Abstract:
A nozzle (68) for printing three-dimensional parts (52) with an additive manufacturing system (36), the nozzle (68) comprising a nozzle body (78) having an inlet end (80) and a tip end (82) offset longitudinally from the inlet end (80), a tip pipe (86) for extruding a flowable material, an inner ring (90) extending circumferentially around the tip pipe (86) at the outlet end (80), an outer ring (92) extending circumferentially around the inner ring (90), at least one annular recessed groove (94) located circumferentially between the inner ring (90) and the outer ring (92).
Abstract:
Described herein are bioprinters comprising: one or more printer heads, wherein a printer head comprises a means for receiving and holding at least one cartridge, and wherein said cartridge comprises contents selected from one or more of: bio-ink and support material; a means for calibrating the position of at least one cartridge; and a means for dispensing the contents of at least one cartridge. Further described herein are methods for fabricating a tissue construct, comprising: a computer module receiving input of a visual representation of a desired tissue construct; a computer module generating a series of commands, wherein the commands are based on the visual representation and are readable by a bioprinter; a computer module providing the series of commands to a bioprinter; and the bioprinter depositing bio-ink and support material according to the commands to form a construct with a defined geometry.
Abstract:
A fabrication process and method for producing grayscale or full color three-dimensional objects by depositing a first part material layer, printing a first colorization layer on to the first part material layer, depositing a second part material layer on to the first colorization layer, and printing a second colorization layer on to the second part material layer. The part material deposition and coloring agent deposition operations may be repeated until a three-dimensional colored object is formed. The colorization inks used to form at least one of the first and second colorization layers allow the creation of grayscale or full color 3D printed parts. The process facilitates deposition of colorization agents on a part material to produce full color parts, improves color gamut and resolution, allows creation of hidden features within parts (e.g., wear indicators), and enhances aesthetics and functionality of three-dimensional objects with the use of color.
Abstract:
Procédé de dépôt in situ par fabrication additive d'un revêtement sur un carter de turbomachine consistant à déposer sur une surface interne dudit carter de turbomachine (20A, 62) un filament (100, 200, 300, 400, 500, 600) d'un matériau abradable selon une trajectoire de dépôt prédéfinie afin de créer un échafaudage tridimensionnel de filaments formant entre eux un réseau (60) ordonné de canaux, procédé dans lequel un système de dépôt de matière filamentaire (46) est positionné à une position et une distance déterminée de la surface interne du carter; une première couche du revêtement est déposée sur 360°; une rotation du système de dépôt de matière filamentaire est effectuée d'un premier angle déterminé et le système de dépôt de matière filamentaire est positionné à une position et une distance déterminée de la couche déposée; une deuxième couche du revêtement est déposée sur la première couche du revêtement, sur un secteur du carter; un déplacement est effectué d'un écart angulaire déterminé correspondant au premier secteur déjà couvert puis pour les secteurs suivants jusqu'à couvrir 360°; et après avoir effectué une rotation du système de dépôt de matière filamentaire d'un deuxième angle déterminé, le processus est repris pour les couches suivantes jusqu'à obtenir une épaisseur de revêtement souhaitée.
Abstract:
A system for improving transparency and/or smoothness and/or adhesion of layers of a 3D printed object, comprising: a base plate; a 3D printed object mounted on the base plate; a controller; a motion system connected with the base plate and controlled by the controller for enabling movement in Z axis and at least one more axis; and at least one treating device; the at least one treating device configured to be directed towards the 3D printed object for heating a target spot area on one of the outer surface and the inner surface of the 3D printed object during the movement of the base plate.
Abstract:
An additive manufactured structure and methods for making and using same. The structure includes a plurality of layers stacked in a stacking direction. The structure further includes at least one reinforcement structure affixed to the layers and extending at least partially in the stacking direction. The reinforcement structure can hold the layers together to stiffen and strengthen the structure. Mechanical strength of the structure in the stacking direction can advantageously be improved. Shape and spatial distribution of the reinforcement structure can be customized and adapted to the geometry of the layers to enhance strengthening effect. The reinforcement structure can be tension free or have a compressive stress induced by a preload applied during manufacturing. The compressive stress can be adjusted dynamically via a sensor. The structure and methods provide, among other things, a novel means for addressing the inherent weaknesses in parts created by large-scale extrusion deposition processes.
Abstract:
The invention pertains to a method for manufacturing a three-dimensional object with an additive manufacturing system, such as an extrusion-based additive manufacturing system, a selective laser sintering system, and/or an electrophotography-based additive manufacturing system, comprising providing a support material comprising more than 50 % wt. of a polyamide comprising from 60 mole percent to 100 mole percent of recurring units represented by formula (I): - C(O)-A-C(O)-NH-X-NH- (I) wherein A represents a divalent hydrocarbon based group chosen from saturated or unsaturated aliphatics, saturated or unsaturated cycloaliphatics, aromatics comprising at least 5 carbon atoms, arylaliphatics and alkylaromatics; and X represents a divalent group of formula (II) or (III).
Abstract:
3D printed functional dosage forms, and methods for making thereof are disclosed. In one aspect of the disclosure, a dosage form is presented that includes an outer shell printed from a first material and at least one inner core containing an active pharmaceutical ingredient (API) disposed within the outer shell. The dosage form includes an opening structure extending from an outer surface of the outer shell to the at least one inner core. The dosage form may include a plurality of pH sensitive mucoadhesive projections printed from a third material and extending from the outer shell. The dosage form may include a plug printed from the second or third material within the opening structure and can include an outer cap printed over the plug from a fourth material. The dosage form also may include an internal hollow cavity such that the dosage form is buoyant in an aqueous solution.