# US 12,759,238 B2 · System for rapid object production using flow infill design > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,759,238 B2 - Document ID: US12759238B2 - Status: Granted - Kind: B2 - Application number: 18/003,934 - Filed: 2021-05-03 - Published: 2023-08-17 - Granted: 2026-10-13 - Earliest claimed: 2020-07-02 - Assignees: PPG Industries Ohio, Inc. - Applicants: PPG Industries Ohio, Inc. - Inventors: Cynthia Kutchko; Bryan William Wilkinson; Michael Anthony Bubas - Web page: https://patentgrep.com/patent/US12759238B2 ## CPC - B29C 64/393: for controlling or regulating additive manufacturing processes - B29C 64/209: Heads; Nozzles - B29K 2101/12: Thermoplastic materials - B33Y 10/00: Processes of additive manufacturing - B33Y 50/02: for controlling or regulating additive manufacturing processes - 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) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS - 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 computer system for part production using flow infill design receives a computer-aided design file that describes physical dimensions of a target object (120). The computer system identifies a physical boundary portion (300) of the target object within the CAD file. The computer system generates a first tool path to additively manufacture the physical boundary portion (300). Additionally, the computer system sends instructions to a computer system in communication with a dispenser (130) that cause the dispenser to implement the first tool path while dispensing a boundary material. Further, the computer system generates a command to dispense the coreactive infill material (310) within the physical boundary portion. ## Claims ### Claim 1 A computer system for part production using flow infill design, comprising: one or more processors; and one or more computer-readable media having stored thereon executable instructions that when executed by the one or more processors configure the computer system to perform at least the following: receive a computer-aided design (CAD) file that describes physical dimensions of a target object; identify a physical boundary portion of the target object within the CAD file, wherein the physical boundary portion comprises a portion of the target object that is configured to enclose a coreactive infill material; generate a first tool path to additively manufacture the physical boundary portion, wherein a target flow rate is calculated which accounts for a reactive time of one or more coreactive materials; send instructions to a dispenser that cause the dispenser to implement the first tool path while dispensing a boundary material, wherein the instructions comprise dynamic adjustments along the first tool path to mix ratios of multiple coreactive materials based upon material properties of at least one of the multiple coreactive materials; and generate a command to dispense the coreactive infill material within the physical boundary portion, wherein generating the command to dispense the coreactive infill material comprises: identifying a particular set of coreactive materials to include within the infill material in order to create at least the following: covalent bonding between the physical boundary portion and the coreactive infill material, and specific performance attributes of the coreactive infill material, wherein the specific performance attributes of the coreactive infill material are not the same for the physical boundary portion. ### Claim 2 (depends on 1) The computer system of claim 1, wherein the executable instructions include instructions that are executable to configure the computer system to: generate the command to dispense the coreactive infill material within the physical boundary portion by generating a second tool path to additively manufacture an infill portion that is located at least partly within the physical boundary portion; and send instructions to the dispenser that cause the dispenser to implement the second tool path while flowing coreactive infill material to create the infill portion. ### Claim 3 (depends on 1) The computer system of claim 1, wherein the executable instructions include instructions that are executable to configure the computer system to: generate the command to dispense the coreactive infill material within the physical boundary portion by generating a second tool path to additively manufacture an infill portion that is located at least partly within the physical boundary portion; and send instructions to another dispenser that cause the other dispenser to implement the second tool path while flowing coreactive infill material to create the infill portion. ### Claim 4 (depends on 1) The computer system of claim 1, wherein the coreactive infill material and the boundary material comprise different ratios of the same coreactive materials. ### Claim 5 (depends on 1) The computer system of claim 1, wherein the coreactive infill material comprises a coreactive infill material and the boundary material comprises a thermoplastic. ### Claim 6 (depends on 1) The computer system of claim 1, wherein the command to dispense the coreactive infill material within the physical boundary portion comprises a command that is configured to cause a particular dispenser to pour the coreactive infill material within the physical boundary portion. ### Claim 7 (depends on 1) The computer system of claim 1, wherein the command to dispense the coreactive infill material within the physical boundary portion comprises a command that is configured to cause a user interface to display an indication to pour the coreactive infill material within the physical boundary portion. ### Claim 8 (depends on 1) The computer system of claim 1, wherein the computer system comprises a three-dimensional printer. ### Claim 9 A method for part production using flow infill design, comprising when executed by one or more processors: receiving a computer-aided design (CAD) file that describes physical dimensions of a target object; identifying a physical boundary portion of the target object within the CAD file, wherein the physical boundary portion comprises a portion of the target object that is configured to enclose a coreactive infill material; generating a first tool path to additively manufacture the physical boundary portion, wherein a target flow rate is calculated which accounts for a reactive time of one or more coreactive materials; sending instructions to a dispenser that cause the dispenser to implement the first tool path while dispensing a boundary material, wherein the instructions comprises dynamic adjustments along the first tool path to mix ratios of multiple coreactive materials based upon material properties of at least one of the multiple coreactive materials; and generating a command to dispense the coreactive infill material within the physical boundary portion, wherein generating the command to dispense the coreactive infill material comprises: identifying a particular set of coreactive materials to include within the infill material in order to create at least the following: covalent bonding between the physical boundary portion and the coreactive infill material, and specific performance attributes of the coreactive infill material, wherein the specific performance attributes of the coreactive infill material are not the same for the physical boundary portion. ### Claim 10 (depends on 9) The method as recited in claim 9, wherein the boundary material comprises a coreactive material. ### Claim 11 (depends on 9) The method as recited in claim 9, further comprising: generating the command to dispense the coreactive infill material within the physical boundary portion by generating a second tool path to additively manufacture an infill portion that is located at least partly within the physical boundary portion; and sending instructions to the dispenser that cause the dispenser to implement the second tool path while flowing coreactive infill material to create the infill portion. ### Claim 12 (depends on 9) The method as recited in claim 9, further comprising: generating the command to dispense the coreactive infill material within the physical boundary portion by generating a second tool path to additively manufacture an infill portion that is located at least partly within the physical boundary portion; and sending instructions to another dispenser that cause the other dispenser to implement the second tool path while flowing coreactive infill material to create the infill portion. ### Claim 13 (depends on 9) The method as recited in claim 9, wherein the coreactive infill material comprises a coreactive and the boundary material comprises a thermoplastic. ### Claim 14 (depends on 9) The method as recited in claim 9, wherein the command to dispense the coreactive infill material within the physical boundary portion comprises a command that is configured to cause a particular dispenser to pour the coreactive infill material within the physical boundary portion. ### Claim 15 (depends on 9) The method as recited in claim 9, wherein the command to dispense the coreactive infill material within the physical boundary portion comprises a command that is configured to cause a user interface to display an indication to pour the coreactive infill material within the physical boundary portion. ### Claim 16 (depends on 9) The method as recited in claim 9, wherein a volume mix ratio of the mixture of the two different coreactive materials is varied while dispensing such that a gradient of the two different coreactive materials is created.