module, and the upper chamber is provided with window box and oxygen supply cooling
Module, the window box and the combination of oxygen supply refrigerating module are fixedly mounted on central dividing plate, and the oxygen supply refrigerating module is arranged on
The underface of the window box, the image-forming module is arranged on the underface of the window box；It is provided with directly over the window box
Print platform, the print platform is arranged on Z-direction workbench；The window box is connected with raw material feed unit；
The oxygen supply refrigerating module, including oxygen supply cooling chamber, the two ends of the oxygen supply cooling chamber respectively with cooling air inlet pipeline and
Cooling outlet pipe connection, the cooling air inlet pipeline is connected with oxygen supply cooling unit；Oxygen supply cooling chamber is beaten installed in window box
The underface of print window, and form closed chamber with print window；
During printing, by oxygen supply refrigerating module by the oxygen content in control window cassette bottom portion resin dead band and by continuous print procedure
The heat of middle release ejects in time raising print speed.
2. a kind of high-speed and continuous photocuring 3D printing device as claimed in claim 1, is characterized in that, also include：Liquid level is aided in
Pressure module, the liquid level additional pressure applicator module includes being arranged on oilless air compressor in lower chambers, the oilless air compressor with
The entrance connection of charged air induction pipeline, the outlet of the charged air induction pipeline is arranged in upper chamber, and the upper chamber has gas
Close property；The gas pressure intensity of upper chamber is increased by resin liquid level additional pressure applicator module, during printing, gases at high pressure are to photosensitive resin liquid
Face presses, and accelerates photosensitive resin to the flowing of window cassette bottom portion resin dead band and consolidation zone, realizes resin quick backflow and benefit
Give.
3. a kind of high-speed and continuous photocuring 3D printing device as claimed in claim 1 or 2, is characterized in that,
The window box adopts separate structure, including：Reservoir, seal washer, compound oxygen permeable membrane and pressing plate；The oxygen supply is cold
But room, pressing plate, be provided with through hole, the hole of oxygen supply cooling chamber, pressing plate and reservoir on compound oxygen permeable membrane, seal washer and reservoir
For screwed hole, the side of oxygen supply cooling chamber is provided with boss, and there is groove corresponding with oxygen supply cooling chamber convex platform the side of pressing plate；Institute
The boss of oxygen supply cooling chamber and the groove clamping of pressing plate are stated, and is bolted connection；The pressing plate passes through spiral shell with reservoir
Tether and connect compression, the pressing plate accompanies between the two compound oxygen permeable membrane and seal washer with reservoir, and seal washer is located at
Compound oxygen permeable membrane top.
4. a kind of high-speed and continuous photocuring 3D printing device as claimed in claim 1, is characterized in that,
The print window of window box is included using compound oxygen permeable membrane, compound oxygen permeable membrane：Porous support layer and oxygen-rich layer, open support
Layer is located at the lower section of oxygen-rich layer.
5. a kind of high-speed and continuous photocuring 3D printing device as claimed in claim 4, is characterized in that,
The porous support layer is the film with finger-like or spongy pore structure, and the material of selection includes polytetrafluoroethylene (PTFE)
PTFE, Kynoar PVDF, polyacrylonitrile (PAN), polysulfones PS, polycarbonate, polyethylene terephtalate or poly-
Etherimide PEI, the aperture 50nm-2000nm of porous support layer, porosity 60%-90%, the thickness range of porous support layer
For 10-1000 microns.
6. a kind of high-speed and continuous photocuring 3D printing device as claimed in claim 4, is characterized in that,
The oxygen-rich layer is the dense film with high oxygen transmission coefficient, the material of selection include polydimethylsiloxane,
Perfluoroethylene-propylene FEP or poly- trimethyl silicane -1- propine PTMSP, the thickness range of oxygen-rich layer is 1-100 microns.
7. a kind of high-speed and continuous photocuring 3D printing device as claimed in claim 4, is characterized in that,
Compound oxygen permeable membrane has the characteristic of oxygen flow and saturating ultraviolet light, and oxygen transmission coefficient is in more than 10barrer, and 365-405nm is purple
Outer light transmission rate is not less than 80%.
8. a kind of high-speed and continuous photocuring 3D printing device as claimed in claim 1, is characterized in that, the oxygen supply cooling chamber
Base plate adopts transparency silica glass, 365-405nm uv transmittances to be not less than 90%, and base areas are more than imaging area.
9. a kind of high-speed and continuous photocuring 3D printing device as claimed in claim 1, is characterized in that, the image-forming module bag
Include：Ultraviolet LED lamp, the ultraviolet LED lamp is connected with dynamic mask signal generating unit；
The ultraviolet LED lamp is ultraviolet LED module, and intensity of illumination is adjustable, and is furnished with heat sink and fan is radiated；It is ultraviolet
The power bracket of LED is 10-200W, and wave-length coverage 365-405nm, the light that it sends is irradiated to dynamic Jing after beam path alignment
In mask signal generating unit；
The dynamic mask signal generating unit adopts DMD DMD, liquid crystal display LCD or spatial light modulator SLM；
Different type dynamic mask signal generating unit needs to configure corresponding beam path alignment, and the effect of collimated light path is ultraviolet by what is produced
Light being irradiated in dynamic mask signal generating unit according to required even angle；Dynamic mask signal generating unit is located under print window
Side, generation image upright projection is on the print window of window box.
10. a kind of high-speed and continuous photocuring 3D printing device as claimed in claim 1, is characterized in that,
The print platform is fixed on Z-direction workbench by connecting bracket；Z-direction workbench is fixed in cabinet upper chamber back plate
On.
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| CN201621169565.3U CN206085666U (en) | 2016-10-26 | 2016-10-26 | High -speed continuous light solidification 3D printing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621169565.3U CN206085666U (en) | 2016-10-26 | 2016-10-26 | High -speed continuous light solidification 3D printing device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106426915A (en) * | 2016-10-26 | 2017-02-22 | 青岛理工大学 | High-speed continuous photocuring type 3D printing device and working method thereof |
| CN108357097A (en) * | 2017-12-29 | 2018-08-03 | 网云（武汉）三维科技股份有限公司 | A kind of continuous surface molding 3D printing equipment based on mobile phone |
| JP2021523036A (en) * | 2018-05-07 | 2021-09-02 | フォームラブス, インコーポレーテッドFormlabs, Inc. | Multi-material separation layer for laminated modeling |
| CN114770696A (en) * | 2022-05-14 | 2022-07-22 | 苏州大学 | 3D dynamic forming optimization design method for ceramic device |
| EP3840936B1 (en) * | 2018-08-20 | 2023-05-03 | Nexa3D Inc. | Methods and systems for photo-curing photo-sensitive material for printing and other applications |
-
2016
- 2016-10-26 CN CN201621169565.3U patent/CN206085666U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106426915A (en) * | 2016-10-26 | 2017-02-22 | 青岛理工大学 | High-speed continuous photocuring type 3D printing device and working method thereof |
| CN106426915B (en) * | 2016-10-26 | 2019-01-11 | 青岛理工大学 | A kind of continuous photocuring 3D printing device of high speed and its working method |
| CN108357097A (en) * | 2017-12-29 | 2018-08-03 | 网云（武汉）三维科技股份有限公司 | A kind of continuous surface molding 3D printing equipment based on mobile phone |
| JP2021523036A (en) * | 2018-05-07 | 2021-09-02 | フォームラブス, インコーポレーテッドFormlabs, Inc. | Multi-material separation layer for laminated modeling |
| EP3840936B1 (en) * | 2018-08-20 | 2023-05-03 | Nexa3D Inc. | Methods and systems for photo-curing photo-sensitive material for printing and other applications |
| CN114770696A (en) * | 2022-05-14 | 2022-07-22 | 苏州大学 | 3D dynamic forming optimization design method for ceramic device |
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