Unpacking device allowing residual raw material powder removal

Patent metadata

Field	Value
Publication number	US-10543530-B2
Application number	US-201615350084-A
Country	US
Kind code	B2
Filing date	Nov 13, 2016
Priority date	Nov 13, 2015
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

An unpacking device for use in an apparatus for producing a three-dimensional work piece by irradiating layers of a raw material powder with electromagnetic or particle radiation, the unpacking device comprises a holding device which is configured to hold a building chamber arrangement. The building chamber arrangement comprises a building chamber accommodating a carrier, wherein the carrier is configured to receive a three-dimensional work piece produced from a raw material powder by an additive layering process. An engagement unit of the unpacking device is configured to engage with the carrier of the building chamber arrangement. A moving mechanism is configured to cause a relative movement between the building chamber and the engagement unit with the carrier engaged therewith so as to allow a separation of the carrier with a three-dimensional work piece received thereon from the building chamber. Finally, the unpacking device comprises a raw material powder removal mechanism which is configured to cause at least one of a vibration and a rotation of the engagement unit with the carrier engaged therewith so as to remove residual raw material powder from the three-dimensional work piece received on the carrier.

First claim

The invention claimed is:

1. An unpacking device for use in an apparatus for producing a three-dimensional work piece by irradiating layers of a raw material powder with electro-magnetic or particle radiation, the unpacking device comprising:
a holding device which is configured to hold a building chamber arrangement, wherein the building chamber arrangement comprises a building chamber accommodating a carrier, and wherein the carrier is configured to receive a three-dimensional work piece produced from a raw material powder by an additive layering process,
an engagement unit which is configured to engage with the carrier of the building chamber arrangement,
a moving mechanism which is configured to cause a relative movement between the building chamber and the engagement unit with the carrier engaged therewith so as to allow a separation of the carrier with a three-dimensional work piece received thereon from the building chamber, and
a raw material powder removal mechanism which is configured to cause at least one of a vibration and a rotation of the engagement unit with the carrier engaged therewith so as to remove residual raw material powder from the three-dimensional work piece received on the carrier.

2. The unpacking device according to claim 1 , wherein the holding device is configured to interact with an outer surface of the building chamber.

3. The unpacking device according to claim 1 , wherein the moving mechanism is configured to lift the building chamber and/or to lower the engagement unit with the carrier engaged therewith so as to separate the carrier from the building chamber.

4. The unpacking device according to claim 1 , wherein the moving mechanism is configured to cause a relative movement between the building chamber arrangement and the engagement unit so as to bring the engagement unit into engagement with the carrier.

5. The unpacking device according to claim 4 , wherein the moving mechanism is configured to lower the building chamber arrangement and/or to lift the engagement unit so as to bring the engagement unit into engagement with the carrier.

6. The unpacking device according to claim 1 , wherein the raw material powder removal mechanism comprises a rotatable shaft which is attached to the engagement unit and which is connected to a driving motor, the driving motor being configured to cause a rotational movement of the rotatable shaft so as to rotate the engagement unit with the carrier engaged therewith.

7. The unpacking device according to claim 1 , wherein the powder removal mechanism comprises a vibration motor which is connected to the engagement unit and which is configured to cause a vibration of the engagement unit with the carrier engaged therewith.

8. The unpacking device according to claim 1 ,
further comprising a powder collection device which is configured to collect residual raw material powder removed from the three-dimensional work piece by means of the raw material powder removal mechanism.

9. The unpacking device according to claim 1 , wherein the engagement unit is arranged in a sealed receiving box, wherein the receiving box is accessible via a lock which is configured to maintain a controlled atmosphere within the receiving box during engagement of the engagement unit with the carrier of the building chamber arrangement, during separation of the carrier with the three-dimensional work piece received thereon from the building chamber, and during removal of residual raw material powder from the three-dimensional work piece received on the carrier.

10. The unpacking device according to claim 1 , wherein the engagement unit is arranged in a sealed receiving box, wherein the receiving box is accessible via a lock which is configured to maintain a controlled atmosphere within the receiving box during engagement of the engagement unit with the carrier of the building chamber arrangement, during separation of the carrier with the three-dimensional work piece received thereon from the building chamber, and during removal of residual raw material powder from the three-dimensional work piece received on the carrier, and wherein the receiving box is designed in the form of a glove box which is provided with at least one gripping glove.

11. The unpacking device according to claim 1 , further comprising a suction system which is configured to withdraw residual raw material powder from the three-dimensional work piece received on the carrier.

12. A method of operating an unpacking device for use in an apparatus for producing a three-dimensional work piece by irradiating layers of a raw material powder with electromagnetic or particle radiation, the method comprising:
holding a building chamber arrangement by means of a holding device, wherein the building chamber arrangement comprises a building chamber accommodating a carrier, and wherein the carrier is configured to receive a three-dimensional work piece produced from a raw material powder by an additive layering process,
engaging an engagement unit with the carrier of the building chamber arrangement,
causing a relative movement between the building chamber and the engagement unit with the carrier engaged therewith by means of a moving mechanism so as to allow a separation of the carrier with a three-dimensional work piece received thereon from the building chamber, and
causing at least one of a vibration and a rotation of the engagement unit with the carrier engaged therewith by means of a raw material powder removal mechanism so as to remove residual raw material powder from the three-dimensional work piece received on the carrier.

13. The method according to claim 12 , wherein the holding device interacts with an outer surface of the building chamber.

14. The method according to claim 12 , wherein the building chamber is lifted and/or the engagement unit with the carrier engaged therewith is lowered so as to separate the carrier from the building chamber.

15. The method according to claim 12 , further comprising the step of causing a relative movement between the building chamber arrangement and the engagement unit by means of the moving mechanism so as to bring the engagement unit into engagement with the carrier.

16. The method according to claim 15 , wherein the moving mechanism lowers the building chamber arrangement and/or lifts the engagement unit so as to bring the engagement unit into engagement with the carrier.

17. The method according to claim 12 , wherein the raw material powder removal mechanism comprises at least one of:
a rotatable shaft which is attached to the engagement unit and which is connected to a driving motor, the driving motor causing a rotational movement of the rotatable shaft so as to rotate the engagement unit with the carrier engaged therewith,
a vibration motor which is connected to the engagement unit and causes a vibration of the engagement unit with the carrier engaged therewith.

18. The method according to claim 12 , further comprising at least one of the following steps:
collecting residual raw material powder removed from the three-dimensional work piece by means of the raw material powder removal mechanism,
maintaining a controlled atmosphere within a sealed receiving box accommodating the engagement unit during engagement of the engagement unit with the carrier of the building chamber arrangement, during separation of the carrier with the three-dimensional work piece received thereon from the building chamber and during removal of residual raw material powder from the three-dimensional work piece received on the carrier by m

Assignees

• SLM Solutions Group AG

Inventors

• Hermann André
• Krol Toni Adam
• Wiesner Andreas
• Wilkes Jan
• Haack Bodo
• Huebinger Karsten
• Koerner Peter
• Mueller Simon
• Berggreen Kaj Merten
• Mersch Jonas

Classifications

• B29C64/357

  Recycling · CPC title

• B29C64/153

  using layers of powder being selectively joined, e.g. by selective laser sintering or melting · CPC title

• B22F3/105 Primary

  by using electric current {other than for infrared radiant energy}, laser radiation or plasma (B22F3/11 takes precedence){; by ultrasonic bonding (B22F3/115 takes precedence)} · CPC title

• B23K15/0026

  Auxiliary equipment · CPC title

• B23K26/342

  Build-up welding · CPC title