WO2021174942A1 - 一种三维打印设备及三维打印方法 - Google Patents
一种三维打印设备及三维打印方法 Download PDFInfo
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- WO2021174942A1 WO2021174942A1 PCT/CN2020/135257 CN2020135257W WO2021174942A1 WO 2021174942 A1 WO2021174942 A1 WO 2021174942A1 CN 2020135257 W CN2020135257 W CN 2020135257W WO 2021174942 A1 WO2021174942 A1 WO 2021174942A1
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- WIPO (PCT)
- Prior art keywords
- light blocking
- platform
- curing lamp
- blocking portion
- target model
- Prior art date
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- 238000010146 3D printing Methods 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000000903 blocking effect Effects 0.000 claims abstract description 384
- 238000007639 printing Methods 0.000 claims abstract description 170
- 239000000463 material Substances 0.000 claims abstract description 113
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- 230000011218 segmentation Effects 0.000 claims description 2
- 238000001723 curing Methods 0.000 description 276
- 238000000465 moulding Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 6
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- 229920000747 poly(lactic acid) Polymers 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
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- 229910021389 graphene Inorganic materials 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
-
- 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
- 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
Definitions
- This application relates to the field of three-dimensional printing technology, and in particular to a three-dimensional printing device and a three-dimensional printing method.
- Three-dimensional printing technology is a process of rapid prototyping, which uses layer-by-layer stacking to create a three-dimensional model.
- the existing rotary three-dimensional inkjet printer includes: a rotatable platform, a print head that moves along the radial direction of the platform, and a curing lamp fixedly arranged along the radial direction of the platform.
- the print head and the curing lamp are synchronized with respect to the platform in the vertical height direction. Lift. Since the distance between the print head and the curing lamp will change as the print head moves in the radial direction of the platform, there is a case where the distance between the print head and the curing lamp is small, and the light emitted by the curing lamp is easily reflected by the platform.
- the material in the nozzle holes of the print head will be solidified and the nozzle holes will be blocked, which affects the ink output; on the other hand, the materials attached to the print head surface will be solidified, which will cause difficulty in cleaning the print head and the service life of the print head. It will also be shortened.
- the curing light reflected on the print head will also increase, that is, within a certain range, it will increase with the height of the target model. Increase, the greater the amount of curing light reflected to the surface of the print head, the more likely it is to affect the print head, thereby affecting printing accuracy and print quality.
- the present application provides a three-dimensional printing device and a three-dimensional printing method, so as to prevent the light emitted by the curing lamp from being reflected to the print head, and reduce the risk of curing the printing material in the nozzle hole or the attached surface of the print head.
- the first aspect of the application provides a three-dimensional printing device, the three-dimensional printing device includes:
- a print head the print head is used to eject printing materials onto the platform;
- a curing lamp which is used for irradiating to cure at least part of the printing material, and at least part of the printing material forms a target model
- the print head and the curing lamp are located above the platform;
- the light blocking part is used to block the light emitted by the curing lamp from being reflected on the print head.
- the light blocking part is arranged between the curing lamp and the print head.
- the upper end surface of the light blocking portion is not lower than the bottom surface of the curing lamp.
- the three-dimensional printing device further includes a beam, and the curing lamp and the print head are arranged on the beam;
- the beam and the platform can move relative to each other in the vertical height direction (Z) to change the distance between them, and during the relative movement of the two, keep the upper end surface of the light blocking part not lower than the The bottom surface of the curing lamp.
- the three-dimensional printing device further includes a connecting component, and the light blocking portion is connected to the connecting component;
- the light blocking portion can move in the vertical height direction (Z), and the blocking part can move in the vertical height direction (Z).
- the platform and/or the beam can be passed through to keep the upper end surface of the light blocking part not lower than the bottom surface of the curing lamp. There is a gap on the upper end surface so that the light blocking part does not contact the platform; or the platform is provided with a through hole, at least part of the light blocking part can extend into the through hole, and the blocking part The light part has no contact with the platform.
- the light blocking portion is connected to the beam, and the light blocking portion can be extended and contracted. During the expansion and contraction process, a gap is maintained between the bottom surface of the light blocking portion and the upper end surface of the platform, so that the The light blocking part has no contact with the platform; or,
- the light blocking portion is connected to the beam, the platform is provided with a through hole, the light blocking portion can be extended and contracted, and during the expansion and contraction process, at least part of the light blocking portion can extend into the through hole, and The light blocking part has no contact with the platform.
- the light blocking portion is connected to the platform, and the light blocking portion can be extended and contracted to keep the upper end surface of the light blocking portion not lower than the bottom surface of the curing lamp.
- the three-dimensional printing device further includes a support frame, and in the vertical height direction (Z), the support frame is located below the platform;
- the platform is provided with a through hole, the light blocking portion passes through the through hole and is connected to the support frame, and the light blocking portion has no contact with the platform;
- the light blocking portion can be extended and contracted to keep the upper end surface of the light blocking portion not lower than the bottom surface of the curing lamp.
- the upper end surface of the light blocking portion is lower than the bottom surface of the curing lamp.
- the upper end surface of the light blocking portion is not lower than the upper end surface of the target model.
- the three-dimensional printing device further includes a beam, and the curing lamp and the print head are arranged on the beam;
- the beam and the platform can move relative to each other in the vertical height direction (Z) to change the distance between them, and during the relative movement of the two, keep the upper end surface of the light blocking part lower than the The bottom surface of the curing lamp, and the upper end surface of the light blocking part is not lower than the upper end surface of the target model.
- the light blocking part is provided on the platform
- the light blocking part can be stretched and contracted to block the emitted light and reflected light of the curing lamp from being irradiated to the print head.
- the three-dimensional printing device further includes a connecting component, and the light blocking portion is connected to the connecting component;
- the light blocking portion can move in the vertical height direction (Z), and the blocking part can move in the vertical height direction (Z). During the movement of the light part, it can pass through the platform.
- the three-dimensional printing device further includes a support frame, and the support frame is located below the platform;
- the platform is provided with a through hole, the light blocking portion passes through the through hole and is connected to the support frame, and the light blocking portion has no contact with the platform;
- the light blocking part can be stretched to prevent the emitted light and reflected light of the curing lamp from irradiating the print head.
- the platform can rotate around a rotation axis, and there is a preset distance R between the curing lamp and the rotation axis of the platform, and during the rotation of the platform, the preset distance R forms a non-printing area ;
- the light blocking portion is arranged on the inner side of the non-printing area, and the target model is printed on the outer side of the non-printing area.
- the light blocking is longer than the curing lamp.
- the target model rotates to enter the coverage area of the curing lamp, turn on the segmentation of the curing lamp corresponding to the area where the target model is located, and when the target model rotates to leave the coverage area of the curing lamp , Turn off the curing lamp.
- the light blocking portion is formed by ejecting printing materials from the print head onto the platform.
- the platform rotates around its own rotation axis, so that the target model and the light blocking portion rotate with the platform.
- the preset distance R is a preset distance between the curing lamp and the rotation axis of the platform, and during the rotation of the platform, the preset distance R forms a non-printing area;
- the light blocking portion and the target model are printed on the outside of the non-printing area, and the light blocking portion is close to the non-printing area relative to the target model.
- the light blocking portion is printed at a first position, and in the first position, along the radial direction of the platform, the light blocking portion is close to the outer edge of the non-printing area; or,
- the light blocking portion is printed at a second position, and in the second position, along the radial direction of the platform, the light blocking portion is away from the outer edge of the non-printing area.
- the central angle corresponding to the light blocking portion is equal to 360 degrees.
- the central angle corresponding to the light blocking portion is less than or equal to 360 degrees, wherein the printing material forming the light blocking portion is a non-photocurable material.
- the central angle corresponding to the light blocking portion corresponding to the width W of the curing lamp is a first angle ⁇ ;
- the curing lamp When the target model rotates to enter the coverage area of the curing lamp, the curing lamp is turned on so that the curing lamp illuminates the target model, and when the target model rotates to leave the coverage area of the curing lamp, Turn off the curing lamp, and the target model rotates a second angle ⁇ from entering to leaving the coverage of the curing lamp;
- the center angle corresponding to the printed light blocking portion is the third angle ⁇ .
- ⁇ + ⁇ is less than 360 degrees
- the curing lamp when the target model rotates to enter the coverage of the curing lamp, the curing lamp is turned on, and when the target model rotates to leave the coverage of the curing lamp, the curing lamp is turned off,
- the light blocking part and the target model are printed on different sides of the rotation axis; or,
- the light blocking part and the target model are printed on the same side of the rotation axis.
- the height of the light blocking portion is less than or equal to the height of the target model.
- the second aspect of the present application provides a three-dimensional printing method, which is applied to the three-dimensional printing device provided in the first aspect of the present application, wherein the three-dimensional printing method includes:
- the printing head is controlled to eject printing materials onto the platform to at least form a target model.
- the three-dimensional printing device and the three-dimensional printing method are provided with a light blocking part, which can block the light emitted by the curing lamp from being reflected to the print head by the platform, thereby reducing to a certain extent the nozzle hole of the print head is blocked or the surface of the print head is blocked. There is a risk that the attached material will be cured and difficult to clean, thereby improving the service life and printing quality of the print head.
- Figure 1 is a schematic top view of an existing printing device and a target model
- Figure 2 is a schematic front view of an existing printing device and target model (1)
- Figure 3 is a schematic front view of an existing printing device and target model (2);
- FIG. 4 is a schematic top view of the three-dimensional printing device and the target model provided in the first, second, third, and fifth embodiments of the application in a specific embodiment;
- FIG. 5 is a schematic top view of the three-dimensional printing device and the target model provided in Embodiments 1, 2, 3, and 5 of this application in another specific embodiment;
- FIG. 6 is a schematic front view of the three-dimensional printing device and the target model provided in the first embodiment of the application;
- FIG. 7 is a schematic front view of the three-dimensional printing device and the target model provided in the second embodiment of the application in a specific embodiment
- FIG. 8 is a schematic front view of the three-dimensional printing device and the target model provided in the second embodiment of the application in another specific embodiment
- FIG. 9 is a schematic front view of the three-dimensional printing device and the target model provided in the third embodiment of the application in a specific embodiment
- FIG. 10 is a schematic front view of the three-dimensional printing device and the target model provided in the third embodiment of the application in another specific embodiment;
- FIG. 11 is a schematic front view of the three-dimensional printing device and the target model provided in the fourth embodiment of the application;
- FIG. 12 is a schematic front view of the three-dimensional printing device and the target model provided in the fifth embodiment of the application;
- FIG. 13 is a schematic top view of a three-dimensional printing device and a target model provided by this application in a specific embodiment
- FIG. 14 is a schematic top view of the three-dimensional printing device and the target model provided in the fourth, sixth, seventh, and eighth embodiments of the application in a specific embodiment;
- FIG. 15 is a schematic top view of the three-dimensional printing device and the target model provided in Embodiments 6 to 8 of this application in another specific embodiment;
- 16 is a schematic front view of the three-dimensional printing device and the target model provided in the sixth embodiment of the application;
- FIG. 17 is a schematic front view of the three-dimensional printing device and the target model provided in the seventh embodiment of the application.
- FIG. 18 is a schematic front view of the three-dimensional printing device and the target model provided in the eighth embodiment of the application;
- 19 is a schematic top view of the printing device and the target model provided in the ninth embodiment of the application.
- 20 is a schematic front view of the printing device and the target model provided in the ninth embodiment of the present application.
- 21 is a schematic top view of the printing device and the target model provided in the tenth embodiment of the present application.
- Figure 22 is a schematic front view of the printing device and the target model provided in the tenth embodiment of the present application
- FIG. 23 is a schematic top view of the printing device and the target model provided in the eleventh embodiment of the present application.
- 24 is a schematic front view of the printing device and the target model provided in the eleventh embodiment of the present application.
- 25 is a schematic top view of the printing device and the target model when the target model just enters the coverage area of the curing lamp during the three-dimensional printing process provided in the twelfth embodiment of the present application;
- 26 is a schematic top view of the printing device and the target model when the target model completely leaves the coverage area of the curing lamp during the three-dimensional printing process provided in the twelfth embodiment of the present application;
- FIG. 27 is a schematic front view of the printing device and the target model provided in the twelfth embodiment of the present application.
- 29 is a schematic top view of the printing device and the target model when the target model completely leaves the coverage area of the curing lamp during the three-dimensional printing process provided in the thirteenth embodiment of the present application;
- FIG. 30 is a schematic front view of the printing device and the target model provided in the thirteenth embodiment of the present application.
- the shaded area in the curing lamp 14 represents the open area of the curing lamp 14.
- the coordinate system X is the width direction of the three-dimensional printing device 1
- Y is the length direction of the three-dimensional printing device 1
- Z It is the height direction of the three-dimensional printing device 1.
- the 3D printing device 1 is the latest rapid prototyping device using light curing and lamination technologies.
- the working principle is basically the same as that of ordinary 3D printing.
- the printing control data is used to realize layer-by-layer printing, and the thin layers are stacked to finally form the target object.
- the existing three-dimensional printing device 1 includes a platform 11, a print head 12, and a curing lamp 14.
- the print head 12 and the curing lamp 14 are raised and lowered synchronously relative to the platform 11 in the vertical height direction Z.
- the distance between the print head 12 and the curing lamp 14 will change with the reciprocating movement of the print head 12 in the radial direction A.
- the curing lamp 14 when the distance between the print head 12 and the curing lamp 14 is small, the curing lamp 14 emits The light will be reflected by the platform 11 to the print head 12 (the light path diagram is shown in Figure 2 and Figure 3). On the one hand, it will cause the material in the nozzle holes of the print head 12 to solidify and cause the nozzle holes to be blocked, which affects the ink output. This will cause the material attached to the surface of the print head 12 to solidify, making it difficult to clean the print head 12, and the service life of the print head 12 will be shortened.
- the distance between the print head 12 and the curing lamp 14 and the platform 11 increases relatively, and the amount of curing light reflected to the print head 12 within a certain range will also increase.
- the impact on the print head 12 will also increase, causing the printing accuracy of the target model 13 to decrease as the height increases, thereby affecting the printing quality of the printing device.
- an embodiment of the present application provides a three-dimensional printing device 1.
- the three-dimensional printing device 1 includes a platform 11, a print head 12, a curing lamp 14 and a light blocking portion 15; ,
- the platform 11 can rotate around the axis of rotation 112, the print head 12 can reciprocate along the radial direction A of the platform 11 for ejecting printing materials onto the platform 11, and the curing lamp 14 is fixedly arranged along the radial direction A of the platform 11 for irradiation
- at least part of the printing material is laminated to form the target model 13, wherein in the vertical height direction Z, the print head 12 and the curing lamp 14 are located above the platform 11, and the target model 13 is the print head 12 in the Under pressure, the printing material is ejected from the nozzle to the designated position at a certain speed, and at least part of the printing material is cured by curing light irradiation.
- the light blocking part 15 is used to block the curing lamp 14 from emitting The light reflected on the print head 12 reduces the risk of curing of the printing material in the nozzle holes of the print head 12 or attached to the surface.
- the shapes of the platform 11, the print head 12, and the curing lamp 14 in the three-dimensional printing device 1 are not limited to those shown in FIGS. 1 to 15, and the three-dimensional printing device 1 provided in this application is not limited to including a rotatable platform.
- the print head 12 and curing lamp 14 may also include common structures such as leveling rollers, XYZ axis transmission mechanism, and chassis, which are all suitable for this application.
- the present application does not limit the shape of the light-blocking portion 15. It can be a cylinder, a circular cylinder, a prism or other shape entities, as long as it can achieve the light-blocking effect and will not interact with the print head 12. , Curing lamp 14 or other components interfere.
- the light blocking portion 15 is arranged between the curing lamp 14 and the print head 12, and part of the light (including emitted light and/or reflected light) emitted by the curing lamp 14 is irradiated To the light blocking part 15, so that part of the light emitted by the curing lamp 14 is blocked by the light blocking part 15 and reflected to the print head 12 by the platform 11, which reduces to a certain extent the nozzle hole of the print head 12 is blocked, or the surface of the print head 12 is attached There is a risk that the material will be cured and difficult to clean, thereby increasing the service life and printing accuracy of the print head 12.
- the printing data controls the print head 12 to move back and forth along the radial direction A of the platform 11, and eject the printing material onto the platform 11.
- the printing material is a light-curable material, and when the light-curable material moves
- the curing lamp 14 reaches the area covered by the curing lamp 14, the curing lamp 14 emits light to cure the photocuring material to form the target model 13.
- the photocurable material is a material that is cured after being irradiated by curing light, such as photosensitive resin, PLA material (polylactic acid is also called polylactide) and other materials.
- the print head 12 When the print head 12 reciprocates along the radial direction A of the platform 11, it needs buffer space when accelerating and decelerating, so that the length of the curing lamp 14 does not exceed the rotation axis 112 of the platform 11, and there is a certain preset distance R between the two.
- the distance R is the buffer space of the print head 12 to reduce the risk of collision with the curing lamp 14 during the movement of the print head 12.
- the preset distance R forms a circular non-printing area 113, because the non-printing area 113 It is the buffer space of the print head 12.
- the print head 12 moves to the inner side of the non-printing area 113, it stops ejecting printing materials, so that the target model 13 is printed on the outer side of the non-printing area 113, and the light blocking part 15 is provided in the non-printing area 113.
- the radius of the non-printing area 113 may be equal to the radius of the platform 11 minus the length of the curing lamp 14.
- the light blocking portion 15 can also be arranged outside of the non-printing area 113, which can block the light emitted by the curing lamp 14 from being reflected on the print head 12, and does not collide with the moving print head 12, and does not occupy the molding of the target model 13. Location is fine.
- the light blocking portion 15 is longer than the curing lamp 14, and the light blocking portion 15 is provided Between the curing lamp 14 and the print head 12, the curing lamp 14 is separated from the print head 12 so that the light blocking portion 15 can sufficiently block the light emitted by the curing lamp 14 from being reflected on the print head 12.
- the material of the light blocking portion 15 has a light absorption effect and has a high light absorption rate, or the surface of the light blocking portion 15 is provided with a coating, and the coating material on the surface of the light blocking portion 15 has a light absorption effect.
- the light absorption rate is relatively high, so as to reduce the risk that the light emitted by the curing lamp 14 will be reflected by the light blocking portion 15 multiple times.
- the coating material may be black light-absorbing materials such as graphene and transition metal sulfide (TMDC).
- TMDC transition metal sulfide
- the curing lamp 14 when the target model 13 is rotated to enter the coverage area of the curing lamp 14, the curing lamp 14 is turned on corresponding to the segment of the area where the target model 13 is located, and the target model 13 is rotated to When leaving the area covered by the curing lamp 14, the curing lamp 14 is turned off.
- the curing lamp 14 implements segmented control, and the curing lamp 14 only needs to turn on the segment corresponding to the target model 13, which not only reduces the coverage of the curing lamp 14 but also increases the radiation emitted by the curing lamp 14
- the distance between the light and the print head 12 reduces the probability of the material on the print head 12 being cured, and saves curing light resources.
- the curing light 14 can also be turned on all the time; or, the curing light 14 can also be turned on when the target model 13 enters the coverage area of the curing light 14, and the curing light 14 is turned off when the target model 13 leaves the coverage area of the curing light 14.
- the upper end surface of the light blocking portion 15 is not lower than the bottom surface of the curing lamp 14 to prevent the light emitted from the curing lamp 14 from irradiating the print head 12.
- the upper end surface of the light blocking portion 15 is kept not lower than the bottom surface of the curing lamp 14, so that the light blocking portion 15 is in the vertical height direction. Z can completely block the light emitted by curing from being reflected on the print head 12.
- the three-dimensional printing device 1 further includes a beam 16, the curing lamp 14 and the print head 12 are arranged on the beam 16; the beam 16 and the platform 11 can be along the vertical height direction Z
- the relative movement is used to change the distance between the two, and during the relative movement of the two, the upper end surface of the light blocking portion 15 is kept not lower than the bottom surface of the curing lamp 14.
- the distance between the beam 16 and the platform 11 gradually increases, and the beam 16 is controlled to drive the curing lamp 14 and the print head 12 to move upward, or control
- the platform 11 moves downwards so that the print head 12 and curing lamp 14 can maintain the same distance from each forming layer of the target model 13, so as to ensure the printing quality of the target model 13, and the moving process of the beam 16 or/and the platform 11
- the upper end surface of the light blocking portion 15 is kept not lower than the bottom surface of the curing lamp 14 so that the light blocking portion 15 can completely block the light emitted by curing from being reflected on the print head 12 in the vertical height direction.
- the print head 12 and the curing lamp 14 are not limited to being arranged on the same beam 16 as shown in FIGS. 4 to 12 and 14 to 18, and the curing lamp 14 may not be lifted and lowered synchronously with the print head 12.
- the print head 12 and The curing lamp 14 can also be arranged on the two beams 16 respectively, and the two beams 16 are collinear or non-collinear, both of which are applicable to this embodiment.
- the light blocking portion 15 is provided between the curing lamp 14 and the print head 12 in the width direction X of the curing lamp 14.
- the print head 12 and the curing lamp 14 when the print head 12 and the curing lamp 14 are respectively arranged on two non-collinear beams 16, the print head 12 and the curing lamp 14 can be raised and lowered synchronously, and the curing lamp 14 can also be positioned higher than the platform 11. The position has no effect on the irradiation of the target model 13 during the molding process.
- the beam 16 is controlled to drive the print head 12 to move upwards, or the printing platform 11 is controlled to move downwards, so that the print head 12 can remain the same as each forming layer of the target model 13
- the three-dimensional printing device 1 further includes a connecting component, and the light blocking portion 15 is connected to the connecting component; the process of the relative movement of the beam 16 and the platform 11 in the vertical height direction Z Driven by the connecting assembly, the light blocking portion 15 can move in the vertical height direction Z, and during the movement of the light blocking portion 15, it can pass through the platform 11 and/or the beam 16 to maintain the light blocking portion 15
- the upper end surface is not lower than the bottom surface of the curing lamp 14, and there is a gap between the bottom surface of the light blocking portion 15 and the upper end surface of the platform 11, so that the light blocking portion 15 does not contact the platform 11; or, at least part of the light blocking portion 15 can extend Into the through hole 111, and the light blocking portion 15 has no contact with the platform 11.
- the distance between the beam 16 and the platform 11 gradually increases, and the light blocking portion 15 has a sufficient length so that the connecting assembly controls the light blocking portion 15 along the vertical height direction During the Z movement, the light emitted by the curing lamp 14 can be completely blocked from being reflected on the print head 12, and the light blocking portion 15 is not retractable.
- the light blocking portion 15 needs to pass through the platform 11 and/or the beam 16 to Keep the upper end surface of the light blocking portion 15 not lower than the bottom surface of the curing lamp 14, and maintain a gap between the bottom surface of the light blocking portion 15 and the upper end surface of the platform 11, so that the light blocking portion 15 does not contact the platform 11; or, blocking light At least part of the portion 15 can extend into the through hole 111, and the light blocking portion 15 has no contact with the platform 11, so as to avoid friction with the light blocking portion 15 when the platform 11 rotates.
- the light blocking portion 15 is an arc-shaped column or prism, and the light blocking portion 15 passes through the platform 11 and does not contact the platform 11. Under the driving of the connecting assembly, the light blocking portion 15 It can move relative to the platform 11 as the print head 12 moves up and down in the vertical height direction Z relative to the printing platform 11, and keep the upper end surface of the light blocking portion 15 not lower than the bottom surface of the curing lamp 14 to block the curing lamp more.
- the light emitted by 14 is reflected to the printing head 12, wherein the light blocking portion 15 is close to the curing lamp 14 so as not to occupy the buffer area of the printing head 12 as much as possible, and to avoid collision with the printing head 12 as much as possible.
- the light blocking portion 15 is an arc-shaped column or prism, the upper end of the light blocking portion 15 passes through the beam 16, and the lower end is a certain distance from the platform 11.
- the distance d is to avoid friction in contact with the platform 11, where the range of d is greater than 5mm and less than 10mm.
- This embodiment does not specifically limit this, as long as the lower end surface of the light blocking portion 15 does not contact the platform 11 and can block it as much as possible. There may be multiple rays, all of which are applicable to this embodiment.
- the light blocking portion 15 can move relative to the platform 11 as the print head 12 rises and lowers relative to the printing platform 11 in the vertical height direction Z, and keeps the upper end surface of the light blocking portion 15 not lower than the curing lamp 14 on the bottom surface, and the distance d between the lower end surface of the light blocking portion 15 and the platform 11 remains unchanged, so as to more block the light emitted by the curing lamp 14 from being reflected to the print head 12, wherein the light blocking portion 15 is close to the curing lamp 14 , So as not to occupy the buffer area of the print head 12 as much as possible, and to avoid collision with the print head 12 as much as possible.
- the light blocking portion 15 is an arc-shaped column or prism, the upper end of the light blocking portion 15 passes through the beam 16, and the lower end passes through the platform 11. And do not contact with the platform 11, so as to avoid friction with the platform 11, driven by the connecting assembly, the light blocking portion 15 can move relative to the platform 11 as the print head 12 rises and falls in the vertical height direction Z relative to the platform 11, And keep the upper end surface of the light blocking portion 15 not lower than the bottom surface of the curing lamp 14, wherein the light blocking portion 15 is close to the curing lamp 14 so as not to occupy the buffer area of the printing head 12 as much as possible, and to avoid collision with the printing head 12 as much as possible.
- the light blocking portion 15 is connected to the beam 16, and the light blocking portion 15 can expand and contract, and during the expansion and contraction process, the bottom surface of the light blocking portion 15 A gap is maintained with the upper end surface of the platform 11 so that the light blocking portion 15 does not contact the platform 11; or, the light blocking portion 15 is connected to the beam 16, and the platform 11 is provided with a through hole 111, and the light blocking portion 15 can be extended and contracted. In the process, at least part of the light blocking portion 15 can extend into the through hole 111, and the light blocking portion 15 has no contact with the platform 11.
- the light blocking portion 15 is fixed on the beam 16 to keep the upper end surface of the light blocking portion 15 not lower than the bottom surface of the curing lamp 14.
- the molding layer of the target model 13 printed by the print head 12 is superimposed layer by layer, and the beam 16 is relative to the platform 11
- the distance gradually increases, the light blocking portion 15 can expand and contract in the vertical height direction Z, and the bottom surface of the light blocking portion 15 and the upper end surface of the platform 11 maintain a gap or at least part of the light blocking portion 15 extends into the through hole 111 of the platform 11 Inside, the light blocking portion 15 is not in contact with the platform 11 to avoid friction with the platform 11.
- the light blocking part 15 can be stretched and retracted by using components such as bellows, or the light blocking part 15 can be stretched and retracted by a drive device such as a screw, an air cylinder, an electric cylinder, etc.
- a drive device such as a screw, an air cylinder, an electric cylinder, etc. The application does not limit the stretching of the light blocking part 15 Way.
- the light blocking portion 15 is an arc-shaped column or prism, and the upper end of the light blocking portion 15 is fixed on the beam 16 to maintain the light blocking portion
- the upper end surface of 15 is not lower than the bottom surface of the curing lamp 14, and the lower end surface of the light-blocking portion 15 is at a certain distance d from the platform 11 to avoid contact with the platform 11 and friction.
- the range of d is greater than 5mm and less than 10mm. The example does not specifically limit this, as long as the lower end surface of the light blocking portion 15 is not in contact with the platform 11 and can block as much light as possible, it is applicable to this embodiment.
- the light blocking portion 15 can expand and contract as the beam 16 is raised and lowered in the vertical height direction Z relative to the platform 11, and the distance d between the lower end surface of the light blocking portion 15 and the platform 11 remains unchanged, so as to more block the light emitted by the curing lamp 14
- the light is reflected to the print head 12, and the light blocking portion 15 is close to the curing lamp 14, so as not to occupy the buffer area of the print head 12 as much as possible, and to avoid collision with the print head 12 as much as possible.
- the light blocking portion 15 is an arc-shaped column or prism, the upper end of the light blocking portion 15 is fixed on the beam 16, and the light blocking portion 15 At least part of it extends into the through hole 111 of the platform 11, and does not contact the platform 11, so as to avoid friction with the platform 11, the light blocking part 15 can expand and contract with the beam 16 relative to the platform 11 in the vertical height direction Z.
- the light blocking portion 15 is close to the curing lamp 14, so as not to occupy the buffer area of the print head 12 as much as possible, and to avoid collision with the print head 12 as much as possible.
- the light blocking portion 15 is connected to the platform 11, and the light blocking portion 15 can be extended and contracted to keep the upper end surface of the light blocking portion 15 not lower than the bottom surface of the curing lamp 14. .
- the light blocking part 15 is fixed on the platform 11, and the forming layers of the target model 13 are superimposed layer by layer as the print head 12 prints.
- the distance between the beam 16 and the platform 11 gradually increases, and the light blocking part 15 can expand and contract in the vertical height direction Z , And keep the upper end surface of the light blocking portion 15 not lower than the bottom surface of the curing lamp 14 to prevent the light emitted by the curing lamp 14 from being reflected to the print head 12.
- the light blocking portion 15 is a hollow cylinder, and the light blocking portion 15 is fixed on the platform 11 and rotates as the platform 11 rotates. As the platform 11 rotates, the blocking portion 15 is The light part 15 can always play the role of blocking light.
- the light blocking part 15 expands and contracts with the beam 16 relative to the platform 11 in the vertical height direction Z, and keeps the upper end surface of the light blocking part 15 not lower than that of the curing lamp 14. The bottom surface is to prevent the light emitted by the curing lamp 14 from being reflected to the print head 12.
- the lower end of the light blocking portion 15 is fixed on the platform 11, the upper end is rotatably connected to the beam 16, and the light blocking portion 15 is compressed between the platform 11 and the beam 16, and the beam 16 is raised and lowered relative to the platform 11 in the vertical height direction Z.
- the light blocking part 15 is driven to expand and contract, and other devices that drive the light blocking part 15 to expand and contract can be eliminated.
- the three-dimensional printing device 1 further includes a support frame 17, in the vertical height direction Z, the support frame 17 is located below the platform 11; the platform 11 is provided There is a through hole 111, the light blocking portion 15 passes through the through hole 111 and is connected to the support frame 17, and the light blocking portion 15 has no contact with the platform 11; during the relative movement of the beam 16 and the platform 11 in the vertical height direction Z, the light is blocked
- the portion 15 can be stretched and contracted to keep the upper end surface of the light blocking portion 15 not lower than the bottom surface of the curing lamp 14.
- the lower end of the light-blocking portion 15 passes through the platform 11 and is fixed on the support frame 17, keeping the upper end surface of the light-blocking portion 15 not lower than the bottom surface of the curing lamp 14, or the upper end of the light-blocking portion 15 is fixed on the beam 16 along with the print head 12.
- the molding layers of the printing target model 13 are superimposed layer by layer, the distance between the beam 16 and the platform 11 gradually increases, and the light blocking portion 15 can be stretched in the vertical height direction Z to prevent the light emitted by the curing lamp 14 from being reflected to the print head 12 .
- the light blocking portion 15 is an arc-shaped column or prism, the upper end of the light blocking portion 15 is fixed on the beam 16, and the light blocking portion 15 passes through the through hole of the platform 11.
- 111 is fixed on the support frame 17 and not in contact with the platform 11, so as to avoid friction with the platform 11, the light blocking part 15 can expand and contract with the beam 16 relative to the platform 11 in the vertical height direction Z.
- the light emitted by the curing lamp 14 is blocked from being reflected to the printing head 12, and the light blocking portion 15 is close to the curing lamp 14, so as not to occupy the buffer area of the printing head 12 as much as possible, and to avoid collision with the printing head 12 as much as possible.
- the three-dimensional printing device 1 further includes a beam 16, the curing lamp 14 and the print head 12 are arranged on the beam 16; the beam 16 and/or the platform 11 can be along the vertical height
- the direction Z moves relative to change the distance between the two, and during the relative movement of the two, keep the upper end surface of the light blocking portion 15 lower than the bottom surface of the curing lamp 14, and the upper end surface of the light blocking portion 15 is not lower than The upper end face of the target model 13.
- the height of the light blocking portion 15 increases as the distance between the print head 12 and the platform 11 increases.
- the light blocking portion 15 can always function to block the light emitted by the curing lamp 14 from being reflected to the print head 12.
- the light blocking portion 15 is provided on the platform 11; along the vertical height direction Z, the light blocking portion 15 can be stretched to block the emitted light and reflection of the curing lamp 14 The light is irradiated to the print head 12.
- the light blocking portion 15 is a hollow cylinder or hollow prism, and the light blocking portion 15 is fixed on the platform 11 and rotates as the platform 11 rotates.
- the light blocking part 15 can always play a role in blocking light.
- the light blocking part 15 expands and contracts as the beam 16 rises and falls in the vertical height direction Z relative to the platform 11, keeping the upper end surface of the light blocking part 15 lower than the curing lamp 14
- the bottom surface of the light-blocking portion 15 is also kept not lower than the upper end surface of the target model 13, so as to prevent the light emitted by the curing lamp 14 from being reflected to the print head 12.
- the three-dimensional printing device 1 further includes a connecting component, and the light blocking portion 15 is connected to the connecting component; the beam 16 and the platform 11 are opposed to each other in the vertical height direction Z During the movement, driven by the connecting assembly, the light blocking portion 15 can move in the vertical height direction Z, and the light blocking portion 15 can pass through the platform 11 during the movement.
- the distance between the beam 16 and the platform 11 gradually increases, and the light blocking portion 15 has a sufficient length so that the connecting assembly controls the light blocking portion 15 along the vertical height direction
- the light emitted by the curing lamp 14 can be completely blocked from being reflected on the print head 12, and the light blocking portion 15 is not retractable.
- the light blocking portion 15 can pass through the platform 11 without contacting the platform 11.
- the light blocking portion 15 is a hollow cylinder or hollow prism.
- the upper end surface of the light blocking portion 15 is kept lower than the bottom surface of the curing lamp 14, and the light blocking portion 15 is also maintained
- the upper end surface of the target model 13 is not lower than the upper end surface of the target model 13, and the light blocking portion 15 passes through the platform 11 and does not contact the platform 11. It moves up and down in the vertical height direction Z and moves relative to the platform 11 to prevent the light emitted by the curing lamp 14 from being reflected on the print head 12.
- the three-dimensional printing device 1 further includes a support frame 17, the support frame 17 is located under the platform 11; the platform 11 is provided with a through hole 111, the light blocking part 15 is connected to the support frame 17 through the through hole 111, and the light blocking portion 15 has no contact with the platform 11; during the relative movement of the beam 16 and the platform 11 in the vertical height direction Z, the light blocking portion 15 can expand and contract to prevent curing The emitted light and reflected light of the lamp 14 irradiate the print head 12.
- the lower end of the light-blocking part 15 passes through the platform 11 and is fixed on the support frame 17, and the forming layers of the target model 13 are superimposed layer by layer as the print head 12 prints.
- the distance between the beam 16 and the platform 11 gradually increases, and the light-blocking part 15 can be vertically
- the vertical height direction Z stretches and contracts to prevent the light emitted by the curing lamp 14 from being reflected to the print head 12.
- the light blocking portion 15 is a hollow cylinder or hollow prism, keeping the upper end surface of the light blocking portion 15 lower than the bottom surface of the curing lamp 14, and also maintaining the light blocking portion 15
- the upper end surface of the target model 13 is not lower than the upper end surface of the target model 13, and at least part of the light blocking portion 15 passes through the through hole 111 of the platform 11 and is fixed on the support frame 17, and the light blocking portion 15 does not contact the platform 11 to avoid contact with the platform 11.
- the light blocking portion 15 can expand and contract as the beam 16 rises and falls in the vertical height direction Z relative to the platform 11 to prevent the light emitted by the curing lamp 14 from being reflected to the print head 12.
- the connecting component (not shown in the figure) can be an air cylinder, a telescopic rod, a pulley block or other equipment, and the light blocking part 15 can be raised and lowered.
- the way of lifting the light blocking part 15 is not limited.
- the connecting component can be installed on the beam 16 or the support frame 17; it can be connected to the upper end surface of the light blocking portion 15 or can be connected to the lower end surface of the light blocking portion 15 to drive the light blocking portion 15 Mobile.
- the light blocking portion 15 is formed by the printing head 12 ejecting printing materials onto the platform 11, that is, the printing head 12 prints the light blocking portion 15 while printing the target model 13.
- part of the light (including emitted light and/or reflected light) emitted by the curing lamp 14 is irradiated to the light blocking part 15, so that part of the light emitted by the curing lamp 14 is blocked by the light blocking part 15 and reflected to the printing plate 11
- the head 12 reduces to a certain extent the risk that the nozzle holes of the print head 12 are blocked, or the material attached to the surface of the print head 12 is solidified and difficult to clean, thereby improving the service life and printing accuracy of the print head.
- the print head 12 is inputted with printing data, the print head 12 is controlled to move back and forth along the radial direction A of the platform 11, and the printing material is ejected onto the platform 11 to form the target model 13 and block the light.
- the print head 12 is inputted with printing data, the print head 12 is controlled to move back and forth along the radial direction A of the platform 11, and the printing material is ejected onto the platform 11 to form the target model 13 and block the light.
- the light emitted by the curing lamp 14 cures the light-curing material, wherein the material of the target model 13 is a light-curing material, and the light blocking part 15 can be a light-curing
- the molding layer formed by the curing lamp 14 irradiating the printing material includes the molding layer of the target model 13 and the molding layer of the light blocking portion 15, or the light blocking portion 15 may also be a non-photocurable material.
- the molding layer formed by irradiating the printing material by the curing lamp 14 The layer includes the molding layer of the target model 13, and other factors make the printing material mold to form the molding layer of the light blocking portion 15, thereby forming the target model 13 and the light blocking portion 15.
- photocurable materials are materials that are cured after curing light irradiation, such as photosensitive resins, PLA materials (polylactic acid is also called polylactide) and other materials; non-photocurable materials are materials that can be cured without curing light irradiation, such as Temperature-curable materials, materials that are cured after being affected by temperature, such as epoxy resins, waxes and other materials.
- the light blocking portion 15 is a photocurable material
- the light of the curing lamp 14 irradiates the light blocking portion 15 to cure the light blocking portion 1, and the spray light blocking portion 15 can be cured.
- the injection hole is the injection hole of the target model 13, that is, the light blocking part 15 and the target model 13 share the injection hole.
- the light blocking part 15 is injected before the target model 13 is injected to clear the injection hole when the target model 13 material is injected to improve the target
- the printing quality of the model 13 alternatively, the nozzle holes of the material of the light blocking portion 15 may not be the nozzle holes of the material of the target model 13, that is, the nozzle holes of the material of the light blocking portion 15 and the nozzle of the target model 13
- the nozzle holes of the material are different nozzle holes.
- the light blocking portion 15 when the light blocking portion 15 is a non-photocurable material, the light blocking portion 15 may be a temperature curing material. At this time, the material of the light blocking portion 15 is printed on the platform 11 and cured under the influence of temperature.
- the light blocking portion 15 may also be other non-photocurable materials that can block the light emitted by the curing lamp 14 from being reflected to the print head 12.
- the material of the printing light blocking portion 15 has a light absorption effect and has a high light absorption rate, so as to reduce the multiple reflections of the light emitted by the curing lamp 14 by the light blocking portion 15; the thickness of the light blocking portion 15 formed by printing can block the curing light That is, it does not need to be too thick to save printing materials.
- the platform 11 rotates around its own axis of rotation 112, so that the target model 13 and the gear
- the light part 15 rotates with the platform 11.
- the platform 11 can be driven to rotate around its rotation axis 112 by a driving device to drive the target model 13 and the light blocking part 15 to rotate with the platform 11.
- the target model 13 and the light blocking part 15 pass through the coverage area irradiated by the curing lamp 14 during the rotation process.
- the printing material of the model 13 is irradiated and cured by the curing lamp 14, and the printing material of the light blocking portion 15 is irradiated and cured by the curing lamp 14 or cured due to other factors. Repeat the process of ejecting the printing material and curing the printing material by the print head until the target model 13 is printed.
- the shape of the light blocking portion 15 is not limited.
- the light blocking portion 15 rotates with the rotation of the platform 11, it can block the light emitted by the curing lamp 14 from irradiating the print head 12.
- the central angle of the light blocking portion 15 with the center of the platform 11 as the center is less than or equal to 360°. Specifically, the central angle of the light blocking portion 15 with the center of the platform 11 as the center may be equal to 360°.
- the light blocking portion 15 can always play a role of blocking light, where: When 15 is a light-curing material, the curing lamp 14 can always be turned on during the printing process, and the entire curing light 14 can be turned on or only the segment corresponding to the area where the target model 13 is located; when the light blocking part 15 is a non-light-curing material When the curing lamp 14 is turned on during the printing process or only when the target model 13 enters the coverage area of the curing lamp 14, the entire curing lamp 14 can be turned on or only the segment corresponding to the area where the target model 13 is located; When the light blocking portion 15 is a non-photocurable material, the central angle of the light blocking portion 15 may be less than 360°.
- the print head 12 is farther away from the platform 11, which increases the height of the target model 13 and the light blocking portion 15.
- the distance between the print head 12 and the platform 11 gradually increases.
- the curing lamp 14 may already be at a higher position relative to the platform 11, and the target model 13 is formed during the forming process. There is no effect on the irradiation in, control the print head 12 to move upwards, or control the platform 11 to move downwards, so that the print head 12 can maintain the same distance from each forming layer of the target model 13 to ensure the print quality of the target model 13.
- the distance between the print head 12 and the curing lamp 14 relative to the platform 11 gradually increases, and the print head 12 and curing lamp 14 are controlled to move upwards synchronously, or the platform is controlled 11 moves down, so that the print head 12 and the curing lamp 14 can maintain the same distance from each molding layer of the target model 13 to ensure the printing quality of the target model 13.
- the height of the light blocking portion 15 is less than or equal to the height of the target model 13.
- the distance between the curing lamp 14 and the platform 11 also increases. The greater the amount of curing light reflected by the curing lamp 14 to the print head 12 via the platform 11, but the curing lamp 14 After the distance between the platforms 11 exceeds a certain height, the curing light reflected to the print head 12 will not increase as the distance between the curing lamp 14 and the platform 11 increases.
- the light blocking part 15 and the target model 13 are kept at the same height.
- the light blocking part 15 can no longer be printed, and the target model 13 can be printed until the task is completed, thus saving the printing block.
- the print head 12 When the print head 12 reciprocates along the radial direction A of the platform 11, it needs buffer space when accelerating and decelerating, so that the length of the curing lamp 14 does not exceed the rotation axis 112 of the platform 11, and there is a certain preset distance R between the two.
- the distance R is the buffer space of the print head 12 to reduce the risk of collision with the curing lamp 14 during the movement of the print head 12.
- the preset distance R forms a circular non-printing area 113, because the non-printing area 113 It is the buffer space of the print head 12.
- the print head 12 moves to the inside of the printing area, it stops ejecting printing materials, so that the light blocking portion 15 and the target model 13 are printed on the outside of the non-printing area 113, and the light blocking portion 15 is relative to the target model. 13 is close to the non-printing area 113 so that the light blocking part 15 can block the light emitted by the curing lamp 14 from being reflected to the printing head 12 via the platform 11.
- the radius of the non-printing area 113 may be equal to the radius of the platform 11 minus the length of the curing lamp 14.
- the minimum distance d between the light blocking portion 15 and the rotation axis 112 of the platform 11 is greater than or equal to the radius R of the non-printing area 113, and the maximum distance D between the light blocking portion 15 and the rotation axis 112 of the platform 11 is less than the target The minimum distance L between the model 13 and the rotation axis 112 of the platform 11.
- the light blocking portion 15 may be centered on the center of the platform 11, so that the center angle corresponding to the light blocking portion 15 is equal to 360 degrees.
- the central angle of the light blocking part 15 is equal to 360°, and the light blocking part 15 can be printed as a ring structure.
- the light blocking part 15 can be a light-curing material, or the light blocking part 15 can also be a non-curing material;
- the curing lamp 14 can be turned on only when the light curing material enters the coverage area of the curing lamp 14 and turned off at the rest of the time, or the curing lamp 14 can also be controlled in sections. Only open the segment corresponding to the area where the target model 13 is located.
- the light blocking portion 15 may be a hollow cylinder, a hollow prism, a column of other shapes, or other irregular hollow entities.
- the cross-sectional shape of the hollow area of the light blocking portion 15 may also be a square, circular or other cross-sectional hollow area, so that the light blocking portion 15 can block the light emitted by the curing lamp 14 to the print head 12.
- the light blocking portion 15 may be a photocurable material or a non-photocurable material
- the light blocking portion 15 is a hollow prism
- the hollow area of the light blocking portion 15 is The cross section is square
- the light blocking part 15 is printed on the outside of the non-printing area 113
- part of the light emitted by the curing lamp 14 is directly blocked by the light blocking part 15 to prevent the light from being reflected by the platform 11 and irradiating to the print head 12
- the curing lamp 14 emits Part of the light reflected by the platform 11 is blocked by the light blocking portion 15 to prevent the light from being reflected to the print head 12, so that the light blocking portion 15 blocks part of the light emitted by the curing lamp 14 from being reflected by the platform 11 to the print head 12, reducing After the small print head 12 is irradiated with curing light, there is a risk that the material in the nozzle aperture or the material attached to the surface will be cured.
- the non-printing area 113 has an outer edge.
- the light blocking portion 15 is printed at a first position. In the first position, along the radial direction A of the platform 11, light is blocked. The portion 15 is close to the outer edge of the non-printing area 113, reducing the printing volume of the light blocking portion 15, thereby reducing the material consumption of the printing light blocking portion 15 and saving costs.
- the difference between the minimum distance d between the light blocking portion 15 and the rotation axis 112 of the platform 11 and the radius R of the non-printing area 113 is greater than or equal to 0 and less than or equal to 15 mm, This embodiment does not specifically limit this.
- the light blocking portion 15 may be a photocurable material or a non-photocurable material
- the light blocking portion 15 is a hollow cylinder
- the hollow area of the light blocking portion 15 is Round
- the light blocking portion 15 is printed on the outside of the non-printing area 113 and printed at a position close to the outer edge of the non-printing area 113, so that the minimum distance d between the light blocking portion 15 and the rotation axis 112 of the platform 11 is slightly larger than that of the non-printing area 113
- the radius R of ⁇ can reduce the material consumption of the light-blocking part 15 for printing, and save the cost.
- the light blocking portion 15 is printed at the second position. In the second position, along the radial direction A of the platform 11, the light blocking portion 15 is away from the outer edge of the non-printing area 113, and the light blocking portion 15 is close to the target model 13 to shorten the reciprocating distance of the print head 12 along the radial direction A of the platform 11 and increase the printing speed.
- the difference between the minimum distance L between the target model 13 and the rotation axis 112 of the platform 11 and the maximum distance D between the light blocking portion 15 and the rotation axis 112 of the platform 11 is greater than It is equal to 2 mm and less than or equal to 10 mm, which is not specifically limited in this embodiment.
- the light blocking portion 15 may be a photocurable material or a non-photocurable material.
- the light blocking portion 15 is printed as a hollow cylinder, and the light blocking portion 15 is hollow.
- the area is circular.
- the light blocking part 15 is printed on the outside of the non-printing area 113 and printed on the platform 11 close to the target area.
- the maximum distance D between the light blocking part 15 and the rotation center of the platform 11 is slightly smaller than the target model 13 and
- the minimum distance L of the rotation axis 112 of the platform 11 shortens the distance that the print head 12 moves along the radial direction A of the platform 11, and also increases the distance between the print head 12 and the curing lamp 14 during the movement of the print head 12 in the radial direction A.
- Part of the light emitted by the lamp 14 after being reflected by the platform 11 is not sufficient to illuminate the position of the print head 12, which reduces the probability of the print head 12 being cured. As shown in FIGS.
- the center angle corresponding to the light blocking portion 15 is less than or equal to 360 degrees, and the material forming the light blocking portion 15 is a non-photocurable material.
- the material of the printing light blocking portion 15 is a non-photocurable material, the light blocking portion 15 does not need to be irradiated by the curing lamp 14, so the curing lamp 14 does not need to be turned on all the time during the printing process, only the time period during which the target model 13 is irradiated.
- the corresponding light blocking portion 15 only needs to block the curing light from irradiating the print head 12 during the time period when the curing lamp 14 is turned on.
- the center angle corresponding to the light blocking portion 15 can be less than or equal to 360 degrees, that is, the light blocking portion 15 does not need to be closed.
- the ring structure can be the arc structure shown in FIG. 25 to FIG. 30, which saves the material for printing the light blocking portion 15.
- the light blocking portion 15 can also be printed in other structures, such as a fan shape, a cylinder, etc., which can block the curing light from being irradiated to the position of the print head 12 during the time period when the curing lamp 14 is turned on.
- the central angle corresponding to the light blocking portion 15 corresponding to the width W of the curing lamp 14 is the first angle ⁇ ; the target model 13 is rotated to When entering the coverage of the curing lamp 14, the curing lamp 14 is turned on so that the curing lamp 14 illuminates the target model 13.
- the curing lamp 14 is turned off, and the target model 13 changes from entering to Turn the second angle ⁇ when leaving the coverage of the curing lamp 14; during the process from turning on the curing lamp 14 to turning off the curing lamp 14, the center angle corresponding to the printed light blocking portion 15 is the third angle ⁇ .
- ⁇ 360°, ⁇ ⁇ + ⁇ , when ⁇ + ⁇ 360°, ⁇ 360°.
- the central angle corresponding to the light blocking portion 15 is the third angle ⁇ , and the central angle corresponding to the light blocking portion 15 corresponding to the width W of the curing lamp 14 is the first angle ⁇ .
- the center angle of the rotation of a point on the target model 13 is the second angle ⁇ , and ⁇ is slightly larger than ⁇ + ⁇ , so as to satisfy that the light blocking part of the curing lamp 14 is turned on to off during the period of time. 15 can block part of the light emitted by the curing lamp 14 from irradiating the print head 12 during the rotation of the platform 11.
- the first angle ⁇ of the light blocking portion 15 is smaller, and the value of the third angle ⁇ of the corresponding light blocking portion 15 is also smaller. , So that the central angle of the light blocking portion 15 can be less than 360°, and the material for printing the light blocking portion 15 can be saved.
- the light blocking portion 15 is made of a non-photocurable material, and the light blocking portion 15 and the target model 13 are printed on different sides of the rotation axis 112, and the target model 13 enters and leaves to be cured. In the process of covering the area of the lamp 14, the curing lamp 14 is turned on.
- the light blocking part 15 When the curing lamp 14 is turned on, the light blocking part 15 is always located on the opposite side of the curing lamp 14, so that part of the light emitted by the curing lamp 14 is reflected by the platform 11
- the light blocking portion 15 blocks to prevent the reflected light from irradiating the print head 12, and the curing lamp 14 is only turned on when the target model 13 is irradiated, which saves curing light resources.
- the curing lamp 14 when the target model 13 rotates to enter the coverage of the curing lamp 14, the curing lamp 14 is turned on to correspond to the segment of the area where the target model 13 is located, and when the target model 13 rotates to leave the coverage of the curing lamp 14, the curing lamp 14 is turned off ,
- the light blocking part 15 and the target model 13 are printed on the same side of the rotation axis 112. Part of the light emitted by the curing lamp 14 is directly blocked by the light blocking part 15 to prevent part of the emitted light from being reflected by the platform 11 and irradiated to the print head 12.
- the light blocking portion 15 is a non-light-curing material
- the target model 13 enters and leaves the area covered by the curing lamp 14, the curing lamp 14 is turned on and the area where the target model 13 is located.
- the corresponding segment is sufficient.
- the curing lamp 14 is turned on, the position of the light blocking part 15 and the curing lamp 14 are always opposite to prevent the curing light from being irradiated to the print head 12, and the light blocking part 15 and the target model 13 are printed on the same axis of the rotation axis 112.
- the distance between the light blocking portion 15 and the curing lamp 14 is also relatively short, so that part of the light emitted by the curing lamp 14 can be directly blocked by the light blocking portion 15.
- the curing lamp 14 implements segmented control, and the curing lamp 14 only needs to turn on the segment corresponding to the target model 13, which not only reduces the coverage of the curing lamp 14 but also increases the radiation emitted by the curing lamp 14
- the distance between the light and the print head 12 reduces the probability of the material on the print head 12 being cured, and saves curing light resources.
- the present application also provides a three-dimensional printing method applied to the three-dimensional printing device provided in any embodiment of the present application.
- the three-dimensional printing method includes: controlling the print head 12 to eject printing materials onto the platform 11 to form at least the target model 13. Specifically, the print head 12 ejects the printing material onto the platform 11, the curing lamp 14 can irradiate to cure at least part of the printing material, and at least part of the printing material is laminated to form the target model 13.
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Abstract
Description
Claims (27)
- 一种三维打印设备,其特征在于,所述三维打印设备包括:平台;打印头,所述打印头用于喷射打印材料到平台上;固化灯,所述固化灯用于照射以使至少部分所述打印材料固化,至少部分所述打印材料形成目标模型;其中,在竖直高度方向(Z)上,所述打印头和所述固化灯位于所述平台的上方;挡光部,用于阻挡所述固化灯发射的光线反射到所述打印头上。
- 根据权利要求1所述的三维打印设备,其特征在于,所述挡光部设置在所述固化灯与所述打印头之间。
- 根据权利要求2所述的三维打印设备,其特征在于,所述挡光部的上端面不低于所述固化灯的底面。
- 根据权利要求3所述的三维打印设备,其特征在于,所述三维打印设备还包括横梁,所述固化灯和所述打印头设置于所述横梁;所述横梁和所述平台能够沿竖直高度方向(Z)相对运动,以改变二者之间的距离,且二者相对运动的过程中,保持所述挡光部的上端面不低于所述固化灯的底面。
- 根据权利要求4所述的三维打印设备,其特征在于,所述三维打印设备还包括连接组件,所述挡光部与所述连接组件连接;所述横梁和所述平台沿竖直高度方向(Z)相对运动的过程中,在所述连接组件的带动下,所述挡光部能够沿竖直高度方向(Z)运动,且所述挡光部运动的过程中,能够穿过所述平台和/或横梁,以保持所述挡光部的上端面不低于所述固化灯的底面,所述挡光部的底面与所述平台的上端面保持存在间隙,以使所述挡光部与所述平台无接触;或者,所述平台设置有通孔,所述挡光部的至少部分能够伸入所述通孔,且所述挡光部与所述平台无接触。
- 根据权利要求4所述的三维打印设备,其特征在于,所述挡光部与所述横梁连接,所述挡光部能够伸缩,且伸缩过程中,所述挡光部的底面与所述平台的上端面保持存在间隙,以使所述挡光部与所述平台无接触;或者,所述挡光部与所述横梁连接,所述平台设置有通孔,所述挡光部能够伸缩,且伸缩过程中,所述挡光部的至少部分能够伸入所述通孔,且所述挡光部与所述平台无接触。
- 根据权利要求4所述的三维打印设备,其特征在于,所述挡光部与所述平台连接,所述挡光部能够伸缩,以保持所述挡光部的上端面不低于所述固化灯的底面。
- 根据权利要求4所述的三维打印设备,其特征在于,所述三维打印设备还包括支撑架,在竖直高度方向(Z)上,所述支撑架位于所述平台的下方;所述平台设置有通孔,所述挡光部穿过所述通孔与所述支撑架连接,且所述挡光部与所述平台无接触;所述横梁和所述平台沿竖直高度方向(Z)相对运动的过程中,所述挡光部能够伸缩,以保持所述挡光部的上端面不低于所述固化灯的底面。
- 根据权利要求2所述的三维打印设备,其特征在于,所述挡光部的上端面低于所述固化灯的底面。
- 根据权利要求9所述的三维打印设备,其特征在于,所述挡光部的上端面不低于所述目标模型的上端面。
- 根据权利要求10所述的三维打印设备,其特征在于,所述三维打印设备还包括横梁,所述固化灯和所述打印头设置于所述横梁;所述横梁和所述平台能够沿竖直高度方向(Z)相对运动,以改变二者之间的距离,且二者相对运动的过程中,保持所述挡光部的上端面低于所述固化灯的底面,且所述挡光部的上端面不低于所述目标模型的上端面。
- 根据权利要求11所述的三维打印设备,其特征在于,所述挡光部设置于所述平台;沿竖直高度方向,所述挡光部能够伸缩,以阻挡所述固化灯的发射光和反射光照射至所述打印头。
- 根据权利要求11所述的三维打印设备,其特征在于,所述三维打印设备还包括连接组件,所述挡光部与所述连接组件连接;所述横梁和所述平台沿竖直高度方向(Z)相对运动的过程中,在所述连接组件的带动下,所述挡光部能够沿竖直高度方向(Z)运动,且所述挡光部运动的过程中,能够穿过所述平台。
- 根据权利要求11所述的三维打印设备,其特征在于,所述三维打印设备还包括支撑架,所述支撑架位于所述平台的下方;所述平台设置有通孔,所述挡光部穿过所述通孔与所述支撑架连接,且所述挡光部与所述平台无接触;所述横梁和所述平台沿竖直高度方向(Z)相对运动的过程中,所述挡光部能够伸缩,以阻挡所述固化灯的发射光和反射光照射到所述打印头。
- 根据权利要求2~14中任一项所述的三维打印设备,其特征在于,所述平台能够绕转动轴线转动,所述固化灯与所述平台的转动轴线之间具有预设距离R,所述平台转动的过程中,所述预设距离R形成非打印区域;所述挡光部设置于所述非打印区域的内侧,所述目标模型打印于所述非打印区域的外侧。
- 根据权利要求2~14中任一项所述的三维打印设备,其特征在于,沿所述固化灯的宽度方向(X),所述挡光部长于所述固化灯。
- 根据权利要求2~14中任一项所述的三维打印设备,其特征在于,所述目标模型转动到进入所述固化灯的覆盖区域时,开启所述固化灯对应所述目标模型所在区域的分段,所述目标模型转动到离开所述固化灯覆盖区域时,关闭所述固化灯。
- 根据权利要求1所述的三维打印设备,其特征在于,所述挡光部由所述打印头喷射打印材料到所述平台上形成。
- 根据权利要求18所述的三维打印设备,其特征在于,所述平台绕其自身的转动轴线转动,以使所述目标模型和所述挡光部随所述平台转动。
- 根据权利要求19所述的三维打印设备,其特征在于,沿所述平台的径向,所述固化灯与所述平台的转动轴线之间具有预设距离R,所述平台转动的过程中,所述预设距离R形成非打印区域;所述挡光部和所述目标模型打印于所述非打印区域的外侧,且所述挡光部相对于所述目标模型靠近所述非打印区域。
- 根据权利要求20所述的三维打印设备,其特征在于,所述挡光部打印于第一位置,在所述第一位置,沿所述平台的径向,所述挡光部靠近所述非打印区域的外边缘;或者,所述挡光部打印于第二位置,在所述第二位置,沿所述平台的径向,所述挡光部远离所述非打印区域的外边缘。
- 根据权利要求21所述的三维打印设备,其特征在于,所述挡光部对应的圆心角等于360度。
- 根据权利要求21所述的三维打印设备,其特征在于,所述挡光部对应的圆心角小于或等于360度,其中,形成所述挡光部的打印材料为非光固化材料。
- 根据权利要求23所述的三维打印设备,其特征在于,所述固化灯的宽度W对应的所述挡光部对应的圆心角为第一角度α;所述目标模型转动到进入所述固化灯的覆盖范围时,开启所述固化灯,以使所述固化灯照射所述目标模型,所述目标模型转动到离开所述固化灯的覆盖范围时,关闭所述固化灯,且所述目标模型从进入到离开所述固化灯的覆盖范围时转动第二角度β;开启所述固化灯至关闭所述固化灯过程中,打印的所述挡光部对应的圆心角为第三角度θ,当α+β小于360度时,θ≥α+β,当α+β大于或等于360度时,θ=360度。
- 根据权利要求24所述的三维打印设备,其特征在于,在所述目标模型转动到进入所述固化灯的覆盖范围时,开启所述固化灯,所述目标模型转动到离开所述固化灯的覆盖范围时,关闭所述固化灯,所述挡光部与所述目标模型打印于所述转动轴线的不同侧;或者,在所述目标模型转动到进入所述固化灯的覆盖范围时,开启所述固化灯对应于所述目标模型所在区域的分段,所述目标模型转动到离开所述固化灯的覆盖范围时,关闭所述固化灯,所述挡光部与所述目标模型打印于所述转动轴线的同侧。
- 根据权利要求18~25所述的三维打印设备,其特征在于,所述挡光部的高度小于或等于所述目标模型的高度。
- 一种三维打印方法,应用于权利要求1~26任一项所述的三维打印设备,其特征在于,所述三维打印方法包括:控制所述打印头喷射打印材料到所述平台上,以至少形成目标模型。
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