CN109483872A - Application of the expendable material in the printing of micro-structure 3D photocuring - Google Patents
Application of the expendable material in the printing of micro-structure 3D photocuring Download PDFInfo
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- CN109483872A CN109483872A CN201811196663.XA CN201811196663A CN109483872A CN 109483872 A CN109483872 A CN 109483872A CN 201811196663 A CN201811196663 A CN 201811196663A CN 109483872 A CN109483872 A CN 109483872A
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- 239000000463 material Substances 0.000 title claims abstract description 43
- 238000007639 printing Methods 0.000 title claims abstract description 34
- 238000000016 photochemical curing Methods 0.000 title claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 91
- 229920005989 resin Polymers 0.000 claims abstract description 91
- 238000010146 3D printing Methods 0.000 claims abstract description 13
- 239000000178 monomer Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 7
- 238000006552 photochemical reaction Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 22
- 239000000243 solution Substances 0.000 claims description 19
- 239000010410 layer Substances 0.000 claims description 16
- 239000007853 buffer solution Substances 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000011229 interlayer Substances 0.000 claims description 4
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- -1 scraper Substances 0.000 claims description 3
- 239000013077 target material Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- FYKDNWHPKQOZOT-UHFFFAOYSA-M sodium;dihydrogen phosphate;2-hydroxypropane-1,2,3-tricarboxylic acid Chemical compound [Na+].OP(O)([O-])=O.OC(=O)CC(O)(C(O)=O)CC(O)=O FYKDNWHPKQOZOT-UHFFFAOYSA-M 0.000 claims description 2
- XPFJYKARVSSRHE-UHFFFAOYSA-K trisodium;2-hydroxypropane-1,2,3-tricarboxylate;2-hydroxypropane-1,2,3-tricarboxylic acid Chemical compound [Na+].[Na+].[Na+].OC(=O)CC(O)(C(O)=O)CC(O)=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O XPFJYKARVSSRHE-UHFFFAOYSA-K 0.000 claims description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N monobenzene Natural products C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims 2
- FTHUKEBATJXQFL-UHFFFAOYSA-N formic acid;hydrochloride Chemical compound Cl.OC=O FTHUKEBATJXQFL-UHFFFAOYSA-N 0.000 claims 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims 1
- HXMWJLVXIHYART-UHFFFAOYSA-M sodium;2-hydroxypropane-1,2,3-tricarboxylic acid;hydroxide;hydrochloride Chemical compound [OH-].[Na+].Cl.OC(=O)CC(O)(C(O)=O)CC(O)=O HXMWJLVXIHYART-UHFFFAOYSA-M 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 16
- 239000000725 suspension Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002253 acid Substances 0.000 description 7
- 238000004090 dissolution Methods 0.000 description 6
- GNWBLLYJQXKPIP-ZOGIJGBBSA-N (1s,3as,3bs,5ar,9ar,9bs,11as)-n,n-diethyl-6,9a,11a-trimethyl-7-oxo-2,3,3a,3b,4,5,5a,8,9,9b,10,11-dodecahydro-1h-indeno[5,4-f]quinoline-1-carboxamide Chemical compound CN([C@@H]1CC2)C(=O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H](C(=O)N(CC)CC)[C@@]2(C)CC1 GNWBLLYJQXKPIP-ZOGIJGBBSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- YLGYACDQVQQZSW-UHFFFAOYSA-N n,n-dimethylprop-2-enamide Chemical compound CN(C)C(=O)C=C YLGYACDQVQQZSW-UHFFFAOYSA-N 0.000 description 3
- 238000001259 photo etching Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920000604 Polyethylene Glycol 200 Polymers 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
- 125000005250 alkyl acrylate group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229940088644 n,n-dimethylacrylamide Drugs 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- LRWJZGCOPMDWFZ-UHFFFAOYSA-N phthalic acid;hydrochloride Chemical compound Cl.OC(=O)C1=CC=CC=C1C(O)=O LRWJZGCOPMDWFZ-UHFFFAOYSA-N 0.000 description 1
- OTNVGWMVOULBFZ-UHFFFAOYSA-N sodium;hydrochloride Chemical compound [Na].Cl OTNVGWMVOULBFZ-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/205—Means for applying layers
- B29C64/214—Doctor blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
Abstract
The present invention provides application of the expendable material in the printing of micro-structure 3D photocuring, comprise the following steps: step A: by the image projection on DLP to film and resin contact surface, resin monomer occurs photochemical reaction and is cross-linked into solid the projection lens in more micro- stereolithography systems of material；Step B: system is provided with two scrapers arranged side by side, walks preceding scraper and strikes off old resin, walks posterior scraper and smears resin backward；Step C: system changes liquid film；Step D: above step is repeated to different materials, successively completes the printing of 3D sample.The beneficial effects of the present invention are: being provided using more file printing systems how in minute yardstick printing suspension and movable part, to realize the full 3D printing of minute yardstick.It also proposed a kind of formula for being used as the photosensitive resin for sacrificing mechanism in 3D printing simultaneously, also optimize application of the sacrificial resin in support construction on this basis.
Description
Technical field
The present invention relates to a kind of 3D printing fields more particularly to a kind of expendable material in the printing of micro-structure 3D photocuring
Using.
Background technique
With the development of 3D printing technique, application range is also constantly expanding, and from Structural Engineering, material engineering is arrived
Biology and medical engineering;From macro smooth scale (more than centimetres) to micro-scale (below millimeter).But the skill of traditional 3D printing
The defect of art also starts to present, such as more materials, high-precision (less than 50 microns), suspended structure and bascule etc..In macro light
Scale, in order to print suspended structure and bascule, existing method is to print support construction simultaneously, and the later period, artificial mechanism was gone again
Except support construction.These support constructions are often some fine columnar groups.For micro-scale, artificial mechanism removes support construction
Have been changed to it is unrealistic, or even can not because in microstructure, during mechanical removal first to the requirement of tool extremely
It is harsh and expensive, followed by easily damage the structure of needs.For this purpose, Cabrera most proposed projecting micro- solid early in 1998
Suspended structure is made with sacrificial layer material in photoetching, but the work of early period is due to the limitation of photoetching technique, is all to pass through craft
Inefficient switching resin is realized, some flat structures are made；Although proposing later summer spring scenery in 2009 and side are gorgeous
Realized in project stereoscopic photoetching technique using the same resin of low gradation exposure sacrifice structure production, but this method for
Different resins has different effects, even requires different etchant solutions to different resins.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of expendable material answering in the printing of micro-structure 3D photocuring
With.
Specifically, the present invention provides a kind of micro- stereolithography system of more materials, including set gradually ray machine, film, scrape
Knife structure, resin delivery, container molding and control computer；The ray machine includes micro display chip, and the micro display chip is adopted
With reflective liquid crystal screen LCOS or DLP.
Most important component is micro display chip in ray machine, it can be reflective liquid crystal screen LCOS either Texas Instrument
Digital optical demodulator (DLP), LCOS is considered the brightness and contrast for having better image than traditional transflective liquid crystal screen
Its each pixel can adjust the polarization state of reflected light according to the voltage of application.Therefore one piece of polaroid is added in the optical path can
The reflected light of corresponding polarization pixel is allowed to pass through to form image.DLP technology was invented in 1987 by Texas Instrument, with liquid crystal
The principle that screen changes the polarization state of reflected light is different, and each pixel of DLP is a small reflective mirror.It passes through deflected micromirror
Face controls the whereabouts of reflected light.Deflectable ± the 10o. of each eyeglass bright pixel is exactly that reflected light enters camera lens, opposite
It is exactly dark pixel.The gray scale of image is controlled by the frequency of eyeglass deflection.DLP chip has better than liquid crystal chip
We using the resolution of DLP chip are 1920X1080 in this invention by ultraviolet light compatibility and higher contrast,
Each micro mirror chip size is that 7.6 um X, 7.6 um. optical source wavelength is the optical section that 405 nanometers of opticators include ray machine
Part, the camera of a spectroscope and printing surface monitoring.One projection lens connects the image projection on DLP to film and resin
Contacting surface, resin monomer occurs photochemical reaction and is cross-linked into solid there.
The present invention provides a kind of Method of printing using expendable material in the printing of micro-structure 3D photocuring, including following several
A step:
Step A: the projection lens in the micro- stereolithography system of material sets the image projection on DLP to film and resin contact surface
Alicyclic monomer occurs photochemical reaction and is cross-linked into solid；
Step B: system is provided with two scrapers arranged side by side, walks preceding scraper and strikes off old resin, walks posterior scraper backward
Smear resin；
Step C: system changes liquid film；
Step D: above step is repeated to different materials, successively completes the printing of 3D sample.
Preferably, the step C including the following steps:
Step C1: at the uniform velocity moving scraper to the side of film, while scraper spues new resin to the opposite direction of movement, coated membrane table
Face；
Step C2: scraper and film are detached from, and sample stage rises to after designated position, and image is projected on film.
Preferably, the material of the film uses PDMS or PFA, and thickness uses 25 microns to 100 microns.
Preferably, the step of step C1 are as follows:
It printing interlayer and switches resin, the second resin is printed upon on the first resin, after scraper is painted with the second resin on film, sample quilt
It is moved to apart from the corresponding thickness of film, then the second resin layer is exposed.
Preferably, the step of step C1 are as follows:
Switch resin in layer, the second resin is printed upon in the first resin layer, and after scraper is painted with the second resin on film, sample can be returned
To the position tangent with film, by the second resin squeeze into same layer need to fill the space of the second resin then to the second resin according to
When the exposure of layer picture, step can be repeated before exposure when needing: applying the second resin, and the first resin of extruding is multiple, thus
Avoid the mixing of the second resin and the first resin.
Preferably, first resin is target material resin, and second resin is that can sacrifice light-sensitive material resin.
Wherein, target material resin may is that acrylate, acrylamide and silicone-acrylate, difunctional or
The one or more of multi-functional alkyl acrylate, alkoxy acrylic ester or glycols acrylate.
Preferably, it is described sacrifice light-sensitive material the preparation method comprises the following steps: DMMA(N, N- dimethylacrylamide, CAS:
2680-03-7) monomer and its 819 photoinitiator of mixed solution and Igacure are mixed by the weight ratio of 100:2-100:6
Body is prepared at room temperature, while the modes such as mechanical stirring (> 800 revs/min), ultrasonic vibration can be used and accelerate photoinitiator
Dissolution.
The present invention also provides a kind of method for releasing of the expendable material of the bascule in 3D printing, comprising the following steps:
It is impregnated needing the device for carrying out expendable material release to be put into the buffer solution or water of pH=3.0, solution rate is greater than 150
Micro- m/h.Release solution is also possible to water.
The beneficial effects of the present invention are: how being provided using more file printing systems in minute yardstick printing suspension and activity
Component, to realize the full 3D printing of minute yardstick.It also proposed a kind of light for being used as sacrifice mechanism in 3D printing simultaneously
The formula of quick resin also optimizes application of the sacrificial resin in support construction on this basis.
Detailed description of the invention
Fig. 1 is the micro- stereoprojection lithography system of the more material faces of inventive film coating.
Fig. 2 is a kind of embodiment of the double scraper coating structures of present system
Fig. 3 is that present system changes liquid film flow diagram.
Fig. 4 is two kinds of interlayer switching resin schematic diagrames of the present invention.
Fig. 5 is that the suspended structure and action result sample, arrow in 3D printing of the present invention represent Print direction.
Fig. 6 is the application that the present invention projects expendable material in micro- stereolithography printing, and arrow represents Print direction.
Fig. 7 be in MCSL of the present invention expendable material to the optimization figure of support structure designs.
Specific embodiment
With reference to the accompanying drawing, preferably embodiment of the invention is described in further detail:
Embodiment 1
As shown in Figure 1, more micro- stereolithography systems of material include: that ray machine 10, electronics (penetrate) beam splitter 20, detergent 31, tree
Rouge delivers 30, projecting lens 40, scraper 50, film 60 and container 70.
Embodiment 2
A kind of Method of printing using expendable material in the printing of micro-structure 3D photocuring, comprises the following steps:
The lower surface that one projection lens contacts the image projection on DLP to film and resin, light occurs for resin monomer there
It chemically reacts and is cross-linked into solid.Here the material of film can be PDMS, PFA or other transparent films, thickness from
25 microns to 100 microns.The system has two scrapers arranged side by side (Fig. 2), to strike off resin, 0.5 millimeters deep of scraper teleblem.Often
Scraper is ined succession two kinds of resins.Preceding scraper is walked when work and strikes off old resin, is walked posterior scraper and is smeared resin backward, such as
Scheme (3).In MCSL, the switching of resin in two kinds of situation (Fig. 4), first is that printing interlayer switches resin, a kind of printing of resin
On another resin, after scraper is painted with new resin on film, sample is moved to apart from the corresponding thickness of film, to new tree
The exposure of rouge layer；Second is that switching resin in layer, a kind of resin is printed upon in another resin layer, and in this case, scraper is on film
After being painted with new resin, sample can return to the position tangent with film, and new resin is squeezed into the sky that same layer needs to fill new resin
Between then to new resin according to when layer picture exposure.
Fig. 3, system change liquid apply membrane process: 1,0.5 millimeter of double scraper teleblems；2, at the uniform velocity move scraper to the other side of film,
Scraper smears film surface to the new resin of the opposite direction of movement discharge simultaneously；3, scraper and film are detached from, and sample stage rises to finger
After positioning is set, image is projected on film.Above step is repeated to different materials, successively completes the printing of 3D sample.
Here suspended structure is relative to 3 D-printing direction, and such as Fig. 5, arrow represents Print direction.Suspended structure exists
It is printed before connection structure, so if in printing, it is floated not as support construction, position is indefinite, and causes most
It can not form eventually；Bascule cannot have any adhesion with adjacent structure again, therefore also must have support construction could be final
Molding.As previously mentioned, filament support construction traditional in micro-scale is no longer applicable in.Applicant proposes a kind of new side
Method, such as Fig. 6 print support with the degradable photosensitive sacrificial resin of gas or liquid in the micro- stereolithography system of more materials simultaneously
Structure.Sample after printing is placed in corrosion in gas (plasma, acid, alkalinity) or solution (acid, alkalinity) again
Support construction is sacrificed in removal.This gas and solution have the corrosion of very strong (10 times or more) to select structural material and expendable material
Property.This method without entire support construction all use can sacrificial resin, traditional support construction application in, pillar or needle-shaped
Support is finally to be broken support construction from junction by mechanical means to remove.Therefore in fact, we are only permitted in support machine
The junction of structure and practical application structure introduces degradable resin it is ensured that the chemistry of support construction removes (Fig. 7).It is this
Method has not only saved the consumption of expendable material, and will greatly improve print speed, because the major part of support construction can
With with same structural material, and do not have to frequently switch to expendable material.
It can sacrifice there are many kinds of light-sensitive materials, functional structure may have corresponding drop to solution of different nature or gas
Solution performance, such as the DMMA(N of here, N- dimethylacrylamide, CAS:2680-03-7) monomer and its mixing it is molten
By the weight ratio mixture of 100:2 or so, we are prepared for three kinds of solution, formula point for liquid and 819 photoinitiator of Igacure
It is not 1:73.5% DMAA monomer, 24.5%H2O, 2% Igacure 819；It is formulated 2:73.5%DMAA monomer, 24.5% poly- second two
Alcohol (MW200), 2% Igacure 819；It is formulated 3:98%DMAA monomer, 2% Igacure 819, curing molding situation is investigated, acid
Dissolubility tests (being put into the acid solution of PH=3 after solidification), and observation print dissolves situation within every 1 hour.As a result such as table 1.
The acid dissolution speed of 1 difference DMMA of table formula
| Formula | Solidification energy | At type hardness tester | Print thickness | Dissolution time | Solution rate |
| 1 | 4.4J/cm2 | 65 Shore A | 1.03mm | 4h | 257.5um/h |
| 2 | 4.4J/cm2 | 40 Shore A | 0.87mm | 1h | 870.0 um/h |
| 3 | 4.4J/cm2 | 80 Shore A | 0.66mm | 2h | 330.0 um/h |
It is anti-that data show that acid-soluble monomer DMAA can carry out photocuring under conditions of photoinitiator Igacure 819 is added
It answers, he can also be miscible with water, polyethylene glycol (PEG molecular weight 200), and carries out photocuring reaction.DMMA monomer light is solid
It can be dissolved in the buffer solution of PH=3 after change, rate of dissolution 330um/h, the water of certain proportion (25%) is added not in formula
Stereolithography is influenced, but its acid dissolution rate can be reduced to 257.5 um/h；Certain proportion (mass concentration is added in formula
25%) PEG(200) Stereolithography is not influenced, and its acid dissolution rate can be promoted to 870um/h.
Wherein, buffer solution uses the buffer solution of PH=3, using sodium dihydrogen phosphate-citric acid solution, citric acid-hydrogen-oxygen
Change one of sodium-hydrochloric acid solution, citric acid-sodium citrate solution, phthalic acid-hydrochloric acid solution.
In the present invention, it using the side of rubbing (BMF) more file printing systems, provides and how to print suspension in minute yardstick and live
Dynamic component, to realize the full 3D printing of minute yardstick.We also proposed one kind for being used as sacrifice machine in 3D printing simultaneously
The formula of the photosensitive resin of structure also optimizes application of the sacrificial resin in support construction on this basis.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. a kind of micro- stereolithography system of more materials, ray machine, optical path, film, scraper, resin including setting gradually are delivered, are formed
Container and control computer；The ray machine includes micro display chip, the micro display chip using reflective liquid crystal screen LCOS or
DLP。
2. a kind of Method of printing using expendable material in the printing of micro-structure 3D photocuring, comprises the following steps:
Step A: projection lens in more micro- stereolithography systems of material as described in claim 1 is by the image projection on DLP
To film and resin contact surface, resin monomer occurs photochemical reaction and is cross-linked into solid；
Step B: system is provided with two scrapers arranged side by side, walks preceding scraper and strikes off old resin, walks posterior scraper backward
Smear resin；
Step C: system changes liquid film；
Step D: above step is repeated to different materials, successively completes the printing of 3D sample.
3. method according to claim 2, which is characterized in that the step C including the following steps:
Step C1: at the uniform velocity moving scraper to the side of film, while scraper spues new resin to the opposite direction of movement, coated membrane table
Face；
Step C2: scraper and film are detached from, and sample stage rises to after designated position, and image is projected on film.
4. Method of printing as claimed in claim 2, which is characterized in that the material of the film use PDMS, PFA or other
Transparent film, thickness use 25 microns to 100 microns.
5. Method of printing as claimed in claim 3, which is characterized in that the step of the step C1 are as follows:
It printing interlayer and switches resin, the second resin is printed upon on the first resin, after scraper is painted with the second resin on film, sample quilt
It is moved to apart from the corresponding thickness of film, then the second resin layer is exposed.
6. Method of printing as claimed in claim 3, which is characterized in that the step of the step C1 are as follows:
Switch resin in layer, the second resin is printed upon in the first resin layer, and after scraper is painted with the second resin on film, sample can be returned
To the position tangent with film, by the second resin squeeze into same layer need to fill the space of the second resin then to the second resin according to
When layer picture exposes, alternatively, repeating step before exposure: the second resin is applied, and it is multiple to squeeze the first resin, to avoid the
The mixing of two resins and the first resin.
7. such as Method of printing described in claim 5 or 6, which is characterized in that first resin is target material resin, described
Second resin is that can sacrifice light-sensitive material resin.
8. Method of printing as claimed in claim 2, which is characterized in that it is described sacrifice light-sensitive material the preparation method comprises the following steps:
DMMA monomer and 819 photoinitiator of Igacure are mixed by the weight ratio of 100:2-100:6.
9. a kind of method for releasing of the expendable material of the bascule in 3D printing, which comprises the following steps: need to
The device for carrying out expendable material release, which is put into the buffer solution or water of pH=3.0, to be impregnated, solution rate be greater than 330 microns/
Hour.
10. a kind of method for releasing of the expendable material of the bascule in 3D printing, which is characterized in that the buffer solution is adopted
With: sodium dihydrogen phosphate-citric acid solution, citric acid-sodium hydroxide-hydrochloric acid solution, citric acid-sodium citrate solution, adjacent benzene two
Formic acid-hydrochloric acid solution.
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| CN109970450A (en) * | 2019-03-28 | 2019-07-05 | 天津大学 | A kind of photosensitive ceramic liquid for 3D printing and its ceramic parts |
| CN110027210A (en) * | 2019-05-29 | 2019-07-19 | 吴振行 | Multiple material sunk type photocuring Method of printing |
| CN111168995A (en) * | 2020-01-03 | 2020-05-19 | 深圳摩方新材科技有限公司 | Multi-material photocuring 3D printing equipment for film coating and using method thereof |
| CN111531881A (en) * | 2020-04-03 | 2020-08-14 | 湖南大学 | A multi-mode multi-material 3D printing device |
| US20210299952A1 (en) * | 2020-03-25 | 2021-09-30 | Bmf Material Technology Inc. | Roller-membrane layering micro stereolithography |
| CN114364508A (en) * | 2019-09-11 | 2022-04-15 | Bae系统信息和电子系统集成有限公司 | 3D printing of high stiffness to weight ratio reflective optics |
| WO2022151539A1 (en) * | 2021-01-18 | 2022-07-21 | 青岛理工大学 | 3d printing device and method for integrated manufacturing of functionally gradient material and three-dimensional structure |
| US12251879B2 (en) | 2018-12-10 | 2025-03-18 | Bmf Nano Material Technology Co., Ltd. | Methods of controlling dimensions in projection micro stereolithography |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US12251879B2 (en) | 2018-12-10 | 2025-03-18 | Bmf Nano Material Technology Co., Ltd. | Methods of controlling dimensions in projection micro stereolithography |
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| US20210299952A1 (en) * | 2020-03-25 | 2021-09-30 | Bmf Material Technology Inc. | Roller-membrane layering micro stereolithography |
| CN111531881A (en) * | 2020-04-03 | 2020-08-14 | 湖南大学 | A multi-mode multi-material 3D printing device |
| WO2022151539A1 (en) * | 2021-01-18 | 2022-07-21 | 青岛理工大学 | 3d printing device and method for integrated manufacturing of functionally gradient material and three-dimensional structure |
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