Abstract: A nozzle assembly comprising a housing, a nozzle disposed in the housing and connected to an ink supply part, a first coil, which is disposed in the housing, for generating a magnetic field when a power source is applied, a second coil disposed in the housing, disposed so as to surround the nozzle and the first coil and generating a magnetic field when a power source is applied, provided that at least one of the magnetic field effective area and the magnetic field intensity is different from that of the first coil, and a lift part for lifting the nozzle and the first and second coils, respectively, so as to be positioned in the housing or exposed to the outside of the housing.

Abstract: An additive manufacturing device utilizing an electron beam and laser integrated scanning comprises: a vacuum generating chamber (1); a worktable means having a forming region at least provided in the vacuum generating chamber (1); a powder supply means configured to supply a powder to the forming region; an electron-beam emission focusing and scanning means (6) and an laser-beam emission focusing and scanning means (7) configured in such a manner that a scanning range of the electron-beam emission focusing and scanning means (6) and a scanning range of the laser-beam emission focusing and scanning means (7) cover at least a part of the forming region; and a controller configured to control the electron-beam emission focusing and scanning means (6) and the laser-beam emission focusing and scanning means (7) to perform a powder integrated-scanning and forming treatment on the forming region.

Abstract: A movement system for achieving movement of at least a nozzle assembly in an additive manufacturing machine is provided. The movement system comprises a first tower and a belt assembly. The first tower is configured to move back and forth along a first axis. The belt assembly is configured to enable the back and forth movement of the first tower along the first axis. The belt assembly comprises a belt, a gear and at least two bearings. The belt interfaces with the gear and the two bearings, with one bearing on each side of the gear, such that the belt is sandwiched between the gear and the bearings. The belt is engaged to the first tower. Rotation of the gear results in movement of the belt, and thereby the first tower, along the first axis.

Abstract: A device for fabricating a three-dimensional part by selectively melting a powder bed, the device including a first tank for containing a first powder and provided with a first powder dispenser valve, a second tank for containing a second different powder and provided with a second powder dispenser valve, a first and a second monitoring device for monitoring the quantity of first powder delivered by the first valve and the quantity of second powder delivered by the second valve, a mixer chamber in communication with the first and second valves and including a third powder dispenser valve, and a mixer for mixing the powder particles in the chamber, a support for receiving the powder delivered by the third valve and on which the parts is to be fabricated, a powder spreader for spreading powder on the support, and a heater member for locally melting the powder spread on the support.

Abstract: Disclosed are processes for In-Mold coating of a substrate. The processes include: introducing a curable composition to a mixhead at a first elevated pressure, the curable composition comprising a first polymeric component and a second polymeric component, the introducing of the curable composition to the mixhead comprising mixing the first and second polymeric components by impingement to form an intermediate composition; introducing the intermediate composition to a secondary mixer, the introducing of the intermediate composition to the secondary mixer comprising mixing the intermediate composition to form a coating composition; and introducing the coating composition into a mold containing a substrate to form a curable coating on a surface of the substrate.

Abstract: According to an example, in a method, a radiation source that is to output radiation at a preset energy level onto a surface of a three-dimensional (3D) printed object may be activated. In addition, the radiation source may be deactivated after a predefined period of time sufficient to cause an outer portion of about a predetermined thickness of the surface of the 3D printed object to begin to melt to finish the surface of the 3D printed object.

Abstract: An apparatus and method for making a three-dimensional object from a solidifiable material using a linear solidification device is shown and described. The apparatus includes a solidification substrate that is tiltable relative to a film about a tilting axis. Layers of the solidifiable material solidify in contact with a film located between the most recently solidified object layer and a solidification substrate that comprises the solidification substrate assembly. The tilting of the solidification substrate relative to the film allows the substrate to be used to squeeze excess solidifiable material from between the film and the most recently solidified object surface while minimizing or eliminating the formation of bubbles in the solidifiable material which can prolong object build times.

Abstract: A method of fabricating a cross-layer pattern in a layered object is disclosed. The method is executed by an additive manufacturing system and comprises: dispensing a patterning material onto a receiving medium to form a first pattern element; dispensing a first layer of modeling material onto the first pattern element while forming a first open cavity exposing at least a portion of the first pattern element beneath the first layer; and dispensing patterning material onto the exposed portion of the first pattern element and the first layer to form a second pattern element contacting the first pattern element.

Abstract: Techniques for generating electronics components that operate free of unwanted distortions such as edge diffraction and unwanted phase jumps are described. A modified production master or a modified working stamp can be implemented to generate an electronic or optical component having structures that are positioned within a desired distance from a planar surface. A production master or a working stamp is modified in dependence upon a comparison of an identified distance for each respective structure to the planar surface and a desired distance. The modified production master or the modified working stamp generates the electronic or optical component by positioning the structures in accordance with the desired distance. By positioning the structures in accordance with the desired distance, electronic components generated using the modified production master or the modified working stamp minimize distortions, such as a phase jump between the structures.

Abstract: A method of manufacturing a patterned stamp (100) for patterning a contoured surface (10) is disclosed. The method comprises applying a layer (115) of a pliable material precursor over a master (50) carrying an inverse pattern (52) to form a desired pattern (112) in said layer; curing the pliable material precursor to form a pliable stamp layer (120) comprising said desired pattern; providing an intermediate stamp structure by adhering a porous pliable support layer (130) to the pliable stamp layer; releasing the intermediate stamp structure from the master; forcing the intermediate stamp structure onto the contoured surface with said pattern of features facing the contoured surface; forming the patterned stamp by filling the porous pliable support layer with a filler material to reduce the pliability of the support layer; and removing the patterned stamp from the contoured surface. A corresponding patterned stamp, imprinting method and imprinted article are also disclosed.

Abstract: Described herein is an additive manufacturing apparatus that is well-suited for constructing piezoelectric sensors. The additive manufacturing apparatus includes an extrusion nozzle formed of a conductive material such as aluminum. The extrusion nozzle has a channel by way of which printing material exits the extrusion nozzle, wherein a build plate is configured to receive the printing material responsive to the printing material exiting the extrusion nozzle. An arc suppressor formed of a semiconductor is coupled to the extrusion nozzle and is configured to dissipate excess charge that would otherwise exist on the extrusion nozzle when a relatively high bias voltage is applied to the extrusion nozzle. Thus, the arc suppressor mitigates arcing between the extrusion nozzle and the build plate. Arc suppressing gas is also optionally introduced into a printing region, thereby further mitigating arcing between the extrusion nozzle and the build plate.

Abstract: An apparatus (1) for optical inspection of a mass of polymeric material (2) passing through an extruder (3) having a hollow extrusion cylinder (4) extending elongately in a longitudinal direction comprises an optical sensor (8) which can be operatively coupled to the extrusion cylinder (4) and having an infrared light emitter (8a) and a receiver (8b) configured to measure a measurement parameter representing an optical property of the polymeric material (2) inside the extrusion cylinder (4) and is characterized in that it comprises a plurality of the optical sensors (8) which can be operatively coupled to the extrusion cylinder (4) in a plurality of measurement sites located in succession and spaced from each other along the longitudinal direction and a processor (9) programmed to acquire a plurality of measurement signals containing the measurement parameters measured by the corresponding optical sensors (8) and programmed to process the plurality of measurement signals in order to calculate a corresponding

Abstract: A preform conveying device (100) of the invention includes a control unit that detects an arriving time at which a conveyor jig arrives at a reference position based on an output of a first encoder, and commands a second motor to move a conveyor arm to a target position at regular intervals from the arriving time. The target position in each command is a position obtained by adding, to a current position of the conveyor jig which is obtained based on a latest output of the first encoder which was obtained when the command has been issued, a moving distance by which the conveyor jig has advanced during a delay time T which spans from a time when the latest output is outputted from the first encoder to a time when the command is received by the second motor.

Abstract: A support material for use in an additive manufacturing system to print a support structure for a three-dimensional part. The support material includes a base resin that is substantially miscible with a part material used to print the three-dimensional part, and has a glass transition temperature within about 10° C. of a glass transition temperature of the part material. The support material also includes a dispersed resin that is substantially immiscible with the base resin, where the base resin and the dispersed resin are each thermally stable for use in the additive manufacturing system in coordination with the part material.

Abstract: An additive manufacturing apparatus includes an energy beam source adapted to emit an energy beam, and a component building area including a base extendable between and vertically movable relative to opposed walls. The component building area includes a platform supported by the base and extendable between the walls, the platform having a layer onto which powdered material is applied, the powdered material being melted or sintered by the energy beam to form a component. The component building area includes an articulation device for rotating the platform about a horizontal axis, and a powder recovery arrangement. The apparatus includes subsequent to formation of the component, the articulation device rotating the platform about the horizontal axis for collecting loose powder by the powder recovery arrangement by virtue of gravity.

Abstract: A method of fabricating a cross-layer pattern in a layered object is disclosed. The method is executed by an additive manufacturing system and comprises: dispensing a patterning material onto a receiving medium to form a first pattern element; dispensing a first layer of modeling material onto the first pattern element while forming a first open cavity exposing at least a portion of the first pattern element beneath the first layer; and dispensing patterning material onto the exposed portion of the first pattern element and the first layer to form a second pattern element contacting the first pattern element.

Abstract: Methods, apparatus, systems and articles of manufacture are disclosed to recycle 3D build material including a 3D printer having a build platform, a vibration generator to alternately apply a first vibration mode to the build platform to move build material on the build platform in a first direction, and to apply a second vibration mode to the build platform to move the build material in a second direction and an air handler to generate an airflow to remove the build material from the build platform.

Abstract: A rotating nozzle assembly for a die machine connectable to a dough extruder has a stationary sleeve with a first end having internal and external annular recesses and an annular stepped seating surface and a second end mountable in the die machine mounting plate. A nozzle has a first end rotatably disposed in the stationary-sleeve first-end internal annular recess, a second end and a radially outwardly-protruding annular ring between the first and second nozzle ends. A ring seal is disposed between the stationary-sleeve first-end annular stepped seating surface and the radially outwardly-protruding annular nozzle ring. A nozzle cap is fixedly attached to the stationary-sleeve first end. The nozzle is rotatably disposed in the nozzle cap. The nozzle second end extends beyond the nozzle cap. An annular stepped axial thrust bearing surface in the nozzle cap prevents relative axial movement of the nozzle while allowing rotation of the nozzle.

Abstract: A machine component is formed of a coalesced metal body of multiple zones of material having at least one high hardness surface, along with high yield strength and good thermal conductivity. The coalesced metal body can have a zone of steel and a zone of copper, and have a transition zone in which the zones of steel and copper coalesce. The coalesced metal body has a machined surface on the zone of steel on a first side of the coalesced metal body. The zone of copper has a proximal boundary disposed proximal to, and separated by, the zone of steel, from the machined surface. Also the zone of copper has a distal boundary distal to the machined surface and proximal to a second surface of the coalesced metal body.

Abstract: Device for printing three-dimensional objects using an energy-field projection system. In operation, energy is projected into a print medium according to a four dimensional (4D) energy-field function for exposing the print-medium to a threshold energy-intensity level that causes the print medium to harden in the shape of a three-dimensional object.