Abstract: A modified ethylene-vinyl alcohol copolymer fiber includes an ethylene-vinyl alcohol copolymer containing 0.1 to 10 mol % of a modified component and 5 to 55 mol % of ethylene, and has a crystallinity of 25% to 50%.

Abstract: An additive manufacturing method includes providing a polymeric material and changing a cooling rate of the polymeric material by adding a second material to the polymeric material. The additive manufacturing method also includes providing the polymeric material and the added second material to an additive manufacturing apparatus and depositing the polymeric material, having the changed cooling rate, with the additive manufacturing apparatus at a deposition rate that is based at least in part on the changed cooling rate of the polymeric material.

Abstract: A method for producing a three-dimensional object comprising computing a sequence of back-projections describing the three-dimensional object to be formed from different orientation angles of the object, defining a sequence of patterns of light using the back-projections, and irradiating with each of the patterns of light at the respective corresponding orientation angle. According to the defined sequence, a photoresponsive material is capable of altering its material phase, upon irradiation by light, thereby creating a three-dimensional distribution of alterations within the photoresponsive medium which physically reproduces the three-dimensional object, thereby creating the three-dimensional object.

Abstract: An apparatus including a three-dimensional (3D) drawing pen can permit a user to draw in free space to form a 3D object. The 3D drawing pen can include a housing, an actuator, and a nozzle assembly. The housing is configured to receive material therein and fit in a user's hand. The actuator is coupled to the housing and is configured to control a movement of the material. The nozzle assembly is configured to permit the material to be extruded to permit the user to form the three-dimensional object.

Abstract: A three-dimensional shaping apparatus includes a discharge portion discharging a shaping material, a shaping stage on which the shaping material discharged from the discharge portion is stacked, a temperature adjustment portion provided in the shaping stage to adjust a temperature of the shaping stage, and a control portion. The control portion stacks the shaping material on the shaping stage to shape and cure a three-dimensional shaping object while changing a relative position between the discharge portion and the shaping stage, and then, heats or cools a portion of the cured three-dimensional shaping object in contact with the shaping stage by controlling the temperature adjustment portion to adjust the temperature of the shaping stage.

Abstract: The present invention relates to a three-dimensional printing apparatus using a digital light processing (DLP) projector with a laser scanner, the apparatus comprising: a resin storage unit storing a photocurable resin; a DLP projector unit projecting light to the resin storage unit; a molding stage unit provided to be capable of being lifted and lowered in a vertical direction from a bottom of the resin storage unit; a laser scanner unit performing scanning of light for the resin storage unit; a scanner transfer unit allowing the laser scanner unit to move in an x-axis direction; an image processing unit dividing one sectional image of a sculpture into a core portion and a shell portion; and a controller receiving data on the core portion and the shell portion from the image processing unit, controlling the DLP projector, the laser scanner unit, the scanner transfer unit, and the molding stage unit.

Abstract: The present subject matter is directed towards a system and a method for selectively post-curing a three-dimensional (3D-printed) object to attain variable properties. The system comprises a selective post-curing chamber coupled to a computer in communication with a database for accessing a digital model or data concerning the 3D-printed object. The chamber comprises a movable light source assembly and a mounting platform for supporting at least one 3D-printed object thereon. The computer includes one or more executable instructions for selectively emitting a curing light onto the 3D-printed object along a predetermined curing toolpath based on the digital model. The curing of the 3D-printed object along the predetermined curing toolpath generates variable properties along different regions of the 3D-printed object.

Abstract: The disclosure is of and includes at least an apparatus, system and method for a print head for additive manufacturing. The apparatus, system and method may include at least two proximate hobs suitable to receive and extrude therebetween a print material filament for the additive manufacturing, each of the two hobs comprising two halves, wherein each of the hob halves comprises teeth that are offset with respect to the teeth of the opposing hob half; a motor capable of imparting a rotation to at least one of the two hobs, wherein the extrusion results from the rotation; and an interface to a hot end capable of outputting the print material filament after at least partial liquification to perform the additive manufacturing.

Abstract: Disclosed is an extruder and a method for extruding cord reinforced tire components, wherein the extruder includes an extruder head with a die and a cord guide, wherein the die is provided with a cross sectional profile that defines a first cross section of the extrusion material in the die, wherein the cross sectional profile has a profile height, wherein the cord guide is arranged for guiding the cords into the die at a cord entry height, wherein the extruder head is provided with first heating elements, wherein the extruder comprises a control unit that is operationally connected to the first heating elements for generating an adjustable height temperature gradient in the extrusion material across the profile height to control swelling of the extrusion material relative to the cord entry height from the first cross section to a second cross section after the extrusion material leaves the die.

Abstract: A method of printing a three-dimensional structure onto a base having irregularities on the surface is disclosed. A sensing device determines the depth of the irregularity on the surface. A computing system receives an image file including a predetermined thickness of a layer to be printed onto the base. The predetermined thickness is adjusted based on the depth of the irregularity. A printing device prints a layer onto the base having the adjusted predetermined thickness print on the irregularity to make the surface substantially smooth.

Abstract: A three-dimensional printing system is for fabricating or manufacturing a three-dimensional article. The three-dimensional printing system includes a substrate, a light engine, a radiation sensor, and a controller. The substrate has a surface positioned proximate to a build field. The surface supports a calibration target which includes or defines elongate light modulating bars disposed at two different orientations and including a Y-bar aligned with a Y-axis and an X-bar aligned with an X-axis. The light engine includes a plurality of projection modules including at least a first projection module and a second projection module. The first projection module configured to project an array of pixels onto a first image field. The second projection module configured to project an array of pixels onto a second image field.

Abstract: In an example implementation, a method of printing a multi-structured three-dimensional (3D) object includes forming a layer of sinterable material. The method includes processing a first portion of the sinterable material using a first set of processing parameters and processing a second portion of the sinterable material using a second set of processing parameters. The processed first and second portions form, respectively, parts of a first and second structure of a multi-structured 3D object.

Abstract: An additive manufacturing system includes: (a) a build platform dispensing assembly carrying a plurality of build platforms; (b) at least two additive manufacturing apparatus, each apparatus configured for receiving a removable build platform on which objects can be produced; (c) a build platform buffering assembly configured for removably receiving at least one build platform on which an object has been produced; (d) a cleaning apparatus; and (e) a robot operatively associated with each cleaning apparatus, the at least two additive manufacturing apparatus, the build platform dispensing assembly, and the build platform buffering assembly.

Abstract: Examples of a 3D printing apparatus arranged to perform a print operation using build material, and methods of operating such a 3D printing apparatus, are described. In one case, a 3D printer is arranged to perform a print operation using build material whilst a build material temperature sensed by the printer is below a threshold temperature of the build material. The printer is arranged to obtain a threshold temperature indicator in advance of a respective print operation.

Abstract: The present invention relates to a stereolithography device (100) comprising a light source (101) for emitting light to cure a light-curing material (121); a sensor (103) for determining an actual value of the light intensity of the emitted light; and a control unit (105) for adapting the electric current through the light source (101) until the actual value of the light intensity reaches a specified desired value.

Abstract: The invention relates to a stereolithography device having a replaceable bottle to receive printing material, which bottle may be stored in or on a bottle holder and from which printing material may be withdrawn into the stereolithography device by means of a device-sided holder. A filling level sensor is attached to the bottle holder by which a filling level of the printing material in the bottle can be detected. A mini memory device is associated to the bottle where the stereolithography device stores information regarding the printing material in the bottle, in particular the filling level thereof.

Abstract: Modular additive manufacturing systems, related methods for simultaneously building three-dimensional parts in successively bonded layers, and related computer readable storage medium. A plurality of build assemblies is laid out along at least one direction of a manufacturing path defining a loop, and at least one build assembly is functioning to build a three-dimensional part from build material according to build instructions. A guidable module is guided via a guiding assembly along the manufacturing path to repeatedly perform at least one step necessary to build the three-dimensional part on each functioning build assembly.

Abstract: An additive manufacturing system has a controller configured to modify numerical control programming instructions to form interlocking structures that improve object structural integrity in the Z-direction. The interlocking structures are produced by forming one layer with swaths that are separated by gaps and another layer that is formed over the gaps to fill the gaps and lay over the swaths forming the gaps.

Abstract: Devices, systems, and methods for monitoring a powder layer in additive manufacturing are disclosed. A method includes receiving leading and trailing image data from an image signal processor that is optically coupled to a plurality of leading and trailing optical fibers arranged on a moving powder distributor, the leading and trailing image data corresponding to images of the powder layer, selecting at least one point on the powder bed that is located within a leading region of interest, determining first characteristics of the point, when the point is located within a trailing region of interest due to movement of the moving powder distributor, determining second characteristics of the point, and comparing the first characteristics to the second characteristics to monitor the powder layer distributed by the moving powder distributor.

Abstract: A three-dimensional (3D) printing device includes a first cylinder. The first cylinder may include a first plurality of holes defined therein. The 3D printing device may include a second cylinder interior and coaxial to the first cylinder that includes a second plurality of holes open to an interior of the first cylinder. The 3D printing device may also include a third cylinder interior to the first cylinder and exterior to the second cylinder, the third cylinder including a longitudinal cutout open to the first cylinder. The 3D printing device may include a supply tube open to the second cylinder, the supply tube to provide an amount of build material to an interior portion of the second cylinder.