APPARATUS FOR SELECTIVE LASER SINTERING AND METHOD OF PRODUCING LARGE-SIZE ARTICLES ON SAID APPARATUS Russian patent published in 2020 - IPC B22F3/105 B33Y30/00 

FIELD: metallurgy.

SUBSTANCE: group of inventions relates to production of metal articles by selective laser sintering. Plant comprises a sealed chamber, a vacuum system, an inert gas feed unit, an inert gas cleaning system, an inert gas circulation system, water cooling system of inert gas, loading hopper for powder material, support for formed product support, leveler, laser system for sintering powder material, cooling system of laser system, control system, powder material dispenser and a vacuum sluice device connecting the loading hopper and dispenser to each other. Loading hopper, vacuum sluice device, dispenser and laser system are located inside sealed chamber in its upper part, support for formed product support is located in lower part of sealed chamber and consists of heated base and substrate. Sealed chamber is equipped with overpressure valve and at least two ventilation holes, which are connected to inert gas supply unit, inert gas circulation system, and vacuum system.

EFFECT: improved operational characteristics of manufactured articles, reduced probability of defects in manufacturing process.

16 cl, 2 dwg