A 3D printing apparatus is disclosed herein. The apparatus comprises a container, a build material extraction module, an energy source and a controller. The container is to receive a build volume comprising portions in which an un-cured thermally curable binder has been applied to define a 3D object to be generated and portions on which no binder has been applied. The build material extraction module is to remove part of the build material on which no binder has been applied. The energy source to heat the contents of the container. And the controller is to control the build material extraction module to remove part of the build material on which no binder has been applied; and control the energy source to heat the build material to thermally cure any binder in the container.

An additive manufacturing apparatus includes a stage configured to hold a component. A radiant energy is device operable to generate and project radiant energy in a patterned image. An actuator is configured to change a position of the stage relative to the radiant energy device. A deposition assembly is upstream of the stage and configured to deposit a resin on a resin support. The deposition assembly includes a reservoir housing configured to retain a volume of resin between the upstream wall and the downstream wall. The deposition assembly also includes an application device operably coupled with the reservoir housing. A computing system is operably coupled with the application device. The computing system is configured to intermittently initiate a flush operation between successive layers of the component, wherein the application device is moved from a first position to a second position during the flush operation.

An additive manufacturing apparatus includes a stage configured to hold a component. A radiant energy is device operable to generate and project radiant energy in a patterned image. An actuator is configured to change a position of the stage relative to the radiant energy device. A deposition assembly is upstream of the stage and configured to deposit a resin on a resin support. The deposition assembly includes a reservoir housing configured to retain a volume of resin between the upstream wall and the downstream wall. The deposition assembly also includes an application device operably coupled with the reservoir housing. A computing system is operably coupled with the application device. The computing system is configured to intermittently initiate a flush operation between successive layers of the component, wherein the application device is moved from a first position to a second position during the flush operation.

A multi-material 3-D printing system and method including at least two printing heads each with a transparent window circumscribed by an ejection nozzle. Each ejection nozzle is coupled to a respective pump that pumps resin from a respective vat onto a respective window. The resin is cured from below the window by exposure to a digital image displayed by a micro display chip. To switch resins, the sample is moved across a plurality of suction nozzles towards a second printing head. A respective one of the suction heads is coupled to a vacuum that effectuates the intake of residual resin from the underside of the sample.

A multi-material 3-D printing system and method including at least two printing heads each with a transparent window circumscribed by an ejection nozzle. Each ejection nozzle is coupled to a respective pump that pumps resin from a respective vat onto a respective window. The resin is cured from below the window by exposure to a digital image displayed by a micro display chip. To switch resins, the sample is moved across a plurality of suction nozzles towards a second printing head. A respective one of the suction heads is coupled to a vacuum that effectuates the intake of residual resin from the underside of the sample.

Four dimensional (4D) energy-field package assembly for projecting energy fields according to a 4D coordinate function. The 4D energy-field package assembly includes an energy-source system having energy sources capable of providing energy to energy locations, and energy waveguides for directing energy from the energy locations from one side of the energy waveguide to another side of the energy waveguide along energy propagation paths.

Four dimensional (4D) energy-field package assembly for projecting energy fields according to a 4D coordinate function. The 4D energy-field package assembly includes an energy-source system having energy sources capable of providing energy to energy locations, and energy waveguides for directing energy from the energy locations from one side of the energy waveguide to another side of the energy waveguide along energy propagation paths.

Disclosed is a coater assembly 1 for a 3D printer, comprising a coater 3 having a container 5 which defines an inner cavity for receiving particulate construction material which opens into a container opening 7 for outputting the particulate construction material from the container 5, and an output region 9 which defines a coater output opening 11 for outputting the particulate construction material from the coater 3 onto a construction field. The container 5 is movable relative to the coater output opening 11 so that by moving the container 5 relative to the coater output opening a discharge of particulate construction material from the inner cavity through the container opening 7 and the coater output opening 11 onto the construction field is variable.

A system for fabricating an acoustic metamaterial is provided. In an embodiment, a system for fabricating an acoustic metamaterial includes determining at least one tuned physical property for each of a plurality of micro-resonators according to a desired acoustic property of the acoustic metamaterial. For a particular physical property, a value of the tuned physical property for at least one of the plurality of micro-resonators is different from a value of the tuned physical property for at least one other of the plurality of micro-resonators. The system also includes an additively manufacturing device configured to form the acoustic metamaterial such that the acoustic metamaterial comprises a first structure and the plurality of micro-resonators embedded within the first structure. Forming the acoustic metamaterial is performed such that an actual physical property of each of the plurality of micro-resonators is equal to a corresponding tuned physical property for each of the plurality of micro-resonators.

A system for fabricating an acoustic metamaterial is provided. In an embodiment, a system for fabricating an acoustic metamaterial includes determining at least one tuned physical property for each of a plurality of micro-resonators according to a desired acoustic property of the acoustic metamaterial. For a particular physical property, a value of the tuned physical property for at least one of the plurality of micro-resonators is different from a value of the tuned physical property for at least one other of the plurality of micro-resonators. The system also includes an additively manufacturing device configured to form the acoustic metamaterial such that the acoustic metamaterial comprises a first structure and the plurality of micro-resonators embedded within the first structure. Forming the acoustic metamaterial is performed such that an actual physical property of each of the plurality of micro-resonators is equal to a corresponding tuned physical property for each of the plurality of micro-resonators.