Abstract:
An automated support cleaning system (10) comprising a tank (20) disposed within a housing (12, 14) and configured to circulate an aqueous cleaning solution to remove a support structure from a three-dimensional model.
Abstract:
A ribbon liquefier (38) comprising an outer liquefier portion (66) configured to receive thermal energy from a heat transfer component (40), and a channel (72) at least partially defined by the outer liquefier portion (66), where the channel (72) has dimensions that are configured to receive a ribbon filament (44), and where the ribbon liquefier (38) is configured to melt the ribbon filament (44) received in the channel (72) to at least an extrudable state with the received thermal energy to provide a melt flow. The dimensions of the channel (72) are further configured to conform the melt flow from an axially- asymmetric flow to a substantially axially-symmetric flow in an extrusion tip (52) connected to the ribbon liquefier (38).
Abstract:
A consumable assembly (18, 118, 218, 318) comprising a container portion (34, 134, 234, 334) configured to retain a supply of filament (386), a guide tube (36, 136, 236, 336) connected to the container portion (34, 134, 234, 334), and a pump portion (38, 138, 238, 338) connected to the guide tube (36, 136, 236, 336).
Abstract:
A method for printing a three-dimensional part (20) with an additive manufacturing system (10), the method including printing layers of the three-dimensional part (20) and of a support structure (22) for the three-dimensional part (20) from multiple print heads (18) or deposition lines, and switching the print heads (18) or deposition line between stand-by modes and operating modes in-between the printing of the layers of the three-dimensional part (20) and the support structure (22). The method also includes performing a purge operation for each print head (18) or deposition line switched to the operating mode, where the purge operation includes printing a layer of at least one purge tower (24) from the print head (18) or deposition line switched to the operating mode.
Abstract:
A print head assembly (43) that includes a print head carriage (18) and multiple, replaceable print heads (36, 42) that are configured to be removably retained in receptacles (46, 48) of the print head carriage (18). The print heads (36, 42) each include a cartridge assembly (60, 64) and a liquefier pump assembly (64, 66) retained by the cartridge assembly (60, 64).
Abstract:
A liquefier assembly (62, 162, 262, 362, 462, 562, 662) for use in an extrusion-based additive manufacturing system (10), the liquefier assembly (62, 162, 262, 362, 462, 562, 662) comprising a downstream portion (62b, 162b, 262b, 362b, 462b, 562b, 662b) having a first average inner cross-sectional area, and an upstream portion (62a, 162a, 262a, 362a, 462a, 562a, 662a) having a second average inner cross-sectional area that is less than the first inner cross-sectional area, the upstream portion (62a, 162a, 262a, 362a, 462a, 562a, 662a) defining a shoulder (88, 188, 288, 388, 488, 588, 688) configured to restrict movement of a melt meniscus (94, 194, 294, 394, 494, 594, 694) of a consumable material (90, 190, 290, 390, 490, 590, 690).
Abstract:
A filament drive mechanism (22, 122, 222, 322, 422, 500) comprising a rotatable component (36, 136, 236, 336, 436, 532) comprising a central hole (46, 146, 346, 446, 546) defined at least in part by an internally-threaded surface (48, 148, 348, 448, 548), and is configured to receive a filament strand (24) through the central hole (46, 146, 346, 446, 546) to engage the internally-threaded surface (48, 148, 348, 448, 548) with the filament strand (24). The filament drive mechanism (22, 122, 222, 322, 422, 500) further comprises at least one rotation mechanism (534) configured to rotate the rotatable component (36, 136, 236, 336, 436, 532), thereby allowing the engaged internally-threaded surface (48, 148, 348, 448, 548) to drive the filament strand (24) through the central hole (46, 146, 346, 446, 546) of the rotatable component (36, 136, 236, 336, 436, 532).
Abstract:
An additive manufacturing system (10) includes a build chamber with at least first and second side walls and top and bottom walls. A central deformable, thermal insulator (30) has a first edge (32) and a second edge (33), where a print head carriage (31) is movably retained within the central deformable thermal insulator (30) and is configured to move print heads (204, 206) within a build plane of the build chamber under control of a gantry. The system (10) includes first and second dynamic thermal barriers (12, 14) each having a length between a proximal edge (16, 116) and a distal edge (18, 118) wherein the proximal edge (16, 116) is configured to be secured to the central deformable insulator (30) and a distal edge (18, 118) is configured to be movably retained to the build chamber such that as the print head carriage (31) moves laterally across the build plane, each dynamic thermal barrier (12, 14) moves with the central deformable insulator (30) and print head carriage (31), and retains its length.
Abstract:
A liquefier assembly (20) for use in an additive manufacturing system (10) to print three-dimensional parts (12). In one aspect, the liquefier assembly (20) includes a liquefier (52) that is transversely compressible, and having an inlet end (64) configured to receive a consumable material (48) in a solid or molten state and an outlet end (66), a nozzle (56) at the outlet end, and an actuator mechanism (62) configured to transversely compress and expand the liquefier (52) in a controlled manner. In another aspect, the liquefier assembly (20) is self heating.
Abstract:
A liquefier assembly (22, 322) comprising a liquefier tube (32, 123, 232, 332), where the liquefier tube (32, 123, 232, 332) comprises a sidewall (38, 138, 238, 338) having an inlet opening (40, 140, 240, 340) configured to receive a filament strand (24), an outlet opening (52), and a port (56, 156, 256) disposed through the sidewall (38, 138, 238, 338) at a location between the inlet opening (40, 140, 240, 340) and the outlet opening (52), the port (56, 156, 256) being configured to provide access for a filament drive mechanism (30) to engage with the received filament strand (24). The liquefier assembly (22, 322) further comprises a heat transfer component (34, 334) configured to generate a thermal gradient along a longitudinal length of the sidewall (38, 138, 238, 338) between the port (56, 156, 256) and the outlet opening (52).