摘要:
Method and design of a pressure vessel having an internal supportive structure that reduces pressure forces applied to the external shell of the vessel by distributing such forces via internal bonds mostly connected to a central supporting element. The method and design allow making much lighter and stronger pressure vessels and containers using additive manufacturing technology, known as 3D printing.
摘要:
A method of producing a three-dimensional shaped article (12) includes a step of forming particle layers (9a, 9b) by arranging particles (1a) containing a material for forming a shaped article (12) and particles (1b) containing a material having higher solubility in fluid than the material for forming the shaped article, a step of forming a stack (7) by melting and stacking the particle layers (9a, 9b), and a step of removing the material (7b) having higher solubility in the fluid than the material (7a) for forming the shaped article (12) from the stack (7) by dissolving the material having higher solubility (7b) in the fluid than the material (7a) for forming the shaped article (12) in the fluid.
摘要:
An accretive (additive) manufacturing system comprising an articulable and detachable stage for the component being constructed which permits the movement and exact location of the component's surface in three-dimensional space and optional passing of the control of that location from one set of articulable holder systems to another set of articulable holder systems. Location information about the component's surface being manageable using additional sensor information. The system further comprising at least one means of producing an extrusion of material for forming the component in a controlled way. The means of extrusion being manipulated, in three-dimensional space, by means of an articulated arm.
摘要:
The present invention relates to the use of a polymer comprising polymerized units (A) and (B): (A) at least one first monomer of the formula (I) where n is 3 to 12; m is 0 to 3; R 1 is C 1 -C 10 -alkyl, C 2 -C 10 -alkenyl, aryl or aralkyl; R 2 , R 3 and R 4 are each, independently of one another, hydrogen, C 1 -C 10 -alkyl, C 2 -C 10 -alkenyl, aryl or aralkyl; and (B) at least one second monomer of the formula (II) where R 5 , R 6 and R 7 are each, independently of one another, hydrogen, C 1 -C 10 -alkyl, C 2 -C 10 -alkenyl, aryl or aralkyl; R 8 is C 1 -C 20 -alkyl, C 2 -C 10 -alkenyl, aryl or aralkyl; as a support material in a fused filament fabrication process.
摘要:
A three-dimensional object may be generated. A controller may be to control an energy source to apply energy to a layer of build material on a support member or previous layer to cause a portion of the layer to coalesce and solidify to form a slice of the three-dimensional object. A radiation sensor may be to measure absorbance or gloss of the layer. The controller may be to receive, from the radiation sensor, data representing measured absorbance or measured gloss of the layer. The measured absorbance or measured gloss may be positively correlated with a degree of solidification in the layer. The controller may be to control the apparatus to modify a process parameter if the measured absorbance or gloss indicates an incorrect degree of solidification of a part of the layer.
摘要:
A three-dimensional object may be generated. Coalescing agent may be selectively delivered on a portion of a first layer of build material on a support member or previous layer. Energy may be applied to the first layer to cause the portion of the first layer to coalesce and solidify. A second layer of the build material may be provided on the first layer. While the second layer does not have coalescing agent delivered thereon, energy may be applied to the second layer such that energy may propagate through the second layer to the first layer to cause the portion of the first layer to coalesce and further solidify.
摘要:
A three-dimensional object may be generated. A temperature sensor may be to measure a temperature distribution of build material delivered to a support member. A processor may be to mask a masking region of the measured temperature distribution or correct the measured temperature distribution, based on emissivity data of the build material. A heater may be to heat the build material to a target temperature distribution based on the corrected or masked measured temperature distribution. An energy source may be to apply energy to the build material to cause a portion of the build material to coalesce.
摘要:
A polymeric powder composition for three-dimensional printing includes first, second, and third polymeric particles. The first particles, having a first average size, are present in an amount ranging from about 70 wt% to about 95 wt%. The second particles, having a second average size smaller than the first average size, are present in an amount ranging from about 0.5 wt% to about 21 wt%. The third particles, having a third average size smaller than the second average size, are present in an amount ranging from greater than 0 wt% up to about 21 wt%. Each of the first, second, and third average sizes independently ranges from 5 μm to about 100 μm. A sum of the fractional weight ratios of all of the polymeric particles in the polymeric powder composition equals 1.
摘要:
L'invention concerne un procédé de fabrication d'une lentille ophtalmique, comportant une étape de fabrication additive (100) d'un élément optique intermédiaire par dépôt d'une pluralité d'éléments de volume prédéterminés d'au moins un matériau, ledit élément comprenant une lentille ophtalmique cible adjoint d'au moins une surépaisseur, et une étape de fabriquer par polissage souple (300) ladite lentille à partir dudit élément par la soustraction au moins partielle de la surépaisseur de sorte à filtrer des aspérités formées sur ledit élément durant ladite étape de fabrication additive; ladite étape de fabrication additive comportant une étape de déterminer une consigne de fabrication dudit élément où ladite surépaisseur est déterminée en fonction de paramètres prédéterminés que présente ladite étape de polissage souple, à savoir une caractéristique géométrique représentative d'une fréquence spatiale de coupure et une caractéristique géométrique représentative d'une capacité d'enlèvement de matière.