Abstract: A photocurable material formulation for a lost model that has a high elastic modulus, shows small thermal expansion, has heat resistance in a certain temperature region, and is free of a photoacid generator to be used in an epoxy material or the like. The formulation is a photocurable composition including curable materials formed of monofunctional (meth)acrylates each having a molecular weight of 150 or more and less than 350, and a bifunctional (meth)acrylate having a molecular weight of 200 or more and less than 400.

Abstract: A solution-based system for printing a 3D structure is provided and includes a substrate; a first solution including an organic molecule including a functional group at each end for creation of self-assembled monolayers (SAMs) including a first self-assembled monolayer (SAM) as a building block for printing the 3D structure, wherein the first solution is applied to a surface of the substrate to form the first SAM including a first SAM surface as a basis for the 3D structure; a second solution including metal ions, wherein the substrate with the first SAM is immersed into the second solution, and wherein the first solution is applied to the substrate which is immersed in the second solution thereby obtaining molecular-metal SAMs to provide a multiple layered SAM material; and means for applying a force and forming the 3D structure from the multiple layered SAM material, wherein the 3D structure is provided on the substrate.

Abstract: A build system is provided with: a build apparatus that performs a build process for forming a build object by supplying build materials to an irradiation area of an energy beam from a supply system while irradiating a target object with the energy beam from an irradiation system; and a change apparatus that is configured to change a relative position between the energy beam and the target object, wherein the build system differentiates a condition of the build process that is performed at a first area of the target object and a condition of the build process that is performed at a second area of the target object.

Abstract: A method and an apparatus of a powder bed fusion additive manufacturing system that enables a quick change in the optical beam delivery size and intensity across locations of a print surface for different powdered materials while ensuring high availability of the system. A dynamic optical assembly containing a set of lens assemblies of different magnification ratios and a mechanical assembly may change the magnification ratios as needed. The dynamic optical assembly may include a transitional and rotational position control of the optics to minimize variations of the optical beam sizes across the print surface.

Abstract: Examples relate to a print station of a three-dimensional (“3D”) printing apparatus, and method of 3D printing, the print station including a substrate configured to hold a printed object, the substrate having a longitudinal axis, and a print system over the substrate, the print system including a powder distribution device including a blade-shaped end, and a powder uniformization device located at a distance from the powder distribution device along a direction parallel to the longitudinal axis.

Abstract: A method of making an object on a bottom-up stereolithography apparatus is provided. The apparatus includes a light source, a drive assembly, and a controller operatively associated with the light source and the drive assembly, with the light source and/or the drive assembly having at least one adjustable parameter that is adjustable by the controller. The method includes installing a removable window cassette on the apparatus in a configuration through which the light source projects, the window cassette comprising an optically transparent member having a build surface on which an object can be produced, and with the optically transparent member having and at least one variable property therein; and then modifying the at least one adjustable parameter by the controller based on the at least one variable optical property of the window; and then producing the object on the build surface from a light-polymerizable liquid by bottom-up stereolithography.

Abstract: Photocurable colloid binders are provided that overcome deficiencies associated with 3D printing of high molecular weight polymers via VAT photopolymerization. Methods of additive manufacturing are also provided using the binders. The approaches described herein effectively decouple the viscosity-molecular weight relationship by synthesizing and processing photo-reactive aqueous colloids that are sequestered within a photocrosslinkable scaffold. Sequestering polymers within discrete internal phases prevents inter-particle entanglement of the polymer chains, thus ensuring low viscosity. VP of polymer colloids results in a solid green body embedded with high molecular weight polymer particles. A post-processing heated drying step allows the polymers to coalesce and further entangle, forming a semi-interpenetrating network with mechanical performance of the high molecular weight material. The resins can further include inorganic particles such as silica and other ceramics, metal particles, and the like.

Abstract: Provided herein photo-reactive inks, thermal-curable materials and objects (e.g., medical implants, scaffolds, devices, etc.) made therefrom, and methods of preparation and use thereof.

Abstract: Methods and apparatus comprising a dewetting material and a polymerization liquid that are immiscible and dewetting, and can be used for the formation of three-dimensional objects, wherein the method does not require a dead zone. Additionally, methods and apparatus that employ the use of a flowing dewetting material to provide a shearing interface to reduce interfacial adhesive forces.

Abstract: Modeling material formulations and formulation systems usable in additive manufacturing of a three-dimensional object, featuring, when hardened, a Shore A hardness lower than 10 and/or a Shore 00 hardness lower than 40, are provided. Additive manufacturing processes utilizing these formulations and formulation systems, and three-dimensional objects obtainable thereby, are also provided.

Abstract: A system and method is provided to construct a structure using three dimensional printing of extrudable building material to a wall surface of a structure. According to one embodiment, a printing assembly is moveably disposed above the surface, and extrudable building material is applied from a nozzle onto the surface. One or more profilometers measure at periodic intervals along a geometric cross-section of a bead of extrudable building material. One or more controllers compare the measured cross-section to a predetermined, target cross section and one or more controllers periodically change, for example, the rate of application and/or the viscosity of the extrudable building material applied along the longitudinal axis. The nozzle direction can change, and the profilometers can be rotated about the nozzle along different longitudinal axes, or directions, depending on the wall locations being formed.

Abstract: A high-throughput, three-dimensional microelectrode array for in vitro electrophysiological applications includes a 3D printed well plate having a top face and bottom face, and a plurality of culture wells formed on the top face of the well plate. Each culture well includes a plurality of vertical microchannels on the top face and microtroughs formed on the bottom face and communicating with the microchannels. A conductive paste fills the microtroughs and the microchannels and forms self-isolated microelectrodes in each culture well and conductive traces that communicate with the self-isolated microelectrodes.

Abstract: A print head for printing three-dimensional structures made of concrete and a method used to deposit layers of concrete material one on top of the other. The print head is configured to be moved in space and to deposit individual layers of a concrete material, which forms the structure to be produced, one on top of the other. The print head includes a feeder configured to provide the concrete material, a conveying device configured to receive the concrete material from the feeder and to convey it, a shaping section configured to be filled with the pressurized concrete material and to define lateral dimensions of the layer to be deposited, an exit section pointing in a direction opposite to a feed direction of the print head, and an exiting prevention section configured to prevent the concrete material from exiting in the feed direction of the print head.

Abstract: The invention provides devices, systems, and methods for 3D printing. The invention employs slurries of particles or a solute in a carrier fluid, which may be a liquid or gas, in printing. The use of a slurry is advantageous in allowing for printing in any orientation.

Abstract: The present disclosure provides compositions and methods for producing hydrogel matrix constructs. Methods of using hydrogel matrix constructs for tissue repair and regeneration and for the oxygenation of red blood cells are also disclosed.

Abstract: A method of forming a cast component and a method of forming a casting mold. The method is performed by connecting at least one wax gate component to a ceramic core-shell mold. The ceramic core-shell mold includes at least a filter, first core portion, a first shell portion, and at least one first cavity between the core portion and the first shell portion. The core-shell mold may manufactured using an additive manufacturing process and may include an integrated ceramic filter. At least a portion of the ceramic core-shell mold and the wax gate component is coated with a second ceramic material. The wax gate component is then removed to form a second cavity in fluid communication with the first cavity.

Abstract: The present disclosure relates to systems and methods for performing large area laser powder bed fusion (LBPF) to form a plurality of layers of a 3D part in a layer-by-layer fashion using meltable powder particles. In one implementation the system makes use of a first light source, which may be a diode laser subsystem, for generating a first light pulse of a first duration. The first light is used to preheat a substrate underneath a new layer of powder particles, wherein the substrate is formed from a previously fused quantity of the powder particles. A second light source, which may be a pulse laser, generates a second light pulse subsequent to the first light pulse. The second light pulse has a second duration shorter than the first duration by a factor of at least about 10, and fully melts the new layer of powder particles in addition to the substrate, to achieve a smooth printed layer. The wavelength of the first light pulse also differs from a wavelength of the second light pulse.

Abstract: A method of forming a cast component and a method of forming a casting mold. The method is performed by connecting at least one wax gate component to a ceramic core-shell mold. The ceramic core-shell mold includes at least a first core portion, a first shell portion, and a second shell portion, wherein the first shell portion is adapted to interface with at least the second shell portion to form at least one first cavity between the core portion and the first and second shell portions. The core-shell mold may be inspected and assembled prior to connection of the wax gate component. At least a portion of the ceramic core-shell mold and the wax gate component is coated with a second ceramic material. The wax gate component is then removed to form a second cavity in fluid communication with the first cavity.

Abstract: The invention relates to an additive manufacturing process for producing a silicone elastomer item. In particular, the invention relates to an additive manufacturing method for producing a silicone elastomer item from a photocrosslinkable silicone composition. The invention also relates to a photocrosslinkable silicone composition.

Abstract: This disclosure describes three-dimensional printing kits, methods, and systems for three-dimensional printing with directionally-dependent reflective particles. In one example, a three-dimensional printing kit can include a powder bed material and a fusing agent to selectively apply to the powder bed material. The powder bed material can include polymer particles and directionally-dependent reflective particles. The directionally-dependent reflective particles can be chemically and thermally stable at a melting point temperature of the polymer particles. The fusing agent can include water and a radiation absorber to absorb radiation energy and convert the radiation energy to heat.

Abstract: A 3D printing system includes a vat containing a liquid photopolymer resin and a rigid base on which an object is configured to be printed. A control arm connected to the rigid base is configured to move the rigid base relative to the vat. A first light source is configured to emit light to the vat to form the object on the rigid base. A second light source is configured to emit light on the object externally of the liquid photopolymer resin in the vat to cure the object.

Abstract: Methods, systems, and/or apparatuses for making an object on a bottom-up stereolithography apparatus that includes a light source, a drive assembly, optionally a heater and/or cooler, and a controller. The light source, optional heater and/or cooler, and/or the drive assembly have at least one adjustable parameter that is adjustable by said controller. An example method comprises (a) installing a removable window cassette on said apparatus in a configuration through which said light source projects, said window cassette comprising an optically transparent member having a build surface on which an object can be produced, and with said optically transparent member having at least one thermal profile associated therewith; and then (b) modifying said at least one adjustable parameter by said controller based on said at least one thermal profile of said optically transparent member; and then (c) producing the object on said build surface from a light-polymerizable liquid by bottom-up stereolithography.

Abstract: An apparatus and method for treating a plastic molded article. The apparatus includes a treatment chamber that can be closed and temperature-controlled. A vapor generating unit generates vapor of a treatment liquid. A fluid connection between the treatment chamber and the vapor generating unit feeds vapor to the treatment chamber and returns condensate back to the treatment chamber. A pressure equalizing device transfers waste air at atmospheric pressure and equalizes pressure with the atmospheric pressure during treatment. The pressure equalizing device retains vapor and prevents vapor from escaping into the atmosphere. A vapor phase is generated by heating a treatment liquid to its boiling point. The treatment liquid includes a solvent that dissolves or solubilizes the plastic. The article is exposed to the vapor phase for a predetermined time and removed from the vapor phase. Residual treatment liquid present on the article is removed.

Abstract: A method of printing a hydrogel scaffold is provided which includes providing a container containing an ink and a liquid that is immiscible with the ink; applying light from a light source to the ink to form a portion of the hydrogel scaffold; and applying light from a light source one or more additional times to produce one or more additional portions of the hydrogel scaffold.

Abstract: A method for continuously forming a three-dimensional body from a mixture, the mixture comprising at least 15 vol % solid particles and a radiation curable material. The method allows the continuous production of three-dimensional bodies comprising to a high content ceramic particles at a forming speed of at least 25 mm/hour.

Abstract: A method for printing a three-dimensional part with an additive manufacturing system, which includes providing a part material that compositionally has one or more semi-crystalline polymers and one or more secondary materials that are configured to retard crystallization of the one or more semi-crystalline polymers, where the one or more secondary materials are substantially miscible with the one or more semi-crystalline polymers. The method also includes melting the part material in the additive manufacturing system, forming at least a portion of a layer of the three-dimensional part from the melted part material in a build environment, and maintaining the build environment at an annealing temperature that is between a glass transition temperature of the part material and a cold crystallization temperature of the part material.

Abstract: A method for manufacturing an object, in particular an orthodontic appliance, by a 3D-printing device comprising a supply device for provision of a non-solidified material and means for illumination to solidify a layer of non-solidified material provided by the supply device at least zonally to fabricate the object, characterized by the following steps: a virtual model of the object to be printed is provided for the 3D-printing device, the supply device provides a layer of the non-solidified material, the means for illumination solidify the layer at least zonally, whereby the means for illumination comprises illumination pixels arranged in a grid, preferably with a dimension (between 10 ?m and 80 ?m, particularly preferred between 30 ?m and 50 ?m, wherein at least one dimension of the object represented by the virtual model is chosen to be aligned with the dimension of the illumination pixels.

Abstract: Embodiments in accordance with the present invention encompass compositions encompassing a latent organo-ruthenium compound, a pyridine compound, a photosensitizer and an ultra violet light blocking compound along with one or more monomers which undergo ring open metathesis polymerization (ROMP) when said composition is exposed to suitable actinic radiation to form a substantially transparent film or a three dimensional object. Surprisingly, the compositions are very stable at ambient conditions to temperatures up to 80° C. for several days and undergo mass polymerization only when subjected to actinic radiation under inert atmosphere such as for example a blanket of nitrogen. Accordingly, compositions of this invention are useful in various opto-electronic applications, including as 3D printing materials, coatings, encapsulants, fillers, leveling agents, among others.

Abstract: The present invention provides a molding material excellent in dimensional stability and operation safety during surface treatment after molding. The molding material according to the present invention is for use in molding by a hot melt lamination method and contains an ethylene-vinyl alcohol copolymer.

Abstract: A method of making a bonded polymeric assembly by transfer printing comprises contacting a stamp with a solid-phase ink comprising a photoresist to form an inked stamp, where the solid-phase ink is reversibly bound to the stamp. The inked stamp is aligned with an object comprising the photoresist and is stamped onto the object. The stamp is then removed, thereby transferring the solid-phase ink onto the object. The solid-phase ink is thermally joined with the object. Thus, a bonded polymeric assembly comprising a bonded joint between the solid-phase ink and the object is formed.

Abstract: A multi-material printer for using multiple materials, e.g., bioinks, to quickly fabricate structures, such as high-throughput screening microfluidic chips. The printer's light projector for emits light in an exposure sequence to cure material in an additive manufacturing process. The printer further includes a motion stage operable to move a build platform into and out of the reservoir in coordination with the exposure sequence. The printer further includes an indexing stage having a work table for supporting the reservoir. The indexing stage is operable to selectively align the build platform with multiple different materials of the reservoir. The multiple materials may be arranged at distinct angular positions within a single reservoir, and the indexing stage may be operable to rotate the work table to align the build platform with different materials during the exposure sequence for a quick transition among different materials without refilling of materials, exchange of reservoirs, etc.

Abstract: A fluidic device includes an impermeable base, single-strand walls coupled to the impermeable plate. The single-strand walls include a plurality of loops, each loop has a lower part of a double wedge and an upper part of a double wedge aligned with the lower part of the double wedge. The device also includes a lattice connected to the single-strand wall with a loop-as-wipe connection and a gabbled roof disposed opposite the impermeable base and coupled to the tops of the single-strand walls.

Abstract: A system for manufacturing a three-dimensional (3D) article includes a controller. The controller is configured to (A) receive a solid model defining the 3D article having an unsupported (downward facing) surface and (B) define a support structure for the unsupported surface. The support structure includes (1) a lower support beam, (2) a node body, and (3) at least three branches. The node body is defined at an upper end of the lower support beam. The node body has an upper surface that is generally in facing relation with the unsupported surface. The at least three branches extend with a diverging geometry away from the upper surface of the node body and to the unsupported surface. The branches are individually defined by a vertical sequence of contour scan patterns.

Abstract: The invention relates to a method for processing an optically reactive material, comprising: providing a starting material (3), which is optically reactive and fills a working volume (2); and optically processing the starting material (3) in the working volume (2) by means of irradiation of light of a first wavelength and of a second wavelength, wherein the light of the first wavelength and of the second wavelength is provided by a lighting device and at least one material property of the starting material is changed by means of the optical processing and the optical processing comprises the following: irradiating a first partial layer volume of the working volume (2) filled with the starting material (3) using the light of the first wavelength; irradiating the first partial layer volume of the working volume (2) using the light of the second wavelength, wherein the light of the second wavelength is projected into the working volume (2) by means of a projection device (7) capturing only the first partial laye

Abstract: A method of fabricating a three-dimensional article comprises providing a spatially coherent light source (101, 201), generating from the light source (101, 201), patterns of light based on computed tomographic projections of the three-dimensional article, and projecting the patterns of light into a photoresponsive medium. The projecting is configured to define a three-dimensional dose distribution, thereby locally altering the phase of the photoresponsive medium and creating the article.

Abstract: Modeling material formulations and formulation systems usable in additive manufacturing of a three-dimensional object, featuring, when hardened, a Shore A hardness lower than 10 and/or a Shore 00 hardness lower than 40, are provided. Additive manufacturing processes utilizing these formulations and formulation systems, and three-dimensional objects obtainable thereby, are also provided.

Abstract: Disclosed herein are an adhesion blocking element, a three-dimensional printing device and a three-dimensional printing method. The adhesion blocking element comprises: one light-transmittable main body comprising a first surface and a second surface which are disposed opposite to each other, and side faces connecting the first surface and the second surface; and a plurality of microstructures arranged on the main body, wherein each microstructure has one cavity formed in the main body and one first open face which is arranged on the first surface of the main body and communicated to the cavity. The present invention decreases the adhesion between the adhesion blocking element and the cured layer by improving the structure of the adhesion blocking element itself, and eliminates the negative pressure adsorption between the cured layer and the adhesion blocking element, so that it is easier to peel the adhesion blocking element off from the cured layer.

Abstract: A three-dimensional shaping device includes: a stage whose shaping surface has a first groove and a second groove extending in a first direction; a discharge unit configured to supply a shaping material to the shaping surface; a movement mechanism configured to relatively move the stage and the discharge unit; and a control unit configured to control the discharge unit and the movement mechanism.

Abstract: A method of controlling a three-dimensional (3D) bioprinter includes a nozzle end aligning operation (S100) that includes an operation (a) in which a nozzle end alignment sensor is installed at a predetermined position on a bed in a printing chamber and a sensing point of the nozzle end alignment sensor is positioned at an origin position of the bed, an operation (b) in which the bed is moved toward one side in an X-axis direction and the sensing point of the nozzle end alignment sensor is positioned under a nozzle of a first print module, an operation (c) in which the first print module is moved downward and a Z value of a nozzle end of the first print module is measured, an operation (d) in which the first print module is positioned at an original position and the bed is moved toward the other side in the X-axis direction to position the sensing point of the nozzle end alignment sensor under a syringe, which is disposed at a printing position, of a second print module, an operation (e) in which the second p

Abstract: An extracellular matrix (ECM) mixture and ECM scaffolds made with same are disclosed. The ECM mixture can comprise from about 5% to about 85% by weight of ECM material and from about 15% to about 95% by weight of a polymer material, such as, but not limited to, a biodegradable polyester. The presently disclosed anatomically-shaped porous ECM scaffolds can be formed, for example, using a three-dimensional (3D) printing process, an injection molding process, or any other process.

Abstract: An additive manufacturing device for manufacturing a solid article comprises a laser generation unit, a raw material supply unit, a raw material container containing a raw material and having a raw material surface exposed to a laser beam to be emitted by the laser generation unit in operation and a control unit. The heating device includes a heating surface for heating the raw material surface to form a pre-heated raw material surface. The laser generation unit is disposed with a directing unit to direct the laser beam onto the pre-heated raw material surface according to a computer generated model of the solid article stored in a storage unit associated with the control unit. The laser beam generated by the laser generation unit passes through the heating surface onto the pre-heated raw material surface.

Abstract: Systems and methods are disclosed that include an additive manufacturing assembly having a printing area, a first nozzle comprising a first nozzle having a first aperture diameter and configured to dispense a first material in the printing area, and a second nozzle comprising a second nozzle having a second aperture diameter that is larger than the first aperture diameter and configured to dispense a second material in the printing area.

Abstract: An example method for simultaneously manufacturing a plurality of objects is described. The method includes simultaneously cycling a plurality of pallets through a conveyor system. The conveyor system is cyclical, and the conveyor system includes an entrance point for each pallet, an exit point, and a plurality of manufacturing points corresponding to a plurality of manufacturing devices. Simultaneously cycling the plurality of pallets includes simultaneously cycling the plurality of pallets past the plurality of manufacturing points for two or more cycles, wherein each pallet is associated with a set of manufacturing instructions for a corresponding object. The method further includes, while simultaneously cycling the plurality of pallets through the conveyor system, using a different combination of the plurality of manufacturing devices to manufacture each object in accordance with the set of manufacturing instructions associated with each pallet, thereby manufacturing different objects for each pallet.

Abstract: An additive manufacturing system, and associated methods, comprise an image projection system comprising a plurality of image projectors that project a composite image onto a build area within a resin pool. The composite image comprises a plurality of sub-images arranged in an array. The properties of each sub-image and the alignment of the position of each sub image within the composite image can be adjusted using a set of filters comprising: 1) an irradiance mask that normalizes irradiance, 2) a gamma adjustment mask that adjusts sub-image energy based on a reactivity of the resin, and 3) a warp correction filter that provides geometric correction.

Abstract: The present disclosure provides a 3D printing method including: a resin providing step of providing a dual cure resin; a light curing step of irradiating the dual cure resin by an ultraviolet light to perform 3D printing so as to form an intermediate body having a predetermined lattice shape; a stretching step of applying a stress on the intermediate body in a stretching direction according to a stretching ratio of a predetermined size to stretch and form a stretched body; and a thermal curing step of heating the stretched body to perform thermal curing and shaping so as to form a 3D printing formed body. When the light curing step is performed, a size in a non-stretching direction of the intermediate body is correspondingly pre-compensated based on the stretching ratio. The present disclosure further provides a 3D printing formed body.

Abstract: An irradiation assembly for additively manufacturing three-dimensional objects may include an irradiation device and a magnetic mounting device configured to displaceably support the irradiation device. The irradiation device may include one or more illumination elements respectively configured to emit an energy beam. The magnetic mounting device may include a magnetic slider element coupled to the irradiation device and a magnetic stator element couplable to a housing structure of an additive manufacturing machine. The magnetic stator element may include a displacement track configured to guide the magnetic slider element along a movement path above at least a portion of a construction plane of the additive manufacturing machine while the one or more illumination elements respectively emit the energy beam to selectively irradiate build material at specified regions of the construction plane.

Abstract: Disclosed is a method for cutting dielectric or semiconducting material with a laser. The method includes the following steps: emission of a laser beam including at least one burst of N femtoseconds laser pulses; spatial separation of the laser beam into a first split beam having a first energy, and respectively, a second split beam having a second energy; spatial concentration of energy of the first split beam in a first zone of the material, respectively, of the second split beam in a second zone of the material, the first zone and the second zone being separate and staggered by a distance dx; and adjustment of the distance between the first zone and the second zone in such a way as to initiate a straight micro-fracture oriented between the first zone and the second zone.

Abstract: Provided herein according to aspects of the present invention are resins that: (a) are suitable for use in additive manufacturing techniques such as bottom-up and top-down stereolithography, (b) produce objects that are bioresorbable, and (c) produce objects that are flexible or elastic (preferably at at least typical room temperatures of 25° C., and in some embodiments at typical human body temperatures of 37° C.). Such resins may include: (a) a bioresorbable polyester oligomer having reactive end groups; (b) non-reactive diluent; (c) optionally reactive diluent; and (d) a photoinitiator.

Abstract: Generating tool path data for use in additive manufacturing comprises providing object design data in which at least part of the object is represented abstractly using lines and/or surfaces. The lines and/or surfaces can then be used to provide tool path data for the build layers of an additive manufacturing apparatus. The tool paths can be reconfigured to reduce the overall distance travelled and/or travel time when the additive manufacturing apparatus implements the tool path data. An additive manufacturing parameter for a structural feature of the object can also be selected based on the geometry of the structural feature and specified in the tool path data.

Abstract: A method for making a component at a device is disclosed. In an embodiment the device includes a powder depot, a work space and a laser, wherein the work space includes a powder bed and an assembly, and wherein the assembly includes a thermally insulating embedding mass and a heat conducting mold. In a further embodiment, the method includes fastening, by the assembly, an element at the work space and forming the component at the element by repeatedly moving, by a wiper, powder from the powder depot to the powder bed at the work space and heating, by a laser beam of the laser in an additive process, portions of the powder in the powder bed so that the component is built on the element, wherein the additive process comprises selective laser melting (SLM) or selective laser sintering (SLS), and wherein the embedding mass is independent and distinct from the powder and the component.