The present invention provides a bladed rotor wheel for a gas turbine engine comprising at least a rotatable forged disc, the rotatable forged disc comprising a front surface and a back surface, at least one rim surface, and a plurality of projections located on at least a portion of at least one of the front or back surface and/or on the rim surface; wherein the projections are 3D printed features protruding outwards from the front, back and/or rim surface; the projections are arranged forming a pattern so that a heat transfer capability is created at the front, back and/or rim surface; and the ratio of the distance between projections to the forged disc external radius is lower than 0.15. Furthermore, the present invention also provides a method for manufacturing a rotatable forged disc for a bladed rotor wheel.

By melting a shaping material in which a metal powder and a binder are mixed and by carrying out injection molding (primary shaping) in an injection mold, an injection molded body, or an intermediate shaped body are produced. The injection molded body or the intermediate shaped body is placed by a transfer mold and is subjected to a gravity shaping (secondary shaping) with a transformation. A sintered body is manufactured by carrying out debindering and sintering to the injection molded body.

A method of constructing a heat exchanger includes providing a base, and additively manufacturing a plurality of first walls substantially parallel and substantially vertical while being manufactured, wherein the plurality of first walls are spaced apart and attached to the base. The method also includes removing at least a portion of a build powder located between the plurality of first walls and attaching a parting sheet to the plurality of first walls. The method also includes additively manufacturing a plurality of second walls substantially parallel and substantially vertical while being manufactured and are spaced apart.

A fin block is provided for a calibrating device for the calibrating of an extruded profile. The fin block includes a fin structure, which has a plurality of fins which are spaced apart from one another by grooves and are arranged in longitudinal direction of the fin block, wherein the fins of the fin structure have a variable dimension in longitudinal direction of the fin block. Further, there is provided a method for the production of the above-mentioned fin block and a calibrating device, which includes a plurality of the above-mentioned fin blocks. Furthermore, there is provided a system for the additive manufacture of the above-mentioned fin block, a corresponding computer program and corresponding data set.

One or more embodiments of the present disclosure relate to partitioning of objects for additive manufacture. A method may include defining one or more partition lines in an object of a build file. The build file may comprise instructions for additively manufacturing the object. The method may also include generating part build files based on the build file and the one or more partition lines. The part build files may comprise instructions for additively manufacturing parts of the object. The method may also include generating a physical instance of each part of the object according to the part build files. The method may also include assembling the physical instances of the parts into a physical instance of the object. The method may also include applying heat to the physical instance of the object. Related devices, systems and methods are also disclosed.

By melting a shaping material in which a metal powder and a binder are mixed and by carrying out injection molding (primary shaping) in an injection mold, an injection molded body, or an intermediate shaped body are produced. The injection molded body or the intermediate shaped body is placed by a transfer mold and is subjected to a gravity shaping (secondary shaping) with a transformation. A sintered body is manufactured by carrying out debindering and sintering to the injection molded body.

A heat exchanger includes a base and a plurality of substantially parallel and substantially vertical walls spaced apart and integrally formed with the base via additive manufacturing. The heat exchanger also includes at least one parting sheet not integrally formed with the plurality of walls, but being attached to the plurality of walls, defining flow channels between the walls, the base, and the at least one parting sheet.

A method for producing a tubular body with reduced internal stress uses 3D printing. The tubular body has an outer wall with a stiffening structure extending along at least part of the outer wall. The method sets a printing plane for 3D printing with a 3D printer, and prints a tubular body layer in the printing plane with the 3D printer. The tubular body layer has an outer wall layer and a stiffening structure layer extending in the printing plane along a periphery of the outer wall layer. The stiffening structure layer has at least two portions spaced apart from one another. The method produces an outer wall with a stiffening structure for a tubular body with reduced internal stress.

A 3D item formed on a base having a cavity or void to form an anchor. An extruded filament of a heated material is first deposited into the cavity at a high temperature and high flow rate such that the material flows easier and fills the cavity and forms the anchor. After the cavity is filled such that the anchor is formed, the extrusion of the filament continues at a lower temperature and at a lower flow rate to form the 3D item upon the anchor. The extruded filament in the cavity and the 3D item are a unitary item.

A 3D item formed on a base having a cavity or void to form an anchor. An extruded filament of a heated material is first deposited into the cavity at a high temperature and high flow rate such that the material flows easier and fills the cavity and forms the anchor. After the cavity is filled such that the anchor is formed, the extrusion of the filament continues at a lower temperature and at a lower flow rate to form the 3D item upon the anchor. The extruded filament in the cavity and the 3D item are a unitary item.