Various implementations include a three-dimensional printing device. The device includes a primary extruder, a secondary extruder, and a build plate. The primary extruder has a hollow primary body for accepting a printing material. An end of the primary body defines a primary extruder opening shaped to extrude a primary extrusion of melted printing material. The secondary extruder has a hollow secondary body for accepting a printing material. An end of the secondary body defines a secondary extruder opening shaped to extrude a secondary extrusion of melted printing material. A first primary extrusion extruded from the primary extruder disposed side by side with a second primary extrusion extruded from the primary extruder adjacent the build plate in a first layer defines a gap between adjacent edges of the first and second primary extrusions. A first secondary extrusion extruded from the secondary extruder is disposable in a second layer in the gap.

A three-dimensional shaped object using a plurality of materials can be shaped, and replenishment of the materials is implemented during shaping without stopping an apparatus. A three-dimensional laminating and shaping apparatus includes a shaping chamber in which a three-dimensional laminated and shaped object is shaped, at least two material spreaders that are provided in the shaping chamber and spread materials of the three-dimensional laminated and shaped object, at least two material suppliers that supply the materials to the material spreaders, a controller that controls movements of the material spreaders and the material suppliers, and a beam irradiator that irradiates the materials with a beam. The material spreaders and the material suppliers are respectively paired, and the controller controls the movements of the material spreaders and the material suppliers so that each of the material spreaders is supplied, at a predetermined timing, with the material from a paired one of the material suppliers.

Disclosed herein are embodiments of a composition that can be used to make liquid crystalline networks using thiol-ene-based polymerization. In particular embodiments, the liquid crystalline networks can be formed by using the composition embodiments in additive manufacturing methods. The composition comprises a monomer, chain extender compound, and a crosslinker compound and each of these components can be selected so as to influence the thermomechanical and shape memory properties of the liquid crystalline networks and/or objects formed therewith.

Disclosed herein are embodiments of a composition that can be used to make liquid crystalline networks using thiol-ene-based polymerization. In particular embodiments, the liquid crystalline networks can be formed by using the composition embodiments in additive manufacturing methods. The composition comprises a monomer, chain extender compound, and a crosslinker compound and each of these components can be selected so as to influence the thermomechanical and shape memory properties of the liquid crystalline networks and/or objects formed therewith.

In one example, an additive manufacturing process includes: making an object slice by slice, including dispensing a first quantity of each of multiple liquid functional agents on to a layer of fusable build material and then irradiating the layer of build material; while making the object, identifying a deviant region in a slice; and dispensing a second quantity different from the first quantity of at least one of the functional agents into a location corresponding to the deviant region.

A computer system (110) for part production using additive design receives a computer-aided design (CAD) file that describes physical dimensions of a target object (120). The computer system (110) identifies a physical boundary portion (300) of the target object within the CAD file. The computer system determines a target flow rate to infill the physical boundary portion (300) with the infill material. Additionally, the computer system (110) generates a first tool path to flow infill material into the physical boundary portion (300). Further, the computer system (110) sends instructions to a computer system in communication with a dispenser (100) that cause the dispenser to implement the first tool path while flowing the infill material into the physical boundary portion (300).

A computer system (110) for part production using additive design receives a computer-aided design (CAD) file that describes physical dimensions of a target object (120). The computer system (110) identifies a physical boundary portion (300) of the target object within the CAD file. The computer system determines a target flow rate to infill the physical boundary portion (300) with the infill material. Additionally, the computer system (110) generates a first tool path to flow infill material into the physical boundary portion (300). Further, the computer system (110) sends instructions to a computer system in communication with a dispenser (100) that cause the dispenser to implement the first tool path while flowing the infill material into the physical boundary portion (300).

An apparatus for the manufacture of an object, the apparatus having a print bed, a stencil, a heater arranged to heat the stencil, and a squeegee. The stencil comprises one or more apertures and is positionable over the print bed. The squeegee is movable to spread a printing material across the stencil and to thereby force printing material through the stencil aperture(s). One or both of the stencil and the print bed is movable to adjust the spacing between the stencil and the print bed.

A 3D object is additively formed via arranging non-conductive material relative to a receiving surface. During additive formation of the 3D object, a conductive channel is formed as part of the 3D object. In some instances, non-destructive fracture sensing is performed via measurement of an electrical parameter of the conductive channel.

A 3D object is additively formed via arranging non-conductive material relative to a receiving surface. During additive formation of the 3D object, a conductive channel is formed as part of the 3D object. In some instances, non-destructive fracture sensing is performed via measurement of an electrical parameter of the conductive channel.