CN112477121B - 3D printing system and 3D printing method - Google Patents

3D printing system and 3D printing method Download PDF

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Publication number
CN112477121B
CN112477121B CN202011162441.3A CN202011162441A CN112477121B CN 112477121 B CN112477121 B CN 112477121B CN 202011162441 A CN202011162441 A CN 202011162441A CN 112477121 B CN112477121 B CN 112477121B
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China
Prior art keywords
container
light
light emitting
slice
central axis
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CN202011162441.3A
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Chinese (zh)
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CN112477121A (en
Inventor
王臣
陈杰
孔祥建
刘金娥
秦锋
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Shanghai AVIC Optoelectronics Co Ltd
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Shanghai AVIC Optoelectronics Co Ltd
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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
    • B29C64/20—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
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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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)

Abstract

The invention discloses a 3D printing system and a 3D printing method. The 3D printing system includes: a container for containing a material to be solidified, the container having a first central axis; the curved surface light-emitting device comprises a light-emitting surface which is curved and is arranged around at least part of the periphery of the container; the rotation driving device is connected with the container and used for driving the container to rotate by taking the first central shaft as an axis; and the data processor is electrically connected with the curved surface light-emitting device and the rotation driving device, and can provide light-emitting control information for the curved surface light-emitting device and send rotation control information to the rotation driving device according to the slice information of the target printed object. According to the 3D printing system provided by the embodiment of the invention, the number of times of rotating the container in the printing process is reduced, and the container is not required to be rotated even when the light emitting surface of the curved surface light emitting device is arranged around the whole periphery of the container, so that the 3D printing efficiency is improved.

Description

3D printing system and 3D printing method
Technical Field
The invention relates to the field of three-dimensional (three dimensional, 3D) printing, in particular to a 3D printing system and a 3D printing method.
Background
3D printing is a rapid prototyping technology, which is a technology for constructing objects by using powdery metal, plastic, resin and other bondable or curable materials based on digital model files in a layer-by-layer printing, etching or curing mode.
The 3D printing technology can be broadly classified into a fused deposition modeling (Fused Deposition Modeling, FDM), a photo-curing modeling (Stereo Lithography Appearance, SLA), a digital light processing modeling (Digital Light Procession, DLP), and the like according to a modeling principle. The digital light processing molding 3D printing is a technology for curing the photosensitive resin by adopting digital projection.
In the case of a computer simulation of a 3D object, the shape of the object is calculated from a plurality of different angles, and the 2D image thus produced is then input to a slide projector. The projector projects a planar two-dimensional image into a container containing a photosensitive resin. By rotating the container, a plurality of planar two-dimensional images can cover the whole circumferential surface of the container, and after the photosensitive resin is cured, the complete 3D printing body is obtained. In the prior art, the container rotates a plurality of times and a plurality of planar two-dimensional images are handed over to each other, so that the surface quality of the printer is rough.
Disclosure of Invention
The invention provides a 3D printing system and a 3D printing method, which can improve printing efficiency and printing quality.
In a first aspect, an embodiment of the present invention provides a 3D printing system, including: a container for containing a material to be solidified, the container having a first central axis; the curved surface light-emitting device comprises a light-emitting surface which is curved and is arranged around at least part of the periphery of the container; the rotation driving device is connected with the container and used for driving the container to rotate by taking the first central shaft as an axis; and the data processor is electrically connected with the curved surface light-emitting device and the rotation driving device, and can provide light-emitting control information for the curved surface light-emitting device and send rotation control information to the rotation driving device according to the slice information of the target printed object.
In a second aspect, an embodiment of the present invention provides a 3D printing method for printing a target print object by the 3D printing system according to any one of the embodiments of the first aspect, the 3D printing method including: adding a material to be solidified into a container to obtain a multilayer virtual slice of a target printed matter, wherein the target printed matter is provided with a second central axis parallel to a first central axis of the container, the multilayer virtual slice is sequentially nested from the second central axis to the outer peripheral side of the target printed matter, the virtual slice overlapped with the second central axis is a columnar slice, and the virtual slice nested at the outer periphery of the columnar slice is a cylindrical slice; obtaining slice information of the corresponding virtual slice according to the unfolding pattern of each layer of virtual slice; acquiring luminous control information and rotation control information corresponding to each layer of virtual slice according to slice information corresponding to each layer of virtual slice; the curved surface light-emitting device is controlled to radiate light to the material to be solidified in the container through the light-emitting control information, and the rotation driving device is controlled to drive the container to rotate by taking the first central shaft as an axis through the rotation control information, so that the material to be solidified is solidified, and a physical slice corresponding to the virtual slice is obtained; and sequentially forming a plurality of layers of physical slices corresponding to the plurality of layers of virtual slices from the outer peripheral side of the first central axial container to obtain the target printed matter.
In a third aspect, an embodiment of the present invention provides a 3D printing system, including: a container for containing a material to be solidified, the container having a first central axis; the curved surface light-emitting device comprises a curved surface light-emitting surface, and the light-emitting surface is arranged around the whole periphery of the container; and the data processor is electrically connected with the curved surface light-emitting device and can provide light-emitting control information for the curved surface light-emitting device according to the slice information of the target printed matter.
In a fourth aspect, an embodiment of the present invention provides a 3D printing method for printing a target print object by the 3D printing system according to any one of the embodiments of the foregoing third aspect, the 3D printing method including: adding a material to be solidified into a container to obtain a multilayer virtual slice of a target printed matter, wherein the target printed matter is provided with a second central axis parallel to a first central axis of the container, the multilayer virtual slice is sequentially nested from the second central axis to the outer peripheral side of the target printed matter, the virtual slice overlapped with the second central axis is a columnar slice, and the virtual slice nested at the outer periphery of the columnar slice is a cylindrical slice; obtaining slice information of the corresponding virtual slice according to the unfolding pattern of each layer of virtual slice; acquiring luminous control information corresponding to each layer of virtual slice according to slice information corresponding to each layer of virtual slice; the curved surface light-emitting device is controlled to radiate light to the material to be solidified in the container through the light-emitting control information, so that the material to be solidified is solidified, and a physical slice corresponding to the virtual slice is obtained; and sequentially forming a plurality of layers of physical slices corresponding to the plurality of layers of virtual slices from the outer peripheral side of the first central axial container to obtain the target printed matter.
According to the 3D printing system and the 3D printing method provided by the embodiment of the invention, the curved surface light-emitting device is used for providing the light-emitting control information for the material to be solidified in the container, and the curved surface light-emitting device can irradiate the wider peripheral surface of the container relative to the plane projection device, so that the peripheral surface area of the container for receiving the light-emitting control information at each moment is increased, the rotation frequency of the container in the printing process is reduced, and even when the light-emitting surface of the curved surface light-emitting device is arranged around the whole periphery of the container, the container does not need to be rotated, thereby improving the 3D printing efficiency. In addition, the curved surface light-emitting device can irradiate the wider peripheral surface of the container at the same time, so that the phenomenon of rough surface quality generated by projection and handover of a plurality of plane projections when the plane projection device is adopted is avoided, and the quality of 3D printing is improved.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar features, and in which the figures are not to scale.
Fig. 1 is a schematic perspective view of a 3D printing system according to an embodiment of the present disclosure;
FIG. 2 is a schematic top view of a 3D printing system according to one embodiment of the present invention;
fig. 3 is a schematic perspective view of a curved light emitting device in a 3D printing system according to an embodiment of the present disclosure;
fig. 4 is a schematic perspective view of a 3D printing system according to an alternative embodiment of the present disclosure;
FIG. 5 is a schematic top view of a 3D printing system according to an alternative embodiment of the present invention;
fig. 6 is a schematic perspective view of a 3D printing system according to still another alternative embodiment of the present disclosure;
FIG. 7 is a schematic top view of a 3D printing system according to yet another alternative embodiment of the present invention;
fig. 8 is a schematic perspective view of a 3D printing system according to still another alternative embodiment of the present disclosure;
FIG. 9 is a schematic top view of a 3D printing system according to yet another alternative embodiment of the present invention;
fig. 10 is a schematic perspective view of a 3D printing system according to still another alternative embodiment of the present disclosure;
FIG. 11 is a flow chart of a 3D printing method provided in accordance with one embodiment of the present invention;
fig. 12 is a schematic perspective view of a 3D printing system according to another embodiment of the present disclosure;
FIG. 13 is a schematic top view of a 3D printing system according to another embodiment of the present invention;
fig. 14 is a flowchart of a 3D printing method according to another embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
It will be understood that when a layer, an area, or a structure is described as being "on" or "over" another layer, another area, it can be referred to as being directly on the other layer, another area, or another layer or area can be included between the layer and the other layer, another area. And if the component is turned over, that layer, one region, will be "under" or "beneath" the other layer, another region.
The embodiment of the invention provides a 3D printing system, wherein a material to be solidified is added into a container, and a target printed matter is finally obtained through selective layered solidification of the material to be solidified.
Fig. 1 is a schematic perspective view of a 3D printing system according to an embodiment of the present invention, and fig. 2 is a schematic top view of the 3D printing system according to an embodiment of the present invention. The 3D printing system 100 includes a container 110, a curved light emitting device 120, a rotation driving device 130, and a data processor 140.
The container 110 is for containing a material M1 to be solidified, and the container 110 has a first central axis CA1. Alternatively, the container 110 is a hollow cylindrical container, and the first central axis CA1 extends in the axial direction of the cylinder. The container 110 may be made of a light-transmitting material, for example, the container 110 is a glass to facilitate light transmission.
The curved light emitting device 120 includes a light emitting surface LS having a curved surface, the light emitting surface LS being disposed around at least a portion of the outer circumference of the container 110.
The rotation driving device 130 is connected to the container 110, and the rotation driving device 130 is used for driving the container 110 to rotate around the first central axis CA1.
The data processor 140 is electrically connected to the curved surface light-emitting device 120 and the rotation driving device 130, and the data processor 140 can provide light emission control information to the curved surface light-emitting device 120 and transmit rotation control information to the rotation driving device 130 according to the slice information of the target printed matter.
In the related art, a planar light source may be used as a light curing light source of the 3D printing system, for example, a planar projector is used as a light curing light source, and at any moment, the planar projector projects planar two-dimensional images into a container, so that in order to enable the projection to cover the whole circumferential surface of the container, a large number of two-dimensional images are required to be sequentially arranged along the circumferential direction of the container, and if the number of two-dimensional images is reduced, a wider angle is required to enable each two-dimensional image to cover the circumferential direction of the container, so that a significant distortion phenomenon of printed matter can be generated. When a planar light source is used as a light curing light source of the 3D printing system, the calculation process of 3D printing needs to consider the conversion between a two-dimensional image generated by the planar light source and a curved surface image projected on a circumferential curved surface of a container, so that the calculation complexity is improved and conversion errors are easy to generate.
According to the 3D printing system 100 of the embodiment of the present invention, the curved surface light emitting device 120 is used to provide the light emitting control information for the material M1 to be cured in the container 110, and the curved surface light emitting device 120 can simultaneously irradiate a wider peripheral surface of the container 110 relative to the planar projection device, so that the peripheral surface area of the container 110 receiving the light emitting control information at each moment is increased, the number of times of rotation of the container 110 in the printing process is reduced, and even when the light emitting surface LS of the curved surface light emitting device 120 is arranged around the whole periphery of the container 110, no rotation of the container 110 is required, thereby improving the efficiency of 3D printing. The curved surface light-emitting device 120 can irradiate the wider peripheral surface of the container 110 at the same time, so that the phenomenon of rough surface quality generated by projection and handover of a plurality of plane projections when a plane projection device is adopted is avoided, and the quality of 3D printing is improved. In the embodiment of the invention, the curved surface image provided by the luminous surface LS does not need to carry out projection conversion between the plane image and the curved surface image, so that the distortion problem caused by errors in projection conversion can be avoided, the printing quality of a target printed object in the circumferential direction is improved, and the possibility of edge defect is reduced.
Optionally, the 3D printing system further comprises a stage 150, the stage 150 comprising a mounting surface 151. The rotation driving device 130 and the data processor 140 are connected to the carrier 150. Optionally, at least part of the rotation driving device 130 is exposed to the mounting surface 151, and the bottom of the container 110 is connected to the rotation driving device 130, so that the rotation driving device 130 can drive the container 110 to rotate, the curved light emitting device 120 is mounted on the mounting surface 151 of the carrier 150, and the light emitting surface LS is perpendicular to the mounting surface 151. The electrical connection between the data processor 140 and the curved light emitting device 120 and the rotation driving device 130 may be realized through a signal line or may be realized by adopting a wireless communication mode. In this embodiment, the data processor 140 is connected to the carrier 150, and in other embodiments, the data processor 140 may be disposed away from the carrier 150, the curved light emitting device 120, the rotation driving device 130, etc., for example, integrated in another computer, and its physical position may be adjusted according to actual needs.
Fig. 3 is a schematic perspective view of a curved light emitting device in a 3D printing system according to an embodiment of the present invention. In some embodiments, the curved light emitting device 120 includes a flexible display panel 121, and the display panel 121 includes a plurality of light emitting elements PX arranged in an array on the light emitting surface LS. The display panel 121 may be a self-luminous flexible display panel 121, and the light emitting surface LS of the display panel 121 may be disposed around at least a portion of the outer circumference of the container 110 by using the flexible and bendable characteristics thereof, and when the outer circumference of the container 110 is of other shapes, the flexible display panel 121 may be bent into a shape matching the outer circumference of the container, thereby improving the shape plasticity of the light emitting surface LS, facilitating the matching of the containers 110 of various shapes, and improving the versatility and adjustability. By utilizing the self-luminous characteristics of the light emitting element PX, light with sufficient intensity can be provided to the material M1 to be cured in the container, and the amount of light received at each position in the circumferential direction of the material M1 to be cured can be controlled independently by the light emitting state of the corresponding light emitting element PX, thereby improving the precision of 3D printing.
Alternatively, the light emitting element PX is an ultraviolet light emitting element, for example, the wavelength of light emitted from the light emitting element PX is 355 nm to 420 nm, and ultraviolet light to near ultraviolet light is generated. When the light emitting element PX is an ultraviolet light emitting element, it can be used for curing and 3D printing of the material M1 to be cured having high sensitivity to ultraviolet light.
The light emitting element PX is a visible light emitting element, for example, the wavelength of light emitted from the light emitting element PX is 380 nm to 780 nm, and visible light is generated. When the light emitting element PX is a visible light emitting element, it can be used for curing and 3D printing of the material M1 to be cured having high sensitivity to visible light.
According to the sensitivity of the material to be cured M1 to light of a certain wavelength band, the material to be cured M1 can be irradiated by a light emitting element PX capable of emitting light of a corresponding wavelength band, so as to ensure the universality of the material to be cured M1 of the 3D printing system.
The light emitting element PX may be a light emitting diode (Light Emitting Diode, LED) or an organic light emitting diode (Organic Light Emitting Diode, OLED). Alternatively, the light emitting element PX includes a sub-millimeter light emitting diode (Mini-LED), a Micro light emitting diode (Micro-LED), a sub-millimeter organic light emitting diode (Mini-OLED), or a Micro light emitting diode (Micro-OLED). Herein, "micro" light emitting diodes, "sub-millimeter" light emitting diodes and other "micro" devices, "sub-millimeter" devices refer to the dimensions of light emitting diodes and devices, and in some embodiments, the term "micro" refers to the dimensions of devices on the scale of 1 micron to 100 microns, and the term "sub-millimeter" refers to the dimensions of devices on the scale of 100 microns to 1000 microns.
In some embodiments, the light emitting surface LS is a whole or partial cylindrical surface, the light emitting surface LS and the container 110 are coaxially arranged, and the distances from each point of the light emitting surface LS to the outer wall of the container 110 are equal, so that the light emitting surface LS can output uniform light quantity to each position in the circumferential direction of the container 110, and the uniformity of the light quantity of each position when each slice is printed is ensured, so that the molding quality of each slice is improved, and the printing quality of the obtained target printed product is further improved.
In the present embodiment, the display device 120 includes a single display panel 121, and the display panel 121 is disposed around a part of the outer circumference of the container 110. However, the arrangement of the display device 120 may not be limited to the above example.
Fig. 4 and fig. 5 are schematic perspective and top view diagrams of a 3D printing system according to an alternative embodiment of the present invention. In some alternative embodiments, the number of the display panels 121 is at least two, and at least two display panels 121 are sequentially spliced along the circumference of the container 110. In the present alternative embodiment, the display device 120 includes three display panels 121, and the three display panels 121 are sequentially spliced along the circumferential direction of the container 110. By adopting the arrangement mode of splicing at least two display panels 121, the luminous surface LS can surround the wider peripheral surface of the container 110 according to design requirements, so that the irradiation area of the peripheral surface of the container 110 at the same time is increased, and the 3D printing efficiency and the surface quality of a target printed object are further improved.
In some of the embodiments described above, the cross-section of the light emitting surface LS perpendicular to the first central axis CA1 is arranged around a part of the circumference of the container 110, i.e. the light emitting surface LS is arranged circumferentially around a part of the circumference of the container 110, for example 180 degrees circumferentially around the container 110. The angle of the light emitting surface LS around the circumference of the container 110 may be set according to practical design requirements, and may be any angle between 0 and 360 degrees.
With continued reference to fig. 1 and fig. 2, in some embodiments, a cross section of the light emitting surface LS perpendicular to the first central axis CA1 includes a first end E1 and a second end E2 opposite to each other, and a predetermined angle θ is formed between a connection line between the first end E1 and the first central axis CA1 and a connection line between the second end E2 and the first central axis CA1, and the predetermined angle θ may be greater than 0 and less than or equal to 360 degrees. In this embodiment, the preset included angle θ is 180 degrees, so that after the container 110 is rotated for 2 steps, the light emitting surface LS sequentially irradiates 360 degrees of the container 110 completely.
Fig. 6 and fig. 7 are schematic perspective and top view diagrams of a 3D printing system according to another alternative embodiment of the present invention. In the present embodiment, the display device 120 includes a single display panel 121, and the display panel 121 is disposed around a part of the outer circumference of the container 110. The section of the light emitting surface LS perpendicular to the first central axis CA1 includes a first end E1 and a second end E2 opposite to each other, a connecting line between the first end E1 and the first central axis CA1, and a connecting line between the second end E2 and the first central axis CA1 have a preset included angle θ, in this embodiment, the preset included angle θ is 60 degrees, so that after the container 110 is rotated by 6 steps, the light emitting surface LS sequentially irradiates 360 degrees of the container 110 completely.
Optionally, the positive integer multiple of the preset included angle θ is equal to 360 degrees, so that after the container 110 is rotated for an integer number of times, the light emitting surface LS sequentially and completely irradiates 360 degrees of the container 110, so as to facilitate the configuration of the rotation angle of the container 110 in each step rotation.
In some of the embodiments described above, the light emitting surface LS circumferentially surrounds a portion of the outer circumference of the container 110. However, the correspondence relationship between the light emitting surface LS and the outer periphery of the container 110 may not be limited thereto.
Fig. 8 and 9 are schematic perspective and top view diagrams of a 3D printing system according to another alternative embodiment of the present invention. In the present embodiment, a cross section of the light emitting surface LS perpendicular to the first central axis CA1 is provided around the entire periphery of the container 110, i.e., the light emitting surface LS circumferentially surrounds the entire periphery of the container 110. At this time, in the 3D printing process, when each slice is formed, the light emitting surface LS can irradiate the 360-degree periphery of the container 110 at the same time, and the rotation driving device 130 is not required to drive the container 110 to rotate when each slice is formed, so that the printing speed is faster, the formation of each slice does not need the splicing of illumination projection completely, the surface quality of each slice is higher, and the quality of the obtained target printed matter is more stable.
In some of the foregoing embodiments, the length of the light emitting surface LS along the first central axis CA1 is greater than or equal to the length of the container 110 along the first central axis CA1, so that the height of the light emitting surface LS along the first central axis CA1 can cover the depth of the material M1 to be cured in the container 110, and during each moment of illumination, the span of the light emitting surface LS on the first central axis CA1 is greater than or equal to the depth of the material M1 to be cured, so that the height of each slice along the first central axis CA1, that is, the height of the target print object at the position, thereby improving the printing efficiency.
Fig. 10 is a schematic perspective view of a 3D printing system according to still another alternative embodiment of the present disclosure. Unlike the foregoing embodiment, in the present embodiment, the length of the light emitting surface LS along the first central axis CA1 is smaller than the length of the container 110 along the first central axis CA1. The 3D printing system 100 may further include a lifting device 160. The lifting device 160 is connected to at least one of the container 110 and the curved light emitting device 120, and the lifting device 160 can drive one of the container 110 and the curved light emitting device 120 to move along the first central axis CA1 with respect to the other. For example, in the present embodiment, the lifting device 160 is mounted on the mounting surface 151 of the carrier 150, the curved light emitting device 120 is connected to the lifting device 160, and the lifting device 160 can drive the curved light emitting device 120 to move along the direction of the first central axis CA1, so that the curved light emitting device 120 lifts relative to the container 110. Alternatively, the lifting device 160 is electrically connected to the data processor 140, and the data processor 140 can transmit lifting control information to the lifting device 160 according to the slice information of the target printed matter. By arranging the lifting device 160, when the length of the light emitting surface LS along the first central axis CA1 is smaller than the length of the container 110 along the first central axis CA1, the entity printing of the whole height of the target printed matter along the first central axis CA1 can still be realized, the required area of the light emitting surface LS in the light emitting device 120 is saved, and the manufacturing cost of the 3D printing system is reduced to a certain extent.
It should be noted that, in the above embodiment, the lifting device 160 is connected to the curved light emitting device 120 as an example, however, in other alternative embodiments, the container 110 may be directly or indirectly connected to the lifting device 160, so that the lifting device 160 can drive the container 110 to move along the first central axis CA1 relative to the curved light emitting device 120. Alternatively, the lifting device 160 may also be connected to the rotational drive 130, for example the lifting device 160 is connected to the container 110 via the rotational drive 130 or the rotational drive 130 is connected to the container 110 via the lifting device 160. When the container 110 is directly or indirectly connected with the lifting device 160, the physical printing of the whole height of the target printed matter along the direction of the first central axis CA1 can still be realized when the length of the light emitting surface LS along the first central axis CA1 is smaller than the length of the container 110 along the first central axis CA1, and the required area of the light emitting surface LS in the light emitting device 120 is saved.
An embodiment of the present invention provides a 3D printing method for printing a target print object by the 3D printing system 100 according to any one of the embodiments of the present invention described above.
Fig. 11 is a flowchart of a 3D printing method according to an embodiment of the present invention, the 3D printing method including steps S110 to S160.
In step S110, a material M1 to be cured is added in the container 110. The material M1 to be cured is, for example, acrylate or other photosensitive synthetic resin. When the light emitted by the light emitting surface LS is ultraviolet light, the material M1 to be cured may be ultraviolet light sensitive resin, and when the light emitted by the light emitting surface LS is visible light, the material M1 to be cured may be visible light sensitive resin.
In step S120, a multi-layer virtual slice of the target print is acquired. The target print object has a second central axis parallel to the first central axis CA1 of the container 110, and the multiple virtual slices are sequentially nested from the second central axis to the outer peripheral side of the target print object, wherein the virtual slice overlapped with the second central axis is a columnar slice, and the virtual slice nested at the outer periphery of the columnar slice is a cylindrical slice.
In step S130, slice information of the corresponding virtual slice is obtained according to the expanded pattern of each layer of virtual slice.
In step S140, the light emission control information and the rotation control information corresponding to each layer of virtual slice are obtained according to the slice information corresponding to each layer of virtual slice.
In step S150, the curved surface light emitting device 120 is controlled to radiate light to the material M1 to be cured in the container 110 by the light emitting control information, and the rotation driving device 130 is controlled to drive the container 110 to rotate around the first central axis CA1 by the rotation control information, so that the material M1 to be cured is cured, and the physical slice corresponding to the virtual slice is obtained.
As described above, the multi-layered virtual slice includes a columnar slice overlapping the second center axis and a cylindrical slice nested on the outer periphery of the columnar slice. When the solid slice is formed, the solid slice correspondingly comprises a central slice overlapped with the first central axis CA1 and a peripheral slice nested on the periphery of the central slice, wherein the central slice corresponds to the columnar slice, and the peripheral slice corresponds to the cylindrical slice.
In forming a plurality of solid slices, a center slice is first formed. When the curved light-emitting device 120 irradiates light to the material M1 to be cured in the container 110, the center of the container, that is, the first central axis CA1 is the focusing position of the irradiated light, so that the energy at the first central axis CA1 preferentially reaches the curing threshold of the material M1 to be cured, and therefore, the material M1 to be cured at the first central axis CA1 is cured first to obtain a central slice. The central slice may serve as a curing core such that the peripheral slices formed later are cured layer by layer at the periphery of the central slice.
In some embodiments, to ensure that the central slice is formed at the first central axis CA1, other locations of the container may be assisted by localized inhibition curing techniques to avoid the central slice from forming elsewhere in the container. For example, at other positions of the container, curing of the curing material M1 is suppressed by means of oxygen suppression, light suppression, oil level suppression, or the like. Among them, oxygen inhibition forms a high concentration oxygen diffusion surface at the critical surface of curing, and the cured material M1 is not cured at the surface where oxygen is more. Specifically, for example, oxygen channels are arranged in a dispersed manner on the circumferential side wall of the container 110, oxygen can be introduced into the container through the oxygen channels, and when the central slice is formed, the oxygen diffusion concentration of the container 110 from the circumferential side wall to the direction of the first central axis CA1 is controlled, so that the oxygen concentration at the first central axis CA1 is lower, and the central slice can be ensured to be formed at the first central axis CA1. The central slice serves as a curing core, so that peripheral slices formed later are cured layer by layer at the periphery of the central slice. Light inhibition is to inhibit curing of the curing material M1 at other positions of the container by irradiation with light of shorter wavelength than the irradiation light. The oil level is suppressed, that is, the oil level layer is provided at other positions of the container so that the solidified material M1 in the vicinity of the oil level layer is not solidified.
In forming the physical cut sheet, a spatial rectangular coordinate system may be established at the printing system 100, wherein the z-axis is parallel to the first central axis CA1, and the x-axis and the y-axis are a pair of orthogonal directions in a plane perpendicular to the first central axis CA1.
The section of the light emitting surface LS perpendicular to the first central axis CA1 includes a first end E1 and a second end E2 opposite to each other, and a connection line between the first end E1 and the first central axis CA1 and a connection line between the second end E2 and the first central axis CA1 have a preset included angle θ, where the preset included angle θ may be greater than 0 and less than or equal to 360 degrees. The energy density function of the radiation rays upon curing in forming each solid slice is as follows:
in the above formula, INT is a rounding function. The angular speed of advancement of the omega rotating container, which is equal to the ratio of the angle of rotation to the curing time, wherein the angular speed omega varies with the curing time. I is a threshold exponential function representing the material M1 to be cured. Alpha is the absorption coefficient of the light emitting surface LS of the material M1 to be solidified for generating wave band light. Dc is a critical dose of light that determines the curing degree of the material M1 to be cured. r is the radius of the slice and,the radius r is indicated as a function of θ.
In the related art, a planar light source may be used as a light curing light source of the 3D printing system, for example, a planar projector is used as a light curing light source, and at any moment, the planar projector projects planar two-dimensional images into a container, so that in order to make the projection cover the entire circumferential surface of the container, a large number of two-dimensional images need to be sequentially arranged along the circumferential direction of the container, wherein the angle covered by each two-dimensional image needs to be obtained through projection transformation from the planar two-dimensional images to a circumferential curved surface of the container, therefore, when the planar light source is used for 3D printing, a variable of a "preset projection transformation angle", that is, an angle corresponding to each planar two-dimensional image after being projected onto the circumferential surface of the container, is needed in an energy density function of radiation rays of the planar light source, and the numerical value of the variable also relates to a drawing of the planar two-dimensional images, a distance between the planar light source and the container, and the like, so that calculation is complex, and the calculation process in 3D printing is more difficult and loaded. In this embodiment, the light source for providing the light curing is the curved light emitting device 120, and the angle of the light emitting surface LS around the circumference of the container 110, that is, the preset included angle θ, is a real angle around the circumference of the container 110, and the angle is obtained without projection transformation, so that the difficulty in the calculation process of 3D printing is reduced, the load of the related processor is reduced, and the printing process is convenient to be performed quickly. Meanwhile, the image provided by the luminous surface LS within the preset included angle theta does not need to be subjected to projection conversion between the plane image and the curved surface image, so that the distortion problem caused by errors in the projection conversion can be avoided, the printing quality of a target printed object in the circumferential direction is improved, and the possibility of edge defects is reduced.
In step S160, a plurality of layers of solid slices corresponding to the plurality of layers of virtual slices are sequentially formed from the first central axis CA1 toward the outer peripheral side of the container 110, thereby obtaining a target print product.
According to the 3D printing method of the embodiment of the present invention, the curved surface light emitting device 120 is used to provide the light emitting control information for the material M1 to be cured in the container 110, and the curved surface light emitting device 120 can simultaneously irradiate a wider peripheral surface of the container 110 relative to the planar projection device, so that the peripheral surface area of the container 110 receiving the light emitting control information at each moment is increased, the number of times of rotation of the container 110 in the printing process is reduced, and even when the light emitting surface LS of the curved surface light emitting device 120 is arranged around the whole periphery of the container 110, no rotation of the container 110 is required, thereby improving the efficiency of 3D printing. The curved surface light-emitting device 120 can irradiate the wider peripheral surface of the container 110 at the same time, so that the phenomenon of rough surface quality generated by projection and handover of a plurality of plane projections when a plane projection device is adopted is avoided, and the quality of 3D printing is improved. The angle of the light emitting surface LS around the circumference of the container 110 is not required to be obtained through projection transformation, so that the difficulty of the calculation process of 3D printing is reduced, the load of a related processor is reduced, and the printing process can be quickly carried out. The curved surface image provided by the luminous surface LS does not need to carry out projection conversion between the plane image and the curved surface image, so that the distortion problem caused by errors in projection conversion can be avoided, the printing quality of a target printed object in the circumferential direction is improved, and the possibility of edge defects is reduced.
The embodiment of the invention also provides another 3D printing system, and the material to be solidified is added into the container, and the material to be solidified is selectively layered and solidified to finally obtain the target printed matter.
Fig. 12 is a schematic perspective view of a 3D printing system according to another embodiment of the present invention, and fig. 13 is a schematic top view of the 3D printing system according to another embodiment of the present invention. The 3D printing system 200 includes a container 210, a curved light emitting device 220, and a data processor 240.
The container 210 is for containing the material M1 to be solidified, and the container 210 has a first central axis CA 1'. The curved light emitting device 220 includes a light emitting surface LS' having a curved surface, which is disposed around the entire periphery of the container 210. The data processor 240 is electrically connected to the curved surface light-emitting device 220, and the data processor 240 can provide light emission control information to the curved surface light-emitting device 220 according to the slice information of the target print.
According to the 3D printing system 200 of the embodiment of the present invention, the curved surface light emitting device 220 is used to provide the light emitting control information for the material M1 to be cured in the container 210, wherein the light emitting surface LS' is disposed around the entire periphery of the container 210, and no rotation is required for the container 210, so that the 3D printing system 200 does not include a rotation driving device any more, the efficiency of 3D printing is improved, and the cost of the 3D printing system 200 is saved. The luminous surface LS' is arranged around the whole periphery of the container 210, so that the phenomenon of rough surface quality generated by projection and cross connection of a plurality of plane projections when a plane projection device is adopted is avoided, and the quality of 3D printing is improved. The curved surface image provided by the luminous surface LS does not need to carry out projection conversion between the plane image and the curved surface image, so that the distortion problem caused by errors in projection conversion can be avoided, the printing quality of a target printed object in the circumferential direction is improved, and the possibility of edge defects is reduced.
The embodiment of the present invention also provides a 3D printing method for printing a target print object by the 3D printing system 200 according to any one of the embodiments of the present invention.
Fig. 14 is a flowchart of a 3D printing method according to another embodiment of the present invention, the 3D printing method including steps S210 to S260.
In step S210, a material M1 to be cured is added inside the container 210. The material M1 to be cured is, for example, acrylate or other photosensitive synthetic resin. When the light emitted from the light emitting surface LS 'is ultraviolet light, the material M1 to be cured may be ultraviolet light sensitive resin, and when the light emitted from the light emitting surface LS' is visible light, the material M1 to be cured may be visible light sensitive resin.
In step S220, a multi-layered virtual slice of the target print object is acquired, wherein the target print object has a second central axis parallel to the first central axis CA 1' of the container 210, and the multi-layered virtual slices are sequentially nested from the second central axis to the outer peripheral side of the target print object, wherein the virtual slice coincident with the second central axis is a columnar slice, and the virtual slice nested at the outer periphery of the columnar slice is a cylindrical slice.
In step S230, slice information of the corresponding virtual slice is obtained according to the expanded pattern of each layer of virtual slice.
In step S240, light emission control information corresponding to each layer of virtual slice is obtained according to slice information corresponding to each layer of virtual slice.
In step S250, the curved surface light emitting device 220 is controlled to radiate light to the material M1 to be cured in the container 210 by the light emitting control information, so that the material M1 to be cured is cured to obtain a physical slice corresponding to the virtual slice.
In step S260, a plurality of layers of solid slices corresponding to the plurality of layers of virtual slices are sequentially formed from the first central axis CA 1' toward the outer peripheral side of the container 210, thereby obtaining a target print product.
According to the 3D printing method of the embodiment of the invention, in the forming process of each slice, the luminous surface LS' irradiates light to the whole periphery of the container 210 at the same time, and the container 210 does not need to be rotated in the printing process, so that the 3D printing efficiency is improved, the projection delivery during the forming of each slice is avoided, and the quality of 3D printing is improved. The light emitting surface LS surrounds the entire periphery of the container 110, reducing the difficulty of the calculation process of 3D printing, thereby reducing the load of the associated processor and facilitating the rapid progress of the printing process. The curved surface image provided by the luminous surface LS does not need to carry out projection conversion between the plane image and the curved surface image, so that the distortion problem caused by errors in projection conversion can be avoided, the printing quality of a target printed object in the circumferential direction is improved, and the possibility of edge defects is reduced.
These embodiments are not exhaustive or to limit the invention to the precise embodiments disclosed, and according to the invention described above. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims (10)

1. A 3D printing system, comprising:
a container for containing a material to be solidified, the container having a first central axis;
the curved surface light-emitting device comprises a light-emitting surface with a curved surface, and the light-emitting surface is arranged around at least part of the periphery of the container;
the rotation driving device is connected with the container and used for driving the container to rotate by taking the first central shaft as an axis; and
the data processor is electrically connected with the curved surface light-emitting device and the rotation driving device, and can provide light-emitting control information for the curved surface light-emitting device and send rotation control information to the rotation driving device according to the slice information of the target printed matter;
the curved surface light-emitting device comprises a flexible display panel, wherein the display panel comprises a plurality of light-emitting elements which are arrayed on the light-emitting surface;
the number of the display panels is at least two, and the at least two display panels are spliced in sequence along the circumferential direction of the container.
2. The 3D printing system of claim 1, wherein the light emitting surface is coaxially disposed with the container, and each point of the light emitting surface is equidistant from the container outer wall.
3. The 3D printing system of claim 1, wherein a cross-section of the light emitting face perpendicular to the first central axis is disposed around an entire periphery of the container.
4. The 3D printing system of claim 1, wherein a cross-section of the light emitting face perpendicular to the first central axis is disposed around a portion of the periphery of the container.
5. The 3D printing system of claim 4, wherein a cross section of the light emitting surface perpendicular to the first central axis includes a first end and a second end opposite to each other, a line from the first end to the first central axis and a line from the second end to the first central axis have a preset included angle, and a positive integer multiple of the preset included angle is equal to 360 degrees.
6. The 3D printing system of claim 1, wherein a length of the light emitting surface along the first central axis is greater than or equal to a length of the container along the first central axis.
7. The 3D printing system of claim 1, wherein a length of the light emitting face along the first central axis is less than a length of the container along the first central axis, the 3D printing system further comprising:
and the lifting device is connected with at least one of the container and the curved surface light-emitting device, and can drive one of the container and the curved surface light-emitting device to move along the first central axis direction relative to the other.
8. The 3D printing system of claim 1, wherein the light emitting element is an ultraviolet light emitting element; or alternatively
The light emitting element is a visible light emitting element.
9. The 3D printing system of claim 1, wherein the light emitting element comprises a sub-millimeter light emitting diode, a micro light emitting diode, a sub-millimeter organic light emitting diode, or a micro light emitting diode.
10. A 3D printing method, characterized by printing a target print object by the 3D printing system according to any one of claims 1 to 9, the 3D printing method comprising:
the material to be solidified is added into the container,
obtaining a multi-layer virtual slice of the target printed matter, wherein the target printed matter has a second central axis parallel to a first central axis of the container, the multi-layer virtual slices are sequentially nested from the second central axis to the outer peripheral side of the target printed matter, the virtual slice overlapped with the second central axis is a columnar slice, and the virtual slice nested at the outer periphery of the columnar slice is a columnar slice;
obtaining slice information of the corresponding virtual slice according to the unfolding pattern of each layer of virtual slice;
acquiring luminous control information and rotation control information corresponding to each layer of virtual slice according to slice information corresponding to each layer of virtual slice;
the curved surface light-emitting device is controlled to radiate light to the material to be solidified in the container through the light-emitting control information, and the rotation driving device is controlled to drive the container to rotate by taking the first central shaft as an axis through the rotation control information, so that the material to be solidified is solidified, and a physical slice corresponding to the virtual slice is obtained;
and sequentially forming a plurality of layers of physical slices corresponding to the virtual slices from the first center axis to the outer peripheral side of the container to obtain the target printed matter.
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CN104401002A (en) * 2014-05-31 2015-03-11 福州大学 3D printing-based curved microlens array manufacturing method
EP3253545B1 (en) * 2015-02-02 2023-07-19 Massivit 3D Printing Technologies Ltd. A curing system for printing of 3d objects
CN104959602B (en) * 2015-07-11 2017-12-29 新疆熠金能源科技有限公司 Utilize the dot matrix 3D printing light source of light emitting diode
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EP3676095B1 (en) * 2017-08-30 2023-11-08 Ecole Polytechnique Fédérale de Lausanne (EPFL) Methods and apparatus for three-dimensional fabrication by tomographic back projections
CN108189387A (en) * 2017-12-28 2018-06-22 西安交通大学 Realize the 3D piecemeals Method of printing of printing speed and 3D piecemeal print systems
CN110228193B (en) * 2019-06-04 2021-10-15 浙江大学 Integrated colored light 3D biological printing system based on imaging principle
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