Abstract: The disclosure provides for cleaning three-dimensional (3D) components printed in a powder bed from adhering powder particles. The 3D-printed components are cleaned with a negative pressure-induced volumetric flow. The 3D-printed components are first removed from the powder bed after their manufacture, then positioned on a feed device and moved together with the feed device into a pressure-tight sealable chamber. In the interior of the chamber negative pressure is subsequently built up and a fluid volumetric flow is applied to the 3D-printed component to be cleaned which results in the powder particles being detached from the 3D-printed component. The powder particles are removed from the sealed chamber in a pressure tight manner via at least one channel conduit which is subjected to negative pressure and are fed to a separation device. The chamber is subsequently released of pressure and then opened for removal of the cleaned 3D-printed component.

Abstract: The position of the molding geometry of an assembled mold relative to a CAD data set is determined so the dimensional accuracy of the cast part to be produced can be evaluated. The position of the molding geometry of a first mold part is measured and compared to a desired position according to a CAD data set. The position is adjusted to optimally adapt it to within tolerances. The first mold part is maintained in its adjusted position while the position of the molding geometry of a second mold part is measured and compared to a desired position according to the CAD data set. The position of the second mold part is adjusted to optimally adapt it to within tolerances. Thereafter, the mold parts are fixed together with a curable molding material deposited into spaces in the mold parts that is allowed to harden.

Abstract: A method for producing a casting mold from a composite mold material for foundry purposes that is composed of different kinds of mold materials that are heat-resistant for the casting of metals and that differ in substantive composition or have different contents of organic or inorganic binders. A solid mold body is prepared from a foundry mold material A that is completely or partially encased during its preparation with a free-flowing chemically bonded foundry mold material B. A composite mold material block is formed after the hardening of the foundry mold material B, which is then machined by a cutting method such as milling, boring, turning, or grinding. The mold cavity is introduced into the mold body consisting of the foundry mold material A, and the inflow system and the feed system are introduced into the mold material block consisting of the foundry mold material B, using CAD data.

Abstract: A rustproof austenitic cast steel part having tensile strength greater than 550 MPA and elongation at break over 30%, is characterised in that the cast steel having an aluminium content of 0 to 4% and a silicon content of 1 to 4% is within an alloying range that is determined by the coordinates of four points (Crequiv.=14; Niequiv.=8), (Crequiv.=14; Niequiv.=14), (Crequiv.=22; Niequiv.=8) and (Crequiv.=22 Niequiv.=16), wherein the chromium and nickel equivalents are calculated from the chemical composition of a cast steel using the relations (1) and (2): Cr equiv . = % ? ? Cr + % ? ? Mo + 1.5 ? % ? ? Si + 0.5 ? % ? ? W + 0.9 ? % ? ? Nb + 4 ? % ? ? A ? ? 1 + 4 ? % ? ? Ti + 1.5 ? % ? ? V + 0 ? .9 ? % ? ? Ta ( 1 ) Ni equiv . = % ? ? Ni + 30 ? % ? ? C + 18 ? % ? ? N + 0.5 ? % ? ? Mn + 0.3 ? % ? ? Co + 0.2 ? % ? ? Cu - 0.

Abstract: A method for producing a casting mold from a composite mold material for foundry purposes that is composed of different kinds of mold materials that are heat-resistant for the casting of metals and that differ in substantive composition or have different contents of organic or inorganic binders. A solid mold body is prepared from a foundry mold material A that is completely or partially encased during its preparation with a free-flowing chemically bonded foundry mold material B. A composite mold material block is formed after the hardening of the foundry mold material B, which is then machined by a cutting method such as milling, boring, turning, or grinding. The mold cavity is introduced into the mold body consisting of the foundry mold material A, and the inflow system and the feed system are introduced into the mold material block consisting of the foundry mold material B, using CAD data.