CN109501245A - Photocuring 3D printing method based on pulsed exposure - Google Patents
Photocuring 3D printing method based on pulsed exposure Download PDFInfo
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- CN109501245A CN109501245A CN201811221790.0A CN201811221790A CN109501245A CN 109501245 A CN109501245 A CN 109501245A CN 201811221790 A CN201811221790 A CN 201811221790A CN 109501245 A CN109501245 A CN 109501245A
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- image
- photocuring
- printing method
- model
- pulsed
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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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
The invention discloses a kind of photocuring 3D printing methods based on pulsed exposure, including threedimensional model stratification step, cross-sectional image generation step, image projection step, pulsed step of exposure and release step.The photocuring 3D printing method based on pulsed exposure is substantially better than the printing effect of commonsense method, can be with the details of good presentation model, and details not windrow can clearly see print pixel point clearly, and serious overexposure phenomenon then occurs in common method.
Description
Technical field:
The present invention relates to rapid shaping technique field more particularly to a kind of photocuring 3D printing methods based on pulsed exposure.
Background technique:
The three-dimensional modeling data of components can be layered to obtain components in different height according to certain thickness by photocuring 3D printing
The tangent plane picture data of degree.Hereafter, the high image data of different layers is projected liquid photosensitive resin by pictcure generator, made
Then liquid photosensitive resin makes cured resin as being cured as thin layer on resin and air or resin carrying platform at interface
Thin layer is detached from former interface and mobile a certain distance, then new liquid light maleate resin fill up original position, pictcure generator
It projects next layer of image data and continues to solidify next layer of thin layer, this process is repeated, the thin layer after resin solidification
Layer accumulation is finally completed the printing of components.
Pictcure generator generally uses the slice of data display projection of DLP or LCD screen by components.It is photosensitive in order to improve
The curing rate of resin, pictcure generator can usually use powerful blue light or ultraviolet source.With the light of image projection
Power increases, and the curing reaction speed of photosensitive resin is accelerated, and the resin reaction speed to increase sharply brings serious side reaction,
The adhesion strength between bearing medium is not only increased, the significant shrinkage of resin can be also caused, brings the decline of printing precision, very
It falling off to will lead to model from print platform, printing being caused to fail.And violent reaction speed can discharge a large amount of heat,
The service life of pictcure generator such as LCD screen can be greatly reduced.In addition, from cost consideration, light source used by photocuring printer
It is not generally good source of parallel light, often comprising a large amount of nonparallel stray light components, as these are non-for the increase of optical power
Parallel light component will more easily as the liquid photosensitive resin semi-solid preparation of the non-effective projected area of data edges or consolidate part diagram
Change, on molded solidified resin surface, superposition solidifies: overproof so as to cause the decline and outer dimension of printing precision.
Summary of the invention:
The purpose of the present invention is, provide a kind of to realize that convenient, the fast precision of speed is high, off-type force is low in view of the drawbacks of the prior art
Photocuring 3D printing method based on pulsed exposure.
The present invention is achieved through the following technical solutions:
A kind of photocuring 3D printing method based on pulsed exposure, includes the following steps:
1) threedimensional model stratification step: part 3D model is first subjected to slicing delamination processing by Slice Software, by part model
Discrete is each cross-section data with same thickness；
2) image generation step: by pictcure generator according to each cross-section data of part model, the image in each section of part is generated；
3) image projects step: image being projeced on the interface of resin and transparent medium；
4) pulsed step of exposure: alternately playing part section image by certain frequency and the method for black background image is solid
Change photosensitive resin；
5) pulsed step of exposure: or effective directional light image projection is made by the method for certain frequency switching pictcure generator
The photosensitive resin solidification in region blocks mixed and disorderly astigmatism to sputter non-image projected area tree by certain frequency switching pictcure generator
Rouge solidification；
6) release step: mobile print platform is detached from cured model from resin plummer, is then return to the former height of distance
For the place of slice thickness, the sky for making fresh liquid photosensitive resin be filled into resin plummer and currently be completed between model
Between；
7) repeat step 2 to step 6), until thus model lamella printing is completed or print procedure is terminated.
In the preferred embodiment, in step 2, described image generator includes that can show image and allow
Light through image device LCD, can show image and by reflection by image projection come out device DLP or LCDS, can
By the device OLED by showing image in a manner of self luminous.
In the preferred embodiment, in step 4), part section image is alternately played in a cycle period
Time range be 10 ~ 100000ms；The time range that black background image is shown in a cycle period be 10 ~
100000ms；The opening time range of pictcure generator light source is 10 ~ 100000ms in a cycle period；It is recycled at one
The shut-in time range of pictcure generator light source is 10 ~ 100000ms in period.
In the preferred embodiment, in step 4), the opening and closing of described image generator light source pass through figure
Epideictic behaviour as generator itself or the luminescent behavior by light source itself block light source by machinery to realize.
In addition, it is necessary to explanation, pulse generation mode of the present invention is not limited to the modes such as PMW or relay reality
It is existing.
The beneficial effects of the present invention are: commonsense method should be substantially better than based on the photocuring 3D printing method that pulsed exposes
Printing effect, can be with the details of good presentation model, details not windrow can clearly see print pixel point clearly, and common
Then there is serious overexposure phenomenon in method.
Detailed description of the invention:
Fig. 1 is the flow diagram of the photocuring 3D printing method exposed the present invention is based on pulsed；
Fig. 2 is the threedimensional model schematic diagram of printing objects employed in the specific embodiment of the invention；
Fig. 3 is in the specific embodiment of the invention by the object of the method for the present invention printing and the comparison diagram of commonsense method printing objects.
Specific embodiment:
The preferred embodiments of the present invention will be described in detail below, so that advantages and features of the invention can be easier to by this field
Personnel's understanding, so as to make a clearer definition of the protection scope of the present invention.
Embodiment:
As shown in Figure 1, the photocuring 3D printing method of the invention based on pulsed exposure includes threedimensional model stratification step, cuts
Face image generation step, image projection step, pulsed step of exposure and release step, concrete operations process are as follows:
(1) the STL formatted file of Fig. 2 institute representation model is imported into Slice Software, model is divided with the thickness of 0.05mm
Layer operation；
(2) every tomographic image exposure total time is set as xxx ms, and is divided into total exposure time by way of switching light sources
It lighting time and turns off the light the time, is disposed as 100ms, constantly circulation is until reaching set exposure total time total time；
(3) release height is set as xxx mm, and cured model is made to be detached from carrying platform after exposure；
(4) so that the print platform of printer is lowered back to release preceding height and add the place of thickness, and prepare the exposure of next tomographic image
Light；
(5) step 2-4 is repeated, until all lamellas are completed in printing；
(6) when being printed using commonsense method, total time for exposure is set as xxx ms in step 2, closes after persistently exposing the time
Black out source.
Using the result of 2 representation models of commonsense method and the method for the invention printed drawings as shown in figure 3, as seen from the figure,
The present invention is substantially better than the printing effect of commonsense method using the printing effect of pulsed exposure method, can be with good representative model
The details of type, details not windrow can clearly see print pixel point clearly, and serious overexposure then occur existing for common method
As large area bottom is detached from displacement, gully bottom detail windrow.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.
Claims (7)
1. a kind of photocuring 3D printing method based on pulsed exposure, which comprises the steps of:
1) threedimensional model is layered: part 3D model first being carried out slicing delamination processing, obtains each cross-section data of part model；
2) cross-sectional image generates: by pictcure generator according to each cross-section data of part model, generating the image in each section of part；
3) image projects: image being projeced on the interface of resin and carrying platform；
4) pulsed exposes: alternately playing part section image by certain frequency and the method for black background image solidifies tree
Rouge；Or the method solidified resin of the light source by certain frequency switching pictcure generator；
5) release: mobile print platform is detached from cured model from resin plummer, is then return to the former height of distance to cut
The place of piece thickness, the space for making fresh liquid photosensitive resin be filled into resin plummer and currently be completed between model；
6) step 2 is repeated to step 5), until printing is completed or print procedure is terminated in all model lamellas.
2. the photocuring 3D printing method according to claim 1 based on pulsed exposure, which is characterized in that step 2
In, described image generator includes that can show image and light is allowed to penetrate the device LCD of image, can show image and lead to
Cross reflection by device DLP or LCDS that image projection comes out, the device OLED of image can be shown by self luminous mode.
3. the photocuring 3D printing method according to claim 1 based on pulsed exposure, which is characterized in that step 4)
In, the time range that part section image is alternately played in a cycle period is 10 ~ 100000ms.
4. the photocuring 3D printing method according to claim 3 based on pulsed exposure, which is characterized in that step 4)
In, the time range that black background image is shown in a cycle period is 10 ~ 100000ms.
5. the photocuring 3D printing method according to claim 4 based on pulsed exposure, which is characterized in that step 4)
In, the opening time range of pictcure generator light source is 10 ~ 100000ms in a cycle period.
6. the photocuring 3D printing method according to claim 5 based on pulsed exposure, which is characterized in that step 4)
In, the shut-in time range of pictcure generator light source is 10 ~ 100000ms in a cycle period.
7. the photocuring 3D printing method based on pulsed exposure described according to claim 1 or 5 or 6, which is characterized in that step
It is rapid 4) in, the opening and closing of described image generator light source by the epideictic behaviour of pictcure generator itself or pass through light source sheet
The luminescent behavior of body blocks light source by machinery to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811221790.0A CN109501245A (en) | 2018-10-19 | 2018-10-19 | Photocuring 3D printing method based on pulsed exposure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811221790.0A CN109501245A (en) | 2018-10-19 | 2018-10-19 | Photocuring 3D printing method based on pulsed exposure |
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| CN109501245A true CN109501245A (en) | 2019-03-22 |
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| CN201811221790.0A Pending CN109501245A (en) | 2018-10-19 | 2018-10-19 | Photocuring 3D printing method based on pulsed exposure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111196036A (en) * | 2020-01-09 | 2020-05-26 | 深圳优维度科技股份有限公司 | Method and system for dynamically adjusting light intensity of light source of 3D printer |
| CN114643714A (en) * | 2020-12-19 | 2022-06-21 | 深圳市创想三维科技有限公司 | Photocuring 3D printing method, electronic device and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09207228A (en) * | 1996-02-06 | 1997-08-12 | Toshiba Corp | Optically shaping device |
| CN1769032A (en) * | 2004-10-29 | 2006-05-10 | 谭昊涯 | Quick forming method by adoption of projection technique |
| US20130056910A1 (en) * | 2010-05-11 | 2013-03-07 | Fraunhofer-Gesellschaft Zur Foederung Der Angewandten Forschung E. V. | Device and method for producing three-dimensional structures |
-
2018
- 2018-10-19 CN CN201811221790.0A patent/CN109501245A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09207228A (en) * | 1996-02-06 | 1997-08-12 | Toshiba Corp | Optically shaping device |
| CN1769032A (en) * | 2004-10-29 | 2006-05-10 | 谭昊涯 | Quick forming method by adoption of projection technique |
| US20130056910A1 (en) * | 2010-05-11 | 2013-03-07 | Fraunhofer-Gesellschaft Zur Foederung Der Angewandten Forschung E. V. | Device and method for producing three-dimensional structures |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111196036A (en) * | 2020-01-09 | 2020-05-26 | 深圳优维度科技股份有限公司 | Method and system for dynamically adjusting light intensity of light source of 3D printer |
| CN114643714A (en) * | 2020-12-19 | 2022-06-21 | 深圳市创想三维科技有限公司 | Photocuring 3D printing method, electronic device and storage medium |
| CN114643714B (en) * | 2020-12-19 | 2024-05-17 | 深圳市创想三维科技有限公司 | Photo-curing 3D printing method, electronic device and storage medium |
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