# US 2019/0171184 A1 · Three dimensional printing method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0171184 A1 - Document ID: US20190171184A1 - Status: Published application - Kind: A1 - Application number: 15/943,718 - Filed: 2018-04-03 - Published: 2019-06-06 - Earliest claimed: 2017-12-04 - Assignees: XYZprinting, Inc.; Kinpo Electronics, Inc. - Applicants: XYZprinting, Inc.; Kinpo Electronics, Inc. - Inventors: Tsai-Yi Lin; Chien-Te Lee; Chen-Fu Huang; An-Hsiu Lee - Web page: https://patentgrep.com/patent/US20190171184A1 ## CPC - G05B 19/4099: Surface or curve machining, making three-dimensional [3D] objects, e.g. desktop manufacturing - B29C 64/124: using layers of liquid which are selectively solidified - B29C 64/129: characterised by the energy source therefor, e.g. by global irradiation combined with a mask - B29C 64/393: for controlling or regulating additive manufacturing processes - B29C 64/241: for rotary motion - B33Y 10/00: Processes of additive manufacturing - B33Y 50/02: for controlling or regulating additive manufacturing processes - G05B 2219/49007: Making, forming 3-D object, model, surface - G05B 2219/49023: 3-D printing, layer of powder, add drops of binder in layer, new powder - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - 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 (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B33Y: 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 ## Abstract A 3D printing method adapted for a 3D printer is provided. The 3D printer includes a tank filled with a liquid-state forming material, a platform, a curing module and a control module. At least one of the tank and the platform as well as the curing module are electrically connected to the control module to be controlled by the same, and a 3D object is formed on the platform. The 3D printing method includes analyzing a model of the 3D object to obtain a layered information; the control module correspondingly distributes the layered information at a plurality of forming positions at the bottom of the tank. A forming layer is cured by the curing module and located at a forming position, and then the platform and the tank rotate relatively to move the forming layer to another forming position, and another forming layer is formed at the another forming position. ## Claims ### Claim 1 A three-dimensional (3D) printing method, adapted for a 3D printer, the 3D printer comprising a tank, a platform, a curing module and a control module, the tank filled with a liquid-state forming material, the control module electrically connected to the tank, the platform and the curing module respectively to perform control to form a 3D object on the platform, characterized in comprising: analyzing a model of the 3D object to obtain a layered information {Am}=A1, A2, A3, . . . , Ax of the 3D object, m and x being positive integers, and x≥2; the control module distributing the layered information at a plurality of forming positions {Pn}=P1, P2, P3, . . . , Py at a bottom of the tank, n and y being positive integers, and y≥2; and the control module driving the platform to be moved to the tank to contact the liquid-state forming material, and driving the curing module to cure the liquid-state forming material at a forming position (Pn), and after a forming layer (Am) being formed on the platform, the control module driving the tank to rotate relative to the platform, such that after the forming layer (Am) is removed from the forming position (Pn) and the forming layer (A1) corresponds to another forming position (Pn+1), the control module driving the curing module again to cure the liquid-state forming material at said another forming position (Pn+1) to form and stack another forming layer (Am+1) on the forming layer (Am) until the 3D object is completed. ### Claim 2 (depends on 1) The 3D printing method as claimed in claim 1, characterized in that the bottom of the tank is a transparent silicone material, the liquid-state forming material is a photopolymer, the curing module is a curing light for penetrating through the forming position {Pn} of the tank. ### Claim 3 (depends on 1) The 3D printing method as claimed in claim 1, characterized in that the plurality of forming positions {Pn} are deviated from a rotating axis of the tank. ### Claim 4 (depends on 1) The 3D printing method as claimed in claim 1, characterized in that a contour of an orthogonal projection of the forming layer (Am) at the bottom of the tank partially overlaps a contour of an orthogonal projection of said another forming layer (Am+1) at the bottom of the tank. ### Claim 5 (depends on 1) The 3D printing method as claimed in claim 1, characterized in further comprising: after the forming layer (Am) is completed, the control module driving the tank to rotate by an removing angle (θR) relative to the platform such that the forming layer (Am) is removed from the forming position (Pn); and the control module driving the tank again to rotate by a returning angle (θV) relative to the platform such that the forming layer (Am) is moved to said another forming position (Pn+1). ### Claim 6 (depends on 5) The 3D printing method as claimed in claim 5, characterized in that a direction of the removing angle (θR) by which the tank is rotated is opposite to a direction of the returning angle (θV), and θR≠θV. ### Claim 7 (depends on 5) The 3D printing method as claimed in claim 5, characterized in that a direction of the removing angle (θR) by which the tank is rotated is the same as a direction of the returning angle (θV), and θV≠u*(360°−θR), u is a positive integer. ### Claim 8 (depends on 1) The 3D printing method as claimed in claim 1, characterized in that a relative rotating angle (θh) is formed between the forming position (Pn) and said another forming position (Pn+1) in the tank, and the 3D printing method further comprising: providing another relative rotating angle (θ1) such that, after the forming layer (Az) is completed, the control module driving the tank by said another rotating angle (θt) to rotate relative to the platform, z=360°/(θh), and z