CN110202784A - A kind of gray scale DLP Method of printing - Google Patents
A kind of gray scale DLP Method of printing Download PDFInfo
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- CN110202784A CN110202784A CN201910509463.3A CN201910509463A CN110202784A CN 110202784 A CN110202784 A CN 110202784A CN 201910509463 A CN201910509463 A CN 201910509463A CN 110202784 A CN110202784 A CN 110202784A
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- printing
- gray scale
- light
- exposure
- dlp
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Classifications
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- 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
- B29C64/129—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 characterised by the energy source therefor, e.g. by global irradiation combined with a mask
-
- 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
- B29C64/30—Auxiliary operations or equipment
- B29C64/386—Data acquisition or data processing for additive manufacturing
- B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
Abstract
The present invention provides a kind of gray scale DLP Method of printings, belong to 3D printing technique field.Gray scale DLP Method of printing is mainly to pass through the gray scale pictures that will be patterned into for the exposure projection in photocuring print procedure in the present invention, and the projection light of different gray scales has different exposure intensities, so under the identical time for exposure, so that the photo-curing material of different zones has the different degrees of cross linking in same layer, the region of specially low ash degree light exposure has the high degree of cross linking, and the region of high gray scale light exposure has the low degree of cross linking, for polymer, the difference of the degree of cross linking often leads to the difference of physicochemical property, to prepare functionally gradient material (FGM).
Description
Technical field
The present invention relates to photocuring 3D technology field more particularly to a kind of gray scale DLP Method of printings.
Background technique
3D printing technique, also referred to as increasing material manufacturing (Additive manufacturing), have been widely used at present
The fields such as the structuring molding of the materials such as polymer, ceramics, metal.The technology basic process are as follows: be pre-designed digitlization 3D mould
Type carries out slicing treatment to it using 3D printing control software, obtains one group of 2-D data information for corresponding to threedimensional model；So
2-D data information drives 3D printer afterwards, complete 3D solid is finally obtained by way of stack deposition, in view of the skill
The shaping characteristic of art unique " from bottom to top " makes it show significant advantage in complicated 3D entity is constructed.Traditional number
Word light processing (DLP) 3D printing technique is to pass through the slice information of 3D mathematical model to utilize digital light processing chip Xiang Guanggu
Change and projected in resin storage tank, and then cause corresponding photopolymerization reaction process, realizes entire 3D eventually by the mode of layer upon layer
Entity is constructed.For DLP as a kind of typical photocuring printing technique, advantage is that it precisely can quickly realize 3D object
Molding manufacture, be with a wide range of applications in actual scientific research, production.
Currently, in commercial DLP printer print procedure, due to each layer of exposing patterns luminous intensity having the same,
So that the photopolymerization reaction process of different zones does not have difference in each layer, the uniform entity of performance is finally printed.Compared to
Simple homogeneous material printing, will more be prepared to realize whole functionalized design at present by the gradient of material structure.
So developing a kind of technology that can be realized material gradient increasing material manufacturing has significant meaning.
Currently, DLP printing technique is more to realize the material of polymeric system, and the degree of cross linking of polymer would generally shadow
Ring the performance of material, such as mechanical performance, swelling behavior and light transmission etc..As a result, by design adjustment suitably at
Type mode controls the degree of cross linking of polymer, is the key point for preparing functionally gradient material (FGM).
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of gray scale DLP Method of printings.The present invention can be realized 3D gradient
Printing so that the entity of 3D printing realizes the gradient control of performance in regional area, and then realizes the functionalized design of material.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of gray scale DLP Method of printings, comprising the following steps:
According to the gray scale color standard in Photoshop software, it is based on scheduled 3D mathematical model, design has part ash
Spend the corresponding grey scale picture of variation；
The corresponding grey scale picture is imported in 3D printing control software, DLP printing is carried out.
Preferably, the gray scale color standard in the Photoshop software is the numerical value between 0~100%.
Preferably, the gray scale color standard in the Photoshop software is the numerical value between 0~80%.
Preferably, each layer of the 3D mathematical model has different greyscale patterns.
Preferably, the corresponding grey scale picture identifies that importing 3D printing controls in software by software.
Preferably, DLP printing the following steps are included:
Pattern-information obtained by software being controlled as the 3D printing is gradually invested in light-cured resin；
Seperation film of the objective table under the control of stepper motor every time with light-cured resin is bonded, and it is solid that gradation exposure causes light
Change reaction, the cured polymer of gained is sticked on objective table；
Successively printing, obtains 3D printing functionally gradient material (FGM).
Preferably, while the pattern-information is gradually invested in light-cured resin, the objective table is in stepper motor
Control moves down, and is bonded every time with the seperation film of light-cured resin.
Preferably, the gap between the objective table and seperation film is the printing thickness of printer setup, according to actual
Printing requires setting.
Preferably, the time of the gradation exposure is 2~30s.
The present invention provides a kind of gray scale DLP Method of printings, comprising the following steps: according to the ash in Photoshop software
Color standard is spent, scheduled 3D mathematical model is based on, designs the corresponding grey scale picture with local gray level variation；By the correspondence
Gray scale picture imports in 3D printing control software, carries out DLP printing.In the present invention gray scale DLP Method of printing mainly pass through by
Patterned gray scale pictures are for the exposure projection in photocuring print procedure, and different gray scales have different exposure intensities,
So under the identical time for exposure, so that the photo-curing material of different zones has the different degrees of cross linking in same layer, specifically
There is the high degree of cross linking for the region of low ash degree, and the region of high gray scale has the low degree of cross linking, for polymer, crosslinking
The difference of degree often leads to the difference of physicochemical property, to prepare functionally gradient material (FGM).Technical solution provided by the invention can have
The gradient distribution preparation of the realization material of effect, assigns material special physicochemical property.Gray scale DLP Method of printing provided by the invention is opened up
The application potential for having opened up traditional DLP technology is of great significance in terms of material functional designs preparation.With existing business
DLP printing technique is compared, and gray scale DLP Method of printing provided by the invention can readily realize the gradient distribution printing system of material
It is standby, and in part, accurately material property design aspect advantage is significant, has widened 3D printing technique and has prepared some functionality
The application range of component.
Detailed description of the invention
Fig. 1 is the schematic diagram of gray scale DLP Method of printing of the present invention；
Fig. 2 is the device figure of gray scale DLP Method of printing of the present invention；
Fig. 3 is to apply 3D printing functionally gradient material (FGM) made from example 1 to obtain under the emission mode that is all-trans of Fourier's infrared tester
Conversion ratio histogram；
Fig. 4 is the tensile property curve of 3D printing functionally gradient material (FGM) made from embodiment 1；
Fig. 5 is the pictorial diagram of the 3D printing material obtained with gradient of embodiment 3.
Specific embodiment
The present invention provides a kind of gray scale DLP Method of printings, comprising the following steps:
According to the gray scale color standard in Photoshop software, it is based on scheduled 3D mathematical model, design has part ash
Spend the corresponding grey scale picture of variation；
The corresponding grey scale picture is imported in 3D printing control software, DLP printing is carried out.
The present invention is based on scheduled 3D mathematical model according to the gray scale color standard in Photoshop software, and design has
The corresponding grey scale picture of local gray level variation.
In the present invention, the gray scale color standard in the Photoshop software is preferably the numerical value between 0~100%,
Numerical value between more preferably 0~80%, it is specific such as 0%, 10%, 20%, 30%, 50% or 70%.In the present invention, grey
The higher requirement that will lead to light-cured resin and be not able to satisfy photocuring printing of angle value.
In the present invention, the design is preferably digital editing.
In the present invention, each layer of the 3D mathematical model preferably has different greyscale patterns, to realize 3D ladder
Spend the design preparation of material.The present invention is not specifically limited the shapes and sizes of the greyscale pattern.
After obtaining corresponding grey scale picture, the present invention imports the corresponding grey scale picture in 3D printing control software, carries out
DLP printing.
In the present invention, the corresponding grey scale picture preferably identifies that importing 3D printing controls in software by software, to
Gray scale DLP printer is driven to complete whole printing process.
In the present invention, the DLP printing preferably includes following steps:
Pattern-information obtained by software being controlled as the 3D printing is gradually invested in light-cured resin；
Seperation film of the objective table under the control of stepper motor every time with light-cured resin is bonded, and it is solid that gradation exposure causes light
Change reaction, the cured polymer of gained is sticked on objective table；
Successively printing, obtains 3D printing functionally gradient material (FGM).
The present invention gradually invests the pattern-information as obtained by 3D printing control software in light-cured resin.The present invention
Special restriction is not done to the type of the light-cured resin, is required to use different photocuring trees according to the printing of actual sample
Rouge.
Seperation film of the objective table under the control of stepper motor every time with light-cured resin is bonded, and it is solid that gradation exposure causes light
Change reaction, the cured polymer of gained is sticked on objective table.In the present invention, during the gradation exposure, light-cured resin
In unsaturated monomer occur photocuring reaction under the action of auxiliary agent, generate polymer network.It is low under the identical time for exposure
The polymer of gray areas has high crosslink density, and the polymer of high gray areas has low crosslink density；In identical ash
The lower exposure of degree, long time for exposure make polymer have high crosslink density, and short exposure time makes polymer have low friendship
Join density.For polymer, the different degrees of cross linking is determined generally by the physicochemical property of material, usually shows mechanical property
Can, swelling behavior and translucency etc..
In the present invention, while the pattern-information is gradually invested in light-cured resin, the objective table is preferably in step
Control into motor moves down, and is bonded every time with the seperation film of light-cured resin.
In the present invention, the gap between the objective table and seperation film is preferably the printing thickness of printer setup, root
It requires to be arranged according to actual printing.
In the present invention, the light-cured resin is preferably disposed in light-cured resin slot, passes through Photoshop software design
Greyscale pattern is arranged exposure parameter, is then printed layer by layer on objective table.In print procedure, the single layer time for exposure is preferred
It for 2~30s, more preferably 15s, and is required according to the printing of actual sample and different light-cured resins, 2~30s's
Continuously regulate and control in range；It exposes gray scale preferably≤80%, and is required and different photocuring trees according to the printing of actual sample
Resin system continuously regulates and controls within the scope of 0~80% grey scale.In the present invention, two parameters of the time for exposure and gray scale
The properties of photocuring printed material can be regulated and controled with compatibility, it specifically can requirement according to printed sample and photocuring used
Resin system is regulated and controled.Time for exposure and exposure gray scale influence the physicochemical property of sample simultaneously.The present invention is to the exposure
It is not limited significantly between light time with the parameter area of exposure gray scale, is solely dependent upon the photocuring characteristic of corresponding light-cured resin.
Technical solution provided by the invention can be used for common photocuring hydrogel ink, engineering plastics ink, responsiveness
Intelligent macromolecule ink etc. is printed by gradient distribution and is prepared, traditional material system functional characteristic can be assigned, in intelligent meter circle
There is significant application value in the fields such as face, flexible electronic, soft robot and actuator.Specific side of the present invention to the application
Formula does not have particular/special requirement, using mode well known to those skilled in the art.
The device that the present invention uses the gray scale DLP Method of printing does not have special restriction, using those skilled in the art
Commercialization DLP printer known to member.
In order to further illustrate the present invention, gray scale DLP Method of printing provided by the invention is carried out below with reference to example detailed
It carefully describes, but they cannot be interpreted as limiting the scope of the present invention.
Fig. 1 is the schematic diagram of gray scale DLP Method of printing of the present invention；According to the gray scale color standard in Photoshop software,
Based on scheduled 3D mathematical model, after digital editing, corresponding grey scale picture (the 2D grayscale image with local gray level variation is designed
Piece), after the regulation of printing thickness, gradation exposure and exposure time parameter photocuring, low ash degree occur for 2D gray scale picture
The polymer of exposure area has high crosslink density, and the polymer of high gray scale exposure area has low crosslink density, through by
Layer printing, obtains 3D printing functionally gradient material (FGM).
Fig. 2 is the schematic device of gray scale DLP Method of printing of the present invention, including objective table, light-cured resin, photocuring tree
Rouge slot, obtains functionally gradient material (FGM).
Embodiment 1
A kind of laboratory is applied to gray scale DLP gradient of the invention from the general light-cured resin ground and prints.PEGDA is (poly-
Ethylene glycol), HEMA (methacrylic acid-beta-hydroxy ethyl ester), SPMA (methacrylic acid 3- sulphur methacrylate potassium salt) and8413 obtain presoma according to certain proportion, add a certain amount of photoinitiator and a small amount of dyestuff,
It is uniformly mixed, obtains photocuring stamping ink gel ink.Wherein, the mass fraction of PEGDA is that the mass fraction of 75%, HEMA is
15%,8413 mass fraction is 9%, and photoinitiator (Irgacure 819) mass fraction is 0.9% He
The mass fraction of beautiful uniformly dyeing material difficult to understand is 0.1%.By mechanical stirring Synchronous Heating to 50 DEG C, 2~3h of time, obtain uniformly limpid
Transparent hydrogel light-cured resin.
By infrared spectrum analysis double bond conversion rate, high conversion rate corresponds to high crosslink density, and conversion ratio is low to be corresponded to
Low crosslink density.Identical time for exposure 15s is selected, gray scale is from 0% to 30%, according to the gray scale color mark of Photoshop
Standard, value 0%, 10%, 20% and 30% separately design different gray scale pictures and print for gray scale DLP.
Prepared light-cured resin is placed in light-cured resin slot, pre-designed gray scale picture is imported into printing
The control software of machine, setting time for exposure are 15s, prepare four kinds of samples of different gradation exposures.In print procedure, printer
The fitting of the release film of objective table and resin storage tank, there are certain gap, the thickness as designed, then dynamic optical mode plate is to resin
Gray scale picture is projected in slot, causes photocuring reaction, so that photosensitive resin is solidificated on objective table, since the sample of preparation is used for
Infrared test, the pipe cured film that need to only prepare single layer can be used to test, and film thickness is about 100 μm.Utilize the infrared survey of Fourier
Try the emission mode that is all-trans of instrument.As shown in figure 3, under the 15s time for exposure, gray scale increases to 30% from 0%, double bond conversion rate from
72% drops to 56%, further illustrates that the degree of cross linking is gradually reduced.Double bond conversion rate test showed under the identical time for exposure, low
The region of gradation exposure has the high degree of cross linking, and the region of high gradation exposure has the low degree of cross linking.
Embodiment 2
There is regulatable mechanical performance in order to further illustrate by the preparation of gray scale DLP technology, tried using universal material
The machine of testing studies its tensile property.As shown in figure 4, identical time for exposure 15s, gray scale is from 0% to 30%, according to Photoshop
Gray scale color standard, value 0%, 10%, 20% and 30% prepares different Mechanics Performance Testing samples, sample respectively
Having a size of 50*5*0.3mm3, rate of extension 10mmmin-1.The result shows that under the identical time for exposure, with the increasing of gray scale
Add, degree of cross linking decline leads to the reduction of its tensile property.
Embodiment 3
There is gradient physicochemical property in order to further illustrate by the preparation of gray scale DLP technology, utilize the picture of shade of gray
Exposure preparation has the material of gradient, print parameters are as follows: and time for exposure 30s, fringe area gray scale are respectively 0%, 10%,
20%, 30%, 40%, 50%, 60%, 70% (from left to right), the gray scale in non-striped region is 0%.As shown in figure 5, table
It is bright to generate patterning since swelling mismatches under water induction using the photo-curing material, intuitively show that the technology can be realized
It is prepared by the printing of functionally gradient material (FGM).
The above is only a preferred embodiment of the present invention, it is not intended to limit the present invention in any form.It should
It points out, for those skilled in the art, without departing from the principle of the present invention, if can also make
Dry improvements and modifications, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (9)
1. a kind of gray scale DLP Method of printing, which comprises the following steps:
According to the gray scale color standard in Photoshop software, it is based on scheduled 3D mathematical model, there is local gray level to become for design
The corresponding grey scale picture of change；
The corresponding grey scale picture is imported in 3D printing control software, DLP printing is carried out.
2. Method of printing according to claim 1, which is characterized in that the gray scale color mark in the Photoshop software
Standard is the numerical value between 0~100%.
3. Method of printing according to claim 1 or 2, which is characterized in that the gray scale color in the Photoshop software
Standard is the numerical value between 0~80%.
4. Method of printing according to claim 1, which is characterized in that each layer of the 3D mathematical model has different
Greyscale pattern.
5. Method of printing according to claim 1, which is characterized in that the corresponding grey scale picture is identified by software and imported
3D printing controls in software.
6. Method of printing according to claim 1, which is characterized in that DLP printing the following steps are included:
Pattern-information obtained by software being controlled as the 3D printing is gradually invested in light-cured resin；
Seperation film of the objective table under the control of stepper motor every time with light-cured resin is bonded, and it is anti-that gradation exposure causes photocuring
It answers, the cured polymer of gained is sticked on objective table；
Successively printing, obtains 3D printing functionally gradient material (FGM).
7. Method of printing according to claim 6, which is characterized in that the pattern-information is gradually invested in light-cured resin
While, the objective table moves down under the control of stepper motor, is bonded every time with the seperation film of light-cured resin.
8. Method of printing according to claim 6, which is characterized in that the gap between the objective table and seperation film is to beat
The printing thickness of print machine setting requires to be arranged according to actual printing.
9. Method of printing according to claim 6, which is characterized in that the time of the gradation exposure is 2~30s.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110654028A (en) * | 2019-10-12 | 2020-01-07 | 上海联泰科技股份有限公司 | Three-dimensional object data layering processing method and 3D printing equipment |
| CN112519203A (en) * | 2020-12-02 | 2021-03-19 | 哈尔滨工业大学 | Efficient nondestructive supporting method for surface projection photocuring 3D printing based on gray level exposure |
| CN112936849A (en) * | 2020-10-16 | 2021-06-11 | 浙江大学杭州国际科创中心 | Preparation method and application of crystalline dynamic pattern based on photocuring molding |
| CN114261096A (en) * | 2021-12-29 | 2022-04-01 | 先临三维科技股份有限公司 | Partition exposure control method, printing method, device, equipment and medium |
-
2019
- 2019-06-13 CN CN201910509463.3A patent/CN110202784A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110654028A (en) * | 2019-10-12 | 2020-01-07 | 上海联泰科技股份有限公司 | Three-dimensional object data layering processing method and 3D printing equipment |
| WO2021068386A1 (en) * | 2019-10-12 | 2021-04-15 | 上海联泰科技股份有限公司 | Layered processing method of three-dimensional object data and 3d printing device |
| CN112936849A (en) * | 2020-10-16 | 2021-06-11 | 浙江大学杭州国际科创中心 | Preparation method and application of crystalline dynamic pattern based on photocuring molding |
| CN112519203A (en) * | 2020-12-02 | 2021-03-19 | 哈尔滨工业大学 | Efficient nondestructive supporting method for surface projection photocuring 3D printing based on gray level exposure |
| CN114261096A (en) * | 2021-12-29 | 2022-04-01 | 先临三维科技股份有限公司 | Partition exposure control method, printing method, device, equipment and medium |
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Application publication date: 20190906 |