CN116766585A - Rotary 3D printing system and printing method - Google Patents
Rotary 3D printing system and printing method Download PDFInfo
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- CN116766585A CN116766585A CN202310976180.6A CN202310976180A CN116766585A CN 116766585 A CN116766585 A CN 116766585A CN 202310976180 A CN202310976180 A CN 202310976180A CN 116766585 A CN116766585 A CN 116766585A
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- 238000007639 printing Methods 0.000 title claims abstract description 132
- 238000010146 3D printing Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 237
- 239000000758 substrate Substances 0.000 claims abstract description 67
- 238000007790 scraping Methods 0.000 claims abstract description 23
- 238000011084 recovery Methods 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000000465 moulding Methods 0.000 claims abstract description 18
- 238000005245 sintering Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims description 14
- 238000003860 storage Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000003892 spreading Methods 0.000 abstract description 21
- 230000007480 spreading Effects 0.000 abstract description 21
- 238000004064 recycling Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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
- B29C64/20—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
- B29C64/10—Processes of additive manufacturing
- B29C64/141—Processes of additive manufacturing using only solid materials
- B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
-
- 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
- B29C64/205—Means for applying layers
- B29C64/214—Doctor blades
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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
- B29C64/245—Platforms or substrates
-
- 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
- B29C64/255—Enclosures for the building material, e.g. powder containers
-
- 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
- B29C64/264—Arrangements for irradiation
- B29C64/268—Arrangements for irradiation using laser beams; using electron beams [EB]
-
- 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
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
Abstract
The invention provides a rotary 3D printing system and a printing method, comprising the following steps: a mounting frame; the rotary printing table is fixedly arranged on the mounting frame in a rotating manner; a powder forming cavity which is arranged on the printing reference platform; the powder recovery cavity is arranged on the printing reference platform; the molding substrate is positioned in the powder molding cavity and extends along the circumferential arc of the rotary printing table; the substrate driving device comprises a lifting plate block for bearing the forming substrate and a driver for driving the lifting plate block to move up and down; the powder supply bin is arranged on the mounting frame and is positioned above the rotary printing table; the laser device is arranged on the mounting frame and is positioned above the rotary printing table; the powder spreading mechanism comprises a scraper mounting frame and a powder scraping knife. The invention can synchronously and continuously carry out powder spreading operation and laser scanning sintering operation, has good powder spreading uniformity and short total powder spreading time, and greatly improves 3D printing efficiency.
Description
Technical Field
The invention relates to the technical field of 3D printing additive manufacturing, in particular to a rotary 3D printing system and a printing method.
Background
Under the control of a computer control system, the traditional SLS, SLM and EBM devices are used for spreading powder materials on a substrate through a 3D printing powder feeding and spreading system, then an energy source (generally a laser vibrating mirror or an electron beam) is utilized to move along the X axis and the Y axis, the energy source sinters the powder materials spread on the substrate in the moving process, a layer of thick substrate is lowered by a layer of thick distance after sintering, then a layer of powder is spread and sintered, and finally a solid is obtained through progressive lamination of consumable materials on the substrate.
The 3D printing device disclosed in the prior art is mostly based on the principle that the material powder is firstly paved on the substrate and then sintered by an energy source, so that the powder paving is not uniform, the total powder paving time is long, and the comprehensive efficiency is low.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention is to provide a rotary 3D printing system and printing method, which can make the powder laying operation and the laser scanning sintering operation synchronously and continuously performed, so that the powder laying uniformity of the powder laying mechanism is good, the total powder laying time is short, and the 3D printing efficiency is greatly improved.
In order to solve the above technical problems, the present invention provides a rotary 3D printing system, including:
a mounting frame;
the rotary printing table is fixedly arranged on the mounting frame in a rotating way, and the top end surface of the rotary printing table forms a printing reference platform;
the powder forming cavity is arranged on the printing reference platform and extends along the circumferential arc line of the rotary printing table;
the powder recovery cavity is arranged on the printing reference platform, and the powder recovery cavity and the powder forming cavity are adjacently arranged along the circumferential direction of the rotary printing table;
the molding substrate is positioned in the powder molding cavity and extends along the circumferential arc of the rotary printing table, and the molding substrate is used for bearing products;
the substrate driving device comprises a lifting plate for bearing the forming substrate and a driver for driving the lifting plate to move up and down, the lifting plate is positioned in the powder forming cavity, the shape of the lifting plate is matched with that of the powder forming cavity, and the driver rotates along with the fixed shaft rotation of the rotary printing table;
the powder supply bin is arranged on the mounting frame and is positioned above the rotary printing table to release the powder stored by the powder supply bin to the printing reference platform;
the laser device is arranged on the mounting frame and is positioned above the rotary printing table so as to project a light beam onto the forming substrate;
spread the powder mechanism, spread the powder mechanism and include scraper mounting bracket and scrape the powder sword, scraper mounting bracket is located to the scraper mounting bracket, scrapes the powder sword and locates the scraper mounting bracket, scrapes the powder sword and be located the top of gyration printing table and along the radial extension of gyration printing table, scrapes the powder sword and is used for scraping the powder on the shaping base plate and push into the powder recovery intracavity with unnecessary powder.
Preferably, the scraper mounting frame comprises a support column and a cantilever rod for mounting the scraper, the support column is arranged at the center of the rotary printing table in a penetrating way, the mounting frame is arranged, and the cantilever rod is arranged on the support column.
Preferably, the cantilever rod extends along the radial straight line of the rotary printing table, and the radial inner end of the cantilever rod is fixed on the support column.
Preferably, the projection position of the laser device on the forming substrate is marked as an irradiation position, the projection position of the powder supply bin on the forming substrate is marked as a powder falling position, the projection position of the powder scraping knife on the forming substrate is marked as a powder scraping position, and the powder falling position, the powder scraping position and the irradiation position are sequentially arranged along the rotation direction of the rotary printing table.
Preferably, the driver comprises a servo motor fixedly connected with the rotary printing table and a screw rod in transmission connection with the servo motor, and the screw rod is threaded through the lifting plate.
Preferably, the powder supply bin comprises a storage container, a powder outlet is formed in the bottom of the storage container, and a switch valve is arranged on the powder outlet.
Preferably, the cross section of the storage container is gradually smaller from top to bottom.
Preferably, the powder forming cavity is fan-shaped, and the angle corresponding to the arc-shaped extending track of the powder forming cavity is larger than 180 degrees.
Preferably, the top end surface of the rotary printing table has an outer convex edge and an inner convex edge which are concentrically arranged, and the outer convex edge and the inner convex edge jointly define the printing reference table into a circular ring shape.
The invention also provides a printing method adopting the rotary 3D printing system, which comprises the following steps:
the powder supply bin releases the powder stored by the powder supply bin to the printing reference platform according to the preset throwing amount;
the rotary printing table starts to rotate according to a preset rotation direction, and in the rotation process, the powder scraping knife spreads the powder on the upper surface of the forming substrate;
when the forming substrate paved with the powder rotates to the lower part of the laser device, the laser device starts scanning and sintering the powder;
when the powder scraping knife is positioned above the powder recovery cavity after passing through the powder forming cavity, the powder scraping knife pushes redundant powder into the powder recovery cavity; meanwhile, the driver drives the lifting plate to descend one printing layer, the forming substrate moves synchronously with the lifting plate, then the powder supply bin releases powder for the second time, and the rotary 3D printing system enters the printing operation process of the second layer, and the process is circulated until the product is formed.
As described above, the rotary 3D printing system and printing method of the present invention have the following beneficial effects: the mounting frame is the installation, layout and bearing structure of the rotary 3D printing system, and provides mounting positions for parts and mechanisms of the rotary 3D printing system except the mounting frame. The rotary printing table is generally cylindrical and is pivotable relative to the mounting frame. Because the powder forming cavity and the powder recycling cavity are both arranged on the printing reference platform, when the rotary printing table rotates along with the fixed shaft, the powder forming cavity and the powder recycling cavity rotate along with the rotary printing table. The forming substrate is positioned in the powder forming cavity and extends along the circumferential arc of the rotary printing table, and when each printing layer is completed, the forming substrate sinks by the height of one printing layer. In order to realize the lifting function of the forming substrate, the substrate driving device comprises a lifting plate block for bearing the forming substrate and a driver for driving the lifting plate block to move up and down, wherein the lifting plate block is positioned in the powder forming cavity, the shape of the lifting plate block is matched with that of the powder forming cavity, and thus the forming substrate synchronously lifts along with the lifting plate block. In addition, the driver rotates along with the rotation of the fixed shaft of the rotary printing table, so that the driver can drive the lifting plate to move up and down in the process of the rotation of the fixed shaft of the rotary printing table. The powder supply bin is arranged on the mounting frame and is kept in a relatively fixed state with the mounting frame; the powder supply bin is located above the rotary printing table, and when the printing reference platform is located below the powder supply bin, the powder supply bin can release powder stored by the powder supply bin to the printing reference platform. The laser device is arranged on the mounting frame and is kept in a relatively fixed state with the mounting frame; the laser device is positioned above the rotary printing table, and when the molded substrate on which the powder is paved is positioned below the laser device, the laser device projects a light beam onto the molded substrate to sinter and mold the powder. The scraper mounting frame of shop's powder mechanism is located the mounting frame, makes the doctor blade be in relative fixed state for the mounting frame, and the doctor blade is located and prints the top of solid of revolution gyration printing table and radially extend of solid of revolution gyration printing table, can evenly tile the powder on the printing reference platform in the shaping base plate like this. After the powder tiling operation is completed, the powder scraping knife pushes redundant powder into the powder recovery cavity in a proper way. Furthermore, there is a need for an exceptionally emphasized innovation: in the whole 3D printing process, the rotary printing table is always in a uniform rotation state; every time the doctor blade passes over the powder recovery cavity, the substrate driving device enables the forming substrate to be settled by the height of one printing layer. Therefore, the rotary 3D printing system can synchronously and continuously carry out powder paving operation and laser scanning sintering operation, and the rotary printing table rotates relative to the fixed shaft of the powder paving mechanism, so that the powder paving uniformity of the powder paving mechanism is good, the total powder paving time is short, and the 3D printing efficiency is greatly improved.
Drawings
FIG. 1 shows a powder release diagram of a rotary 3D printing system of the present invention;
FIG. 2 is a top view of the rotary 3D printing system of FIG. 1;
FIG. 3 shows a powder lay-up print of the rotary 3D printing system of the present invention;
FIG. 4 is a top view of the rotary 3D printing system of FIG. 3;
fig. 5 shows a schematic view of a rotary printing table, a powder forming chamber and a powder recycling chamber.
Description of element reference numerals
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the invention, which is defined by the appended claims, but rather by the claims, unless otherwise indicated, and unless otherwise indicated, all changes in structure, proportions, or otherwise, used by those skilled in the art, are included in the spirit and scope of the invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
As shown in fig. 1, 2, 3 and 4, the present invention provides a rotary 3D printing system, including:
a mounting frame;
the rotary printing table 1 is fixedly and rotatably arranged on the mounting frame, and the top end surface of the rotary printing table 1 forms a printing reference platform 11;
a powder forming cavity 2, wherein the powder forming cavity 2 is arranged on a printing reference platform 11, and the powder forming cavity 2 extends along the circumferential arc line of the rotary printing table 1;
the powder recovery cavity 3 is formed in the printing reference platform 11, and the powder recovery cavity 3 and the powder forming cavity 2 are adjacently arranged along the circumferential direction of the rotary printing table 1;
the liftable forming substrate 4 is positioned in the powder forming cavity 2 and extends along the circumferential arc of the rotary printing table 1, and the forming substrate 4 is used for bearing products;
the substrate driving device 5, the substrate driving device 5 comprises a lifting plate 51 for bearing the forming substrate 4 and a driver 52 for driving the lifting plate 51 to move up and down, the lifting plate 51 is positioned in the powder forming cavity 2, the shape of the lifting plate 51 is matched with the shape of the powder forming cavity 2, and the driver 52 rotates along with the fixed shaft rotation of the rotary printing table 1;
the powder supply bin 6 is arranged on the mounting frame and is positioned above the rotary printing table 1 so as to release the powder stored by the powder supply bin 6 onto the printing reference platform 11;
the laser device 7 is arranged on the mounting frame and is positioned above the rotary printing table 1 to project a light beam onto the forming substrate 4;
the powder spreading mechanism 8, the powder spreading mechanism 8 comprises a scraper mounting frame 81 and a powder scraping knife 82, the scraper mounting frame 81 is arranged on the mounting frame, the powder scraping knife 82 is arranged on the scraper mounting frame 81, the powder scraping knife 82 is located above the rotary printing table 1 and extends along the radial direction of the rotary printing table 1, and the powder scraping knife 82 is used for scraping off powder on the forming substrate 4 and pushing redundant powder into the powder recycling cavity 3.
In the present invention, the mounting frame (not shown) is a mounting, layout and load-bearing structure of the rotary 3D printing system, and provides mounting positions for components and mechanisms of the rotary 3D printing system other than the mounting frame. The rotary printing table 1 is generally cylindrical and is pivotable relative to the mounting frame. Because the powder forming cavity 2 and the powder recycling cavity 3 are both arranged on the printing reference platform 11, when the rotary printing table 1 rotates in a fixed shaft manner, the powder forming cavity 2 and the powder recycling cavity 3 rotate along with the rotary printing table 1. The forming substrate 4 is located in the powder forming cavity 2 and extends in an arc along the circumference of the rotary printing table 1, and when each printing layer is completed, the forming substrate 4 sinks by the height of one printing layer. In order to realize the lifting function of the molding substrate 4, the substrate driving device 5 includes a lifting plate 51 for carrying the molding substrate 4 and a driver 52 for driving the lifting plate 51 to move up and down, the lifting plate 51 is located in the powder molding cavity 2, and the shape of the lifting plate 51 is adapted to the shape of the powder molding cavity 2, so that the molding substrate 4 is lifted synchronously with the lifting plate 51. In addition, the driver 52 rotates with the fixed axis rotation of the rotary printing table 1, so that the driver 52 can drive the lifting plate 51 to move up and down during the fixed axis rotation of the rotary printing table 1. The powder supply bin 6 is arranged on the mounting frame and is kept in a relatively fixed state with the mounting frame; the powder supply bin 6 is located above the rotary printing table 1, and when the printing reference platform 11 is located below the powder supply bin 6, the powder supply bin 6 can release powder stored by itself onto the printing reference platform 11. The laser device 7 (such as a laser scanning galvanometer) is arranged on the mounting frame and keeps a relatively fixed state with the mounting frame; the laser device 7 is located above the rotary printing table 1, and when the molded substrate 4 on which the powder has been spread is located below the laser device 7, the laser device 7 projects a beam onto the molded substrate 4 to sinter the powder. The scraper mounting frame 81 of the powder spreading mechanism 8 is arranged on the mounting frame, so that the powder scraping knife 82 is in a relatively fixed state relative to the mounting frame, the powder scraping knife 82 is positioned above the printing rotary body rotary printing table 1 and extends along the radial direction of the printing rotary body rotary printing table 1, and powder on the printing reference platform 11 can be uniformly spread on the forming substrate 4. When the powder spreading operation is completed, the doctor blade 82 pushes the surplus powder into the powder recovery chamber 3. Furthermore, there is a need for an exceptionally emphasized innovation: in the whole 3D printing process, the rotary printing table 1 is always in a uniform rotation state; the substrate driving device 5 settles the molded substrate 4 by the height of one print layer every time the doctor blade 82 passes over the powder recovery chamber 3.
Therefore, the rotary 3D printing system can synchronously and continuously carry out powder paving operation and laser scanning sintering operation, and the rotary printing table 1 rotates relative to the powder paving mechanism 8 in a fixed shaft manner, so that the powder paving uniformity of the powder paving mechanism 8 is good, the total powder paving time is short, and the 3D printing efficiency is greatly improved.
In order to simplify the structure of the doctor mounting frame 81, the doctor mounting frame 81 includes a support column 811 and a cantilever 812 to which the doctor blade 82 is attached, the support column 811 is provided to be in a gap penetrating through the center of the rotary printing table 1 and to be provided to the mounting frame, and the cantilever 812 is provided to the support column 811.
Further, in order to set the doctor blade 82 in an overhead state, the cantilever 812 extends straight in the radial direction of the rotary printing table 1, and the radially inner end of the cantilever 812 is fixed to the support column 811.
In order to allow the simultaneous and continuous operation of laying powder and laser scanning sintering, the projection position of the laser device 7 on the molding substrate 4 is referred to as an irradiation position, the projection position of the powder supply bin 6 on the molding substrate 4 is referred to as a powder falling position, and the projection position of the doctor blade 82 on the molding substrate 4 is referred to as a powder scraping position, and the powder falling position, the powder scraping position, and the irradiation position are sequentially arranged along the rotation direction of the rotary printing table 1. Although the start time point of the powder spreading operation is earlier than the start time point of the laser scanning sintering operation, the end time point of the powder spreading operation is earlier than the end time point of the laser scanning sintering operation, there is an overlap period between the total time of the powder spreading operation and the total time of the laser scanning sintering operation, the percentage of the overlap period with respect to the total time of the powder spreading operation is large, and the percentage of the overlap period with respect to the total time of the laser scanning sintering operation is also large.
In order to precisely control the up-and-down movement of the lifting plate 51, the driver 52 includes a servo motor 521 fixedly connected to the rotary printing table 1, and a screw 522 drivingly connected to the servo motor 521, and the screw 522 is threaded through the lifting plate 51. Referring specifically to the above-mentioned rotary printing table 1, a through hole 14 is formed, and the through hole 14 is used for avoiding the screw 522. At this time, the lifting plate 51 corresponds to a nut structure of a nut screw mechanism, and the screw 522 corresponds to a screw structure of a nut screw mechanism.
For automatic control of powder releasing operation, the powder supply bin 6 comprises a storage container, a powder outlet is formed in the bottom of the storage container, and a switch valve is arranged on the powder outlet. The switch valve is in communication connection with the industrial personal computer of the rotary 3D printing system.
In order to control the release amount of the powder, the cross section of the storage container is gradually reduced from top to bottom. Specifically, the powder outlet is in a flat hole shape, and the length direction of the powder outlet is parallel to the radial direction of the rotary printing table 1.
In order to prolong the overlapping time period between the powder spreading operation and the laser scanning sintering operation, the powder forming cavity 2 is in a sector shape, and the angle corresponding to the arc extending track of the powder forming cavity 2 is larger than 180 degrees. In addition, the powder recovery cavity 3 is also fan-shaped, and the angle corresponding to the arc-shaped extending track of the powder recovery cavity 3 is not more than 45 degrees.
In order to avoid powder falling from the rotary printing table 1 during the powder spreading process by the doctor blade 82, the top end surface of the rotary printing table 1 has an outer convex edge 12 and an inner convex edge 13 which are concentrically arranged, and the outer convex edge 12 and the inner convex edge 13 define the print reference table 11 in a circular ring shape.
The invention also provides a printing method adopting the rotary 3D printing system, which comprises the following steps:
the powder supply bin 6 releases the powder stored by the powder supply bin to the printing reference platform 11 according to the preset throwing amount;
the rotary printing table 1 starts to rotate according to a preset rotation direction, and in the rotation process, the powder scraping knife 82 spreads the powder on the upper surface of the molding substrate 4;
when the molded substrate 4 with the powder spread thereon rotates below the laser device 7, the laser device 7 starts scanning and sintering the powder;
when the doctor blade 82 is located above the powder recovery chamber 3 after passing through the powder forming chamber 2, the doctor blade 82 pushes the surplus powder into the powder recovery chamber 3; at the same time, the driver 52 drives the lifting plate 51 to descend by one printing layer, the forming substrate 4 moves synchronously with the lifting plate 51, then the powder supply bin 6 releases powder for the second time, and the rotary 3D printing system enters the printing operation process of the second layer, and the process is circulated until the product is formed.
According to the printing method disclosed by the invention, the powder spreading operation and the laser scanning sintering operation can be synchronously and continuously carried out, and the rotary printing table 1 rotates relative to the fixed shaft of the powder spreading mechanism 8, so that the powder spreading uniformity of the powder spreading mechanism 8 is good, the total powder spreading time is short, and the 3D printing efficiency is greatly improved.
In summary, according to the rotary 3D printing system and the printing method, the powder laying operation and the laser scanning sintering operation can be synchronously and continuously performed, so that the powder laying uniformity of the powder laying mechanism is good, the total powder laying time is short, and the 3D printing efficiency is greatly improved. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A rotary 3D printing system, comprising:
a mounting frame;
the rotary printing table (1) is fixedly arranged on the mounting frame in a rotating way, and the top end surface of the rotary printing table (1) forms a printing reference platform (11);
the powder forming cavity (2), the powder forming cavity (2) is arranged on the printing reference platform (11), and the powder forming cavity (2) extends along the circumferential arc line of the rotary printing table (1);
the powder recovery cavity (3), the powder recovery cavity (3) is arranged on the printing reference platform (11), and the powder recovery cavity (3) and the powder forming cavity (2) are adjacently arranged along the circumferential direction of the rotary printing table (1);
the molding substrate (4) can be lifted, the molding substrate (4) is positioned in the powder molding cavity (2) and extends along the circumferential arc of the rotary printing table (1), and the molding substrate (4) is used for bearing products;
the substrate driving device (5), the substrate driving device (5) comprises a lifting plate (51) for bearing the forming substrate (4) and a driver (52) for driving the lifting plate (51) to move up and down, the lifting plate (51) is positioned in the powder forming cavity (2), the shape of the lifting plate (51) is matched with the shape of the powder forming cavity (2), and the driver (52) rotates along with the fixed shaft rotation of the rotary printing table (1);
the powder supply bin (6), the powder supply bin (6) is arranged on the mounting frame and is positioned above the rotary printing table (1) to release the powder stored by the powder supply bin to the printing reference platform (11);
the laser device (7) is arranged on the mounting frame and is positioned above the rotary printing table (1) so as to project light beams onto the forming substrate (4);
spread powder mechanism (8), spread powder mechanism (8) including scraper mounting bracket (81) and scrape powder sword (82), scraper mounting bracket (81) are located, scrape powder sword (82) and locate scraper mounting bracket (81), scrape powder sword (82) and be located the top of gyration printing table (1) and follow the radial extension of gyration printing table (1), scrape powder sword (82) and be used for strickleing the powder on forming substrate (4) and push unnecessary powder into powder recovery chamber (3).
2. The rotary 3D printing system of claim 1, wherein: the scraper mounting frame (81) comprises a supporting column (811) and a cantilever rod (812) for mounting the scraper knife (82), the supporting column (811) is arranged in the center of the rotary printing table (1) in a penetrating mode and is arranged in the mounting frame, and the cantilever rod (812) is arranged on the supporting column (811).
3. The rotary 3D printing system of claim 2, wherein: the cantilever rod (812) extends along the radial direction of the rotary printing table (1) in a straight line, and the radial inner end of the cantilever rod (812) is fixed on the support column (811).
4. The rotary 3D printing system of claim 1, wherein: the projection position of the laser device (7) on the forming substrate (4) is marked as an irradiation position, the projection position of the powder supply bin (6) on the forming substrate (4) is marked as a powder falling position, the projection position of the powder scraping knife (82) on the forming substrate (4) is marked as a powder scraping position, and the powder falling position, the powder scraping position and the irradiation position are sequentially arranged along the rotating direction of the rotary printing table (1).
5. The rotary 3D printing system of claim 1, wherein: the driver (52) comprises a servo motor (521) fixedly connected with the rotary printing table (1) and a screw rod (522) in transmission connection with the servo motor (521), and the screw rod (522) is threaded through the lifting plate (51).
6. The rotary 3D printing system of claim 1, wherein: the powder supply bin (6) comprises a storage container, a powder outlet is formed in the bottom of the storage container, and a switch valve is arranged on the powder outlet.
7. The rotary 3D printing system of claim 6, wherein: the cross section of the storage container gradually becomes smaller from top to bottom.
8. The rotary 3D printing system of claim 1, wherein: the powder forming cavity (2) is fan-shaped, and the angle corresponding to the arc-shaped extending track of the powder forming cavity (2) is larger than 180 degrees.
9. The rotary 3D printing system of claim 1, wherein: the top end surface of the rotary printing table (1) is provided with an outer convex edge (12) and an inner convex edge (13) which are concentrically arranged, and the outer convex edge (12) and the inner convex edge (13) jointly limit the printing reference table (11) into a circular ring shape.
10. A printing method employing the rotary 3D printing system according to any one of claims 1 to 9, comprising the steps of:
the powder supply bin (6) releases the powder stored by the powder supply bin to the printing reference platform (11) according to the preset throwing amount;
the rotary printing table (1) starts to rotate according to a preset rotation direction, and in the rotation process, the powder scraping knife (82) spreads powder on the upper surface of the forming substrate (4);
when the forming substrate (4) paved with the powder rotates to the lower part of the laser device (7), the laser device (7) starts scanning and sintering the powder;
when the doctor blade (82) is positioned above the powder recovery cavity (3) after passing through the powder forming cavity (2), the doctor blade (82) pushes excessive powder into the powder recovery cavity (3); meanwhile, the driver (52) drives the lifting plate (51) to descend one printing layer, the forming substrate (4) moves synchronously with the lifting plate (51), then the powder supply bin (6) releases powder for the second time, and the rotary 3D printing system enters the printing operation process of the second layer, and the process is circulated until the product is formed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022114684580 | 2022-11-22 | ||
| CN202211468458.0A CN115847810A (en) | 2022-11-22 | 2022-11-22 | Rotary 3D printing system and printing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116766585A true CN116766585A (en) | 2023-09-19 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211468458.0A Withdrawn CN115847810A (en) | 2022-11-22 | 2022-11-22 | Rotary 3D printing system and printing method |
| CN202310976180.6A Pending CN116766585A (en) | 2022-11-22 | 2023-08-03 | Rotary 3D printing system and printing method |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211468458.0A Withdrawn CN115847810A (en) | 2022-11-22 | 2022-11-22 | Rotary 3D printing system and printing method |
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| CN (2) | CN115847810A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117532874A (en) * | 2023-11-10 | 2024-02-09 | 东北林业大学 | Rotatory continuous printing formula SLS 3D printer structure |
-
2022
- 2022-11-22 CN CN202211468458.0A patent/CN115847810A/en not_active Withdrawn
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2023
- 2023-08-03 CN CN202310976180.6A patent/CN116766585A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117532874A (en) * | 2023-11-10 | 2024-02-09 | 东北林业大学 | Rotatory continuous printing formula SLS 3D printer structure |
| CN117532874B (en) * | 2023-11-10 | 2024-05-07 | 东北林业大学 | Rotatory continuous printing formula SLS 3D printer structure |
Also Published As
| Publication number | Publication date |
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| CN115847810A (en) | 2023-03-28 |
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