Recent Patents and Applications for 3D Printers

[EN] A powder of a copolymer with polyamide blocks and polyether blocks. The invention concerns a composition comprising a powder of a copolymer with polyamide blocks and polyether blocks, the copolymer being in particle form with a pulverulent filler content of 0 to 10 percent by mass and the copolymer having a ratio by mass of the polyamide blocks to the polyether blocks of less than or equal to 0.7, the polyamide blocks having a number-average molar mass of less than or equal to 1000 g/mol; and the composition comprising a flow aid at a content of greater than or equal to 0.3 percent by mass. The invention also concerns the process for producing this composition, the use of the composition for constructing three-dimensional articles, and the three-dimensional articles manufactured from said composition.

[EN] The present invention relates to a pinion for a gear train of an aircraft turbine engine, the pinion comprising: – a cylindrical body (2) extending along an axis and configured to engage with a shaft received in the cylindrical body, – a rim (4) concentric with the cylindrical body, – a web (3) defined axially by a front wall (32) and a rear wall (33) and extending radially from the cylindrical body to the rim, each of the front and rear walls having a density, the pinion comprising a cross-linked structure (5) around the cylindrical body between the front wall and the rear wall, the cross-linked structure comprising a unit cell repeated along three axes of a three-dimensional coordinate system, a density of the unit cell being strictly less than each of the densities of the front and rear walls.

[EN] Disclosed is a method for manufacturing an aluminium alloy part by additive manufacturing comprising a step during which a layer of a mixture of powders is melted locally and then solidified, characterised in that the mixture of powders comprises: – first particles (10) comprising at least 80 wt percent of aluminium and up to 20 wt percent of one or more additional elements, and – second particles (20) of yttria, the volume percentage of second particles (20) in the mixture of powders preferably ranging from 0.5 percent to 5 percent.

[EN] Acoustic cowl (20) for a turbomachine or an aircraft propulsion assembly, this cowl having a shape that is annular about an axis and comprising two annular skins, these respectively being radially internal and radially external skins, extending one around the other and joined together by partitions defining cells, one of the skins comprising perforations opening into the cells, characterized in that it is formed of more than six pieces (20a-20n) manufactured independently of one another and assembled to form the cowl, each of these pieces comprising an internal skin portion, an external skin portion, and partitions extending between the internal and external skin portions.

[EN] The invention relates to a powder grain comprising a plurality of channels opening or not, at least one channel being partially or completely obturated by at least one plug, said at least one plug being made of a material having a melting temperature greater than or equal to the maximum operational hot temperature of the powder grain.