# US 2025/0083384 A1 · Liquefier nozzle for an additive manufacturing system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0083384 A1 - Document ID: US20250083384A1 - Status: Published application - Kind: A1 - Application number: 18/956,478 - Filed: 2024-11-22 - Published: 2025-03-13 - Earliest claimed: 2021-05-19 - Assignees: E3D-Online Limited - Applicants: E3D-Online Limited - Inventors: Mike Sherlock; Dylan Roberts; Rory Yonge; Sam Theobold; Andy Everitt; John Connor LeClaire - Web page: https://patentgrep.com/patent/US20250083384A1 ## CPC - B29C 64/209: Heads; Nozzles - B29C 64/295: Heating elements - B33Y 10/00: Processes of additive manufacturing - B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor - B29C 64/118: using filamentary material being melted, e.g. fused deposition modelling [FDM] - 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 The invention relates to a liquefier nozzle (100) for an additive manufacturing system, which includes a body (110,111,112) within which is received one or more inserts. One type of insert is a wear resistant tip insert (106) press-fit into the body. Another type is a heat transfer insert (10) either press-fit into an upstream end of the body or captivated within the body by the wear resistant tip insert (106). Yet another type is a press-fit tip insert that incorporates a heat transfer element. ## Claims ### Claim at position 1 -25. (canceled) ### Claim 26 A nozzle for an extrusion-based additive manufacturing system, the nozzle comprising: a body describing a filament passageway having an inlet for receiving a solid filament of build material and an outlet through which molten build material exits the nozzle; one or more heat transfer elements projecting into the filament passageway for transferring heat from the body toward a central portion of a build material advancing through the filament passageway; and a liquefier tube secured to an upstream end of the body. ### Claim 27 (depends on 26) The nozzle of claim 26, wherein the liquefier tube is received in an interference fit within the upstream end of the body. ### Claim 28 (depends on 27) The nozzle of claim 27, comprising a heat transfer insert within the body which includes the one or more heat transfer elements, the body comprises a shoulder upstream of the outlet and the insert abuts the shoulder. ### Claim 29 (depends on 28) The nozzle of claim 28, comprising a tip insert press-fit within a head of the body which includes the shoulder, wherein the heat transfer insert is captivated between the tip insert and the liquefier tube. ### Claim 30 (depends on 28) The nozzle of claim 28, wherein the one or more heat transfer elements comprise a fin extending along the filament passageway. ### Claim 31 (depends on 26) The nozzle of claim 26, wherein the one or more heat transfer elements comprise one or more fins extending along the filament passageway. ### Claim 32 (depends on 31) The nozzle of claim 31, wherein the one or more fins comprise a plurality of fins spaced evenly about the periphery of the filament passageway. ### Claim 33 (depends on 26) The nozzle of claim 26, wherein the or each heat transfer element intersects a central region of the filament passageway. ### Claim 34 A nozzle for an extrusion-based additive manufacturing system, the nozzle comprising: a body; a filament passageway having an inlet at an upstream end of the nozzle for receiving a solid filament of build material and an outlet at a downstream end of the nozzle through which molten build material exits the nozzle; a heat transfer insert within the body for transferring heat from the body toward a central portion of a build material advancing through the filament passageway; and a liquefier tube received within the upstream end of the body. ### Claim 35 (depends on 34) The nozzle of claim 34, wherein the body comprises a shoulder upstream of the outlet and the insert abuts the shoulder and is captivated between the shoulder and the liquefier tube. ### Claim 36 (depends on 35) The nozzle of claim 35, wherein the heat transfer insert comprises one or more fins extending along the filament passageway. ### Claim 37 (depends on 36) The nozzle of claim 36, wherein the or each fin intersects a central region of the filament passageway. ### Claim 38 (depends on 36) The nozzle of claim 36, wherein the one or more fins are in direct contact with the body. ### Claim 39 (depends on 38) The nozzle of claim 38, wherein the one or more fins comprises a plurality of fins spaced evenly about the periphery of the filament passageway. ### Claim 40 A nozzle for an extrusion-based additive manufacturing system, the nozzle comprising: a body; a filament passageway having an inlet at an upstream end of the nozzle for receiving a solid filament of build material and an outlet at a downstream end of the nozzle through which molten build material exits the nozzle; a heat transfer insert within the body and including one or more heat transfer fins projecting into the filament passageway for transferring heat from the body into a central portion of a build material advancing through the filament passageway; and a liquefier tube received within the upstream end of the body. ### Claim 41 (depends on 40) The nozzle of claim 40, wherein the or each heat transfer fin intersects a central region of the filament passageway. ### Claim 42 (depends on 40) The nozzle of claim 40, wherein the body comprises a shoulder upstream of the outlet and the insert abuts the shoulder. ### Claim 43 (depends on 42) The nozzle of claim 42, comprising a tip insert press-fit within a head of the body which includes the shoulder, wherein the heat transfer insert is captivated between the tip insert and the liquefier tube. ### Claim 44 (depends on 40) The nozzle of claim 40, wherein the one or more fins are in direct contact with the body. ### Claim 45 (depends on 44) The nozzle of claim 44, wherein the one or more fins comprises a plurality of fins spaced evenly about the periphery of the filament passageway.