CN108790150B - 3D printing system and 3D printing method - Google Patents
3D printing system and 3D printing method Download PDFInfo
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- CN108790150B CN108790150B CN201710282261.0A CN201710282261A CN108790150B CN 108790150 B CN108790150 B CN 108790150B CN 201710282261 A CN201710282261 A CN 201710282261A CN 108790150 B CN108790150 B CN 108790150B
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- 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
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- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
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- 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
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- 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
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Abstract
The utility model provides a 3D printing system, including feed arrangement, print platform and image device, feed arrangement includes transparent conveyer belt, first feed jar and first scraper, first feed jar can be with the printing material emission on transparent conveyer belt, the cutting edge of first scraper sets up with transparent conveyer belt is relative, first scraper can scribble the printing material and strike the leveling, transparent conveyer belt can transport the printing material to print platform's surface, image device can produce the pattern light of shining the printing material, make the printing material solidify for the printing entity on print platform. The 3D printing system can coat printing materials layer by layer, can realize mixed printing of various materials, and has great significance for biological application. The invention further relates to a 3D printing method.
Description
Technical Field
The invention relates to the technical field of 3D printing, in particular to a 3D printing system and a 3D printing method.
Background
The 3D printing technology is used as a prospective and strategic technology and has important application in the high-end fields of aerospace, biomedical, weaponry, automobiles, molds and the like.
Particularly in the field of biological medical treatment, the 3D printing technology provides a new flexible preparation method for biochips and biochemical devices, also provides a new research means and platform for the fields of biological materials and artificial organs, and realizes the manufacture of complex 3D carrier supports. However, the existing 3D printing technology still has difficulty in meeting application requirements in terms of printing precision and printing breadth. Aiming at the field of biological application, the 3D printing technology still does not effectively solve the problem that the printing precision and the printing size cannot be considered at the same time. On one hand, the stereolithography based on two-photon or laser direct writing can realize printing of complex structures as small as 0.1 micron, but is limited by the printing size (less than several hundred microns) and is not suitable for biochip fabrication. On the other hand, the stereolithography based on projection type is limited by the printing precision (greater than 30 μm) and is difficult to satisfy the requirement of fabricating the micro structure in the biochip. Currently, the lateral resolution of commercial 3D printers is only 50 microns, and the depth resolution is about 50-100 microns. Meanwhile, the surface roughness of the biochip printed by the existing 3D printing technology is large, and inconvenience is brought to biological detection. Considering biodiversity, a single material cannot meet the requirements of design and fabrication of a biological device.
Disclosure of Invention
The invention aims to provide a 3D printing system which can coat printing materials layer by layer, can realize mixed printing of multiple materials and has great significance for biological application.
The technical problem to be solved by the invention is realized by adopting the following technical scheme.
The utility model provides a 3D printing system, including feed arrangement, print platform and image device, feed arrangement includes transparent conveyer belt, first feed jar and first scraper, first feed jar can be with the printing material emission on transparent conveyer belt, the cutting edge of first scraper sets up with transparent conveyer belt is relative, first scraper can scribble the printing material and strike the leveling, transparent conveyer belt can transport the printing material to print platform's surface, image device can produce the pattern light of shining the printing material, make the printing material solidify for the printing entity on print platform.
In a preferred embodiment of the present invention, the feeding device further includes a releasing reel and a retracting reel, two ends of the transparent conveying belt are respectively wound on the releasing reel and the retracting reel, and the printing platform is disposed above the transparent conveying belt and between the releasing reel and the retracting reel.
In a preferred embodiment of the present invention, the feeding device further includes a plurality of first tensioning wheels, a plurality of second tensioning wheels, and a driving roller, the plurality of first tensioning wheels are disposed near the unwinding disc, the plurality of second tensioning wheels are disposed near the winding disc, the driving roller is disposed between the second tensioning wheels and the winding disc, the transparent conveying belt sequentially passes through the first tensioning wheels, the second tensioning wheels, and the driving roller can drive the transparent conveying belt to move toward the direction near the winding disc.
In a preferred embodiment of the present invention, the feeding device further includes a residual material curing lamp, the residual material curing lamp is disposed above the transparent conveyor belt, and the residual material curing lamp can emit ultraviolet light to cure the printing material remaining after printing.
In a preferred embodiment of the present invention, the feeding device further includes a second feeding tank for discharging the printing material onto the transparent belt, and a second scraper having a cutting edge disposed opposite to the transparent belt for scraping the printing material, wherein the printing material discharged from the second feeding tank is different from the printing material discharged from the first feeding tank.
In a preferred embodiment of the present invention, the imaging device includes a light source, a beam shaper, a spatial light modulator, a plurality of mirrors, and a projection lens, wherein the beam shaper is configured to shape a light beam emitted from the light source; the spatial light modulator is used for generating pattern light from the shaped light beam; the reflecting mirror is used for reflecting the pattern light to the projection lens, the projection lens is arranged opposite to the printing platform, and the projection lens can project the planar pattern light on the printing material.
In a preferred embodiment of the present invention, the imaging device further includes a computer and a controller, the computer is configured to provide displacement data and a pattern file obtained by dividing the exposure data into a series of strips, and send the displacement data and the pattern file to the controller, the controller uploads the pattern file to the spatial light modulator in time sequence, so that the spatial light modulator generates pattern light, and the controller controls the projection lens to move along the plane direction of the transparent conveyor belt through the displacement data.
In a preferred embodiment of the present invention, the imaging device further includes a CCD monitoring system, the CCD monitoring system is configured to monitor a printing condition of the printing platform and send the image to the computer, and the controller controls the CCD monitoring system and the projection lens to move synchronously through the displacement data.
In a preferred embodiment of the present invention, the imaging device further includes a photodetector, the photodetector is configured to collect light reflected by a surface of the printing material and send generated profile data to the controller, and the controller adjusts a projection focal length of the projection lens according to the profile data.
Another object of the present invention is to provide a 3D printing method, which can coat a printing material layer by layer, can realize mixed printing of multiple materials, and has great significance for biological applications.
A3D printing method, the 3D printing method comprising the steps of:
providing a feeding device, wherein the feeding device comprises a transparent conveyor belt, a first feeding tank and a first scraper, the first feeding tank is used for discharging the printing material onto the transparent conveyor belt, and the first scraper is used for scraping the printing material evenly;
providing a printing platform, and conveying a printing material to the surface of the printing platform by using a transparent conveyor belt; and
and providing an imaging device, generating pattern light by using the imaging device, irradiating the pattern light on the printing material, and curing the printing material on the printing platform to form a printing entity.
The feeding device of the 3D printing system comprises a transparent conveyor belt, a first feeding tank and a first scraper, wherein the first feeding tank can discharge printing materials on the transparent conveyor belt, the cutting edge of the first scraper is arranged opposite to the transparent conveyor belt, the first scraper can scrape the printing materials flat, the transparent conveyor belt can convey the printing materials to the surface of a printing platform, and an imaging device can generate pattern light irradiating the printing materials to enable the printing materials to be solidified into a printing entity on the printing platform. The 3D printing system disclosed by the invention can realize mixed printing of various materials by coating the printing materials layer by layer, and has a great significance for biological application.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are specifically described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of the structure of a 3D printing system of the present invention.
Fig. 2 is a flow chart illustrating a 3D printing method of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the 3D printing system and the 3D printing method according to the present invention with reference to the accompanying drawings and preferred embodiments is as follows:
the foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings. While the present invention has been described in connection with the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and specific embodiments thereof.
Fig. 1 is a schematic diagram of the structure of a 3D printing system of the present invention. As shown in fig. 1, in the present embodiment, the 3D printing system 10 includes a feeding device 12, a printing platform 14, and an imaging device 16.
Specifically, the feeding device 12 includes a transparent transfer belt 121, a releasing reel 122, a taking-up reel 123, a plurality of first tension wheels 124a, a plurality of second tension wheels 124b, a driving roller 125, a residue curing lamp 126, a first supply tank 127a, a first scraper 127b, a second supply tank 128a, a second scraper 128b, and a transparent carrier plate 129.
The transparent transfer belt 121 is made of a material that is light-permeable, i.e., light can pass through the transparent transfer belt 121. In the present embodiment, the transparent transfer belt 121 is disposed in a horizontal direction, and both ends of the transparent transfer belt 121 are wound on the unwinding reel 122 and the take-up reel 123, respectively.
The payout reel 122 is used to output the transparent conveyance belt 121 outward. In this embodiment, the releasing reel 122 is connected to a motor, and the releasing reel 122 is driven by the motor to output the transparent conveying belt 121 outwards at a constant speed.
The take-up reel 123 is used to take up the transparent conveyance belt 121. In this embodiment, the take-up reel 123 is connected to a motor, and the take-up reel 123 takes up the transparent conveying belt 121 at a constant speed by the motor drive.
A plurality of first tension wheels 124a are disposed adjacent to the payout reel 122, and the transparent transfer tape 121 is sequentially wound around the first tension wheels 124 a. In this embodiment, the feeding device 12 has three first tensioning wheels 124a, two of the first tensioning wheels 124a are fixedly arranged, and the other first tensioning wheel 124a can tension the transparent conveyor belt 121 in a direction perpendicular to the transparent conveyor belt 121, so as to ensure that the transparent conveyor belt 121 is always in a horizontal state. It should be noted that the number of the first tensioning wheels 124a is not limited to three, and can be freely increased or decreased according to actual needs.
A plurality of second tension pulleys 124b are disposed near the take-up reel 123, and the transparent transfer belt 121 is wound on the second tension pulleys 124b in sequence. In this embodiment, the feeding device 12 has three second tensioning wheels 124b, two of the second tensioning wheels 124b are fixedly disposed, and the other second tensioning wheel 124b can tension the transparent conveyor belt 121 in a direction perpendicular to the transparent conveyor belt 121, so as to ensure that the transparent conveyor belt 121 is always in a horizontal state. It should be noted that the number of the second tensioning wheels 124b is not limited to three, and can be freely increased or decreased according to actual needs.
The driving roller 125 is disposed between the second tension wheel 124b and the take-up reel 123, and the driving roller 125 may drive the transparent transmission belt 121 to move toward the take-up reel 123. In this embodiment, the driving roller 125 includes two driving rollers which are symmetrical up and down, and both surfaces of the transparent transfer belt 121 are in contact with the two driving rollers, respectively.
The residue curing lamp 126 is disposed above the transparent conveyor belt 121, and the residue curing lamp 126 can emit printing materials remaining after ultraviolet light curing printing.
The first supply tank 127a is arranged above the transparent conveyor belt 121; the first supply tank 127a is used to store printing material. The bottom of the first feeding tank 127a is provided with a discharge opening, and the discharge opening is opposite to the transparent conveyor belt 121; the first supply tank 127a is also provided with a piston, and the printing material is provided below the piston. In this embodiment, the first supply tank 127a may press the printing material by the piston, so that the printing material is discharged on the transparent transfer belt 121 through the discharge opening. It is worth mentioning that the printing material on the transparent belt 121 needs to be scraped into a flat film shape, and in order to ensure that the area of the film is large enough, the first supply tank 127a is moved in the width direction of the transparent belt 121 when the printing material is discharged, so that the printing material is discharged onto the transparent belt 121 in a strip shape.
The first scraper 127b is disposed at one side of the first supply tank 127a and above the transparent conveyor belt 121, the cutting edge of the first scraper 127b is disposed opposite to the transparent conveyor belt 121, and the length direction of the cutting edge of the first scraper 127b is parallel to the width direction of the transparent conveyor belt 121. The first blade 127b can scrape the printing material flat, and the distance between the blade edge of the first blade 127b and the transparent transfer belt 121 is equal to the film thickness of the printing material. In this embodiment, the first scraper 127b can move toward the transparent conveyor belt 121 until a set distance is reached, and when the transparent conveyor belt 121 carries the printing material past the first scraper 127b, the printing material is scraped flat. It should be noted that the process of scraping the printing material is not limited to the above-mentioned manner, for example, the transparent conveyor belt 121 is fixed, and the first scraper 127b is driven to reciprocate along the length direction of the transparent conveyor belt 121 to scrape the printing material.
The second supply tank 128a is disposed above the transparent conveyor belt 121 and on one side of the first supply tank 127 a; the second supply tank 128a is used to store printing material. The bottom of the second feeding tank 128a is provided with a discharge port, and the discharge port is opposite to the transparent conveyor belt 121; a piston is also provided on the second supply tank 128a, and printing material is provided below the piston. In this embodiment, the second supply tank 128a may press the printing material by the piston to discharge the printing material on the transparent transfer belt 121 through the discharge opening, and the printing material discharged from the second supply tank 128a is different from the printing material discharged from the first supply tank 127 a. It is worth mentioning that the printing material on the transparent belt 121 needs to be scraped into a flat film shape, and in order to ensure that the area of the film is large enough, the second supply tank 128a is moved in the width direction of the transparent belt 121 when the printing material is discharged, so that the printing material is discharged onto the transparent belt 121 in a strip shape.
The second scraper 128b is disposed at one side of the second supply tank 128a and above the transparent conveyor belt 121, the cutting edge of the second scraper 128b is disposed opposite to the transparent conveyor belt 121, and the length direction of the cutting edge of the second scraper 128b is parallel to the width direction of the transparent conveyor belt 121. The second blade 128b can smooth the printing material, and the distance between the blade edge of the second blade 128b and the transparent transfer belt 121 is equal to the film thickness of the printing material. In this embodiment, the second blade 128b can move toward the transparent conveyor belt 121 until a predetermined distance is reached, and the printing material is spread when the transparent conveyor belt 121 carries the printing material past the second blade 128 b. It should be noted that the process of scraping the printing material is not limited to the above-mentioned manner, for example, the transparent conveyor belt 121 is fixed, and the second scraper 128b is driven to move back and forth along the length direction of the transparent conveyor belt 121 to scrape the printing material. The feeding device 12 of the invention is provided with two feeding tanks and scrapers, the number of the feeding tanks and the scrapers can be more than or equal to 3, and the feeding tanks and the scrapers can be freely increased and decreased according to actual needs.
The printing platform 14 is disposed above the transparent conveying belt 121 and between the releasing reel 122 and the retracting reel 123, and a printing surface of the printing platform 14 is disposed opposite to the transparent carrier plate 129. The printing platform 14 can move toward or away from the transparent conveyor belt 121, and when 3D printing is performed, the printing platform 14 moves toward the transparent conveyor belt 121 until the printing surface of the printing platform 14 comes into contact with the printing material.
An imaging device 16 is disposed below the feeding device 12, and the imaging device 16 generates pattern light for irradiating the printing material to solidify the printing material into a printing entity on the printing platform 14. In the present embodiment, the imaging device 16 includes a light source 161a, a beam shaper 162, a spatial light modulator 163, a multi-block mirror 164 and a projection lens 165, a computer 166, a controller 167, a CCD monitoring system 168, a photodetector 169, and a focus measuring light source 161 b.
The light source 161a is used to provide printing light required at the time of printing. In the present embodiment, the light source 161a of the imaging device 16 is, for example, an LED lamp, but the invention is not limited thereto.
The beam shaper 162 serves to shape the light emitted from the light source 161 a. In this embodiment, the beam shaper 162 may shape the light into a flat-topped beam.
The spatial light modulator 163 generates the shaped light into pattern light. In this embodiment, the spatial light modulator 163 may display a print pattern, and pattern light may be generated when the shaped light passes through the spatial light modulator 163.
The mirror 164 is used to reflect the shaped light to the spatial light modulator 163 and to reflect the pattern light to the projection lens 165.
The projection lens 165 is disposed opposite to the printing platform 14, and the projection lens 165 is disposed below the transparent object plate 129, and the projection lens 165 can project the planar pattern light on the printing material.
The computer 166 is used to provide displacement data and a pattern file that segments the exposure data into a series of long stripes and sends the displacement data and pattern file to the controller 167. In the present embodiment, the computer 166 may divide the exposure data into a series of long pattern files (BMP files) having a width equal to or smaller than the width pixels of the spatial light modulator 163.
The controller 167 is configured to control the various components in the imaging device 16 to perform coordination, such as data import, motion synchronization control, focus control, and the like. Specifically, the controller 167 uploads the pattern file to the spatial light modulator 163 according to the received pattern file timing sequence, and the spatial light modulator 163 can sequentially display the print pattern, so that the shaped light beam generates the corresponding pattern light beam when passing through the spatial light modulator 163. The controller 167 also controls the projection lens 165 to move along the length direction of the transparent belt 121 according to the received displacement data. In this embodiment, the imaging device 16 of the present invention uses a timing synchronization technique, each time the spatial light modulator 163 emits a pattern light for printing, the pattern file is shifted by a certain pixel on the spatial light modulator 163, and another pattern light is emitted correspondingly, and the controller 167 controls the projection lens 165 to move by a certain distance according to the received displacement data.
The CCD monitoring system 168 is used for monitoring the printing condition of the printing platform 14, and sending the image to the computer 166, and displaying the printing image by the computer 166 to monitor the printing condition in real time. In this embodiment, the controller 167 further controls the CCD monitoring system 168 and the projection lens 165 to move synchronously according to the received displacement data, so as to ensure that the CCD monitoring system 168 can accurately monitor the printed image.
The photodetector 169 is used for collecting light reflected by the surface of the printing material and sending the shape data generated by the printing material to the controller 167, and the controller 167 adjusts the projection focal length of the projection lens 165 according to the shape data.
The focus measurement light source 161b is used to provide a light source before 3D printing, thereby adjusting the focal length of the projection lens 165. The light emitted by the focus measuring light source 161b is reflected to the projection lens 165 and the photoelectric detector 169 through the plurality of reflectors 164, the projection lens 165 projects on the surface of the transparent conveyor belt 121, meanwhile, the photoelectric detector 169 collects the light reflected by the surface of the transparent conveyor belt 121 and sends the generated profile data to the controller 167, and the controller 167 adjusts the projection focal length of the projection lens 165 according to the profile data.
The 3D printing system 10 of the present invention uses the spatial light modulator 163 to emit pattern light, and the spatial light modulator 163 controls the brightness of the output light by the deflection of the liquid crystal molecules, so that the brightness of the projection light in different areas in the same plane is controlled, and the requirements of 3D printed products in different shapes in the same cross section can be met. The spatial light modulator 163 has a control precision reaching a pixel level, a printing precision is high, a two-dimensional structure precision of 8um and a thickness precision of 6um can be realized, a specific requirement of a biological device on a molding size (for example, the size of a microfluidic biological device is 1-4 inches) can be well met, and a technical platform with innovation significance is provided for the design of the biological device and the research in the field of biological medicines. Moreover, the spatial light modulator 163 generates corresponding pattern light according to the received pattern file sequence, the light projected on the printing material by the projection lens 165 is the surface light source 161a, and simultaneously the projection lens 165 moves along the length direction of the transparent conveyor belt 121, thereby realizing large-format projection scanning exposure and having higher printing speed. In addition, the 3D printing system 10 of the present invention can realize mixed printing of multiple materials by applying printing materials layer by layer, which is of great significance for biological applications, for example, in the case of 3D printing simulating human ears, mixed printing of cartilage-like materials and muscle-like materials is required, the cartilage-like materials can be supplied by the first supply tank 127a, the muscle-like materials can be supplied by the second supply tank 128a, and the mixed printing can be realized by controlling the sequential supply of the first supply tank 127a and the second supply tank 128a during 3D printing.
Fig. 2 is a flow chart illustrating a 3D printing method of the present invention. Referring to fig. 1 and 2, the 3D printing method of the present invention utilizes a 3D printing system 10 to perform 3D printing, and the steps of the 3D printing method include:
providing a feeding device 12, wherein the feeding device 12 comprises a transparent conveyor belt 121, a first supply tank 127a, a first scraper 127b, a second supply tank 128a and a second scraper 128b, the printing material is discharged onto the transparent conveyor belt 121 by the first supply tank 127a, the printing material is scraped and leveled by the first scraper 127b, or the printing material is discharged onto the transparent conveyor belt 121 by the first supply tank 127a in a time sequence, the printing material is scraped and leveled by the first scraper 127b, the printing material is discharged onto the transparent conveyor belt 121 by the second supply tank 128a in a time sequence, and the printing material is scraped and leveled by the second scraper 128b, wherein the printing material discharged from the first supply tank 127a is different from the printing material discharged from the second supply tank 128 a;
providing a printing platform 14, and conveying printing materials to the surface of the printing platform 14 by using a transparent conveyor belt 121; and
an imaging device 16 is provided, and pattern light is generated by the imaging device 16, so that the pattern light is irradiated on the printing material, and the printing material is solidified into a printing entity on the printing platform 14. Specifically, the imaging device 16 includes a light source 161a, a beam shaper 162, a spatial light modulator 163, a plurality of mirrors 164 and a projection lens 165, a computer 166, a controller 167, a CCD monitoring system 168, a photodetector 169, and a focus measuring light source 161 b.
Shaping the light emitted from the light source 161a by using a beam shaper 162;
providing, with the computer 166, displacement data and a pattern file that segments the exposure data into a series of long stripes, and sending the displacement data and the pattern file to the controller 167;
uploading a pattern file to the spatial light modulator 163 by using the controller 167, so that the spatial light modulator 163 displays a print pattern, and the shaped light generates corresponding pattern light when passing through the spatial light modulator 163; meanwhile, the controller 167 controls the projection lens 165 to move along the length direction of the transparent conveyor belt 121 according to the displacement data, so as to realize large-scale projection scanning exposure;
the photoelectric detector 169 is used for collecting light rays reflected by the surface of the printing material, the appearance data generated by the printing material is sent to the controller 167, and the controller 167 adjusts the projection focal length of the projection lens 165 according to the appearance data;
the printing condition of the printing platform 14 is monitored by the CCD monitoring system 168, and the image is sent to the computer 166, and the printing image is displayed by the computer 166, so that the printing condition is monitored in real time.
The feeding device 12 of the 3D printing system 10 of the present invention includes a transparent conveyor belt 121, a first feeding tank 127a, and a first scraper 127b, wherein the first feeding tank 127a can discharge the printing material on the transparent conveyor belt 121, a cutting edge of the first scraper 127b is disposed opposite to the transparent conveyor belt 121, the first scraper 127b can scrape the printing material flat, the transparent conveyor belt 121 can convey the printing material to the surface of the printing platform 14, and the imaging device 16 can generate pattern light for irradiating the printing material to cure the printing material into a printing entity on the printing platform 14. The 3D printing system 10 of the present invention can realize mixed printing of multiple materials by coating the printing materials layer by layer, and is of great significance to biological applications.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (8)
1. A 3D printing system comprising a feeding device (12), a printing platform (14) and an imaging device (16), wherein the feeding device (12) comprises a transparent conveyor belt (121), a first feeding tank (127a) and a first scraper (127b), the first feeding tank (127a) can discharge printing material on the transparent conveyor belt (121), the cutting edge of the first scraper (127b) is arranged opposite to the transparent conveyor belt (121), the first scraper (127b) can scrape the printing material flat, the transparent conveyor belt (121) can convey the printing material to the surface of the printing platform (14), and the imaging device (16) can generate pattern light irradiating the printing material to solidify the printing material on the printing platform (14) into a printing entity;
the imaging device (16) comprises a light source (161a), a spatial light modulator (163), a plurality of mirrors (164), and a projection lens (165), the spatial light modulator (163) generating a light beam into pattern light; the reflecting mirror (164) is used for reflecting the pattern light to the projection lens (165), the projection lens (165) is arranged opposite to the printing platform (14), and the projection lens (165) can project the planar pattern light on a printing material;
the imaging device (16) further comprises a computer (166) and a controller (167), wherein the computer (166) is used for providing displacement data and a pattern file for dividing exposure data into a series of strips, and sending the displacement data and the pattern file to the controller (167), the controller (167) uploads the pattern file to the spatial light modulator (163) in time sequence, so that the spatial light modulator (163) generates pattern light, and the controller (167) controls the projection lens (165) to move along the plane direction of the transparent conveyor belt (121) through the displacement data; the imaging device (16) further comprises a photoelectric detector (169), the photoelectric detector (169) is used for collecting light rays reflected by the surface of the printing material and sending generated profile data to the controller (167), and the controller (167) adjusts the projection focal length of the projection lens (165) according to the profile data.
2. The 3D printing system of claim 1, wherein the feeding device (12) further comprises a releasing reel (122) and a retracting reel (123), both ends of the transparent transfer tape (121) are wound around the releasing reel (122) and the retracting reel (123), respectively, and the printing platform (14) is disposed above the transparent transfer tape (121) and between the releasing reel (122) and the retracting reel (123).
3. The 3D printing system of claim 2, wherein the feeding device (12) further comprises a plurality of first tension wheels (124a), a plurality of second tension wheels (124b), and a driving roller (125), the plurality of first tension wheels (124a) are disposed near the releasing reel (122), the plurality of second tension wheels (124b) are disposed near the taking-up reel (123), the driving roller (125) is disposed between the second tension wheels (124b) and the taking-up reel (123), the transparent conveying belt (121) passes through the first tension wheels (124a), the second tension wheels (124b), and the driving roller (125) in sequence, and the driving roller (125) can drive the transparent conveying belt (121) to move toward the direction near the taking-up reel (123).
4. The 3D printing system according to claim 1, wherein the feeding device (12) further comprises a residue curing lamp (126), the residue curing lamp (126) is disposed above the transparent conveyor belt (121), and the residue curing lamp (126) can emit ultraviolet light to cure the printing material remaining after printing.
5. The 3D printing system according to claim 1, wherein the feeding device (12) further comprises a second supply tank (128a) and a second scraper (128b), the second supply tank (128a) being adapted to discharge printing material onto the transparent conveyor belt (121), a cutting edge of the second scraper (128b) being arranged opposite the transparent conveyor belt (121), the second scraper (128b) being adapted to scrape printing material flat, the printing material discharged by the second supply tank (128a) being different from the printing material discharged by the first supply tank (127 a).
6. The 3D printing system of claim 1, wherein the imaging device (16) comprises a beam shaper (162), the beam shaper (162) being configured to shape the beam of light emitted by the light source (161 a).
7. The 3D printing system according to claim 1, wherein the imaging device (16) further comprises a CCD monitoring system (168), the CCD monitoring system (168) is configured to monitor a printing condition of the printing platform (14) and send an image to the computer (166), and the controller (167) controls the CCD monitoring system (168) to move synchronously with the projection lens (165) according to displacement data.
8. A3D printing method is characterized by comprising the following steps:
providing a feeding device (12), wherein the feeding device (12) comprises a transparent conveyor belt (121), a first feeding tank (127a) and a first scraper (127b), the printing material is discharged onto the transparent conveyor belt (121) by the first feeding tank (127a), and the printing material is scraped to be flat by the first scraper (127 b);
providing a printing platform (14), and conveying printing materials to the surface of the printing platform (14) by using the transparent conveyor belt (121); and
providing an imaging device (16), generating pattern light by using the imaging device (16), enabling the pattern light to irradiate the printing material, and enabling the printing material to be solidified into a printing entity on the printing platform (14);
the imaging device (16) comprises a light source (161a), a spatial light modulator (163), a plurality of reflecting mirrors (164) and a projection lens (165), wherein the spatial light modulator (163) is used for displaying a printing pattern, and light rays generate corresponding pattern light when passing through the spatial light modulator (163);
reflecting the pattern light to the projection lens (165) by the mirror (164);
projecting the planar pattern light onto a printing material by the projection lens (165);
the imaging device (16) further includes a computer (166) and a controller (167), with the computer (166) providing displacement data and a pattern file dividing the exposure data into a series of strips, and sending the displacement data and the pattern file to the controller (167);
uploading a pattern file to the spatial light modulator (163) by using the controller (167), enabling the spatial light modulator (163) to display a printing pattern, and enabling light rays to generate corresponding pattern light when passing through the spatial light modulator (163), wherein the controller (167) controls the projection lens (165) to move along the length direction of the transparent conveyor belt (121) according to displacement data;
the imaging device (16) further comprises a photoelectric detector (169), light reflected by the surface of the printing material is collected by the photoelectric detector (169), appearance data generated by the printing material is sent to the controller (167), and the controller (167) adjusts the projection focal length of the projection lens (165) according to the appearance data.
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| FR3070135B1 (en) * | 2017-08-18 | 2019-08-16 | S.A.S 3Dceram-Sinto | METHOD AND MACHINE FOR MANUFACTURING PARTS OF CERAMIC OR METALLIC MATERIAL BY THE TECHNIQUE OF ADDITIVE PROCESSES |
| US11433617B2 (en) | 2019-01-29 | 2022-09-06 | General Electric Company | Method and apparatus for process monitoring in additive manufacturing utilizing an image of a negative structure |
| CN109702854B (en) * | 2019-02-25 | 2021-04-13 | 中国科学院空间应用工程与技术中心 | 3D printing apparatus's system of paving |
| CN111844735A (en) * | 2019-04-25 | 2020-10-30 | 苏州苏大维格科技集团股份有限公司 | Laser direct writing and three-dimensional printing composite system and using method thereof |
| CN110935875B (en) * | 2019-11-27 | 2022-01-04 | 汕头大学 | Longitudinal belt type flexible powder spreading scraper |
| RU209858U1 (en) * | 2021-10-22 | 2022-03-23 | Общество с ограниченной ответственностью "СКАНИ" | 3D PRINTING TABLE DEVICE WITH AUTOMATIC PART REMOVAL CONVEYOR SYSTEM |
| WO2023068965A1 (en) * | 2021-10-22 | 2023-04-27 | Общество с ограниченной ответственностью "СКАНИ" | 3d printing table arrangement with an automatic conveyor system for removing articles |
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| JPH07164534A (en) * | 1993-12-14 | 1995-06-27 | Teijin Seiki Co Ltd | Method and device for optical molding |
| CN104802400A (en) * | 2014-01-28 | 2015-07-29 | 上海普利生机电科技有限公司 | Light curing 3D printing equipment and image exposure system |
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