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1. (WO2018077894) METHOD FOR FAST INERTIZATION OF A CHAMBER OF A MACHINE FOR ADDITIVE PRODUCTION OF COMPONENTS AND ASSOCIATED MACHINE

Pub. No.:    WO/2018/077894    International Application No.:    PCT/EP2017/077195
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Wed Oct 25 01:59:59 CEST 2017
IPC: B22F 3/105
B33Y 10/00
B33Y 30/00
B33Y 40/00
B29C 64/357
B29C 64/364
B08B 9/00
B08B 13/00
Applicants: TRUMPF LASER- UND SYSTEMTECHNIK GMBH
Inventors: HAUGK, Ben
Title: METHOD FOR FAST INERTIZATION OF A CHAMBER OF A MACHINE FOR ADDITIVE PRODUCTION OF COMPONENTS AND ASSOCIATED MACHINE
Abstract:
The invention relates to a method for inertization of a chamber (2) of a machine (1) for additive production of components, in particular a LMF or SLS machine, comprising the following method steps: a. expanding an expansion body (10) in the chamber (2), when a chamber outlet (4) is opened, by filling the expansion body (10) with a pressure fluid (17) in order to displace the gas volume located in the chamber (2) out of the chamber (2), at least in part, in particular completely, through the chamber outlet (4); and b. subsequently filling the chamber (2) with an inert gas (17) through an opened chamber inlet (3) while simultaneously emptying the expansion body (10). The associated machine (1) according to the invention has an expansion body (10), which can be filled with pressure fluid (16) and can be expanded in the chamber (2) and which, in an expanded position in the chamber (2), fills the available free volume in the chamber (2) at least in part, in particular completely.