Granted Patent B2

US 12,623,285 · App. 17/921,504 · Granted May 12, 2026

Inventors: Ulrich Kleinhans (Prittriching, DE); Philip Stroebel (Weidenbach, DE)

Assignee: EOS GmbH Electro Optical Systems

B22F10/28B01D46/0093B01D46/04B01D46/48B22F10/70B33Y10/00B33Y30/00

Abstract

Claims (17)

1 . An additive manufacturing device for manufacturing a component in an additive manufacturing process, the additive manufacturing device comprising:

a process chamber;

a feed system for introducing a build material into the process chamber in layers;

an irradiation unit for selectively solidifying the build material in the process chamber; and

a filter system for purifying a process gas of the additive manufacturing device, the filter system comprising:

a permanent filter that is regenerable and configured to remain installed during repeated operating cycles; and

a cleaning arrangement configured to clean the permanent filter in situ by a reverse-flow cleaning gas pulse to remove collected particles.

2 . The additive manufacturing device of claim 1 , wherein the filter system comprises a filter chamber having a transparent region, and an energy input source configured as a radiant heating system disposed to couple heat radiation into the filter chamber through the transparent region to heat particles entrained in the process gas.

3 . The additive manufacturing device of claim 1 , wherein the permanent filter is configured to be thermally stable at a temperature of more than 150° C.

4 . The additive manufacturing device of claim 1 , wherein the permanent filter comprises a metal filter and/or a ceramic filter and/or a glass wool filter, wherein the metal filter is constructed from at least one corrosion-resistant steel and/or from a nickel-based alloy and/or from copper and/or from mixtures or alloys thereof.

5 . The additive manufacturing device of claim 1 , wherein a mesh size of a filter material of the permanent filter is between 0.5 μm and 30 μm.

6 . The additive manufacturing device of claim 1 , wherein the permanent filter comprises a support structure designed to support a filter surface of the permanent filter, wherein the support structure runs parallel to a filter material of the permanent filter, in at least a subarea on a dirty gas side and/or on a clean gas side of the permanent filter, or is integrated into the permanent filter.

7 . The additive manufacturing device of claim 1 , wherein a diameter of filaments and/or wires which form a filter material of the permanent filter is less than 20 μm,

wherein a diameter of wires that form a support structure is more than 100 μm in thickness.

8 . The additive manufacturing device of claim 1 , wherein a dirty gas side of the permanent filter coming into contact with the process gas to be purified has a meandering pleated surface, at least in regions, wherein folds are disposed in the meandering pleated surface in order to form a pleated surface of the dirty gas side, wherein the folds for pleating are folds in a continuous fabric or are welded together and/or bonded together.

9 . The additive manufacturing device of claim 1 , wherein the permanent filter is disposed in the filter system in a manner such that a dirty gas side coming into contact with the process gas to be purified is an outer surface of the permanent filter and/or wherein the permanent filter is disposed in the filter system in a manner such that the dirty gas side coming into contact with the process gas to be purified is an inner surface of the permanent filter.

10 . The additive manufacturing device of claim 1 , wherein the permanent filter is configured in a manner such that an oxidation reaction of particles present in the permanent filter can be initiated, wherein the permanent filter is coupled to an energy input source, and a metal fabric or a portion of a metal fabric of the permanent filter constitutes a heating element.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (37)