Rapid manufacturing method and device for the same comprising oppositely-directed protective gas streams parallel to the powder layer

A device for the additive manufacture of components through the layered bonding of powder particles to one another and/or to a semi-finished product or substrate already produced, using selective interaction of the powder particles with a high-energy beam, comprising a beam-generating device for generation of a high-energy beam and with a component holder, in which the powder to be bonded using the high-energy beam is arranged, and with a stationary unit for generation of a gas flow with a gas inlet and a gas outlet, or with a mobile device for generation of a gas flow, with a nozzle that can move together with the high-energy beam for generation of a local flow of gas at the region of impingement of the beam on the powder,

• wherein the stationary device for generation of a gas flow is configured so that the gas inlet is also operated as a gas outlet, and the gas outlet is also operated as a gas inlet, and/or in such a way that a plurality of gas inlets and gas outlets are provided, wherein at least two gas inlets and/or two gas outlets are configured facing each other,
• or that
• the mobile device generates different directions of flow with respect to the component to be produced.