Patent ID: 11865614
Assignee: LINDE GMBH
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  Y | IPC B

Claim 0:
1. A method for feeding a gas flow to an additive manufacturing space during a manufacturing process, comprising:
providing a metal powder on a built platform,
melting the metal powder with a heat source, and
repeating the aforementioned steps,
wherein the gas flow is established by a pump connected to the manufacturing space wherein the pump is controlled by a set differential pressure,
wherein the set differential pressure is 0.08 mbar to 0.16 mbar when the gas flow consists of Helium, and
wherein the set differential pressure is 0.26 mbar to 0.34 mbar when the gas flow comprises 5 Vol.-% to 40 Vol.-% Argon and 95 Vol.-% to 60 Vol.-% Helium,
wherein the set differential pressure is 0.37 mbar to 0.45 mbar when the gas flow comprises 41 Vol.-% to 60 Vol.-% Argon and 59 Vol.-% to 40 Vol.-% Helium and
wherein the set differential pressure is 0.55 mbar to 0.63 mbar when the gas flow comprises 61 Vol.-% to 95 Vol.-% Argon and 39 Vol.-% to 5 Vol.-%.